CN115678124A - Natural rubber composite material for rubber support of heavy truck leaf spring and application thereof - Google Patents
Natural rubber composite material for rubber support of heavy truck leaf spring and application thereof Download PDFInfo
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- CN115678124A CN115678124A CN202211497909.3A CN202211497909A CN115678124A CN 115678124 A CN115678124 A CN 115678124A CN 202211497909 A CN202211497909 A CN 202211497909A CN 115678124 A CN115678124 A CN 115678124A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 52
- 239000005060 rubber Substances 0.000 title claims abstract description 52
- 244000043261 Hevea brasiliensis Species 0.000 title claims abstract description 49
- 229920003052 natural elastomer Polymers 0.000 title claims abstract description 49
- 229920001194 natural rubber Polymers 0.000 title claims abstract description 49
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical class N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000002135 nanosheet Substances 0.000 claims abstract description 41
- 239000006229 carbon black Substances 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 10
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 10
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 10
- 239000006185 dispersion Substances 0.000 claims abstract description 7
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 18
- 229920000877 Melamine resin Polymers 0.000 claims description 14
- 239000007900 aqueous suspension Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 14
- 239000013049 sediment Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 10
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- 239000011593 sulfur Substances 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 9
- HNWAHFPYJHAAJE-UHFFFAOYSA-N n-tert-butyl-1,3-benzothiazole-2-sulfonamide Chemical compound C1=CC=C2SC(S(=O)(=O)NC(C)(C)C)=NC2=C1 HNWAHFPYJHAAJE-UHFFFAOYSA-N 0.000 claims description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000008117 stearic acid Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000011787 zinc oxide Substances 0.000 claims description 9
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 claims description 8
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 8
- DECIPOUIJURFOJ-UHFFFAOYSA-N ethoxyquin Chemical compound N1C(C)(C)C=C(C)C2=CC(OCC)=CC=C21 DECIPOUIJURFOJ-UHFFFAOYSA-N 0.000 claims description 8
- UXKQNCDDHDBAPD-UHFFFAOYSA-N 4-n,4-n-diphenylbenzene-1,4-diamine Chemical compound C1=CC(N)=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 UXKQNCDDHDBAPD-UHFFFAOYSA-N 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000010992 reflux Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- ZRMMVODKVLXCBB-UHFFFAOYSA-N 1-n-cyclohexyl-4-n-phenylbenzene-1,4-diamine Chemical compound C1CCCCC1NC(C=C1)=CC=C1NC1=CC=CC=C1 ZRMMVODKVLXCBB-UHFFFAOYSA-N 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- FBBATURSCRIBHN-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyldisulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSCCC[Si](OCC)(OCC)OCC FBBATURSCRIBHN-UHFFFAOYSA-N 0.000 claims description 4
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000003963 antioxidant agent Substances 0.000 claims 1
- 230000003078 antioxidant effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 10
- 230000020169 heat generation Effects 0.000 abstract description 9
- 230000006835 compression Effects 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000010074 rubber mixing Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 17
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 7
- 239000012295 chemical reaction liquid Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910021392 nanocarbon Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- PKDCQJMRWCHQOH-UHFFFAOYSA-N triethoxysilicon Chemical compound CCO[Si](OCC)OCC PKDCQJMRWCHQOH-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention discloses a natural rubber composite material for a heavy truck plate spring rubber support and application thereof, wherein the natural rubber composite material comprises the following components in parts by weight: 75-85 parts of natural rubber, 15-25 parts of butadiene rubber, 3-10 parts of modified carbon nitride nanosheet, 85-105 parts of carbon black, 5-8 parts of an anti-aging agent, 5-10 parts of paraffin oil and 10-17 parts of a vulcanizing agent. The invention utilizes the synergistic effect of the modified carbon nitride nanosheet and the carbon black to form a unique nano dispersion structure in the natural rubber, so that the composite material has excellent mechanical property and aging resistance, has the characteristics of good mechanical property, excellent hot air aging resistance, low heat generation and small compression permanent deformation, and has better processing property and capability of reducing the energy consumption in the rubber mixing process.
Description
Technical Field
The invention belongs to the technical field of vehicle materials, and particularly relates to a natural rubber composite material for a heavy truck plate spring rubber support and application thereof.
Background
The heavy commercial vehicle is an important tool of current logistics, and with the rapid development of the transportation industry, the requirements on the smoothness and the driving comfort of the heavy commercial vehicle are continuously improved. A suspension system of a heavy commercial vehicle is an important part influencing the use performance and the comfort of the vehicle, and a plate spring rubber support is one of key parts determining the performance of the suspension system and directly influences the working performance of the suspension system. The heavy truck plate spring rubber support is generally formed by alternately placing and vulcanizing a plurality of layers of rubber and a plurality of layers of steel plates and is manufactured according to different laminated frameworks and processes so as to transfer horizontal shearing force. The rubber component is a key factor influencing the vibration damping performance of the plate spring rubber support, and the quality of the rubber component also influences the service life of the plate spring rubber support. The rubber support can cause the material to generate temperature rise in a dynamic working environment, and the temperature rise can cause the performance deterioration and the service life sharp reduction of the rubber material.
The rubber composite material applied to the plate spring support seat has the characteristics of good mechanical property, excellent hot air aging resistance, low heat generation and small compression permanent deformation. The excellent mechanical property is a precondition for ensuring the normal work of the support; the excellent aging resistance can ensure that the molecular structure of the rubber material is not greatly changed within a certain time, and better elasticity is maintained; the small permanent deformation can avoid the irreversible plastic deformation of the rubber material from influencing the vibration reduction performance of the product; since the support is exposed to a dynamic working environment for a long time, the heat generation in the dynamic process causes further deterioration of the material structure, and therefore, a rubber material having a low heat generation characteristic, especially, dynamic heat generation is also required. At present, the common plate spring rubber support in the market usually hardly meets the requirements at the same time, the service life is difficult to meet the market requirements, the fundamental reason is that the formula design is not reasonable enough, and the application and development of some new materials in the plate spring rubber support are laggard.
Disclosure of Invention
Aiming at the problem that the rubber material in the prior art is difficult to have the characteristics of good mechanical property, excellent hot air aging resistance, low heat generation and small compression permanent deformation, the invention provides the natural rubber composite material for the rubber support of the heavy truck leaf spring and the application thereof, and the use requirement of the rubber material for the rubber support of the leaf spring can be met.
The invention is realized by the following technical scheme:
a natural rubber composite material for a heavy truck plate spring rubber support comprises the following components in parts by weight: 75-85 parts of natural rubber, 15-25 parts of butadiene rubber, 3-10 parts of modified carbon nitride nanosheet, 85-105 parts of carbon black, 5-8 parts of an anti-aging agent, 5-10 parts of paraffin oil and 10-17 parts of a vulcanizing agent.
Further, the preparation method of the modified carbon nitride nanosheet comprises the following steps:
(1) Sealing melamine or urea by using aluminum foil paper, putting the melamine or urea into a muffle furnace, heating to 500-600 ℃ at the speed of 5-10 ℃/min, preserving heat for 3-4 h, naturally cooling to room temperature, and grinding a product to obtain graphitized carbon nitride;
(2) And (2) dispersing the graphitized carbon nitride in water, removing bottom sediment to obtain a water suspension of the graphitized carbon nitride nanosheet, drying the water suspension to remove part of water, concentrating, adding a silane coupling agent, stirring at 50 to 70 ℃ in an oil bath, refluxing and condensing, reacting for 3 to 6 hours, cooling to room temperature, mixing reaction liquid, centrifuging, taking the bottom sediment, and drying to obtain the modified carbon nitride nanosheet.
Further, the silane coupling agent in the step (2) is bis- [3- (triethoxysilyl) propyl ] tetrasulfide or bis- [3- (triethoxysilyl) propyl ] -disulfide; the mass ratio of the graphitized carbon nitride nanosheet to the silane coupling agent is 1.
Further, the dispersion in the step (2) is stirring and ultrasonic.
Further, the mass ratio of the carbon black N330 to the carbon black N762 is 1.
The anti-aging agent is more than one of N, N-diphenyl-p-phenylenediamine, N-phenyl-1-naphthylamine, 6-ethoxy-2, 4-trimethyl-1, 2-dihydroquinoline and N-cyclohexyl-N' -phenyl-p-phenylenediamine.
Further, the vulcanizing agents comprise: 5 to 8 portions of zinc oxide, 1.5 to 3.5 portions of stearic acid, 1.2 to 2 portions of 4,4' -dimorpholine disulfide, 0.8 to 1.5 portions of N-tertiary butyl-2-benzothiazole sulfonamide and 1.5 to 2 portions of sulfur.
In the invention, the natural rubber composite material is applied to the rubber support of the heavy truck plate spring.
The modified carbon nitride nanosheet is used as a filler, the silane-modified carbon nitride nanosheet has good interface compatibility with natural rubber (in the modification process, hydroxyl on the surface of graphitized carbon nitride reacts with silane of a silane coupling agent to form a covalent bond, and the coupling agent is connected to the surface of graphene, so that the interface compatibility between the carbon nitride nanosheet and organic natural rubber is effectively improved, the dispersion of a nanosheet layer in a natural rubber matrix is improved, the dispersion of the carbon nitride nanosheet in the natural rubber matrix can be improved, the interaction of the interface is further strengthened in the vulcanization process of the natural rubber, the mechanical property of the material is improved, and the effect of reducing heat generation is achieved; in addition, the nano carbon nitride sheet layer is a good blocking filler and can block the permeation and diffusion of oxygen, and some active groups on the nano carbon nitride sheet layer can capture free radicals and slow down the aging process of the natural rubber matrix material, so that the material is endowed with excellent aging resistance.
The vulcanizing agent in the invention is a vulcanizing agent of a sulfur vulcanizing system, so that the composite material has excellent elasticity, and the plastic deformation generated after compression is reduced. In addition, in the vulcanization process, a coupling agent containing sulfide on the surface of the modified carbon nitride nanosheet can react with the natural rubber to form a covalent bond, which is equivalent to that the silane coupling agent plays a role of a bridge between the natural rubber and the modified carbon nitride nanosheet. Therefore, a chemical interface which can form covalent bond combination between the modified carbon nitride nanosheet and the natural rubber matrix and a physical interface formed between the carbon black and the natural rubber matrix have a synergistic effect, and the material has a unique nano dispersion structure, so that the material has the characteristics of good mechanical property, excellent heat and air aging resistance, low heat generation and small compression permanent deformation.
All components in the natural rubber composite material can be mixed by traditional rubber processing equipment, such as an open mill and an internal mixer, and the mixed rubber obtained after mixing can be used as a plate spring rubber support material after high-temperature and high-pressure vulcanization; the tensile strength of the prepared natural rubber composite material is more than 18.0MPa, and the elongation at break is more than 400% (GB/T528); after being aged for 22 hours in hot air at 85 ℃, the compression permanent deformation is less than 25 percent (GB/T7759.1); after the hot air aging is carried out for 70 hours at 100 ℃, the Shore A hardness change is less than 5, the absolute value of the tensile strength change rate is less than 25%, and the absolute value of the elongation at break change rate is less than 30% (GB/T3512); the compression fatigue temperature rise is less than 30 ℃ (GB/T1687.3), and the rubber material can meet the use requirements of the rubber material for the plate spring rubber support.
Advantageous effects
(1) The natural rubber composite material can be processed by using the processing equipment of the traditional rubber composite material, but the processing performance is better, and the good processing performance can reduce the energy consumption in the rubber mixing process;
(2) The invention utilizes the synergistic effect of the modified carbon nitride nanosheet and the carbon black to form a unique nano dispersion structure in the natural rubber, so that the composite material has excellent mechanical property and aging resistance, and has the characteristics of good mechanical property, excellent hot air aging resistance, low heat generation and small compression permanent deformation.
Detailed Description
The present invention is described in further detail below with reference to examples, but it should not be construed that the scope of the above subject matter of the present invention is limited to the following examples, and that all the technologies realized based on the above subject matter of the present invention belong to the scope of the present invention.
The parts described in the following examples are parts by weight.
Example 1
A natural rubber composite material for a heavy truck plate spring rubber support comprises 75 parts of natural rubber and 25 parts of butadiene rubber; 5 parts of modified carbon nitride nanosheet, 25 parts of carbon black (N330) and 60 parts of carbon black (N762); 2 parts of N, N-diphenyl-p-phenylenediamine, 2 parts of N-phenyl-1-naphthylamine and 4 parts of 6-ethoxy-2, 4-trimethyl-1, 2-dihydroquinoline; 5 parts of paraffin oil; 5 parts of zinc oxide, 1.5 parts of stearic acid, 1.2 parts of 4,4' -dimorpholinyl disulfide, 0.8 part of N-tertiary butyl-2-benzothiazole sulfonamide and 1.5 parts of sulfur.
The modified carbon nitride nanosheet is prepared by the following method:
(1) Sealing melamine with aluminum foil paper, putting the melamine into a muffle furnace, heating to 500 ℃ at the speed of 5 ℃/min, preserving heat for 4 hours, naturally cooling to room temperature, and grinding a resultant to obtain graphitized carbon nitride;
(2) And (2) dispersing the graphitized carbon nitride in water, removing bottom sediment to obtain aqueous suspension of the graphitized carbon nitride nanosheet, drying the aqueous suspension to remove part of water, concentrating, adding bis- [3- (triethoxysilyl) propyl ] tetrasulfide, stirring at 70 ℃ in an oil bath, refluxing and condensing, reacting for 3 hours, cooling to room temperature, mixing reaction liquid, centrifuging, taking bottom sediment, and drying to obtain the modified carbon nitride nanosheet.
Example 2
A natural rubber composite material for a heavy truck plate spring rubber support comprises 80 parts of natural rubber and 20 parts of butadiene rubber; 3 parts of modified carbon nitride nanosheet, 30 parts of carbon black (N330) and 75 parts of carbon black (N762); 2 parts of N-phenyl-1-naphthylamine, 3 parts of 6-ethoxy-2, 4-trimethyl-1, 2-dihydroquinoline and 2 parts of N-cyclohexyl-N' -phenyl p-phenylenediamine; 10 parts of paraffin oil; 8 parts of zinc oxide, 3.5 parts of stearic acid, 2 parts of 4,4' -dimorpholinyl disulfide, 1.5 parts of N-tertiary butyl-2-benzothiazole sulfonamide and 2 parts of sulfur.
The modified carbon nitride nanosheet is prepared by the following method:
(1) Sealing melamine with aluminum foil paper, putting the melamine into a muffle furnace, heating to 600 ℃ at the speed of 10 ℃/min, preserving heat for 3h, naturally cooling to room temperature, and grinding the resultant to obtain graphitized carbon nitride;
(2) And (2) dispersing the graphitized carbon nitride in water, removing bottom sediment to obtain aqueous suspension of the graphitized carbon nitride nanosheet, drying the aqueous suspension to remove part of water, concentrating, adding bis- [3- (triethoxysilyl) propyl ] tetrasulfide, stirring at 50 ℃ in an oil bath, refluxing and condensing, reacting for 6 hours, cooling to room temperature, mixing reaction liquid, centrifuging, taking bottom sediment, and drying to obtain the modified carbon nitride nanosheet.
Example 3
A natural rubber composite material for a heavy truck plate spring rubber support comprises 85 parts of natural rubber; 15 parts of butadiene rubber; 8 parts of modified carbon nitride nanosheet, 30 parts of carbon black (N330) and 60 parts of carbon black (N762); 1 part of N, N-diphenyl-p-phenylenediamine, 2 parts of N-phenyl-1-naphthylamine, 1 part of 6-ethoxy-2, 4-trimethyl-1, 2-dihydroquinoline and 2 parts of N-cyclohexyl-N' -phenyl-p-phenylenediamine; 7 parts of paraffin oil; 6 parts of zinc oxide, 2 parts of stearic acid, 1.5 parts of 4,4' -dimorpholinyl disulfide, 1.5 parts of N-tertiary butyl-2-benzothiazole sulfonamide and 2 parts of sulfur.
The modified carbon nitride nanosheet is prepared by the following method:
(1) Sealing melamine with aluminum foil paper, putting the melamine into a muffle furnace, heating to 550 ℃ at the speed of 7.5 ℃/min, preserving heat for 3.5 hours, naturally cooling to room temperature, and grinding a resultant to obtain graphitized carbon nitride;
(2) And (2) dispersing the graphitized carbon nitride in water, removing the bottom sediment to obtain aqueous suspension of graphitized carbon nitride nanosheets, drying the aqueous suspension to remove part of water, concentrating, adding bis- [3- (triethoxysilyl) propyl ] -disulfide, stirring in an oil bath at 60 ℃, refluxing and condensing, reacting for 4 hours, cooling to room temperature, centrifuging the reaction liquid mixture, taking the bottom sediment, and drying to obtain the modified carbon nitride nanosheets.
Example 4
A natural rubber composite material for a heavy truck leaf spring rubber support comprises 80 parts of natural rubber; 20 parts of butadiene rubber; 7 parts of modified carbon nitride nanosheets, 30 parts of carbon black (N330) and 65 parts of carbon black (N762); 2.5 parts of N, N-diphenyl-p-phenylenediamine, 2.5 parts of 6-ethoxy-2, 4-trimethyl-1, 2-dihydroquinoline; 8 parts of paraffin oil; 7 parts of vulcanizing agent zinc oxide, 2 parts of stearic acid, 2 parts of 4,4' -dimorpholinyl disulfide, 1.5 parts of N-tertiary butyl-2-benzothiazole sulfonamide and 1.5 parts of sulfur.
The modified carbon nitride nanosheet is prepared by the following method:
(1) Sealing melamine with aluminum foil paper, putting the melamine into a muffle furnace, heating to 600 ℃ at the speed of 10 ℃/min, preserving heat for 3h, naturally cooling to room temperature, and grinding the resultant to obtain graphitized carbon nitride;
(2) And (2) dispersing the graphitized carbon nitride in water, removing bottom sediment to obtain aqueous suspension of the graphitized carbon nitride nanosheet, drying the aqueous suspension to remove part of water, concentrating, adding bis- [3- (triethoxy silicon) propyl ] -disulfide, stirring at 60 ℃ in an oil bath, refluxing and condensing, reacting for 5 hours, cooling to room temperature, mixing reaction liquid, centrifuging, taking bottom sediment, and drying to obtain the modified carbon nitride nanosheet.
Example 5
A natural rubber composite material for a heavy truck leaf spring rubber support comprises 80 parts of natural rubber; 20 parts of butadiene rubber; 10 parts of modified carbon nitride nanosheet, 25 parts of carbon black (N330) and 75 parts of carbon black (N762); 3.5 parts of N-phenyl-1-naphthylamine and 3.5 parts of N-cyclohexyl-N' -phenyl p-phenylenediamine; 9 parts of paraffin oil; 8 parts of zinc oxide, 2 parts of stearic acid, 1.5 parts of 4,4' -dimorpholinyl disulfide, 1.5 parts of N-tertiary butyl-2-benzothiazole sulfonamide and 2 parts of sulfur.
The modified carbon nitride nanosheet is prepared by the following method:
(1) Sealing melamine with aluminum foil paper, putting the melamine into a muffle furnace, heating to 550 ℃ at the speed of 5 ℃/min, preserving heat for 4h, naturally cooling to room temperature, and grinding the resultant to obtain graphitized carbon nitride;
(2) And (2) dispersing the graphitized carbon nitride in water, removing the bottom sediment to obtain aqueous suspension of graphitized carbon nitride nanosheets, drying the aqueous suspension to remove part of water, concentrating, adding bis- [3- (triethoxysilyl) propyl ] -disulfide, stirring in an oil bath at 60 ℃, refluxing and condensing, reacting for 4 hours, cooling to room temperature, centrifuging the reaction liquid mixture, taking the bottom sediment, and drying to obtain the modified carbon nitride nanosheets.
Comparative example 1
A natural rubber composite material for a heavy truck plate spring rubber support comprises 75 parts of natural rubber and 25 parts of butadiene rubber; 30 parts of carbon black (N330) and 60 parts of carbon black (N762); 2 parts of N, N-diphenyl-p-phenylenediamine, 2 parts of N-phenyl-1-naphthylamine and 4 parts of 6-ethoxy-2, 4-trimethyl-1, 2-dihydroquinoline; 5 parts of paraffin oil; 5 parts of zinc oxide, 1.5 parts of stearic acid, 1.2 parts of 4,4' -dimorpholinyl disulfide, 0.8 part of N-tertiary butyl-2-benzothiazole sulfonamide and 1.5 parts of sulfur.
Comparative example 2
A natural rubber composite material for a heavy truck plate spring rubber support comprises 80 parts of natural rubber and 20 parts of butadiene rubber; 25 parts of carbon black (N330), 60 parts of carbon black (N762); 2 parts of N, N-diphenyl-p-phenylenediamine, 2 parts of N-phenyl-1-naphthylamine and 4 parts of 6-ethoxy-2, 4-trimethyl-1, 2-dihydroquinoline; 5 parts of paraffin oil; 5 parts of zinc oxide, 1.5 parts of stearic acid, 1.2 parts of 4,4' -dimorpholinyl disulfide, 0.8 part of N-tertiary butyl-2-benzothiazole sulfonamide and 1.5 parts of sulfur.
The heavy truck plate spring rubber composite materials prepared in the examples 1 to 5 and the comparative examples 1 to 2 are prepared into rubber products through an open mill, so that the rubber products can be applied to heavy truck plate spring rubber supports. The properties of the rubber products made of the composites of examples 1 to 5 and comparative examples 1 to 2 were analyzed, and the results are shown in Table 1 below.
TABLE 1 Natural rubber product performance table for heavy truck plate spring rubber bearing
Claims (8)
1. The natural rubber composite material for the rubber support of the heavy truck plate spring is characterized by comprising the following components in parts by weight: 75-85 parts of natural rubber, 15-25 parts of butadiene rubber, 3-10 parts of modified carbon nitride nanosheet, 85-105 parts of carbon black, 5-8 parts of an anti-aging agent, 5-10 parts of paraffin oil and 10-17 parts of a vulcanizing agent.
2. The natural rubber composite material for the rubber support of the heavy truck plate spring as claimed in claim 1, wherein the preparation method of the modified carbon nitride nanosheet is as follows:
(1) Sealing melamine or urea by using aluminum foil paper, putting the melamine or urea into a muffle furnace, heating to 500-600 ℃ at the speed of 5-10 ℃/min, preserving the heat for 3-4 h, naturally cooling to room temperature, and grinding a product to obtain graphitized carbon nitride;
(2) And (2) dispersing the graphitized carbon nitride in water, removing bottom sediment to obtain a water suspension of the graphitized carbon nitride nanosheet, drying the water suspension to remove part of water, concentrating, adding a silane coupling agent, stirring at 50 to 70 ℃ in an oil bath, refluxing and condensing, reacting for 3 to 6 hours, cooling to room temperature, centrifuging the reaction solution, taking the bottom sediment, and drying to obtain the modified carbon nitride nanosheet.
3. The natural rubber composite material for the rubber mount of the heavy truck leaf spring according to claim 2, wherein the silane coupling agent in the step (2) is bis- [3- (triethoxysilyl) propyl ] tetrasulfide or bis- [3- (triethoxysilyl) propyl ] -disulfide; the mass ratio of the graphitized carbon nitride nanosheet to the silane coupling agent is 1.
4. The natural rubber composite material for the rubber mount of the leaf spring of the heavy truck according to claim 2, wherein the dispersion in the step (2) is stirring and ultrasonic.
5. The natural rubber composite material for the rubber support of the leaf spring of the heavy truck as claimed in claim 1, wherein the mass ratio of the carbon black N330 to the carbon black N762 is 1.
6. The natural rubber composite material for the rubber support of the leaf spring of the heavy truck as claimed in claim 1, wherein the antioxidant is one or more of N, N-diphenyl-p-phenylenediamine, N-phenyl-1-naphthylamine, 6-ethoxy-2, 4-trimethyl-1, 2-dihydroquinoline, and N-cyclohexyl-N' -phenyl-p-phenylenediamine.
7. The natural rubber composite material for a rubber mount of a leaf spring of a heavy truck according to claim 1, wherein the vulcanizing agent comprises: 5 to 8 parts of zinc oxide, 1.5 to 3.5 parts of stearic acid, 1.2 to 2 parts of 4,4' -dimorpholine disulfide, 0.8 to 1.5 parts of N-tert-butyl-2-benzothiazole sulfonamide and 1.5 to 2 parts of sulfur.
8. Use of the natural rubber composite material as defined in any one of claims 1 to 7 in a rubber bearing for a heavy truck leaf spring.
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| WO2008032839A1 (en) * | 2006-09-15 | 2008-03-20 | Ube Nitto Kasei Co., Ltd. | Base material covered with metal layer and process for producing the same |
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