摘要
The mixed micelle formation of binary cationic 14-s-14 gemini with conventional single chain surfactants was studied by conductivity measurements.The critical micelle concentration(cmc) and the degree of counterion binding values(g) of the binary systems were determined.The results were analyzed by applying regular solution theory(RST) to calculate micellar compositions(X),activity coefficients(f1,f2),and the interaction parameters(β).The synergistic interactions of all the investigated cationic gemini+conventional surfactant combinations were found to be dependent upon the length of hydrophobic spacer of the gemini surfactant.The excess Gibbs free energy of mixing was evaluated,and it indicated relatively more stable mixed micelles for the binary combinations.
The mixed micelle formation of binary cationic 14-s-14 gemini with conventional single chain surfactants was studied by conductivity measurements.The critical micelle concentration（cmc） and the degree of counterion binding values（g） of the binary systems were determined.The results were analyzed by applying regular solution theory（RST） to calculate micellar compositions（X）,activity coefficients（f1,f2）,and the interaction parameters（β）.The synergistic interactions of all the investigated cationic gemini＋conventional surfactant combinations were found to be dependent upon the length of hydrophobic spacer of the gemini surfactant.The excess Gibbs free energy of mixing was evaluated,and it indicated relatively more stable mixed micelles for the binary combinations.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2010年第6期1565-1569,共5页
Acta Physico-Chimica Sinica
基金
supported by the Council of Scientific and Industrial Research(CSIR) Funds,New Delhi,India(ACK.No.:123075/2K8/1)
关键词
物理化学
理论
研究
摘要
Mixed micelle
Gemini surfactant
Conventional surfactant
Critical micelle concentration
Degree of counterion binding
Synergistic interaction
