A kind of silicone rubber-based DC cable accessory material and preparation method thereof

A DC cable, silicone rubber technology, applied in textiles, papermaking, fiber chemical characteristics, etc., can solve the problems of reducing the anti-breakdown performance of cable accessory materials, affecting the overall performance of cable accessory materials, etc., to reduce the probability of failure and improve electrical conductivity The effect of gradient, homogenized electric field distribution

Inactive Publication Date: 2021-03-02
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, when preparing nonlinear cable accessory materials, the conductance nonlinear performance of the cable accessory material is often improved while the anti-breakdown performance of the cable accessory material is reduced, which affects the overall performance of the cable accessory material.

Method used

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  • A kind of silicone rubber-based DC cable accessory material and preparation method thereof
  • A kind of silicone rubber-based DC cable accessory material and preparation method thereof
  • A kind of silicone rubber-based DC cable accessory material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] The steps of a preparation method of a silicone rubber-based DC cable accessory material are as follows:

[0032] 1. Copper acetate monohydrate: calcium nitrate tetrahydrate: n-tetrabutyl titanate = 1:3:4 in molar ratio, and volume ratio according to the volume of n-tetrabutyl titanate: n-tetrabutyl titanate: anhydrous ethanol: Acetic acid=3:50:1, respectively measure 20ml absolute ethanol, 0.4ml acetic acid, 1.2ml n-tetrabutyl titanate, and respectively weigh 0.517g copper acetate monohydrate and 0.218g calcium nitrate tetrahydrate, mix absolute ethanol, The acetic acid is poured into the beaker in turn and stirred evenly, the copper acetate monohydrate is added to the above mixed solution and it is completely dissolved, and then calcium nitrate tetrahydrate is added to the mixed solution to completely dissolve the calcium nitrate tetrahydrate to obtain a clear mixed solution; Add n-tetrabutyl titanate to the clear mixed solution, and continue stirring for 40 minutes a...

Embodiment 2

[0041] A preparation method of a silicone rubber-based DC cable accessory material is as follows:

[0042] One, copper acetate monohydrate in molar ratio: calcium nitrate tetrahydrate: n-tetrabutyl titanate=1:3:4, and according to the volume ratio of n-butyl titanate: n-tetrabutyl titanate: dehydrated alcohol: Acetic acid=3:50:1, measure 20ml dehydrated alcohol, 0.4ml acetic acid, 1.2ml n-tetrabutyl titanate and take 0.517g monohydrate copper acetate and 0.218g calcium nitrate tetrahydrate respectively, dehydrated alcohol, Acetic acid was poured into the beaker in turn and stirred evenly, copper acetate monohydrate was added to the above mixed solution and dissolved completely, and then calcium nitrate tetrahydrate was added to the mixed solution to completely dissolve calcium nitrate tetrahydrate to obtain a clear mixed solution; Add n-butyl titanate to the clarified mixed solution, and continue stirring at a stirring speed of 200r / min for 40min to disperse n-butyl titanate e...

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Abstract

The invention belongs to the field of DC cable accessory materials, and in particular relates to a silicone rubber-based DC cable accessory material and a preparation method thereof. In the present invention, copper calcium titanate nanofibers of a certain size are prepared by electrospinning and muffle furnace calcination processes, and the copper calcium titanate nanofibers are evenly dispersed in liquid silicone rubber by in-situ polymerization, and then vulcanized by hot pressing. A silicone rubber-based DC cable accessory material was prepared. The cable material prepared by the present invention has a relatively stable breakdown electric field strength, a lower threshold electric field strength and a higher nonlinear coefficient, and solves the problem of the difference in the electrical conductivity of the material and the space charge on the interface in the DC high-voltage cable accessories. The technical problem of electric field distortion caused by accumulation. The preparation method of the invention has simple process and required equipment, low cost and easy implementation.

Description

technical field [0001] The invention belongs to the field of DC cable accessory materials, in particular to a silicone rubber-based DC cable accessory material and a preparation method thereof. Background technique [0002] The rapid progress of science and technology has prompted the continuous improvement of the transmission voltage level. For the DC high-voltage cable transmission line, the cable accessories are its weakest link. The electric field distribution in the cable accessories is seriously distorted due to the difference in the electrical conductivity of the components in the accessories, the temperature gradient and the accumulation of interfacial space charges, resulting in a decrease in the insulation performance of the cable accessories, and even breakdown, resulting in major power accidents. [0003] Silicone rubber is a kind of high polymer with stable chemical structure, which has good electrical insulation, aging resistance, temperature characteristics an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K7/08D01F9/10
CPCC08K7/08C08K2201/003C08K2201/004D01F9/10C08L83/04
Inventor 迟庆国李振张天栋陈庆国王暄赵洪
Owner HARBIN UNIV OF SCI & TECH
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