Moisture-activated dynamics on crystallite surfaces in cellulose

Christopher J. Garvey, George P. Simon, Andrew K. Whittaker, Ian H. Parker

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The structural basis of the interdependence between moisture content and activation of cooperative dynamics in natural cellulose is explored using a solid state NMR experiment which is able to localize these motions to cellulose chains on the surface of the unitary crystallite. Making assumptions based on current knowledge of biosynthesis of cellulose and the dipolar line widths of 1 H spectra in solids, it is shown that the sorption of moisture causes the activation of cooperative motion of cellulose chains on the surface of the cellulose crystallite in a manner which is related to the moisture content. An important implication for these results is that densification of cellulose and associated changes in the water sorption isotherm, is possible by structural relaxation on the nano, or unitary crystallite scale. The result is also discussed in term of the evolving and modern picture of cellulose.

Original languageEnglish
Pages (from-to)521-527
Number of pages7
JournalColloid and Polymer Science
Volume297
Issue number4
DOIs
Publication statusPublished - 10 Apr 2019

Keywords

  • Cellulose
  • Microfibril
  • Solid state NMR
  • Structural relaxation

Cite this

Garvey, Christopher J. ; Simon, George P. ; Whittaker, Andrew K. ; Parker, Ian H. / Moisture-activated dynamics on crystallite surfaces in cellulose. In: Colloid and Polymer Science. 2019 ; Vol. 297, No. 4. pp. 521-527.
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Moisture-activated dynamics on crystallite surfaces in cellulose. / Garvey, Christopher J.; Simon, George P.; Whittaker, Andrew K.; Parker, Ian H.

In: Colloid and Polymer Science, Vol. 297, No. 4, 10.04.2019, p. 521-527.

Research output: Contribution to journalArticleResearchpeer-review

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