Naslov
Active Bilayer PE/PCL Films for Food Packaging Modified with Zinc Oxide and Casein

Autori
Rešček, Ana ; Kratofil Krehula, Ljerka ; Katančić, Zvonimir ; Hrnjak-Murgić, Zlata

Izvornik
Croatica chemica acta (0011-1643) 88 (2015), 4; 461-473

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

Ključne riječi
active packaging; casein; polyethylene; polycaprolactone; zinc oxide

Sažetak
This paper studies the properties of active polymer food packaging bilayer polyethylene/polycaprolactone (PE/PCL) films. Such packaging material consist of primary PE layer coated with thin film of PCL coating modified with active component (zinc oxide or zincoxide/casein complex) with intention to extend the shelf life of food and to maintain the quality and health safety. The influence of additives as active components on barrier, mechanical, thermal and antimicrobial properties of such materials was studied. The results show that, in comparison to the neat PE and PE/PCL films, some of PE/PCL bilayer films with additives exhibit improved barrier properties i.e. decreased water vapour permeability. Higher thermal stability of modified PE/PCL material is obtained due to a modified mechanism of thermal degradation. Good mechanical properties have the samples where the additive nanoparticles are homogeneously dispersed in the polymer matrix. Addition of higher ZnO content contributes to the enhanced antibacterial activity of a material.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA