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Wear-resistant polyimide film and preparation method thereof

A technology of wear-resistant polyimide and film, which is applied in the field of polyimide film, can solve the problems of high friction coefficient of pure polyimide material, limit the application of polyimide, and high wear rate, so as to improve mechanical properties , good wear resistance, the effect of increasing mechanical properties and wear resistance

Pending Publication Date: 2020-06-23
太湖方舟新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of the times, the performance of polyimide can no longer meet people's needs, and pure polyimide materials have the disadvantages of large friction coefficient and high wear rate in the process of friction and wear, which limit the performance of polyimide. Application of imines in friction materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a wear-resistant polyimide film, comprising the following steps: in a nitrogen gas atmosphere, adding mixed fillers to the N,N-dimethylacetamide solution of aromatic diamine and mixing, and then adding aromatic diamine Dianhydride, reacted at 50°C for 6h, adjusted the solid content to 20wt% with N,N-dimethylacetamide solution to obtain an intermediate material; took the intermediate material for degassing and coated it on the surface of the substrate, and then heated it at 150°C, 210°C, Insulate at 300°C for 30min, then at 400°C for 1min, and remove the film to obtain a wear-resistant polyimide film; among them, the mixed filler is molybdenum disulfide with a particle size of 2000 mesh, nano-polytetrafluoroethylene, γ-aminopropyltriethyl Oxysilane modified carbon nanotubes, silane coupling agent;

[0023] The weight ratio of molybdenum disulfide, nano polytetrafluoroethylene, gamma-aminopropyltriethoxysilane modified carbon nanotubes and silane co...

Embodiment 2

[0028] A method for preparing a wear-resistant polyimide film, comprising the following steps: in a nitrogen gas atmosphere, adding mixed fillers to the N,N-dimethylacetamide solution of aromatic diamine and mixing, and then adding aromatic diamine Dianhydride, reacted at 70°C for 5h, adjusted the solid content to 30wt% with N,N-dimethylacetamide solution to obtain an intermediate material; took the intermediate material for degassing and coated it on the surface of the substrate, and heated it at 130°C, 190°C, Insulate at 250°C for 40 minutes, then at 380°C for 2 minutes, and remove the film to obtain a wear-resistant polyimide film; among them, the mixed filler is molybdenum disulfide with a particle size of 1000 mesh, nano-polytetrafluoroethylene, γ-aminopropyl triethyl Oxysilane modified carbon nanotubes, silane coupling agent;

[0029] The weight ratio of molybdenum disulfide, nano polytetrafluoroethylene, gamma-aminopropyltriethoxysilane modified carbon nanotubes and sil...

Embodiment 3

[0034] A method for preparing a wear-resistant polyimide film, comprising the following steps: in a nitrogen gas atmosphere, adding mixed fillers to the N,N-dimethylacetamide solution of aromatic diamine and mixing, and then adding aromatic diamine Dianhydride, react at 60°C for 5.5h, use N,N-dimethylacetamide solution to adjust the solid content to 25wt% to obtain the intermediate material; take the intermediate material for degassing and apply it on the surface of the substrate, and heat it at 140°C and 200°C respectively , heat preservation at 275°C for 35min, and then heat preservation at 390°C for 1min, and the wear-resistant polyimide film was obtained by demolding; wherein, the mixed filler was molybdenum disulfide with a particle size of 2000 mesh, nano-polytetrafluoroethylene, γ-aminopropyl three Ethoxysilane modified carbon nanotubes, silane coupling agent;

[0035] The weight ratio of molybdenum disulfide, nano polytetrafluoroethylene, gamma-aminopropyltriethoxysila...

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Abstract

The invention discloses a preparation method of a wear-resistant polyimide film, which comprises the following steps: in an inert gas atmosphere, adding a mixed filler into an aromatic diamine solution, uniformly mixing, adding aromatic dianhydride, and reacting to obtain an intermediate material; defoaming the intermediate material, coating the surface of a substrate with the defoamed intermediate material, and carrying out imidization and demolding to obtain a wear-resistant polyimide film; wherein the mixed filler is molybdenum disulfide, nano polytetrafluoroethylene, modified carbon nanotubes and a silane coupling agent. The invention also discloses a wear-resistant polyimide film which is prepared according to the preparation method of the wear-resistant polyimide film. The wear-resistant polyimide film has good wear resistance and good mechanical properties.

Description

technical field [0001] The invention relates to the technical field of polyimide films, in particular to a wear-resistant polyimide film and a preparation method thereof. Background technique [0002] Polyimides are a class of engineering polymers with high thermal stability, good mechanical properties, and excellent electronic properties, which are attributed to polyimide groups and aromatic structures. At the same time, in a specific environment, polyimide also has good tribological properties. However, with the development of the times, the performance of polyimide can no longer meet people's needs, and pure polyimide materials have the disadvantages of large friction coefficient and high wear rate in the process of friction and wear, which limit the performance of polyimide. Application of imines in friction materials. Contents of the invention [0003] Based on the technical problems in the background technology, the invention proposes a wear-resistant polyimide fil...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08L27/18C08K13/06C08K9/06C08K3/04C08K3/30C08J5/18C08G73/10
CPCC08J5/18C08G73/1071C08G73/1039C08G73/1007C08J2379/08C08J2427/18C08K13/06C08K9/06C08K3/041C08K2201/011C08K2003/3009
Inventor 方晓栋宋丽英
Owner 太湖方舟新材料科技有限公司
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