A corrosion-resistance superhydrophobic TiO2 film
首发时间:2012-04-18
Abstract:A superhydrophobic TiO2 film with water contact angle greater than 170 on Hastelloy substrate was fabricated through simply dip-coating method from TiO2 precursor solution containing TiO2 nanoparticles with the average diameter 25 nm, followed by heat-treatment and modification with fluoroalkylsilane (FAS) molecules. The as-obtained sample was characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), and water contact angle measurement respectively. Moreover, the dynamic light scattering (DLS) size distribution of TiO2 aggregated particles in the TiO2 prucursor solution containing P25 particles was evaluated by Laser Particle Sizer. It is found that the TiO2 nanoparticles in TiO2 precursor solution play a crucial role to form high superhydrophobicity. Simultaneously, the superhydrophobic TiO2 film still showed great superhydrophobicity after corroded with strong acid or alkali solutions and protected the substrate from corrosion which should be critical to the potential application in industry.
keywords: TiO2 film superhydrophobicity corrosion-resistance
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耐腐蚀的超疏水TiO2薄膜
摘要:采用溶胶凝胶法通过提拉技术于基体上制备出TiO2薄膜,利用于溶胶中加入TiO2纳米粒子改善TiO2薄膜表面的微结构,通过表面修饰低表面能物质1H,1H,2H,2H-十七氟癸基三甲氧基硅烷(FAS)显示优良的超疏水性能,其与水的接触角高170 。通过X 射线粉末衍射仪、扫描电子显微镜、X光电子能谱和水接触角测试仪对TiO2薄膜进行表征。通过动态光散射粒度测试仪分析TiO2纳米粒子在溶胶中的分散状态。结果表明,TiO2纳米粒子的加入对形成超疏水表面具有至关重要的作用,并且所制备的超疏水TiO2膜具有良好的耐腐蚀性能。
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