Effect of Short Chain Alcohols upon Viscosity of TTAB Solution  

作　　者：Yun-fei Yan Hua-zhen Li Hai-yang Yang Jia-sheng Qian Ping-ping Zhu Ping-sheng He 

机构地区：[1]Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China

出　　处：《Chinese Journal of Chemical Physics》2008年第2期169-173,共5页化学物理学报（英文）

摘　　要：The effect of ethanol （C2H5OH）, propanol （C3H7OH）, and butanol （C4H9OH） upon the viscosity of tetradecyltrimethylammonium bromide （TTAB） solution in the presence or absence of KBr at 30℃was investigated, where the surfactant concentration CS is kept constant. In the absence of KBr, the relative viscosity ηr of TTAB solution increases linearly with the alcohol concentration CA, indicating that the alcohols do not promote micelle formation of TTAB. In the presence of KBr, ηr linearly decreases with CA for C2H5OH, but it exhibits a maximum with increasing CA for C3H7OH or C4H9OH. The facts reveal that C2H5OH or C4H9OH promotes the micelle formation of TTAB. A possible explanation is that the hydrophobicity of the mieellar interior is enhanced by KBr, so that C2H5OH or C4H9OH can dissolve in micelle and promotes micelle formation. In the presence of KCl, which is less efficient in promoting the micelle formation of cationic surfactant, both C3H7OH and C4H9OH have only a slight effect on the micelle formation. In contrast, due to the hydrophilicity, C2H5OH cannot dissolve in micelles in the presence of KBr or KCl.

关 键 词：Relative viscosity Cationic surfactant Organic additive Hydrophobic interaction 

分 类 号：TS262.2[轻工技术与工程—发酵工程] TS802.3[轻工技术与工程—食品科学与工程]