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Arc-resistant silicon composite material, preparation method and use thereof

A composite material and silicone rubber technology, applied in the field of materials, can solve the problem of low tracking resistance and other problems, and achieve the effect of excellent performance improvement, improved performance improvement effect, and uniform dispersion.

Active Publication Date: 2015-11-18
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the anti-tracking performance of the silicone rubber disclosed in the above-mentioned prior art is still low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] The 20 μm vermiculite was crushed and sieved, and then the vermiculite powder was heated and expanded in a heating furnace at 900° C. for 1 min, ground and sieved to obtain the expanded vermiculite with a particle size of 600 mesh.

[0093] Mix 50g of expanded vermiculite with 50g of tetraethyl orthosilicate and 332g of absolute ethanol, then dropwise add 1mol / L hydrochloric acid aqueous solution to pH = 2, stir in a water bath at 40°C for 480min, cool, and filter with deionized water Wash with absolute ethanol until the pH is 7, put it into a ball mill for wet milling, the speed of the ball mill is 700r / min, the ball milling time is 100min, put it into an oven for drying at 60°C.

[0094] Then use a ball mill for ball milling, the rotating speed of the ball mill is 200r / min, and the ball milling time is 720min to obtain the expanded nano vermiculite.

[0095] Get 6g of nano-expanded vermiculite, 1g of vinyltrimethoxysilane, 0.5g of 2,5-dimethyl-2,5-bis(tert-butylperoxy...

Embodiment 2

[0099] Crush and sieve the 5mm vermiculite, then put the vermiculite powder into a heating furnace at 900°C for heating and expansion treatment for 1 min, grind and sieve, the particle size is 250 mesh, and the expanded vermiculite is obtained.

[0100] Take 30g of expanded vermiculite, mix with 270g of tetraethyl orthosilicate, and 119g of absolute ethanol, then add dropwise 1mol / L hydrochloric acid aqueous solution until the pH is 5, stir in a water bath at 70°C for 30min, cool, and centrifugally filter with deionized water and Wash with anhydrous ethanol until the pH is 7, put it into a ball mill for wet grinding, the speed of the ball mill is 200r / min, the ball milling time is 500min, put it in an oven for drying at 40°C, and then use a ball mill for ball milling, the ball mill speed is 700r / min, ball mill The time is 20 minutes, and nanometer expanded vermiculite is obtained.

[0101] Get 29g of nano-expanded vermiculite and vinyltriethoxysilane 4g, 2,5-dimethyl-2,5-bis(t...

Embodiment 3

[0105] The 25 μm vermiculite was crushed and sieved, and then the vermiculite powder was heated and expanded in a heating furnace at 900°C for 1 min, ground and sieved, and the particle size was 500 mesh to obtain the expanded vermiculite.

[0106] Take 40g of expanded vermiculite, mix with 80g of tetraethyl orthosilicate, and 354g of absolute ethanol, then add dropwise 1mol / L aqueous hydrochloric acid until the pH is 3, stir in a water bath at 50°C for 300min, cool, and centrifugally filter with deionized water and Wash with absolute ethanol until the pH is 7, put it into a ball mill for wet grinding, the ball mill speed is preferably 350r / min, and the ball milling time is 400min, put it in an oven for drying at 70°C, and then use a ball mill for ball milling, the ball mill speed is 600r / min, The ball milling time is 60 minutes to obtain nanometer expanded vermiculite.

[0107] Get 16g of nano-expanded vermiculite and vinyl tris(β-methoxyethoxy)silane 3g, 2,5-dimethyl-2,5-bis...

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Abstract

The invention provides an arc-resistant silicon composite material, a preparation method and use thereof. The composite material is mainly prepared and obtained by the following raw materials: (A) at least one silicon rubber; (B) modified nano-expanded vermiculite; and the weight percentage of the component (B) modified nano-expanded vermiculite accounts for 9% to 39% of the sum of the weight percentages of the component (A) and the component (B). The preparation method comprises the following steps: firstly adding a silane coupling agent to the modified nano-expanded vermiculite in a ball-milling machine, and then mixing with silicon rubber. The composite material provided by the invention has excellent anti-creepage trace performance and mechanical performance, also has high electrical performance such as disruptive strength, flame retardant performance and machinable performance, and can be used for preparing HVDC transmission line composite insulators.

Description

technical field [0001] The invention belongs to the field of materials. Specifically, the invention relates to an arc-resistant silicon rubber composite material, a preparation method and its application, and more specifically to a light-weight arc-resistant silicon rubber composite material, a preparation method and its application. Background technique [0002] In high-voltage transmission insulators, high-temperature vulcanized silicone rubber composite insulators have been widely used in recent years. Compared with traditional glass and ceramic insulators, high-temperature vulcanized silicone rubber composite insulators have small size, light weight, easy transportation and installation, and excellent hydrophobicity. , high strength and good aging resistance, so it has developed rapidly. [0003] The current high-temperature vulcanized silicone rubber composite insulator is mainly formed by mixing and vulcanizing silicone rubber, filler and vulcanizing agent. Its resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08K9/06C08K9/00C08K3/34C08K3/36
Inventor 薛杨徐志磊张冬海李欣欣韩世健沈辉孙浩王好盛钱西慧陈运法
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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