The synthesis and surface activity of perfluoro-2,5-dimethyl-3,6-dioxanonanoic acid ester fluorocarbon surfactants

被引：12

作者：

Han, Lulu ^{[1
]}

Zhang, Yongming ^{[1
]}

Li, Hong ^{[1
]}

Li, Lei ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Technol, Shanghai 200240, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2009年 / 334卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Fluorocarbon surfactants; Critical micelle concentration; Surface tension; Effective cross-section area; SUPERCRITICAL CARBON-DIOXIDE; SALT GEMINI SURFACTANTS; POLYMERIZATION; AMMONIUM; MICELLIZATION; ADSORPTION; EMULSION; TENSION;

D O I：

10.1016/j.colsurfa.2008.10.020

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 series of perfluoro-2,5-dimethyl-3,6-dioxanoanoic acid ester fluorocarbon surfactants, CF3CF2CF2OCF(CF3)CF2OCF(CF3)COOCnH2n+1 (C9F17O4-CnH2n+1: n = 8, 12, 16. 18), were synthesized by esterification of 2,3,3.3-tetrafluoro-2-(1,1,2,3,3,3-hexafluoro-2-(heptafluoropropyloxy)-propoxy)-propionic acid fluoride with 1-octanol, 1-dodecanol, 1-hexadecanol and 1-octadecanol, respectively. The structures of C9F17O4-CnH2n+1 (n = 8, 12, 16, 18) were extensively characterized by FT-IR, H-1 NMR and 1)F NMR. The results of study on the surface activities show they have low surface tension and can significantly reduce the surface tensions of organic solvents by 40-83%. Besides, the critical micelle concentrations of these surfactants in solvents with different polarities have been identified at 18 degrees C. Furthermore, the surface excess concentrations and the effective cross-section areas of C9F17O4-CnH2n+1 in cyclohexane have been analyzed in detail. The arrangements of these surfactants at the air/solvent interface were speculated thereby. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：176 / 180

页数：5

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