交联聚乙烯与硅橡胶界面涂抹不同硅脂对其电荷特性的影响

发布时间：2019-05-23 04:09

【摘要】：实际电缆附件安装时一般会在附件主绝缘与电缆绝缘界面均匀涂覆硅脂,但不同种类的硅脂对界面特性的影响尚未见报道。为此,选用2种常用工业硅脂(普通硅脂(CSG)和氟化硅脂(FSG)),采用电声脉冲法(PEA)测试不同硅脂涂层对交联聚乙烯/硅橡胶(XLPE/SR)界面电荷特性的影响;并通过机械拉伸实验验证硅脂对硅橡胶材料的溶胀效应。结果表明:氟化硅脂具有较强的电负性,使得试样界面更易于积聚电荷;普通硅脂和氟化硅脂对硅橡胶都具有溶胀作用,进而导致XLPE/SR夹层界面正电荷向硅橡胶体内迁移;老化后,涂覆普通硅脂的硅橡胶力学性能的下降程度更为明显。
[Abstract]:When the actual cable accessories are installed, the main insulation of the accessories and the insulation interface of the cables will be uniformly coated with silicone grease, but the influence of different kinds of silicone grease on the interface characteristics has not been reported. For this reason, two kinds of common industrial silicone grease (ordinary silicone grease (CSG) and fluorosilicone grease (FSG),) were used to test the effect of different silicone grease coatings on the interfacial charge characteristics of crosslinked polyethylene / silicone rubber (XLPE/SR) by electroacoustic pulse (PEA). The swelling effect of silicone grease on silicone rubber was verified by mechanical tensile test. The results show that fluoride silicone grease has strong electronegativity, which makes it easier to accumulate charge at the interface of the sample, and both ordinary silicone grease and fluorosilicone grease have swelling effect on silicone rubber, which leads to the migration of positive charge at the interface of XLPE/SR interlayer to silicone rubber. After aging, the mechanical properties of silicone rubber coated with ordinary silicone grease decreased more obviously.
【作者单位】：西安交通大学电力设备电气绝缘国家重点实验室;上海捷锦电力新材料有限公司;上海市电力公司奉贤供电公司;
【基金】：国家自然科学基金(51377131) 国家重点基础研究发展计划(973计划)(2011CB209404)~~
【分类号】：TM247

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