纳米TiO_2改性室温固化硅橡胶的力学性能研究  

Study on Mechanical Characteristic of RTV Silicon Rubber Modified by nano-TiO_2

作　　者：王英[1] 于萍[1] 罗运柏[1] 钟家柽[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072

出　　处：《高电压技术》2006年第7期10-12,共3页High Voltage Engineering

基　　金：湖北省自然科学基金资助项目(2002AB057)

摘　　要：为进一步提高RTVSR的各项性能,近年来虽有针对其各项性能的纳米粒子改性研究,但是从力学性能上的研究和成果并不多。介绍了用金红石型纳米级TiO2共混改性RTVSR,得到一种新型的耐老化和力学性能优良的防污闪绝缘复合涂料。通过研究复合材料的力学性能并与空白RTVSR进行对比,进一步采用FT-IR、XRD、SEM等先进仪器分析了纳米复合材料的化学结构,确定了当TiO2添加量为6%时,断裂伸长率达到了345%,拉伸强度为0.27 MPa。从复合材料的基本电气性能测试结果可知,通过纳米粒子改性的RTVSR依然保持了良好的绝缘和憎水性能。试验结果表明,改性后的复合涂料力学和憎水性能优异,且保持了良好的电气性能。For the past few years, there are some research about the nano-particles modification of RTVSR, but not have favorable research findings on mechanical properties and other performance. A new insulated coating of pollution flashover for outdoor insulators is discussed, which is modified from the RTV silicone rubber by blending with rutile nano-TiO2 in present paper. The mechanical characteristic of the nano-composite have been investigated, h is analyzed and compare with that of pure RTV silicone rubber, with the help of FT-IR and FT-Raman,XRD, SEM, and also the chemical frame of RTV silicone rubber. The results show that the optimal content of nano-TiO2 in the RTV silicone rubber is six percents. The elongation at break is 345 %, and tensile strength is 0. 27 MPa. The experiment indicates that nano-composite has excellent mechanical capability and outstanding hydrophobicty, and remains good electrical properties.

关 键 词：纳米TIO2 RTVSR 拉伸强度 断裂伸长率 绝缘 憎水性 

分 类 号：TM215.2[一般工业技术—材料科学与工程]