A study of water exchange in wood by means of 2D NMR relaxation correlation and exchange

Julia Cox; Peter J. McDonald; Barry A. Gardiner

doi:10.1515/hf.2010.036

Published by De Gruyter January 14, 2010

A study of water exchange in wood by means of 2D NMR relaxation correlation and exchange

Julia Cox , Peter J. McDonald and Barry A. Gardiner

From the journal Holzforschung

https://doi.org/10.1515/hf.2010.036

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Abstract

Two-dimensional T₁-T₂¹H NMR relaxation correlation spectra and T₂-T₂ relaxation exchange spectra for samples of spruce wood across the full moisture content range from 0% to >100% are presented. The T₁-T₂ spectra unambiguously identify water in different environments within the wood that overlap in the corresponding and more traditional one-dimensional T₁ or T₂ experiment. The T₂-T₂ spectra unambiguously reveal the presence of water exchange between the lumen and cell wall above the fibre saturation point in sapwood. An estimate is made of the exchange rate: 1/30 to 1/3 ms^-1.

Keywords: exchange; nuclear magnetic resonance; relaxation; spruce; water

Corresponding author. Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK p.mcdonald@surrey.ac.uk

Received: 2009-4-3

Accepted: 2009-10-21

Published Online: 2010-01-14

Published in Print: 2010-02-01

A study of water exchange in wood by means of 2D NMR relaxation correlation and exchange

Abstract

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