Making process of electromagnetically shielding composite wooden material

A composite material and electromagnetic shielding technology, applied in the direction of magnetic/electric field shielding, shielding, impregnated wood, etc., can solve the problems of inability to achieve electromagnetic shielding effect, poor durability of the glue layer, harsh conditions, etc., and achieve high bonding strength of the coating and low manufacturing cost Low, strong binding effect

Inactive Publication Date: 2007-01-31
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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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] Specific embodiment one: this embodiment prepares the electromagnetic shielding wooden composite material according to the following steps: a, wooden veneer is immersed in the colloidal palladium liquid, room temperature treatment 2~12min, this process is to inoculate the metal palladium that contains tool catalysis The micelles; b. Take it out, wash it with water, and then immerse it in dilute hydrochloric acid solution for 0.5-2 minutes. This process exposes the zero-valent metal palladium to play a role in catalyzing the electroless plating process; c. Remove the wooden veneer from the hydrochloric acid solution Take it out and wash it with distilled water; d then place the wooden veneer in a reaction tank filled with nickel plating solution, the ratio of the amount of plating solution to the surface area of ​​the wooden veneer is about 100-300mL / dm 2 , the temperature of the plating solution is 45-95°C, and the plating time is 20-90 minutes, so that the Ni-P alloy co...

specific Embodiment approach 2

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

specific Embodiment approach 3

[0009] Specific embodiment three: In this embodiment, the composition of nickel plating solution, copper plating solution and colloidal palladium liquid is 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 in particular relates to a manufacturing method of wooden electromagnetic shielding materials. Background technique [0002] Currently applied similar technologies 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 woody materials, and pretreat the woody materials by immersing them in an aqueous solution of magnetic metal salts 1. ~24 hours later, take it out and dry it; ② further control its size and shape, fully mix it with modified resin, carry out molding treatment at a certain temperature and pressure, and control its porosity and pore distribution; ③ further in the non-oxygen Under an inert atmosphere, carry out high-temperature treatment within the temperature range of 250-1500 °C, the heating rate is 1-20 °C / min, a...

Claims

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Application Information

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