کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7787659 | 1500627 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fine microstructure of processed chitosan nanofibril networks preserving directional packing and high molecular weight
ترجمه فارسی عنوان
ریز ساختار دقیق شبکه های نانوفیبریت کیتوزان پردازش شده جهت حفظ بسته بندی جهت دار و وزن مولکولی بالا
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Crystalline chitosan nanofibril networks were prepared, preserving the native structural packing and the polymer high molecular weight. The fine microstructure of the nanomaterial, obtained by mild hydrolysis of chitosan (CHI), was characterized by using synchrotron small- and wide-angle X-ray scattering (SAXS and WAXS), transmission electron microscopy (TEM) and electron diffraction. Hydrolysis of chitosan yielded a network of crystalline nanofibrils, containing both allomorphs of chitosan: hydrated and anhydrous. The comparison of WAXS data in transmission and reflection mode revealed the preferential orientation of the CHI crystals when subjected to mechanical compression constrains. The results are in agreement with the existence of a network nanostructure containing fiber-like crystals with the principal axis parallel to the polymer chain axis. The evolution of the CHI allomorphic composition with temperature was studied to further elucidate the mechanism of structural transitions occurring during CHI nanofibril network processing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 131, 20 October 2015, Pages 1-8
Journal: Carbohydrate Polymers - Volume 131, 20 October 2015, Pages 1-8
نویسندگان
Anayancy Osorio-Madrazo, Laurent David, Carlos Peniche-Covas, Cyrille Rochas, Jean-Luc Putaux, Stéphane Trombotto, Pierre Alcouffe, Alain Domard,