کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7782575 1500565 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rheological and structural properties of complex arabinoxylans from Plantago ovata seed mucilage under non-gelled conditions
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Rheological and structural properties of complex arabinoxylans from Plantago ovata seed mucilage under non-gelled conditions
چکیده انگلیسی
Two gel-forming arabinoxylan (AX) fractions with very similar linkage composition and molecular weight distributions have been isolated from Plantago ovata seed mucilage. Both isolated fractions have distinct gel properties attributed to differences in intermolecular hydrogen bonding. This study probes the effect of hydrogen bonding on molecular interactions of P. ovata AX fractions under non-gelled conditions achieved using a mild hydrogen bonding inhibitor, 0.2 M KOH. Chain conformation, relaxation dynamics and interactions between AX molecules are investigated using a combination of rheological techniques and small angle X-ray and neutron scattering. The scattering data confirm similar molecular dimensions and chain rigidity for both fractions, while showing distinct patterns of molecular interactions which result in the formation of a self-associated polymer network. The relationship between molecular associations, chain relaxation time and entanglement behaviour of P. ovata AX solutions are corroborated though the analysis of flow profiles and small amplitude oscillatory shear rheology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 193, 1 August 2018, Pages 179-188
نویسندگان
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