Effect of a weak electrolyte on the critical micellar concentration of sodium dodecyl sulfate

被引：45

作者：

Esposito, C ^{[1
]}

Colicchio, P ^{[1
]}

Facchiano, A ^{[1
]}

Ragone, R ^{[1
]}

机构：

[1] Univ Naples 2, Dipartimento Biochim & Biofis, I-80138 Naples, Italy

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1998年 / 200卷 / 02期

关键词：

micellization; effect of pH on; sodium dodecyl sulfate; charged surfactants; acid-base balance; micelle counterions; 1,8-ANS fluorescence;

D O I：

10.1006/jcis.1997.5363

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 critical micellar concentration of sodium dodecyl sulfate is strongly altered by tris(hydroxy-methyl)methylammonium ions. The effect of buffer solutions containing this weak electrolyte as the counterion source has been studied using various concentrations of the acid-base system as well as modifying the pH. Results show that counterion concentrations ranging from 0 to similar to 340 x 10(-3) M induce an appreciable diminution of the critical micellar concentration from similar to 8 to similar to 0.7 x 10(-3) M. The analysis of data suggests that the critical micellar concentration of sodium dodecyl sulfate depends on the concentration of weak electrolytes in a way very similar to that of strong electrolytes. (C) 1998 Academic Press.

引用

页码：310 / 312

页数：3

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