Preparation method of graphene-silicon dioxide modified natural rubber composite material with high thermal conductivity, low thermodynamic property and excellent mechanical property for tires

A thermodynamic performance, silicon dioxide technology, applied in the direction of rolling resistance optimization, special tires, tire parts, etc., can solve the problems of accelerated rubber aging, tire thermal damage, bursting, etc.

Active Publication Date: 2021-10-01
ZHONGBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The increase in working temperature will greatly accelerate the aging of rubber and shorten the service life of the tire. When the internal t...

Method used

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  • Preparation method of graphene-silicon dioxide modified natural rubber composite material with high thermal conductivity, low thermodynamic property and excellent mechanical property for tires

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Effect test

Embodiment 1

[0031] Graphene oxide-silica modified natural rubber

[0032] ①Preparation of surface aminated silica: Mix ethanol and water at a mass ratio of 7:1 at room temperature, then add 3g to 5g of silane coupling agent KH550 dropwise to 100ml of ethanol and water mixture Fully hydrolyzed in the middle, the hydrolysis time is 2h. Then the raw material SiO 2 The powder was added to the aqueous ethanol solution of KH550 and stirred at 70°C for 8 h to obtain KH550-modified SiO 2 . Finally, after filtering and washing three times with absolute ethanol and water, to remove unreacted KH550, the obtained modified SiO 2 Treat in a vacuum oven at 60°C for 24 hours to obtain aminated silicon dioxide.

[0033] ②Preparation of graphene oxide-silica composite particles: 100g of 0.5wt.% GO (graphene oxide) aqueous solution was mixed with deionized water, and the graphene oxide was fully dispersed in the aqueous solution by ultrasonication for 30 minutes. The GO aqueous solution was cooled to 0...

Embodiment 2

[0038] 3-Mercaptopropyltriethoxysilane Modified Graphene Oxide-Silica Modified Natural Rubber

[0039] ①Preparation of surface aminated silica: Mix ethanol and water at a mass ratio of 7:1 at room temperature, then add 3g to 5g of silane coupling agent KH550 dropwise to 100ml of ethanol and water mixture Fully hydrolyzed in the middle, the hydrolysis time is 2h. Then the raw material SiO 2 The powder was added to the aqueous ethanol solution of KH550 and stirred at 70°C for 8 h to obtain KH550-modified SiO 2 . Finally, after filtering and washing three times with absolute ethanol and water, to remove unreacted KH550, the obtained modified SiO 2 Treat in a vacuum oven at 60°C for 24 hours to obtain aminated silicon dioxide.

[0040] ②Preparation of graphene oxide-silica composite particles: Mix 100g of 0.5wt.% GO aqueous solution with deionized water, and ultrasonically 30min to fully disperse graphene oxide in the aqueous solution. The GO aqueous solution was cooled to 0 ...

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Abstract

The invention relates to the field of functional natural rubber composite materials, in particular to a preparation method of a graphene-silicon dioxide modified natural rubber composite material with high thermal conductivity, low thermodynamic property and excellent mechanical property for tires. GO aqueous dispersion liquid, SiO2 particles and natural rubber (NR) latex are used as raw materials, SiO2 is modified twice by adopting an organic compound and GO, and the GO-SiO2 modified NR composite material is prepared in a co-aqueous phase by utilizing a latex co-precipitation method. The preparation method has the advantages that the mixing section number, the mixing time, the mixing energy consumption and the dust pollution in the rubber preparation process can be reduced, the dispersity of GO-SiO2 in a rubber matrix can be improved, the interface interaction between GO-SiO2 and the rubber matrix is improved, and the mechanical property of the finally prepared rubber composite material is obviously improved; and meanwhile, friction heat generated between a filler and a matrix and interface thermal resistance between the filler and the matrix can be reduced, and temperature rise of the tire in the driving process is reduced, so that the thermal aging speed of the rubber tire in the dynamic use process is slowed down, and the service life of the rubber tire is prolonged.

Description

technical field [0001] The invention relates to the field of functional natural rubber composite materials, in particular to a method for preparing a graphene-silicon dioxide modified natural rubber composite material for tires with excellent mechanical properties of high thermal conductivity and low heat generation. Background technique [0002] Natural rubber is considered as a strategic resource and plays an irreplaceable role in industry. It also has high elasticity, high strength, high insulation, etc., and has a very wide range of uses due to its excellent and special mechanical properties. According to statistics, there are more than 70,000 kinds of common rubber parts in the world today, of which more than 40,000 kinds use natural rubber. In common rubber products, such as large aircraft tires, engineering machinery tires, large truck tires and building anti-vibration bearings, natural rubber plays an irreplaceable role for synthetic rubber. [0003] For general pne...

Claims

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Application Information

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IPC IPC(8): C08L7/02C08K9/06C08K9/04C08K3/36C08K3/04B60C1/00
CPCC08K9/06C08K9/04C08K3/36C08K3/042B60C1/00C08L7/02Y02T10/86
Inventor 刘亚青程帅帅段晓圆张志毅赵贵哲
Owner ZHONGBEI UNIV
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