Abstract
The purpose of this study was to isolate arabinoxylans (AX) from wheat bran in order to further investigate the impact of their composition and structure on several physico-chemical properties used for food packaging films. Three hemicellulose fractions were alkali-extracted from destarched wheat bran and fractionated according to their solubility. Moreover, AX were further purified by elimination of β-glucans. The three AX fractions displayed a wide range of Ara/Xyl ratios varying from 0.2 to 1.3, contained various patterns of arabinose substitutions and different molar mass (152000–218000Da). The crystalline morphology, the beta transitions and water sorption properties of AX-based films were well correlated with the Ara/Xyl ratios of xylans. When arabinose content decreased, the films were more crystalline and the beta transitions decreased as well as the water uptake at high relative humidity. The local chain motion decreased in the amorphous parts for highly substituted xylans. Furthermore, the presence of co-extracted β-glucans modified the properties of the AX-films.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
