کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
597374 1454069 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of ionic strength, electrolyte type and preparation procedure on formation of weak polyelectrolyte complexes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
The influence of ionic strength, electrolyte type and preparation procedure on formation of weak polyelectrolyte complexes
چکیده انگلیسی

The influence of ionic strength, electrolyte type and preparation procedure on formation of weak polyelectrolyte complexes formed by mixing aqueous solutions of poly(dimethylaminoethyl methacrylate) (PAMA) and poly(acrylic acid) (PAA) was investigated. For that purpose, nephelometric, electrokinetic and microcalorimetric measurements were performed. The influence of preparation procedure on formation of polyelectrolyte complexes was much more pronounced at lower ionic strength (50 mmol dm−3) than at higher ionic strength (200 mmol dm−3). The effect of KCl, NaNO3 and phosphate buffer on weak polyelectrolyte complex formation is discussed. The obtained results are compared with earlier studies of effects of electrolyte type and ionic strength on multilayers formed by alternate adsorption of PAMA and PAA at silica surface. It has been shown that the formation of polyelectrolyte multilayers on metal oxide surface is largely governed by the phase behaviour of polyelectrolyte complexes in solutions and that the presence of different salts influences in similar manner both polyelectrolyte complex formation and polyelectrolyte multilayer formation process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 302, Issues 1–3, 20 July 2007, Pages 107–112
نویسندگان
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