IN-SITU SUM-FREQUENCY SPECTROSCOPY OF SODIUM DODECYL-SULFATE AND DODECANOL COADSORBED AT A HYDROPHOBIC SURFACE

被引：75

作者：

BAIN, CD

DAVIES, PB

WARD, RN

机构：

[1] UNIV CAMBRIDGE,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND

[2] UNILEVER RES,PORT SUNLIGHT LAB,WIRRAL L63 3JW,ENGLAND

来源：

LANGMUIR | 1994年 / 10卷 / 07期

关键词：

D O I：

10.1021/la00019a006

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The adsorption of sodium dodecyl sulfate (SDS) and dodecanol from solutions of the pure and mixed surfactants onto hydrophobic substrates was studied by infrared-visible sum-frequency spectroscopy. Pure films of dodecanol were found to be more densely packed and to contain fewer gauche defects than those of SDS. A marked increase in the conformational order of the SDS occurred upon the coadsorption of dodecanol. This effect was only observed below the critical micelle concentration (cmc)-above the cmc, the dodecanol only absorbed weakly and resided mainly in the SDS micelles.

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页码：2060 / 2063

页数：4

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