OBTAINING MODIFIED WOOD WITH INCREASED STABILITY
UDC 674:812:02
Abstract
The results of research on the expediency of replacing phenol-formaldehyde resins (KFK-10) used to increase the form stability of natural and pressed soft hardwood with natural environmentally friendly modifiers are presented. Cardanol ZHSOK (cashew nut shell liquid) is considered as a stabilizing agent. It has been established that ZHSOK is an effective reactive modifier. Polymerization of cardanol should be carried out at a temperature of 150 °C. The maximum stabilizing effect occurs when the cardanol content in the wood is 9%. When alder was modified with cardanol, the wood samples turned out to be more resistant to moisture. Volumetric swelling is reduced by 40–70%, moisture absorption – by 21.4–50% in comparison with analogues modified by KFK-10. Compressive strength increased by 21.7–37.2% in comparison with KFK-10. The use of LCOCS will completely eliminate the toxicity of manufactured products.
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