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Ceramic fiber-reinforced polyimide electric insulation composite material

A polyimide electrical and ceramic fiber technology, applied in the field of ceramic fiber reinforced polyimide electrical insulating composite materials, can solve the problem of low elongation, little improvement in electrical insulation performance, poor acid and alkali resistance, etc. problems, to achieve the effect of improving elongation, excellent mechanical properties, and improving high temperature resistance

Inactive Publication Date: 2018-08-17
郭平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The use of ordinary alumina ceramic fibers to reinforce polyimide can improve the mechanical properties and high temperature resistance of polyimide to a certain extent, but it still cannot solve the problems of poor acid and alkali resistance and low elongation. There is not much improvement in the electrical insulation performance

Method used

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  • Ceramic fiber-reinforced polyimide electric insulation composite material
  • Ceramic fiber-reinforced polyimide electric insulation composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A ceramic fiber reinforced polyimide electrical insulation composite material, comprising the following steps:

[0030] (1) adopt polyacrylamide to modify nano sericite, obtain polyacrylamide modified nano sericite;

[0031] (2) Disperse polyacrylamide modified nano-sericite in absolute ethanol, then disperse polyimide powder in absolute ethanol, then add 0.12% silane coupling agent of polyimide quality, heat To 80°C, stir at 1800r / min for 2 hours to obtain a mixed dispersion;

[0032] (3) Stir the polyimide and the mixed dispersion liquid at a ratio of 150g: 300mL under an ultrasonic field at high speed, then grind them, and then dry them at high temperature under an inert gas atmosphere to obtain a mixed material;

[0033] (4) Mix the mixed material and the ceramic fiber at a mass ratio of 12:1, and obtain a ceramic fiber-reinforced polyimide electrically insulating composite material by compression molding.

[0034] Further, the preparation method of polyacrylamide...

Embodiment 2

[0048] A ceramic fiber reinforced polyimide electrical insulation composite material, comprising the following steps:

[0049] (1) adopt polyacrylamide to modify nano sericite, obtain polyacrylamide modified nano sericite;

[0050] (2) Disperse polyacrylamide modified nano-sericite in absolute ethanol, then disperse polyimide powder in absolute ethanol, then add 0.12% silane coupling agent of polyimide quality, heat To 80°C, stir at 1800r / min for 2 hours to obtain a mixed dispersion;

[0051] (3) Stir the polyimide and the mixed dispersion at a ratio of 200g: 300mL under an ultrasonic field at high speed, then grind them, and then dry them at a high temperature under an inert gas atmosphere to obtain a mixed material;

[0052] (4) Mix the mixed material and the ceramic fiber at a mass ratio of 12:2, and obtain a ceramic fiber-reinforced polyimide electrically insulating composite material by compression molding.

[0053] Further, the preparation method of polyacrylamide-modi...

Embodiment 3

[0067] A ceramic fiber reinforced polyimide electrical insulation composite material, comprising the following steps:

[0068] (1) adopt polyacrylamide to modify nano sericite, obtain polyacrylamide modified nano sericite;

[0069] (2) Disperse polyacrylamide modified nano-sericite in absolute ethanol, then disperse polyimide powder in absolute ethanol, then add 0.12% silane coupling agent of polyimide quality, heat To 80°C, stir at 1800r / min for 2 hours to obtain a mixed dispersion;

[0070] (3) Stir the polyimide and the mixed dispersion at a ratio of 180g: 300mL under an ultrasonic field at high speed, then grind them, and then dry them at high temperature under an inert gas atmosphere to obtain a mixed material;

[0071] (4) Mix the mixed material and the ceramic fiber at a mass ratio of 12:1.5, and obtain a ceramic fiber-reinforced polyimide electrically insulating composite material by compression molding.

[0072] Further, the preparation method of polyacrylamide-modi...

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Abstract

The invention discloses a ceramic fiber-reinforced polyimide electric insulation composite material, which relates to the technical field of ceramic-based composite materials. The ceramic fiber-reinforced polyimide electric insulation composite material is prepared by the following steps: (1) polyacrylamide is adopted to modify nano-sericite, so that polyacrylamide-modified nano-sericite is obtained; (2) the polyacrylamide-modified nano-sericite is dispersed into absolute ethyl alcohol, polyimide powder is dispersed into the absolute ethyl alcohol, and thereby mixed dispersion is prepared; (3)the mixed dispersion is agitated at high speed under an ultrasonic field, grinding is then carried out, and after drying under high temperature, a mixed material is obtained; (4) the mixed material and ceramic fibers are mixed, and by die-pressing, the ceramic fiber-reinforced polyimide electric insulation composite material is obtained. According to the ceramic fiber-reinforced polyimide electric insulation composite material provided by the invention, not only can the high temperature resistance and acid and alkali resistance of the material be remarkably improved, but also the elongation of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of ceramic matrix composite materials, and in particular relates to a ceramic fiber reinforced polyimide electrical insulation composite material. Background technique [0002] Fiber-reinforced polymer materials (fiber-reinforced poly-mers, FRPs) have been more and more widely used in modern industry due to their excellent comprehensive properties. After years of development, FRPs have achieved important developments in both basic and applied research fields. Various high-performance FRPs products have been used in military and civilian high-tech fields such as aviation, aerospace, machinery, electrical engineering, and electronics. With the continuous improvement of material performance requirements in the modern high-tech field, the depletion of global conventional energy sources and the improvement of environmental protection awareness, an important research direction of FRPs is how to develop new materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K9/04C08K9/06C08K7/04C08K3/34
CPCC08K3/34C08K7/04C08K9/04C08K9/06C08K2201/011C08L79/08
Inventor 郭平
Owner 郭平
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