改性纳米TiO_2/PTFE复合氟碳防污闪涂层的制备及其性能  

Preparation and Properties of Modified Nano-TiO_2/PTFE Composite Fluorocarbon Anti-Pollution Flashover Coating

作　　者：钟娴[1] 刘海[1] 李超成[1] 周艺[1] 周永言[2] 盘思伟[2] 朱志平[1] 

机构地区：[1]长沙理工大学化学与生物工程学院,湖南长沙410114 [2]广东电网公司电力科学研究院,广东广州510080

出　　处：《材料保护》2015年第11期11-14,40-41,共4页Materials Protection

基　　金：国家自然科学基金资助项目(21171027);湖南省科技厅科技计划重大专项(2012FJ1003);湖南省科技厅科技计划重点项目(2013GK2006)资助

摘　　要：为防止输电线路上污闪事故的发生,以氟碳树脂(FEVE)为成膜剂,以改性纳米TiO_2和聚四氟乙烯(PTFE)微粉为复合填料,制备了一种新型的有自清洁效应的纳米TiO_2/PTFE复合氟碳防污闪涂料。采用傅里叶变换红外光谱仪(FTIR)表征纳米TiO_2改性前后的结构,通过扫描电镜(SEM)、X射线光电子能谱仪(XPS)、接触角测量仪对复合氟碳防污闪涂层表面的微观结构及疏水性进行了分析,对涂层表面的光催化自清洁性和疏水性保持机制进行了深入探讨。结果表明:改性纳米TiO_2和PTFE通过化学键合作用在复合氟碳防污闪涂层表面构建了微纳复合粗糙结构,与水静态接触角达134°,涂层不仅具有优良的理化、电气绝缘性能,而且还具有有效的自清洁功能和疏水性保持性能。With fluorocarbon resin(FEVE) as coating- forming agent,and the modified nano- TiO_2 and polytetrafluoroethylene(PTFE) micro-powders as complex fillers,a new kind of nanoTiO_2/PTFE composite fluorocarbon anti-pollution flashover coatings with self-cleaning property was prepared.Fourier transform infrared spectroscopy(FTIR) was used to characterize the structure change of nano-TiO_2 particles before and after modification.Furthermore,the surface microstructure and hydrophobicity of the coating were analyzed by scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS) and contact angle measurement instrument,and afterword the mechanisms of hydrophobicity persistence and photocatalysis self- cleaning were further discussed.Results showed that the micro/nano composite rough structures were formed by the chemical bonding effect between TiO_2 and PTFE on the composite coating surface,and static water contact angle of the coating was up to 134°.According to the above,the composite coating had not only excellent physical and chemical properties and electrical insulation properties,but also effective self- cleaning capability and hydrophobicity persistence performance.

关 键 词：氟碳复合涂层 改性纳米TiO2 PTFE 微观结构 自清洁性 疏水性 

分 类 号：TB306[一般工业技术—材料科学与工程]