Wood-water relationships, part III. Molecular sorption of water by sitka spruce wood
1937; IOP Publishing; Volume: 49; Issue: 3 Linguagem: Inglês
10.1088/0959-5309/49/3/305
ISSN2051-2171
Autores Tópico(s)Hydrology and Sediment Transport Processes
ResumoThe apparent molecular sorption of water by Sitka spruce flour is shown to remain constant at about 23 per cent of the dry weight of the wood over a period of 83 days when a sucrose solution is used as the indicator, but with sodium chloride solutions a gradual fall in the apparent sorption occurs which reaches a value of about 5 per cent after 14 days. This fall is here put down to the slow sorption of the salt and not to a low value of the true molecular sorption. It is also suggested that the low value of the molecular sorption derived by Stamm and Loughborough from considerations of the heat of wetting of wood is due to their assumption that molecular sorption is complete at about 30 per cent relative vapour pressure, when the capillary sorption commences.
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