Cellulose gelation in NaOH solutions is due to cellulose crystallization

Research output: Contribution to journalArticle

Abstract

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.]

Details

Authors
Organisations
External organisations
  • University of Florence
  • University of Algarve, Portugal
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Chemical Engineering
  • Physical Chemistry

Keywords

  • Cellulose, Crystallites, WAXS, Gelation, NaOH
Original languageEnglish
Pages (from-to)3205-3210
JournalCellulose
Volume25
Issue number6
Early online date2018 Apr 19
Publication statusPublished - 2018 Jun
Publication categoryResearch
Peer-reviewedYes