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日用化学工业（中英文）

日用化学工业（中英文） ›› 2026, Vol. 56 ›› Issue (2): 158-168.doi: 10.3969/j.issn.2097-2806.2026.02.003

• 基础研究 • 上一篇    下一篇

十六烷基邻二甲苯磺酸钠的乳化特性及油水界面微观作用

马小荣1,黄金1,2,徐研1,李锋1,高清河2,李翠勤1,*()   

  1. 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，黑龙江 大庆 163318
    2.大庆师范学院 油田应用化学与技术省重点实验室，黑龙江 大庆 163712
  • 收稿日期:2025-04-10 修回日期:2026-01-22 出版日期:2026-02-22 发布日期:2026-03-09
  • 基金资助:
    黑龙江省应用技术研究与开发计划项目“大庆三类油藏原位自增稠/超低张力循环驱油体系及其应用技术开发”(GA20A201)

Emulsifying properties of an isomer of sodium cetyl-o-xylene sulfonate and its microscopic mechanism at oil-water interface

Xiaorong Ma1,Jin Huang1,2,Yan Xu1,Feng Li1,Qinghe Gao2,Cuiqin Li1,*()   

  1. 1. Provincial Key Laboratory of Petroleum and Natural Gas Chemical Industry, School of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
    2. Provincial Key Laboratory of Oilfield Applied Chemistry and Technology, Daqing Normal University, Daqing, Heilongjiang 163712, China
  • Received:2025-04-10 Revised:2026-01-22 Online:2026-02-22 Published:2026-03-09
  • Contact: E-mail: licuiqin78@163.com.

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摘要：

重烷基苯磺酸盐作为重要的驱油用表面活性剂，其乳化特性及在油/水界面的微观作用机制直接影响其驱油效率及采出液的油/水分离效果。文章采用多重光散射技术和分子动力学模拟分别研究了十六烷基邻二甲苯磺酸钠（C16S）的乳化特性及其在油/水界面的微观作用机理，并分析了C16S质量浓度、温度及NaCl质量浓度对油/水界面特性的影响。结果表明：C16S显著提高了水包油（O/W）型和油包水（W/O）型模拟乳状液的稳定性。C16S质量浓度从10 mg/L上升到60 mg/L，模拟乳状液的Turbiscan稳定性指数（TSI）和析水率（X）均降低，而油包水（W/O）型模拟乳状液的背散射光强平均值（BSavg）从24.02%增加到36.12%，水包油（O/W）型模拟乳状液的透射光强平均值（Tavg）由7.72%下降至1.52%。分子动力学（MD）模拟结果表明：随着C16S分子数量增加，径向分布函数峰值强度增强，界面厚度增大，界面能降低，界面膜的稳定性增大；温度升高导致C16S的径向分布函数峰强度略微下降，界面厚度和界面能均增加；NaCl分子数对界面厚度和界面能影响较小。

关键词: 乳化特性, 界面性质, 聚集行为, 分子动力学

Abstract:

As an important type of surfactants for oil flooding, the emulsification properties of heavy alkylbenzene sulfonates and their microscopic action mechanism at oil-water interface significantly affect the efficiency of oil flooding and the oil-water separation in the produced liquid. In this work, the emulsification properties of an isomer of sodium cetyl-o-xylene sulfonate（C16S）and its microscopic action mechanism at oil-water interface were investigated, and the influences of surfactant concentration, temperature, and NaCl concentration on the oil-water interfacial properties were also examined. The results showed that C16S significantly improved the stability of O/W and W/O simulated emulsions. When the mass concentration of C16S was increased from 10 mg/L to 60 mg/L, the Turbiscan stability index（TSI）and water separation percent（X）of the simulated emulsion both decreased, while the average backscattering light intensity（BSavg）of the W/O emulsion increased from 24.02% to 36.12%, and the average transmitted light intensity（Tavg）of the O/W emulsion decreased from 7.72% to 1.52%. The results of molecular dynamics（MD）simulation showed that, when the number of C16S molecules increased, the peak strength of radial distribution function increased, the interface thickness increased, and the interface energy decreased, thus leading to the increase in the stability of interfacial film. Raising temperature resulted in a slight decrease in the peak strength of radial distribution function of C16S, and the increases in both interface thickness and interface energy. The effects of the number of NaCl molecules on interface thickness and interface energy were both relatively small.

Key words: emulsification property, interfacial property, aggregation behavior, molecular dynamics

中图分类号: 

  • TQ423