Journal
FOOD HYDROCOLLOIDS
Volume 108, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2020.105836
Keywords
Arabinoxylans; Brewers' spent grain; Nanofibrillated cellulose; Feruloylated compounds; Nanocomposite films; Active food packaging
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Funding
- Portuguese Foundation for Science and Technology/MCTES [UIDB/50011/2020, UIDP/50011/2020, UID/AMB/50017/2019, UID/QUI/00062/2019, UIDB/50006/2020]
- FEDER under the PT2020 Partnership Agreement
- Centro2020, through FEDER [CENTRO-01-0145-FEDER-000001, CENTRO-01-0145FEDER-031289]
- Centro2020, through PT2020
- national funds (OE), through FCT Fundacao para a Ciencia e a Tecnologia, I.P.
- FCT [CEECIND/00464/2017, CEECIND/00263/2018]
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In this study, brewers spent grain (BSG) arabinoxylans-based nanocomposite films were prepared by solvent casting of arabinoxylans (AX) suspensions containing different amounts of nanofibrillated cellulose (NFC, 5, 10, 25, 50 and 75% mass fraction). The obtained nanocomposite films were homogeneous and presented thermal stability up to 230 degrees C and good mechanical properties (Young's modulus up to 7.5 GPa). Additionally, the films with 50% NFC were loaded with ferulic acid or feruloylated arabinoxylo-oligosaccharides enriched fraction from BSG (75 mg per g of film). This combination enhanced the UV-Vis barrier properties and imparted additional functionalities to the films, namely (i) antioxidant activity up to 90% (DPPH scavenging activity), (ii) antibacterial activity against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria, and (iii) antifungal activity towards the polymorphic fungus Candida albicans. Therefore, these fully biobased nanocomposite films show potential for application as active food packaging systems.
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