日用化学工业（中英文）2023，Vol.53Issue(9)：989-998,10.DOI:10.3969/j.issn.2097-2806.2023.09.001
琥珀酸酯磺酸盐物化特性及其与甜菜碱复配体系界面性能
Physicochemical properties of ethoxylated sulfosuccinate surfactants and their interfacial properties when mixed with a betaine surfactant
摘要
Abstract
To enhance oil recovery in low-permeability reservoirs through the injection of low-mineralized water,the foaming behavior,surface tension and interfacial tension of a series of ethoxylated sulfosuccinate surfactants(C12EO6-CnMS,n=10,12,14 and 16)were investigated.The interfacial properties of mixtures of C12EO6-CnMS and a betaine surfactant were also studied,and the minimum alkane carbon number(Nmin)of the mixed system was obtained.The experimental results showed that C12EO6-CnMS exhibited low-foaming properties.The critical micelle concentration(cmc)of the surfactants decreased when the carbon chain length of the fatty alcohol(n)attached to ester group was increased.The addition of inorganic salts could reduce the cmc of C12EO6-CnMS,and the more inorganic salt,the more reduction of cmc.The mixed system of C12EO6-C10MS(in which the fatty alcohol carbon chain length was C10)and the betaine surfactant C16ZC displayed synergistic effect,exhibiting smaller cmc.The interfacial tension(IFT)between C12EO6-CnMS and n-alkanes increased as the carbon chain length(n)of the surfactants increased.The scanning of IFT values between C12EO6-CnMS and a series of n-alkanes was operated to determine the minimum alkane carbon number(Nmin)for the surfactant.Notably,the Nmin value increased with the addition of inorganic salts.In the presence of 0.5%-1%NaCl,the Nmin values for C12EO6-C10MS and C12EO6-C12MS are 12-14.As for surfactant mixtures,in the presence of 0.5%-1%NaCl,when the molar ratios of C12EO6-C10MS to C16ZC are 4/1,3/2 and 2/3,the mixtures exhibited synergistic effect in reducing interfacial tension,achieving ultra-low to low IFT values(10-3-10-2 mN/m)against dodecane,tetradecane and cetane.It makes the system suitable for enhanced oil recovery(EOR)of crude oil with equivalent alkane carbon number(EACN)of 12-16.关键词
琥珀酸异酯磺酸盐/甜菜碱表面活性剂/表/界面张力/烷烃碳数/提高采收率Key words
sulfonated maleic diester/betaine surfactant/surface/interfacial tension/alkane carbon number/enhanced oil recovery分类
化学化工引用本文复制引用
常世腾,蔡小军,郑延成,刘雪瑾,易晓,蒋筑阳..琥珀酸酯磺酸盐物化特性及其与甜菜碱复配体系界面性能[J].日用化学工业（中英文）,2023,53(9):989-998,10.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）
