Method for improving flashover voltage of silicon rubber

A technology of flashover voltage and silicone rubber is applied in the field of high-voltage power transmission and distribution engineering to achieve the effect of improving flashover voltage, wide application range and low economic cost.

Inactive Publication Date: 2019-11-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented describes methods used during treating silicon-rubbers surfaces called silane gum oxide(SiOx). By mixing two types of flon gas together at high temperatures and pressures, it forms layers made up mostly of Si02and other materials like carbon black particles. These modified areas are then treated with another type of material called silylene sulfonic acid solution before being put into use. Overall this new approach allows for better control over how well these modifications occur compared to previous techniques such as solvent extraction, plasma etchings, etc., resulting in improved performance properties of silica rubber products.

Problems solved by technology

In order to prevent damage caused by static charge buildup during use of these materials, it can be necessary to have them resistant against dynamic charging without losing effectiveness when exposed to certain conditions such as humid environments or contaminated atmospheres. Silicon rubbers offer several technical benefits compared to other types of elastomers like polyethylene terepthalate(PET). They provide better environmental stability due to less volatile organics released from residue after curing. However, they may lose some properties if left untrusted outside air exposures, which makes them difficult to maintain reliability.

Method used

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  • Method for improving flashover voltage of silicon rubber
  • Method for improving flashover voltage of silicon rubber
  • Method for improving flashover voltage of silicon rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The fluorination treatment conditions of the silicone rubber sample: the temperature of the closed reaction chamber is 55°C, the pressure is 1 bar, the fluorine gas accounts for 12% by volume of the reactive mixed gas, and the fluorination treatment time is 60.

[0041] The results are shown in Table 1. After the surface layer of the silicone rubber sample was fluorinated and modified, a fluorinated layer with a thickness of 0.80 μm was formed, and the DC flashover voltage increased by 50.3% compared with that before fluorinated.

Embodiment 2

[0043] The fluorination treatment conditions of the silicone rubber sample: the temperature of the closed reaction chamber is 65°C, the pressure is 0.8 bar, the fluorine gas accounts for 12% by volume of the reactive mixed gas, and the fluorination treatment time is 30 minutes.

[0044]The results are shown in Table 1. After the surface layer of the silicone rubber sample was fluorinated and modified, a fluorinated layer with a thickness of 0.72 μm was formed, and the DC flashover voltage increased by 51.9% compared with that before fluorinated.

Embodiment 3

[0046] The fluorination treatment conditions of the silicone rubber sample: the temperature of the closed reaction chamber is 85°C, the pressure is 1 bar, the fluorine gas accounts for 12% by volume of the reactive mixed gas, and the fluorination treatment time is 2h.

[0047] The results are shown in Table 1. After the surface layer of the silicone rubber sample was fluorinated and modified, a fluorinated layer with a thickness of 1.14 μm was formed, and the DC flashover voltage increased by 35.8% compared with that before fluorinated.

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Abstract

The invention relates to a method for improving flashover voltage of silicon rubber, and the method uses fluorine-containing mixed gas to perform fluoridation on the surface of the silicon rubber in aclosed reaction chamber, so as to improve the flashover voltage of the silicon rubber. Compared with the prior art, the method provided by the invention is simple in craft process, good in controllability and low in economic cost, can uniformly modify insulators or insulating parts of the silicon rubber in any shape and size in bulk, and is especially suitable for commercial application. The flashover voltage generated by the method provided by the invention is obviously improved.

Description

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Claims

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Application Information

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Owner TONGJI UNIV
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