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Citation: DING Wei, SU Ya-Bin, ZHANG Chun-Hui, GAO Xiao-Yu, LI An-Jun, YANG Yang, YU Tao, CHENG Jie-Cheng. Surface Properties of Branch-chain Isomers of Pentadecyl m-Xylene Sodium Sulfonates Solution and Solvent Behavior[J]. Chinese Journal of Applied Chemistry, ;2009, 26(9): 1023-1026. shu

Surface Properties of Branch-chain Isomers of Pentadecyl m-Xylene Sodium Sulfonates Solution and Solvent Behavior

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

Corresponding author: DING Wei,
Received Date: 15 August 2008
Available Online: 29 October 2008
Fund Project: 国家重点基础研究规划“九七三”资助项目(2005cb221300) (2005cb221300)

The surface properties of synthesized pentadecyl m-xylene sodium sulfonates in pure water and 0.039 3 mol/L isopropanol solution were measured.The measurements indicate that with the moving of the aryl from the terminal to the center of the long alkyl chain,the critical micelle concentration(cmc),the saturated adsorption area A_min and the negative logarithms of surfactant concentrations needed to reduce surface tension efficiency 20 mN/m(pc₂₀) increased.The standard free energy of adsorption(ΔG⁰) became more negative,the surface tension at the cmc(γ_cmc) and the maximum surface excess at the cmc(Γ_max) decreased.With the addition of isopropanol,the cmc decreased.The effects of molecular branched structures on surface properties were explained from the view of molecular structure.
- pentadecyl m-xylene sodium sulfonate,
- cmc,
- saturated adsorption capacity,
- surface tension
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