Moisture transport in pine wood during one-sided heating studied by NMR

Abstract

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One- and Two-Dimensional NMR in Studying Wood–Water Interaction at Moisturizing Spruce. Anisotropy of Water Self-Diffusion

“…Wood is a natural fibrous material with porous structure which allows a transfer of water through the pores [1,2]. This water transport corresponds to the wettability of the wood material, which changes for different kinds of wood and various surface and inner microstructures [3,4].…”

“…Moisture of wood is the critical parameter affecting technological regimes of treatment of wood materials [2][3][4][5][6]. It is important to know how wetting the wood affects porous microstructure and how to find suitable methods for estimation of pore-water interactions and water transport during changing moisture of wood [3][4][5][6][7][8][9].…”

“…Interfaces 2018, 2, x FOR PEER REVIEW 9 of 14 dependence on G2 . Fitting linear part of echo-attenuation experimental curves by Equation 1 results in calculation of apparent diffusion coefficients D. With CR factor, the diffusion coefficients could be presented as a dependence on effective diffusion time Δ (Figure 6).…”

A simplified correction method for thermocouple disturbance errors in solids

“…Fig. 1 also describes several effects that the presence of moisture can have in a porous medium under a high heating rate, including endothermic evaporation, mass transfer, convective heat transport, and re-condensation [16,17]. While these phenomena actually occur in a continuous manner through the volume, they are represented simply here as fluxes imposed across discrete boundaries.…”

NMR and XRD quantification of bound and free water interaction of spruce wood fibers

“…The magnetic field B 0 presents a high and fixed intensity, whereas the magnetic field B 1 is rotational (Keeler, 2011). The hydrogen atom is the most sensible nucleus (Arends et al, 2018;Wang et al, 2018) due to its ½ spin and high intrinsic gyromagnetic moment of 42.6 MHz/T. In addition, this atom is very abundant, which leads to a well-defined resonance phenomenon.…”