Journal
FOOD PACKAGING AND SHELF LIFE
Volume 12, Issue -, Pages 59-65Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fpsl.2017.02.006
Keywords
Kraft paper; Citrus wastes; Water vapor permeability; Oxygen permeability; Antioxidant activity
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Funding
- Sari University of Agricultural Sciences and Natural Resources, Iran
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Hydrophobic materials extracted from citrus wastes, both peel of mandarin fruits and leaf of mandarin trees were used to treat food-grade Kraft paper. The chemical compounds of the extracts were identified by gas chromatography-mass spectroscopy and infrared spectroscopy, and their antioxidant activities were determined using a free radical scavenger agent (2,2-diphenyl-1-picryl-hydrazyl-hydrate, DPPH). Water vapor permeability, air transmission rate, peroxide value, and microstructure of treated and original papers were also determined. The experimental results showed that: (i) most components of the peel or peel/leaf extracts were terpenes; (ii) free volume existed among cellulose macromolecule chains of the original paper, occupied by a part of extract materials, and another part of the extracts was formed a thin layer on the paper surfaces; and (iii) air and water barrier properties and antioxidant activity of the treated papers were improved, indicating that the extracts were efficient materials for food packaging applications. (C) 2017 Elsevier Ltd. All rights reserved.
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