کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1385643 982453 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ceric ammonium nitrate induced grafting of polyacrylamide onto carboxymethyl chitosan
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Ceric ammonium nitrate induced grafting of polyacrylamide onto carboxymethyl chitosan
چکیده انگلیسی

O-Carboxymethyl chitosan (CMCH) was prepared and characterized by FTIR spectroscopy and X-ray diffraction. Grafting of acrylamide (Am) onto CMCH using ceric ammonium nitrate (CAN) as an initiator was carried out under nitrogen atmosphere in aqueous solution. Evidence of grafting was confirmed by comparison of FTIR spectra of CMCH and the grafted copolymer as well as scanning electron micrography (SEM) and X-ray diffraction of the products. The effects of concentration of CAN, Am, reaction time and temperature on graft copolymerization were studied by determining the grafting percentage, grafting efficiency and percentage add-on. With other conditions kept constant, the optimum grafting conditions were obtained as follows: CMCH = 2 g, CAN = 0.2 M, and Am = 0.563 mol/L, reaction temperature = 40 °C, and reaction time = 4.5 h.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 67, Issue 3, 1 February 2007, Pages 427–435
نویسندگان
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