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Micellization and the Surface Hydrophobicity of Amphiphilic Poly(vinylphenol)-block-Polystyrene Block Copolymers

✍ Scribed by Pao-Hsaing Tung; Shiao-Wei Kuo; Shih-Chien Chan; Chih-Hao Hsu; Chih-Feng Wang; Feng-Chih Chang

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
424 KB
Volume
208
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

The self‐assembly of PVPh‐b‐PS in different solvents was studied. Upon replacing toluene by THF as the solvent, the morphology of the resulting aggregates change from core‐shell spheres, rod‐like micelles and vesicles to onion‐like aggregates. With increasing block copolymer concentration, morphologies such as honeycomb‐like films, surfaces of aggregated large porous spheres, or pincushion‐like spheres with protruding tubular vesicle aggregates are observed. These surface‐patterned films show significantly enhanced hydrophobicity. The results suggest that a superhydrophobic behavior can be achieved, with a maximum contact angle of 158°, by using the pincushion‐like micellar structure.

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