Formation of Vesicles and Micelles in Aqueous Systems of Tetrameric Acids as Determined by Dynamic Light Scattering

被引：8

作者：

Ge, Lingling ^{[1
]}

Simon, Sebastien ^{[2
]}

Grimes, Brian ^{[2
]}

Nordgard, Erland ^{[2
]}

Xu, Zhenghe ^{[1
]}

Sjoblom, Johan ^{[2
]}

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2V4, Canada

[2] Norwegian Univ Sci & Technol NTNU, Ugelstad Lab, Dept Chem Engn, Trondheim, Norway

来源：

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2011年 / 32卷 / 11期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Light scattering; micelles; tetraacids; vesicles; C-80 ISOPRENOID TETRAACIDS; SODIUM DODECYL-SULFATE; MODEL COMPOUNDS; NAPHTHENIC ACIDS; WATER; SURFACTANT; SOLUBILIZATION; TRANSITION; CURVATURE; LAMELLAR;

D O I：

10.1080/01932691.2010.527814

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A comprehensive dynamic light scattering (DLS) study on the system BP10Na(4)/water is presented. BP 10Na(4) is a tetrameric fatty acid in sodium form. In order to change molecular packing conditions both electrolyte (NaCl) and alcohol (1-butanol, 1-pentanol) are added to the surfactant system. Phase diagrams of the systems reveal not only an extensive micellization, but also the occurrence of a lamellar liquid crystalline D phase. The DLS study shows an existence of vesicles at very dilute BP10Na(4) concentrations (<< cmc) and also a co-existence of micelles and vesicles at higher BP10Na(4) concentrations. Cryo-TEM pictures verify the existence of the vesicles. Based on the DLS and SLS experiments the weight-average molar mass of the micelles are estimated to be 13500g/mol at 100mM NaCl and 22700g/mol at 600mM. The corresponding aggregation numbers are 13 and 22, respectively.

引用

页码：1582 / 1591

页数：10

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