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Preparation method of corona-resistant polyimide composite film and composite film

A polyimide and composite film technology, which is applied in the preparation of corona-resistant polyimide composite films and the field of composite films, can solve the problems of corona resistance and mechanical performance degradation, and achieve excellent mechanical properties and electrical resistance Halo properties, good dielectric properties, uniform distribution effect

Active Publication Date: 2022-01-28
SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, although the dielectric properties are improved by noble metal particle modification, it causes new problems: the corona resistance and mechanical properties of polyimide composites prepared by the noble metal nanoparticle modification process in the prior art decrease

Method used

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  • Preparation method of corona-resistant polyimide composite film and composite film
  • Preparation method of corona-resistant polyimide composite film and composite film
  • Preparation method of corona-resistant polyimide composite film and composite film

Examples

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Embodiment 1

[0045]Adopt the following method to prepare polyimide film:

[0046] 1) Preparation of titanium dioxide nanotubes: add anatase phase titanium dioxide powder with a particle size of 50nm and NaOH solution with a concentration of 10M in a high-pressure reactor according to a mass ratio of 1:5, and then seal it and perform a hydrothermal reaction at 140°C for 72 hours; After the reactor was cooled, the white solid was removed from the autoclave and washed with 0.1M hydrochloric acid solution, then rinsed with a large amount of deionized water until the pH value of the effluent solution was neutral, and dried at 80°C to obtain titanium dioxide nanotubes .

[0047] 2) Modification of titanium dioxide nanotubes: mix titanium dioxide nanotubes, 4-hydroxythiophenol and deionized water at a mass ratio of 100:3:2, and then put the mixture into a high-pressure container filled with argon protection at 70 After heating at ℃ for 24 hours, the modified titania nanotubes were obtained.

[...

Embodiment 2

[0054] The process for preparing the polyimide composite film is basically the same as in Example 1, the only difference being that in step 3), the silver nitrate solution is used to replace the chloroauric acid solution.

Embodiment 3

[0056] The process for preparing the polyimide composite film is basically the same as in Example 1, the only difference being that in step 3), the chloroplatinic acid solution is used to replace the chloroauric acid solution.

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Abstract

The invention relates to a preparation method of a corona-resistant polyimide composite film and a composite film. The preparation method comprises the following steps of: bonding hydroxyl-substituted thiophenol to a titanium-containing nano-material to obtain a modified titanium-containing nano-material; generating noble metal nanoparticles on the modified titanium-containing nano-material through a photo-reduction process to obtain a noble metal nanoparticle modified titanium-containing nano-material; adding the noble metal nanoparticle modified titanium-containing nano-material into a dianhydride precursor and a diamine precursor for in-situ polymerization to obtain a polyimide precursor composite material; preparing the polyimide precursor composite material into a polyimide precursor film by adopting a tape casting method, and further imidizing the polyimide precursor film to obtain the polyimide film. The polyimide film prepared by the method of the invention not only has excellent dielectric properties, but also has excellent corona resistance and mechanical properties.

Description

technical field [0001] The invention relates to a method for preparing a corona-resistant polyimide composite film and the composite film. Background technique [0002] Because of its good stability and dielectric properties, polyimide films are widely used in various industrial sectors. With the continuous expansion of the application field of polyimide film, the industry has higher and higher requirements for various properties of polyimide, such as better corona resistance and dielectric properties while maintaining mechanical properties. electrical properties etc. [0003] It is known that doping with inorganic particles can improve the corona resistance of polyimide films. Typical doped inorganic particles are inorganic particles containing titanium or titanic acid, such as titanium dioxide particles, barium titanate particles, copper calcium titanate particles, and the like. However, the incorporation of these inorganic particles, especially when the amount is large...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/08C08K9/02C08K3/22C08K9/04C08K9/06C08K7/00
CPCC08J5/18C08J2379/08C08K9/02C08K2003/2241C08K2201/011C08K9/04C08K9/06C08K7/00
Inventor 程小荣吴斌马俊锋张春琪崔益华包睿瀚张超
Owner SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD