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Effect of Operational Variables on Supercritical Foaming of Caffeic Acid-Loaded Poly(lactic acid)/Poly(butylene adipate-co-terephthalate) Blends for the Development of Sustainable Materials.
Rivera, Patricia; Torres, Alejandra; Romero, Julio; Alarcón, Álvaro; Martínez, Sara; Arrieta, Marina P; Rodríguez-Mercado, Francisco; Galotto, María José.
Afiliação
  • Rivera P; Packaging Innovation Center (LABEN), Technology Faculty, Center for the Development of Nanoscience and Nanotechnology CEDENNA, University of Santiago de Chile (USACH), Santiago 9170201, Chile.
  • Torres A; Laboratory of Membrane Separation Processes (LabProSeM), Department of Chemical Engineering, Engineering Faculty, University of Santiago de Chile, Santiago 9170201, Chile.
  • Romero J; Packaging Innovation Center (LABEN), Technology Faculty, Center for the Development of Nanoscience and Nanotechnology CEDENNA, University of Santiago de Chile (USACH), Santiago 9170201, Chile.
  • Alarcón Á; Laboratory of Membrane Separation Processes (LabProSeM), Department of Chemical Engineering, Engineering Faculty, University of Santiago de Chile, Santiago 9170201, Chile.
  • Martínez S; Packaging Innovation Center (LABEN), Technology Faculty, Center for the Development of Nanoscience and Nanotechnology CEDENNA, University of Santiago de Chile (USACH), Santiago 9170201, Chile.
  • Arrieta MP; Laboratory of Membrane Separation Processes (LabProSeM), Department of Chemical Engineering, Engineering Faculty, University of Santiago de Chile, Santiago 9170201, Chile.
  • Rodríguez-Mercado F; Packaging Innovation Center (LABEN), Technology Faculty, Center for the Development of Nanoscience and Nanotechnology CEDENNA, University of Santiago de Chile (USACH), Santiago 9170201, Chile.
  • Galotto MJ; Departamento de Ingeniería Química Industrial y del Medio Ambiente, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid (ETSII-UPM), Calle José Gutiérrez Abascal 2, 28006 Madrid, Spain.
Polymers (Basel) ; 16(7)2024 Mar 30.
Article em En | MEDLINE | ID: mdl-38611209
ABSTRACT
Expanded polystyrene will account for 5.3% of total global plastic production in 2021 and is widely used for food packaging due to its excellent moisture resistance and thermal insulation. However, some of these packages are often used only once before being discarded, generating large amounts of environmentally harmful plastic waste. A very attractive alternative to the conventional methods used for polymer processing is the use of supercritical carbon dioxide (scCO2) since it has mass-transfer properties adapted to the foam morphology, generating different path lengths for the diffusion of active compounds within its structure and can dissolve a wide range of organic molecules under supercritical conditions. The objective of this research was to evaluate the effect of operational variables on the process of caffeic acid (CA) impregnation and subsequent foaming of polylactic acid (PLA) as well as two PLA/poly(butylene-co-terephthalate-adipate) (PBAT) blends using scCO2. The results showed an increase in the degree of crystallinity of the CA-impregnated samples due to the nucleation effect of the active compound. On the other hand, SEM micrographs of both films and foams showed significant differences due to the presence of PBAT and its low miscibility with PLA. Finally, the results obtained in this work contribute to the knowledge of the important parameters to consider for the implementation of the impregnation and foaming process of PLA and PLA/PBAT blends with potential use in food packaging.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Polymers (Basel) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Chile País de publicação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Polymers (Basel) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Chile País de publicação: Suíça