日用化学工业（中英文）2023，Vol.53Issue(6)：609-616,8.DOI:10.3969/j.issn.2097-2806.2023.06.001
十四酸单乙醇酰胺醚磺酸盐与烷醇酰胺的复配性能研究
Properties of mixtures of tetradecanoic acid monoethanolamide ether sulfonate and tetradecanoic acid diethanolamide
摘要
Abstract
To meet the requirements of oil production in high-salinity reservoirs,tetradecanoic acid monoethanolamide ether sulfonate(C14NE3S)was prepared from tetradecanoic acid monoethanolamide by ethoxylation and sulfonation.The solubility and the surface tension of the product were measured.The properties of C14NE3S when mixed with tetradecanoic acid diethanolamide(C14DN)were investigated.The interfacial activity between the binary mixed system and Changqing crude oil in mineralized water was also measured.The results showed that the aqueous solution of C14NE3S remained clear in 30％NaCl at above 30℃.The critical micelle concentrations of tetradecanoic acid monoethanolamide polyoxyethylene ether(C14NE3)and C14NE3S in distilled water were 0.07 and 0.158 mmol/L,respectively,indicative of the enhancement of hydrophilicity of C14NE3S due to the multiple hydrophilic groups.The theoretical study on solution thermodynamics showed that C14NE3S had synergism with C14DN for the formation of mixed micelles,especially when the molar fractions of C14NE3S were fixed to 0.2 and 0.4,the mixed systems showed moderate interaction.The interfacial tension of mixed surfactants in which the molar fraction of C14NE3S was 0.2 could be ultra-low to low(i.e.,10-3-10-2 mN/m)in the presence of 0.3％-10％NaCl.The interfacial tension of mixed surfactant systems when n(C14NE3S)∶n(C14DN)= 2∶3 and 3∶2 could be ultra-low(order of magnitude,10-3 mN/m)at 0.3％-3％NaCl and 5％-10％NaCl,respectively.The mixed system with n(C14NE3S)∶n(C14DN)of 1∶4 could show ultra-low interfacial tension at 0.3％-1％NaCl.This work could have a certain guiding role for the development of temperature-and salt-resistant oil-displacement surfactant systems.关键词
十四酸单乙醇酰胺醚磺酸盐/烷醇酰胺/相互作用/表/界面张力/耐盐Key words
tetradecanoic acid monoethanolamide ether sulfonate/alkanolamide/interaction/surface/interfacial tension/salt resistance分类
化学化工引用本文复制引用
易晓,田富全,郑延成,王帅栋,蔡小军,罗芳草,常世腾..十四酸单乙醇酰胺醚磺酸盐与烷醇酰胺的复配性能研究[J].日用化学工业（中英文）,2023,53(6):609-616,8.基金项目
国家自然科学基金面上项目(51774049) （51774049）
长江大学大学生创新创业训练计划项目(YZ2020100) （YZ2020100）
