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Cellulose gelation in NaOH solutions is due to cellulose crystallization

Author:
  • Ana Pereira
  • Hugo Duarte
  • Pegah Nosrati
  • Marta Gubitosi
  • Luigi Gentile
  • Anabela Romano
  • Bruno Medronho
  • Ulf Olsson
Publishing year: 2018-06
Language: English
Pages: 3205-3210
Publication/Series: Cellulose
Volume: 25
Issue: 6
Document type: Journal article
Publisher: Springer

Abstract english

Abstract: Cellulose gelation in 2 M NaOH aqueous solution was followed by time resolved turbidity and rheology measurements. The kinetics of gelation is observed to change from several hours down to few seconds when the temperature is increased from 25 to 30 °C. The increase of turbidity upon gelation demonstrates the formation of larger cellulose aggregates, while wide angle X-ray scattering data confirms the gradual formation of crystalline domains. This suggests that the gelation can be understood as cellulose precipitation/crystallization where an effectively cross linked network and gelation results from that cellulose chains may participate in more than one crystallite. Graphical Abstract: The gelation of cellulose solutions is due to crystallization and precipitation of cellulose.[Figure not available: see fulltext.]

Keywords

  • Other Chemical Engineering
  • Physical Chemistry
  • Cellulose
  • Crystallites, WAXS
  • Gelation
  • NaOH

Other

Published
  • ISSN: 0969-0239
Luigi Gentile
E-mail: luigi [dot] gentile [at] fkem1 [dot] lu [dot] se

Researcher

MEMEG

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Physical Chemistry

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Research group

Microbial Ecology

Projects

MICCS