Aggregation Behavior of a Tetrameric Cationic Surfactant in Aqueous Solution

doi:10.1021/la903672r

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	Aggregation Behavior of a Tetrameric Cationic Surfactant in Aqueous Solution
	Hou, Yanbo 1; Han, Yuchun 1; Deng, Manli 1; Xiang, Junfen 2; Wang, Yilin 1
刊名	LANGMUIR
	2010-01-05
卷号	26 期号:1 页码:28-33
ISSN号	0743-7463
DOI	10.1021/la903672r
英文摘要	A star-shaped tetrameric quaternary ammonium surfactant PATC, which has four hydrophobic chains and charged hydrophilic headgroups connected by amide-type spacer group, has been synthesized in this work. Surface tension, electrical conductivity, ITC, DLS, and NMR have been used to investigate the relationship between its chemical structure and its aggregation properties. Interestingly, a large size distribution around 75 run is observed below the critical micelle concentration (cmc) of PATC, and the large size distribution starts to decrease beyond the cmc and finally transfers to a small size distribution. It is proved that the large size premicellar aggregates may display network like structure, and the size decrease beyond the cmc is the transition of the network-like aggregates to micelles. The possible reason is that intramolecular electrostatic repulsion among the charged headgroups below the cmc leads to a star-shaped molecular configuration, which may form the network-like aggregates through intermolecular hydrophobic interaction between hydrocarbon chains, while the hydrophobic effect becomes strong enough to turn the molecular configuration into pyramid-like shape beyond the cmc, which make the transition of network-like aggregates to micelles available.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000272937500005
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/70489]
专题	中国科学院化学研究所
通讯作者	Wang, Yilin
作者单位	1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Colloid & Interface Sci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Ctr Physiochem Anal & Measurement, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Hou, Yanbo,Han, Yuchun,Deng, Manli,et al. Aggregation Behavior of a Tetrameric Cationic Surfactant in Aqueous Solution[J]. LANGMUIR,2010,26(1):28-33.
APA	Hou, Yanbo,Han, Yuchun,Deng, Manli,Xiang, Junfen,&Wang, Yilin.(2010).Aggregation Behavior of a Tetrameric Cationic Surfactant in Aqueous Solution.LANGMUIR,26(1),28-33.
MLA	Hou, Yanbo,et al."Aggregation Behavior of a Tetrameric Cationic Surfactant in Aqueous Solution".LANGMUIR 26.1(2010):28-33.