From bulk banana peels to active materials: Slipping into bioplastic films with high UV-blocking and antioxidant properties

Autor(es)

Silva, Rodrigo D. ; Pacheco, Thalyta F. ; Santi, Amanda D. de ; Manarelli, Fabiana ; Bozzo, Breno R. ; Brienzo, Michel ; Otoni, Caio G. ; Azeredo, Henriette M. C.

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CLEANER PRODUCTION; v. 438, p. 16-pg., 2024-01-22.

Resumo

Bananas are among the most produced fruits globally, and their industry generates substantial amounts of peels, which are currently underutilized. Therefore, a simple process was proposed to fully convert banana peel powder (BPP) into bioplastic films using mild pretreatments. The influence of the following variables on film performance was investigated: the type of BPP (unblanched versus blanched), the pretreatment solvent (water - i.e., hydrothermal pretreatment, HTP - or sulfuric acid solution - i.e., dilute acid pretreatment, DAP), and the addition or not of carboxymethyl cellulose (CMC) in the films. The tensile properties of the bioplastics were primarily affected by the presence of CMC, with the films containing 20 wt% of this biopolymer achieving a tensile strength up to 16 MPa. The water vapor permeability was not influenced by any of the studied variables. In contrast, the water contact angle was primarily affected by the pretreatment employed, with all films prepared by HTP displaying a hydrophobic surface. The UV -shielding properties of the materials were mainly influenced by the type of BPP, and all films blocked at least 98% of UV radiation. The antioxidant activity was influenced primarily by the type of BPP, as blanching banana peels helped preserve it. These films are, therefore, promising materials for active food packaging applications, which could contribute to a transition toward a circular bioeconomy. (AU)

• Processo FAPESP: 17/22401-8 - Fruto-refinaria: processos de obtenção, métodos de caracterização e geração de produtos oriundos de resíduos da fruticultura
• Beneficiário: Nelson Ramos Stradiotto
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 20/11104-5 - Utilização integral de resíduos provenientes do processamento de frutas para produção de filmes biopoliméricos absorvedores de luz UV para aplicação em embalagens biodegradáveis
• Beneficiário: Rodrigo Duarte Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 21/05092-7 - Filmes biodegradáveis a partir de subprodutos integrais do processamento de frutas
• Beneficiário: Henriette Monteiro Cordeiro de Azeredo
• Modalidade de apoio: Auxílio à Pesquisa - Regular