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	A Fourier transform infrared study on water-induced reverse micelle formation of block copoly(oxyethylene-oxypropylene-oxyethylene) in organic solvent
	Guo, C; Liu, HZ; Chen, JY
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2000-12-15
卷号	175期号:1-2页码:193-202
关键词	pluronic L92 reverse micelle Fourier transform infrared
ISSN号	0927-7757
其他题名	Colloid Surf. A-Physicochem. Eng. Asp.
中文摘要	The water-induced micellization of poly(oxyethylene-oxypropylene-oxyethyle) block copolymer, Pluronic L92, in p-xylene solution has been investigated by FT-IR spectroscopic technique. The OH stretching band of water has been resolved by deconvolution and Gaussian curve fitting. The solubilized water can be classified into monomer bound water, dimer bound water, free water and trapped water. Each states of water were sensitive to the water to EO molar ratio (Z). Therefore, their variations with the water to EO molar ratio (Z) have been employed for the detection of the reverse micelle formation and structural change. It showed that Pluronic L92 did not form polymolecular micelles when molar ratio water/EO (Z) 0.35. For Z < 1.3, spherical micelles were formed and for Z > 1.3, the micelle shape could be nonspherical. The water-EO interaction dominated at all water content. As water was added in the Pluronic L92-p-xylene system, the water-water interaction strengthened during micellization and structural change of micelle. In the meantime, the block copolymer molecules showed stronger intermolecular interaction as compared with that before transition. The micellization of Pluronic L92 in p-xylene was explained by the strengthening of the intermolecular interaction of copolymer, which introduced by the water-water interaction. The results confirm the leading role of water in the reverse micelle formation of PEO-PPO-PEO block copolymer. (C) 2000 Elsevier Science B.V. All rights reserved.
英文摘要	The water-induced micellization of poly(oxyethylene-oxypropylene-oxyethyle) block copolymer, Pluronic L92, in p-xylene solution has been investigated by FT-IR spectroscopic technique. The OH stretching band of water has been resolved by deconvolution and Gaussian curve fitting. The solubilized water can be classified into monomer bound water, dimer bound water, free water and trapped water. Each states of water were sensitive to the water to EO molar ratio (Z). Therefore, their variations with the water to EO molar ratio (Z) have been employed for the detection of the reverse micelle formation and structural change. It showed that Pluronic L92 did not form polymolecular micelles when molar ratio water/EO (Z) 0.35. For Z < 1.3, spherical micelles were formed and for Z > 1.3, the micelle shape could be nonspherical. The water-EO interaction dominated at all water content. As water was added in the Pluronic L92-p-xylene system, the water-water interaction strengthened during micellization and structural change of micelle. In the meantime, the block copolymer molecules showed stronger intermolecular interaction as compared with that before transition. The micellization of Pluronic L92 in p-xylene was explained by the strengthening of the intermolecular interaction of copolymer, which introduced by the water-water interaction. The results confirm the leading role of water in the reverse micelle formation of PEO-PPO-PEO block copolymer. (C) 2000 Elsevier Science B.V. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
关键词[WOS]	OXIDE) POLY(PROPYLENE OXIDE) ; NON-IONIC SURFACTANTS ; FT-IR SPECTROSCOPY ; AQUEOUS-SOLUTION ; PHASE-BEHAVIOR ; LIGHT-SCATTERING ; O-XYLENE ; OXYPROPYLENE OXYETHYLENE) ; TRIBLOCK COPOLYMERS ; PROPYLENE-OXIDE
收录类别	ISTP ; SCI
原文出处	://WOS:000089562300026
语种	英语
WOS记录号	WOS:000089562300026
公开日期	2013-11-15
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/5948]
专题	过程工程研究所_研究所（批量导入）
作者单位	Chinese Acad Sci, Inst Chem Met, Young Scientist Lab Separat Sci & Engn, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Guo, C,Liu, HZ,Chen, JY. A Fourier transform infrared study on water-induced reverse micelle formation of block copoly(oxyethylene-oxypropylene-oxyethylene) in organic solvent[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2000,175(1-2):193-202.
APA	Guo, C,Liu, HZ,&Chen, JY.(2000).A Fourier transform infrared study on water-induced reverse micelle formation of block copoly(oxyethylene-oxypropylene-oxyethylene) in organic solvent.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,175(1-2),193-202.
MLA	Guo, C,et al."A Fourier transform infrared study on water-induced reverse micelle formation of block copoly(oxyethylene-oxypropylene-oxyethylene) in organic solvent".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 175.1-2(2000):193-202.

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