明胶和阳离子表面活性剂CTAB的相互作用

Interaction between Gelatin and Cationic Surfactant CTAB

采用电导法、荧光法、pH等方法研究了明胶与十六烷基三甲基溴化铵 (CTAB)的相互作用 .结果表明 ,在CTAB/明胶 /水体系中 ,明胶浓度的增大使得CTAB分子的cac1 ,cac2 ,cmc值均上升 ,胶束的聚集数下降 .冷冻蚀刻透射电镜实验(FFTEM)的结果证实了明胶分子与CTAB分子之间形成了复合物 ,随着CTAB浓度的增加 ,结构从线状、卷曲、珍珠项链状。

The interactions between gelatin and cetyltrimethyl ammonium bromide (CTAB) have been studied by the methods of conductivity, fluorescence and pH. The results indicate that with adding of gelatin the values of cac 1, cac 2, cmc increase and the micelle aggregation number reduces in the CTAB/gelatin/H 2O system. The freeze fracture transmission electron microscopy experiment shows that the complex forms between CTAB and gelatin molecules, and the structure of the complex changes from linear, curl, bead necklace, then rod like, finally to netlike structure sequentially with increasing the concentration of CTAB.