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Effect of Glycerol and Sisal Nanofiber Content on the Tensile Properties of Corn Starch/Sisal Nanofiber Films.
de Vilhena, Mailson Batista; Paula, Marcos Vinícius da Silva; de Oliveira, Raul Costa; Estumano, Diego Cardoso; Viegas, Bruno Marques; Rodrigues, Emerson Cardoso; Macêdo, Emanuel Negrão; Souza, José Antônio da Silva; Cunha, Edinaldo José de Sousa.
Afiliação
  • de Vilhena MB; Graduate Program in Engineering of Natural Resources of the Amazon (PRODERNA), Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil.
  • Paula MVDS; School of Materials Engineering (FEMat), Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil.
  • de Oliveira RC; Institute of Exact and Naturals Sciences, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil.
  • Estumano DC; College of Application (CAp), Federal University of Roraima (UFRR), Boa Vista 69300-000, RR, Brazil.
  • Viegas BM; Simulation and Computational Biology Laboratory, High Performance Computing Center, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil.
  • Rodrigues EC; Faculty of Biotechnology, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil.
  • Macêdo EN; Faculty of Chemical Engineering, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil.
  • Souza JADS; Graduate Program in Engineering of Natural Resources of the Amazon (PRODERNA), Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil.
  • Cunha EJS; Faculty of Chemical Engineering, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil.
Polymers (Basel) ; 16(13)2024 Jul 08.
Article em En | MEDLINE | ID: mdl-39000802
ABSTRACT
Currently, petroleum-derived plastics are widely used despite the disadvantage of their long degradation time. Natural polymers, however, can be used as alternatives to overcome this obstacle, particularly cornstarch. The tensile properties of cornstarch films can be improved by adding plant-derived nanofibers. Sisal (Agave sisalana), a very common low-cost species in Brazil, can be used to obtain plant nanofibers. The goal of this study was to obtain sisal nanofibers using low concentrations of sulfuric acid to produce thermoplastic starch nanocomposite films. The films were produced by a casting technique using commercial corn starch, glycerol, and sisal nanofibers, accomplished by acid hydrolysis. The effects of glycerol and sisal nanofiber content on the tensile mechanical properties of the nanocomposites were investigated. Transmission electron microscopy findings demonstrated that the lowest concentration of sulfuric acid produced fibers with nanometric dimensions related to the concentrations used. X-ray diffraction revealed that the untreated fibers and fibers subjected to acid hydrolysis exhibited a crystallinity index of 61.06 and 84.44%, respectively. When the glycerol and nanofiber contents were 28 and 1%, respectively, the tensile stress and elongation were 8.02 MPa and 3.4%. In general, nanocomposites reinforced with sisal nanofibers showed lower tensile stress and higher elongation than matrices without nanofibers did. These results were attributed to the inefficient dispersion of the nanofibers in the polymer matrix. Our findings demonstrate the potential of corn starch nanocomposite films in the packaging industry.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Polymers (Basel) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Polymers (Basel) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça