Gel phase originating from molecular quasi-crystallization and nanoﬁber growth of sodium laurate–water system

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	Gel phase originating from molecular quasi-crystallization and nanoﬁber growth of sodium laurate–water system
	Liu WM(刘维民)
刊名	Soft Matter
	2008
卷号	4 页码:1639-1644
ISSN号	1744-683X
通讯作者	郝京诚
中文摘要	Adding sodium salts to a dilute sodium laurate (SL) aqueous solution, slow phase transition was observed fromthemicelle solution to a gel phase. The phase-transition process has great resemblance to crystal salt-out. The observation by transmission electron microscopy (TEM) proved that the hydrogel is a network structure with interweaving ﬁbers and ribbons, which can trap an aqueous solution. The images of high-resolution TEM(HR-TEM) indicated that each of the ﬁbers and ribbons is composed of a bundle of parallel cylindrical nanoﬁbers. Conductivity and in situ diffuse reﬂectance fourier-transform infrared (DR-FT-IR) spectroscopy measurements indicated that gel formation was induced due to a crystallization of rod micelles by Na+ ions bonding to the oxygen groups of salts of fatty carboxylates. Differential scanning calorimetry (DSC) showed that the increase of either the chain length of sodium soaps or the concentration of Na+ counter-ions promoted the growth of the nanoﬁbers. We speculated that the phase transition from the micelle solution to the gel phase is a result of a crystallization of rod micelles induced by sodium ions.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the NSFC (GrantNo. 20625307;20533050)
语种	英语
公开日期	2013-03-28
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/2693]
专题	兰州化学物理研究所_固体润滑国家重点实验室
推荐引用方式 GB/T 7714	Liu WM. Gel phase originating from molecular quasi-crystallization and nanoﬁber growth of sodium laurate–water system[J]. Soft Matter,2008,4:1639-1644.
APA	刘维民.(2008).Gel phase originating from molecular quasi-crystallization and nanoﬁber growth of sodium laurate–water system.Soft Matter,4,1639-1644.
MLA	刘维民."Gel phase originating from molecular quasi-crystallization and nanoﬁber growth of sodium laurate–water system".Soft Matter 4(2008):1639-1644.