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Polyimide composite material, composite film and preparation method thereof

A polyimide and composite material technology, applied in coatings and other directions, can solve the problems of large calcium-copper-titanium-oxygen particles and inability to achieve corona resistance effect, so as to improve dispersibility, reduce the probability of agglomeration, and improve mechanical properties Effect

Active Publication Date: 2022-07-29
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 method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The polyimide composite film of the present invention is prepared by the following method:

[0050] 1) Preparation of TiO 2 Nanotubes: add titanium dioxide powder (particle size 50 nanometers) and NaOH solution of 10M concentration in the autoclave according to the mass ratio of 1:5, seal it and put it into an oven at 140 ° C for 72 hours; The reaction product was moved to filter paper, washed with 0.1M hydrochloric acid and a large amount of deionized water, respectively, and filtered for use.

[0051] 2) In situ growth of gold nanoparticles: the rinsed, filtered TiO 2 The nanotube flocs were transferred to a suction filter with a peristaltic pump, and the titanium dioxide nanotubes were repeatedly washed 5 times with 0.01M chloroauric acid solution; The material was moved to a 100W UV lamp and illuminated for 10-15 minutes; then the flocs were naturally dried to obtain gold nanoparticle-modified titanium dioxide nanotube powder.

[0052] 3) Modification of silane c...

Embodiment 2

[0065] The process for preparing the polyimide composite film is basically the same as that in Example 1, with the only difference that: when the polyimide composite precursor is prepared by in-situ polymerization, the silane coupling agent-modified gold nanoparticles modified titania nanotubes occupy the same proportion as the polyimide composite precursor. 15% of the total mass of all dianhydride and diamine precursors.

[0066] The properties of the composite films were also tested, and the results are shown in Table 1.

Embodiment 3

[0068] The process for preparing the polyimide composite film is basically the same as that in Example 1, with the only difference that: when the polyimide composite precursor is prepared by in-situ polymerization, the silane coupling agent-modified gold nanoparticles modified titania nanotubes occupy the same proportion as the polyimide composite precursor. 20% of the total mass of all dianhydride and diamine precursors.

[0069] The properties of the composite films were 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 a preparation method thereof. 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 comprises the following steps: 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 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. And coating the polyimide precursor composite material on the upper and lower surfaces of the common polyimide intermediate layer at the same time, and then performing imidization 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

[0001] The present invention is a divisional application with an application date of October 28, 2021, an application number of 202111261148.7, and the title of the invention as a polyimide composite material, a composite film and a preparation method thereof. technical field [0002] The invention belongs to the technical field of polymer polymer materials, and particularly relates to a polyimide composite material, a composite film and a preparation method thereof. Background technique [0003] Polyimide is a polymer material that is 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, in the fields of engineering materials, electric electronic devices, artificial satellites, etc., polyimide materials have been widely used and new application fields have been developed. Many studies have show...

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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