THE EFFECT OF BENZYL ALCOHOL ON THE MICELLAR PROPERTIES OF CTAB IN KBr SOLUTION |
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| Authors: | Wei-Can Zhang Gan-Zuo Li Jian-Hai Mu Li-Qiang Zheng Hao-Jun Liang Chi Wu |
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| Institution: | 1. Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, Shandong University , Jinan, P. R 250100, China;2. The Open Laboratory for Bond Selective Chemistry, Department of Chemical Physics , University of Science &3. Technology of China , Hefei, Anhui, 230027, P. R. China |
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| Abstract: | ABSTRACT The effect of benzyl alcohol on the micellar size and shape of CTAB in KBr solution has been investigated by means of viscosity, LLS (laser light scattering), and NMR measurements. The surfactant CTAB (cetyltrimethylammonium bromide) and KBr content are kept constant at 0.01 mol.L?1 and O.l?1 mol.. The data from the various techniques are quantitatively in agreement. The viscosity of 0.01 mol.L?1 CTAB/ 0.01mol.L?1 KBr micellar system has a marked maximum at benzyl alcohol content 0.6%(v/v), where the size of rod micelles are largest. The results from 'H-NMR spectra of CTAB molecules show that before the maximum viscosity, benzyl alcohol is located in the interfacial region of CTAB micelles in the presence of KBr salt. If more benzyl alcohol is added, it starts solubilizing in the palisades of the micelles. |
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| Keywords: | Critical coagulating concentration hydrodynamics diameter turbidity water soluble phenol-formaldehyde resin Zeta potential |
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