阳离子表面活性剂胶束和微乳液增溶过程的核磁共振谱法研究(英文)  

NMR Studies about Solubilization of Cationic Surfactant Micelles and Reversed Microemulsion

作　　者：周国伟[1] 李干佐[1] 徐健[1] 郑立强[1] 隋华[1] 

机构地区：[1]山东大学胶体与界面化学教育部重点实验室,山东济南250100

出　　处：《日用化学品科学》2000年第S2期45-48,70,共5页Detergent & Cosmetics

摘　　要：运用高分辩NMR方法 ,研究了阳离子表面活性剂十六烷基三甲基溴化铵 (CTAB)胶束水溶液、KBr盐溶液对苯甲醇的增溶作用及CTAB/正丁醇 /10 %正辛烷 /水反向微乳液对丙烯酰胺(AM)的增溶作用。结果表明 ,在苯甲醇浓度低时苯甲醇主要增溶于CTAB胶束水溶液或KBr盐溶液的界面层 ,随着增溶物浓度的增大 ,苯甲醇主要增溶于胶束的栅栏层和胶束内核。在CTAB胶束水溶液中 ,当苯甲醇浓度达到 0 35 7(V/V)时 ,它沿烃链的增溶达到饱和 ,并开始进入胶束内核中心 ,并引起CTAB长链亚甲基峰分裂成两个单峰 ,一个在高场 ,一个在低场 ,而在CTAB胶束KBr盐溶液中 ,未得到长链亚甲基的分裂峰。在CTAB油包水 (W /O)微乳液中 ,通过 1H和 13CNMR谱讨论了丙烯酰胺与CTAB和正丁醇的相互作用 ,丙烯酰胺浓度较小时 ,其增溶在微乳液的Stern层 ,当丙烯酰胺与CTAB摩尔比接近 0 75时 ,丙烯酰胺分子增溶到栅栏层 。WT5”BZ]: The solubilization of moderately polar benzyl alcohol in CTAB (cetyltrimethyl ammonium bromide) aqueous or KBr salt micelles and of acrylamide(AM) in CTAB reversed microemulsion(W/O) have been investigated by high resolution nuclear magnetic resonance spectroscopy(NMR). The results indicate that benzyl alcohol in CTAB aqueous or KBr salt micelles is adsorbed on the micelle-water interface at a low concentration, with the increasing of solubilized concentration, it is preferential solubilized both in the palisade and in centre of the micelle core. The single signal of the methylene chain in CTAB split into an up-field signal and a down-field signal. But in dilute solute solutions of CTAB/KBr(0 01M) the splitting of the signal of the methylene chain is not clear. In CTAB reversed microemulsion(W/O) acrylamide is solubilized in the stern layer of microemulsion at low AM concentration, but when the mole ratio of acrylamide to CTAB approaches 0 75 acrylamide is solubilized in palisade layer and distributed along the hydrocarbon chain of CTAB.

关 键 词：核磁共振谱法 胶束 微乳液 增溶 

分 类 号：O647[理学—物理化学]