標題: Formation of honeycomb structures and superhydrophobic surfaces by casting a block copolymer from selective solvent mixtures
作者: Tung, Pao-Hsiang
Kuo, Shiao-Wei
Jeong, Kwang-Un
Cheng, Stephen Z. D.
Huang, Chih-Feng
Chang, Feng-Chih
應用化學系
Department of Applied Chemistry
關鍵字: block copolymers;films;honeycomb structure;nanostructure;superhydrophobic
公開日期: 2-Feb-2007
摘要: Poly(vinyl phE!nol)-block-polystyrene (PVPh-b-PS) diblock copolymers are synthesized by sequential anionic polymerization with sec-butyl lithium as the initiator. The Pvph-b-PS diblock copolymer is cast (on a substrate) from several solvent mixtures that contain tetrahydrofuran/toluene ratios of 1:0.1, 1:1, and 1:2. After solvent evaporation the resulting films are characterized by SEM, TEM, and contact angle measurements. A honeycomb structure is fabricated from the vesicle structure at relatively low toluene contents. On the contrary, at relatively higIier toluene contents, a micelle structure with porous microspheres is formed, which possesses higher surface roughness and results in film surface superhydrophobicity. The simple method described here that uses common/selective mixed solvents may be easily extended to prepare honeycomb structures and superhydrophobic surfaces simultaneously from a wide variety of block copolymers by carefully controlling the weight composition of the block copolymer and the selective solvent con-tent.
URI: http://dx.doi.org/10.1002/marc.200600612
http://hdl.handle.net/11536/11141
ISSN: 1022-1336
DOI: 10.1002/marc.200600612
期刊: MACROMOLECULAR RAPID COMMUNICATIONS
Volume: 28
Issue: 3
起始頁: 271
結束頁: 275
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