Effectiveness of modified lignin on poly(butylene adipateco-terephthalate)/poly(lactic acid) mulch film performance
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2023
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Journal of Applied Polymer Science
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Resumo
In this work, the biodegradable poly(butylene adipate-co-terephthalate) (PBAT)/
poly(lactic acid) (PLA) blend (ECOVIO®) and lignin, a renewable and biodegradable natural polymer with high UV absorption and modified by gamma
radiation were used to produce agriculture mulch films. Lignin was gammairradiated at 30 and 60 kGy. The irradiated and non-irradiated lignin content of
2 wt% was incorporated into PBAT/PLA blend matrix using a twin-screw
extruder and extrusion blown film to prepare flexible films. PBAT/PLA/LIGNIN
films were characterized by Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), x-ray diffraction (XRD), field emission
scanning electron microscopy (FESEM), tensile tests, contact angle, and UV–Vis
analysis. FTIR spectra showed partial miscibility between PBAT/PLA and lignin,
being intensified in irradiated lignin compounds. The DSC and XRD results
confirmed that the degree of crystallinity of the blends was not significantly
influenced by lignin addition. FE-SEM images showed better dispersion and miscibility in PBAT/PLA/Irradiated lignin. Miscibility improvement provided by
irradiated lignin promoted better mechanical properties, mainly with lignin irradiated at 60 kGy. PBAT/PLA/LIGNIN films containing 2 wt% showed excellent
UV-barrier property and greater hydrophobicity. Summing up, incorporation of
low contents of irradiated lignin could be an interesting alternative to produce
biodegradable UV-blocking agriculture mulch films.
Como referenciar
BARROS, JANETTY J.P.; OLIVEIRA, RENE R.; LUNA, CARLOS B.B.; WELLEN, RENATE M.R.; MOURA, ESPERIDIANA A.B. Effectiveness of modified lignin on poly(butylene adipateco-terephthalate)/poly(lactic acid) mulch film performance. Journal of Applied Polymer Science, v. 140, n. 46, p. 1-12, 2023. DOI: 10.1002/app.54684. Disponível em: http://repositorio.ipen.br/handle/123456789/34249. Acesso em: 19 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.