ICCAS OpenIR
Effect of the nature of the spacer on the aggregation properties of gemini surfactants in an aqueous solution
Wang, XY; Wang, JB; Wang, YL; Yan, HK; Li, PX; Thomas, RK
2004-01-06
Source PublicationLANGMUIR
ISSN0743-7463
Volume20Issue:1Pages:53-56
AbstractThe aggregation properties of three dicationic quaternary ammonium gemini surfactants with the same structure, except the spacer group, diethyl ether, six methylene, and p-xylyl, have been studied using electrical conductivity and fluorescence. The critical micelle concentration (cmc) and the micelle aggregation number (N) were determined, and the micropolarity and the microviscosity of the micelle were characterized. The micelle ionization degree (alpha) was obtained by a combination of the electrical conductivity data and the micelle aggregation number. Furthermore, the Gibbs free energy of micellization (DeltaG(mic)) was studied. These results have shown that the nature of the spacer has an important effect on the aggregation properties of gemini surfactants in an aqueous solution. A hydrophilic, flexible spacer prompts micelle formation, which leads to a smaller cmc, smaller alpha, larger N, and more negative DeltaG(mic). Meanwhile, the microviscosity study indicates that the gemini surfactant with a hydrophilic, flexible spacer forms a more closely packed micelle structure than the one with a hydrophobic, rigid spacer.
DOI10.1021/la0351008
Indexed BySCI
Language英语
WOS IDWOS:000187754400013
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:154[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82090
Collection中国科学院化学研究所
Corresponding AuthorWang, YL
Affiliation1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Key Lab Colloid & Interface Sci, Beijing 100080, Peoples R China
2.Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England
Recommended Citation
GB/T 7714
Wang, XY,Wang, JB,Wang, YL,et al. Effect of the nature of the spacer on the aggregation properties of gemini surfactants in an aqueous solution[J]. LANGMUIR,2004,20(1):53-56.
APA Wang, XY,Wang, JB,Wang, YL,Yan, HK,Li, PX,&Thomas, RK.(2004).Effect of the nature of the spacer on the aggregation properties of gemini surfactants in an aqueous solution.LANGMUIR,20(1),53-56.
MLA Wang, XY,et al."Effect of the nature of the spacer on the aggregation properties of gemini surfactants in an aqueous solution".LANGMUIR 20.1(2004):53-56.
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