Effect of KBr on the micellar properties of CTAB  

作　　者：ZHANG Weican LI Ganzuo MU Jianhai SHEN Qiang ZHENG Liqiang LIANG Haojun WU Chi 

机构地区：[1]Key Laboratory for Colloid and Interface Chemistry of State Education Ministry,Shandong University,Jinan 250100,China [2]Open Laboratory for Bond Selective Chemistry,Department of Chemical Physics,University of Science and Technology of China,Hefei 230027,China

出　　处：《Chinese Science Bulletin》2000年第20期1854-1857,共4页

摘　　要：The effect of KBr on the size, shape and microviscosity of CTAB micelles has been investigated by means of laser light scattering (LLS), 1H NMR measurements and fluorescence probe. The data obtained from the various techniques are quantitatively in agreement. The Rh of micelles in 0.01 mol ·L-1 CTAB solution increases from 3.5 nm to 43 nm and Rg increases to 89 nm with addition of KBr salt. In this process, both the microviscosity and molecular weight of micelles Mw have noticeable increases, too. The rod-like micelles are formed at 0.1 mol ·L -1 KBr and the worm-like micelles are formed at above 0.2 mol ·L-1 KBr.The effect of KBr on the size, shape and microviscosity of CTAB micelles has been investigated by means of laser light scattering (LLS),1H NMR measurements and fluorescence probe. The data obtained from the various techniques are quantitatively in agreement. The Rh of micelles in 0.01 rnol · L?1 CTAB solution increases from 3.5 nm to 43 nm andR g increases to 89 nm with addition of KBr salt. In this process, both the microviscosity and molecular weight of micelles Mw have noticeable increases, too. The rod-like micelles are formed at 0.1 rnol · L1 KBr and the worm-like micelles are formed at above 0.2 rnol · L-1 KBr.

关 键 词：MOLAR weight of MICELLE RADIUS of gyration hydrodynamic RADIUS sphere-rod transition. 

分 类 号：O611[理学—无机化学]