کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10601815 | 982355 | 2013 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of cationic dextrin prepared by ultra high pressure (UHP)-assisted cationization reaction
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
Cationic dextrins were prepared through substitution reaction of dextrin with low and high addition levels of 2,3-epoxypropyltrimethylammonium chloride (ETMAC), respectively. Conventional cationization reactions were carried out for 5Â h under continued stirring. UHP-assisted cationization reactions were conducted at three pressurization levels of 100, 300 and 500Â MPa for a pressure holding time of 30Â min. Degree of substitution (DS) of UHP-assisted cationic dextrins ranged from 0.58 to 1.51, and in general, their DS values were enhanced with increasing pressure levels. FT-IR and 13C NMR spectra indicated the presence of CN bond, which provided clear evidence about incorporation of cationic moieties onto dextrin molecules. In flocculation test, UHP-assisted cationic dextrin revealed higher flocculating activity. Overall results suggested that UHP-assisted cationization reaction could modulate reactivity and flocculating activity of dextrin by controlling pressure levels and reaction mixture compositions, and cationic dextrins likely possessed a higher potential to replace synthetic polymer-based flocculants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 97, Issue 1, 14 August 2013, Pages 130-137
Journal: Carbohydrate Polymers - Volume 97, Issue 1, 14 August 2013, Pages 130-137
نویسندگان
Ahra Cho, Seung-Hyun Choi, Hyun-Wook Choi, Hyun-Seok Kim, Wooki Kim, Dae-Ok Kim, Byung-Yong Kim, Moo-Yeol Baik,