A facile method of phase separation was developed for fabricating the superhydrophobic polypropylene/titanium dioxide film .The prepared film showed superhydrophobicity with a high contact angle (169°) and low sliding angle (less than 4°) . Moreover ,the surface showed high contact angle (larger than 160°) for all the solution with pH value ranging from 1 to 14. Scanning electron microscopy images presented a kind of flower-like and microano binary structure on the obtained polypropylene/titanium surface ,which could trap air and form air cushion between water and the surface .Thus this microano hierarchical structure played an important role in the formation of the superhydrophobicity .The superhydrophobic phenomenon of the prepared surface was ana-lyzed according to Cassie theory ,and it was proposed that only about 2.7％ of the water contact surface was contacted with the sub-strate and the rest 97.3％ was contacted with the air cushion .%采用简便的相分离法制备出超疏水PP/TiO2复合薄膜.该复合薄膜表面与水的接触角为169°,滚动角小于4°.pH值为1～14的水溶液在其表面都具有很高的接触角,均大于160°.对其表面进行扫描电子显微镜分析可知,该薄膜具有类花瓣二元微纳米复合微观结构,这种结构可捕获空气,形成水与基底之间的气垫,对表面超疏水性的产生起到了关键作用.用Cassie理论对其表面超疏水进行分析,结果表明,约2.7％ 的面积是水滴和基体接触,而有约97.3％ 的面积是水滴和空气接触.
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