Naslov
Barrier properties of chitosan coated polyethylene

Autori
Kurek, Mia ; Ščetar, Mario ; Voilley, Andree ; Galić, Kata ; Debeaufort, Frederic

Izvornik
Journal of membrane science (0376-7388) 403/404 (2012); 162-168

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
chitosan; barrier; permeability; polyethylene coating; biopolymer; thermal properties

Sažetak
The transfer properties of chitosan coated polyethylene (PE) films were studied. The barrier properties of non coated PE were not affected by relative humidity changes. The presence of the hydrophilic chitosan layer acted as a water reservoir on the polyethylene film surface which significantly promoted its sensitivity to the water vapour. The water vapour permeability increased 1.85 times at a higher RH. Coated PE films showed more than two-order decrease in the oxygen permeability (PO2) and three-order-decrease in the carbon dioxide permeability (PCO2). When the chitosan coated PE surface was exposed to the water vapour, the PO2 and the PCO2 were significantly increased. However, the permeability of the chitosan self standing film depended on the solvent type, glycerol, permeate nature and the environmental humidity. The addition of ethanol during the film processing decreased PO2, PCO2 and Pair while glycerol had the opposite effect.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Prehrambena tehnologija

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