Effect of hydrophobic chain length of surfactants on enthalpy-entropy compensation of micellization

被引:338
作者
Chen, LJ [1 ]
Lin, SY
Huang, CC
机构
[1] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan
[2] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 1998年 / 102卷 / 22期
关键词
D O I
10.1021/jp9804345
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
It is well-known that there exists a minimum critical micelle concentration (cmc) in the cmc-temperature curve. It is found that the temperature of minimum cmc, T-min, for both nonionic and ionic surfactants increases as the hydrophobicity of surfactants decreases. The temperature dependence of cme is used to calculate the enthalpies and entropies of micelle formation for six different homologous series of surfactants, The enthalpy-entropy compensation plot exhibits an excellent linearity. It is found that all the compensation lines for surfactants in a homologous series an parallel to one another and the intercept of these compensation lines is a linear function of the hydrophobic chain length of surfactants.
引用
收藏
页码:4350 / 4356
页数:7
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