Evaluation of release mechanism of catechin from chitosan-polyvinyl alcohol film by exposure to gamma irradiation

Moslem Sabaghi; Yahya Maghsoudlou; Mahboobeh Kashiri; Alireza Shakeri

doi:10.1016/j.carbpol.2019.115589

Evaluation of release mechanism of catechin from chitosan-polyvinyl alcohol film by exposure to gamma irradiation

Carbohydr Polym. 2020 Feb 15:230:115589. doi: 10.1016/j.carbpol.2019.115589. Epub 2019 Nov 8.

Authors

Moslem Sabaghi¹, Yahya Maghsoudlou², Mahboobeh Kashiri², Alireza Shakeri³

Affiliations

¹ Department of Food Science and Technology, Gorgan University of Agricultural and Natural Resources, Gorgan, Iran. Electronic address: m_sabaghi2@yahoo.co.uk.
² Department of Food Science and Technology, Gorgan University of Agricultural and Natural Resources, Gorgan, Iran.
³ School of Chemistry, College of Science, University of Tehran, Iran.

PMID: 31887865
DOI: 10.1016/j.carbpol.2019.115589

Abstract

This study was conducted to investigate the application of gamma irradiation as a means to control the release rate of catechin from polymer matrix. First, chitosan and polyvinyl alcohol (1:3) were mixed and later chitosan nanoparticles containing catechin were added to the mixture and coated on polylactic acid surface and then films were irradiated at 0, 40 and 60 kGy doses of gamma-ray. Irradiation lowered the water solubility value of the films, furthermore 60 kGy dose reduced the water vapor permeability and tensile strength without significant effect on elongation at break of films. Results of release test indicated that gamma-ray decreased release rate of catechin from polymer matrix and generally release in high-fat simulant was about 2.5 times slower than low-fat simulant. This study was undertaken to design a packaging material with controlled release ability of antioxidant compound over time for further application in oxidation-sensitive foods.

Keywords: Active film; Catechin; Controlled release; Gamma irradiation; Nanoparticles.