Moisture penetration in oak during sinusoidal humidity fluctuations studied by NMR

Abstract

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Effects of zinc chloride–silicone oil treatment on wood dimensional stability, chemical components, thermal decomposition and its mechanism

“…Wood with low dimensional stability can shrink or swell when the EMC in the surrounding environment decreases or increases 13 . Wood moisture also changes with variations in environmental temperature and humidity, leading to defects 19 . Therefore, the dimensional stability of wood significantly affects the quality and application of wood product.…”

Sharp Front analysis of moisture buffering

“…• What is the true water distribution? There is some NMR imaging data on wood [16,17]. However little is known about water distributions in other buffer materials such as clay and lime plasters, often formulated with cellulosic fibres.…”

Reconstruction of historical temperature and relative humidity cycles within Knole House, Kent

“…The daily minimum (̌) and daily maximum (̂) temperatures in the Brown Gallery can be fitted with a Fourier series of the form Ť BG , T BG = A 0 + ∑ A j cos(jx) + B j sin(jx) N j=1 (5) where N is the number of terms in the Fourier series, enabling backwards extrapolation of these temperatures to 1605. To increase the accuracy of the model in periods 1772 -1877 and 1659 -1771 correction factors have been derived based on the daily average temperatures and monthly average temperatures from HadCET respectively.…”

“…Such cracking and delamination result in loss of paint, and a consequent loss of the aesthetic of the work, interpretation and appreciation by the viewer. The cyclic nature of RH has been shown and the effect of these cycles with varying fluctuation frequencies on the moisture penetration of oak wood examined [5]. Therefore, for collections in uncontrolled and controlled environments, both which have cyclic RH variations, it is important to investigate the cyclic behaviour that could be one cause of damage as a result of environmentally-induced fatigue.…”