不同结构头基对阴/非离子表面活性剂混合体系胶团化行为的影响  

Effect of Different Head Group Structures on Micellization Behavior of Anionic/Nonionic Surfactant Systems

作　　者：牛迪[1] 岑桂秋[1] 李嘉诚[1] 张世鑫[1] 魏思宝[1] 李晓璇[1] 

机构地区：[1]海南大学材料与化工学院海南优势资源化工材料应用技术教育部重点实验室,海南海口570228

出　　处：《精细化工》2013年第10期1102-1107,共6页Fine Chemicals

基　　金："十二五"国家科技支撑计划资助项目(2011BAE06A06-7;2011BAE06B04-7);海南省重点科技计划资助项目(ZDXM20120003);海口市重点科技计划项目(2011-0104)~~

摘　　要：通过表面张力法和荧光探针法研究了含有不同反离子的阴离子表面活性剂十二烷基硫酸钠(NaDS)、十二烷基硫酸镁〔Mg(DS)2〕分别与头基结构不同的非离子表面活性剂n-十二烷基β-D-麦芽糖苷(DDM)、十二烷基聚四氧乙烯醚(Brij30)组成的二元混合体系的协同作用以及胶束性质。结果表明,各混合体系均存在较强的协同效应,且协同效应强弱顺序为:Mg(DS)2/DDM<NaDS/DDM<Mg(DS)2/Brij30<NaDS/Brij30。Mg(DS)2与非离子之间的吸引作用较NaDS的弱,Mg2+使MDS偏离标准值程度小于Na+。利用Maeda模型得到的相互作用结果与Rubingh理论所得结果一致。此外,相对于具有刚性头基结构的DDM,具有易弯曲柔性头基结构的Brij30更能促进混合胶束形成,反离子对混合体系的胶束聚集数和微极性影响较小。The micellization behavior of binary surfactant mixtures containing anionic surfactants with different counter ions viz. sodium dodecyl sulphate （NaDS） and magnesium dodeeyl sulphate [ Mg （DS）2] and nonionie surfaetants with different head group structures viz. n-dodeeyl-β-D-maltoside （DDM） and dodecyl tetraethylene glycol ether （Brij30） in aqueous solution was investigated respectively by surface tension and fluorescence probe methods. The results indicate that strong synergistic effect existed between the two components of micelles of all the mixed surfactant systems. The magnitude of synergistic effect followed the order Mg （DS） 2/DDM 〈 NaDS/DDM 〈 Mg （DS） 2/ Brij30 〈 NaDS/Brij30. Mg（DS） 2 had less interaction with nonionic surfactants in comparison to NaDS. Compared with Na ＋ , Mg2＋ had less effect on MDS deviation from standard state. The results of the interaction between surfactants and the contribution of free energy by Maeda＇s model were consistent with that of Rubingh＇s theory. Moreover, nonionic surfactant with the flexible head group encouraged the formation of the mixed micelle and counter ions had little impact on the aggregation and micropolarity of the mixed surfaetant systems.

关 键 词：表面活性剂头基结构 二元表面活性剂体系 协同作用 胶团化行为 

分 类 号：TQ423.46[化学工程]