Preparation method of epoxy resin composite material with electric tree resistance characteristic

A technology of epoxy resin and composite materials, which is applied in the field of high-voltage insulating materials, can solve problems that threaten the safe and stable operation of cable transmission systems, partial discharge charges, and electric field concentration, so as to enhance the ability to inhibit the growth of electric branches, promote bonding, and improve The effect of binding density

Inactive Publication Date: 2018-09-28
WUHU BAOYI AMUSEMENT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the manufacturing process of cable terminals, other forms of defects such as air bubbles and impurities may be introduced into the epoxy resin insulation material, causing local electric field concentration, causing partial discharge and charge injection, and then leading

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of the epoxy resin composite material of electric tree resistance characteristic, comprises the following steps:

[0019] (1) Put micron alumina and nano alumina into acetone solvent at a mass ratio of 1:1.2, ultrasonically disperse for 35 minutes, and wait for use; the average particle size of the micron alumina is 5-10 μm, and the average particle size of the nano alumina is The particle size is 10-20nm;

[0020] Add a certain amount of KH-550 silane coupling agent into the water-acetone solution, adjust the pH value to 5.0 with hydrochloric acid, perform hydrolysis, then add alumina dispersion, stir in a constant temperature water bath at 60°C for 40 minutes, filter under reduced pressure, and use Wash with deionized water until there is no chloride ion, and activate the product at 150°C for 8 hours after drying;

[0021] (2) Low temperature plasma treatment:

[0022] Put the activated and modified alumina powder in the discharge area o...

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Abstract

The invention discloses a preparation method of an epoxy resin composite material with an electric tree resistance characteristic. The method comprises the steps that nano-scale alumina and micro-scale alumina are compounded to serve as an inorganic filler; inorganic particles have a function of preventing electric tree growth, so that an electric tree channel is blocked by the inorganic particles, thereby enhancing the ability of epoxy resin to inhibit the electric branch growth; the cooperative use of fillers with different particle sizes can effectively reduce the generation of air gaps between filler particles and an epoxy polymer, and after coupling agent-low temperature plasma synergistic treatment is carried out on the inorganic filler, the bonding between the fillers with differentparticle sizes and an epoxy resin matrix is promoted, thereby effectively improving the bonding density between the filler and the resin matrix; during the curing of the epoxy resin composite material, intermittent ultrasonic treatment and vacuum degassing treatment reduce the generation of the air gaps in an epoxy system, thereby achieving the purpose of inhibiting the generation of a secondaryelectric tree structure.

Description

technical field [0001] The invention belongs to the technical field of high-voltage insulating materials, and in particular relates to a preparation method of an epoxy resin composite material with electric tree resistance characteristics. Background technique [0002] The aging of insulating materials is an important factor affecting the safe operation of cable lines. It mainly includes two forms of electrical aging and thermal aging, and electrical aging caused by electrical trees is a common aging form. During the manufacturing process of cable terminals, other forms of defects such as air bubbles and impurities may be introduced into the epoxy resin insulation material, resulting in local electric field concentration, partial discharge and charge injection, which in turn lead to the formation of electrical dendrite channels. Under the continuous action of the strong electric field, the electric tree branch develops rapidly, eventually leading to insulation breakdown, w...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K9/06C08K3/22C08K9/00
CPCC08K9/06C08K3/22C08K9/00C08K2003/2227C08K2201/003C08K2201/011C08K2201/014C08L63/00
Inventor 张庆
Owner WUHU BAOYI AMUSEMENT EQUIP
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