A kind of preparation method of rubber/graphene composite material with isolated structure

A composite material and isolation structure technology, which is applied in the application field of polymer materials, can solve the problems of conductive rubber composite materials that are difficult to build isolation structures, limit the industrial application of conductive rubber composite materials, poor interface interaction, etc., and reduce the threshold value of conductive seepage. , Overcome the effect that it is difficult to form a continuous conductive network and easy to operate

Inactive Publication Date: 2019-02-26
广州中谱检测技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the poor interface between the conductive filler and the rubber matrix, it is difficult to construct a conductive rubber composite with an isolated structure, which greatly limits the industrial application of conductive rubber composites.

Method used

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  • A kind of preparation method of rubber/graphene composite material with isolated structure
  • A kind of preparation method of rubber/graphene composite material with isolated structure
  • A kind of preparation method of rubber/graphene composite material with isolated structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of functionalized graphene suspension: take 0.2 g of graphene and 0.1 g of polyallylamine, ultrasonically disperse for 1 h, centrifuge, wash, and re-disperse ultrasonically to obtain a uniform functionalized graphene suspension.

[0026] (2) Preparation of styrene-butadiene rubber / graphene composite: ultrasonically disperse the functionalized graphene suspension in the mixed latex of 20.0g carboxylated styrene-butadiene latex and 180.0g styrene-butadiene latex, and add 108.5g of rubber compounding agent aqueous dispersion , under 300W ultrasonic power and 300r / min stirring speed, after ultrasonic stirring and dispersion for 30min, a white styrene-butadiene rubber / graphene composite was obtained.

[0027] (3) Preparation of styrene-butadiene rubber / graphene composite material with continuous isolation structure: the styrene-butadiene rubber / graphene composite prepared in step (2) was air-dried at 45°C for 12 hours; finally, the dried composite The materia...

Embodiment 2

[0030] (1) Preparation of functionalized graphene suspension: take 0.2 g of graphene and 0.2 g of polyallylamine, ultrasonically disperse for 1.5 h, centrifuge, wash, and re-disperse ultrasonically to obtain a uniform functionalized graphene suspension.

[0031] (2) Preparation of styrene-butadiene rubber / graphene composite: ultrasonically disperse the functionalized graphene suspension in the mixed latex of 40.0g carboxylated styrene-butadiene latex and 160.0g styrene-butadiene latex, and add 108.5g of rubber compounding agent aqueous dispersion , under 300W ultrasonic power and 300r / min stirring speed, after ultrasonic stirring and dispersion for 30min, a white styrene-butadiene rubber / graphene composite was obtained.

[0032] (3) Preparation of styrene-butadiene rubber / graphene composite material with continuous isolation structure: the styrene-butadiene rubber / graphene composite prepared in step (2) was air-dried at 45°C for 12 hours; finally, the dried composite The mater...

Embodiment 3

[0035](1) Preparation of functionalized graphene suspension: take 0.2 g of graphene and 0.3 g of polyallylamine, ultrasonically disperse for 2 h, centrifuge, wash, and re-disperse ultrasonically to obtain a uniform functionalized graphene suspension.

[0036] (2) Preparation of styrene-butadiene rubber / graphene composite: ultrasonically disperse the functionalized graphene suspension in the mixed latex of 60.0g carboxylated styrene-butadiene latex and 140.0g styrene-butadiene latex, and add 108.5g of rubber compounding agent aqueous dispersion , under 300W ultrasonic power and 300r / min stirring speed, after ultrasonic stirring and dispersion for 30min, a white styrene-butadiene rubber / graphene composite was obtained.

[0037] (3) Preparation of styrene-butadiene rubber / graphene composite material with continuous isolation structure: the styrene-butadiene rubber / graphene composite prepared in step (2) was air-dried at 45°C for 12 hours; finally, the dried composite The material...

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Abstract

The invention discloses a preparation method of a rubber / graphene composite material with an isolation structure. The preparation method comprises the following steps of under the action of ultrasonic waves, using a cationic polyelectrolyte as a dispersant and a surfactant to functionalize the surface of the graphene; adsorbing the water-soluble cationic polyelectrolyte through the surface of the graphene, so as to prepare a uniformly-dispersed functionalized graphene suspension; uniformly mixing the functionalized graphene and the mixed latex of carboxylic butadiene-styrene latex and styrene-butadiene latex, wherein the functionalized graphene selectively generates electrostatic adsorbing function and hydrogen bond function with the carboxylic butadiene-styrene latex particles to promote the functionalized graphene and the carboxylic butadiene-styrene latex particles to be assembled into the isolation structure; utilizing the volume excluding effect of the styrene-butadiene latex particles to effectively and selectively disperse the graphene into the carboxylic butadiene-styrene rubber; finally, directly performing hot pressing, so as to obtain the butadiene styrene rubber / graphene composite material with the continuous isolation structure. The preparation method has the advantage that a new concept is provided for preparing the conductive rubber composite material with low seepage threshold value and good processing property and comprehensive property.

Description

technical field [0001] The invention relates to a preparation method of a rubber / graphene composite material with an isolation structure, belonging to the application field of polymer materials. Background technique [0002] Polymer conductive composites have attracted extensive academic attention and applied research due to their potential applications in the fields of sensors, conductors, electromagnetic shielding materials, and photovoltaic devices. [0003] At present, the main method to improve the conductivity of polymer composites is to fill a large amount of conductive fillers, such as carbon black, carbon nanotubes, graphene, etc. Generally, a higher amount of conductive fillers is required to build a continuous and effective conductive path. For example, in Chinese patent CN102746663B, the amount of conductive carbon black accounts for 7-10%; in Chinese patent CN101851383B, the amount of carbon-based conductive filler accounts for 10-15%. Therefore, the addition o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/08C08L13/02C08K13/06C08K3/22C08K5/09C08K9/04C08K7/00
CPCC08K2003/2296C08L9/08C08L13/02C08K13/06C08K3/22C08K5/09C08K9/08C08K7/00
Inventor 管新兵占宏君吴龙梅李凯杰何俊杰陈文宁韩琪
Owner 广州中谱检测技术服务有限公司
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