Micellar Transitions in Solvent-Annealed Thin Films of an Amphiphilic Block Copolymer Controlled with Tunable Surface Fields

NCU Institutional Repository > 工學院 > 化學工程與材料工程學系 > 期刊論文 > Item 987654321/49957

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/49957

题名:	Micellar Transitions in Solvent-Annealed Thin Films of an Amphiphilic Block Copolymer Controlled with Tunable Surface Fields
作者:	Chang,CY;Lee,YC;Wu,PJ;Liou,JY;Sun,YS;Ko,BT
贡献者:	化學工程與材料工程學系
关键词:	SPHERE-TO-ROD;DIBLOCK-COPOLYMER;ORDERED ARRAYS;TEMPLATED CHEMISTRY;VARYING SELECTIVITY;AQUEOUS-SOLUTIONS;PHASE-SEPARATION;ADSORPTION;NANOPARTICLES;KINETICS
日期:	2011
上传时间:	2012-03-27 16:27:22 (UTC+8)
出版者:	國立中央大學
摘要:	We investigated the response of symmetric poly(styrene-block-4-vinylpyridine) P(S-b-4VP) diblock copolymer micelles to surface fields of variable strength at free surfaces and substrate interfaces when the micelles as spun were subjected to solvent annealing. Free surface interactions were controlled with solvent annealing in solvents of varied selectivity. On exposure to vapors of a solvent strongly selective for PS, a the micelles retained their spherical shape but grew into cylindrical micelles or lamellar nanostructures via fusion on exposure to slightly selective or neutral solvent vapors. Giant 2D disks that completely wetted PS-grafted substrates resulted when spherical micelles were exposed to vapors of a highly selective solvent for P4VP. The interfacial interactions were controlled through subjecting them to UV/ozone (UVO) substrates initially coated with an end-grafted layer of short PS chains, with which the grafted PS chains became oxidized, degraded, or totally removed through UVO treatment for a controlled duration. When thin films were annealed in vapors of THF, the structural transition from spherical to cylindrical micelles depended on the interfacial field. On applying selective UVO exposure of optimal duration, we fabricated a substrate with two interfacial chemistries that promoted varied micellar species (spherical and cylindrical micelles) with a sharp boundary developed within thin films through solvent annealing for a controlled duration.
關聯:	LANGMUIR
显示于类别:	[化學工程與材料工程學系 ] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	453	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....