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Nanofibre‐based bilayer biopolymer films: enhancement of antioxidant activity and potential for food packaging application
Author(s) -
Bharathi S.K.V.,
Leena M.M.,
Moses J.A.,
Anandharamakrishnan C.
Publication year - 2020
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.14492
Subject(s) - biopolymer , browning , bilayer , materials science , antioxidant , electrospinning , chitosan , chemical engineering , food packaging , polyethylene glycol , chemistry , composite material , polymer , organic chemistry , food science , membrane , biochemistry , engineering
Summary This study aimed to enhance the antioxidant property of biopolymer film without the incorporation of external agents. The active bilayer film with improved antioxidant activity has been developed by electrospinning zein, a prolamine of corn as nanofibre (average diameter of 286 nm) on solvent cast chitosan film. Zein nanofibres exhibited a slight increase in antioxidant activity as compared to solvent cast zein film. But, zein nanofibre coating on chitosan films significantly improved its antioxidant activity from 12.41% to 44.17%. The developed bilayer films were evaluated for its ability to prevent browning in minimally processed apple slices and compared with those of chitosan and zein films plasticised with polyethylene glycol. Higher surface to volume ratio and better affinity of zein nanofibres in the bilayer film helped enhance its anti‐browning ability. Thus, zein nanofibre‐coated chitosan bilayer films can be used as an effective anti‐browning packaging material for the packing of minimally processed fruits.