聚二甲基硅氧烷/碳纳米管导电超疏水复合涂层的制备及性能  

Preparation and properties of electrically conductive superhydrophobic PDMS/MWCNTs coatings

作　　者：薛朝华[1] 张磊[1] 贾顺田[1] 

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2017年第2期17-22,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51572161;51372146)

摘　　要：将聚二甲基硅氧烷(PDMS)与十八胺改性的多壁碳纳米管(MWCNTs)共混后喷涂于玻璃表面制得具有一定耐磨性的导电超疏水复合涂层.十八胺的修饰有效改善了MWNNTs在有机溶剂中的分散性,提高了喷涂过程的便捷性及可重复性,确保了碳纳米管在复合涂层中分布的均匀性和连续性.通过使用扫描电镜、接触角测量仪、四探针电阻率测试仪等对所得涂层进行测试表征,揭示了涂层液中两组分的配比对涂层微观形貌、疏水性、导电性及耐磨性的影响规律.结果表明,增大PDMS的配比有利于提高超疏水涂层的机械耐磨性能,但是过量的PDMS不仅会降低涂层表面的粗糙度从而引起超疏水性能的下降,而且会增强聚合物PDMS的绝缘作用从而使涂层的导电性能下降.由于PDMS对多种基质都有比较好的粘结性,故所得涂层还可适用于其他基质,具有广阔的应用前景.Electrically conductive superhydrophobic coatings with a certain anti-abrasion stability on glass substrates were fabricated by spraying suspension of poly（dimethylsiloxane）（PDMS） and octadecylamine functionalized multi-walled carbon nanotubes（MWCNTs）.The dispersibility of MWCNTs in solution could be improved effectively by modification with octadecylamine,which improved the convenience and repeatability of spraying process and made the distribution of MWCNTs in the composite coating uniform and continuous.Scanning electron microscope,contact angle system and resistivity tester were used to characterize the properties of the coatings.The influence of the concentration of PDMS and MWCNTs on microstructure,hydrophobicity,electrical conductivity and wear resistance of the coatings were discussed.The result shows that increasing the addition of PDMS favors the enhancement of anti-abrasion stability of the coatings.However,excess amount of PDMS could cause decline of the superhydrophicity due to the decrease of roughness,and weaken the electrical conductivity due to the electrical insulation of PDMS.PDMS has good adhesiveness on various substrates,so the coating could be also applied to other substrates and has a broad application prospect.

关 键 词：聚二甲基硅氧烷 碳纳米管 导电 超疏水 涂层 

分 类 号：O647.5[理学—物理化学]