HTV硅橡胶用不同高岭土染污后的憎水迁移特性对比

发布时间：2018-06-07 22:49

本文选题：硅橡胶 + 高岭土　；参考：《高电压技术》2014年04期

【摘要】：复合绝缘子人工污秽试验中,惰性物质的特性对染污试品的憎水性迁移特性影响显著,选用合适的惰性物质,对完善人工污秽试验方法,增强试验结果的对比性有显著意义。为此,选用3类高岭土作为惰性物质,对比研究了染污高温硫化硅橡胶(HTV)的憎水性迁移过程。针对3类高岭土染污试品憎水性迁移特性差异,通过扫描电镜、热重分析以及傅里叶变换红外光谱分析,对3类高岭土的微观形态及官能团进行了分析。试验结果表明:污层获取憎水性的能力由好至差分别是分析纯高岭土、化学纯高岭土及工业原料高岭土;高岭土对高温硫化硅橡胶憎水性迁移过程的影响,与其自身的微观特性有密切联系;目前市场上所提供的分析纯高岭土及化学纯高岭土,很有可能是高岭土热活化后的产物—偏高岭土。该研究结果对于复合绝缘子人工污秽试验惰性物质的选取有参考意义,相关结论可用于辅助分析染污硅橡胶憎水性迁移特性。
[Abstract]:In the artificial pollution test of composite insulators, the characteristics of inert substances have a significant effect on the hydrophobicity of the polluted samples. The selection of suitable inert substances is of great significance to the improvement of artificial pollution test methods and the enhancement of the contrast of the test results. Therefore, the hydrophobicity migration process of contaminated high temperature vulcanized silicone rubber (HTV) was studied by using three kinds of kaolin as inert substances. Aiming at the difference of hydrophobicity migration characteristics of three kinds of kaolinite, the microscopic morphology and functional groups of three kinds of kaolin were analyzed by scanning electron microscope, thermogravimetric analysis and Fourier transform infrared spectroscopy. The results show that the hydrophobicity of waste layer from good to bad is the analysis of pure kaolin, chemical kaolin and industrial raw material kaolin, and the effect of kaolin on hydrophobicity migration process of high temperature vulcanized silicone rubber. The analytical kaolin and chemical pure kaolin provided in the market at present are probably the product of thermal activation of kaolin-metakaolin. The results are useful for the selection of inert materials in artificial contamination test of composite insulators. The relevant conclusions can be used to analyze the hydrophobic migration characteristics of contaminated silicone rubber.
【作者单位】：清华大学深圳研究生院;中国电力科学研究院;
【基金】：国家自然科学基金(51377093)~~
【分类号】：TM215.2

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