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Graphene composited polyimide film and preparation method thereof

A technology of composite polyimide and polyimide resin, which is applied in the field of graphene composite polyimide film and its preparation, can solve the problems of low flatness of composite materials, unsatisfactory performance, cumbersome preparation, etc., and achieve high performance Good lifting degree, promoting spatial rheology, improving the effect of spatial network structure

Active Publication Date: 2018-03-23
JIANGSU YABAO INSULATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there have been a large number of reports on special polyimide composite film materials, but there are still problems such as cumbersome preparation, large pollution, low flatness of the final composite material, and unsatisfactory performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A graphene composite polyimide film, which is composed of the following components in parts by weight: 170 parts of polyimide resin polymer, 1.2 parts of fullerene, 0.13 parts of rare earth oxide, and 2.7 parts of modifier; The modifier is made up of methyl salicylate and liquid paraffin in a weight ratio of 3.5:1.

[0024] The polyimide resin polymer includes the following components by weight percentage: graphene 1%, titanium dioxide 2%, silica sol 0.5%, fluorinated acrylate copolymer 4%, polyimide resin balance, as follows Steps to proceed:

[0025] 1) Weigh the raw materials according to the weight ratio, slowly heat the polyimide resin to 60°C, then add the fluorine-containing acrylate copolymer to it, first stir quickly at 150rpm for 15min, and then stir slowly at 50rpm for 0.5h at a constant temperature. Then lower the temperature to 30±5°C, conduct ultrasonic treatment at 45KHz for 10-12min, and then keep it for 3h while keeping it warm to obtain mixture one;

[0026...

Embodiment 2

[0032] A graphene composite polyimide film, which is composed of the following components in parts by weight: 200 parts of polyimide resin polymer, 1.8 parts of fullerene, 0.2 parts of rare earth oxides, and 3 parts of modifier; The modifier is made up of methyl salicylate and liquid paraffin in a weight ratio of 4:1.

[0033] The polyimide resin polymer includes the following components by weight percentage: graphene 0.2%, titanium dioxide 1%, silica sol 4%, fluorine-containing acrylate copolymer 3%, polyimide resin balance, and The composite filler is 1.5%, and the composite filler is nano-magnesium oxide whiskers and nano-silicon oxide with a mass ratio of 1:2. The polyimide resin polymer is carried out as follows:

[0034] 1) Weigh the raw materials according to the weight ratio, slowly heat the polyimide resin to 80°C, then add the fluorine-containing acrylate copolymer to it, first stir quickly at 150rpm for 15min, and then stir slowly at 30rpm for 0.5h at a constant tempera...

Embodiment 3

[0041] A graphene composite polyimide film, which is composed of the following components in parts by weight: 200 parts of polyimide resin polymer, 1.8 parts of fullerene, 0.2 parts of rare earth oxides, and 3 parts of modifier; The modifier is made up of methyl salicylate and liquid paraffin in a weight ratio of 4.5:1.

[0042] The polyimide resin polymer includes the following components by weight percentage: graphene 0.75%, titanium dioxide 3%, silica sol 3%, fluorine-containing acrylate copolymer 6%, polyimide resin balance, and also includes The composite filler is 2%, and the composite filler is nano-magnesium oxide whiskers and nano-silicon oxide with a mass ratio of 1:1. The preparation method of the polyimide resin polymer is the same as in Example 2.

[0043] The graphene composite polyimide film is fully mixed with all the components, the film is prepared by the casting method, and then the film is cooled, hauled, and wound by two rollers.

[0044] The graphene composite...

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PUM

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Abstract

The invention discloses a graphene composited polyimide film. The film is prepared from the following components in parts by weight: 150-300 parts of polyimide resin polymer, 1-2 parts of fullerene, 0.1-0.2 parts of rare earth oxide and 2.5-3.5 parts of a modifier. The graphene composited polyimide film has excellent mechanical properties, elongation at break is higher than 40%, thickness is only8-12 mu m, tensile strength at room temperature is higher than 200 MPa, elasticity modulus is higher than 2.88 GPa, the film is wrinkle-free and high in flatness, and volume resistivity is 4.5*10<1>-3.7 x 10<6>.

Description

Technical field [0001] The invention relates to a polyimide film, in particular to a graphene composite polyimide film and a preparation method thereof. Background technique [0002] At present, the vigorous development of aerospace industry has more and more urgent requirements for polymer materials, but due to the influence of the space environment, there are strict requirements for all aspects of polymer materials. As a material with high heat resistance, polyimide also possesses high chemical stability, high mechanical properties, high radiation resistance and high processability. It has a large application space in the aerospace industry. However, the resistivity of polyimide is high, electrons are not easy to move in the material, and the accumulated charge is difficult to diffuse, and static electricity will be formed. Static electricity is extremely dangerous in the aerospace field. It is easy to damage aviation equipment and damage electronic components. [0003] As a new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L33/14C08L91/06C08K13/02C08K13/04C08K3/04C08K3/22C08K3/36C08K7/08C08J5/18
CPCC08J5/18C08J2379/08C08J2433/14C08J2491/06C08K3/04C08K3/36C08K5/1345C08K7/08C08K2003/221C08K2003/2241C08K2201/001C08K2201/011C08K2201/014
Inventor 徐伟伟王勇祁晓东姜新陈晨
Owner JIANGSU YABAO INSULATION MATERIAL
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