کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9675997 | 1454111 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Studies on the effects of amino acids on micellization of CTAB via surface tension measurements
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The effects of amino acids on the cmc of cetyltrimethylammonium bromide (CTAB) in the Tris-HCl buffer solution were studied by surface tension measurement. The results show that the effect of the additives depends on their nature and concentration at a fixed temperature. For the three amino acids, steric effect is predominant over hydrophobicity during the interaction process between them and CTAB. The cmc and surface tension at the cmc (γcmc) of CTAB in the presence and absence of glycine at different temperature decrease with the increase of temperature. The thermodynamic parameters of micellization were determined and an enthalpy-entropy compensation effect was observed for the systems. The cmc of CTAB decreases with the increasing concentration of glycine.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 257â258, 5 May 2005, Pages 375-379
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 257â258, 5 May 2005, Pages 375-379
نویسندگان
Li Yu, Ting Lu, Yu-Xia Luan, Jing Liu, Gui-Ying Xu,