Mechanoradical formation and its effects on birch kraft pulp during the preparation of nanofibrillated cellulose with Masuko refining

I. Solala (Corresponding Author), A. Volperts, A. Andersone, T. Dizhhite, N. Moronova-Ulmane, A. Vehniäinen, Jaakko Pere, T. Vuorinen

Research output: Contribution to journalArticleScientificpeer-review

40 Citations (Scopus)

Abstract

Masuko refining of unbleached kraft birch pulp has been noted to result in more thorough fibrillation than the refining of its bleached counterpart. This result is observed through different fractionation behavior of once refined pulps and is further supported by different relative changes in pulp viscosity. The formation of mechanoradicals during refining is observed with electron paramagnetic resonance spectroscopy, and the role of lignin and hemicelluloses [quantified using kappa number determination and UV resonance Raman (UVRR) spectroscopy] in the progress of refining is discussed. Lignin, a known antioxidant, is capable of stabilizing radicals, which could potentially counteract recombination reactions between highly reactive cellulose radicals. On the other hand, lignin’s ability to promote fibrillation could also lie in its amorphous nature and not solely in its antioxidant characteristics. Furthermore, bleaching removes not only lignin but also hemicelluloses, which affects both the charge density and the structure of the fiber material, and this is another likely contributor to the easier fibrillation of lignin-containing pulps.
Original languageEnglish
Pages (from-to)477-483
Number of pages7
JournalHolzforschung
Volume66
Issue number4
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

Kraft pulp
Lignin
Cellulose
Refining
Pulp
Antioxidants
Unbleached pulp
Fractionation
Bleaching
Charge density
Paramagnetic resonance
Raman spectroscopy
Spectroscopy
Viscosity
Fibers
hemicellulose

Keywords

  • electron paramagnetic resonance
  • free radicals
  • hexenuronic acid
  • lignin
  • Masuko refining
  • mechanoradicals
  • nanofibrillated cellulose
  • UV resonance Raman spectroscopy

Cite this

Solala, I., Volperts, A., Andersone, A., Dizhhite, T., Moronova-Ulmane, N., Vehniäinen, A., ... Vuorinen, T. (2012). Mechanoradical formation and its effects on birch kraft pulp during the preparation of nanofibrillated cellulose with Masuko refining. Holzforschung, 66(4), 477-483. https://doi.org/10.1515/hf.2011.183
Solala, I. ; Volperts, A. ; Andersone, A. ; Dizhhite, T. ; Moronova-Ulmane, N. ; Vehniäinen, A. ; Pere, Jaakko ; Vuorinen, T. / Mechanoradical formation and its effects on birch kraft pulp during the preparation of nanofibrillated cellulose with Masuko refining. In: Holzforschung. 2012 ; Vol. 66, No. 4. pp. 477-483.
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abstract = "Masuko refining of unbleached kraft birch pulp has been noted to result in more thorough fibrillation than the refining of its bleached counterpart. This result is observed through different fractionation behavior of once refined pulps and is further supported by different relative changes in pulp viscosity. The formation of mechanoradicals during refining is observed with electron paramagnetic resonance spectroscopy, and the role of lignin and hemicelluloses [quantified using kappa number determination and UV resonance Raman (UVRR) spectroscopy] in the progress of refining is discussed. Lignin, a known antioxidant, is capable of stabilizing radicals, which could potentially counteract recombination reactions between highly reactive cellulose radicals. On the other hand, lignin’s ability to promote fibrillation could also lie in its amorphous nature and not solely in its antioxidant characteristics. Furthermore, bleaching removes not only lignin but also hemicelluloses, which affects both the charge density and the structure of the fiber material, and this is another likely contributor to the easier fibrillation of lignin-containing pulps.",
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Solala, I, Volperts, A, Andersone, A, Dizhhite, T, Moronova-Ulmane, N, Vehniäinen, A, Pere, J & Vuorinen, T 2012, 'Mechanoradical formation and its effects on birch kraft pulp during the preparation of nanofibrillated cellulose with Masuko refining', Holzforschung, vol. 66, no. 4, pp. 477-483. https://doi.org/10.1515/hf.2011.183

Mechanoradical formation and its effects on birch kraft pulp during the preparation of nanofibrillated cellulose with Masuko refining. / Solala, I. (Corresponding Author); Volperts, A.; Andersone, A.; Dizhhite, T.; Moronova-Ulmane, N.; Vehniäinen, A.; Pere, Jaakko; Vuorinen, T.

In: Holzforschung, Vol. 66, No. 4, 2012, p. 477-483.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Mechanoradical formation and its effects on birch kraft pulp during the preparation of nanofibrillated cellulose with Masuko refining

AU - Solala, I.

AU - Volperts, A.

AU - Andersone, A.

AU - Dizhhite, T.

AU - Moronova-Ulmane, N.

AU - Vehniäinen, A.

AU - Pere, Jaakko

AU - Vuorinen, T.

PY - 2012

Y1 - 2012

N2 - Masuko refining of unbleached kraft birch pulp has been noted to result in more thorough fibrillation than the refining of its bleached counterpart. This result is observed through different fractionation behavior of once refined pulps and is further supported by different relative changes in pulp viscosity. The formation of mechanoradicals during refining is observed with electron paramagnetic resonance spectroscopy, and the role of lignin and hemicelluloses [quantified using kappa number determination and UV resonance Raman (UVRR) spectroscopy] in the progress of refining is discussed. Lignin, a known antioxidant, is capable of stabilizing radicals, which could potentially counteract recombination reactions between highly reactive cellulose radicals. On the other hand, lignin’s ability to promote fibrillation could also lie in its amorphous nature and not solely in its antioxidant characteristics. Furthermore, bleaching removes not only lignin but also hemicelluloses, which affects both the charge density and the structure of the fiber material, and this is another likely contributor to the easier fibrillation of lignin-containing pulps.

AB - Masuko refining of unbleached kraft birch pulp has been noted to result in more thorough fibrillation than the refining of its bleached counterpart. This result is observed through different fractionation behavior of once refined pulps and is further supported by different relative changes in pulp viscosity. The formation of mechanoradicals during refining is observed with electron paramagnetic resonance spectroscopy, and the role of lignin and hemicelluloses [quantified using kappa number determination and UV resonance Raman (UVRR) spectroscopy] in the progress of refining is discussed. Lignin, a known antioxidant, is capable of stabilizing radicals, which could potentially counteract recombination reactions between highly reactive cellulose radicals. On the other hand, lignin’s ability to promote fibrillation could also lie in its amorphous nature and not solely in its antioxidant characteristics. Furthermore, bleaching removes not only lignin but also hemicelluloses, which affects both the charge density and the structure of the fiber material, and this is another likely contributor to the easier fibrillation of lignin-containing pulps.

KW - electron paramagnetic resonance

KW - free radicals

KW - hexenuronic acid

KW - lignin

KW - Masuko refining

KW - mechanoradicals

KW - nanofibrillated cellulose

KW - UV resonance Raman spectroscopy

U2 - 10.1515/hf.2011.183

DO - 10.1515/hf.2011.183

M3 - Article

VL - 66

SP - 477

EP - 483

JO - Holzforschung

JF - Holzforschung

SN - 0018-3830

IS - 4

ER -