Research on the Application of Cashew Phenols and Their Derivatives in Wood Reinforcement Modification
Fast growing wood has a short rotation period,but its texture is soft,the material is loose,the density is small,and it has permeability.Through chemical impregnation,artificial resin is impregnated into the interior of the wood to improve its water resistance,compressive strength,and other properties.This study synthesized unsaturated resin(UPR)using cashew phenol and cashew phenol glycidyl ether as the main raw materials,and used it for impregnation reinforcement modification of poplar and fir.The average density of poplar increased from 0.48 g/cm3 to 0.83 g/cm3,the compressive strength increased from 57.7 MPa to 92 MPa,and the water absorption rate decreased from 105.7％to 14.4％;The average density of Chinese fir increased from 0.33g/cm3 to 1.00 g/cm3,the compressive strength increased from 29.8 MPa to 76.9 MPa,and the water absorption rate decreased from 167.3％to 5.7％.The chemical structure was confirmed by FTIR spectroscopy,TG testing shows that unsaturated resins improve the thermal stability of wood to a certain extent.
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维普
