J. Mater. Sci. Technol. ›› 2008, Vol. 24 ›› Issue (05): 693-699.

• 论文 • 上一篇    下一篇

Morphologies and Superhydrophobicity of Hybrid Film Surfaces Based on Silica and Fluoropolymer

曲爱兰;文秀芳;皮丕辉;程江;杨卓如   

  1. 华南理工大学化工与能源学院
  • 收稿日期:2007-04-02 修回日期:2007-09-17 出版日期:2008-09-28 发布日期:2009-10-10
  • 通讯作者: 曲爱兰

Morphologies and Superhydrophobicity of Hybrid Film Surfaces Based on Silica and Fluoropolymer

Ailan QU, Xiufang WEN, Pihui PI, Jiang CHENG, Zhuoru YANG   

  1. School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2007-04-02 Revised:2007-09-17 Online:2008-09-28 Published:2009-10-10
  • Contact: Xiufang WEN

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摘要： 利用表面改性后具有不同官能团的SiO2粒子制备类似草莓和梅花状的复合粒子，然后利用低表面能的含氟硅聚合物和具有不同形状的SiO2复合粒子制备出超疏水性涂膜，水接触角达174.2±2°，滞后角几乎接近0°。并相互通过原子力显微镜、扫描电镜和水接触角的测试对膜结构及性能进行了表征，探讨了其表面微观结构与表面粗糙度和表面疏水性能的关系，结果表明含单一粒径涂膜表面疏水性能随粗糙度的增加而增加，而由类似草莓结构的复合粒子构成了符合Cassie模型的非均相界面，单纯的粗糙度因子不能反映水接触角的变化，复合粒子在膜表面的无规则排列赋予涂膜表面不同等级的粗糙度，使得水滴与涂膜表面接触时能够形成高的空气捕捉率和较小的粗糙度因子，这与在涂膜表面能形成自组装分子膜的氟硅乳液共同作用赋予了涂膜表面超疏水性能。

关键词: 超疏水性, 双微观结构, 纳米复合粒子, 含氟硅

Abstract: Fluoropolymer and different kinds of silica particles were used for controlling surface chemistry and morphology, respectively. A superhydrophobic surface originated from strawberry-like or quincunx-shaped composite silica particles was obtained. The dual size particles are obtained by utilizing the graft of different modified silica particles with epoxy functional group and amine functional group. This makes the surface of film form a composite interface to have irregular binary structure which plays an essential role in trapping air between the substrate surface and the liquid droplets to be necessary for high contact angle and low contact angle hysteresis. The maximum contact angle for water on the hybrid film is about 174±2° and the contact angle hysteresis is less than 2°. The surface morphologies, roughness and the wettability on the surface of films containing different structural silica particles were compared. It was shown that the hierarchical irregularly structure with a low roughness factor and high air-trapped ratio is indispensable for superhydrophobic surface. Although this structural surfaces based on composite silica particles play a vital role in governing the surface wettability, it is necessary to combine with a low surface energy to make the surface superhydrophobic.

Key words: Superhydrophobicity, Hierarchical irregularly structure, Silica particles, Fluoropolymer