Bismuth, manganese, cobalt and niobium doped zinc oxide-polyimide composite film, and production method thereof

A polyimide and composite film technology, applied in the field of materials, can solve the problem of inability to improve the uneven distribution of the electric field, and achieve the effect of solving the uneven distribution of the electric field, improving the distribution of the electric field, and avoiding the concentration of the local electric field

Inactive Publication Date: 2017-08-15
JING FENG GRP
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  • Abstract
  • Description
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Problems solved by technology

The results show that the resistance value of the composite material varies in the range of 1-4 orders of m

Method used

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Embodiment Construction

[0017] The zinc oxide-polyimide composite film doped with bismuth, manganese, cobalt, and niobium in this embodiment is prepared from the following raw materials in parts by weight: 25 parts of zinc oxide, 1 part of bismuth oxide, and 3 parts of manganese dioxide , 0.8 parts of tricobalt tetroxide, 0.7 parts of niobium pentoxide, 4 parts of silicon dioxide, 12 parts of aluminum oxide, 20 parts of hydroquinone, 15 parts of 3-trifluoromethyl-4-chloronitrobenzene, anhydrous potassium carbonate 4 parts, 50 parts of DMF, 120 parts of toluene, 50 parts of acetone, 200 parts of absolute ethanol, 100 parts of hydrochloric acid solution, 10 parts of sodium hydroxide, 200 parts of N-methylpyrrolidone, 30 parts of trifluoroacetylacetone, dimethyl 400 parts of diphenylmethanediamine, 200 parts of 4,4'-diaminodiphenyl ether, 220 parts of 1,4,5,8-naphthalene tetracarboxylic dianhydride, and an appropriate amount of deionized water.

[0018] The zinc oxide-polyimide composite film doped with...

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Abstract

A bismuth, manganese, cobalt and niobium doped zinc oxide-polyimide composite film is obtained through the following steps: doping zinc oxide with doped with bismuth, manganese, cobalt and niobium to obtain zinc oxide powder particles having nonlinear dielectric properties; reacting hydroquinone with 3-trifluoromethyl-4-chloronitrobenzene to obtain a fluorine-containing compound; polymerizing polyimide on the surface of the zinc oxide powder particles in an in-situ manner, and modifying the obtained particles with the fluorine-containing compound to make the zinc oxide powder particles have nonlinear conductive properties; and carrying out film casting and temperature programming. The composite film has nonlinear conductive properties and nonlinear dielectric properties, adaptively changes with the applied electric field, and is helpful for solving the problem of non-uniform distribution of the electric field; and the composite film has significantly better strength, rigidity, transparency and dimensional stability than existing polyimide films.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a zinc oxide-polyimide composite film doped with bismuth, manganese, cobalt and niobium and a preparation method thereof. Background technique [0002] In high-voltage, ultra-high voltage and even ultra-high voltage AC-DC power transmission systems (referred to as high-voltage power transmission and transformation systems), the higher the system voltage level, the more important and difficult the insulation problem becomes. Insulation equipment or components in high-voltage power transmission and transformation systems often suffer from extremely uneven electric field distribution, such as the insulation part of the cable terminal, the high-voltage end part of various insulators, etc., and the strength of the electric field it bears far exceeds the overall electric field The average value of the strength even reaches several times of the average value, which brings a series of adverse ef...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K3/00C08K3/22C08G73/10
CPCC08G73/1039C08J5/18C08J2379/08C08K3/00C08K3/22C08K3/36C08K2003/2227C08K2003/2262C08K2003/2289C08K2003/2296C08L2203/16C08L79/08
Inventor 许义彬
Owner JING FENG GRP
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