Películas antibacterianas de poli(3-hidroxibutirato) (PHB)
In this work, films of poly(3-hydroxybutyrate) (PHB) with Irganox 1010 (0.3%, w/pPHB) as antioxidant, glycerol tributyrate (20%, w/pPHB) as plasticizer, and copper (II) sulfate pentahydrate (1 - 7.5%, w/pPHB) as antimicrobial were obtained by melt mixing and thermocompression. The incorporation of t...
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| Autores principales: | , , , , |
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| Formato: | Online |
| Lenguaje: | spa |
| Publicado: |
Facultad de Ciencias Aplicadas a la Industria
2023
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| Acceso en línea: | https://revistas.uncu.edu.ar/ojs3/index.php/revicap/article/view/7038 |
| Sumario: | In this work, films of poly(3-hydroxybutyrate) (PHB) with Irganox 1010 (0.3%, w/pPHB) as antioxidant, glycerol tributyrate (20%, w/pPHB) as plasticizer, and copper (II) sulfate pentahydrate (1 - 7.5%, w/pPHB) as antimicrobial were obtained by melt mixing and thermocompression. The incorporation of the antimicrobial increased the roughness of films surface. The materials containing Cu (II) sulfate presented lower ductility and mechanical resistance due to the crystals micrometric size. The incorporation of 0.5 % of the antimicrobial increased the WVP due to the high degree of hydration of the salt; however, higher concentrations (2.5 - 7.5 %) reduced this property due to an increased tortuosity. Although the materials presented antibacterial capacity against Staphylococcus aureus (Gram +) and Pseudomonas aeruginosa (Gram -), differences attributed to cell wall of the bacteria were observed. Thus, it was revealed that it is possible to obtain antibacterial PHB films, from the incorporation of a copper salt, that could be used for food, cosmetic or pharmaceutical packaging as well as for biomedical devices. |
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