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Citation: LIU Jin-Yan, ZHAO Jian-Xi, HE Yun-Jing. Conductivity Study on Interactions of C₁₂-s-C₁₂·2Br with C_mTXABr in Aqueous Solution[J]. Chinese Journal of Applied Chemistry, ;2005, 22(6): 600-604. shu

Conductivity Study on Interactions of C₁₂-s-C₁₂·2Br with C_mTXABr in Aqueous Solution

1.
Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002

Corresponding author: ZHAO Jian-Xi,
Received Date: 27 August 2004
Available Online: 28 November 2004
Fund Project: 国家自然科学基金(20173010) (20173010)福建省自然科学基金(E0110012)资助项目 (E0110012)

Quaternary ammonium Gemini surfactants (C₁₂-s-C₁₂·2Br)(s=2,3,4,6) and alkyl ammonium bromide (C_mTXABr),both carrying positive charge on the head group,form mixed micelle in aqueous solution.The micellazation is close to ideal mixing and does not show synergism.In the mixed system of C₁₂-s-C₁₂·2Br/C₁₂TMABr,the critical mixed micell concentration (cmc_T) gradually increases with the increase of the number of methylene (s) in the spacer from 2 to 4 and reaches a maximum at s=4,then the cmc_T slightly decreases with s further increasing to 6,which is similar to the dependence of cmc on s in single component C₁₂-s-C₁₂·2Br aqueous solution.The mixed micellization is promoted with increasing the alkyl chain length of C_mTMABr from 12 to 16 or the head-group size of C₁₂TXABr from three methyl to three propyl.In the mixed systems with equal mole ratio of C₁₂-2-C₁₂·2Br/C_mTXABr,the cmc_T's were 1.30(s=2/C₁₂TMABr),1.25(s=2/C₁₄TMABr),0.96(s=2/C₁₆TMABr),1.27(s=2/C₁₂TEABr) and 1.21(s=2/C₁₂TBABr) mmol/L,respectively.
- C₁₂-s-C₁₂·2Br,
- C_mTXABr,
- mixed micellazation,
- spacer effect
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Conductivity Study on Interactions of C₁₂-s-C₁₂·2Br with C_mTXABr in Aqueous Solution