Cellulose gelation in NaOH solutions is due to cellulose crystallization

Ana Pereira; Hugo Duarte; Pegah Nosrati; Marta Gubitosi; Luigi Gentile; Anabela Romano; Bruno Medronho; Ulf Olsson

doi:10.1007/s10570-018-1794-3

Cellulose gelation in NaOH solutions is due to cellulose crystallization

Ana Pereira, Hugo Duarte, Pegah Nosrati, Marta Gubitosi, Luigi Gentile, Anabela Romano, Bruno Medronho, Ulf Olsson

Physical Chemistry

Research output: Contribution to journal › Article › peer-review

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.]

Original language	English
Pages (from-to)	3205-3210
Journal	Cellulose
Volume	25
Issue number	6
Early online date	2018 Apr 19
DOIs	https://doi.org/10.1007/s10570-018-1794-3
Publication status	Published - 2018 Jun

Subject classification (UKÄ)

Other Chemical Engineering
Physical Chemistry

Free keywords

Cellulose
Crystallites, WAXS
Gelation
NaOH

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10.1007/s10570-018-1794-3

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title = "Cellulose gelation in NaOH solutions is due to cellulose crystallization",

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.]",

keywords = "Cellulose, Crystallites, WAXS, Gelation, NaOH",

author = "Ana Pereira and Hugo Duarte and Pegah Nosrati and Marta Gubitosi and Luigi Gentile and Anabela Romano and Bruno Medronho and Ulf Olsson",

year = "2018",

month = jun,

doi = "10.1007/s10570-018-1794-3",

language = "English",

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journal = "Cellulose",

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TY - JOUR

T1 - Cellulose gelation in NaOH solutions is due to cellulose crystallization

AU - Pereira, Ana

AU - Duarte, Hugo

AU - Nosrati, Pegah

AU - Gubitosi, Marta

AU - Gentile, Luigi

AU - Romano, Anabela

AU - Medronho, Bruno

AU - Olsson, Ulf

PY - 2018/6

Y1 - 2018/6

N2 - 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.]

AB - 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.]

KW - Cellulose

KW - Crystallites, WAXS

KW - Gelation

KW - NaOH

U2 - 10.1007/s10570-018-1794-3

DO - 10.1007/s10570-018-1794-3

M3 - Article

AN - SCOPUS:85045763220

SN - 0969-0239

VL - 25

SP - 3205

EP - 3210

JO - Cellulose

JF - Cellulose

IS - 6

ER -

Cellulose gelation in NaOH solutions is due to cellulose crystallization

Abstract

Subject classification (UKÄ)

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