| To obtain high strength wood by impregnating modifier at low pressing pressure and low heating temperature is one of advanced wood modification methods. Urea formaldehyde resins are produced in large amounts and are widely used in wood industry depending on the properties. However, the viscosity of common Urea formaldehyde resins is too high to impregnating into the log. In this case, a modifier with low viscosity called urea formaldehyde performed polymer were synthesized (UFP). In the meanwhile the influence of inorganic rigid particles (nano-SiO2) on the properties of urea formaldehyde performed polymer, nano-SiO2/ (urea formaldehyde performed polymer) composites have been made. The effects of different contents of nano-SiO2 on the properties of nano-SiO2/UFP composites such as the dispersion of nano-SiO2 and wood bonding strength were discussed. The results indicated that the bonding strength of wood modified by nano-UFP increased greatly. |
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