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Polymethyl methacrylate simulated redwood composite material and preparation method thereof

A technology of polymethyl methacrylate and methyl methacrylate, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of inability to improve dimensional stability, creep, and poor dimensional stability, and achieve Improve the use value, high economic benefit and low cost

Inactive Publication Date: 2010-08-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as we all know, most polymer materials have creep phenomenon, that is, poor dimensional stability.
The wood component in the above composites does not contribute to dimensional stability

Method used

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  • Polymethyl methacrylate simulated redwood composite material and preparation method thereof
  • Polymethyl methacrylate simulated redwood composite material and preparation method thereof
  • Polymethyl methacrylate simulated redwood composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) immerse a piece of pine board in 1% NaOH lye to carry out reflux degreasing treatment, the treatment time is 10 hours, and the treatment temperature is 80°C;

[0040] (2) Take out the wood, wash away the lye with water at 60°C, and then dry it at 60°C;

[0041] (3) At room temperature, vacuum the wood for 1 hour, then inject methyl methacrylate monomer and dye (disperse violet S-4B) under vacuum, the mixture of methyl methacrylate monomer and dye The mass ratio is 40:1, remove the vacuum after the solution immerses the wood, and maintain the immersion for 1 hour;

[0042] (4) Place the wood soaked with methyl methacrylate monomer and dye in a dryer, and polymerize polymethyl methacrylate for 2 hours at a temperature of 120° C.;

[0043] (5) Take it out and polish the surface to obtain the imitation mahogany composite material.

[0044] (6) After testing, the density value of the imitation mahogany composite material spline has changed from 0.42g / cm before treatmen...

Embodiment 2

[0046] (1) Immerse a Chinese fir board in 1.5% NaOH lye to carry out reflux degreasing treatment, the treatment time is 12 hours, and the treatment temperature is 90°C;

[0047] (2) Take out the wood, wash away the lye with reflux at 70°C, and then dry it at a temperature of 65°C;

[0048] (3) At room temperature, vacuum the wood for 2 hours, then inject methyl methacrylate monomer and dye (disperse black EX-SF) under vacuum, the mixture of methyl methacrylate monomer and dye The mass ratio is 50:1, remove the vacuum after the solution is immersed in the wood, and maintain the immersion for 2 hours;

[0049] (4) Place the wood soaked with methyl methacrylate monomer and dye in a dryer, and polymerize polymethyl methacrylate for 3 hours at a temperature of 110° C.;

[0050] (5) Take it out and polish the surface to obtain the imitation mahogany composite material.

Embodiment 3

[0052] (1) Immerse a cypress board in 2% Na 2 CO 3 Carry out reflux degreasing treatment in the lye, the treatment time is 15 hours, and the treatment temperature is 95°C;

[0053] (2) Take out the wood, wash away the lye with water at 80°C, and then dry it at a temperature of 70°C;

[0054] (3) At room temperature, vacuum the wood for 2.5 hours, then inject methyl methacrylate monomer and dye (disperse brown 2B-FS) under vacuum, the mixture of methyl methacrylate monomer and dye The mass ratio is 60:1, remove the vacuum after the solution is immersed in the wood, and maintain the immersion for 2.5 hours;

[0055] (4) Place the wood soaked with methyl methacrylate monomer, catalyst and dye solution in a dryer, and carry out polymethyl methacrylate polymerization at a temperature of 100°C for 4 hours;

[0056] (5) Take it out and polish the surface to obtain the imitation mahogany composite material.

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Abstract

The invention relates to a polymethyl methacrylate simulated redwood composite material and a preparation method thereof. The material is a composite material prepared by using softwood as a substrate and introducing a methyl methacrylate monomer to be soaked into the softwood. The preparation method comprises the following steps of: (1) soaking the softwood in an alkali liquor to perform reflux degreasing; (2) taking out the softwood after the degreasing, refluxing the softwood to remove the alkali liquor, and drying the softwood; (3) in a vacuum state at the normal temperature, soaking the softwood in solution of the methyl methacrylate monomer dissolved with a dye for 0.5 to 10 hours; and (4) putting the softwood into a drying apparatus, and performing polymerization to obtain the polymethyl methacrylate simulated redwood composite material. The polymethyl methacrylate simulated redwood composite material prepared by the method improves the density of woods, reduces the water absorption, the swell-shrink characteristics and the sensitivity to climates of the woods, and improves the dimensional stability and the balance of mechanical properties; besides, the preparation method is simple to operate and has a low cost and high economic benefits.

Description

technical field [0001] The invention belongs to the field of imitation mahogany composite material and its preparation, in particular to a polymethyl methacrylate imitation mahogany composite material and a preparation method thereof. Background technique [0002] Mahogany is a kind of precious wood, mainly red sandalwood (RED SANDALWOOD, mainly produced in India, Vietnam, Thailand, Myanmar and Nanyang Islands), rosewood (BLACKWOOD, distributed in tropical and subtropical regions), rosewood (PADAK, distributed in tropical regions of the world), wenge, etc. Mahogany has the characteristics of compact structure, corrosion resistance, hard and delicate material, special aroma, and deep color. It is a fine wood product and has been favored by people for a long time. [0003] Redwood has a long growth period. After long-term logging by humans, redwood resources have been greatly reduced. In the context of countries strengthening the protection of their own forest resources, mah...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/34B27K7/00B27K5/04
Inventor 杨庆黄秀成章悦庭甘菊苏峰袁增艺
Owner DONGHUA UNIV
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