臭氧浓度对HTV硅橡胶材料的老化作用

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摘要为了研究电晕放电过程中所产生的臭氧对高温硫化（HTV）硅橡胶老化作用的影响, 利用研制的臭氧老化试验装置, 考虑臭氧浓度及作用时间等因素, 对HTV硅橡胶复合绝缘子试样进行了系统的臭氧老化试验, 并且对老化后的试样进行了扫描电镜（SEM）、傅里叶红外光谱（FTIR）分析、憎水性和热刺激电流（TSC）测试。试验结果表明, 臭氧能够导致硅橡胶材料表面缺陷增多, 憎水性丧失, 而且浓度越高, 老化会越严重。进一步分析得出, 硅橡胶材料在臭氧环境作用下, 材料表面平滑、致密的物理结构被破坏, 产生了孔洞等缺陷, 并且当臭氧环境作用强度达到一定程度后, 材料的物理结构的破坏将更为严重；同时, 化学基团含量发生变化, 试样中Si-O-Si结构减少, 羟基和Si-O键增多, 试样主链和侧链断裂。

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	屠幼萍
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关键词 ： HTV硅橡胶, 臭氧浓度, 老化, 憎水性, 热刺激电流（TSC）微观分析

Abstract：In order to study the influence of ozone created during corona discharge on HTV silicone rubber aging, this paper uses developed ozone generation system container to systematically test the ozone aging characteristic of HTV silicone rubber composite insulators, considering the influences of ozone density and aging time etc. Scanning electron microscopy(SEM) analysis, Fourier transform infrared spectral(FTIR) analysis, hydrophobicity analysis and thermally stimulated current (TSC) test are applied on the aging samples. The test results show that, ozone can result in more defects on silicone rubber surface and loss of hydrophobicity, and the aging becomes more severe under a higher ozone density. Further analysis reveals that the surface smoothness and dense physical structure of silicone rubber are destroyed in the ozone environment and thus defects such as holes appear. And the destruction of physical structure becomes more serious when the intensity of ozone reaches certain a degree. Meanwhile the chemical group content of the sample will change: Si-O-Si bond decreases, hydroxyl and Si-O bond increase, and the main chain and side chain of silicone rubber rupture.

Key words： HTV silicone rubber ozone concentration aging hydrophobicity thermally stimulated current(TSC) microanalysis

收稿日期: 2011-11-02 出版日期: 2013-11-27

PACS:

TM852

基金资助:国家自然科学基金资助项目（50877025）。

作者简介: 屠幼萍女,1966年生,教授,从事电介质材料介电特性、电力系统过电压及其防护等方面的研究。王倩女,1982年生,博士研究生,主要研究方向为电介质材料介电特性、空间电荷测试等。

引用本文:

屠幼萍, 王倩, 李敏, 丁立健. 臭氧浓度对HTV硅橡胶材料的老化作用[J]. 电工技术学报, 2013, 28(1): 21-28. Tu Youping, Wang Qian, Li Min, Ding Lijian. Influence of Ozone Concentration on Deterioration of HTV Silicon Rubber. Transactions of China Electrotechnical Society, 2013, 28(1): 21-28.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I1/21

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