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Making process of electromagnetically shielding composite wooden material

A composite material, electromagnetic shielding technology, applied in the fields of magnetic/electric field shielding, shielding, impregnating wood, etc., can solve the problems of inability to achieve electromagnetic shielding effect, poor durability of the adhesive layer, harsh conditions, etc. Low, strong bond effect

Inactive Publication Date: 2006-05-17
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of existing technologies that cannot achieve good electromagnetic shielding effect, and have poor durability such as metal corrosion and glue layer cracking, complex process, harsh conditions and high cost, the present invention provides an electromagnetic shielding wooden composite material. The manufacturing method, which uses wood veneer as the matrix material, deposits alloy coatings on both sides of the surface by chemical plating, and makes a wooden electromagnetic shielding composite material with good electromagnetic shielding performance.

Method used

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  • Making process of electromagnetically shielding composite wooden material
  • Making process of electromagnetically shielding composite wooden material
  • Making process of electromagnetically shielding composite wooden material

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specific Embodiment approach 1

[0006] Embodiment 1: The electromagnetic shielding wood composite material is prepared in this embodiment according to the following steps: a. Immerse the wood veneer in a colloidal palladium liquid, and treat it at room temperature for 2-12 minutes. The micelle; b. After taking out, wash with water, and then immerse it in a dilute hydrochloric acid solution for 0.5-2min. This process is to expose the zero-valent metal palladium and play a role in the catalytic chemical plating process; c. Remove the wooden veneer from the hydrochloric acid solution. Take out and wash with distilled water; d. Then place the wooden veneer in a reaction tank filled with a nickel plating solution, and the ratio of the amount of the plating solution to the surface area of ​​the wooden veneer is about 100-300 mL / dm 2 , the bath temperature is 45~95℃, and the plating time is 20~90min, so that the Ni-P alloy coating is continuously deposited on the surface of the wood veneer, and a uniform and continu...

specific Embodiment approach 2

[0008] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in order to improve the electromagnetic shielding effect, the surface of the Ni-P alloy coating is chemically plated with copper, and the wooden veneer is placed in a reaction tank containing a copper plating solution. , the ratio of the plating solution to the surface area of ​​the wood veneer is about 100 to 300 mL / dm 2 , the temperature of the plating solution is 45 to 95 °C, and the plating time is 20 to 90 minutes, so as to form a Ni-Cu composite coating with both corrosion resistance and good electrical conductivity. In this embodiment, the copper plating solution is composed of the following components: 15-35 g / L copper sulfate, 20-60 g / L potassium sodium tartrate, 8-20 mL / L formaldehyde, and the pH of the copper plating solution is 10-13.

specific Embodiment approach 3

[0009] Embodiment 3: In this embodiment, the compositions of the nickel plating solution, the copper plating solution and the colloidal palladium liquid are shown in Tables 1, 2 and 3.

[0010] Nickel sulfate

[0011] copper sulfate

[0012] PdCl 2

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Abstract

The present invention belongs to the field of electromagnetically shielding material, is especially making process of electromagnetically shielding composite wooden material, and aims at raising electromagnetically shielding effect and simplifying the production process of electromagnetically shielding material. The making process of electromagnetically shielding composite wooden material includes the steps of activating wooden material, water washing, dispergation, washing with distilled water, chemically plating nickel and chemically plating copper. The electromagnetically shielding composite wooden material has high electromagnetic shielding effect and electromagnetic shielding efficiency up to 35-60 dB in the frequency range of 30 MHz to 1.5 GHz. The present invention has the advantages of simple technological process, wide material source and low production cost.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding materials, and particularly relates to a manufacturing method of a wooden electromagnetic shielding material. Background technique [0002] Similar technologies currently applied include: 1. A method for preparing electromagnetic shielding composite materials, which belongs to the field of electromagnetic shielding materials. The specific preparation steps are as follows: 1. Select wood materials, and immerse the wood materials in an aqueous solution of magnetic metal salts for pretreatment 1. After ~24 hours, take it out and dry; ② Further control its size and shape, and fully mix it with the modified resin, carry out molding treatment at a certain temperature and pressure, and control its porosity and pore distribution; ③ Further in non-oxygen Under the inert atmosphere, carry out high temperature treatment in the temperature range of 250 ~ 1500 ℃, the heating rate is 1 ~ 20 ℃ / minute, ...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/16B27K3/22G12B17/02H05K9/00
Inventor 王立娟李坚刘一星
Owner NORTHEAST FORESTRY UNIVERSITY
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