Accessible Requires Authentication Published by De Gruyter February 21, 2017

Characterizing spatial distribution of the adsorbed water in wood cell wall of Ginkgo biloba L. by μ-FTIR and confocal Raman spectroscopy

Xin Guo, Yiqiang Wu and Ning Yan
From the journal Holzforschung


The adsorbed water influences significantly, the physical and mechanical properties of wood. In the present paper, the spatial distribution of adsorbed water in wood cell walls has been studied by μ-Fourier transform infrared (μ-FTIR) and confocal Raman spectroscopy. In situ μ-FTIR spectra were collected from three randomly selected areas in different cell wall regions, which were exposed to an environment with 0% to 96% relative humidity (RH). The water adsorption sites were easily detectable based on OH, C=O, and C-O group vibrations and it was shown that the adsorbed water concentration was not uniform in different regions. Confocal Raman spectroscopy images were collected from the cell corner (CC) and middle layer of the secondary wall (S2) and the non-uniformity of water distribution could also be confirmed by this approach. It was demonstrated that both μ-FTIR and confocal Raman spectroscopy provide valuable information about the spatial distribution of adsorbed water in morphologically distinct cell wall regions.


Research is financially supported by the Natural Science Foundations of China (Grant No. 31530009 and 31500475), China Postdoctoral Science Foundation (Grant No. 2014M562146 and 2016T90768), Research Foundation of Education Bureau of Hunan Province (Grant No. 15B256), Hunan Province Science and Technology Project (Grant No. 2015RS4046) and Hunan Provincial Technical Innovation Platform and Talent Program in Science and Technology (Grant No. 2016RS2010 and 2016TP1013).


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Received: 2016-9-16
Accepted: 2017-1-16
Published Online: 2017-2-21
Published in Print: 2017-5-1

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