'Copper/straw' electromagnetic wave shield composite material and preparation method thereof

A composite material, electromagnetic wave technology, applied in the fields of magnetic/electric field shielding, electrical components, layered products, etc., can solve problems such as action errors, and achieve high conductivity, high electromagnetic wave shielding efficiency, large market prospects and application value.

Inactive Publication Date: 2011-07-13
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of information technology, computer networks, information processing equipment, electronic communication equipment and various electrical equipment have been widely used in various industries as the carrier of information technology; electromagnetic signals, due to their susceptibility to external electromagnetic interference, cause operational errors, with serious consequences

Method used

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  • 'Copper/straw' electromagnetic wave shield composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Wash 3 g of wheat straw with deionized water, dry it, place it in a 0.01% ethanol solution of 3-aminopropyltrimethoxysilane, soak it for 5 minutes, take it out, rinse it with ethanol, and dry it. dry to obtain surface-modified wheat straw.

[0025] putting the modified straw into the silver nanoparticle sol solution, standing for 1 hour, taking it out and washing it, and obtaining the surface-activated wheat straw.

[0026] Dissolve copper sulfate (10g), nickel sulfate (1.5g), sodium potassium tartrate (50g), sodium carbonate (7.5g), sodium hydroxide (10g), glucose (18g) in 500mL of deionized water, after the dissolution is complete, add deionized water until the volume of the solution is 1 L to obtain a copper electroless plating solution.

[0027] Place the surface-activated wheat straw in the above-mentioned plating solution, perform electroless plating at room temperature for 10 minutes, take it out, wash it with water, and dry it to obtain a "copper / straw" composi...

Embodiment 2

[0029] Wash 3 g of rice straw with deionized water, dry it, place it in a methanol solution of 0.05% 3-aminopropyltriethoxysilane, soak it for 3 minutes, take it out, rinse it with methanol, drying to obtain surface-modified rice straw.

[0030] Putting the modified straw into the silver nanoparticle sol solution, standing for 1 hour, taking it out and washing it, to obtain surface-activated rice straw.

[0031] Dissolve copper sulfate (15g), nickel sulfate (2g), sodium potassium tartrate (70g), sodium carbonate (10g), sodium hydroxide (12g), glucose (20g) in 500mL deionized water, after the dissolution is complete, add deionized water until the volume of the solution is 1L to obtain a copper electroless plating solution.

[0032] Place the surface-activated rice straw in the above-mentioned plating solution, electroless plate at room temperature for 30 minutes, take it out, wash it with water, and dry it to obtain a "copper / straw" composite material, the weight ratio of copp...

Embodiment 3

[0034] Wash 10 g of corn stalks with deionized water, dry them, place them in a 5% acetone solution of 3-mercaptopropyltrimethoxysilane, soak them for 5 minutes, take them out, rinse them with acetone, and dry them. dried to obtain surface-modified corn stover.

[0035] putting the modified straw into the silver nanoparticle sol solution, standing for 1 hour, taking it out and washing it, and obtaining the surface-activated corn straw.

[0036] Dissolve copper sulfate (10g), nickel sulfate (1.5g), sodium potassium tartrate (50g), sodium carbonate (10g), sodium hydroxide (12g) and glucose (20g) in 500mL of deionized water. deionized water until the volume of the solution is 1L to obtain a copper electroless plating solution.

[0037] Place the surface-activated corn stalks in the above-mentioned plating solution, electroless plate at room temperature for 5 minutes, take them out, wash them with water, and dry them to obtain a "copper / stalk" composite material, the weight ratio...

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Abstract

The invention belongs to the technical field of electromagnetic wave shield materials, and relates to a 'copper / straw' electromagnetic wave shield composite material and a preparation method thereof. The composite material provided by the invention is prepared by plating copper membranes on the straws. The preparation method comprises the following steps: cleaning straws; immerging the cleaned straws in a silane coupling agent solution, and stoving; and carrying out silver nano particle activation, chemically copper plating and the like. The adhesivity between the copper membrane and straw substrate of the composite material is good, and can be tested through the Scotch tapes of a 3M (Minnesota Mining and Manufacturing) company; the electromagnetic wave shield efficiency of the 'copper / straw' composite material within the range of 0.15-1050MHz is more than 40dB, i.e., the electromagnetic wave anti-radiation rate is more than 99.99%. The composite material has the advantages of low cost, simple manufacturing process, great market prospect and favorable application value, can be widely applied to the electromagnetic wave shield of large-area building wall bodies, and is used for externally packaging the electromagnetic wave shield by precise instrument and the like.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave shielding materials, and in particular relates to a "copper / straw" electromagnetic wave shielding composite material and a preparation method thereof. Background technique [0002] With the rapid development of information technology, computer networks, information processing equipment, electronic communication equipment and various electrical equipment have been widely used in various industries as the carrier of information technology; electromagnetic signals, due to their susceptibility to external electromagnetic interference, cause operational errors, resulting in serious consequences. From the perspective of electromagnetic signal leakage and confidentiality, regardless of military secrets or commercial secrets, the leakage of electromagnetic waves will cause great losses to relevant units, so corresponding shielding measures must be taken; The protection of various electromagn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/20C23C18/40B32B9/04H05K9/00
Inventor 顾隽婕吕银祥
Owner FUDAN UNIV
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