Effect of adding fatty acids and surfactant on the functional properties of biodegradable films prepared with myofibrillar proteins from acoupa weakfish (Cynoscion acoupa )

Gleice Vasconcelos Da Silva Pereira,Lúcia De Fátima Henriques Lourenço,Consuelo Lúcia Sousa De Lima,Maria Regina Sarkis Peixoto Joele,Glauce Vasconcelos Da Silva Pereira,Eleda Maria Paixão Xavier Neves

doi:10.1590/fst.03718

Gleice Vasconcelos Da Silva Pereira, Lúcia De Fátima Henriques Lourenço + Show 4 more

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https://doi.org/10.1590/fst.03718

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Abstract

Esta pesquisa teve como objetivo avaliar as propriedades de filmes biodegradaveis preparados com proteinas miofibrilares liofilizadas (LMP) de residuos de filetagem de peixe, acidos graxos (estearico, palmitico e caproico) e surfactante (SLS). Os filmes foram caracterizados para avaliar os efeitos da adicao desses componentes. A adicao de acidos graxos e SLS resultou em filmes mais flexiveis com maiores valores de alongamento em comparacao com o filme LMP. Os filmes preparados com 5% de acido estearico e 10% de SLS e com 10% de acido palmitico e 20% de SLS apresentaram maior resistencia a tracao em comparacao com o filme LMP. A solubilidade atingiu 100% nos filmes adicionados com 10% de acidos graxos com e sem SLS. O aumento da concentracao de acidos graxos e SLS levou a filmes menos transparentes. A analise por microscopia mostrou alteracoes na estrutura morfologica dos filmes adicionados aos acidos graxos e SLS, resultando em filmes esbranquicados quando maiores teores de SLS foram utilizados.

Highlights

The environmental impact of non-biodegradable plastic residues is a growing global concern
The use of byproducts to prepare biodegradable films with protective characteristics and/or fungicidal and bactericidal action may be a promising alternative in preservation systems, which is highly important to the food industry besides contributing to reducing environmental impacts by using byproducts from the fishing industry (Mali et al, 2006)
This behavior was observed by Oliveira et al (2012) in gelatin films when greater fatty acids and surfactant contents were added to the solution

Summary

Introduction

The environmental impact of non-biodegradable plastic residues is a growing global concern. The use of byproducts to prepare biodegradable films with protective characteristics and/or fungicidal and bactericidal action may be a promising alternative in preservation systems, which is highly important to the food industry besides contributing to reducing environmental impacts by using byproducts from the fishing industry (Mali et al, 2006). Natural biopolymers such as proteins and polysaccharides are promising raw materials as they are abundant, renewable, economical, and able to form a continuous matrix (Kaewprachu et al, 2016). Edible films and coatings have been considered technologies that may potentially reach such goals by providing microbiological safety and protecting foods from the influence of external factors (Pires et al, 2011)

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