【摘 要】
：
Surface wetting is an important properties of solid surface,and is also one of the most common behavior of interfacial phenomena.By mimicking lotus leaf,which exhibits special wettability and self-cle
【机 构】
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Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation and School of Materials a
【出 处】
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The 5th International Conference of Bionic Engineering 第五届国际
论文部分内容阅读
Surface wetting is an important properties of solid surface,and is also one of the most common behavior of interfacial phenomena.By mimicking lotus leaf,which exhibits special wettability and self-cleaning properties,man-made superhydrophobic surfaces could be prepared by the combination of micro-and nanoscale hierarchical structures and a low surface energy material.Generally,biomimetic micro-nano hierarchical structure can be constructed by various chemical or physical methods,and then superhydrophobic surface can be prepared through surface modification with the low surface energy materials like fluorinated silane,organosilicon,and long carbon-chain compounds.In this work,a simple one-step method for fabricating a superhydrophobic surface with commercially available submicron poly(tetrafluoroethylene)(PTFE)powder is reported.A film of particles on the surface was formed on the glass surface.SEM results show that the surface was covered by protruding nubs from several microns to tens of microns with hierarchical microstructures,which is like the structure of natural lotus leaf,and make the thin film formed by these PTFE particles show superhydrophobicity.The contact angle and contact angle hysteresis of modified PTFE film were investigated.A WCA of 157.5°and sliding angle of 2.4℃ould be obtained.The superhydrophobic surfaces also show excellent self-cleaning properties,acid,and alkali stability.
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