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Cellulose gelation in NaOH solutions is due to cellulose crystallization

Pereira, Ana ; Duarte, Hugo ; Nosrati, Pegah ; Gubitosi, Marta LU ; Gentile, Luigi LU ; Romano, Anabela ; Medronho, Bruno LU and Olsson, Ulf LU (2018) In Cellulose 25(6). p.3205-3210
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... (More)

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.]

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cellulose, Crystallites, WAXS, Gelation, NaOH
in
Cellulose
volume
25
issue
6
pages
3205 - 3210
publisher
Springer
external identifiers
  • scopus:85045763220
ISSN
0969-0239
DOI
10.1007/s10570-018-1794-3
language
English
LU publication?
yes
id
4b685837-8fb5-456a-82cd-ebd1fba42233
date added to LUP
2018-05-23 10:24:35
date last changed
2019-12-10 07:32:01
@article{4b685837-8fb5-456a-82cd-ebd1fba42233,
  abstract     = {<p>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.]</p>},
  author       = {Pereira, Ana and Duarte, Hugo and Nosrati, Pegah and Gubitosi, Marta and Gentile, Luigi and Romano, Anabela and Medronho, Bruno and Olsson, Ulf},
  issn         = {0969-0239},
  language     = {eng},
  number       = {6},
  pages        = {3205--3210},
  publisher    = {Springer},
  series       = {Cellulose},
  title        = {Cellulose gelation in NaOH solutions is due to cellulose crystallization},
  url          = {http://dx.doi.org/10.1007/s10570-018-1794-3},
  doi          = {10.1007/s10570-018-1794-3},
  volume       = {25},
  year         = {2018},
}