کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1396767 984193 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
New approach to the quaternization of chitosan and its amphiphilic derivatives
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
New approach to the quaternization of chitosan and its amphiphilic derivatives
چکیده انگلیسی

Regioselective quaternization of chitosan and its amphiphilic derivatives has been carried out by means of reaction with betaine in the presence of the coupling reagent 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ) in aqueous media at pH 5.5 ± 0.5. This reaction results in preparation of N-/(trimethylammonio)acetyl/chitosan chloride and its amphiphilic derivatives. The degree of quaternization increases with increasing EEDQ/chitosan ratio and is partly accompanied by N-ethoxycarbonylation. That side-product formation can be minimized by increasing betaine/EEDQ ratio.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 43, Issue 6, June 2007, Pages 2414–2421
نویسندگان
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