Enhanced pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO

S. Grönqvist (Corresponding Author), T. Kamppuri, T. Maloney, M. Vehviläinen, T. Liitiä, A. Suurnäkki

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

As a result of the constantly growing demand for textile fibres interest in utilising cellulose pulps for manufacturing regenerated cellulose fibres is growing. One promising water-based process for the manufacture of regenerated cellulosic products is the Biocelsol process based on an NaOH/ZnO solvent system. The drawback of the Biocelsol process is the need for pre-treatment of the pulp, i.e. long mechanical pre-treatment (up to 5 h) followed by a 2-3-h enzymatic hydrolysis utilising a rather high amount of cellulolytic enzymes. In this work more efficient conditions to carry out the pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO are presented. Based on the results, cellulase treatment, when carried out in an extruder, can be used to effectively open up and fibrillate the fibres without completely destroying the fibre structure. The molar mass of the pulp treated enzymatically in an extruder was 14 % lower as compared to the state-of-the-art-treated cellulose. As a consequence, the alkaline solutions prepared from the pulp treated enzymatically in an extruder had clearly lower dope viscosities regarding the cellulose content than the solutions prepared from the state-of-the-art-treated pulp. This enabled increasing the cellulose content in the dope up to 7 % (w/w) without increasing the dope viscosity.
Original languageEnglish
Pages (from-to)3981-3990
JournalCellulose
Volume22
Issue number6
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

Cellulose
Pulp
Dissolution
Extruders
Fibers
Viscosity
Textile fibers
Enzymatic hydrolysis
Cellulase
Molar mass
Enzymes
Water

Keywords

  • biocelsol
  • cellulose dissolution
  • dissolving pulp
  • enzymatic hydrolysis
  • porosity
  • pre-teatment
  • solute exclusion

Cite this

Grönqvist, S. ; Kamppuri, T. ; Maloney, T. ; Vehviläinen, M. ; Liitiä, T. ; Suurnäkki, A. / Enhanced pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO. In: Cellulose. 2015 ; Vol. 22, No. 6. pp. 3981-3990.
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abstract = "As a result of the constantly growing demand for textile fibres interest in utilising cellulose pulps for manufacturing regenerated cellulose fibres is growing. One promising water-based process for the manufacture of regenerated cellulosic products is the Biocelsol process based on an NaOH/ZnO solvent system. The drawback of the Biocelsol process is the need for pre-treatment of the pulp, i.e. long mechanical pre-treatment (up to 5 h) followed by a 2-3-h enzymatic hydrolysis utilising a rather high amount of cellulolytic enzymes. In this work more efficient conditions to carry out the pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO are presented. Based on the results, cellulase treatment, when carried out in an extruder, can be used to effectively open up and fibrillate the fibres without completely destroying the fibre structure. The molar mass of the pulp treated enzymatically in an extruder was 14 {\%} lower as compared to the state-of-the-art-treated cellulose. As a consequence, the alkaline solutions prepared from the pulp treated enzymatically in an extruder had clearly lower dope viscosities regarding the cellulose content than the solutions prepared from the state-of-the-art-treated pulp. This enabled increasing the cellulose content in the dope up to 7 {\%} (w/w) without increasing the dope viscosity.",
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Grönqvist, S, Kamppuri, T, Maloney, T, Vehviläinen, M, Liitiä, T & Suurnäkki, A 2015, 'Enhanced pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO', Cellulose, vol. 22, no. 6, pp. 3981-3990. https://doi.org/10.1007/s10570-015-0742-8

Enhanced pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO. / Grönqvist, S. (Corresponding Author); Kamppuri, T.; Maloney, T.; Vehviläinen, M.; Liitiä, T.; Suurnäkki, A.

In: Cellulose, Vol. 22, No. 6, 2015, p. 3981-3990.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Enhanced pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO

AU - Grönqvist, S.

AU - Kamppuri, T.

AU - Maloney, T.

AU - Vehviläinen, M.

AU - Liitiä, T.

AU - Suurnäkki, A.

PY - 2015

Y1 - 2015

N2 - As a result of the constantly growing demand for textile fibres interest in utilising cellulose pulps for manufacturing regenerated cellulose fibres is growing. One promising water-based process for the manufacture of regenerated cellulosic products is the Biocelsol process based on an NaOH/ZnO solvent system. The drawback of the Biocelsol process is the need for pre-treatment of the pulp, i.e. long mechanical pre-treatment (up to 5 h) followed by a 2-3-h enzymatic hydrolysis utilising a rather high amount of cellulolytic enzymes. In this work more efficient conditions to carry out the pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO are presented. Based on the results, cellulase treatment, when carried out in an extruder, can be used to effectively open up and fibrillate the fibres without completely destroying the fibre structure. The molar mass of the pulp treated enzymatically in an extruder was 14 % lower as compared to the state-of-the-art-treated cellulose. As a consequence, the alkaline solutions prepared from the pulp treated enzymatically in an extruder had clearly lower dope viscosities regarding the cellulose content than the solutions prepared from the state-of-the-art-treated pulp. This enabled increasing the cellulose content in the dope up to 7 % (w/w) without increasing the dope viscosity.

AB - As a result of the constantly growing demand for textile fibres interest in utilising cellulose pulps for manufacturing regenerated cellulose fibres is growing. One promising water-based process for the manufacture of regenerated cellulosic products is the Biocelsol process based on an NaOH/ZnO solvent system. The drawback of the Biocelsol process is the need for pre-treatment of the pulp, i.e. long mechanical pre-treatment (up to 5 h) followed by a 2-3-h enzymatic hydrolysis utilising a rather high amount of cellulolytic enzymes. In this work more efficient conditions to carry out the pre-treatment of cellulose pulp prior to dissolution into NaOH/ZnO are presented. Based on the results, cellulase treatment, when carried out in an extruder, can be used to effectively open up and fibrillate the fibres without completely destroying the fibre structure. The molar mass of the pulp treated enzymatically in an extruder was 14 % lower as compared to the state-of-the-art-treated cellulose. As a consequence, the alkaline solutions prepared from the pulp treated enzymatically in an extruder had clearly lower dope viscosities regarding the cellulose content than the solutions prepared from the state-of-the-art-treated pulp. This enabled increasing the cellulose content in the dope up to 7 % (w/w) without increasing the dope viscosity.

KW - biocelsol

KW - cellulose dissolution

KW - dissolving pulp

KW - enzymatic hydrolysis

KW - porosity

KW - pre-teatment

KW - solute exclusion

U2 - 10.1007/s10570-015-0742-8

DO - 10.1007/s10570-015-0742-8

M3 - Article

VL - 22

SP - 3981

EP - 3990

JO - Cellulose

JF - Cellulose

SN - 0969-0239

IS - 6

ER -