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Citation: DING Wei, WANG Yan, YU Tao, QU Guang-Miao, Wang Rui. Synthesis and Surface Properties of a Series of Sodium Dodecyl Xylenesulfonate Isomers[J]. Chinese Journal of Applied Chemistry, ;2007, 24(9): 1018-1022. shu

Synthesis and Surface Properties of a Series of Sodium Dodecyl Xylenesulfonate Isomers

1.
Chemistry and Chemical Engineering College, Daqing Petroleum Institute, Daqing 163318

Corresponding author: DING Wei,
Received Date: 7 October 2006
Available Online: 6 January 2007
Fund Project: 黑龙江省教育厅科技项目(10541011)资助 (10541011)

Six isomers of sodium dodecyl xylenesulfonate were synthesized from chloride and o-xylene via a five-step process involving Friedel-Crafts reaction, Grignard reaction, reduction, sulfonation. and neutralization. The structures of the intermediates and the final products were characterized by IR, ESI-MS and ¹H NMR. The surface tensions of dilute aqueous solutions of product were measured at 25℃ by drop-volume method and then the critical micelle concentration(CMC) was determined. The values of CMC(mmol/L) and γ_CMC(mN/m) are Ⅰ.0.25, 30.00; Ⅱ.0.50, 28.21; Ⅲ.0.79, 28.10; Ⅳ.1.00, 27.01; Ⅴ.2.00, 26.41; Ⅵ.2.50, 26.40. These results indicate that the CMC increases but the γ_CMC decreases as the position of benzene ring is moved from the edge to the middle of the long chain alkyl.
- Friedel-Crafts reaction,
- Grignard reaction,
- surfactant,
- surface tention,
- CMC
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