CN114836037A - Silica gel foaming material with heat conduction performance and preparation method thereof - Google Patents
Silica gel foaming material with heat conduction performance and preparation method thereof Download PDFInfo
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- CN114836037A CN114836037A CN202210637897.3A CN202210637897A CN114836037A CN 114836037 A CN114836037 A CN 114836037A CN 202210637897 A CN202210637897 A CN 202210637897A CN 114836037 A CN114836037 A CN 114836037A
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- silica gel
- agent
- foaming
- oxide
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000000741 silica gel Substances 0.000 title claims abstract description 58
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 58
- 238000005187 foaming Methods 0.000 title claims abstract description 52
- 239000000463 material Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 31
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 27
- 239000003063 flame retardant Substances 0.000 claims abstract description 18
- 239000004088 foaming agent Substances 0.000 claims abstract description 17
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 7
- 239000011231 conductive filler Substances 0.000 claims abstract description 3
- 239000012528 membrane Substances 0.000 claims description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000004964 aerogel Substances 0.000 claims description 18
- 238000001179 sorption measurement Methods 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 239000002134 carbon nanofiber Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 229920002379 silicone rubber Polymers 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 239000006261 foam material Substances 0.000 claims description 8
- 239000004945 silicone rubber Substances 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- NUHSROFQTUXZQQ-UHFFFAOYSA-N isopentenyl diphosphate Chemical compound CC(=C)CCO[P@](O)(=O)OP(O)(O)=O NUHSROFQTUXZQQ-UHFFFAOYSA-N 0.000 claims description 6
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910052582 BN Inorganic materials 0.000 claims description 3
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical group C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- -1 alcohol compound Chemical class 0.000 claims description 3
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 3
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000005886 esterification reaction Methods 0.000 claims description 3
- HIHIPCDUFKZOSL-UHFFFAOYSA-N ethenyl(methyl)silicon Chemical compound C[Si]C=C HIHIPCDUFKZOSL-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 239000003112 inhibitor Substances 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 229920002050 silicone resin Polymers 0.000 claims description 3
- 239000012258 stirred mixture Substances 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 239000004604 Blowing Agent Substances 0.000 claims description 2
- 229920002323 Silicone foam Polymers 0.000 claims description 2
- 239000013514 silicone foam Substances 0.000 claims description 2
- 239000003607 modifier Substances 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005804 alkylation reaction Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229910021392 nanocarbon Inorganic materials 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229920001821 foam rubber Polymers 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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Abstract
The invention discloses a silica gel foaming material with heat conductivity and a preparation method thereof, relating to the technical field of silica gel foaming materials and comprising the following components: 100 parts of organic silica gel, 20-30 parts of reinforcing agent, 0.2-0.5 part of vulcanizing agent, 2-8 parts of foaming agent, 2-5 parts of auxiliary foaming agent, 0-10 parts of regulator, 10-20 parts of flame retardant, 2-5 parts of carbon nano tube high thermal conductive filler and 2-5 parts of nano oxide. The carbon nano tubes have good heat transfer performance, and the CNTs have very large length-diameter ratio, so that the heat exchange performance along the length direction of the carbon nano tubes is very high, the heat exchange performance in the vertical direction of the carbon nano tubes is relatively low, the carbon nano tubes can synthesize a high-anisotropy heat transfer material through proper orientation, in addition, the carbon nano tubes have high heat conductivity, trace carbon nano tubes are doped in the silica gel foaming material, and the heat conductivity of the silica gel foaming material is greatly improved.
Description
Technical Field
The invention relates to the technical field of silica gel foaming materials, in particular to a silica gel foaming material with heat conductivity and a preparation method thereof.
Background
The foaming silica gel is a double-component heating vulcanized silicone rubber which is white or skin color oily liquid and becomes a soft elastic material after vulcanization, and the foaming volume is 3-4 times of the original volume; can be used for manufacturing flexible silicon rubber products such as human bodies, insoles, shoulder pads, patches, non-slip mats and the like.
The silica gel foaming material in the prior art generally has no high temperature resistance and poor heat conduction performance, and cannot resist high temperature for a long time after molding, so that deformation is generated, and therefore, the silica gel foaming material with the heat conduction performance needs to be designed to solve the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a silica gel foaming material with heat conductivity and a preparation method thereof. The silica gel foaming material has the advantage of high heat conductivity.
In order to achieve the purpose, the invention adopts the following technical scheme:
a silica gel foaming material with thermal conductivity comprises the following components: 100 parts of organic silica gel, 20-30 parts of reinforcing agent, 0.2-0.5 part of vulcanizing agent, 2-8 parts of foaming agent, 2-5 parts of auxiliary foaming agent, 0-10 parts of regulator, 10-20 parts of flame retardant, 2-5 parts of carbon nano tube high thermal conductive filler and 2-5 parts of nano oxide.
Through the technical scheme: the carbon nano tube has good heat transfer performance, the CNTs have very large length-diameter ratio, so that the heat exchange performance along the length direction is very high, the heat exchange performance in the vertical direction is relatively low, the carbon nano tube can synthesize a high-anisotropy heat conduction material through proper orientation, in addition, the carbon nano tube has high heat conductivity, trace carbon nano tubes are doped in the silica gel foaming material, and the heat conductivity of the silica gel foaming material is greatly improved.
The invention is further set that the organic silica gel is one or more of vinyl silicone oil, methyl vinyl silicone rubber and methyl phenyl silicone resin.
Through the technical scheme: the organic silicon product takes silicon-oxygen (Si-O) bond as a main chain structure, the bond energy of the C-C bond is 82.6 kilocalories per gram molecule, and the bond energy of the Si-O bond is 121 kilocalories per gram molecule in the organic silicon, so the organic silicon product has high thermal stability, the chemical bond of the molecule is not broken and not decomposed at high temperature (or radiation irradiation), the organic silicon can resist high temperature and low temperature, can be used in a wide temperature range, and has little change along with the temperature no matter the chemical property or the physical and mechanical property, thereby the organic silicon gel has better foaming effect.
The invention is further provided that the co-blowing agent is one or more of a curing agent, a catalyst and a crosslinking inhibitor.
Through the technical scheme: the auxiliary foaming agent is adopted to foam rubber and plastic, so that the effects of increasing the foaming multiplying power, reducing the specific gravity of the product, improving the quality of the product and obviously improving the specific gravity and elasticity of the product are achieved.
The invention is further provided that the vulcanizing agent is benzoyl peroxide or di-p-chlorobenzoyl peroxide.
Through the technical scheme: the vulcanizing agent enables the linear molecular structure of the rubber to become a three-dimensional net-shaped mechanism through the 'bridging' of the vulcanizing agent, so that the mechanical and physical properties of the rubber are obviously improved.
The invention is further configured that the nano-oxide comprises at least one of iron oxide, cerium oxide, magnesium oxide, titanium oxide and zinc oxide.
Through the technical scheme: the nano oxide can improve the performances of thermal aging resistance, thermal stability and the like of the foaming material.
The invention further provides that the regulator is an alcohol compound containing at least two hydroxyl groups in the molecule.
Through the technical scheme: the addition of the regulator can realize flexible regulation and control of the density, size and distribution of the foam pores of the silicon rubber foam material, and meet the special requirements of different application fields on the foam material.
The method is further set as that the flame retardant is prepared by introducing propylene gas under the condition of stirring in a reaction kettle, introducing steam into a jacket of the reaction kettle, keeping the temperature at 105-115 ℃, then introducing a catalyst to carry out esterification reaction to obtain IPPP crude ester, finally distilling the IPPP crude ester for multiple times, condensing the water which is firstly distilled at 100 ℃, then entering a dehydration tank through a tube array condenser, condensing low-boiling-point substances which are distilled at 145 ℃ of 135-.
Through the technical scheme: in the alkylation reaction process, propylene gas is introduced under the condition of stirring of the reaction kettle, steam is introduced into the jacket of the reaction kettle, the temperature in the reaction kettle can be stably and effectively maintained at 105-115 ℃, the temperature range can effectively separate water, and the flame retardant is added to effectively improve the flame retardant effect of the silica gel foaming material.
The invention is further set that the carbon nano tube heat conduction filler is one or more of boron nitride, aluminum oxide, gold powder and silver powder.
The invention further provides a silica gel foaming base layer, wherein a carbon nanofiber membrane is bonded on the surface of the silica gel foaming base layer through an adhesive, an active carbon adsorption membrane is bonded on the outer surface of the carbon nanofiber membrane, and an aerogel membrane is bonded on the outer surface of the active carbon adsorption membrane.
Through the technical scheme: the carbon nanofiber membrane can reduce the generation of static electricity and effectively block and shield strong electromagnetism; the active carbon adsorption film is nano active carbon fiber, contains oxygen groups in the active carbon adsorption film and has a micropore structure, so that the active carbon adsorption film is beneficial to adsorbing harmful substances or moisture in the air and realizes the aim of purifying the air; the aerogel film is nano aerogel, can greatly improve the high temperature resistance of the adhesive layer, can bear the high temperature of about 1000 ℃ in a short time, and reduces the aging and embrittlement effects of the adhesive layer.
The invention is further set that the adhesive is a high temperature resistant adhesive, and the material is formed by mixing phenolic aldehyde-nitrile adhesive, silicon-oxygen bond and nano aerogel.
Through the technical scheme: can effectively improve the stability among the silica gel foaming base layer, the nano carbon fiber film, the nano activated carbon fiber and the aerogel film.
A preparation method of a silica gel foaming material with heat conductivity comprises the following steps:
s1: firstly, 100 parts of organic silica gel, 20-30 parts of reinforcing agent, 0.2-0.5 part of vulcanizing agent, 2-8 parts of foaming agent, 2-5 parts of auxiliary foaming agent, 0-10 parts of regulator, 10-20 parts of flame retardant, 2-5 parts of carbon nano tube high-thermal-conductivity filler and 2-5 parts of nano oxide are mixed to form a mixture;
s2: stirring the mixture under a vacuum condition, and heating to 30-50 ℃ until the mixture is uniformly stirred;
s3: then putting the uniformly stirred mixture into a mould for cooling and forming to form a silica gel foaming base layer;
s4: finally, sequentially bonding the carbon nanofiber membrane, the activated carbon adsorption membrane and the aerogel membrane on the silica gel foaming base layer through adhesives, and baking and shaping after bonding
The invention has the beneficial effects that:
1. the silica gel foaming material with the heat conduction performance has good heat conduction performance by being provided with the carbon nano tube high heat conduction filler, CNTs have very large length-diameter ratio, so that the heat exchange performance of the carbon nano tube foaming material along the length direction is very high, the heat exchange performance of the opposite vertical direction is lower, the carbon nano tube can synthesize a high-anisotropy heat conduction material through proper orientation, in addition, the carbon nano tube has higher heat conductivity, trace carbon nano tubes are doped in the silica gel foaming material, and the heat conductivity of the silica gel foaming material is greatly improved.
2. The silica gel foaming material with the heat conducting property and the carbon nanofiber membrane can reduce the generation of static electricity and effectively block and shield strong electromagnetism; the active carbon adsorption film is nano active carbon fiber, contains oxygen groups in the active carbon adsorption film and has a micropore structure, so that the active carbon adsorption film is beneficial to adsorbing harmful substances or moisture in the air and realizes the aim of purifying the air; the aerogel film is nano aerogel, can greatly improve the high temperature resistance of the adhesive layer, can bear the high temperature of about 1000 ℃ in a short time, and reduces the aging and embrittlement effects of the adhesive layer.
3. This silica gel expanded material with heat conductivity, through being provided with the fire retardant, at alkylation reaction's in-process, let in propylene gas under the condition of reation kettle stirring, let in steam in reation kettle presss from both sides the cover, can stabilize effectual temperature that makes in the reation kettle and maintain 105 ~ 115 ℃, this temperature range can effectually come out moisture separation, the effectual flame retardant efficiency who improves silica gel expanded material of addition of this fire retardant.
Drawings
Fig. 1 is a schematic structural diagram of a silicone foam material with thermal conductivity according to the present invention.
In the figure: 1. a silica gel foaming base layer; 2. a carbon nanofiber membrane; 3. an activated carbon adsorption film; 4. aerogel films.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1, a silicone rubber foam material with thermal conductivity comprises the following components: 100 parts of organic silica gel, 20-30 parts of reinforcing agent, 0.2-0.5 part of vulcanizing agent, 2-8 parts of foaming agent, 2-5 parts of auxiliary foaming agent, 0-10 parts of regulator, 10-20 parts of flame retardant, 2-5 parts of carbon nanotube high-thermal-conductivity filler and 2-5 parts of nano oxide, wherein the carbon nanotubes have good heat transfer performance, CNTs have very large length-diameter ratio, so that the heat exchange performance along the length direction is very high, the heat exchange performance in the vertical direction is relatively low, and the carbon nanotubes can synthesize a high-anisotropy heat-conduction material through proper orientation.
Specifically, the organic silica gel is one or more of vinyl silicone oil, methyl vinyl silicone rubber and methyl phenyl silicone resin, the organic silicon product is in a main chain structure with silicon-oxygen (Si-O) bonds, the bond energy of the C-C bonds is 82.6 kilocalories/gram molecule, and the bond energy of the Si-O bonds is 121 kilocalories/gram molecule in the organic silicon, so that the heat stability of the organic silicon product is high, the chemical bonds of molecules are not broken and decomposed at high temperature (or radiation irradiation), the organic silicon can resist high temperature and low temperature, can be used in a wide temperature range, and has small change along with the temperature no matter the chemical property or the physical and mechanical property, and the foaming effect by adopting the organic silica gel is better.
Specifically, the auxiliary foaming agent is one or more of a curing agent, a catalyst and a crosslinking inhibitor, and the auxiliary foaming agent is adopted to foam rubber and plastic, so that the effects of increasing the foaming multiplying power, reducing the specific gravity of the product, improving the quality of the product and obviously improving the specific gravity and elasticity of the product are achieved.
Specifically, the vulcanizing agents are benzoyl peroxide and di-p-chlorobenzoyl peroxide, and the linear molecular structure of the rubber is changed into a three-dimensional net-shaped mechanism through the bridging of the vulcanizing agents, so that the mechanical and physical properties of the rubber are obviously improved.
Specifically, the nano oxide comprises at least one of iron oxide, cerium oxide, magnesium oxide, titanium oxide and zinc oxide, and the nano oxide can improve the performances of heat aging resistance, heat stability and the like of the foaming material.
Specifically, the regulator is an alcohol compound with at least two hydroxyl groups in the molecule, and the addition of the regulator can realize flexible regulation and control of the density, size and distribution of the foam pores of the silicone rubber foam material, and meet special requirements of different application fields on the foam material.
Specifically, the flame retardant is prepared by introducing propylene gas under the condition of stirring in a reaction kettle, introducing steam into a jacket of the reaction kettle, keeping the temperature at 105-115 ℃, introducing a catalyst for esterification to obtain IPPP crude ester, distilling the IPPP crude ester for multiple times, condensing the water distilled out at the first temperature of 100 ℃ through a tube array condenser, then introducing the water into a dehydration tank, condensing the low-boiling-point substances distilled out at the temperature of 145 ℃ through a tube array condenser, introducing the low-boiling-point substances condensed through the tube array condenser into a low-boiling-point substance collection tank, distilling out about 245 ℃ and 255 ℃ to obtain middle distillate, cooling and condensing the middle distillate through the tube array condenser, introducing the propylene gas under the condition of stirring in the reaction kettle in the alkylation reaction process, introducing the steam into the jacket of the reaction kettle, stably and effectively keeping the temperature in the reaction kettle at 105-115 ℃, the temperature range can effectively separate out moisture, and the flame retardant is added to effectively improve the flame retardant effect of the silica gel foam material.
Specifically, the carbon nanotube heat-conducting filler is one or more of boron nitride, aluminum oxide, gold powder and silver powder, and further comprises a silica gel foaming base layer 1, wherein a carbon nanofiber membrane 2 is bonded on the surface of the silica gel foaming base layer 1 through an adhesive, an activated carbon adsorption membrane 3 is bonded on the outer surface of the carbon nanofiber membrane 2, an aerogel membrane 4 is bonded on the outer surface of the activated carbon adsorption membrane 3, and the carbon nanofiber membrane 2 not only can reduce the generation of static electricity, but also can effectively block and shield strong electromagnetism; the active carbon adsorption film 3 is a nano active carbon fiber, contains oxygen groups in the interior and has a micropore structure, so that the active carbon adsorption film is beneficial to adsorbing harmful substances or moisture in the air and realizes the aim of purifying the air; the aerogel film 4 is nano aerogel, can greatly improve the high temperature resistance of the adhesive layer, can bear the high temperature of about 1000 ℃ in a short time, and reduces the aging and embrittlement effects of the adhesive layer.
Specifically, the adhesive is a high-temperature-resistant adhesive, the material is formed by mixing phenolic aldehyde-butyronitrile glue, silicon-oxygen bonds and nano aerogel, and the stability among the silica gel foaming base layer 1, the nano carbon fiber membrane 2, the nano activated carbon fiber 3 and the aerogel membrane 4 can be effectively improved.
A preparation method of a silica gel foaming material with heat conductivity comprises the following steps:
s1: firstly, 100 parts of organic silica gel, 20-30 parts of reinforcing agent, 0.2-0.5 part of vulcanizing agent, 2-8 parts of foaming agent, 2-5 parts of auxiliary foaming agent, 0-10 parts of regulator, 10-20 parts of flame retardant, 2-5 parts of carbon nano tube high-thermal-conductivity filler and 2-5 parts of nano oxide are mixed to form a mixture;
s2: stirring the mixture under a vacuum condition, and heating to 30-50 ℃ until the mixture is uniformly stirred;
s3: then putting the uniformly stirred mixture into a mould for cooling and forming to form a silica gel foaming base layer;
s4: finally, the nano carbon fiber film, the activated carbon adsorption film and the aerogel film are sequentially bonded on the silica gel foaming base layer through adhesives, and baking and shaping are carried out after bonding is finished.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The silica gel foaming material with the thermal conductivity is characterized by comprising the following components: 100 parts of organic silica gel, 20-30 parts of reinforcing agent, 0.2-0.5 part of vulcanizing agent, 2-8 parts of foaming agent, 2-5 parts of co-foaming agent, 0-10 parts of regulator, 10-20 parts of flame retardant, 2-5 parts of carbon nano tube high thermal conductivity filler and 2-5 parts of nano oxide.
2. The silicone foam material with thermal conductivity according to claim 1, wherein the silicone is one or more of vinyl silicone oil, methyl vinyl silicone rubber, and methyl phenyl silicone resin.
3. The silicone rubber foam material with thermal conductivity according to claim 2, wherein the co-blowing agent is one or more of a curing agent, a catalyst and a crosslinking inhibitor.
4. The silicone rubber foam material with thermal conductivity as claimed in claim 3, wherein the vulcanizing agent is benzoyl peroxide or bis-p-chlorobenzoyl peroxide.
5. The silica gel foaming material with thermal conductivity according to claim 4, wherein the nano oxide comprises at least one of iron oxide, cerium oxide, magnesium oxide, titanium oxide and zinc oxide.
6. The foamed silica gel material with thermal conductivity of claim 5, wherein the modifier is an alcohol compound having at least two hydroxyl groups in the molecule.
7. The silica gel foaming material with the heat conductivity as claimed in claim 6, wherein the flame retardant is obtained by introducing propylene gas while stirring in a reaction kettle, introducing steam into a jacket of the reaction kettle, maintaining the temperature at 105-115 ℃, then introducing a catalyst to perform an esterification reaction to obtain crude IPPP, and finally distilling the crude IPPP for a plurality of times, wherein the water is firstly distilled at 100 ℃, the water is condensed by a tube array condenser and then enters a dehydration tank, then the low-boiling-point substances are sequentially distilled at 135-145 ℃, the low-boiling-point substances are condensed by the tube array condenser and then enter a low-boiling-point substance collection tank, the middle distillate is distilled at about 245-255 ℃, the middle distillate is cooled and condensed by the tube array condenser and enters a middle distillate collection tank, and the flame retardant is distilled at about 295-305 ℃.
8. The silica gel foaming material with thermal conductivity according to claim 7, wherein the carbon nanotube thermal conductive filler is one or more of boron nitride, aluminum oxide, gold powder and silver powder.
9. The silica gel foaming material with the thermal conductivity as claimed in claim 8, further comprising a silica gel foaming base layer (1), wherein the carbon nanofiber membrane (2) is bonded on the surface of the silica gel foaming base layer (1) through an adhesive, the activated carbon adsorption membrane (3) is bonded on the outer surface of the carbon nanofiber membrane (2), the aerogel membrane (4) is bonded on the outer surface of the activated carbon adsorption membrane (3), the adhesive layer is a high temperature resistant adhesive, and the material is formed by mixing phenolic aldehyde-nitrile adhesive, silicon oxygen bond and nano aerogel.
10. A preparation method of a silica gel foaming material with heat conduction performance is characterized by comprising the following steps:
s1: firstly, 100 parts of organic silica gel, 20-30 parts of reinforcing agent, 0.2-0.5 part of vulcanizing agent, 2-8 parts of foaming agent, 2-5 parts of auxiliary foaming agent, 0-10 parts of regulator, 10-20 parts of flame retardant, 2-5 parts of carbon nano tube high-thermal-conductivity filler and 2-5 parts of nano oxide are mixed to form a mixture;
s2: stirring the mixture under a vacuum condition, and heating to 30-50 ℃ until the mixture is uniformly stirred;
s3: then putting the uniformly stirred mixture into a mould for cooling and forming to form a silica gel foaming base layer (1);
s4: and finally, sequentially bonding the carbon nanofiber membrane (2), the activated carbon adsorption membrane (3) and the aerogel membrane (4) on the silica gel foaming base layer (1) through adhesives, and baking and shaping after bonding.
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