Abstract:
The growing demand for increased shelf-hfe of food and the need for protection
against foodbome diseases, fiiel the development of new food packaging materials.
Silver-nanoparticle (AgNp) impregnated packaging materials are promising
candidates for active food packaging. These active packaging materials are capable of
extending the shelf-life of foods and reducing the risk of pathogens.
The current research work is focused on the development of AgNp incorporated
coating for polymer-based food packaging. AgNp dispersed in polyvinyl alcohol
solution was prepared by in situ reduction method, in which silver nitrate and
polyvinyl alcohol (PVA) acted as precursor and capping agent respectively. Presence
of silver nanoparticles in the solution was confirmed by photoluminescence
spectroscopy and UV-Vis spectroscopy. In order to reduce coating solubility PVA
solution was cross-linked. The compatibility of the coating with the substrate was
enhanced by plasma treatments. Contact angle measurements were employed to
monitor the wettability changes. The solubility of the coating was examined by
gravimetric methods. The effects of cross-linked temperature and cross-linked agents
on solubility were studied. The presence of silver nanoparticles in the coating was
confirmed by surface plasmon resonance and electron micrographs. The modified
Kirby-Bauer (disk diffusion) method was employed to measure the anti-bacterial
effect of the coating.
Citation:
Samarasekara, A.M.P.B., Amarasinghe, D.A.S., Madhushan, W.K.P. & Chathuranga, S.N. (2019). Deve
[Abstract]. In V. Sivahar & H.S. Sitinamaluwa (Eds.), Dreams to reality through innovative materials (p. 5). Department of Materials Science and Engineering, University of Moratuwa.
lopment of nano silver impregnated food packaging materials