Dynamic water vapour sorption properties of wood treated with glutaraldehyde |
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| Authors: | Yanjun Xie Callum A S Hill Zefang Xiao Carsten Mai Holger Militz |
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| Institution: | 1.Centre for Timber Engineering, School of Engineering and the Built Environment,Edinburgh Napier University,Edinburgh,UK;2.Wood Biology and Wood Products, Burckhardt-Institute,Georg August University of G?ttingen,G?ttingen,Germany |
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| Abstract: | The dynamic water vapour sorption properties of Scots pine (Pinus sylvestris L.) wood samples were studied to investigate the modifying effects of glutaraldehyde. Pine sapwood was treated with solutions
of glutaraldehyde and a catalyst (magnesium chloride) to obtain weight per cent gains of 0.5, 8.6, 15.5, and 21.0%, respectively.
The sorption behaviour of untreated and treated wood was measured using a Dynamic Vapour Sorption apparatus. The results showed
considerable reduction in equilibrium moisture content of wood and the corresponding equilibrium time at each target relative
humidity (RH) due to glutaraldehyde treatment. The moisture adsorption and desorption rates of modified and unmodified wood
were generally faster in the low RH range (up to approximate 20%) than in the high range. Modification primarily reduced the
adsorption and desorption rates over the high RH range of 20–95%. Glutaraldehyde modification resulted in a reduction in sorption
hysteresis due to the loss of elasticity of cell walls. |
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