Pullulan-based nanocomposite films for functional food packaging: Exploiting lysozyme nanofibers as antibacterial and antioxidant reinforcing additives
authors Silva, NHCS; Vilela, C; Almeida, A; Marrucho, IM; Freire, CSR
nationality International
journal FOOD HYDROCOLLOIDS
author keywords Functional packaging; Lysozyme nanofibers; Pullulan nanocomposite films; Antibacterial activity; Antioxidant activity
keywords EGG-WHITE LYSOZYME; PEPTIDOGLYCAN O-ACETYLTRANSFERASE; STAPHYLOCOCCUS-AUREUS; AMYLOID FIBRILS; BIOMEDICAL APPLICATIONS; NATURAL ANTIOXIDANTS; FOODBORNE PATHOGENS; TRANSPARENT FILMS; RESISTANCE; CELLULOSE
abstract Homogeneous, glossy and transparent nanocomposite films composed of pullulan (PL) and lysozyme nanofibers (LNFs) were developed by simple solvent casting from aqueous suspensions. The incorporation of LNFs into the PL matrix maintained the filmogenic ability of PL and endowed the nanocomposite films with good mechanical properties (Young's modulus = 1.91-2.50 GPa) and several functionalities, confirming the potential of LNFs as bioactive reinforcing elements for nanocomposites. The set of pliable films exhibits thermal stability up to 225 degrees C and maximum antioxidant activity around 77% (DPPH scavenging activity) for the film with the highest LNFs content (15.0 wt%). The antibacterial activity of the ensuing nanocomposite films towards Staphylococcus aureus, viz. lysozyme-resistant bacteria, was assessed, and the data show augmented antibacterial effectiveness with increasing content of nanofibers. These promising results show the potential of PL/LNFs nanocomposites as eco-friendly edible films for active packaging. (C) 2017 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0268-005X
year published 2018
volume 77
beginning page 921
ending page 930
digital object identifier (doi) 10.1016/j.foodhyd.2017.11.039
web of science category Chemistry, Applied; Food Science & Technology
subject category Chemistry; Food Science & Technology
unique article identifier WOS:000424927700097
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journal analysis (jcr 2017):
journal impact factor 5.089
5 year journal impact factor 5.501
category normalized journal impact factor percentile 95.502
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