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Activation method for electromagnetic shielding fabrics before chemical plating based on PAMAM (polyamidoamine)/ palladium ligand

A technology of electromagnetic shielding and activation method, which is applied in the fields of magnetic field/electric field shielding, liquid chemical plating, electrical components, etc., to achieve the effects of reducing usage, increasing catalytic activity, and reducing production costs

Inactive Publication Date: 2012-08-15
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects in the above-mentioned existing electromagnetic shielding fabric chemical plating activation technology, to provide a simple, stable, and highly efficient activator preparation method and its activation processing method before chemical plating, so as to endow electromagnetic Excellent properties such as easy initial plating, uniform coating and firm coating for shielding fabric metal electroless plating

Method used

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  • Activation method for electromagnetic shielding fabrics before chemical plating based on PAMAM (polyamidoamine)/ palladium ligand
  • Activation method for electromagnetic shielding fabrics before chemical plating based on PAMAM (polyamidoamine)/ palladium ligand
  • Activation method for electromagnetic shielding fabrics before chemical plating based on PAMAM (polyamidoamine)/ palladium ligand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Synthesis of dendrimer PAMAM

[0042] Add 9.0g (0.15mol) of ethylenediamine and 32g (1.0mol) of methanol into a three-necked flask with a magnetic stirrer, a reflux condenser and a thermometer, and dropwise add 103.2g (1.2mol) of Methyl acrylate was reacted for 24 hours; then, under reduced pressure distillation at 22°C and 133 Pa pressure, the solvent methanol and excess methyl acrylate were removed to obtain 0.5 generation (0.5G) PAMAM.

[0043] Add 60.6g (0.15mol) of 0.5 generation PAMAM and 192g (1.0mol) of methanol into a three-necked flask with a magnetic stirrer, a reflux condenser and a thermometer, and add 216g (1.2mol) of ethyl alcohol dropwise under stirring at 25°C. Diamine, reacted for 24 hours; distilled under reduced pressure at 72°C and 133Pa pressure to remove solvent methanol and excess ethylenediamine to obtain 1.0 generation (1.0G) PAMAM.

[0044] 77.4g (0.15mol) of 1.0 generation PAMAM and 231g (1.0mol) of methanol were added to a three-necked ...

Embodiment 2

[0056] (1) Synthesis of PAMAM

[0057] Synthetic process is with embodiment 1 (1)

[0058] (2) Preparation of activator solution:

[0059] The preparation concentration is 2.1×10 -2 1G PAMAM solution of mol / L and 2g / L palladium chloride solution (as Pd 2+ concentration meter). Mix palladium chloride and dendrimer solution at a molar ratio of 3:1 to prepare an activator solution, Pd 2+ The concentration is 0.1g / L.

[0060] (3) Fabric activation treatment

[0061] With (3) in embodiment 1.

[0062] (4) Restore

[0063] The process is the same as (4) in Example 1.

[0064] (5) Electroless plating

[0065] The process is the same as (5) in Example 1 to obtain an electroless copper-plated electromagnetic shielding material. The average square resistance value of the surface of the measured material is 65mΩ / sq, and the shielding effectiveness is 50dB.

Embodiment 3

[0067] (1) Synthesis of PAMAM

[0068] Synthetic process is with embodiment 1 (1)

[0069] (2) Preparation of activator solution:

[0070] The preparation concentration is 7.2×10 -3 2G PAMAM solution of mol / L and 1g / L palladium chloride solution (as Pd 2+ concentration meter). Mix palladium chloride and dendrimer solution at a molar ratio of 6:1 to prepare an activator solution, Pd 2+ The concentration is 0.2g / L.

[0071] (3) Fabric activation treatment

[0072] With (3) in embodiment 1.

[0073] (4) Restore

[0074] Immerse the padded fabric in 3g / L borohydride solution for 30min, wash it with deionized water, and dry it.

[0075] (5) Electroless plating

[0076] The process is the same as (5) in Example 1 to obtain an electroless copper-plated electromagnetic shielding material. The average surface resistance of the measured material is 12mΩ / sq, and the shielding effectiveness is 85dB.

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Abstract

The invention relates to an activation method for electromagnetic shielding fabrics before chemical plating based on PAMAM (polyamidoamine) / palladium ligand. The activation method includes four steps of preparing PAMAM dendrimer solution; preparing dendrimer PAMAM-palladium activating finishing liquor; performing fabric activation; and performing chemical plating. Compared with the prior art, theinvention provides a simple, convenient and stable preparation method for an activating agent with a high-efficient catalysis effect and the activation processing method before chemical plating. Accordingly, the activation method has excellent advantages that metal chemical initial plating of the electromagnetic shielding fabrics is easy, a plating layer is uniform and firm, and the like.

Description

technical field [0001] The invention relates to a processing method of a functional electromagnetic shielding fabric, which belongs to the field of chemical engineering and textile functional finishing, in particular to a method for activating an electromagnetic shielding fabric before electroless plating based on PAMAM / palladium ligand. Background technique [0002] The rapid development of the electronic information industry, especially the wide application of electronic and electrical equipment, has formed a complex electromagnetic pollution environment. Electromagnetic waves will not only cause mutual interference of electronic products, but also pose a serious threat to human health. The impact of electromagnetic radiation on human safety and health has attracted widespread attention both domestically and internationally. Electromagnetic shielding fabric (or conductive fabric), as a new type of EMC (Electromagnetic Compatibility) flexible material, has both the electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/30D06M11/83H05K9/00
Inventor 沈勇张惠芳王黎明白林翠颜峰杨艳李国春叶凤英
Owner SHANGHAI UNIV OF ENG SCI
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