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Method for preparing PVDF-TrFE/graphene high performance composite material

A composite material, graphene technology, used in flat products, household appliances, other household appliances, etc.

Inactive Publication Date: 2018-07-10
海宁盛台材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no patent publication on PVDF-TrFE adding nanoparticles to enhance the piezoelectric performance

Method used

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  • Method for preparing PVDF-TrFE/graphene high performance composite material

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Experimental program
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Effect test

Embodiment 1

[0025] The goal of this embodiment is to make a PVDF-TrFE / graphene composite film, the content of graphene is 0.05wt%, the film length is 3cm, the width is 1cm, the thickness before stretching is about 300 μm, and the thickness after stretching is about 100 μm .

[0026] The materials used are PVDF-TrFE powder, commercial graphene, and the solvent is DMF solution (purity>99%). The material parameters are shown in the table below:

[0027] Table 1 Properties of PVDF-TrFE

[0028] molecular weight

350000

melting temperature

153℃

Curie temperature

118℃

Composition: VDF / TrFE

75 / 25 (mol%)

form

powder

[0029] Table 2 Properties of Graphene

[0030] density

>1g / cm 3

Elastic Modulus

1TPa

tensile strength

130GPa

Conductivity

10 6 S / cm

Thermal conductivity

About 5000W / mK

specific surface area

2630m 2 / g

[0031] The specific production steps are as follo...

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Abstract

The invention discloses a method for preparing PVDF-TrFE high performance piezoelectric film. The method is divided into the following steps of 1, evenly stirring PVDF-TrFE powder and graphene nanoparticles in a DMF solution by using an ultrasonic stirrer and a mechanical stirrer; 2, initially crystallizing an obtained mixed solution in a drying oven; 3, axially stretching film after initial crystallization on a stretching machine; 4, conducting heat treatment on the film after stretching; 5, performing polarization on the film after the heat treatment. The method has advantages of low cost, high piezoelectric performance, simple operation and low process requirements.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of adding graphene to PVDF-TrFE to enhance its piezoelectric performance. Background technique [0002] Self-powered technology is an advanced technology that converts the energy around the device into electrical energy and drives the device to work. It is widely used in wireless sensors, building health monitoring, machine online monitoring, micro-nano devices and other fields. Among the piezoelectric materials that realize energy conversion, PVDF and its copolymers have attracted extensive attention due to their characteristics of no pollution, acid and alkali corrosion resistance, convenient shape, and good flexibility. However, in the primary crystal film of PVDF and its copolymer, the non-piezoelectric α crystal phase is the main component, so in order to improve its piezoelectric effect, it is necessary to change the crystal structure insi...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K3/04C08J5/18B29D7/01
Inventor 胡宁阿拉木斯吴良科
Owner 海宁盛台材料科技有限公司
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