超特高压变电站金具填缝导电有机硅聚合物胶泥的制备及性能  

Preparation and Performance of Conductive Organosilicon Polymer Rubber Paste for Filling Armour Clamp Gaps in Ultrahigh Voltage Substation

作　　者：韩文 唐露甜 杨彬 景龑 王育佳 吴健 白晓春 孙九霄 HAN Wen;TANG Lutian;YANG Bin;JING Yan;WANG Yujia;WU Jian;BAI Xiaochun;SUN Jiuxiao(L State Grid Shaanxi Electric Power Research Institute,Xi’an 710100,Shaanxi,China;Key Laboratory of Textile Fiber and Products(Ministry of Education),College of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,Hubei,China)

机构地区：[1]国网陕西省电力公司电力科学研究院,陕西西安710100 [2]武汉纺织大学材料科学与工程学院纺织纤维与制品教育部重点实验室,湖北武汉430200

出　　处：《武汉大学学报（理学版）》2021年第3期292-298,共7页Journal of Wuhan University:Natural Science Edition

基　　金：国家电网公司总部科技项目(5200-201932102A-0-0-00);湖北省自然科学基金(2019CFB787)。

摘　　要：超特高压变电站金具表面的尖端放电问题是限制其应用的关键。本文将碳纤维(carbon fiber,CF)粉和四针状氧化锌晶须(tetra-needle like ZnO whiskers,T-ZnOw)作为导电填料,加入到有机硅聚合物基体中,制备了一种超特高压变电站金具填缝导电有机硅聚合物胶泥。通过调节T-ZnOw的含量,制备了不同的导电有机硅聚合物胶泥,并对其拉伸性能、微观形貌、流变性能、导电性能等进行了系统分析。研究结果表明:本文制备的导电有机硅聚合物胶泥的拉伸性能和导电性能优异,且界面结合良好。当导电有机硅聚合物胶泥中T-ZnOw的质量分数达到20%时,该胶泥的体积电阻、表面电阻和电导率分别达到0.14Ω·cm、2.5Ω/sq和101.0 S/cm,其拉伸强度、杨氏模量和断裂伸长率分别达到29.9 MPa、6.3 GPa和0.8%。通过填缝实验以及测量防电晕胶泥涂层的非线性系数和表面电阻率的实验,验证了该胶泥的填缝和防电晕效果。由实验结果可知,本文制备的导电有机硅聚合物胶泥的拉伸性能、导电性能和防电晕效果均满足超特高压变电站金具填缝使用要求。Dealing with the point discharge on the surface of the armour clamp in the ultrahigh voltage(UHV)substation becomes the main challenge for its application.Herein,carbon fiber(CF)powders and tetra-needle like ZnO whiskers(T-ZnOw)were used as conductive fillers and added into an organosilicon polymer matrix to prepare conductive organosilicon polymer rubber pastes for filling armour clamp gaps in UHV substation.By adjusting the content of T-ZnOw in the organosilicon polymer,different conductive organosilicon polymer rubber pastes were prepared.The tensile property,micromorphology,rheological properties,and conductivity of the conductive organosilicon polymer rubber pastes were systematically studied.The results show that the conductive organosilicon polymer rubber paste has excellent tensile property and conductivity as well as good interfacial bonding.When the mass fraction of T-ZnOw in the conductive organosilicon polymer rubber paste reaches 20%,the organosilicon polymer rubber paste shows the best comprehensive properties.The volume resistance,surface resistance,and conductivity of the organosilicon polymer rubber paste were 0.14Ω·cm,2.5Ω/sq,and 101.0 S/cm,respectively.The tensile strength,Young’s modulus,and elongation at break reached 29.9 MPa,6.3 GPa,and 0.8%,respectively.Through filling experiments and measuring the non-linear coefficient and surface resistivity of the anti-corona rubber paste coating,the caulking and anti-corona effects of the rubber paste are verified.The experimental results show that the tensile properties,conductivity and anti-corona effect of the conductive organosilicon polymer rubber paste can meet the requirements of filling armour clamp gaps for UHV substation.

关 键 词：碳纤维粉 四针状氧化锌晶须 有机硅聚合物 拉伸性能 导电性能 

分 类 号：V258[一般工业技术—材料科学与工程]