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https://hdl.handle.net/2440/117476
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Type: | Journal article |
Title: | Rheological and structural properties of complex arabinoxylans from Plantago ovata seed mucilage under non-gelled conditions |
Author: | Yu, L. Yakubov, G. Martínez-Sanz, M. Gilbert, E. Stokes, J. |
Citation: | Carbohydrate Polymers, 2018; 193:179-188 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 0144-8617 1879-1344 |
Statement of Responsibility: | Long Yu, Gleb E.Yakubov, Marta Martínez-Sanz, Elliot P.Gilbert, Jason R.Stokes |
Abstract: | 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. |
Keywords: | Arabinoxylan Gels Hydrogen bonding Mucilage Plantago ovata Polymer conformation Rheology Small angle scattering |
Rights: | © 2018 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.carbpol.2018.03.096 |
Grant ID: | http://purl.org/au-research/grants/arc/DP150104147 http://purl.org/au-research/grants/arc/CE1101007 |
Published version: | http://dx.doi.org/10.1016/j.carbpol.2018.03.096 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 8 |
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