Significance of xylan on the stability and water interactions of cellulosic nanofibrils

Tiia Maria Tenhunen, Maria Soledad Peresin, Paavo A. Penttilä, Jaakko Pere, Ritva Serimaa, Tekla Tammelin

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)

Abstract

In this paper, the significance of xylan on the behaviour of kraft birch pulp based nanofibrillated cellulose (CNF) is discussed. The influence of CNF xylan content on fibril morphology, charge and stability as well as on the film formation ability was investigated, and the features detected on nanoscale and on macroscale are compared. In addition to this, the ability of fibrils to uptake water molecules were investigated by bulk and surface sensitive methods which are dynamic water sorption analysis (DVS) and quartz crystal microbalance with dissipation monitoring (QCM-D) equipped with the humidity module, respectively. Surface xylan plays a significant role as an electrosteric stabilizer in dilute CNF dispersions when the surface forces are dominant whereas the removal of xylan drastically changes the CNF dispersion properties. The settling of the unstable CNF dispersions displays behaviour which is typical for hindered sedimentation. When considering thin nanoscale layers of CNF, nanofibrillated cellulosic materials with high content of surface xylan has somewhat higher ability to bind water molecules. However, it seems that in more concentrated CNF dispersions where the fibrillar network itself plays also a decisive role, especially with respect to film formation ability, the impact of xylan diminishes. Solvent cast macroscale CNF films are still enough dense to maintain good oxygen barrier performance at higher humid conditions although agglomeration tendency of fibrils is higher due to the excessive xylan removal. These findings are of high relevance when considering nanocellulosic materials, especially in the form of gels and films, as templates for high added value material solutions.

Original languageEnglish
Pages (from-to)157-166
Number of pages10
JournalReactive and Functional Polymers
Volume85
DOIs
Publication statusPublished - 1 Jan 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

Xylans
Water
Dispersions
display behavior
water
water uptake
agglomeration
cellulose
dissipation
humidity
Quartz Crystal Microbalance Techniques
gel
sorption
Betula
sedimentation
crystal
Molecules
quartz
Kraft pulp
Quartz crystal microbalances

Keywords

  • Cellulose nanofibrils
  • Electrosteric stability
  • Films
  • Oxygen barrier
  • Water interactions
  • Xylan

Cite this

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title = "Significance of xylan on the stability and water interactions of cellulosic nanofibrils",
abstract = "In this paper, the significance of xylan on the behaviour of kraft birch pulp based nanofibrillated cellulose (CNF) is discussed. The influence of CNF xylan content on fibril morphology, charge and stability as well as on the film formation ability was investigated, and the features detected on nanoscale and on macroscale are compared. In addition to this, the ability of fibrils to uptake water molecules were investigated by bulk and surface sensitive methods which are dynamic water sorption analysis (DVS) and quartz crystal microbalance with dissipation monitoring (QCM-D) equipped with the humidity module, respectively. Surface xylan plays a significant role as an electrosteric stabilizer in dilute CNF dispersions when the surface forces are dominant whereas the removal of xylan drastically changes the CNF dispersion properties. The settling of the unstable CNF dispersions displays behaviour which is typical for hindered sedimentation. When considering thin nanoscale layers of CNF, nanofibrillated cellulosic materials with high content of surface xylan has somewhat higher ability to bind water molecules. However, it seems that in more concentrated CNF dispersions where the fibrillar network itself plays also a decisive role, especially with respect to film formation ability, the impact of xylan diminishes. Solvent cast macroscale CNF films are still enough dense to maintain good oxygen barrier performance at higher humid conditions although agglomeration tendency of fibrils is higher due to the excessive xylan removal. These findings are of high relevance when considering nanocellulosic materials, especially in the form of gels and films, as templates for high added value material solutions.",
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Significance of xylan on the stability and water interactions of cellulosic nanofibrils. / Tenhunen, Tiia Maria; Peresin, Maria Soledad; Penttilä, Paavo A.; Pere, Jaakko; Serimaa, Ritva; Tammelin, Tekla.

In: Reactive and Functional Polymers, Vol. 85, 01.01.2014, p. 157-166.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Significance of xylan on the stability and water interactions of cellulosic nanofibrils

AU - Tenhunen, Tiia Maria

AU - Peresin, Maria Soledad

AU - Penttilä, Paavo A.

AU - Pere, Jaakko

AU - Serimaa, Ritva

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