کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
596325 1454041 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Application of amphiphilic polysaccharides as stabilizers in direct and inverse free-radical miniemulsion polymerization
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Application of amphiphilic polysaccharides as stabilizers in direct and inverse free-radical miniemulsion polymerization
چکیده انگلیسی

Polymeric surfactants were prepared from dextran, a neutral bacterial polysaccharide. Three series of dextran derivatives were studied: neutral dextran derivatives obtained by the attachment of hydrocarbon groups (C6 and phenoxy) to dextran chains, anionic dextran derivatives obtained by further modification of phenoxy-modified dextrans, polylactide grafted dextran copolymers obtained by a well-controlled three-step procedure. Submicronic emulsions (direct or inverse) with a controlled average diameter can be prepared by selecting the operating conditions and the polymeric surfactant used. Polymeric nanoparticles (either bulk polymer or covalent networks swelled by water) were prepared by free-radical miniemulsion polymerization. The surface of the nanoparticles is covered by a physically and/or covalently attached polysaccharide layer. The average size of the latex particles is correlated to that of the initial emulsion droplets provided that the steric stabilization of the initial droplets is enough. The surface coverage of the nanoparticles was investigated and related to the polymerization conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 331, Issues 1–2, 10 December 2008, Pages 84–90
نویسندگان
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