正负离子表面活性剂在短链脂肪醇/水中沉淀-囊泡转化和双水相的形成

首次报道在短链脂肪醇/水溶剂中十二烷基硫酸钠和辛基三甲基溴化铵混合体系由沉淀转化为囊泡，并出现表面活性剂双水相的新现象，以期探索正负离子表面活性剂混合体系研究的新途径。     

Structure and physico-chemical properties in mixed aqueous solution of sodium alkvicarboxylate-alkyltrimethylammonium bromide

The physico-chemical properties of organized assemblies (micelle or vesicle ) from sodium alkylcarboxylate - alkyltrimethyl -ammonium bromide mixture have been investigated systematically. In different mixed cationic-anionic surfactant systems, micelles and vesicles can coexist or be transformed into each other on different conditions. The experimental results are explained prelimilarily from the viewpoint of molecular packing geometry. The solubilization of organic compound in the mixed surfactant system was also studied in detail.     

正负离子表面活性剂混合体系中高稳定性囊泡的形成

对总浓度为0.01 mol/L，摩尔比为2：1的十二烷基硫酸钠/溴化十二烷基三乙 铵的正负离子表面活性剂混合体系形成的囊泡的稳定性进行了研究。发现这一体系 形成的囊泡在长放置（5个月）后依然存在。在加入较大量的无机盐（0.15 mol/L NaBr）、较大幅度pH变化（pH = 2～12）、温度变化（从80 ℃到-22 ℃）情况下 体系中的囊泡依然呈现出优异的稳定性。在非水溶剂乙醇（100%）中这类正负离子 表面活性剂仍然可以形成囊泡。     

烷基氯化铵体系中分子有序组合体的转化

采用动态光散射、吸收光谱、粘度及电镜透射等方法研究了烷基氯化铵在弱碱性条件下溶液浓度变化对分子有序组合体结构的影响.当表面活性剂浓度大于cmc时,分子有序组合体的形态随表面活性剂浓度的增加出现胶团-囊泡-球状胶团的转化过程,这与水解产生的极性有机物烷基胺量的变化密切相关.     

一含肉桂酸的单链Bola型两亲分子在有机溶剂中的光致二聚和聚集行为

制备了一种含肉桂酸基团的Bola型两亲分子HDC(4-(10-羟基癸氧基)-10-羟基癸氧基肉桂酸酯). 第一次观察到该分子在有机溶剂中经紫外光照发生光致二聚. 分离出来的二聚HDC在20%的乙醇/水混合溶剂中能形成球形的囊泡. 同时发现溶剂的介电常数大小与光致二聚过程密切相关, 介电常数的大小不仅关系到反应发生与否, 而且直接影响到反应的速率.     

A study on organized assemblies in the sodium alkylcarboxylate/fatty alcohol/water systems

The phase behavior and evolution of self-organized assembling structures in the sodium alkylcarboxylate/fatty alcohol systems were investigated by TEM.With increasing concentration of fatty alcohol,the micelles transform into lamellar La phase,sponge L3 phase,multilamellar vesicle,and transfonn back to lamellar La phase.At higher alcohol concentration,a stable two aqueous phase coexisting region has been observed in this kind of systems after aged two months.Unilamellar vesicles were found both in two separated phases but the vesicle density of the upper phase is much higher than that of the bottom phase.