Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/41291
Título: | Effects of fermentation residues on the melt processability and thermomechanical degradation of PHBV produced from cheese whey using mixed microbial cultures |
Autor(es): | Hilliou, L. Teixeira, Paulo Francisco Machado, Diogo Silva Covas, J. A. Oliveira, Catarina S. S. Duque, Anouk F. Reis, Maria A. M. |
Palavras-chave: | Polyhydroxyalkanoate Mixed microbial cultures Fermentation residues Degradation Melt extrusion Filament |
Data: | 2016 |
Editora: | Elsevier |
Revista: | Polymer degradation and stability |
Resumo(s): | Two polyhydroxy(butyrate-co-valerate) (PHBV) produced from mixed microbial cultures (MMC) fed with fermented cheese whey (CW) and recovered with different down streaming routes, were processed into filaments by plasticating extrusion. The thermorheological characteristics were improved when fermentation residues were recovered together with the MMC PHBV polymer. Thermogravimetric analysis of the extruded filaments showed that MMC PHBV with 11% residues was less degraded than pure PHBV after the thermomechanical processing. Infrared spectroscopy indicated that residues rich in OH groups were volatilized during extrusion, thereby originating filaments that were less degraded than those produced with purified MMC PHBV. Residues had no impact on the semi crystalline properties of the filaments, but were responsible for their depressed mechanical properties, significant color deterioration upon processing and narrowed the processing operating window of MMC PHBV. |
Tipo: | Artigo |
Descrição: | "Available online 28 March 2016" |
URI: | https://hdl.handle.net/1822/41291 |
DOI: | 10.1016/j.polymdegradstab.2016.03.031 |
ISSN: | 0141-3910 |
Versão da editora: | www.elsevier.com/locate/polydegstab |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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poldegstab 2016 MMC PHBV process.pdf Acesso restrito! | 1,86 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons