添加剂对C_(1)2-2-C_(12)·2Br水溶液黏度的调节  

Regulation of viscosity of gemini surfactant C_(12)-2-C_(12)·2Br aqueous solution with additives

作　　者：刘金彦[1] 许嘉[1] 

机构地区：[1]内蒙古科技大学化学与化工学院,内蒙古包头014010

出　　处：《日用化学工业》2009年第6期378-381,共4页China Surfactant Detergent & Cosmetics

基　　金：内蒙古自然科学基金资助项目(20080404MS0210);内蒙古高等学校科学研究资助项目(NJZY07104)

摘　　要：利用流变仪测定了表面活性剂水溶液的黏度,研究了不同添加剂对季铵盐gemini表面活性剂C12-2-C12.2Br水溶液的黏度调节情况。实验结果表明,C12-2-C12.2Br在水溶液中可以形成较大的棒状胶团,加入头基长度不同的阳离子表面活性剂,由于头基间的静电排斥作用使混合胶团中形成分子对的几何堆积因子P减小,形成了球状胶团,使C12-2-C12.2Br水溶液的黏度降低,加入普通表面活性剂对C12-2-C12.2Br的黏度降低的能力和效率顺序为C12TMABr>C12TBABr>C12TPABr>C12TEABr。相反,加入与C12-2-C12.2Br带相反电荷的阴离子表面活性剂或者无机盐,由于头基之间的静电吸引作用和压缩双电层作用,使表面活性剂分子的几何堆积因子增大,造成黏度增加。Regulation of viscosity of gemini surfactant C12-2-C12·2Br aqueous solution by using various additives was studied.The viscosity of surfactant aqueous solution was measured by rheometer.Experimental results showed that C12-2-C12·2Br can form rather large rod shape micelles.Addition of cationic surfactants with different head group,will reduce the viscosity of the blended surfactant solution rapidly due to the action of the electrostatic repulsion force between the same charged heads,which leads to decrease of the packing parameter P of molecule-pair and forms spherical micelles.The order of the viscosity reduction efficiency and effectiveness is C12TMABrC12TBABrC12TPABrC12TEABr.On the contrary,addition of an oppositely charged surfactant or inorganic salt will increase the viscosity since the P of surfactant molecule increases through electrostatic attraction between the oppositely charged heads or compression of the electric double layer.

关 键 词：表面活性剂 C12-2-C12.2Br 添加剂 黏度 

分 类 号：TQ423[化学工程]