Polymer insulator with uniform hole distribution on surface and preparation method thereof

A polymer and insulator technology, applied in the directions of organic insulators, inorganic insulators, insulators, etc., can solve the problems of low surface breakdown voltage of polymer insulators, difficult to meet the insulation technical requirements of vacuum high-voltage devices, etc., to improve the surface breakdown voltage, The effect of improved mechanical properties and less influencing factors

Active Publication Date: 2015-09-09
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the surface breakdown voltage of the polymer insulator prepared in the prior art is low and it is difficult to meet the insulation

Method used

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  • Polymer insulator with uniform hole distribution on surface and preparation method thereof
  • Polymer insulator with uniform hole distribution on surface and preparation method thereof
  • Polymer insulator with uniform hole distribution on surface and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) At room temperature, mix evenly the nano fumed silica and styrene monomer of 1% by mass percent, then add 5% by mass percent of silica particles with an average particle diameter of 1 micron to the reaction system, and ultrasonically Stir evenly to obtain a uniformly dispersed stable oxide / monomer mixture;

[0041] 2) Polymerizing the oxide particle / styrene monomer mixture at 90°C to obtain a uniformly dispersed silica particle / polystyrene composite material;

[0042] 3) Processing composite materials into polymer insulators by mechanical processing;

[0043] 4) Use 15% hydrofluoric acid chemical etching to remove the silicon dioxide particles on the surface, and the silicon dioxide particles inside the insulator are protected from dissolution by the polymer;

[0044] 5) Take the insulator out of the acid solution, wash it with deionized water, and dry it, and finally obtain a polystyrene-based composite insulator with a uniform distribution of 1 micron-sized holes ...

Embodiment 2

[0046]1) At room temperature, the mass percentage is 2% of the nano fumed silicon dioxide and methyl methacrylate monomer mixed uniformly, and then adding 3% of the mass percentage of magnesium oxide particles with an average particle diameter of 0.5 microns to the reaction system , ultrasonically stirred evenly to obtain a uniformly dispersed stable magnesium oxide particle / methyl methacrylate monomer mixture;

[0047] 2) Polymerize the oxide particle / methyl methacrylate monomer mixture at 110°C to obtain a uniformly dispersed magnesium oxide particle / polymethyl methacrylate composite material;

[0048] 3) Processing composite materials into polymer insulators by mechanical processing;

[0049] 4) Using 20% ​​hydrochloric acid to chemically corrode the magnesium oxide particles on the surface, and the magnesium oxide particles inside the insulator are protected from dissolution by the polymer;

[0050] 5) Take the insulator out of the acid solution, wash it with deionized wa...

Embodiment 3

[0052] 1) At room temperature, the mass percentage is 2% of nano fumed silica and bisphenol A epoxy resin (containing 2% methyltetrahydrophthalic anhydride curing agent) monomers are mixed uniformly, and then added to the reaction system Ferric oxide particles with an average particle size of 100 nanometers at a mass percentage of 3% are uniformly stirred by ultrasonic to obtain a uniformly dispersed stable oxide / monomer mixture;

[0053] 2) Polymerize the mixture of oxide particles / epoxy resin monomer at 100°C to obtain evenly dispersed ferric oxide particles / epoxy resin composite material;

[0054] 3) Processing composite materials into polymer insulators by mechanical processing;

[0055] 4) Using 20% ​​hydrochloric acid chemical corrosion method to corrode and remove the ferric oxide particles on the surface, and the ferric oxide particles inside the insulator are prevented from being dissolved under the protection of the polymer;

[0056] 5) Take the insulator out of the...

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Abstract

The invention relates to a polymer insulator with uniform hole distribution on the surface and a preparation method thereof. The method mainly includes the following steps: a composite material with uniform oxide particle distribution is obtained through a polymerization reaction by taking fumed silica as a thixotropic agent and oxide particles ranging from tens of nanometers to several microns as a surface pore-forming agent in polymer monomer solution; and after the composite material is machined into a polymer insulator, the oxide particles on the surface are etched and removed by a chemical etching method to obtain a polymer insulator with uniform hole distribution on the surface. By adjusting the size and mass ratio of the oxide particles, control on the hole size and hole density distribution on the surface of the polymer insulation material is realized, the vacuum surface flashover characteristic of the insulator is improved, and the surface breakdown voltage of the insulator is improved. The vacuum surface flashover field strength of an insulator with a special surface structure is improved by 20-50% compared with a pure polymer insulator.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical insulating materials, and particularly relates to a polymer-based composite material insulator with uniform hole distribution on the surface and a preparation method thereof. Background technique [0002] An insulator is a component used for electrical insulation and mechanical fixing. Its function is to connect conductors with different potentials to each other mechanically and to insulate them electrically. With the development of science and technology, the surface flashover phenomenon of insulators has become a prominent problem in vacuum electrical equipment. Surface flashover makes the withstand voltage capacity of insulators far lower than its volume breakdown voltage, and is much lower than that of vacuum at the same distance. gap. With the increasingly prominent role of high-power pulse technology in the national economy and national defense construction, large-scale cutt...

Claims

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Application Information

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IPC IPC(8): H01B3/42H01B3/40H01B3/44H01B3/08H01B17/42H01B17/50H01B19/04C08L25/06C08L33/12C08L63/00C08K3/36C08K3/22
Inventor 刘文元柯昌凤李琳陈昌华汤俊萍付红梅段荔薛西民
Owner NORTHWEST INST OF NUCLEAR TECH
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