کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
596118 1454035 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
pH-responsive behavior of hydrogel microspheres altered by layer-by-layer assembly of polyelectrolytes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
pH-responsive behavior of hydrogel microspheres altered by layer-by-layer assembly of polyelectrolytes
چکیده انگلیسی

We used the layer-by-layer method and an anionic microgel as a substrate to study the influence of consecutive polyelectrolyte adsorption treatment on the pH-responsive changes in the size of the microgel. Treatments with poly(allylamine hydrochloride) and branched poly(ethyleneimine), which penetrated the microgel, led to the formation of a “complex shell” and the behavior analogous to that of an amphoteric microgel, respectively. In contrast, high molecular weight chitosan adsorbed almost at the edge of the microgel surface; and the resultant microgel maintained nearly the same pH-response as the original microgel. This study shows that the pH-response of the microgel can be controlled by the type of polyelectrolytes adsorbed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 337, Issues 1–3, 1 April 2009, Pages 159–163
نویسندگان
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