کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9675579 1454100 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of hydrophobicity of zwitterionic surfactants and triblock polymers on their mixed micelles: A fluorescence study
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Effect of hydrophobicity of zwitterionic surfactants and triblock polymers on their mixed micelles: A fluorescence study
چکیده انگلیسی
The pyrene fluorescence measurements of various zwitterionic + triblock polymer surfactant mixtures have been carried out at 25 °C. From the variation of I1/I3 intensity ratio of pyrene fluorescence, the critical micelle concentration (cmc) and other related micellar parameters of single and mixed surfactants have been determined. The nature of the mixed micelles has been evaluated with the help of regular solution and Motomura's approximations. It has been observed that the magnitude of synergistic mixing of zwitterionic and triblock polymer components in the mixed state is mainly governed by both the hydrophobicity of zwitterionic and triblock polymer components. The synergism reduces with an increase in the hydrophobicity of either of the two or both the components. The origin of synergistic interactions has been attributed to the cationic part of the polar head group repulsions by the intercalation of PEO units of triblock polymers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 269, Issues 1–3, 1 November 2005, Pages 72-79
نویسندگان
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