CN116471780B - Oxygen sensor heat dissipation shell for pilot mask - Google Patents
Oxygen sensor heat dissipation shell for pilot mask Download PDFInfo
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- CN116471780B CN116471780B CN202310448277.XA CN202310448277A CN116471780B CN 116471780 B CN116471780 B CN 116471780B CN 202310448277 A CN202310448277 A CN 202310448277A CN 116471780 B CN116471780 B CN 116471780B
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- Prior art keywords
- temperature
- oxygen sensor
- shell
- neck flask
- heat dissipation
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- 239000001301 oxygen Substances 0.000 title claims abstract description 93
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 93
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 70
- 238000003860 storage Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000004965 Silica aerogel Substances 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 91
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 73
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 72
- 239000004917 carbon fiber Substances 0.000 claims description 72
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 44
- 238000010438 heat treatment Methods 0.000 claims description 44
- 229920005989 resin Polymers 0.000 claims description 41
- 239000011347 resin Substances 0.000 claims description 41
- 239000006260 foam Substances 0.000 claims description 38
- 229920000877 Melamine resin Polymers 0.000 claims description 36
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 36
- 238000001035 drying Methods 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 30
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 29
- 239000000243 solution Substances 0.000 claims description 25
- 239000000805 composite resin Substances 0.000 claims description 23
- 239000006185 dispersion Substances 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 235000019441 ethanol Nutrition 0.000 claims description 21
- 150000004756 silanes Chemical class 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 17
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 15
- 239000008213 purified water Substances 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 239000012065 filter cake Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000011812 mixed powder Substances 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 13
- 239000011259 mixed solution Substances 0.000 claims description 12
- YXVFYQXJAXKLAK-UHFFFAOYSA-N biphenyl-4-ol Chemical compound C1=CC(O)=CC=C1C1=CC=CC=C1 YXVFYQXJAXKLAK-UHFFFAOYSA-N 0.000 claims description 11
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 238000000967 suction filtration Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 9
- 239000004327 boric acid Substances 0.000 claims description 9
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 claims description 6
- AHUXYBVKTIBBJW-UHFFFAOYSA-N dimethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OC)(OC)C1=CC=CC=C1 AHUXYBVKTIBBJW-UHFFFAOYSA-N 0.000 claims description 6
- CVQVSVBUMVSJES-UHFFFAOYSA-N dimethoxy-methyl-phenylsilane Chemical compound CO[Si](C)(OC)C1=CC=CC=C1 CVQVSVBUMVSJES-UHFFFAOYSA-N 0.000 claims description 6
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims description 5
- 238000002386 leaching Methods 0.000 claims description 5
- 239000012074 organic phase Substances 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 5
- 230000007480 spreading Effects 0.000 claims description 5
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 239000000908 ammonium hydroxide Substances 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000010000 carbonizing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- 239000008098 formaldehyde solution Substances 0.000 claims 2
- 238000003754 machining Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 238000010112 shell-mould casting Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 230000005672 electromagnetic field Effects 0.000 abstract description 5
- 229910021487 silica fume Inorganic materials 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 20
- 239000000047 product Substances 0.000 description 20
- 238000005303 weighing Methods 0.000 description 18
- 238000011049 filling Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 5
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 3
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 208000002381 Brain Hypoxia Diseases 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- MHDVGSVTJDSBDK-UHFFFAOYSA-N dibenzyl ether Chemical compound C=1C=CC=CC=1COCC1=CC=CC=C1 MHDVGSVTJDSBDK-UHFFFAOYSA-N 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- -1 oxygen ions Chemical class 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- 201000004569 Blindness Diseases 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- CQRYARSYNCAZFO-UHFFFAOYSA-N salicyl alcohol Chemical compound OCC1=CC=CC=C1O CQRYARSYNCAZFO-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 206010042772 syncope Diseases 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/28—Chemically modified polycondensates
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention discloses an oxygen sensor heat dissipation shell for a pilot mask and a preparation method thereof, and belongs to the technical field of heat dissipation shell processing. The invention is used for solving the technical problems of poor heat insulation effect and electromagnetic shielding effect of an oxygen sensor heat dissipation shell for a pilot mask in the prior art, and comprises a shell, wherein the shell is sleeved outside the shell, a storage cavity is arranged between the shell and the shell, micro silica aerogel is filled in the storage cavity, a plurality of heat dissipation holes are formed in the outer wall of the top of the shell, and two horizontally arranged limiting rings are arranged on the inner side of the shell. The oxygen sensor heat dissipation shell for the pilot mask has good heat dissipation effect, improves the heat insulation performance, tensile strength and compression strength of the heat dissipation shell, can effectively shield the interference of external electromagnetic fields, and improves the detection precision of the oxygen sensor.
Description
Technical Field
The invention relates to the technical field of heat dissipation shell processing, in particular to an oxygen sensor heat dissipation shell for a pilot mask and a preparation method thereof.
Background
The flight speed of the fighter reaches mach level, and the flight speed is very high, and the pilot needs to bear extremely large overload when driving the fighter, and in this case, the blood of the pilot moves downwards to the legs due to the action of gravity. Thereby the phenomena of cerebral hypoxia and the like appear. The pilot wears the pilot mask to detect the oxygen concentration and directly press the oxygen into the lungs of the pilot, so that the oxygen content in the blood of the pilot is increased to protect the pilot, and the pilot cannot be subjected to temporary blindness or syncope due to cerebral hypoxia.
The oxygen sensor uses Nernst principle, and its core element is porous ZrO 2 The ceramic tube is a solid electrolyte, and porous platinum (Pt) electrodes are sintered on two sides of the ceramic tube respectively. At a certain temperature, oxygen molecules on the inner side of the ceramic tube are adsorbed on the platinum electrode to combine with electrons (4 e) to form oxygen ions O due to different oxygen concentrations on the two sides 2- Positively charging the electrode, O 2- Ions migrate to the exhaust gas side through oxygen ion vacancies in the electrolyte, negatively charging the electrode, i.e., creating a potential difference, with the greater the concentration difference, the greater the potential difference.
The oxygen sensor on the pilot mask in the prior art is influenced by the working principle of the oxygen sensor, so that the working temperature of the oxygen sensor is 300-600 ℃, a large amount of heat can be generated in the working process of the oxygen sensor, a heat dissipation shell is usually arranged outside the oxygen sensor to avoid damage to the pilot due to the rising of the temperature of the mask due to heat collection, but the existing heat dissipation shell is usually made of high-temperature-resistant plastic materials, the heat generated in the working process of the oxygen sensor can be diffused outwards along the side wall of the heat dissipation shell, the heat insulation effect of the heat dissipation shell is poor, the number of electronic elements on the existing pilot mask is large, and electromagnetic fields generated by other electronic elements on the mask in the working process can interfere with the oxygen sensor, so that the detection precision of the oxygen sensor is required to be further improved.
In view of the technical drawbacks of this aspect, a solution is now proposed.
Disclosure of Invention
The invention aims to provide an oxygen sensor heat dissipation shell for a pilot mask and a preparation method thereof, which are used for solving the technical problems that the heat insulation effect of the oxygen sensor heat dissipation shell for the pilot mask is poor, electromagnetic fields generated by other electronic elements on the pilot mask during the working process can interfere the oxygen sensor, and the detection precision of the oxygen sensor needs to be further improved in the prior art.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides an oxygen sensor heat dissipation shell for pilot's face guard, includes the casing, the outside cover of casing is equipped with the shell, be equipped with the storage cavity between shell and the casing, the intussuseption of storage cavity is filled with microsilica aerogel, a plurality of louvres have been seted up to the top outer wall of casing, the inboard of casing is equipped with the spacing ring that two levels set up, two the outer wall of spacing ring is all through a plurality of connecting blocks and the inner wall rigid coupling of casing, and two a plurality of spacing draw-in grooves have all been seted up to the inside wall of spacing ring.
Further, the top of casing is equipped with the collar, the equal rigid coupling in top both ends of collar has the joint post, the inboard of collar is equipped with the internal thread, the top outer lane of casing is equipped with internal thread matched with external screw thread.
The preparation method of the oxygen sensor heat dissipation shell for the pilot mask comprises the following operation steps:
s1, adding p-phenylphenol, formaldehyde aqueous solution and a catalyst into a three-neck flask, stirring, raising the temperature of the three-neck flask to 70-80 ℃, reacting for 0.5-1h, adding boric acid into the three-neck flask, raising the temperature of the three-neck flask to 105-115 ℃, reacting for 2-3h, adding modified silane into the three-neck flask, stirring for 40-60min, and performing post treatment to obtain a modified resin solution;
in the reaction process, under the condition of a catalyst, a reaction system is made to be alkaline, the p-phenylphenol and formaldehyde firstly undergo an addition reaction to generate hydroxymethyl phenol, then react with boric acid at a higher temperature to generate resin, boron elements are introduced into a resin structure to generate boron-oxygen bonds with higher bond energy, and therefore the heat resistance, toughness, carbon residue rate, instantaneous high temperature resistance and mechanical property of the resin are improved.
S2, carrying out dispersion treatment on the pretreated carbon fibers and the carbon foam, and uniformly dispersing the pretreated carbon fibers and the carbon foam in an ethanol solution to obtain a dispersion liquid;
s3, adding the modified resin solution and the dispersion liquid into a three-neck flask according to a weight ratio of 10:3, setting the rotating speed to be 450-550r/min, stirring for 40-50min, increasing the temperature of the three-neck flask to 60-70 ℃, and evaporating solvent ethanol under reduced pressure to obtain composite resin;
s4, adding the composite resin into a cavity of an oxygen sensor heat dissipation shell forming die, filling the cavity, transferring the die into an oven with the temperature of 80-100 ℃ for drying for 10-12 hours, and removing the die outside the die to obtain an oxygen sensor heat dissipation shell primary product;
s5, placing the primary product of the heat dissipation shell of the oxygen sensor into a muffle furnace, and carbonizing the primary product at high temperature to obtain a finished product of the heat dissipation shell of the oxygen sensor.
Further, the weight ratio of the p-phenylphenol to the formaldehyde aqueous solution to the catalyst to the boric acid to the modified silane is 5:5:0.2:2:2, the mass concentration of the formaldehyde aqueous solution is 37%, and the catalyst is any one of sodium hydroxide, ammonium hydroxide, calcium hydroxide and ethylamine.
Further, the processing steps of the modified silane include:
a1, adding tetraethoxysilane, diphenyl dimethoxy silane, methylphenyl dimethoxy silane, dimethyl diethoxy silane, hydrochloric acid, toluene and n-butanol into a three-neck flask according to a weight ratio of 12:5:2:5:15:40:8, stirring, heating the three-neck flask to 70-80 ℃, reacting for 2-3 hours, dropwise adding n-butylamine into the three-neck flask, regulating the pH=7 of the system, and separating liquid;
a2, transferring the organic phase into a three-neck flask with a water separator, stirring, raising the temperature of the three-neck flask to 115-125 ℃, reacting for 2-3h, lowering the temperature of the three-neck flask to 85-90 ℃, and evaporating the solvent under reduced pressure to obtain the modified silane.
In the reaction process, tetraethoxysilane, diphenyl dimethoxy silane, methyl phenyl dimethoxy silane and dimethyl diethoxy silane are hydrolyzed in an acidic environment to generate silicon hydroxyl, and after the pH=7 of a system is regulated by n-butylamine, the silicon hydroxyl and the silicon hydroxyl are dehydrated and condensed at high temperature to generate the modified silane with a network structure.
Further, the pre-treatment carbon fiber processing operation includes:
b1, uniformly mixing acetone and ethanol according to a volume ratio of 1:1 to obtain a mixed solution, adding chopped carbon fibers with a diameter of 6 mu m and the mixed solution into a beaker according to a weight ratio of 1:5 to uniformly mix, placing the beaker into an ultrasonic disperser with a speed of 120W and a speed of 40kHz, performing ultrasonic treatment for 60-90min, performing suction filtration, leaching a filter cake with purified water, transferring the filter cake into a drying oven with a temperature of 75-85 ℃, and drying for 10-12h to obtain dried carbon fibers;
and B2, spreading the dried carbon fibers on a heating plate with the temperature of 200-240 ℃, covering a metal cover plate on the upper surface of the carbon fibers, applying pressure of 0.5-1.5MPa to the metal cover plate, and carrying out heat preservation and hot pressing for 40-60min to obtain the pretreated carbon fibers.
In the reaction process, the carbon fiber is ultrasonically washed through the mixed solution of acetone and ethanol to remove organic matters on the surface of the carbon fiber, so that the surface of the carbon fiber is exposed, and then the carbon fiber is sequentially dried and burnt for oxidization, so that the surface area, the surface roughness, the surface cracks and the pit number of the carbon fiber are increased, the physicochemical properties of the fiber surface are changed, the generation of a weak interface layer between the pretreated carbon fiber and the modified resin is prevented, and the affinity and the adhesive force of the resin and the reinforcing material are improved.
Further, the preparation method of the carbon foam comprises the following steps: the preparation method comprises the steps of taking melamine foam as a raw material, cutting the melamine foam into a required shape and size, cleaning the melamine foam with absolute ethyl alcohol and purified water, transferring the cleaned melamine foam into a drying oven with the temperature of 70-80 ℃, drying the melamine foam for 15-18h, placing the melamine foam into a muffle furnace protected by nitrogen, raising the temperature of the muffle furnace to 700-800 ℃ at the heating rate of 5 ℃/min, preserving the heat for 2h, and reducing the muffle furnace to room temperature under the protection of nitrogen to obtain the carbon foam.
The melamine foam has a highly fine three-dimensional reticular cross-linked structure, after stains on the surface of the melamine foam are cleaned, the melamine foam is placed in a muffle furnace protected by nitrogen atmosphere, organic impurities or other oxygen-containing functional groups in the melamine foam are cracked off through high-temperature treatment, generated gas escapes and pores are left, the porous carbon foam with the three-dimensional reticular structure is obtained, gaps among the pretreated carbon fibers are filled by the carbon foam, so that the reinforcing effect of the carbon fibers on the modified resin is improved, the mechanical property of the modified resin is further improved, and the heat insulation property of the modified resin can be effectively improved by the porous carbon foam.
Further, the operation of the dispersion process is as follows: adding pretreated carbon fiber, carbon foam, 3-aminopropyl triethoxysilane and water into a beaker according to a weight ratio of 1:0.8:2:6, stirring, adding 5mol/L hydrochloric acid into the beaker at room temperature, adjusting pH=4-5 of the system, raising the temperature of the beaker to 75-85 ℃, reacting for 2-3 hours, carrying out suction filtration, sequentially eluting a filter cake by purified water and ethanol, transferring the filter cake into a drying oven with a temperature of 55-65 ℃ and drying for 4-6 hours to obtain mixed powder, adding the mixed powder and absolute ethanol into the beaker according to a weight ratio of 1:5, stirring for 10 minutes, transferring the mixed powder into an ultrasonic disperser with a temperature of 120W and 40kHz, and carrying out ultrasonic treatment for 120-160 minutes to obtain a dispersion liquid.
Under the acidic condition, siloxane on the 3-aminopropyl triethoxy silane is hydrolyzed to generate silicon hydroxyl which reacts with the outer surfaces of the pretreated carbon fiber and the carbon foam and is grafted to the outside of the pretreated carbon fiber and the carbon foam, thereby being beneficial to improving the dispersibility of the pretreated carbon fiber and the carbon foam in an ethanol environment.
Further, the high temperature carbonization includes: filling nitrogen into the muffle furnace to enable the internal cavity of the muffle furnace to be filled with the nitrogen, heating the muffle furnace to 200 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating the muffle furnace to 500 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating the muffle furnace to 600 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating the muffle furnace to 700 ℃ at a heating rate of 2 ℃/min, preserving heat for 1h, and reducing the temperature of the muffle furnace to room temperature at a cooling rate of 2.5 ℃/min.
In the high-temperature carbonization process, the temperature of the modified resin is programmed under the protection of nitrogen, under the action of high temperature, the methylene on the main chain of the modified resin is firstly broken, and along with the breaking of the methylene, the modified resin starts deoxidization and dehydrogenation, and takes H as the raw material 2 、CO 2 、CH 4 The gases such as benzene, cresol and the like escape, the residual carbon atoms and hydrogen atoms are gradually cracked into benzene ring micromolecules, the benzene ring micromolecules start to be rearranged along with the further increase of the temperature, an amorphous body with a graphitized structure is formed, the amorphous body with the graphitized structure is adhered to the surfaces of the pretreated carbon fiber and the carbon foam, the curing strengthening effect is achieved, the three-dimensional porous structures of the high molecular weight, the high aryl structure and the carbon foam of the modified resin are mutually matched, and the high temperature resistance and the heat insulation performance of the finished product of the heat dissipation shell of the oxygen sensor are effectively improved.
The invention has the following beneficial effects:
according to the oxygen sensor heat dissipation shell for the pilot mask, melamine foam with a high-definition three-dimensional network structure is selected as a raw material, organic impurities or other oxygen-containing functional groups on the melamine foam are cracked off through high-temperature treatment, the porous carbon foam with the three-dimensional network structure is prepared, the surface of the carbon fiber is exposed through ethanol and acetone mixed solution, the carbon fiber is subjected to burning oxidation treatment, the surface area, the surface roughness, the surface cracks and the pit number of the carbon fiber are increased, the affinity and the adhesive force of the carbon fiber and a resin material are improved, the pretreated carbon fiber and the carbon foam are subjected to 3-aminopropyl triethoxysilane modification treatment, and the 3-aminopropyl triethoxysilane is grafted on the surface of the carbon fiber and the carbon foam, so that the dispersibility of the pretreated carbon fiber and the carbon foam in an ethanol environment is improved, the dispersion uniformity of the pretreated carbon fiber and the carbon foam in the modified resin solution is further improved, the pretreated carbon fiber and the carbon foam are uniformly distributed, the mechanical property of the composite resin is improved, the high conductivity of the carbon foam is improved, the electromagnetic field of the composite resin can be effectively shielded, and the accuracy of the nitrogen sensor can be guaranteed, and the oxygen sensor can be effectively shielded from the nitrogen sensor is mounted inside the sensor.
In the preparation process of the oxygen sensor heat dissipation shell for the pilot mask, p-phenylphenol reacts with formaldehyde under the condition of a catalyst to generate the p-phenylphenol with hydroxymethyl, then the p-phenylphenol reacts with boric acid at a higher temperature to generate a resin with boron-oxygen bonds, then reticular modified silane with flexibility and good high-temperature oxidation resistance is added into a reaction system, the modified silane and the resin are mutually fused in a stirring state to prepare a modified resin solution, the modified resin exists in the form of a solution, the dispersion liquid can be uniformly dispersed in the modified resin solution, the dispersibility of pretreated carbon fibers and carbon foam in the modified resin is further improved, the hydroxymethyl on a phenol core in the composite resin reacts with the ortho-position or para-position active hydrogen on other phenol cores in the high-temperature environment to generate a methylene bond, or the hydroxymethyl on two phenol cores react with each other to generate a molecule of water to generate dibenzyl ether, the curing of the composite resin is promoted, and the polyaryl and boron-oxygen bond structure on the composite resin is effectively improved in heat resistance, high-temperature instantaneous carbon resistance and mechanical property.
According to the oxygen sensor heat dissipation shell for the pilot mask, in the preparation process, a heat-cured and molded oxygen sensor heat dissipation shell primary product is placed into a muffle furnace protected by nitrogen for high-temperature carbonization treatment, the methylene on the composite resin is firstly broken under the anaerobic environment and the high-temperature effect, the composite resin begins to deoxidize and dehydrogenate, the rest carbon atoms and hydrogen atoms are gradually cracked into benzene ring type small molecules, the benzene ring type small molecules begin to rearrange along with the further increase of the temperature, an amorphous body with a graphitized structure is formed, the amorphous body with the graphitized structure is adhered to the surfaces of the pretreated carbon fibers and the carbon foam, the curing and strengthening effects are achieved, the high molecular weight, the high aryl structure and the three-dimensional porous structure of the carbon foam of the modified resin are mutually matched, the high-temperature resistance and the heat insulation performance of the oxygen sensor heat dissipation shell finished product are effectively improved, and the weight of the oxygen sensor heat dissipation shell is lightened.
In the preparation process of the oxygen sensor heat dissipation shell for the pilot mask, the nitrogen oxygen sensor is conveniently arranged on the inner side of the shell through the mutual matching of the shell, the limiting ring, the limiting clamping groove and the limiting clamping block which is arranged outside the oxygen sensor and is mutually matched with the limiting clamping groove, the heat dissipation effect of the oxygen sensor shell can be improved through the heat dissipation holes arranged on the shell, and the temperature rise of the shell caused by heat conduction inside the shell and the micro silica aerogel arranged in the storage cavity can be avoided through the shell sleeved outside the shell, so that the heat insulation performance of the oxygen sensor heat dissipation shell is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of the entire heat dissipation housing of an oxygen sensor for a pilot's mask;
FIG. 2 is a schematic cross-sectional view of the entire heat dissipation housing of the oxygen sensor for a pilot mask of the present invention;
FIG. 3 is a schematic view of the overall structure of the stop collar of the present invention;
FIG. 4 is a schematic view of the mating structure of the oxygen sensor heat dissipation housing and mounting ring of the pilot mask of the present invention.
In the figure: 100. a housing; 101. a heat radiation hole; 200. a housing; 201. a storage cavity; 300. a limiting ring; 301. a connecting block; 302. a limit clamping groove; 400. a mounting ring; 401. a clamping column; 402. and (5) external threads.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-3, the heat dissipation housing of the oxygen sensor for the pilot mask of this embodiment includes a cylindrical housing 100 with an opening at the bottom, a housing 200 is sleeved outside the housing 100, a storage cavity 201 is provided between the housing 200 and the housing 100, micro silica aerogel is filled in the storage cavity 201, a plurality of heat dissipation holes 101 are provided on the top outer wall of the housing 100, two horizontally arranged limiting rings 300 are provided on the inner side of the housing 100, the outer walls of the two limiting rings 300 are fixedly connected with the inner wall of the housing 100 through a plurality of connecting blocks 301, and a plurality of limiting clamping grooves 302 are provided on the inner side walls of the two limiting rings 300.
The limiting clamping blocks (not shown) matched with the limiting clamping grooves 302 are sleeved outside the oxygen sensor (not shown), then the limiting clamping blocks are placed into the inner side of the shell 100 from the bottom opening of the shell 100, the oxygen sensor is rotated, the limiting clamping blocks are clamped with the limiting clamping grooves 302, the oxygen sensor is conveniently installed and fixed, a part of high temperature generated in the working process of the oxygen sensor is dissipated from the radiating holes 101, a part of the high temperature is diffused towards the inner wall of the shell 100, the shell 200 sleeved outside the shell 100 and the micro silica aerogel installed in the storage cavity 201 can avoid temperature rise of the shell 200 caused by heat conduction inside the shell 100, and the heat insulation performance of the radiating shell of the oxygen sensor is effectively improved.
Example 2
Referring to fig. 4, in the oxygen sensor heat dissipation housing for a pilot mask of this embodiment, a mounting ring 400 is provided at the top of a housing 100, two ends of the top of the mounting ring 400 are fixedly connected with a clamping post 401, an inner thread is provided at the inner side of the mounting ring 400, and an outer thread 402 matched with the inner thread is provided at the outer ring of the top of the housing 100.
The two clamping posts 401 are clamped and fixed with the pilot mask, and the shell 100 is rotated, so that the top of the shell 100 moves to the inner side of the mounting ring 400 to be in threaded connection with the mounting ring 400 until the plurality of heat dissipation holes 101 are positioned above the mounting ring 400, and the shell 100 is conveniently mounted on the pilot mask.
Example 3
Referring to fig. 1-4, the method for preparing the heat dissipation shell of the oxygen sensor for the pilot mask of the embodiment comprises the following operation steps:
s1, preparing modified silane
Weighing the following components in parts by weight: 120g of tetraethoxysilane, 50g of diphenyl dimethoxy silane, 20g of methylphenyl dimethoxy silane, 50g of dimethyl diethoxy silane, 150g of 5mol/L hydrochloric acid, 400g of toluene and 80g of n-butanol are added into a three-neck flask, the temperature of the three-neck flask is increased to 70 ℃, the reaction is carried out for 2 hours, n-butylamine is added into the three-neck flask in a dropwise manner, the pH=7 of the system is regulated, and the solution is separated;
transferring the organic phase into a three-neck flask with a water separator, stirring, increasing the temperature of the three-neck flask to 115 ℃, reacting for 2 hours, separating water generated by the reaction through the water separator in the reaction process, reducing the temperature of the three-neck flask to 85 ℃ after the reaction is completed, and evaporating the solvent under reduced pressure to obtain the modified silane.
S2, preparing modified resin solution
Weighing the following components in parts by weight: 500g of p-phenylphenol, 500g of 37% formaldehyde aqueous solution and 20g of sodium hydroxide are added into a three-neck flask, the temperature of the three-neck flask is increased to 70 ℃ for reaction for 30min, 200g of boric acid is added into the three-neck flask, the temperature of the three-neck flask is increased to 105 ℃ for reaction for 2h, 200g of modified silane is added into the three-neck flask, stirring for 40min is completed, the three-neck flask is kept at 105 ℃ for reduced pressure distillation to remove the solvent, the three-neck flask is cooled to room temperature to obtain modified resin, ethanol with the same mass as the modified resin is added into the three-neck flask, the temperature of the three-neck flask is increased to 50 ℃, stirring for 1h is carried out, and the temperature is reduced to room temperature to obtain 50wt% modified resin solution.
S3, preparing pretreated carbon fiber
Selecting chopped carbon fiber with the diameter of 6 mu m and the length of 1-2mm produced by Jiangsu Chuangyu carbon fiber technology Co., ltd as a carbon fiber raw material;
uniformly mixing acetone and ethanol according to a volume ratio of 1:1 to obtain a mixed solution;
weighing the following components in parts by weight: adding 100g of carbon fiber and 500g of mixed solution into a beaker, uniformly mixing, placing the beaker into an ultrasonic disperser with the temperature of 120W and 40kHz, carrying out ultrasonic treatment for 60min, carrying out suction filtration, leaching a filter cake with purified water, transferring to a drying oven with the temperature of 75 ℃, and drying for 10h to obtain dried carbon fiber;
spreading the dried carbon fiber on a heating plate with the temperature of 200 ℃, covering a metal cover plate on the upper surface of the carbon fiber, applying the pressure of 0.5MPa on the metal cover plate, and carrying out heat preservation and hot pressing for 40min to obtain the pretreated carbon fiber.
S4, preparing carbon foam
Melamine foam produced by Zhengzhou Fengtai nano material Co., ltd is selected as a raw material;
cutting melamine foam into required shape and size, cleaning the melamine foam with absolute ethyl alcohol and purified water, transferring the cleaned melamine foam into a drying oven with the temperature of 70 ℃, drying the melamine foam for 15 hours, placing the melamine foam into a muffle furnace protected by nitrogen, raising the temperature of the muffle furnace to 900 ℃ at the heating rate of 5 ℃/min, preserving the heat for 2 hours, and reducing the muffle furnace to room temperature under the protection of nitrogen to obtain the carbon foam.
S5, preparing dispersion liquid
Weighing the following components in parts by weight: adding 80g of pretreated carbon fiber, 64g of carbon foam, 160g of 3-aminopropyl triethoxysilane and 480g of water into a beaker, stirring, adding 5mol/L hydrochloric acid into the beaker at room temperature, adjusting the pH value of the system to be=4, raising the temperature of the beaker to 75 ℃, reacting for 2 hours, carrying out suction filtration, eluting a filter cake by purified water and ethanol in sequence, transferring to a drying box with the temperature of 55 ℃, and drying for 4 hours to obtain mixed powder;
weighing the following components in parts by weight: 30g of mixed powder and 150g of absolute ethyl alcohol are added into a beaker, stirred for 10min, then transferred into a 120W ultrasonic disperser with 40kHz ultrasonic disperser, and ultrasonic treated for 120min to obtain dispersion liquid.
S6, preparing composite resin
Weighing the following components in parts by weight: 800g of modified resin solution and 240g of dispersion are added into a three-neck flask, the rotating speed is set to be 450r/min, stirring is carried out for 40min, the temperature of the three-neck flask is increased to 60 ℃, and the solvent is distilled off under reduced pressure, so that the composite resin is obtained.
S7, preparing an initial product of the heat dissipation shell of the oxygen sensor
Manufacturing an oxygen sensor heat dissipation shell forming die according to the shape of the oxygen sensor heat dissipation shell by using a plastic sheet;
adding the composite resin into a cavity of an oxygen sensor heat dissipation shell forming die, knocking and vibrating the outer wall of the forming die, tamping the composite resin in the cavity, filling the cavity, transferring the die into an oven with the temperature of 80 ℃ for drying for 10 hours, and removing the die outside the die to obtain an oxygen sensor heat dissipation shell primary product.
S8, preparing a finished product of the heat dissipation shell of the oxygen sensor
Placing the primary product of the heat dissipation shell of the oxygen sensor into a muffle furnace, filling nitrogen into the muffle furnace, enabling the nitrogen to fill the inner cavity of the muffle furnace, heating up to 200 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 500 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 600 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 700 ℃ at a heating rate of 2 ℃/min, preserving heat for 1h, and cooling down to room temperature at a cooling rate of 2.5 ℃/min.
Example 4
Referring to fig. 1-4, the method for preparing the heat dissipation shell of the oxygen sensor for the pilot mask of the embodiment comprises the following operation steps:
s1, preparing modified silane
Weighing the following components in parts by weight: 120g of tetraethoxysilane, 50g of diphenyl dimethoxy silane, 20g of methylphenyl dimethoxy silane, 50g of dimethyl diethoxy silane, 150g of 5mol/L hydrochloric acid, 400g of toluene and 80g of n-butanol are added into a three-neck flask, the temperature of the three-neck flask is increased to 75 ℃, the reaction is carried out for 2.5h, n-butylamine is added into the three-neck flask in a dropwise manner, the pH=7 of the system is regulated, and the solution is separated;
transferring the organic phase into a three-neck flask with a water separator, stirring, increasing the temperature of the three-neck flask to 120 ℃, reacting for 2.5h, separating water generated by the reaction through the water separator in the reaction process, reducing the temperature of the three-neck flask to 87 ℃ after the reaction is completed, and evaporating the solvent under reduced pressure to obtain the modified silane.
S2, preparing modified resin solution
Weighing the following components in parts by weight: 500g of p-phenylphenol, 500g of 37% formaldehyde aqueous solution and 20g of ammonium hydroxide are added into a three-neck flask, the temperature of the three-neck flask is increased to 75 ℃ for reaction for 45min, 200g of boric acid is added into the three-neck flask, the temperature of the three-neck flask is increased to 110 ℃, reaction is carried out for 2.5h, 200g of modified silane is added into the three-neck flask, stirring is carried out for 50min, after the stirring is completed, the three-neck flask is kept at 110 ℃, the solvent is distilled off under reduced pressure, the temperature of the three-neck flask is reduced to room temperature, the modified resin is obtained, ethanol with the same mass as the modified resin is added into the three-neck flask, the temperature of the three-neck flask is increased to 55 ℃, stirring is carried out for 1.5h, and the temperature is reduced to the room temperature, and 50wt% of modified resin solution is obtained.
S3, preparing pretreated carbon fiber
Selecting chopped carbon fiber with the diameter of 6 mu m and the length of 1-2mm produced by Jiangsu Chuangyu carbon fiber technology Co., ltd as a carbon fiber raw material;
uniformly mixing acetone and ethanol according to a volume ratio of 1:1 to obtain a mixed solution;
weighing the following components in parts by weight: adding 100g of carbon fiber and 500g of mixed solution into a beaker, uniformly mixing, placing the beaker into an ultrasonic disperser with the temperature of 120W and 40kHz, carrying out ultrasonic treatment for 75min, carrying out suction filtration, leaching a filter cake with purified water, transferring to a drying oven with the temperature of 80 ℃, and drying for 11h to obtain dried carbon fiber;
spreading the dried carbon fiber on a heating plate with the temperature of 220 ℃, covering a metal cover plate on the upper surface of the carbon fiber, applying the pressure of 1.0MPa on the metal cover plate, and carrying out heat preservation and hot pressing for 50min to obtain the pretreated carbon fiber.
S4, preparing carbon foam
Melamine foam produced by Zhengzhou Fengtai nanometer materials is selected as a raw material,
cutting melamine foam into required shape and size, cleaning the melamine foam with absolute ethyl alcohol and purified water, transferring the cleaned melamine foam into a drying oven with the temperature of 75 ℃, drying the melamine foam for 17 hours, placing the melamine foam into a muffle furnace protected by nitrogen, raising the temperature of the muffle furnace to 950 ℃ at the heating rate of 5 ℃/min, preserving the heat for 2 hours, and reducing the muffle furnace to room temperature under the protection of nitrogen to obtain the carbon foam.
S5, preparing dispersion liquid
Weighing the following components in parts by weight: adding 80g of pretreated carbon fiber, 64g of carbon foam, 160g of 3-aminopropyl triethoxysilane and 480g of water into a beaker, stirring, adding 5mol/L hydrochloric acid into the beaker at room temperature, adjusting the pH value of the system to be 4.5, raising the temperature of the beaker to 80 ℃, reacting for 2.5 hours, carrying out suction filtration, eluting a filter cake by purified water and ethanol in sequence, transferring to a drying oven with the temperature of 60 ℃, and drying for 5 hours to obtain mixed powder;
weighing the following components in parts by weight: 30g of mixed powder and 150g of absolute ethyl alcohol are added into a beaker, stirred for 10min, then transferred into a 120W ultrasonic disperser with 40kHz ultrasonic disperser, and ultrasonic treated for 140min to obtain dispersion liquid.
S6, preparing composite resin
Weighing the following components in parts by weight: 800g of modified resin solution and 240g of dispersion are added into a three-neck flask, the rotating speed is set to be 500r/min, stirring is carried out for 45min, the temperature of the three-neck flask is increased to 65 ℃, and the solvent is distilled off under reduced pressure, so that the composite resin is obtained.
S7, preparing an initial product of the heat dissipation shell of the oxygen sensor
Manufacturing an oxygen sensor heat dissipation shell forming die according to the shape of the oxygen sensor heat dissipation shell by using a plastic sheet;
adding the composite resin into a cavity of an oxygen sensor heat dissipation shell forming die, knocking and vibrating the outer wall of the forming die, tamping the composite resin in the cavity, filling the cavity, transferring the die into a baking oven with the temperature of 90 ℃ for drying for 11 hours, and removing the die outside the mold to obtain the primary product of the oxygen sensor heat dissipation shell.
S8, preparing a finished product of the heat dissipation shell of the oxygen sensor
Placing the primary product of the heat dissipation shell of the oxygen sensor into a muffle furnace, filling nitrogen into the muffle furnace, enabling the nitrogen to fill the inner cavity of the muffle furnace, heating up to 200 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 500 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 600 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 700 ℃ at a heating rate of 2 ℃/min, preserving heat for 1h, and cooling down to room temperature at a cooling rate of 2.5 ℃/min.
Example 5
Referring to fig. 1-4, the method for preparing the heat dissipation shell of the oxygen sensor for the pilot mask of the embodiment comprises the following operation steps:
s1, preparing modified silane
Weighing the following components in parts by weight: 120g of tetraethoxysilane, 50g of diphenyl dimethoxy silane, 20g of methylphenyl dimethoxy silane, 50g of dimethyl diethoxy silane, 150g of 5mol/L hydrochloric acid, 400g of toluene and 80g of n-butanol are added into a three-neck flask, the temperature of the three-neck flask is increased to 80 ℃ and reacted for 3 hours, n-butylamine is added into the three-neck flask in a dropwise manner to adjust the pH=7 of the system, and liquid separation is carried out;
transferring the organic phase into a three-neck flask with a water separator, stirring, increasing the temperature of the three-neck flask to 125 ℃, reacting for 3 hours, separating water generated by the reaction through the water separator in the reaction process, reducing the temperature of the three-neck flask to 90 ℃ after the reaction is completed, and evaporating the solvent under reduced pressure to obtain the modified silane.
S2, preparing modified resin solution
Weighing the following components in parts by weight: 500g of p-phenylphenol, 500g of formaldehyde aqueous solution with the mass concentration of 37% and 20g of calcium hydroxide are added into a three-neck flask, the temperature of the three-neck flask is increased to 80 ℃, the three-neck flask reacts for 60min, 200g of boric acid is added into the three-neck flask, the temperature of the three-neck flask is increased to 115 ℃, the three-neck flask reacts for 3h, 200g of modified silane is added into the three-neck flask, the three-neck flask is stirred for 60min, the three-neck flask is kept at 115 ℃ after the stirring is completed, the solvent is distilled off under reduced pressure, the three-neck flask is cooled to room temperature, the modified resin is obtained, the three-neck flask is added with ethanol with the same mass as the modified resin, the three-neck flask is heated to 60 ℃, the three-neck flask is stirred for 2h, and the three-neck flask is cooled to room temperature, and 50wt% of modified resin solution is obtained.
S3, preparing pretreated carbon fiber
Selecting chopped carbon fiber with the diameter of 6 mu m and the length of 1-2mm produced by Jiangsu Chuangyu carbon fiber technology Co., ltd as a carbon fiber raw material;
uniformly mixing acetone and ethanol according to a volume ratio of 1:1 to obtain a mixed solution;
weighing the following components in parts by weight: adding 100g of carbon fiber and 500g of mixed solution into a beaker, uniformly mixing, placing the beaker into an ultrasonic disperser with the temperature of 120W and 40kHz, carrying out ultrasonic treatment for 90min, carrying out suction filtration, leaching a filter cake with purified water, transferring to a drying oven with the temperature of 85 ℃, and drying for 12h to obtain dried carbon fiber;
spreading the dried carbon fiber on a heating plate with the temperature of 240 ℃, covering a metal cover plate on the upper surface of the carbon fiber, applying pressure of 1.5MPa on the metal cover plate, and carrying out heat preservation and hot pressing for 60min to obtain the pretreated carbon fiber.
S4, preparing carbon foam
Melamine foam produced by Zhengzhou Fengtai nanometer materials is selected as a raw material,
cutting melamine foam into required shape and size, cleaning the melamine foam with absolute ethyl alcohol and purified water, transferring the cleaned melamine foam into a drying oven with the temperature of 80 ℃, drying the melamine foam for 18 hours, placing the melamine foam into a muffle furnace protected by nitrogen, raising the temperature of the muffle furnace to 1000 ℃ at the heating rate of 5 ℃/min, preserving the heat for 2 hours, and reducing the muffle furnace to room temperature under the protection of nitrogen to obtain the carbon foam.
S5, preparing dispersion liquid
Weighing the following components in parts by weight: adding 80g of pretreated carbon fiber, 64g of carbon foam, 160g of 3-aminopropyl triethoxysilane and 480g of water into a beaker, stirring, adding 5mol/L hydrochloric acid into the beaker at room temperature, adjusting the pH value of the system to be=5, raising the temperature of the beaker to 85 ℃, reacting for 3 hours, carrying out suction filtration, eluting a filter cake by purified water and ethanol in sequence, transferring to a drying box with the temperature of 65 ℃, and drying for 6 hours to obtain mixed powder;
weighing the following components in parts by weight: 30g of mixed powder and 150g of absolute ethyl alcohol are added into a beaker, stirred for 10min, then transferred into a 120W ultrasonic disperser with 40kHz ultrasonic disperser, and ultrasonic treated for 160min to obtain dispersion liquid.
S6, preparing composite resin
Weighing the following components in parts by weight: 800g of modified resin solution and 240g of dispersion liquid are added into a three-neck flask, the rotating speed is set to be 550r/min, stirring is carried out for 50min, the temperature of the three-neck flask is increased to 70 ℃, and the solvent is distilled off under reduced pressure, so that the composite resin is obtained.
S7, preparing an initial product of the heat dissipation shell of the oxygen sensor
Adding the composite resin into a cavity of an oxygen sensor heat dissipation shell forming mold, filling the cavity, transferring the mold into a baking oven with the temperature of 100 ℃ for drying for 12 hours, and removing the mold outside the mold to obtain an oxygen sensor heat dissipation shell primary product.
S8, preparing a finished product of the heat dissipation shell of the oxygen sensor
Placing the primary product of the heat dissipation shell of the oxygen sensor into a muffle furnace, filling nitrogen into the muffle furnace, enabling the nitrogen to fill the inner cavity of the muffle furnace, heating up to 200 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 500 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 600 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating up to 700 ℃ at a heating rate of 2 ℃/min, preserving heat for 1h, and cooling down to room temperature at a cooling rate of 2.5 ℃/min.
Comparative example 1
The present comparative example differs from example 5 in that no modified silane was added to the modified resin solution prepared in step S2.
Comparative example 2
The present comparative example differs from example 5 in that the dispersion in step S6 was replaced by an equal amount of a mixed powder composed of 22.2g of carbon fibers and 17.8g of carbon foam.
Comparative example 3
The present comparative example differs from example 5 in that step S8 is eliminated.
Performance test:
the heat insulating property, electromagnetic shielding property and mechanical property of the oxygen sensor heat radiation housing finished product prepared by examples 3 to 5 and comparative examples 1 to 3 were tested, wherein the heat insulating property was measured by a heat flow meter method for measuring steady state thermal resistance and related properties of heat insulating materials according to the standard GB/T10295-2008, the electromagnetic shielding property was measured by a shielding effectiveness measuring method for planar electromagnetic shielding materials according to the standard GB/T30142-2013, the mechanical property was measured by a compressive strength of a sample according to the standard GB/T8813-2020 rigid foam compression property and a tensile strength of a sample according to the standard GB/T6344-2008 soft foam tensile strength and elongation at break were measured, and specific test results are shown in the following table:
data analysis:
the heat dissipation shell of the oxygen sensor for the pilot mask, which is prepared by the invention, not only effectively improves the heat insulation performance, tensile strength and compressive strength of the heat dissipation shell, but also effectively shields the interference of external electromagnetic fields and improves the detection precision of the oxygen sensor.
The foregoing is merely illustrative and explanatory of the invention, as it is well within the scope of the invention as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the invention as defined in the accompanying claims.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (7)
1. The utility model provides an oxygen sensor heat dissipation shell for pilot's face guard, includes bottom open-ended cylindric casing (100), its characterized in that, the outside cover of casing (100) is equipped with shell (200), be equipped with storage cavity (201) between shell (200) and casing (100), storage cavity (201) intussuseption is filled with fine silica aerogel, a plurality of louvres (101) have been seted up to the top outer wall of casing (100), the inboard of casing (100) is equipped with spacing ring (300) of two level settings, two the outer wall of spacing ring (300) all is through a plurality of connecting blocks (301) and the inner wall rigid coupling of casing (100), and two the inside wall of spacing ring (300) has all been seted up a plurality of spacing draw-in grooves (302), and oxygen sensor is installed to two spacing ring (300) inner circle, and the outside cover of oxygen sensor establishes the spacing fixture block with spacing draw-in groove (302) mutually supporting;
the oxygen sensor heat dissipation shell is obtained by pouring and molding composite resin through an oxygen sensor heat dissipation shell molding die and then carbonizing at a high temperature;
the composite resin is prepared by the following steps:
s1, adding p-phenylphenol, formaldehyde aqueous solution and a catalyst into a three-neck flask, stirring, raising the temperature of the three-neck flask to 70-80 ℃, reacting for 0.5-1h, adding boric acid into the three-neck flask, raising the temperature of the three-neck flask to 105-115 ℃, reacting for 2-3h, adding modified silane into the three-neck flask, stirring for 40-60min, and performing post treatment to obtain a modified resin solution;
s2, carrying out dispersion treatment on the pretreated carbon fibers and the carbon foam, and uniformly dispersing the pretreated carbon fibers and the carbon foam in an ethanol solution to obtain a dispersion liquid;
s3, adding the modified resin solution and the dispersion liquid into a three-neck flask according to the weight ratio of 10:3, setting the rotating speed to be 450-550r/min, stirring for 40-50min, increasing the temperature of the three-neck flask to 60-70 ℃, and evaporating solvent ethanol under reduced pressure to obtain the composite resin.
2. The oxygen sensor heat dissipation shell for the pilot mask according to claim 1, wherein a mounting ring (400) is arranged at the top of the shell (100), clamping columns (401) are fixedly connected to two ends of the top of the mounting ring (400), internal threads are arranged on the inner side of the mounting ring (400), and external threads (402) matched with the internal threads are arranged on the outer ring of the top of the shell (100).
3. The oxygen sensor heat dissipation housing for a pilot's face mask of claim 1, wherein the weight ratio of p-phenylphenol, aqueous formaldehyde solution, catalyst, boric acid and modified silane is 5:5:0.2:2:2, the mass concentration of the aqueous formaldehyde solution is 37%, and the catalyst is any one of sodium hydroxide, ammonium hydroxide, calcium hydroxide, and ethylamine.
4. The oxygen sensor heat sink housing for a pilot's mask of claim 1, wherein the modified silane processing step comprises:
a1, adding tetraethoxysilane, diphenyl dimethoxy silane, methylphenyl dimethoxy silane, dimethyl diethoxy silane, hydrochloric acid, toluene and n-butanol into a three-neck flask according to a weight ratio of 12:5:2:5:15:40:8, stirring, heating the three-neck flask to 70-80 ℃, reacting for 2-3 hours, dropwise adding n-butylamine into the three-neck flask, regulating the pH=7 of the system, and separating liquid;
a2, transferring the organic phase into a three-neck flask with a water separator, stirring, raising the temperature of the three-neck flask to 115-125 ℃, reacting for 2-3h, lowering the temperature of the three-neck flask to 85-90 ℃, and evaporating the solvent under reduced pressure to obtain the modified silane.
5. The pilot mask oxygen sensor heat sink housing of claim 4, wherein the pre-treatment carbon fiber machining operation comprises:
b1, uniformly mixing acetone and ethanol according to a volume ratio of 1:1 to obtain a mixed solution, adding chopped carbon fibers with a diameter of 6 mu m and the mixed solution into a beaker according to a weight ratio of 1:5 to uniformly mix, placing the beaker into an ultrasonic disperser with a speed of 120W and a speed of 40kHz, performing ultrasonic treatment for 60-90min, performing suction filtration, leaching a filter cake with purified water, transferring the filter cake into a drying oven with a temperature of 75-85 ℃, and drying for 10-12h to obtain dried carbon fibers;
and B2, spreading the dried carbon fibers on a heating plate with the temperature of 200-240 ℃, covering a metal cover plate on the upper surface of the carbon fibers, applying pressure of 0.5-1.5MPa to the metal cover plate, and carrying out heat preservation and hot pressing for 40-60min to obtain the pretreated carbon fibers.
6. The oxygen sensor heat sink housing for a pilot's mask of claim 1, wherein the carbon foam is prepared by the method of: the preparation method comprises the steps of taking melamine foam as a raw material, cutting the melamine foam into a required shape and size, cleaning the melamine foam with absolute ethyl alcohol and purified water, transferring the cleaned melamine foam into a drying oven with the temperature of 70-80 ℃, drying the melamine foam for 15-18h, placing the melamine foam into a muffle furnace protected by nitrogen, raising the temperature of the muffle furnace to 900-1000 ℃ at the heating rate of 5 ℃/min, preserving the temperature of the muffle furnace for 2h, and reducing the muffle furnace to room temperature under the protection of nitrogen to obtain the carbon foam.
7. The pilot mask oxygen sensor heat sink housing of claim 1 wherein the dispersion process operates as: adding pretreated carbon fiber, carbon foam, 3-aminopropyl triethoxysilane and water into a beaker according to a weight ratio of 1:0.8:2:6, stirring, adding 5mol/L hydrochloric acid into the beaker at room temperature, adjusting pH=4-5 of the system, raising the temperature of the beaker to 75-85 ℃, reacting for 2-3 hours, carrying out suction filtration, sequentially eluting a filter cake by purified water and ethanol, transferring the filter cake into a drying oven with a temperature of 55-65 ℃ and drying for 4-6 hours to obtain mixed powder, adding the mixed powder and absolute ethanol into the beaker according to a weight ratio of 1:5, stirring for 10 minutes, transferring the mixed powder into an ultrasonic disperser with a temperature of 120W and 40kHz, and carrying out ultrasonic treatment for 120-160 minutes to obtain a dispersion liquid.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105813443A (en) * | 2016-05-24 | 2016-07-27 | 海安县申菱电器制造有限公司 | Radiator used for electronic component and manufacturing method for heat pipe of radiator |
| CN106704926A (en) * | 2015-11-12 | 2017-05-24 | 深圳市利思达光电科技有限公司 | Engine type hoisting LED lamp with good heat dissipation performance |
| CN111269020A (en) * | 2020-03-14 | 2020-06-12 | 青岛少氏基业科技服务平台有限公司 | Vacuum diffusion welding method for protective layer of miniature high-temperature oxygen concentration sensor |
| CN113043680A (en) * | 2021-04-21 | 2021-06-29 | 广东创辉鑫材科技股份有限公司 | High-heat-dissipation aluminum-based copper-clad plate |
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| EP1121959A1 (en) * | 2000-02-01 | 2001-08-08 | Optrel Ag | Emergency flight safety device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704926A (en) * | 2015-11-12 | 2017-05-24 | 深圳市利思达光电科技有限公司 | Engine type hoisting LED lamp with good heat dissipation performance |
| CN105813443A (en) * | 2016-05-24 | 2016-07-27 | 海安县申菱电器制造有限公司 | Radiator used for electronic component and manufacturing method for heat pipe of radiator |
| CN111269020A (en) * | 2020-03-14 | 2020-06-12 | 青岛少氏基业科技服务平台有限公司 | Vacuum diffusion welding method for protective layer of miniature high-temperature oxygen concentration sensor |
| CN113043680A (en) * | 2021-04-21 | 2021-06-29 | 广东创辉鑫材科技股份有限公司 | High-heat-dissipation aluminum-based copper-clad plate |
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