Effect of gamma irradiation on physicochemical properties of commercial poly(lactic acid) clamshell for food packaging

Tomás J. Madera-Santana, R. Meléndrez, Gerardo González-García, Patricia Quintana-Owen, Suresh D. Pillai

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

40 Citas (Scopus)

Resumen

© 2016 Elsevier Ltd. Poly(lactic acid) (PLA) is a well-known biodegradable polymer with strong potential application in food packaging industry. In this paper, samples of PLA clamshell for tomatoes packaging were exposed with 60CO γ-ray's source (1.33 MeV) at different dose levels (0, 10, 60, 150, 300, and 600 kGy), at room temperature and in presence of air. The physicochemical properties of neat PLA and sample exposed to gamma irradiation were investigated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and tensile measurements. Results show as the dose increases, the molecular weight (Mw), melting temperature (Tm), tensile strength and elongation at break decreased. However, the tensile modulus increased with increasing doses. The surface of PLA clamshells was degraded (scratches and minor cracks) when samples were exposed to doses greater than 60 kGy.
Idioma originalInglés estadounidense
Páginas (desde-hasta)6-13
Número de páginas8
PublicaciónRadiation Physics and Chemistry
DOI
EstadoPublicada - 1 jun 2016

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