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Preparation method of high-heat-conductivity veneer graphene impregnated modified wood

A graphene, high thermal conductivity technology, applied in wood impregnation, wood impregnation, pressure impregnation, etc., can solve problems such as low thermal conductivity, achieve uniform heat dissipation, shorten heat transfer time, and reduce energy consumption.

Active Publication Date: 2019-05-24
NANJING FORESTRY UNIV +1
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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 of low thermal conductivity of natural wood, to provide a kind of high thermal conductivity veneer graphene impregnated modifier using graphene to improve the thermal conductivity of wood, and the modified The method of using wood as the wood base material of the ground heating floor

Method used

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  • Preparation method of high-heat-conductivity veneer graphene impregnated modified wood
  • Preparation method of high-heat-conductivity veneer graphene impregnated modified wood

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: Preparation of graphene / phenolic resin impregnated modified veneer

[0024] Due to the high solid content of water-soluble phenolic resin, it is not easy to impregnate and will solidify on the equipment, which will cause difficulties in equipment cleaning. It needs to be diluted with absolute ethanol to a solid content of 15% to 30%. Mix the diluted phenolic resin with graphene in an amount of 1% to 3% to obtain a blend solution, where the added amount is defined as: the mass ratio (solid content) of the mixed phenolic resin is 1% to 3%; The blended solution was magnetically stirred for 10 to 30 minutes, and then ultrasonically dispersed with an ultrasonic breaker (ultrasonic power of 80w, ultrasonic time of 20 to 30min), and the graphene / phenolic resin impregnated modifier was obtained.

[0025] Sorting the fast-growing poplar veneer to remove the wormy and moldy boards, so that the impregnating agent can better enter the wood cells. Sand the surface and si...

Embodiment 2

[0026] Example 2: Preparation of graphene / polyvinyl alcohol impregnated modified veneer

[0027] Pour polyvinyl alcohol (type p1788, degree of alcoholysis: 87.0-89.0% (mol / mol)) into the water bath slowly, and keep stirring with a glass rod, fully contact with the distilled water in the pot to avoid condensation, and finally Magnetic stirring for 45-60 min to obtain an aqueous solution of polyvinyl alcohol with a mass concentration of 5-15%; mixing the aqueous solution of polyvinyl alcohol with graphene in an addition amount of 1%-3% to obtain a blended solution, where the addition amount is defined as: 1% ~ 3% of the solute mass of the mixed polyvinyl alcohol aqueous solution; put the blended solution into an ultrasonic breaker for ultrasonic dispersion (ultrasonic power is 80w, ultrasonic time is 20 ~ 30 min), and the graphene / polymer Vinyl alcohol impregnation modifier.

[0028] Sorting the fast-growing poplar veneer to remove the wormy and moldy boards, so that the impreg...

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Abstract

The invention provides a preparation method of high-heat-conductivity veneer graphene impregnated modified wood, which mainly comprises the following steps: 1) preparing a graphene impregnation modifier by taking graphene as a heat-conductivity filler; 2) sorting a veneer, polishing the surface and side edges of the veneer, and drying to obtain a veneer test piece; 3) immersing the veneer test piece in the impregnation modifier, taking out the veneer test piece after vacuum impregnation and normal pressure impregnation, and draining the veneer test piece to obtain the graphene impregnatied modified veneer with improved heat conductivity. The method has the advantages that 1) the porosity of the wood is effectively reduced, so that the density and stability of the wood are enhanced while the heat conductivity of the wood is improved; 2) the heating time of the wood is shortened, the heat transfer efficiency is improved, and the energy consumption is reduced; 3) the wood can be used as abase material to be applied to the production of a ground heating floor, is suitable for various heating modes, and has the advantages of energy saving, consumption reduction, uniform heat dissipation, stable structure and the like.

Description

technical field [0001] The invention relates to a preparation method of highly thermally conductive veneer graphene impregnated modified wood, which belongs to the technical field of wood treatment technology. Background technique [0002] The thermal conductivity of natural wood is low, generally 0.04~0.12 W m -1 ·K -1 , It is not easy to dissipate heat and conduct heat, which is a bad conductor. The heat transfer process of wood mainly uses two-part structure as the heat transfer carrier, one part is the dense part of the annual ring, which is equivalent to solid heat conduction; the other part is the heat transfer of the porous structure part of wood. Due to the small thermal conductivity of air, the larger the cavity volume filled with air, the worse the thermal conductivity, that is, the higher the ratio (porosity) of the cavity volume filled with air to the total cell volume in wood, the higher the density. The lower the value, the lower the thermal conductivity. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/52
Inventor 徐伟陶鑫吴燕詹先旭
Owner NANJING FORESTRY UNIV
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