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In-Situ Quantitative and Multiscale Structural Study of Starch-Based Biomaterials Immersed in Water

Chevigny, Chloé and Chaunier, Laurent and Ferbus, Ruzica and Roblin, Pierre and Rondeau-Mouro, Corinne and Lourdin, Denis In-Situ Quantitative and Multiscale Structural Study of Starch-Based Biomaterials Immersed in Water. (2018) Biomacromolecules, 19 (3). 838-848. ISSN 1525-7797

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Official URL: https://doi.org/10.1021/acs.biomac.7b01635

Abstract

The behavior upon immersion in water of two types of starchy materials of biomedical relevance, amorphous potato starch and glycerol-plasticized potato starch, is analyzed in depth. Synchrotron X-ray scattering, specifically wide-angle X-ray scattering (WAXS), and magnetic resonance microimaging (MRμI) are used as very precise and nondestructive quantitative methods to monitor water transfers and structure changes in the samples, with refined spatial and kinetics results. The ingress of water in the cylinder-shaped samples can be inferred from both techniques, and from this, a diffusion mechanism is deduced for each sample type. Qualitatively, scattering and imaging give comparable results: plasticized samples are shown to behave close to a Fickian diffusion case, amorphous samples close to a case II. WAXS results also provide an in-depth knowledge of the crystalline structures associated to each step of the water ingress, and these are in turn correlated to water diffusion. To refine these observations, a recrystallized starch sample is also analyzed via WAXS. This study gives better insight into the structure of a material with a huge biomedical potential (as implants, for example), and for such applications, the behavior upon immersion in water is particularly relevant.

Item Type:Article
HAL Id:hal-01982667
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
French research institutions > Institut national de Recherche en Sciences et Technologies pour l'Environnement et l'Agriculture - IRSTEA (FRANCE)
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Deposited By: Loetitia MOYA
Deposited On:15 Jan 2019 18:03

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