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Citation: XU Hu-Jun, WANG Zhong-Cai, LIU Xiao-Ya, . The Interaction of Esterquat Gemini Surfactant with SDS[J]. Acta Physico-Chimica Sinica, ;2006, 22(04): 414-418. doi: 10.3866/PKU.WHXB20060405 shu

The Interaction of Esterquat Gemini Surfactant with SDS

1.
School of Chemical Engineering, Southern Yangtze University, Wuxi 214036, P. R. China; School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China

Corresponding author: ,
Received Date: 5 September 2005
Available Online: 10 April 2006

The interactions of a series of novel cleavable esterquat Gemini surfactants, Cm-1H2m-1COOCH2CH2(CH3)2N+(CH2)n+N(CH3)2CH2CH2OOCCm-1H2m-1]•2Br-(symbolized II-m-n, m=10, 12; n=3, 4, 6), with sodium dodecyl sulphate (SDS) in aqueous solution have been investigated. The experimental results suggested that both II-10-n and II-12-n had evident synergism with SDS in mixed micelle formation and surface tension reduction in binary system. II-10-n manifested stronger synergistic interaction with SDS than II-12-n, which was attributed to the equal-chain length effect. The synergism in mixed micelle formation of II-m-n/SDS was found to become more intense increasingly with the increase of n. The equilibrium constant proof illustrated that the ratio of II-m-n to SDS existed in mixed micelles was approximately 1:1, which indicated that the mixed micelle was charged. Therefore the addition of NaBr could improve the surface activity of II-m-n/SDS mixtures and promote the formation of mixed micelles.
- Esterquat Gemini surfactant;Sodium dodecyl sulphate;Mixed system;Mixed micelle
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