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Method for modifying wood by filling grafted cell walls with organic monomers and polymerization-filling cell cavities

A polymeric filling and cell wall technology, applied in the direction of impregnated wood, wood impregnation, wood processing utensils, etc., can solve the problems that it is difficult to improve the mechanical properties and durability of wood at the same time, and achieve the improvement of two-phase interface compatibility, excellent durability, The effect of improving durability

Inactive Publication Date: 2011-01-26
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing wood modification methods are difficult to simultaneously improve the mechanical properties and durability of wood, and to provide a method for joint modification of wood by using organic monomers to inflate grafted cell walls and polymerize and fill cell lumens

Method used

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  • Method for modifying wood by filling grafted cell walls with organic monomers and polymerization-filling cell cavities
  • Method for modifying wood by filling grafted cell walls with organic monomers and polymerization-filling cell cavities
  • Method for modifying wood by filling grafted cell walls with organic monomers and polymerization-filling cell cavities

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specific Embodiment approach 1

[0011] Embodiment 1: In this embodiment, the method of using organic monomers to inflate grafted cell walls and polymerize and fill cell lumens to jointly modify wood is as follows: 1. The configuration of the organic acid anhydride solution: dissolve the organic acid anhydride in acetone or tetrahydrofuran, and then Add 3 to 5 drops of pyridine to make an organic anhydride solution with an organic anhydride mass fraction of 10 to 30%; 2. Impregnation of wood with an organic anhydride solution: Immerse the wood in the organic anhydride solution at a vacuum of -0.08 Vacuum for 20 minutes under the condition of MPa, then pressurize for 20 minutes under the pressure of 0.8MPa, return to normal pressure, wrap the wood with aluminum foil and leave it for 12-24 hours at normal temperature and pressure; 3. The heating method realizes the organic acid anhydride swelling joint Branch wood cell wall: heat the wood covered with aluminum foil paper at 110°C-130°C for 2-4 hours, then remove...

specific Embodiment approach 2

[0017] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the organic acid anhydride described in step 1 is a mixture of two or three of maleic anhydride, succinic anhydride and phthalic anhydride. Others are the same as in the first embodiment.

[0018] In this embodiment, when the organic acid anhydride is a mixture, the ratios between the components are arbitrary.

specific Embodiment approach 3

[0019]Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the organic polymerizable monomer described in step four is methyl methacrylate, ethyl methacrylate, n-butyl methacrylate , isobutyl methacrylate, n-hexyl methacrylate, benzyl methacrylate, decyl methacrylate, lauryl methacrylate, stearyl methacrylate, alpha-hydroxyethyl methacrylate, methyl α-hydroxypropyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, 3-chloro-2-hydroxypropyl methacrylate, 2,3-dimethacrylate Propyl Bromide, Cyclohexyl Methacrylate, Ethylene Glycol Dimethacrylate, Diethylene Glycol Dimethacrylate, Triethylene Glycol Dimethacrylate, Tetraethylene Glycol Dimethacrylate, Polyethylene glycol dimethacrylate, monopropylene glycol dimethacrylate, dipropylene glycol dimethacrylate, tripropylene glycol dimethacrylate, 1,3-butanediol dimethacrylate, 1,4 -Butanediol Dimethacrylate, Bisphenol A Dimethacrylate, 2,2-Bis[methacryloy...

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Abstract

The invention discloses a method for modifying wood by filling grafted cell walls with organic monomers and polymerization-filling cell cavities, which relates to a wood modification method. The invention solves the problem of difficulty in simultaneously enhancing mechanical properties and durability of wood in the existing wood modification method. The method comprises the following steps: 1, preparing organic acid anhydride solution; 2, soaking the wood with the organic acid anhydride solution; 3, filling grafted wood cell walls with organic acid anhydride by heating; 4, preparing the organic polymerizable monomer solution; 5, soaking the wood with the organic polymerizable monomer solution; and 6, carrying out polymerization-filling on the wood cell cavities with the monomers by heating. Since organic function micromolecules firstly enter the wood cell walls, the method realizes filling and bonding and eliminates a great deal of hydroxyl groups in the cell walls, thereby enhancing wood durability; and the wood cell cavities are soaked by the organic polymerizable monomers to initiate the polymerization and realize the filling of the cell cavities, so that the wood has higher mechanical properties and durability.

Description

technical field [0001] The invention relates to a method for modifying wood. Background technique [0002] Wood has been a natural and renewable biomass-polymer composite material that humans rely on for survival since ancient times. Its unique chemical composition, including cellulose with a large number of hydroxyl groups and surrounding amorphous hemicellulose and lignin, constitutes the wood cell wall matrix, and then forms a natural honeycomb structure with a high strength-to-weight ratio. These properties make it superior to other materials in many fields. However, according to different uses, wood, especially fast-growing wood such as poplar, fir, etc., also presents some unfavorable characteristics. For example, fast-growing tree species have poor mechanical properties and are difficult to use as structural materials; most woods have low durability, the wood matrix is ​​easy to decay and degrade, and the size is easy to expand and shrink with changes in environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/50
Inventor 李永峰董晓英刘一星
Owner NORTHEAST FORESTRY UNIVERSITY
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