THE AGGREGATION IN DODECYLTRIMETHYLAMMONIUM HYDROXIDE AQUEOUS-SOLUTIONS

被引：25

作者：

SCHULZ, PC ^{[1
]}

MORINI, MA ^{[1
]}

MINARDI, RM ^{[1
]}

PUIG, JE ^{[1
]}

机构：

[1] UNIV GUADALAJARA,FAC CHEM SCI,GUADALAJARA,MEXICO

来源：

COLLOID AND POLYMER SCIENCE | 1995年 / 273卷 / 10期

关键词：

HYDROXIDE SURFACTANTS; CRITICAL MICELLE CONCENTRATION; AGGREGATION; CATIONIC SURFACTANTS; MICELLE CHARGE;

D O I：

10.1007/BF00660374

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：

The aggregation of dodecyl trimethylammonium hydroxide (DTAOH) aqueous solutions has been studied by several methods. It is stepwise and four critical points were found. At C-T = (2.51 +/- 0.10) x 10(-4) mol . dm(-3) the surface excess becomes zero, at C-T = (1.300 +/- 0.041) x 10(-3) mol . dm(-3) small aggregates form, which grow with concentration. At C-T = (1.108 +/- 0.010) x 10(-2) mol . dm(-3) true micelles form (CMC) and at (3.02 +/- 0.28) x 10(-2) mol . dm(-3) the structure of micelles probably changes affecting their properties. The DTAOH micelles are highly ionized (alpha = 0.8) at the CMC, and decreases to reach very small values when the total concentration increases.

引用

页码：959 / 966

页数：8

共 49 条

[1] SELECTIVITY COEFFICIENTS FOR ION-EXCHANGE IN MICELLES OF HEXADECYLTRIMETHYLAMMONIUM BROMIDE AND CHLORIDE [J].