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Citation: YU Tao, LIU Hongbin, DING Wei, SHI Peng, WEI Jijun, MAO Cheng, REN Ya'ni, QU Guangmiao. Relationship Between Relative Molecular Mass and Distribution of Alkyl Aryl Sulfonate Composite Systems and Surface Properties[J]. Chinese Journal of Applied Chemistry, ;2011, 28(7): 831-835. doi: 10.3724/SP.J.1095.2011.00517 shu

Relationship Between Relative Molecular Mass and Distribution of Alkyl Aryl Sulfonate Composite Systems and Surface Properties

1.
Chemistry and Chemical Engineering College of Northeast Petroleum University, Daqing 163318

Corresponding author: YU Tao,
Received Date: 6 September 2010
Available Online: 6 November 2010
Fund Project: 国家科技重大专项(2008ZX05011) (2008ZX05011)黑龙江省自然科学基金重点项目(ZJG0507) (ZJG0507)黑龙江省研究生创新科研基金(YJSCX2008-044HLJ)资助项目 (YJSCX2008-044HLJ)

The critical micelle concentrations(cmc,1×10^-5 mol/L) and the surface tensions(γ_cmc,mN/m) of nine alkyl aryl sulfonate composite systems were measured at 25℃.The relationship between composite system relative molecular mass and its distribution and surface properties was studied.The γ_cmc and cmc values of five distributions with the average relative molecular mass of 432 were determined as 2.341 and 28.96 for the incremental type molecular mass distribution;2.458 and 32.56 for the descending type distribution;3.667 and 36.14 for the normal type distribution;2.201 and 27.55 reverse normal type distribution;and 2.761 and 33.54 for the uniform type distribution,respectively.Moreover,the γ_cmc and cmc values for the descending distribution with four average relative molecular masses were determined as 3.786 and 29.54,3.530 and 29.81,2.458 and 32.56,8.337 and 29.54 for average relative molecular mass of 390,418,432 and 446,respectively.The adsorption capacity,Γ_max,the saturated adsorption 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 and a reasonable explanation was also presented.
- alkyl aryl sulfonate,
- composite system,
- relative molecular mass,
- relative molecular mass distribution,
- critical micelle concentration,
- surface tension
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