Characterization, biodegradation and cytotoxicity of thermoplastic starch and ethylene-vinyl alcohol copolymer blends
Entity
UAM. Departamento de Biología MolecularPublisher
ElsevierDate
2022-09-08Citation
10.1016/j.carbpol.2022.120085
Carbohydrate Polymers 298 (2022): 120085
ISSN
0144-8617 (print); 1879-1344 (online)DOI
10.1016/j.carbpol.2022.120085Funded by
The authors want to thank the Spanish Ministry of Science and Innovation for financial support (project PID2019-104812GB-I00) and FUAM, Universidad Autonoma de Madrid, Spain (project n◦ 820053)Editor's Version
https://doi.org/10.1016/j.carbpol.2022.120085Subjects
Bacillus; Biodegradation; Cytotoxicity assay; Ethylene-vinyl alcohol (EVOH); Thermoplastic starch (TPS); Biología y Biomedicina / BiologíaRights
© 2022 The AuthorsAbstract
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 O–H 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
Files in this item
Google Scholar:Pérez Blanco, C.
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Huang-Lin, Elisa
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Abrusci Bernal, Concepción
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