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Polyimide composite material, composite film and preparation methods of polyimide composite material, composite film

A technology of polyimide and composite materials, which is applied in the direction of coating, etc., can solve the problems of large calcium copper titanium oxide particles and the inability to achieve corona resistance effects, so as to improve dispersion, reduce the probability of agglomeration, and improve electrical resistance halo performance effect

Active Publication Date: 2022-01-18
SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calcium-copper-titanium oxide particles used in the polyimide composite film are large (micron-sized) and a single-layer film, which cannot achieve better corona resistance.

Method used

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  • Polyimide composite material, composite film and preparation methods of polyimide composite material, composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Adopt following method to prepare polyimide composite film of the present invention:

[0049] 1) Preparation of TiO 2 Nanotubes: Add titanium dioxide powder (particle size: 50 nm) and NaOH solution with a concentration of 10M in the autoclave according to the mass ratio of 1:5, seal it and put it in an oven at 140°C for 72 hours; after the reactor is cooled, put The reaction product was moved to filter paper, rinsed with 0.1M hydrochloric acid and a large amount of deionized water, and filtered for later use.

[0050] 2) In situ growth of gold nanoparticles: the rinsed and filtered TiO 2 The nanotube flocs were transferred to a suction filter with a peristaltic pump, and the titanium dioxide nanotubes were repeatedly washed with 0.01M concentration of chloroauric acid solution for 5 times; The material was moved to a 100W ultraviolet lamp and irradiated for 10-15 minutes; then the floc was naturally dried to obtain gold nanoparticle-modified titanium dioxide nanotube ...

Embodiment 2

[0064] The process for preparing the polyimide composite film is basically the same as in Example 1, the only difference being that when the polyimide composite precursor is prepared by in-situ polymerization, the titanium dioxide nanotubes modified by the gold nanoparticles modified by the silane coupling agent account for 1% of the total. 15% of the total mass of all dianhydride and diamine precursors.

[0065] The performance of the composite film was also tested, and the results are shown in Table 1.

Embodiment 3

[0067] The process for preparing the polyimide composite film is basically the same as in Example 1, the only difference being that when the polyimide composite precursor is prepared by in-situ polymerization, the titanium dioxide nanotubes modified by the gold nanoparticles modified by the silane coupling agent account for 1% of the total. 20% of the total mass of all dianhydride and diamine precursors.

[0068] The performance of the composite film was also tested, and the results are shown in Table 1.

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Abstract

The invention relates to a polyimide composite material, a composite film and preparation methods of thepolyimide composite material and the composite film. The polyimide composite material comprises polyimide, noble metal Au, Ag or Pt nanoparticles and a TiO2 nanotube, wherein the noble metal nanoparticles grow on the inner wall and the outer wall of the TiO2 nanotube in situ. The preparation method of the polyimide composite material comprises the following steps of: performing in-situ growth of noble metal nanoparticles on the inner wall and the outer wall of a TiO2 nanotube through a photoreduction process; adding the TiO2 nanotube with the noble metal nanoparticles into dianhydride and diamine precursors for in-situ polymerization to obtain a polyimide precursor composite material; and performing imidization to obtain the polyimide composite material. The upper and lower surfaces of a common polyimide intermediate layer are coated with the polyimide precursor composite material on at the same time, and then imidization is performed to obtain the polyimide composite film. The polyimide composite film disclosed by the invention has obviously improved corona resistance under the condition of keeping excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of high molecular polymer materials, and in particular relates to a polyimide composite material, a composite film and a preparation method thereof. Background technique [0002] Polyimide is a polymer material widely used in various fields of national production. Due to the highly stable structural unit imide ring in the polyimide molecular chain, the polyimide material has outstanding thermal stability and electrical properties. At present, polyimide materials are widely used in engineering materials, electric electronic devices, artificial satellites and other fields, and new application fields are constantly being developed. Many studies have shown that doping aluminum oxide, silicon oxide, titanium dioxide and other inorganic particles in polyimide can significantly improve the corona resistance and other properties of polyimide. The test results show that the doping of inorganic particles can signifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K9/06C08K7/24C08K3/08C08J7/04C08J5/18
CPCC08J7/04C08J5/18C08K9/06C08K7/24C08K2201/003C08K2201/004C08K2201/005C08K2003/0806C08K2003/0831C08K3/08C08J2379/08C08J2479/08
Inventor 程小荣吴斌张春琪马俊锋崔益华张超李翛
Owner SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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