Quantitative Separation of NMR Signal Amplitude of Water in Wood on the Basis of T₂

Abstract:

As a kind of crude and green material, wood is essential to human life. Meanwhile, the amount of water played a vital role to almost all engineering properties of wood. Moisture affects dimensional stability, physical and mechanical properties, and susceptibility toward biological degradation. Consequently, it provides a theoretical basis for the reasonable drying model to explore the water assignment and content in timber. we present here the application of a nuclear magnetic resonance technique, which is used to quantitatively analyse water distribution in wood on the basis of T2. In this paper, we will analyse the water distribution in hardwood on the basis of T2. Refer to the scanning electron micrographs of the hardwood, we can speculate the relaxation time of the water in different cell lumens respectively. Moreover, it is even more important to calculate the organic proportion in wood by the corresponding amplitude of signal derived from the water in different cell lumens. This, compared with a scanning electron micrograph, has allowed us to produce a assumable distribution of water in wood, even the corresponding organic proportion in wood, which allows us to speculate physical and mechanical properties of wood. A mobile NMR probe has been used as a non-destructive and non-invasive tool for water content analysis on wood samples. In this paper, we will adopt NMR methods to explain. This, has opened up a way for the accurate determination of the moisture content of wood, even can be applied to the areas of food and so on. Keywords: Nuclear magnetic resonance; Water distribution in wood; T2; Scanning electron micrograph; Water content

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 552-557
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.552
• Online since: December 2011
• Authors: Da Yan Ma, Xi Ming Wang, Ming Hui Zhang, Xue Qi Li
• Keywords: Nuclear Magnetic Resonance, Scanning Electron Micrograph, T2, Water Content, Water Distribution in Wood

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