NANOCELLULOSE OBTAINED MECHANICALLY BY DIFFERENT COLLOID GRINDING INTENSITIES

Autores

  • Marina Stygar Lopes Universidade Federal do Paraná http://orcid.org/0000-0003-0035-1612
  • Daniele Cristina Potulski Universidade Federal do Paraná
  • Lívia Cássia Viana Universidade Federal do Paraná
  • Mayara Elita Carneiro Universidade Federal do Paraná
  • Graciela Inês Bolzon de Muniz Universidade Federal do Paraná
  • Alan Sulato de Andrade Universidade Federal do Paraná

DOI:

https://doi.org/10.5380/rf.v50i1.58690

Palavras-chave:

cellulose, nanotechnology, nanostructured film, density, crystallinity.

Resumo

Recent advances in nanocellulose technology have enabled production of materials for various applications with attractive properties. The aim of this work was to analyze the nanofibrillated cellulose of Eucalyptus sp. obtained by different grinding intensities. Delignified Eucalyptus sp. kraftpulp was used to obtain the nanofibrillated cellulose in the mechanical grinding process, with 2, 10 and 20 passes. Images were captured by scanning and transmission electron microscopy to observe cellulose structures. For each mechanical treatment, three films were produced, which were used to evaluate the crystallinity index. Viscosity measurement evaluated the influence of mechanical treatment on nanofibrillated cellulose. Microscopic analysis showed that the mechanical process promoted fiber defibrillation, resulting in the exposure of microfibrils in all treatments evaluated. Differences were not verified in the conformation and dimensions of the structures for the different numbers of passes, and the nanofibrils presented average diameter of approximately 30 nm. The mechanical process to obtain the nanofibrillated cellulose reduced of the crystallinity index and the viscosity of the nanofibrillated cellulose compared to cellulose before processing. The average particle size declined with rising number of grinder passes.

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Publicado

20-12-2019

Como Citar

Stygar Lopes, M., Potulski, D. C., Cássia Viana, L., Elita Carneiro, M., Inês Bolzon de Muniz, G., & Sulato de Andrade, A. (2019). NANOCELLULOSE OBTAINED MECHANICALLY BY DIFFERENT COLLOID GRINDING INTENSITIES. FLORESTA, 50(1), 897–904. https://doi.org/10.5380/rf.v50i1.58690

Edição

v. 50 n. 1 (2020)

Seção

Artigos

Licença

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