Preparation method of graphene-silica modified natural rubber composite material with high thermal conductivity, low thermogenesis and excellent mechanical properties for tires

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

Active Publication Date: 2022-05-17
ZHONGBEI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 temperature of the tire exceeds the destruction temperature limit of the rubber, the tire will be thermally damaged. ", "burst" and other phenomena

Method used

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  • Preparation method of graphene-silica modified natural rubber composite material with high thermal conductivity, low thermogenesis and excellent mechanical properties for tires

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Experimental program
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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 method for preparing a graphene-silica modified natural rubber composite material with high thermal conductivity and low thermogenesis for tires; 2 Particles and natural rubber (NR) latex are used as raw materials, and SiO is modified twice with organic compounds and GO 2 , using the latex co-precipitation method to prepare GO‑SiO in the co-aqueous phase 2 Modified NR composites. It can not only reduce the number of mixing stages and mixing time in the rubber preparation process, reduce mixing energy consumption, reduce dust pollution, but also improve the GO‑SiO 2 Dispersion in rubber matrix to improve GO‑SiO 2 The interface interaction with the rubber matrix can significantly improve the mechanical properties of the final prepared rubber composite; at the same time, it can reduce the frictional heat generation between the filler-matrix and the interfacial thermal resistance between the filler-matrix, and reduce the tire during driving. temperature rise, thereby slowing down the thermal aging rate of rubber tires during dynamic use and prolonging the service life of rubber tires.

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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Patent Type & Authority Patents(China)
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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