Multi-scale characterization of thermoplastic starch structure using Second Harmonic Generation imaging and NMR
| Autor: | Kamal Kansou, Frédéric Jamme, Agnès Rolland-Sabaté, Denis Lourdin, Veronica Nessi, Chloé Chevigny |
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| Přispěvatelé: | Unité de recherche sur les Biopolymères, Interactions Assemblages (BIA), Institut National de la Recherche Agronomique (INRA), Sécurité et Qualité des Produits d'Origine Végétale (SQPOV), Avignon Université (AU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Synchrotron SOLEIL |
| Rok vydání: | 2018 |
| Předmět: |
Thermoplastic
Materials science Polymers and Plastics Starch [SDV]Life Sciences [q-bio] 02 engineering and technology 010402 general chemistry Polysaccharide 01 natural sciences Crystallinity chemistry.chemical_compound [SDV.IDA]Life Sciences [q-bio]/Food engineering Carbohydrate Conformation Materials Chemistry [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Potato starch chemistry.chemical_classification Organic Chemistry Temperature food and beverages Recrystallization (metallurgy) 021001 nanoscience & nanotechnology Microstructure Magnetic Resonance Imaging 0104 chemical sciences chemistry Chemical engineering Second Harmonic Generation Microscopy Extrusion 0210 nano-technology |
| Zdroj: | Carbohydrate Polymers Carbohydrate Polymers, Elsevier, 2018, 194, pp.80-88. ⟨10.1016/j.carbpol.2018.04.030⟩ |
| ISSN: | 0144-8617 |
| DOI: | 10.1016/j.carbpol.2018.04.030 |
| Popis: | International audience; Starch granules can be extruded to obtain a thermoplastic material. Thermoplastic starch (TPS) usually requires a significant break down of the starch granular organization to form a continuous polysaccharide matrix. In this work, we extrude potato starch with and without a plasticizer and store samples at high humidity to generate recrystallization. A multi-scale investigation of the microstructure is performed by combining different techniques: WAXS and solid-state NMR to describe macromolecule organization and Second Harmonic Generation (SHG) imaging to provide spatial information. Finally, the ability of the material to swell and remain sound in water is assessed. Glycerol-plasticized samples swell the least despite many granules with native-like structure embedded in the starch matrix. Glycerol limits the fragmentation and melting of the granules and crystallites during extrusion but also reduces the proportion of starch molecules in constrained conformations, enabling the formation of a polymer network that can sustain the penetration of water. |
| Databáze: | OpenAIRE |
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