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Macroporous fluoropolymeric films templated by silica colloidal assembly: A possible route to super-hydrophobic surfaces
Authors:Jian Li
Institution:State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China
Abstract:A super-hydrophobic surface was obtained on a three-dimensional (3D) polyvinylidene fluoride (PVDF) macroporous film. The porous films were fabricated through self-assembled silica colloidal templates. The apparent water contact angle of the surface can be tuned from 106° to 153° through altering the sintering temperature and the diameter of the colloidal templates. A composite structure of micro-cavities and nanoholes on the PVDF surface was responsible for the super-hydrophobicity. The wettability of the porous surfaces was described by the use of the Cassie-Baxter model and Wenzel's equation.
Keywords:Super-hydrophobicity  Water repellent  Polyvinylidene fluoride  PVDF  Colloidal crystal  Opal  Macroporous materials
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