Artigo de periodico

Kinetic changes in cellulose properties during defibrillation into microfibrillated cellulose and cellulose nanofibrils by ultra-refining. (2019)

• Authors:
  • Berto, Gabriela L
  • Arantes, Valdeir
• USP affiliated authors: ARANTES, VALDEIR - EEL ; BERTO, GABRIELA LEILA - EEL
• Unidade: EEL
• DOI: 10.1016/j.ijbiomac.2019.01.169
• Subjects: CINÉTICA QUÍMICA; MATERIAIS NANOESTRUTURADOS
• Agências de fomento:
  • Financiamento CAPES
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
    Processo FAPESP: 015/02862-5
• Language: Inglês
• Abstract: Defibrillation of cellulose fibers can lead to the isolation of microfibrillated cellulose (MFC) or cellulose nanofibrils (CNF) with intrinsic properties suitable for various applications. However, to what extent these properties are preserved, enhanced, gained or lowered during defibrillation and how they are related remains unclear. In this study, a kinetic study of the ultra-refining of bleached eucalyptus Kraft pulp (BEKP) in a disc ultra-refiner was performed and characterized in terms of physical-structural, morphological and thermal properties and their interactions and compromises. Defibrillation of BEKP to MFC substantially decreased the fiber diameter and in- creased viscosity, surface area and morphological heterogeneity. It also led to a remarkable increase in transpar- ency and essentially did not alter the thermostability but significantly degraded the crystallinity. A higher degree of defibrillation to isolate CNF led to fibers with smaller diameter and increased diameter uniformity but required a substantial amount of energy to only marginally increase viscosity and transparency. Crystallinity and thermo- stability were not altered, comparing with CMF. In conclusion, most changes occurred during the defibrillation of BEKP to CMF. Further defibrillation to CNFs with smaller diameters and better uniformity did not significantly re- flect on other important structural cellulose physical properties, despite the much higher energy consumption and degree of defibrillation.
• Imprenta:
  • Publisher place: Amsterdã
  • Date published: 2019
• Source:
  • Título do periódico: International journal of biological macromolecules
  • ISSN: 01418130
  • Volume/Número/Paginação/Ano: v.127, n.15, p.637-648, 2019

Informações sobre o DOI: 10.1016/j.ijbiomac.2019.01.169 (Fonte: oaDOI API)
• Este periódico é de assinatura
• Este artigo NÃO é de acesso aberto
  
• Cor do Acesso Aberto: closed

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How to cite

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• ABNT

  BERTO, Gabriela L e ARANTES, Valdeir. Kinetic changes in cellulose properties during defibrillation into microfibrillated cellulose and cellulose nanofibrils by ultra-refining. International journal of biological macromolecules, v. 127, n. 15, p. 637-648, 2019Tradução . . Disponível em: https://doi.org/10.1016/j.ijbiomac.2019.01.169. Acesso em: 02 maio 2024.

• APA

  Berto, G. L., & Arantes, V. (2019). Kinetic changes in cellulose properties during defibrillation into microfibrillated cellulose and cellulose nanofibrils by ultra-refining. International journal of biological macromolecules, 127( 15), 637-648. doi:10.1016/j.ijbiomac.2019.01.169

• NLM

  Berto GL, Arantes V. Kinetic changes in cellulose properties during defibrillation into microfibrillated cellulose and cellulose nanofibrils by ultra-refining. [Internet]. International journal of biological macromolecules. 2019 ;127( 15): 637-648.[citado 2024 maio 02 ] Available from: https://doi.org/10.1016/j.ijbiomac.2019.01.169

• Vancouver

  Berto GL, Arantes V. Kinetic changes in cellulose properties during defibrillation into microfibrillated cellulose and cellulose nanofibrils by ultra-refining. [Internet]. International journal of biological macromolecules. 2019 ;127( 15): 637-648.[citado 2024 maio 02 ] Available from: https://doi.org/10.1016/j.ijbiomac.2019.01.169

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