Gemini表面活性剂己二烯-1,6-双（十二烷基二甲基溴化铵）与聚电解质聚丙烯酸钠的相行为
Phase behavior of gemini surfactant hexylene-1,6-bis(dodecyldimethylammonium bromide) and polyelectrolyte NaPAA.
作者信息
Pi Yingying, Shang Yazhuo, Peng Changjun, Liu Honglai, Hu Ying, Jiang Jianwen
机构信息
Department of Chemistry and Lab for Advanced Materials, East China University of Science and Technology, Shanghai 200237, China.
出版信息
J Colloid Interface Sci. 2006 Jul 1;299(1):410-5. doi: 10.1016/j.jcis.2006.01.035. Epub 2006 Feb 14.
The phase behavior of aqueous mixtures of gemini surfactant hexylene-1,6-bis(dodecyldimethylammonium bromide) (12-6-12) and oppositely charged polyelectrolyte sodium polyacrylate (NaPAA) has been studied experimentally. Compared to the mixtures of the traditional surfactant dodecyltrimethylammonium bromide (DTAB) and NaPAA, the gel phase region in the 12-6-12/NaPAA solution is larger. Element analysis reveals that NaPAA in the gel phase tends to replace the counterions of surfactant micelle and to release its own counterions. Spherical aggregates are observed in either top or bottom gel phase as detected by transmission electron microscopy. The addition of sodium bromide (NaBr) leads to a decrease in the gel phase region and the occurrence of a new cream phase.
对双子表面活性剂己烷-1,6-双（十二烷基二甲基溴化铵）（12-6-12）与带相反电荷的聚电解质聚丙烯酸钠（NaPAA）的水性混合物的相行为进行了实验研究。与传统表面活性剂十二烷基三甲基溴化铵（DTAB）和NaPAA的混合物相比，12-6-12/NaPAA溶液中的凝胶相区域更大。元素分析表明，凝胶相中的NaPAA倾向于取代表面活性剂胶束的抗衡离子并释放其自身的抗衡离子。通过透射电子显微镜检测，在顶部或底部凝胶相中均观察到球形聚集体。添加溴化钠（NaBr）会导致凝胶相区域减小并出现新的乳状相。
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