Use of gamma-irradiation technology in the manufacture of biopolymer-based packaging films for shelf-stable foods

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dc.contributor.authorParra D.F.
dc.contributor.authorRodrigues J.A.F.R.
dc.contributor.authorLugao A.B.
dc.date.accessioned2024-03-13T01:43:59Z
dc.date.available2024-03-13T01:43:59Z
dc.date.issued2005
dc.description.abstractGamma irradiation is an alternative method for the manufacture of sterilized packaging with increased storage stability and microbiological safety. Biopolymer-based packaging films are a potential solution to many environmental problems that have emerged from the production and accumulation of significant amounts of synthetic polymeric waste. This work was undertaken to verify the effectiveness of low-dose gamma-irradiation in obtaining biopolymer-based packaging films for shelf-stable foods. PHB polyester poly(3-hydroxybutyrate) is an interesting biodegradable polymer that has been intensely investigated as cast and sheet films, with applications in the food industry and medicine. The films obtained are, however, typically brittle, and many scientists have attempted to reduce this brittleness by blending PHB with other polymers. In the present work, PHB was blended with PEG (polyethyleneglycol) to obtain films by the casting method that were then irradiated at a dose rate of 5.72 kGy/h with a 60Co source. Samples were melted at 200 °C and quenched to 0 °C in order to evaluate film crystallinity levels by differential scanning calorimetry (DSC). DSC analyses were performed with the samples (10 mg) under N2 atmosphere, heating from -50 to 200 °C (10 °C min-1), cooling from 200 to -50 °C (10 °C min-1); and heating from -50 to 200 °C (10 °C min-1). The thermal and mechanical resistances of the films after irradiation at low doses (5, 10, 20 kGy) are discussed. Water vapour transmission decreased with increasing irradiation dose, indicating that the films' performance as water vapour barrier had improved. Critical loss of the mechanical properties was observed at 40 kGy. © 2005 Elsevier B.V. All rights reserved.
dc.description.firstpage563
dc.description.issuenumber1-4
dc.description.lastpage566
dc.description.volume236
dc.identifier.doi10.1016/j.nimb.2005.04.041
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37872
dc.relation.ispartofNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
dc.rightsAcesso Restrito
dc.subject.otherlanguageBiodegradable polymers
dc.subject.otherlanguageDSC
dc.subject.otherlanguagePHB
dc.titleUse of gamma-irradiation technology in the manufacture of biopolymer-based packaging films for shelf-stable foods
dc.typeArtigo de evento
local.scopus.citations13
local.scopus.eid2-s2.0-21644443141
local.scopus.subjectBiodegradable polymers
local.scopus.subjectPHB
local.scopus.subjectshelf-stable foods
local.scopus.subjectWater vapors
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=21644443141&origin=inward
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