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A study of water exchange in wood by means of 2D NMR relaxation correlation and exchange
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Julia Cox
Published/Copyright:
January 14, 2010
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.
Received: 2009-4-3
Accepted: 2009-10-21
Published Online: 2010-01-14
Published Online: 2010-01-14
Published in Print: 2010-02-01
©2010 by Walter de Gruyter Berlin New York
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