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Waterproof bamboo/wood modification method

A wood modification technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of substrate size deformation, water absorption increase, etc.

Active Publication Date: 2018-08-21
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a method for modifying waterproof bamboo / wood, and its purpose is to solve the problems in the prior art that water will slowly penetrate into the base material when the bamboo / wood is modified, resulting in increased water absorption and deformation of the base material size. , to provide a modification method for preparing bamboo heavy wood products with good waterproof function

Method used

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  • Waterproof bamboo/wood modification method
  • Waterproof bamboo/wood modification method
  • Waterproof bamboo/wood modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A modification method of waterproof bamboo / wood, comprising:

[0028] (1) Put the bamboo composite wood with the length, width and height of 800mm, 60mm and 12mm respectively into a drying oven and dry at 103°C for 24 hours;

[0029] (2) Dissolve glycidyl methacrylate in ethanol at a mass ratio of 0.5%, and add an initiator (azobisisobutyronitrile) to ethanol at a mass ratio of 0.1% of glycidyl methacrylate. After stirring, then sonicate for 10 minutes;

[0030] (3) Put the dried bamboo recombined wood into the solution prepared in step (2) and vacuum impregnate for 15 minutes at a vacuum pressure of 30 mbar;

[0031] (4) Take out the bamboo composite material impregnated in step (3), wipe off the excess solution on the surface, wrap it with aluminum foil, put it in an oven for 2 hours at 60°C, and then dry it at 80°C for 24 hours;

[0032] (5) Add oxidized high-density polyethylene wax emulsion in deionized water at a mass ratio of 0.2%, stir evenly for 10 Min, then ...

Embodiment 2

[0037] A modification method of waterproof bamboo / wood, comprising:

[0038] (1) Put the bamboo sheets whose length, width and height are 300mm, 20mm and 12mm respectively into a drying oven and dry at 103°C for 24 hours;

[0039] (2) Dissolve glycidyl methacrylate in ethanol at a mass ratio of 0.1%, and add an initiator (diacyl peroxide) into ethanol at a mass ratio of 0.3% of glycidyl methacrylate, and stir evenly , and then ultrasonic treatment for 10 minutes;

[0040] (3) Put the dried bamboo sheet into the solution prepared in step (2) and vacuum impregnate for 30 minutes, the vacuum pressure is 40mbar;

[0041] (4) Take out the bamboo sheet impregnated in step (3), wipe off the excess solution on the surface, wrap it with aluminum foil, put it in an oven for 2 hours at 60°C, and then dry it at 80°C for 24 hours;

[0042] (5) Add oxidized high-density polyethylene wax emulsion in deionized water at a mass ratio of 0.5%, stir evenly for 10 minutes, then put the bamboo re...

Embodiment 3

[0047] A modification method of waterproof bamboo / wood, comprising:

[0048] (1) Put the poplar wood with the length, width and height of 600mm, 50mm and 20mm respectively into the drying oven and dry at 103°C for 24 hours;

[0049] (2) Dissolve glycidyl methacrylate in ethanol at a mass ratio of 3%, and add an initiator (persulfate) to ethanol at a mass ratio of 0.2% of glycidyl methacrylate, and stir evenly. Sonicate for another 10 minutes;

[0050] (3) Put the dried wood into the solution prepared in step (2) and vacuum impregnate for 10 minutes, the vacuum pressure is 35mbar;

[0051] (4) Take out the wooden beam impregnated in step (3), wipe off the excess solution on the surface, wrap it with aluminum foil, put it in an oven for 2 hours at 60°C, and then dry it at 80°C for 24 hours;

[0052] (5) Add oxidized high-density polyethylene wax emulsion in deionized water at a mass ratio of 2%, stir evenly for 8 Min, then put the wood squares treated in step (4) into it for 4...

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Abstract

The invention relates to a waterproof bamboo / wood modification method. The waterproof bamboo / wood modification method comprises the following steps of (1) making preparations; (2) conducting vacuum impregnation on glycidyl methacrylate; (3) conducting vacuum impregnation on oxidized high-density polyethylene wax emulsion; and (4) conducting drying and surface treatment. Through pretreatment on bamboo / wood through the glycidyl methacrylate, the number of free hydroxyl groups in a base material is reduced, and oxidized high-density polyethylene wax is introduced and attached to cell walls of thebase material to achieve the waterproof purpose of reconstituted bamboo. The waterproof bamboo / wood modification method has the advantages that epoxy groups in the glycidyl methacrylate have an esterification reaction with the free hydroxyl groups in a bamboo material, the free hydroxyl groups are decreased, and meanwhile, the glycidyl methacrylate is grafted onto the cell walls of the bamboo material; ethyl alcohol is volatized under the high-temperature effect to provide a space for next-step immersion; the glycidyl methacrylate is copolymerized and combined with oxidized high-density polyethylene to prevent water from being immersed into a channel, and the number of hydrophilic groups is reduced.

Description

technical field [0001] The invention relates to a method for modifying waterproof bamboo / wood, which belongs to the technical field of bamboo and wood processing. Background technique [0002] In order to improve the dimensional stability, mildew resistance and corrosion resistance of bamboo / wood products, chemical modification technology has been widely used in the field of wood processing. At present, the chemical modification methods used in the bamboo / wood processing industry mainly include acetylation Treatment, furfural modification and acid anhydride modification, etc. Recently, paraffin wax high temperature modification or paraffin wax emulsion impregnation modification have also been gradually adopted. Paraffin wax high-temperature modification is mainly to melt and infiltrate paraffin particles into bamboo or wood at high temperature, while paraffin wax emulsion modification is to directly immerse paraffin particles into wood or bamboo through vacuum impregnation, ...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K3/34B27K5/04
CPCB27K3/08B27K3/34B27K5/04
Inventor 何文张爱文杨阳王俊李延军许斌程大莉蒋身学
Owner NANJING FORESTRY UNIV
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