Optical, Mechanical, Antioxidant and Antimicrobial Properties of Starch/Polyvinyl Alcohol Biodegradable Film Incorporate
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ORIGINAL PAPER
Optical, Mechanical, Antioxidant and Antimicrobial Properties of Starch/Polyvinyl Alcohol Biodegradable Film Incorporated with Baccharis dracunculifolia Lyophilized Extract Maira Casagrande1,2 · Juliano Zanela2,3 · Américo Wagner Júnior2 · Fabio Yamashita3 · Cleverson Busso2 · Jéssica Wouk4 · Juliana Cristina Radaelli2 · Carlos Ricardo Maneck Malfatti1 Received: 26 May 2020 / Accepted: 30 September 2020 © Springer Nature B.V. 2020
Abstract Biodegradable active films incorporated with lyophilized extract of Baccharis dracunculifolia, source plant of Brazilian green propolis, were prepared by casting method. The extraction conditions of the bioactive compounds were optimized to generate a lyophilized product that was added to the starch: poly(vinyl alcohol) (1:1 w/w) film at concentrations of 0%, 1.0%, and 1.5% (w/w). The addition of B. dracunculifolia extracts promotes a reduction in the mechanical properties and an increase in the opacity of the active biodegradable films, directly related to the B. dracunculifolia contend added. For the migration tests in the films, using different food simulants solvents, the antioxidant activity (DPPH) and the TPC were performed, and ranged from 71.64 to 215.06 μmol Trolox and from 14.57 to 40.95 mg GAE (Gallic acid equivalent), per gram of film, respectively. The active biodegradable films were efficient against the pathogenic microorganisms Escherichia coli and Salmonella enterica subsp. enterica. The HPLC analysis showed that the major components in B. dracunculifolia extract were catechin, followed by ferulic acid. According to the characteristics presented, B. dracunculifolia lyophilized extract is a promising product for incorporation in food or pharmaceutical formulas, or as an active food packaging, due to its antioxidant and bactericidal activities.
* Maira Casagrande [email protected] 1
Departamento de Química, Universidade Estadual do Centro-Oeste, Guarapuava, PR 85040‑080, Brazil
2
Universidade Tecnológica Federal do Paraná, P O Box 157, Dois Vizinhos, PR 85660‑000, Brazil
3
Departmento de Ciência e Tecnologia de Alimentos, Centro de Ciências Agrárias, Universidade Estadual de Londrina, P O Box 10011, Londrina, PR 86057‑970, Brazil
4
Programa de Pós‑graduação Em Ciências Farmacêuticas, Universidade Estadual do Centro-Oeste, Guarapuava, PR 85040‑080, Brazil
13
Vol.:(0123456789)
Waste and Biomass Valorization
Graphic Abstract
Keywords Mechanical properties · Antimicrobial activity · Phenolic compounds · Antioxidant activity · Migration of antioxidant compounds
Statement of Novelty The Baccharis dracunculifolia is a native Brazilian plant that possesses antioxidant and antimicrobial properties. According to previous studies, a concentrated extract was made and incorporated in an active biodegradable film of cassava starch and polyvinyl alcohol (both biodegradable polymers). A film with antioxidant and antimicrobial properties was obtained to be used as a replacer for nonbiodegradable plastics and synthetic ant
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