Determination of the Diffusion Coefficient for SDS Micelle with Different Shape and the Effects of Ethanol by Cyclic Voltammetry Without Probes
作者:
Liu Tianqing,
Guo Rong,
Song Genping,
期刊:
Journal of Dispersion Science and Technology
(Taylor Available online 1996)
卷期:
Volume 17,
issue 5
页码: 509-526
ISSN:0193-2691
年代: 1996
DOI:10.1080/01932699608943520
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Micelle diffusion coefficient of SDS with different micelle shape in aqueous and water-ethanol solutions are determined by cyclic voltammetry without any probe. The diffusion coefficient decreases with as increasing SDS concentration. The first critical micellar concentration is 8.0xl03, mol 11.corresponding to the transformation from premicelle to spherical micelle. The second critical micellar concentration is 5.60x102and corresponding to transformation from spherical micelle to rod-like micelle. The less the weight ratio of SDS to ethanol is, the larger the diffusion coefficient is. The influence of added water to the micelle solution is almost the same for SDS-ethanol-HaO system with different micelle shape. Mechanism of electrochemical reaction for SDS at platinum electrode is discussed as well.
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