Method for preparing functional wood by resin impregnation pretreatment of wood

A technology of resin impregnation and pretreatment, which is used in impregnating wood, pretreatment equipment, wood treatment, etc., can solve the problems of single product function, poor durability, complicated preparation process, etc., and achieve simple production process, reduce production cost, and reduce hydroxyl groups. effect of quantity

Inactive Publication Date: 2019-04-30
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

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 modifie

Method used

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  • Method for preparing functional wood by resin impregnation pretreatment of wood
  • Method for preparing functional wood by resin impregnation pretreatment of wood
  • Method for preparing functional wood by resin impregnation pretreatment of wood

Examples

Experimental program
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Example Embodiment

[0022] Example 1

[0023] (1) Wood pretreatment: prepare succinic anhydride and N,N-dimethylformamide according to the mass ratio of 1:4 to prepare the pretreatment modifier; first add succinic anhydride to N,N-dimethylformamide In the amide organic solvent, stir with a magnetic stirrer at a speed of 200 rpm for 20 minutes and heat to 50° C. to completely dissolve the succinic anhydride. Subsequently, a certain size of wood block was added to the solution, and the wood was treated at 70°C for 3 hours.

[0024] (2) Drying treatment: The treated wood is taken out of the reaction solution, and after cooling to room temperature, the treated material is washed with ethanol to remove unreacted succinic anhydride and residual N,-N dimethylformamide. Finally, the wood block is placed in an oven at 70°C and dried until the moisture content reaches 15%.

[0025] (3) Resin impregnated wood: Place the dried pretreated wood in an impregnating tank, and when the tank is evacuated to a negative p...

Example Embodiment

[0027] Example 2

[0028] (1) Wood pretreatment: prepare succinic anhydride and N,N-dimethylformamide according to the mass ratio of 2:5 to prepare pretreatment modifier; first add succinic anhydride to N,N-dimethylformamide In the amide organic solvent, stir with a magnetic stirrer at a speed of 300 rpm for 20 minutes and heat to 50° C. to completely dissolve the succinic anhydride. Subsequently, a certain size of wood block was added to the solution, and the wood was treated at 80°C for 4 hours.

[0029] (2) Drying treatment: The treated wood is taken out of the reaction solution, and after cooling to room temperature, the treated material is washed with ethanol to remove unreacted succinic anhydride and residual N,-N dimethylformamide. Finally, the wood block is placed in an oven at 70° C. and dried until the moisture content reaches 14%.

[0030] (3) Resin impregnated wood: Place the dried pretreated wood in an impregnating tank, and when the tank is evacuated to a negative pre...

Example Embodiment

[0032] Example 3

[0033] (1) Wood pretreatment: prepare succinic anhydride and N,N-dimethylformamide according to the mass ratio of 1:2 to prepare pretreatment modifier; first add succinic anhydride to N,N-dimethylformamide In the amide organic solvent, stir with a magnetic stirrer at a speed of 300 rpm for 20 minutes and heat to 50° C. to completely dissolve the succinic anhydride. Subsequently, a certain size of wood block was added to the solution, and the wood was treated at 90°C for 6 hours.

[0034] (2) Drying treatment: the treated wood is taken out of the reaction solution, and after cooling to room temperature, the treated material is washed with ethanol to remove unreacted succinic anhydride and residual N,N-dimethylformamide. Finally, the wood block is placed in an oven at 70° C. and dried until the moisture content reaches 13%.

[0035] (3) Resin impregnated wood: Place the dried pretreated wood in an impregnating tank, and when the tank is evacuated to a negative pres...

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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...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/08B27K3/52B27K5/04
CPCB27K3/0214B27K3/08B27K3/52B27K5/04
Inventor 蒲俊文王振兴韩小帅韩学文张琴琴陈志兵
Owner BEIJING FORESTRY UNIVERSITY
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