Polyvinylidene fluoride/graphene composite material and preparation method thereof

A technology of polyvinylidene fluoride and composite materials, which is applied in the field of graphene, can solve the problems of technology promotion and industrial application, complex preparation methods, high cost, etc., achieve improved thermal conductivity and electrical conductivity, simple preparation process, and energy saving Effect

Active Publication Date: 2013-12-25
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods all require the use of a large amount of solvents, high cost, large pollution, and complicated preparation methods
Therefore, it has been restricted in terms of technology promotion and industrial application.

Method used

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  • Polyvinylidene fluoride/graphene composite material and preparation method thereof
  • Polyvinylidene fluoride/graphene composite material and preparation method thereof
  • Polyvinylidene fluoride/graphene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 91g of polyvinylidene fluoride, 3g of graphene, 5g of stearic acid amide, 0.5g of white oil, 0.3g of sodium lauryl sulfate, and 0.2g of silane coupling agent KH560 into a high-speed mixer and mix for 5 minutes. Mix well After that, a mixture is obtained. The mixture was melted and hot-pressed for 10 minutes at 200° C. and 10 MPa pressure with a flat vulcanizer to obtain a polyvinylidene fluoride / graphene composite material.

Embodiment 2

[0034] Add 87.4g of polyvinylidene fluoride, 5g of graphene, 3g of stearic acid amide, 3g of ethylene bisstearamide, 1g of white oil, 0.4g of sodium lauryl sulfate, and 0.2g of silane coupling agent KH560 into the high-speed mixing Mix in the machine for 5 minutes, and mix well to obtain the mixture. The mixture was melted and hot-pressed for 10 minutes at 200° C. and 10 MPa pressure with a flat vulcanizer to obtain a polyvinylidene fluoride / graphene composite material. Tested by a four-probe tester, the average volume resistivity is 6.767 .

Embodiment 3

[0036] Add 81.4g of polyvinylidene fluoride, 10g of graphene, 4g of stearic acid amide, 2g of ethylene bisstearamide, 2g of white oil, and 0.6g of sodium lauryl sulfate into a high-speed mixer and mix for 8 minutes. Mix well After that, a mixture is obtained. The mixture was hot-pressed for 10 minutes at 200° C. and 10 MPa pigment with a flat vulcanizer to obtain a polyvinylidene fluoride / graphene composite material. The thermal diffusivity measured at 30°C is 0.676 , the specific heat capacity is 1.053 , the thermal conductivity is 1.008 .

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Abstract

The invention discloses a polyvinylidene fluoride / graphene composite material and a preparation method thereof. The material is a blend which comprises the following raw materials by weight percent: 65-95% of polyvinylidene fluoride, 0.1-20% of graphene, 0.1-10% of dispersing agent, 0-10% of wetting agent, 0-5% of surface active agent and 0-2% of compatilizer. The raw material compositions are mixed by a high speed mixer, and then are subjected to melt blending to obtain the polyvinylidene fluoride / graphene composite material. According to the invention, a solvent is not used in the preparation method of the composite material; the polyvinylidene fluoride / graphene composite material and the preparation method thereof have the characteristics of simple preparation technology, energy conservation, environmental protection and the like, and can be applied in the fields such as piezoelectric materials, thermoelectric materials and dielectric materials and conducting materials.

Description

technical field [0001] The invention belongs to the technical field of graphene, and relates to a polyvinylidene fluoride / graphene composite material and a preparation method thereof. Background technique [0002] Most polymer materials have poor electrical and thermal conductivity and low dielectric constants. Polyvinylidene fluoride PVDF has higher thermal and electrical properties than other polymer materials, and is often used as a matrix for high dielectric, high electrical conductivity and high thermal conductivity composite materials. However, most of the modified fillers in the existing technology are graphite, carbon black, ceramic powder, metal powder or fiber, etc., and the filling amount of the filler is large, and the improvement of thermal and electrical properties is not obvious. [0003] Graphene is a new type of two-dimensional carbonaceous material discovered in recent years. It has a very stable structure, outstanding electrical properties, good thermal p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L29/04C08L83/04C08K13/02C08K3/04C08K5/20C08K5/54C08K5/01C08K5/42
Inventor 薛立新刘富林海波沈剑辉向艳慧
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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