Simultaneous tuning of chemical composition and topography of copolymer surfaces: Micelles as building blocks

doi:10.1002/cphc.200700032

CORC > 化学研究所 > 中国科学院化学研究所

	Simultaneous tuning of chemical composition and topography of copolymer surfaces: Micelles as building blocks
	Zhao, Ning; Zhang, Xiaoyan; Zhang, Xiaoli; Xu, Jian
刊名	CHEMPHYSCHEM
	2007-05-14
卷号	8 期号:7 页码:1108-1114
关键词	Block Copolymers Micelles Phase Separation Superhydrophobic Surface Chemistry
ISSN号	1439-4235
DOI	10.1002/cphc.200700032
英文摘要	A simple method is described for controlling the surface chemical composition and topography of the diblock copolymer poly-(styrene)-b-poly(dimethylsiloxane)(PS-b-PDMS) by casting the co-polymer solutions from solvents with different selectivities. The surface morphology and chemical composition were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), respectively, and the wetting behavior was studied by water contact angle (CA) and sliding angle (SA) and by CA hysteresis. Chemical composition and morphology of the surface depend on solvent properties, humidity of the air, solution concentration, and block lengths. If the copolymer is cast from a common solvent, the resultant surface is hydrophobic, with a flat morphology, and dominated by PDMS on the air side. From a PDMS-selective solvent, the surface topography depends on the morphology of the micelles. Starlike micelles give rise to a featureless surface nearly completely covered by PDMS, while crew-cut-like micelles lead to a rough surface with a hierarchical structure that consists partly of PDMS. From a PS-selective solvent, however, surface morphology can be controlled by vapor-induced phase separation. On the basis of the tunable surface roughness and PDMS concentration on the air side, water repellency of the copolymer surface could be tailored from hydrophobic to super-hydrophobic. In addition reversible switching behavior between hydrophobic and super-hydrophobic can be achieved by exposing the surface to solvents with different selectivities.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000246646900019
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/61829]
专题	中国科学院化学研究所
通讯作者	Xu, Jian
作者单位	Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Ning,Zhang, Xiaoyan,Zhang, Xiaoli,et al. Simultaneous tuning of chemical composition and topography of copolymer surfaces: Micelles as building blocks[J]. CHEMPHYSCHEM,2007,8(7):1108-1114.
APA	Zhao, Ning,Zhang, Xiaoyan,Zhang, Xiaoli,&Xu, Jian.(2007).Simultaneous tuning of chemical composition and topography of copolymer surfaces: Micelles as building blocks.CHEMPHYSCHEM,8(7),1108-1114.
MLA	Zhao, Ning,et al."Simultaneous tuning of chemical composition and topography of copolymer surfaces: Micelles as building blocks".CHEMPHYSCHEM 8.7(2007):1108-1114.