Method for preparing functional wood by resin impregnation pretreatment of wood

Abstract

The invention discloses a method for preparing a functional wood by resin impregnation pretreatment of a wood, and belongs to the technical field of wood modification. The method concretely includes the following four steps: pretreatment of the wood by using succinic anhydride, drying treatment, impregnation of the succinic anhydride pretreated wood by using melamine modified urea-formaldehyde resin, and vacuum drying treatment. A wood sample with the water content of 20% or below is pretreated by using succinic anhydride, and the pretreated wood is dried to obtain the succinic anhydride modified wood; and the water-soluble low molecular weight melamine-modified urea-formaldehyde resin is impregnated into the succinic anhydride-modified wood by a vacuum pressure impregnation technique, andthen the impregnated wood is subjected to the vacuum drying treatment to finally obtain the functional wood. Compared with methods using single resin impregnation treatment, the method adopted in theinvention enhances the dimension stability, mechanical properties and durability of the prepared wood and makes the wood have excellent thermal stability and flame retardation performance due to thegeneration of new strong chemical bonds between the resin impregnation modifier and the succinic anhydride pretreated wood.

Description

technical field [0001] The invention relates to the field of wood modification, in particular to a method for preparing functional wood by pretreating wood with resin impregnation. Background technique [0002] As an abundant renewable green resource, wood is widely used in engineering construction materials due to its excellent properties. For example: (1) The strength-to-weight ratio of wood is larger than that of ordinary metal, that is, the wood density is low and the strength is high; (2) The wood texture is beautiful, the color is rich, it can play a special decorative effect and can effectively absorb harmful to human vision. (3) wood has good thermal and electrical insulation, which can be applied to the handle of appliances; (4) wood has excellent elasticity and plasticity, which increases the safety of use; (5) Wood can regulate temperature and reduce humidity, and has good environmental adaptability. However, at the same time, wood itself also has some disadvant...

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Problems solved by technology

[0004] In order to solve the problems of single product function, poor durability and complex preparation process in the existing wood modification, the purpose of the present invention is to provide a method for modifying wood. Firstly, succinic anhydride is used to pretreat the wood to improve wood performance. , to make the wood obtain carboxyl grafting anchor points, and add a functional modifier again: melamine-modified urea-formaldehyde resin, pretreat the wood by vacuum pressure impregnation, so that the functional groups of the melamine-modified urea-formaldehyde resin and the wood after succinic anhydride pretreatment Grafted anchors polymerize in situ, thus endowing the wood with excellent dimensional stability, durability, mechanical properties, thermal stability and flame retardancy

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