On the Mechanism of Electron Beam Radiation-Induced Modification of Poly(lactic acid) for Applications in Biodegradable Food Packaging

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dc.contributor.authorGrosvenor, Eleanor C.
dc.contributor.authorHughes, Justin C.
dc.contributor.authorStanfield, Cade W.
dc.contributor.authorBlanchard, Robert L.
dc.contributor.authorFox, Andrea C.
dc.contributor.authorMihok, Olivia L.
dc.contributor.authorLee, Kristen
dc.contributor.authorBrodsky, Jonathan R.
dc.contributor.authorHoy, Ann
dc.contributor.authorUniyal, Ananya
dc.contributor.authorWhitaker, Sydney M.
dc.contributor.authorAcha, Chris
dc.contributor.authorGibson, Kalina
dc.contributor.authorDing, Lilly
dc.contributor.authorLewis, Catherine A.
dc.contributor.authorGonzález López, Lorelis
dc.contributor.authorWentz, Charlotte M.
dc.contributor.authorSita, Lawrence R.
dc.contributor.authorAl-Sheikhly, Mohamad
dc.date.accessioned2023-10-27T18:24:15Z
dc.date.available2023-10-27T18:24:15Z
dc.date.issued2022-02-10
dc.description.abstractPoly(lactic acid) (PLA) is a biodegradable polymer used for food packaging. The effects of electron beam radiation on the chemical and physical properties of amorphous PLA were studied. In this study, amorphous, racemic PLA was irradiated at doses of 5, 10, 15, and 20 kGy in the absence of oxygen. Utilizing electron paramagnetic resonance spectrometry, it was found that alkoxyl radicals are initially formed as a result of C-O-C bond scissions on the backbone of the PLA. The dominant radiation mechanism was determined to be H-abstraction by alkoxyl radicals to form C-centered radicals. The C-centered radicals undergo a subsequent peroxidation reaction with oxygen. The gel permeation chromatography (GPC) results indicate reduction in polymer molecular mass. The differential scanning calorimetry and X-ray diffraction results showed a subtle increase in crystallinity of the irradiated PLA. Water vapor transmission rates were unaffected by irradiation. In conclusion, these results support that irradiated PLA is a suitable material for applications in irradiation of food packaging, including food sterilization and biodegradation.
dc.description.urihttps://doi.org/10.3390/app12041819
dc.identifierhttps://doi.org/10.13016/dspace/lb16-hsp7
dc.identifier.citationGrosvenor, E.C.; Hughes, J.C.; Stanfield, C.W.; Blanchard, R.L.; Fox, A.C.; Mihok, O.L.; Lee, K.; Brodsky, J.R.; Hoy, A.; Uniyal, A.; et al. On the Mechanism of Electron Beam Radiation-Induced Modification of Poly(lactic acid) for Applications in Biodegradable Food Packaging. Appl. Sci. 2022, 12, 1819.
dc.identifier.urihttp://hdl.handle.net/1903/31161
dc.language.isoen_US
dc.publisherMDPI
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtMaterials Science & Engineeringen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.subjectelectron beam radiation
dc.subjectpoly(lactic acid)
dc.subjectalkoxyl free radical decay
dc.titleOn the Mechanism of Electron Beam Radiation-Induced Modification of Poly(lactic acid) for Applications in Biodegradable Food Packaging
dc.typeArticle
local.equitableAccessSubmissionNo

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