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Starch-based nanocomposites with cellulose nanofibers obtained from chemical and mechanical treatments.
Tibolla, H; Czaikoski, A; Pelissari, F M; Menegalli, F C; Cunha, R L.
Afiliação
  • Tibolla H; Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP CEP 13083-862, Brazil.
  • Czaikoski A; Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP CEP 13083-862, Brazil.
  • Pelissari FM; Institute of Science and Technology, Food Engineering, University of Jequitinhonha and Mucuri, Diamantina, MG CEP 39100-000, Brazil.
  • Menegalli FC; Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP CEP 13083-862, Brazil.
  • Cunha RL; Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP CEP 13083-862, Brazil. Electronic address: rosiane@unicamp.br.
Int J Biol Macromol ; 161: 132-146, 2020 Oct 15.
Article em En | MEDLINE | ID: mdl-32522543
Cellulose nanofibers (CNFs) were isolated from unripe banana peel by acid hydrolysis, with different acid concentrations (0.1%, 1.0% and 10% v/v), followed by mechanical treatment with high-pressure homogenizer. Banana starch-based films added with CNFs (0.2% w/w) as a reinforcing agent were produced by the casting method. The rheological behavior of aqueous dispersions of CNFs (1.0% w/w) and their effects on the properties of nanocomposite films were investigated. All aqueous dispersions of CNFs showed gel-like behavior and, when incorporated to the films, CNFs improved their water barrier properties and mechanical resistance as demonstrated by the increase in tensile strength and Young's modulus. Moreover, CNFs were well dispersed in the composite matrix. CNFs prepared at higher concentration, followed by mechanical treatment (FNM1 and FNM10), formed films with low moisture (13.66%) and solubility in water (24.1%). Whereas, CNFs prepared at the lowest acid concentration without mechanical treatment (FN0.1) led to films with high elongation at break (30.6%) and good tensile strength (12.3 MPa). Regardless of the used CNFs, all the nanocomposites displayed lower UV/light transmission than control film. The nanocomposite has potential use in food packaging, since the use of CNFs can promote improvements on barrier, optical and mechanical properties. Cellulose nanofibers isolated from agro-industrial residues offer the potential to reinforce composites of biodegradable polymers, producing a value-added material.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Amido / Celulose / Nanocompostos / Nanofibras Idioma: En Revista: Int J Biol Macromol Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Amido / Celulose / Nanocompostos / Nanofibras Idioma: En Revista: Int J Biol Macromol Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda