Affiliation:
1. Academic Unit of Materials Engineering Federal University of Campina Grande Campina Grande Brazil
2. Centro de Química e Meio Ambiente Instituto de Pesquisas Energéticas e Nucleares São Paulo Brazil
3. Centro de Ciências e Tecnologia de Materiais Instituto de Pesquisas Energéticas e Nucleares São Paulo Brazil
4. Materials Engineering Department Federal University of Paraíba João Pessoa Brazil
Abstract
AbstractIn 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 gamma‐irradiated 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.
Funder
Fundação de Amparo à Pesquisa do Estado de São Paulo
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Fundação de Apoio à Pesquisa do Estado da Paraíba
Subject
Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry
Cited by
3 articles.
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