有机阴离子对阳离子双子表面活性剂溶液黏温性能的影响

Effects of Organic Anionic Additives on Viscosity-temperature Characteristic of Cationic Gemini Surfactant Solution

研究了阳离子双子表面活性剂GC-18的黏度与浓度的关系,考察了有机阴离子添加剂水杨酸钠和阴离子双子表面活性剂对GC-18溶液黏温性的影响。GC-18溶液的黏度随浓度的增加而升高。水杨酸钠浓度增加,GC-18溶液的黏度先增加后降低。阴离子双子表面活性剂的加入可明显改善GC-18溶液的黏温性,且阴离子双子表面活性剂的浓度越高、烷基链越长,对GC-18溶液的黏温性影响越大。水杨酸钠与阴离子双子表面活性剂对阳离子双子表面活性剂有协同增黏作用,低温下协同增黏效果明显。温度升高导致双子表面活性剂溶液中聚集体结构改变的问题,不能通过提高混合溶液中各组分的浓度来解决。

The viscosity concentration relationship of cationic Gemini surfactant （ GC 18 ） solution was studied. The effects of organic anionic additives on the viscosity temperature characteristic of GC 18 solu tion were investigated. The viscosity of GC 18 solution increased with the increase of its concentration. The viscosity of GC 18 solution increased at first and then decreased while the concentration of sodium salicylate increased. Adding anionic Gemini surfactant, the viscosity temperature characteristic of GC 18 solution im proved significantly. The higher the concentration and the longer the alkyl chain of anionic Gemini surfactant were, the greater the effects on the viscosity temperature characteristic of GC 18 solution were. There was a snynergism between sodium salicylate and anionic Gemini surfactant for increasing the viscosity of cationic Gemini surfaetant solution, which was more obvious at low temperature. Temperature rise resultedlin the struc tural change of the aggregate in Gemini surfactant solution, which couldn＇t be solved by increasing the concen tration of each component in the mixed solution.