Water-induced morphology evolution of block copolymer micellar thin films
Water-induced morphology evolution of block copolymer micellar thin films
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DOI：
10.1016/j.polymer.2005.04.014
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发表时间：
2005-06-27
期刊：
影响因子：
4.6
通讯作者：
Han, YC
中科院分区：
文献类型：
--
作者：
Cong, Y;Zhang, ZX;Han, YC
研究了两嵌段共聚物聚苯乙烯-嵌段-聚（4-乙烯基吡啶）（PS-b-P4 VP）胶束薄膜在水存在下的形态演变。通过一定时间的水处理，可以诱导出具有六方有序纳米孔洞的表面孔洞。纳米级表面空腔可以在干燥的环境中转化为孤立的纳米球，或者通过甲苯（PS冠的选择性溶剂）处理回到突出的密集堆积的球。胶束薄膜的形貌演化强烈依赖于甲苯溶剂的缓慢蒸发、P4 VP核在潮湿环境中的溶胀以及随后由空气和甲苯引起的PS链的运动。溶剂与嵌段之间以及不同嵌段之间的不相容性也对形貌演化起着重要作用。(c)2005爱思唯尔有限公司保留所有权利。
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.