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采用疏水纳米粉体压片法和岩心吸附法构建了具有微纳米结构的表面,测试了这些表面的接触角,拍摄了水滴在吸附纳米粒子的岩石表面的滚动过程照片,采用扫描电子显微镜(scanning electron microscope,SEM)检测了表面的微结构.实验结果表明:无机纳米粒子经弱疏水性材料修饰后,其表面润湿性由强亲水变为强疏水;疏水纳米粒子吸附表面的接触角均大于120°,滚动角约7°,显示出超疏水特性;SEM照片显示,这些超疏水表面是具有不规则微纳米结构的气固复合面,符合Cassie-Baxter的复合表面模型.
Surfaces with micro-nano structure were constructed by hydrophobic nano-powder tablet method and core adsorption method. The contact angles of these surfaces were measured. The rolling process of water droplets on the rock surface of the adsorbed nano-particles was taken. Scanning electron microscopy electron microscope, SEM). The experimental results show that the surface wettability of inorganic nanoparticles changed from strong hydrophilic to strongly hydrophobic when modified with weakly hydrophobic materials. The contact angle of hydrophobic nanoparticles Greater than 120 °, and a roll angle of about 7 °, showing superhydrophobic properties. SEM images show that these superhydrophobic surfaces are gas-solid composite surfaces with irregular micro-nano structure and meet the Cassie-Baxter composite surface model.