羧酸盐双子表面活性剂溶液黏度行为研究  

Study on viscosity behavior of carboxylate Gemini surfactant solution

作　　者：赵成洋 唐善法[1] 田磊[1] 薛汶举 周天元[1] 崔琰奇 

机构地区：[1]长江大学石油工程学院,湖北武汉430100

出　　处：《现代化工》2017年第2期125-128,共4页Modern Chemical Industry

基　　金：国家自然科学基金项目(51474035);非常规油气湖北省协同创新中心创新基金(HBUOG-2014-2);湖北省教育厅科学研究计划指导性项目(B2015451)

摘　　要：在合成系列羧酸盐双子表面活性剂的基础上,采用MR301界面流变仪考察了质量分数、分子结构(疏水链长度及联接基碳数)、温度、剪切速率、无机盐对羧酸盐双子表面活性剂溶液黏度的影响,并用扫描电镜(SEM)观察其胶束微观结构。黏度测试结果表明,疏水链碳数(10≤m≤16)越多,羧酸盐双子表面活性剂增稠能力越强,溶液黏度突变所需活性剂质量分数越小;疏水链碳数(m=16)相同,联结基碳数(s=2、3、4)增加,其增稠能力越强,耐温性越好;随着无机盐质量分数的增加,羧酸盐双子表面活性剂DC 16-2-16溶液黏度先升高后降低,离子强度越强的无机盐其最佳加量越小;微观结构检测的SEM图证实了增长疏水链长度可以促进羧酸盐双子表面活性剂溶液中的胶束从线形向网状转变。Based on the synthesis of a series of carboxylate Gemini surfactant,the effects of molecular structure（length of hydrophobic chain and carbon number of spacer group）,concentration,temperature,shear rate and inorganic salt on viscosity behavior of carboxylate Gemini surfactant solution are investigated by the MR301 interfacial rheometer.The micellar microstructure is observed by scanning electron microscopy（SEM）. The results show that longer hydrophobic chains（10≤m≤16） result in stronger thickening ability of the carboxylate Gemini surfactants and lower concentration of active agent needed for the solution viscosity mutation. Moreover,with the constant of hydrophobic chain（m = 16）,more carbon number of spacer group（s = 2,3,4） leads to better thickening ability and temperature tolerance.The viscosity of DC16-2-16 solution is firstly increased then decreased with the increase of the mass fraction of inorganic salt. Smaller mass fraction is only needed for the inorganic salt with stronger ionic strength. SEM experiments show that the increase of the length of hydrophobic chain can lead to the transition of carboxylate anionic Gemini surfactant micelles from linear structure to network structure.

关 键 词：羧酸盐双子表面活性剂 分子结构 黏度行为 

分 类 号：TE39[石油与天然气工程—油气田开发工程]