日用化学工业（中英文）2026，Vol.56Issue(2)：158-168,11.DOI:10.3969/j.issn.2097-2806.2026.02.003
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
Emulsifying properties of an isomer of sodium cetyl-o-xylene sulfonate and its microscopic mechanism at oil-water interface
摘要
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.关键词
乳化特性/界面性质/聚集行为/分子动力学Key words
emulsification property/interfacial property/aggregation behavior/molecular dynamics分类
化学化工引用本文复制引用
马小荣,黄金,徐研,李锋,高清河,李翠勤..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[J].日用化学工业（中英文）,2026,56(2):158-168,11.基金项目
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) （GA20A201）
