Biodegradation of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) in simulated sublittoral marine environment, as affected by reinforcing and antimicrobial agents
[EN] Biodegradation of bioplastics in marine ecosystems is affected by biotic and abiotic factors related to the marine zone and the material composition. In this study, the biodegradation and disintegration behavior of PHBV films containing or not containing catechin and cellulose fibers was studie...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/232199 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/232199 |
| Access Level: | acceso embargado |
| Palabra clave: | Polyhydroxyalkanoates Catechin Cellulose fibers Marine biodegradation Disintegration 16S rRNA |
| Sumario: | [EN] Biodegradation of bioplastics in marine ecosystems is affected by biotic and abiotic factors related to the marine zone and the material composition. In this study, the biodegradation and disintegration behavior of PHBV films containing or not containing catechin and cellulose fibers was studied in a simulated Sublittoral zone at laboratory scale. The films were produced by melt blending and compression molding. Biodegradation rate was monitored through the respirometric method, according to the standard ISO 19,679:2020. Disintegration rate (mass loss) of the samples was also analyzed at different exposure times, while the changes in microstructure and thermal behavior of the residual film were characterized. Likewise, the influence of the antimicrobial (catechin) on the bacterial biofilm and taxonomic profiles after 200 exposure days was studied by DNA extraction and the analysis by Amplicon Sequencing. Cellulose fibers slightly accelerated the films' biodegradation by promoting bulk hydrolysis in the matrix due to their hydrophilic nature. In contrast, Catechin delayed the biodegradation and disintegration of PHBV films, which was attributed to its crosslinking effect in the polymer amorphous phase and its influence on the biofilm bacterial population, which could reduce the predominance of enzyme-producing bacteria responsible for film depolymerization. |
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