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Synthesis and Thermodynamic Properties of Rosin‐Based Cationic Gemini Surfactants
Author(s) -
Deng Weixing,
Zhang Yongchang,
Zhong Yuanwei,
Peng Jinwen
Publication year - 2014
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-013-1559-9
Subject(s) - chemistry , aqueous solution , enthalpy , rosin , counterion , cationic polymerization , thermodynamics , thermodynamics of micellization , critical micelle concentration , micelle , surface tension , gibbs free energy , polymer chemistry , organic chemistry , ion , physics , resin acid
A series of rosin‐based cationic gemini surfactants with different spacer length ( n = 2, 3, 4) were synthesized and characterized. Surface activity and micellization parameters including the critical micelle concentration, the degree of counterion dissociation, and thermodynamic functions of micellization in aqueous solutions have been investigated. Free energy perturbation was performed to study the enthalpy‐entropy compensation of the synthesized gemini surfactants in aqueous solutions. The experimental results showed that the micellization of rosin‐based gemini surfactants in aqueous solutions is a spontaneous and entropy‐driven process. The micellization process was found to follow the entropy–enthalpy compensation phenomenon.