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Evaluation of the Factors Affecting the Disintegration under a Composting Process of Poly(lactic acid)/Poly(3-hydroxybutyrate) (PLA/PHB) Blends.
Iglesias-Montes, Magdalena L; Soccio, Michelina; Luzi, Francesca; Puglia, Debora; Gazzano, Massimo; Lotti, Nadia; Manfredi, Liliana B; Cyras, Viviana P.
Afiliación
  • Iglesias-Montes ML; Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Facultad de Ingeniería, Universidad Nacional de Mar del Plata-Consejo de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata 7600, Argentina.
  • Soccio M; Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy.
  • Luzi F; Civil and Environmental Engineering Department, UdR INSTM, University of Perugia, 05100 Terni, Italy.
  • Puglia D; Civil and Environmental Engineering Department, UdR INSTM, University of Perugia, 05100 Terni, Italy.
  • Gazzano M; Institute of Organic Synthesis and Photoreactivity, National Research Council, 40129 Bologna, Italy.
  • Lotti N; Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy.
  • Manfredi LB; Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Facultad de Ingeniería, Universidad Nacional de Mar del Plata-Consejo de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata 7600, Argentina.
  • Cyras VP; Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Facultad de Ingeniería, Universidad Nacional de Mar del Plata-Consejo de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata 7600, Argentina.
Polymers (Basel) ; 13(18)2021 Sep 18.
Article en En | MEDLINE | ID: mdl-34578071
The overall migration behavior and the disintegration under composting conditions of films based on plasticized poly(lactic acid)/poly(3-hydroxybutyrate) (PLA-PHB) blends were studied, with the main aim of determining the feasibility of their application as biodegradable food packaging materials. The role of composition in the disintegration process was evaluated by monitoring the changes in physical and thermal properties that originated during the degradation process. PLA and PHB were blended in two weight ratios with 15 wt% of tributyrin, using a Haake mixer and then compression molded into ~150 µm films. We found that the migration level of all of the studied blends was below check intended meaning retained in non-polar simulants, while only plasticized blends could withstand the contact with polar solvents. The disintegration of all of the materials in compost at 58 °C was completed within 42 days; the plasticized PHB underwent the fastest degradation, taking only 14 days. The presence of the TB plasticizer speeded up the degradation process. Different degradation mechanisms were identified for PLA and PHB. To evaluate the annealing effect separately from bacteria degradation, the influence of temperature on materials in the absence of a compost environment was also studied. With the increasing time of degradation in compost, both melting temperature and maximum degradation temperature progressively decreased, while the crystallinity degree increased, indicating that the samples were definitely degrading and that the amorphous regions were preferentially eroded by bacteria.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Polymers (Basel) Año: 2021 Tipo del documento: Article País de afiliación: Argentina Pais de publicación: Suiza
Texto completo
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Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Polymers (Basel) Año: 2021 Tipo del documento: Article País de afiliación: Argentina Pais de publicación: Suiza