| 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-926 mV 正移至-576 mV，腐蚀电流密度从裸铝片的4.68×105 A/cm2下降至9.07×106 A/cm2，显示出较好的防腐性能。 |
| 关键词: 氟化含氢硅油 表面有机化改性 超疏水 防腐 |
| DOI：10.11933/j.issn.1007-9289.2015.02.016 |
| 分类号: |
| 基金项目: |
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| Preparation and Properties of TiO2/Fluoride-polymethylhydrosiloxane Superhydrophobic and Anticorrosive Coating |
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MO Chunyan, ZHENG Yansheng, WANG Falong, HU Chuanbo, MO Qian
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a. School of Biological and Chemical Engineering, b. Lushan College, Guangxi University of Science and Technology, Liuzhou 545616, Guangxi
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| Abstract: |
| TiO2 particle was surface organic modified by stearic acid with low surface energy since its high surface energy and easy aggregation. Meanwhile, dodecafluoroheptylpropyltrimethoxysilane and polymethylhydrosiloxane(PMHS) were used as raw materials to prepare fluoridepolymethylhydrosiloxane(fluoridePMHS). The composite coating was then formed on the alumium substrate after the modifiedTiO2 was blended with fluoridepolymethylhydrosiloxane through solgel method. Xray 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/fluoridepolymethylhydrosiloxane 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 anticorrosion 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 4.68×105 A/cm2 to 9.07×106 A/cm2. |
| Key words: fluoridepolymethylhydrosiloxane(fluoridePMHS) surface organic modified superhydrophobic anticorrosive |
