Studies of surfactant/water systems near the critical micellar concentration using thermal lens spectroscopy

被引：8

作者：

Castillo, J ^{[1
]}

Fernandez, A ^{[1
]}

Mujica, V ^{[1
]}

机构：

[1] Cent Univ Venezuela, Fac Ciencias, Caracas 1041A, Venezuela

来源：

MIKROCHIMICA ACTA | 1998年 / 130卷 / 1-2期

关键词：

thermal lens spectroscopy; micellar solutions; surfactant CMC;

D O I：

10.1007/BF01254598

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel application of photothermal spectroscopy to the study of surfactant-water systems near the critical micellar concentration is reported. The thermal lens signal was induced by a slightly soluble dye and was measured with a dual-beam thermal lens spectrometer. For the two surfactants considered: nonyl phenol and Triton X-100, sharp variations of the thermal lens signal were observed at the critical micellar concentration (CMC), namely an increase for nonyl phenol and a decrease for triton X-100. These effects are arguably related to micelle formation. Our work serves as an initial assessment of the potential of the technique for the study of disperse systems of a higher complexity or dark systems where conventional techniques are impossible to apply.

引用

页码：105 / 110

页数：6