Polysaccharide-rich fraction of spent coffee grounds as promising biomaterial for films fabrication

Michelle J P A Batista; Antônio F Ávila; Adriana S Franca; Leandro S Oliveira

doi:10.1016/j.carbpol.2020.115851

Polysaccharide-rich fraction of spent coffee grounds as promising biomaterial for films fabrication

Carbohydr Polym. 2020 Apr 1:233:115851. doi: 10.1016/j.carbpol.2020.115851. Epub 2020 Jan 10.

Authors

Michelle J P A Batista¹, Antônio F Ávila², Adriana S Franca³, Leandro S Oliveira⁴

Affiliations

¹ Graduate Program in Food Science, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil.
² Department of Mechanical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil.
³ Graduate Program in Food Science, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil; Department of Mechanical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil.
⁴ Graduate Program in Food Science, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil; Department of Mechanical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil. Electronic address: leandro@demec.ufmg.br.

PMID: 32059902
DOI: 10.1016/j.carbpol.2020.115851

Abstract

Spent coffee grounds are wastes generated annually worldwide in significantly large amounts in the soluble coffee industry and in household and commercial beverage preparation. Although spent coffee grounds are rich in several classes of compounds, predominantly polysaccharides, profitable applications have not yet been effectively implemented for such wastes. Thus, it was the aim of this study to verify the feasibility of producing biopolymeric films from the polysaccharide-rich fraction of spent coffee grounds, obtained by alkaline hydrogen peroxide treatment of the coffee waste. Produced films were characterized for their physicochemical, barrier and mechanical properties and these properties were comparable to those of similar polysaccharides films from the literature.

Keywords: Biopolymeric film; Cellulose; Galactomannans; Spent coffee grounds.