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Multiscale characterization of arabinoxylan and β-glucan composite films

Authors :
Sujie Ji
Brigitte Bouchet
Luc Saulnier
Corinne Rondeau-Mouro
Ruifeng Ying
Cécile Barron
College of Light Industry of Science and Engineering
Nanjing Forestry University (NFU)
Unité de recherche sur les Biopolymères, Interactions Assemblages (BIA)
Institut National de la Recherche Agronomique (INRA)
Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE)
Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)
Technologie des équipements agroalimentaires (UR TERE)
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)
Regional Council of Pays de la Loire
Foundation of Nanjing Forestry University [GXL2013026]
Priority Academic Program Development of Jiangsu Higher Education Institutions, PAPD
Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Source :
Carbohydrate Polymers, Carbohydrate Polymers, Elsevier, 2015, 122, pp.248-254. ⟨10.1016/j.carbpol.2015.01.014⟩
Publication Year :
2014

Abstract

Composite films made with Arabinoxylans (AXs) (with high, middle and low level of substitution by arabinose) and (1 → 3)(1 → 4)-β- d -glucans (BGs) extracted from cereal cell walls have been prepared and analyzed using microscopy (SEM and LSCFM), DSC, mechanical tests and TD-NMR spectroscopy. The objectives were to correlate molecular and physico-chemical properties of films with mechanical and hydration properties of wheat cell walls. A phase separation phenomenon was observed for films made with highly substituted AXs and BGs at a ratio AX/BG of 60/40. This phase separation was correlated with lower dipolar interactions between polysaccharide chains and a decrease of ultimate strain and stress of films. Highly substituted AX and BG composite films exhibited very weak mechanical properties in agreement with weaker interactions between the polymer chains. This effect was supported by NMR results showing that interactions between AXs and BGs decreased with increased substitution of AXs in composite films. Lower dipolar interactions between polysaccharides favored the water mobility in relation with a higher specific surface area of polysaccharides in films but also higher distances between polysaccharide chains so larger nanopores in composite films made within highly substituted AXs. These multiscale characterizations agreed with the structural changes observed in wheat grain during its development.

Details

ISSN :
18791344 and 01448617
Volume :
122
Database :
OpenAIRE
Journal :
Carbohydrate polymers
Accession number :
edsair.doi.dedup.....0f974c50089da595c7691d22796c5e30
Full Text :
https://doi.org/10.1016/j.carbpol.2015.01.014⟩