Water-induced morphology evolution of block copolymer micellar thin films

被引：39
|
作者：
Cong, Y [1 ]
Zhang, ZX [1 ]
Fu, J [1 ]
Li, J [1 ]
Han, YC [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
来源：
POLYMER | 2005年 / 46卷 / 14期
基金：
中国国家自然科学基金;
关键词：
micellar thin films; morphology evolution; diblock copolymer;
D O I：
10.1016/j.polymer.2005.04.014
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Morphology evolution of diblock copolymer polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) micellar thin film in the presence of water was investigated. Surface holes with nanoscale cavities in hexagonal order could be induced by water treatment for certain periods. The nanoscale surface cavities could be transformed into isolated nanospheres in a dry environment or back to protruding densely packed spheres by toluene (a selective solvent for PS coronae) treatment. The morphology evolution of micellar thin film strongly depended on the slow evaporation of toluene solvent, the swelling of P4VP cores in the humid environment, and the subsequent movement of PS chains induced by air and toluene. The incompatibility between solvent and block, and that between the unlike blocks also played an important role in the morphology evolution. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5377 / 5384
页数：8
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