Micellization of Pluronic L64 in salt solution by FTIR spectroscopy

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	Micellization of Pluronic L64 in salt solution by FTIR spectroscopy
	Zheng, LL ; Guo, C ; Wang, J ; Liang, XF ; Bahadur, P ; Chen, S ; Ma, JH ; Liu, HZ
刊名	VIBRATIONAL SPECTROSCOPY
	2005-10-31
卷号	39 期号:2 页码:157-162
关键词	FTIR deconvolution method pluromc L64 salt solution
ISSN号	0924-2031
其他题名	Vib. Spectrosc.
中文摘要	The micellization of a poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer (Pluronic L64: EO13PO30EO13) with the presence of various sodium halides (NaF, NaCl, NaBr and NaI) was studied by Fourier transform infrared (FTIR) spectroscopy. The critical micelle temperature (CMT) of Pluronic L64 in the salt solution decreased with the addition of salt and the anion effect followed the sequence: F- > Cl- > Br- > I-. The deconvolution method was used to resolve the overlapping bands in the C-O stretching region. The deconvoluted spectra provide information about the microenvironmental changes of ethylene oxide (EO) and propylene oxide (PO) blocks in the salt solution. Both the PEO and PPO blocks are dehydrated at lower temperature in the salt solution. The standard enthalpies (Delta H-0) and entropies (Delta S-0) of micellization for copolymer, PEO and PPO blocks, decreased by the addition of salt. Thus, it is deduced that the salt-induced decrease of enthalpy of micellization contributes to the decrease of CMT. The results reveal the leading role of salt-water interaction in promoting the micellization of PEO-PPO-PEO copolymer on addition of salt. (c) 2005 Elsevier B.V. All rights reserved.
英文摘要	The micellization of a poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer (Pluronic L64: EO13PO30EO13) with the presence of various sodium halides (NaF, NaCl, NaBr and NaI) was studied by Fourier transform infrared (FTIR) spectroscopy. The critical micelle temperature (CMT) of Pluronic L64 in the salt solution decreased with the addition of salt and the anion effect followed the sequence: F- > Cl- > Br- > I-. The deconvolution method was used to resolve the overlapping bands in the C-O stretching region. The deconvoluted spectra provide information about the microenvironmental changes of ethylene oxide (EO) and propylene oxide (PO) blocks in the salt solution. Both the PEO and PPO blocks are dehydrated at lower temperature in the salt solution. The standard enthalpies (Delta H-0) and entropies (Delta S-0) of micellization for copolymer, PEO and PPO blocks, decreased by the addition of salt. Thus, it is deduced that the salt-induced decrease of enthalpy of micellization contributes to the decrease of CMT. The results reveal the leading role of salt-water interaction in promoting the micellization of PEO-PPO-PEO copolymer on addition of salt. (c) 2005 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Analytical ; Chemistry, Physical ; Spectroscopy
研究领域[WOS]	Chemistry ; Spectroscopy
关键词[WOS]	OXIDE) BLOCK-COPOLYMER ; DIFFERENTIAL SCANNING CALORIMETRY ; AQUEOUS-SOLUTION ; POLY(PROPYLENE OXIDE) ; ASSOCIATION BEHAVIOR ; TRIBLOCK COPOLYMERS ; POTASSIUM FLUORIDE ; MICELLAR BEHAVIOR ; SODIUM-CHLORIDE ; PHASE-BEHAVIOR
收录类别	SCI
原文出处	://WOS:000232499700006
语种	英语
WOS记录号	WOS:000232499700006
公开日期	2013-10-25
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/4193]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Lab Separat Sci & Engn, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.S Gujarat Univ, Dept Chem, Surat 395007, India
推荐引用方式 GB/T 7714	Zheng, LL,Guo, C,Wang, J,et al. Micellization of Pluronic L64 in salt solution by FTIR spectroscopy[J]. VIBRATIONAL SPECTROSCOPY,2005,39(2):157-162.
APA	Zheng, LL.,Guo, C.,Wang, J.,Liang, XF.,Bahadur, P.,...&Liu, HZ.(2005).Micellization of Pluronic L64 in salt solution by FTIR spectroscopy.VIBRATIONAL SPECTROSCOPY,39(2),157-162.
MLA	Zheng, LL,et al."Micellization of Pluronic L64 in salt solution by FTIR spectroscopy".VIBRATIONAL SPECTROSCOPY 39.2(2005):157-162.