Method for preparing environmentally-friendly plastic wood

An environment-friendly, wood-based technology, applied in the direction of manufacturing tools, wood processing equipment, pressure impregnation, etc., can solve the problems of serious monomer volatilization and low monomer conversion rate, and achieve good dimensional stability, simple operation process, and anti-corrosion performance strong effect

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

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of serious volatilization of monomers and low conversion rate of monomers in the existing preparation methods of plastic composite wood, and provides an environment-friendly preparation method of plastic composite wood.

Method used

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  • Method for preparing environmentally-friendly plastic wood
  • Method for preparing environmentally-friendly plastic wood
  • Method for preparing environmentally-friendly plastic wood

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Embodiment 1: The preparation method of the environment-friendly plastic composite wood of this embodiment is carried out according to the following steps: 1. Weigh 89% to 93.5% of the organic monomer, 0.5% to 1% of the initiator and 6% ~10% polymerization accelerator, and mix evenly to obtain the impregnating liquid; 2. Add the wood and the impregnating liquid obtained through step 1 into the reaction tank, and immerse the wood in the impregnating liquid, seal the reaction tank and then evacuate to -0.08MPa~-0.095MPa, and keep it for 15min~25min; 3. Release the vacuum and return to normal pressure, and then feed air into the reaction tank to make the pressure in the reaction tank reach 0.8MPa~1MPa, and keep it for 20min~ 30min; 4. Reduce the pressure of the reaction tank to normal pressure, take out the wood, and then wrap the impregnated wood with aluminum foil, first place it at room temperature and normal pressure for 12h~24h, and then heat it to a temperature of 75℃...

specific Embodiment approach 2

[0012] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, 90.1% to 92.4% of organic monomers, 0.6% to 0.9% of initiators and 7% to 9% of Polymerization accelerator. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in Step 1, 91.2% of organic monomers, 0.8% of initiators and 8% of polymerization accelerators are weighed by mass percentage. Others are the same as in the first embodiment.

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Abstract

The invention provides a method for preparing environmentally-friendly plastic wood and relates to a method for preparing plastic wood. The method solves the problems of high monomer volatility and low monomer conversion rate in the conventional preparation method of the plastic wood. The method comprises the following steps of: I, mixing an organic monomer, an initiator and a polymerization promoter uniformly to obtain impregnation liquid; II, adding wood and the impregnation liquid into a reaction tank and vacuumizing the reaction tank; III, performing pressurization by introducing air; IV, wrapping the wood with aluminium foil, placing the wood at normal temperature and under normal pressure, and then heating the wood to obtain the environmentally-friendly plastic wood. The environmentally-friendly plastic wood prepared by the method has the advantages of high monomer conversion rate of 75 to 88 percent, no volatility and no peculiar smell during later application, compressive strength parallel to grain of 90 to 120 MPa, swelling-resistant rate of 40 to 52 percent after being soaked continuously for 200 hours, high size stability, weight loss rate of 7 to 14 percent after being subjected to fungal erosion for 12 weeks and high corrosion resistance. The environmentally-friendly plastic wood can serve as building and interior decoration materials.

Description

technical field [0001] The invention relates to a preparation method of plastic composite wood. Background technique [0002] Wood is widely used in various fields of production and life, but due to defects such as easy decay and degradation of wood, easy shrinkage and swelling due to deformation and cracking, and poor wood performance of fast-growing tree species, the application of wood is limited. The modification of these woods is usually achieved by the in situ generation of polymers in the porous structure of the wood, resulting in plywood. The existing preparation method of plastic composite wood is to impregnate vinyl and / or acrylic monomers into wood as the main reaction monomer, and obtain plastic composite wood through polymerization reaction, but these monomers have low boiling point and high vapor pressure , high toxicity, serious volatilization in the production process, resulting in environmental pollution and dangerous operation; at the same time, the reacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M1/00B27K3/08
Inventor 李永峰吕多军刘一星江驰
Owner NORTHEAST FORESTRY UNIVERSITY
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