EFEITO DA MISTURA DE POLÍMEROS NO DESENVOLVIMENTO DE BIOPLÁSTICO A PARTIR DE RESÍDUOS DE PEIXE
DOI:
https://doi.org/10.20950/1678-2305.2019.45.4.518Palavras-chave:
blended films, fish gelatin, fish myofibrillar protein, technological propertiesResumo
A bioconversão de proteínas de subprodutos da indústria pesqueira em bioplástico possibilita a valorização do material biológico, reduzindo a produção de descarte e consequentemente, de impactos ambientais negativos do uso de embalagens sintéticas. O objetivo deste trabalho foi misturar gelatina e proteínas miofibrilares de pescada gó (Macrodon ancylodon) com intuito de desenvolver filmes biodegradáveis com propriedades tecnológicas aprimoradas. As propriedades dos filmes de mistura foram comparadas com as de filmes dos polímeros individuais. A espectroscopia de infravermelho com transformada de Fourier revelou boa compatilidade química entre gelatina e proteínas miofibrilares na formação do filme de mistura. A interação entre os polímeros foi conduzida por ligações de hidrogênio, formando película coesa e reforçada. Os filmes de mistura além de apresentarem os menores valores de permeabilidade ao vapor de água e solubilidade, também foram transparentes e, termicamente resistentes. Assim a mistura entre gelatina e proteínas miofibrilares possibilitou a formação de películas biodegradáveis com propriedades tecnológicas superiores í s produzidas com os polímeros separados.
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