外加盐作用形成的正负离子表面活性剂双水相  

Aqueous Two phase System of Catanionic Surfactant Mixtures Formed by Adding Salts

作　　者：陈莉[1] 肖进新[1] 马季铭[1] 

机构地区：[1]北京大学化学与分子工程学院,北京100871

出　　处：《物理化学学报》2003年第7期577-579,共3页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(29973002;20273006)资助项目~~

摘　　要：癸基三乙基溴化铵-癸基磺酸钠(C10NE-C10SO3)等摩尔混合均相体系(即使在表面活性剂总浓度高达0.2mol·L-1时仍然可形成稳定的均相溶液)在外加盐NaF、Na2SO4和Na3PO4的作用下可自发分离成两个水相(双水相).研究了该类双水相体系的形成、相行为及其对牛血清蛋白(BSA)的分配,并与普通的正负离子表面活性剂混合双水相体系进行了比较.结果表明,该类双水相体系克服了普通的正负离子表面活性剂混合双水相体系的一些不足,具有一些独特的优点.该类双水相体系的相行为可以通过外加盐进行调控,通过外加盐的种类来调控和优化BSA的分配行为.The equimolar mixed system of decyltriethylammonium bromide and sodium decylsulfonate, which was homogeneous solution even with the total surfactant concentration increasing up to 0.2 mol . L-1, formed aqueous two-phase system(ATPS) when salts, such as NaF, Na2SO4 or Na3PO4, were added. The phase behavior and partitioning of BSA in this salt-induced ATPS were studied. Compared with the usual ATPS of catanionic surfactant mixtures, this salt-induced ATPS exhibited some special advantages, and overcame some shortcomings of the usual ATPS. It was shown that the phase behavior of this salt-induced ATPS could be adjusted by adding salts and the partition coefficient of BSA could be altered and optimized by salt species.

关 键 词：外加盐作用 正负离子表面活性剂混合体系 双水相 蛋白质 癸基三乙基溴化铵-癸基磺酸钠 

分 类 号：O647.2[理学—物理化学]