Your browser doesn't support javascript.
loading
Characterization, biodegradation and cytotoxicity of thermoplastic starch and ethylene-vinyl alcohol copolymer blends.
Pérez-Blanco, C; Huang-Lin, E; Abrusci, C.
Afiliação
  • Pérez-Blanco C; Departamento de Biología Molecular, Facultad de Ciencias, Universidad Autónoma de Madrid, UAM, Cantoblanco, 28049 Madrid, Spain.
  • Huang-Lin E; Departamento de Biología Molecular, Facultad de Ciencias, Universidad Autónoma de Madrid, UAM, Cantoblanco, 28049 Madrid, Spain.
  • Abrusci C; Departamento de Biología Molecular, Facultad de Ciencias, Universidad Autónoma de Madrid, UAM, Cantoblanco, 28049 Madrid, Spain; Centro de Biología Molecular Severo Ochoa, CSIC-UAM, Madrid, Spain. Electronic address: concepcion.abrusci@uam.es.
Carbohydr Polym ; 298: 120085, 2022 Dec 15.
Article em En | MEDLINE | ID: mdl-36241276
Ethylene-vinyl alcohol samples containing 27 and 38 % ethylene were used to prepare blends containing 30 and 50 % thermoplastic starch (TPS) plasticized with glycerol. Their biodegradability and cytotoxicity were studied by different techniques (XRD, DSC, TGA, CA, ATR-FTIR, SEM). TPS presence significantly affected copolymer behavior, as confirmed by the appearance of OH IR 1000-1170 cm-1 bands and overall reduction of EVOH crystallinity, melting point, thermal stability and hydrophobicity. Biodegradation was more efficient in the presence of TPS and resulted in the formation of a robust biofilm by a consortium of three bacteria. A lower ethylene content facilitated biodegradation, making the material easier to metabolize. The mineralization percentages obtained after a 40-day bioassay at 45 °C were up to 66 % (EVOH-27/TPS 50:50). In vitro cytotoxicity assay demonstrated no cytotoxicity before and after biodegradation. EVOH/TPS blends are presented as a potential environmentally friendly alternative to pure synthetic polymers.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Amido / Glicerol Idioma: En Revista: Carbohydr Polym Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Espanha País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Amido / Glicerol Idioma: En Revista: Carbohydr Polym Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Espanha País de publicação: Reino Unido