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 |
2004-05-15 | |
卷号 | 273期号:2页码:626-631 |
关键词 | self-diffusion coefficient critical micelle concentrations composition of mixed micelles cetyltrimethylammonium bromide (CTAB) polyethylene glycol (23) lauryl ether (Brij-35) interaction parameter surface tension |
英文摘要 | 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. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Chemistry, Physical |
研究领域[WOS] | Chemistry |
关键词[WOS] | SURFACE-ACTIVE AGENTS ; NONIONIC SURFACTANTS ; IONIC SURFACTANTS ; FIELD GRADIENT ; MICELLES ; MIXTURES ; MICELLIZATION ; BINARY |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000220999000037 |
公开日期 | 2015-12-08 |
内容类型 | 期刊论文 |
源URL | [http://ir.wipm.ac.cn/handle/112942/8998] |
专题 | 武汉物理与数学研究所_2011年以前论文发表(包括2011年) |
作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 2.Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100101, Peoples R China |
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):626-631. |
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),626-631. |
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):626-631. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论