Properties of polyethylene glycol(23) lauryl ether with cetyltrimethylammonium bromide in mixed aqueous solutions studied by self-diffusion coefficient NMR

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	Properties of polyethylene glycol(23) lauryl ether with cetyltrimethylammonium bromide in mixed aqueous solutions studied by self-diffusion coefficient NMR
	Gao, HC ; Zhu, RX ; Yang, XY ; Mao, SZ ; Zhao, S ; Yu, JY ; Du, YR
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2004
卷号	273 期号:2 页码:626
关键词	SURFACE-ACTIVE AGENTS NONIONIC SURFACTANTS IONIC SURFACTANTS FIELD GRADIENT MICELLES MIXTURES MICELLIZATION BINARY
ISSN号	0021-9797
通讯作者	Du, YR (reprint author), Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China.
中文摘要	NMR self-diffusion coefficient measurements have been used to study the properties of polyethylene glycol (23) lauryl ether (Brij-35) with cetyltrimethylammonium bromide (CTAB) in the mixed aqueous solutions with different mole fractions of CTAB. By fitting the self-diffusion coefficients to the two-state exchange model, the critical micelle concentrations of the two solutes in the mixed solutions (cmc(1)* and cmc(2)) were obtained. The critical mixed micelle concentrations (cmc) were then evaluated by the sum of cmc(1)* and cmc(2), which are in good agreement with the results measured by the Surface tension method. The cmc values are lower than those of the ideal case of mixing. which indicates that the behavior of the CTAB/Brij-35 system is nonideal. Moderate interactions between CTAB and Brij-35 in their mixtures can be deduced from the interaction parameters (beta(M)) based on the cmc* obtained by the NMR self-diffusion method. The compositions (x(1)) of the mixed micelles at different total surfactant concentrations were also evaluated. By using these results, a possible mechanism of mixed micellar formation and a picture of the formation of nonsimultaneous CTAB/Brij-35 binary mixed micelle were proposed. In contrast to the case of CTAB/TX-100 system, Brij-35 molecules have a tendency to form micelles first at any mole fraction of CTAB. The mixed micellar self-diffusion coefficients (D-m) increase slightly at lower CTAB molar ratios, and then speed up with increasing CTAB mole fraction. (C) 2004 Elsevier Inc. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/51542]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Gao, HC,Zhu, RX,Yang, XY,et al. Properties of polyethylene glycol(23) lauryl ether with cetyltrimethylammonium bromide in mixed aqueous solutions studied by self-diffusion coefficient NMR[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2004,273(2):626.
APA	Gao, HC.,Zhu, RX.,Yang, XY.,Mao, SZ.,Zhao, S.,...&Du, YR.(2004).Properties of polyethylene glycol(23) lauryl ether with cetyltrimethylammonium bromide in mixed aqueous solutions studied by self-diffusion coefficient NMR.JOURNAL OF COLLOID AND INTERFACE SCIENCE,273(2),626.
MLA	Gao, HC,et al."Properties of polyethylene glycol(23) lauryl ether with cetyltrimethylammonium bromide in mixed aqueous solutions studied by self-diffusion coefficient NMR".JOURNAL OF COLLOID AND INTERFACE SCIENCE 273.2(2004):626.