NC State
Lapčík, L., Lapčík, L., Kubíček, P., Lapčíková, B., Zbořil, R., and Nevěčná, T. (2014). "Study of penetration kinetics of sodium hydroxide aqueous solution into wood samples," BioRes. 9(1), 881-893.


The kinetics of unidirectional penetration of NaOH aqueous solution into rectangular samples of wood oriented parallel to a stern axis were studied. Scots pine (Pinus sylvestris), European larch (Larix decidua), blackthorn (Prunus spinosa), white willow (Salix alba), and horse-chestnut wood (Aesculus hippocastanum) were studied in this work. The time dependence of liquid incorporation was measured by the volumetric method as a change of total volume of coexisting liquid (NaOH/H2O) phase. The total thickness of the swollen surface layer d and mean value of the apparent diffusion coefficient of aqueous NaOH solution at 22 °C were determined.
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