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.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
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)
关键词
氟化含氢硅油
表面有机化改性
超疏水
防腐
fluoride-polymethylhydrosiloxane（fluoride-PMHS）
surface organic modified
superhydrophobic
anticorrosive
作者简介
通讯作者：郑燕升（1965一），男（汉），教授，硕士；研究方向：有机／无机复合材料；Tel：（0772）2687033；E-mail：zhyansh88@163．com
