title: Development and characterisation of HPMC films containing PLA nanoparticles loaded with green tea extract for food packaging applications.
abstract: A novel active film material based on hydroxypropyl-methylcellulose (HPMC) containing poly(lactic acid) (PLA) nanoparticles (NPs) loaded with antioxidant (AO) green tea extract (GTE) was successfully developed. The PLA NPs were fabricated using an emulsification-solvent evaporation technique and the sizes were varied to enable a controlled release of the AO from the HPMC matrix. A statistical experimental design was used to optimise the synthesis of the NPs in order to obtain different sizes of nanoparticles and the loading of these into the HPMC matrix was also varied. The physico-chemical properties of the composite films were investigated and the release of the AO was confirmed by migration studies in 50% v/v ethanol/water food simulant. The AO capacity of the GTE released from the active films was studied using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical method and the results suggest that the material could potentially be used for extending the shelf-life of food products with high fat content.
authors.affiliation: Department of Analytical Chemistry, Aragon Institute of Engineering Research I3A, CPS-University of Zaragoza, Torres Quevedo Building, María de Luna St. 3, E-50018 Zaragoza, Spain. Electronic address: magdalenka.wrona@gmail.com.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Wrona
authors.affiliation: Institute for Sustainability and Innovation, Victoria University, PO Box 14428, Melbourne, 8001, Australia. Electronic address: marlene.cran@vu.edu.au.
authors.forename: Marlene J
authors.initials: MJ
authors.lastname: Cran
authors.affiliation: Department of Analytical Chemistry, Aragon Institute of Engineering Research I3A, CPS-University of Zaragoza, Torres Quevedo Building, María de Luna St. 3, E-50018 Zaragoza, Spain. Electronic address: cnerin@unizar.es.
authors.forename: Cristina
authors.initials: C
authors.lastname: Nerín
authors.affiliation: Institute for Sustainability and Innovation, Victoria University, PO Box 14428, Melbourne, 8001, Australia. Electronic address: stephen.bigger@vu.edu.au.
authors.forename: Stephen W
authors.initials: SW
authors.lastname: Bigger
mesh_terms: D000975:Antioxidants / Q000737:chemistry; D018857:Food Packaging; D065347:Hypromellose Derivatives / Q000737:chemistry*; D053758:Nanoparticles; D010936:Plant Extracts / Q000737:chemistry*; D013662:Tea / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D013662:Tea; D065347:Hypromellose Derivatives
keywords: Active packaging; Antioxidants; Green tea extract; HPMC; Nanoparticles; PLA