Bio‐nanocomposites for food packaging applications: effect of cellulose nanofibers on morphological, mechanical, optical and barrier properties

The effect of the addition of various concentrations of cellulose nanofibers (CNF) on the thickness, solubility, morphology, mechanics, water vapor permeability and optical properties of biopolymers isolated from whey protein produced by the casting method was studied. The results show that the addi...

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Bibliographic Details
Published in:Polymer international 2018-04, Vol.67 (4), p.386-392
Main Authors: Carvalho, Raissa Alvarenga, Santos, Taline Amorim, de Azevedo, Viviane Machado, Felix, Pedro Henrique Campelo, Dias, Marali Vilela, Borges, Soraia Vilela
Format: Article
Language:English
Subjects:
Biopolymers
Cellulose
elastic modulus
Electron microscopy
Food packaging
Food packaging industry
Mechanical tests
Nanocomposites
Nanofibers
nanoparticles
Optical properties
Permeability
Scanning electron microscopy
SEM
Solubility
Thickness
Water vapor
Whey
Whey protein
whey protein isolate
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Summary:The effect of the addition of various concentrations of cellulose nanofibers (CNF) on the thickness, solubility, morphology, mechanics, water vapor permeability and optical properties of biopolymers isolated from whey protein produced by the casting method was studied. The results show that the addition of CNF did not cause significant variation in the thickness of the films and resulted in nanocomposites with lower solubility and water vapor permeability. Scanning electron microscopy analysis showed that the films obtained with up to 4% of CNF showed good dispersion of the nanofibers in the whey protein matrix. The results of mechanical tests showed that the nanofibers acted as reinforcing material resulting in more resistant and less flexible films. © 2017 Society of Chemical Industry Addition of cellulose nanofibers (CNF) to whey protein isolate (WPI) resulted in nanocomposite films with low solubility and water vapor permeability. Films with 2 or 4 wt% of CNF became more resistant and less flexible, showing good dispersion of the nanofibers.
ISSN:0959-8103
1097-0126
DOI:10.1002/pi.5518