Activation method before flexible backing material chemical plating based on numerator self-assembly technique

A self-assembly technology and flexible substrate technology, which is applied in the field of activation of flexible substrates before electroless plating, to achieve the effects of cost reduction, good bonding fastness, and reduced dosage

Inactive Publication Date: 2008-12-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no patent report on the use of self-assembled film preparation technology to form a catalytic film with chitosan or its derivatives as a carrier on the surface of a flexible substrate to form a catalytic film and trigger subsequent electroless plating

Method used

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  • Activation method before flexible backing material chemical plating based on numerator self-assembly technique
  • Activation method before flexible backing material chemical plating based on numerator self-assembly technique
  • Activation method before flexible backing material chemical plating based on numerator self-assembly technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The present embodiment adopts nylon 66 textile as the base material, and the activation steps are as follows:

[0044] 1. Configure chitosan finishing solution

[0045] Working fluid formula:

[0046]

[0047] The chitosan finishing solution was obtained after electromagnetic stirring for 30 minutes at room temperature and standing for another 3 hours.

[0048] 2. Treat the fabric with a chitosan finishing solution under electromagnetic stirring for 30 minutes, at a temperature of 60° C., wash with deionized water, and dry.

[0049] 3. The fabric with the chitosan carrier layer was placed in a 30 ppm palladium chloride activation solution, treated at 20° C. for 20 minutes, washed twice with deionized water, and dried.

[0050] After the nylon 66 textile is treated with electroless nickel-phosphorus alloy, an electromagnetic shielding material is obtained. The measured surface resistance value of the material is 0.1-0.2Ω / □, the shielding efficiency is 35dB, and the ...

Embodiment 2

[0052] This embodiment uses polyester primary color fabric as the base material, and the activation steps are as follows:

[0053] 1. Configure chitosan finishing solution

[0054] Working fluid formula:

[0055]

[0056] The chitosan finishing solution was obtained after electromagnetic stirring for 30 minutes at room temperature and standing for another 3 hours.

[0057] 2. Immerse the fabric in the chitosan finishing solution for 5 minutes at a pressure of 3kg / cm 2 Under the condition of two dips and two rollings, drying at 100°C for 5 minutes and at 145°C for 30 minutes.

[0058] 3. Put the fabric with the chitosan carrier layer in 20ppm palladium chloride activation solution, stir electromagnetically for 15 minutes at 20°C, and bake at 140°C for 30 minutes.

[0059] After the polyester primary color fabric is treated with electroless nickel-phosphorus alloy, an electromagnetic shielding material is obtained. The measured surface resistance value of the material is 0...

Embodiment 3

[0061] This embodiment uses polyester black fabric as the base material, and the activation steps are as follows:

[0062] 1. Configure chitosan finishing solution

[0063] Working fluid formula:

[0064]

[0065] The chitosan finishing solution was obtained after electromagnetic stirring for 30 minutes at room temperature and standing for another 3 hours.

[0066] 2. Immerse the fabric in the chitosan finishing solution for 10 minutes at a pressure of 2kg / cm 2 Under the condition of two dips and two rollings, drying at 100°C for 5 minutes and at 145°C for 30 minutes.

[0067] 3. Put the fabric with the chitosan carrier layer in 35ppm palladium chloride activation solution, stir electromagnetically for 35 minutes at 20°C, and bake at 120°C for 40 minutes.

[0068] After the polyester black fabric is treated with electroless nickel-phosphorus alloy, an electromagnetic shielding material is obtained. The measured surface resistance value of the material is 0.2-0.3Ω / □, the ...

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Abstract

The invention provides a molecular self-assembly technique based method for pre-activating a flexible base material before chemical plating, comprising the following steps of: 1. placing a crosslinking agent and chitosan or derivative thereof into a weak acidic aqueous solution, with electromagnetical stirring and keeping the solution stand to obtain a chitosan finishing liquid; 2. impregnation method: impregnating a fabric in the chitosan finishing liquid with electromagnetical stirring; cleaning the fabric with deionized water and drying the fabric; a padding method: impregnating the fabric in the chitosan finishing liquid, and carrying out impregnating and padding twice with a padder as well as pre-drying and baking to the fabric; 3. placing the fabric in an activation solution with palladium chlonde; route 1: activating, cleaning with the deionized water and drying; route 2: stirring electromagnetically or keeping stand, and baking. The method has the advantages of improving friction performance, ensuring all mechanical properties and even distribution of the activated layer on the surface of the fabric, improving the problems of severe environment pollution caused by the prior activation process and having stronger catalytic activity, wide application, simple operation, low cost and excellent activation effect, and has an important practical meaning for preparing flexible electromagnetic shielding materials.

Description

technical field [0001] The invention relates to a method for activating a flexible substrate before electroless plating based on molecular self-assembly technology, and belongs to the fields of interface chemistry and catalysis, and functional finishing of metallized textiles. Background technique [0002] In 2000, the State Economic and Trade Commission issued a document No. [189], requiring that personnel in contact with electronic appliances be equipped with protective equipment; on August 6, 2001, the China Consumers Association issued a warning to consumers that electromagnetic radiation must be prevented in life. Therefore, the preparation of electromagnetic shielding materials has become a research hotspot, and it is also a technical problem that must be overcome. [0003] At present, this material mainly forms a metal composite layer on the surface of the fiber by chemical plating or sputtering technology. Among them, the electroless plating method has become the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/30
Inventor 王炜马跃辉孙宾朱美芳
Owner DONGHUA UNIV
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