TiO_2/氟化含氢硅油超疏水防腐涂层的制备及性能  

Preparation and Properties of TiO_2/Fluoride-polymethylhydrosiloxane Superhydrophobic and Anticorrosive Coating

作　　者：莫春燕[1] 郑燕升[1,2] 王发龙[1] 胡传波[1] 莫倩[1] 

机构地区：[1]广西科技大学生物与化学工程学院,广西柳州545616 [2]广西科技大学鹿山学院,广西柳州545616

出　　处：《中国表面工程》2015年第2期132-137,共6页China Surface Engineering

基　　金：广西教育厅科研项目(201012MS123)

摘　　要：针对无机TiO2纳米粒子表面能较大且易团聚的问题,利用低表面能物质硬脂酸使TiO2纳米粒子表面有机化,并以十二氟庚基丙基三甲氧基硅烷和含氢硅油(PMHS)为原料制备氟化含氢硅油,将改性后的TiO2与氟化含氢硅油混合,用溶胶凝胶法在铝基底上形成改性TiO2/氟化含氢硅油复合涂层。涂层的表面形貌和疏水性采用X射线衍射仪、红外光谱、扫描电镜和接触角分析仪等进行表征,防腐性能采用极化曲线和交流阻抗等电化学法进行测定。结果表明:改性TiO2/氟化含氢硅油复合涂层表面结构丰富,其与水的静态接触角为152°,滚动角为7°,说明涂层具备超疏水性能;其腐蚀电位从裸铝片的-926mV正移至-576mV,腐蚀电流密度从裸铝片的4.68×10-5 A/cm2下降至9.07×10-6A/cm2,显示出较好的防腐性能。TiO2 particle was surface organic modified by stearic acid with low surface energy since its high surface energy and easy aggregation.Meanwhile,dodecafluoroheptyl-propyl-trimethoxysilane and polymethylhydrosiloxane（PMHS）were used as raw materials to prepare fluoride-polymethylhydrosiloxane（fluoride-PMHS）.The composite coating was then formed on the alumium substrate after the modified-TiO2 was blended with fluoride-polymethylhydrosiloxane through sol-gel method.X-ray diffracmeter,infrared spectroscopy,scanning electron microscopy（SEM）and contact angle analyzer were used to describe the hydrophobicity and surface structure of the composite coating.The results show the TiO2/fluoride-polymethylhydrosiloxane composite coating with a static contact angle of 152°and a rolling angle of 7°has rich surface structure.The corrosion of the composite coating is characterized by electrochemical methods,such as polarization curve measurement and alternating current impedance apectroscopy,The results show that the TiO2/fluoridepolymethylhydrosiloxane composite coating has a good anti-corrosion performance,compared with the bare alumium sample,its corrosion potential has a positive shift from-926 mV to-576 mV and its corrosion electric current decreases from 4.68×10^-5 A/cm^2 to 9.07×10^-6 A/cm^2.

关 键 词：氟化含氢硅油 表面有机化改性 超疏水 防腐 

分 类 号：TG174.46[金属学及工艺—金属表面处理] TQ637[金属学及工艺—金属学]