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A preparation method of large-density anisotropic conductive metallized wood

A high-density, metallized technology, applied in wood impregnation, wood treatment, impregnated wood, etc., can solve the problems of inconvenient operation, difficulty in ensuring uniform penetration, high risk, etc., to save the penetration process and maintain structure and strength , the effect of increasing the permeability

Active Publication Date: 2020-07-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-pressure impregnation operation is inconvenient and dangerous, and the permeability of the molten metal in the fiber structure is affected by temperature, pressure, and channel structure characteristics, and the uniformity of penetration is difficult to guarantee

Method used

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  • A preparation method of large-density anisotropic conductive metallized wood
  • A preparation method of large-density anisotropic conductive metallized wood
  • A preparation method of large-density anisotropic conductive metallized wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] As shown in Figures 1 to 3, what the present embodiment prepared was basswood-tin-bismuth alloyed wood, and the preparation steps were as follows:

[0043] Step (1): The wood and metal used are basswood and tin-bismuth alloy with a melting point of 138° C. respectively. Cut basswood into a size of 35mm*35mm*5mm, put it in a beaker, add 40mL of dilute ammonia water with a mass fraction of 5%, cover the mouth of the beaker with plastic film to prevent volatilization, heat it to 80°C for five hours, and wash off the wood Lignin in the fiber structure. Take out the pretreated wood, put it into the oven, and press it on the upper surface of the wood with a flat steel block to prevent the wood from deforming during drying, then adjust the temperature of the oven to 100°C, bake for 2 hours, and take out the dried wood for use.

[0044] Step (2): Put the tin-bismuth alloy (tin 42%, bismuth 58%) in the beaker, adjust the temperature of the oven to 180° C., and wait for the meta...

Embodiment 2

[0051] What this embodiment needs to prepare is pine-tin-bismuth alloyed wood, and the preparation method adopted is basically the same as that of Example 1, except that:

[0052] The pine wood that adopts and the alloy that melting point is 180 ℃ of tin 62% bismuth 38% are raw materials. The melting point of the metal becomes higher, and the temperature of the vacuum oven needs to be kept at 220°C. In order to make the tin-bismuth alloy have better fluidity, the holding time needs to be increased to 1 hour. The obtained pine-tin-bismuth alloy metallized wood is shown in Figure 3.

[0053] The change in density is obtained as follows:

[0054] Timber specification 35mm*35mm*5mm, melting point: 180°C

[0055]

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Abstract

The invention belongs to the field of preparation of composite performance materials, and provides a preparation method of high-density anisotropic conductive metalized wood, which comprises the following steps: pretreating a wood fiber structure; carrying out vacuum infiltration on metal liquid in a wood fiber channel; and carrying out surface treatment on the metalized wood. In the pretreatmentstep, lignin in a log fiber structure is washed away without destroying the fiber structure by adopting a mixed solvent of dilute ammonia water and an alkali metal halide aqueous solution, a good fiber channel is provided for permeation of molten metal, and meanwhile, nano halide molten salt particles precipitated from the wood fiber structure can achieve a flame retardant effect at a high temperature; the permeated metal is an alloy material, the metal is melt into a liquid state in a constant-temperature vacuum oven, then wood to be permeated is soaked into the molten metal, and permeation is carried out under a vacuum condition; and after the permeation is completed, the surface of the metalized wood finishing the permeation is polished through mechanical polishing equipment, and thus the large-density anisotropic metalized wood with a uniform surface and a good state is obtained.

Description

technical field [0001] The invention mainly belongs to the field of preparation of composite performance materials, and in particular relates to a preparation method of large-density anisotropic conductive metallized wood. Background technique [0002] Wood is widely used in daily life. It is easy to process, has good heat insulation and sound insulation properties, but its defects such as large variability in properties, poor dimensional stability, perishability, and flammability limit the use of wood. After the wood is metallized, the wood has both the characteristics of wood and metal, the density and strength are improved, and the respective advantages of wood and metal are combined. Wood metallization is to fill low-melting point metals into the capillary channels of wood or plate them on the surface of wood. The former increases the density of wood more, and improves the performance of wood more; the surface coating of the latter does not significantly increase the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/02B27K3/08B27K3/32B27K5/00
Inventor 王敏李岚昕包燕平陈亚楠
Owner UNIV OF SCI & TECH BEIJING
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