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Micellization and the Surface Hydrophobicity of Amphiphilic Poly(vinylphenol)‐ block ‐Polystyrene Block Copolymers
Author(s) -
Tung PaoHsaing,
Kuo ShiaoWei,
Chan ShihChien,
Hsu ChihHao,
Wang ChihFeng,
Chang FengChih
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700078
Subject(s) - copolymer , amphiphile , micelle , polystyrene , materials science , polymer chemistry , contact angle , chemical engineering , vesicle , morphology (biology) , solvent , self assembly , toluene , chemistry , polymer , composite material , nanotechnology , membrane , aqueous solution , organic chemistry , biochemistry , biology , engineering , genetics
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.