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Citation: YU Tao, LIU Hong-Juan, DING Wei, QU Guang-Miao, GUO Sheng-Juan. Surface Properties of Aqueous Solutions of High-purity Poly-alkylbenzene Sulfonates[J]. Chinese Journal of Applied Chemistry, ;2008, 25(9): 1107-1109. shu

Surface Properties of Aqueous Solutions of High-purity Poly-alkylbenzene Sulfonates

1.
Chemistry and Chemical Engineering College, Daqing Petroleum Institute, Daqing163318

Corresponding author: YU Tao,
Received Date: 21 August 2007
Available Online: 14 November 2007
Fund Project: 黑龙江省教育厅科技项目(10541011)资助 (10541011)

The critical micelle concentrations(cmc,1×10^-4 mol/L) and the surface tension(γ_cmc,mN/m) of poly-alkylbenzene sulfonates synthesized in the laboratory were measured at 25 ℃.The cmc and γ_cmc values were(C12-5S) 3.889,32.69;(C14-3S) 1.000,31.40;(C14-5S) 1.173,30.21;(C14-7S) 3.720,28.55;(C16-5S) 1.016,29.96,respectively.The adsorption capacity Γ_max,the saturated adsor-ption area A_m,and the surfactant concentration needed in order to reduce surface tension by 20 mN/m(pc₂₀) were calculated according to Gibbs adsorption equation.Their characteristics were explained based on molecular structure.
- poly-alkylbenzene sulfonates,
- critical micelle concentration,
- adsorption capacity,
- surface tension
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