The results obtained from the measurements of cotmterion association degree using ion selective electrode with improved experiment techinique and equation for CTMAB micelle system are in accordance with that calculate...The results obtained from the measurements of cotmterion association degree using ion selective electrode with improved experiment techinique and equation for CTMAB micelle system are in accordance with that calculated by electrochemical theory of micelle. The study also show that the externally added KBr concentration have no effects on the counterion association degree of thecelle and KBr are unnecessary for the determination of counterion association degree in the CTMAB concentration rannge of Ct<4CMC. Addition of hexanol decreases counterion association degree in CTMAB micelle systems.展开更多
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 bi...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.展开更多
文摘The results obtained from the measurements of cotmterion association degree using ion selective electrode with improved experiment techinique and equation for CTMAB micelle system are in accordance with that calculated by electrochemical theory of micelle. The study also show that the externally added KBr concentration have no effects on the counterion association degree of thecelle and KBr are unnecessary for the determination of counterion association degree in the CTMAB concentration rannge of Ct<4CMC. Addition of hexanol decreases counterion association degree in CTMAB micelle systems.
基金supported by the Council of Scientific and Industrial Research(CSIR) Funds,New Delhi,India(ACK.No.:123075/2K8/1)
文摘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.
