中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (07): 831-835.DOI: 10.3724/SP.J.1095.2011.00517

• 研究论文 • 上一篇    下一篇

烷基芳基磺酸盐相对分子质量及其分布与表面性能的关系

于涛*,刘宏彬,丁伟,史鹏,魏继军,毛程,任娅妮,曲广淼   

  1. (东北石油大学化学化工学院,石油与天然气化工省重点实验室 大庆 163318)
  • 收稿日期:2010-09-06 修回日期:2010-11-01 出版日期:2011-07-10 发布日期:2011-07-10
  • 通讯作者: 于涛,教授; Tel/Fax:0459-6504071; E-mail:yutao915@126.com; 研究方向：油田应用化学
  • 基金资助:
    国家科技重大专项（2008ZX05011），黑龙江省自然科学基金重点项目（ZJG0507），黑龙江省研究生创新科研基金（YJSCX2008-044HLJ）资助项目

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

YU Tao*, LIU Hongbin, DING Wei, SHI Peng, WEI Jijun, MAO Cheng, REN Ya′ni, QU Guangmiao   

  1. (Chemistry and Chemical Engineering College of Northeast Petroleum University,Daqing 163318)
  • Received:2010-09-06 Revised:2010-11-01 Published:2011-07-10 Online:2011-07-10

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摘要：

测定了自制的9种烷基芳基磺酸盐复配体系在25 ℃下的临界胶束浓度cmc(1×10-5 mol/L)及临界胶束浓度下的表面张力γcmc(mN/m)。 研究了烷基芳基磺酸盐相对分子质量及其分布与表面性能的关系。 平均相对分子质量432的5种分布cmc和γcmc值分别为：2.341和28.96（递增型分布）；2.458和32.56（递减型分布）；3.667和36.14（正态型分布）；2.201和27.55（反正态型分布）；2.761和33.54（均匀型分布）。 4种平均相对分子质量为390、418、432和446的递减型分布的cmc和γcmc值分别为：3.786和29.54;3.530和29.81；2.458和32.56；8.337和29.54。 根据Gibbs吸附公式求出饱和吸附量Γmax、饱和吸附面积Am及降低表面张力的效率因子pC20，对所得结果进行了解释。

关键词: 烷基芳基磺酸盐, 分子量, 分子量分布, 临界胶束浓度, 表面张力

Abstract:

The critical micelle concentrations(cmc,1×10-5 mol/L) and the surface tensions(γcmc,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 γcmc 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 γcmc 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, Γmax, the saturated adsorption area, Am, 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.

Key words: Alkyl aryl sulfonate, relative molecular mass, relative molecular mass distribution, Criticalmicelle concentration, surface tension

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