Miscibility of anhydrous cationic surfactant mixtures

被引：2

作者：

Bardavid, S. M. ^{[1
]}

Schulz, P. C. ^{[2
]}

Arancibia, E. L. ^{[1
]}

机构：

[1] Univ Nacl Tucuman, Fac Ciencias Exactas & Tecnol, Dept Ingn Proc & Gest Ind, INQUINOA CONICET, RA-4000 San Miguel De Tucuman, Tucuman, Argentina

[2] Univ Nacl Sur, Dept Quim, INQUISUR CONICET, RA-8000 Bahia Blanca, Buenos Aires, Argentina

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2010年 / 156卷 / 2-3期

关键词：

Cationic surfactant mixtures; IGC; DSC; Interaction parameters; Solubility parameters; INVERSE GAS-CHROMATOGRAPHY; POLYMER INTERACTION PARAMETERS; LIQUID-CRYSTAL MIXTURES; ALKYLTRIMETHYLAMMONIUM BROMIDES; BINARY-MIXTURES; NEUTRON REFLECTION; MICELLE FORMATION; SODIUM PALMITATE; SELF-AGGREGATION; BULK PROPERTIES;

D O I：

10.1016/j.molliq.2010.07.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Inverse gas chromatography (IGC) has been used for studying the miscibility of anhydrous cationic surfactant mixtures. Dodecyltrimethylammonium bromide (C(12)TAB), octadecyltrimethylammonium bromide (C(18)TAB) and their mixtures have been used as stationary phases. In these types of stationary phases, the working temperature was determined by Differential Scanning Calorimetric (DSC) and Inverse Gas Chromatography (IGC) techniques. Values of the interaction parameters between the cationic surfactants obtained at four different compositions of their mixtures and at five temperatures showed that the miscibility depended on the composition and suggested that the interactions became more unfavorable with the increment of C(18)TAB concentration in the mixtures. The results have been interpreted by comparing the structure of the anhydrous lamellar liquid crystals with that of the lamellar mesophases formed in aqueous solutions. Deviations of the systems from the parameter solubility model have been discussed in terms of the entropy contribution to the Flory-Huggins interaction parameter. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：165 / 170

页数：6

共 63 条

[1]

Unusual behavior of CMC for binary mixtures of alkyltrimethylammonium bromides: Dependence on chain length difference [J].