Antioxidant and antimicrobial films based on brewers spent grain arabinoxylans, nanocellulose and feruloylated compounds for active packaging

authors	Moreirinha, C; Vilela, C; Silva, NHCS; Pinto, RJB; Almeida, A; Rocha, MAM; Coelho, E; Coimbra, MA; Silvestre, AJD; Freire, CSR
nationality	International
journal	FOOD HYDROCOLLOIDS
author keywords	Arabinoxylans; Brewers' spent grain; Nanofibrillated cellulose; Feruloylated compounds; Nanocomposite films; Active food packaging
keywords	FOOD; ANTIBACTERIAL; EXTRACTION; BEHAVIOR; WATER
abstract	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.
publisher	ELSEVIER SCI LTD
issn	0268-005X
isbn	1873-7137
year published	2020
volume	108
digital object identifier (doi)	10.1016/j.foodhyd.2020.105836
web of science category	Chemistry, Applied; Food Science & Technology
subject category	Chemistry; Food Science & Technology
unique article identifier	WOS:000565531600004