NC State
Fang, C.-H., Cloutier, A., Blanchet, P., and Koubaa, A. (2012). "Densification of wood veneers combined with oil-heat treatment. Part II: Hygroscopicity and mechanical properties," BioRes. 7(1), 925-935.


In an effort to achieve high mechanical performance and improved dimensional stability, densification combined with . was determined. OHT at 180, 200, and 220ºC for 1, 2, and 3 hours was applied to densified Aspen (Populus tremuloides) veneers. OHT was found to be an efficient treatment to reduce the hygroscopicity of densified aspen veneers, although OHT had a negative impact on Brinell hardness. However, due to the contribution of densification, the hardness of oil-heat treated veneers was still two to three times higher than that of non-densified veneers. Similar results were found for tensile strength. Bending strength increased slightly at low OHT temperature, and then decreased at high temperature. Bending strength of oil-heat treated densified veneer samples was higher than that of non-densified ones. No significant effect of OHT was found on tensile MOE, but bending MOE increased after OHT. Compared to OHT duration, OHT temperature had a larger impact on densified wood hygroscopicity and mechanical properties.
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