Atomizing activating process for electroless plating on water-absorbing substrate surface

A water-absorbing, electroless plating technology, applied in the field of electroless plating, can solve the problems of a large amount of waste liquid, easy pollution of activation liquid, cumbersome operation, etc., and achieve the effects of stable activation liquid, saving activation liquid, and less consumption

Inactive Publication Date: 2008-03-12
NANJING ZHONGDA QINGSHAN ELECTRIC VEHICLE
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the non-metal substrate, especially the water-absorbing non-metal substrate, is cumbersome to operate, the activation solution is easily polluted, and a large amount of waste liquid is produced in the activation process before the electroless plating. Spray Activation Method of Electroless Plating on Substrate Surface

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Atomizing activating process for electroless plating on water-absorbing substrate surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1). Substrate pretreatment: the outer diameter is 1.2cm, the inner diameter is 0.8cm, the length is 10cm, and the water absorption is 460ml / m 2 The porous ceramic tubes were washed with commercially available detergent solution, tap water, and deionized water in sequence, and dried.

[0025] (2). Preparation of activation solution: 0.1gPdCl 2 Add it into 10ml of deionized water, oscillate ultrasonically for 10min, add 40ml of 1M NaOH solution, continue ultrasonically oscillating for 2 hours, and finally obtain a brown-black colloid, in which the palladium content is about 0.01mol / L.

[0026] (3). Activation of the substrate: Spray the activation solution on the outer surface of the ceramic tube with a nitrogen gas flow atomizer (gas pressure 0.2Mpa, nozzle aperture 0.5mm), and rotate the ceramic tube at the same time until the surface presents a uniform brown Yellow (as shown in Figure 1). After drying in the air, place it in a hydrazine solution with a concentration...

Embodiment 2

[0029] (1). The pretreatment of the matrix and the preparation of the activation solution are the same as the steps (1) and (2) of Example 1.

[0030](2). Activation of the substrate: Spray the activation liquid on the outer surface of the ceramic tube with an air flow atomizer (gas pressure 0.4Mpa, nozzle aperture 0.8mm), dry it and place it at 40°C with a concentration of 0.1M hydrazine solution for 5 minutes.

[0031] (3). Electroless silver plating. The composition of the silver plating solution is: 5g / L AgNO 3 , 500ml / L concentrated ammonia water, 35g / L disodium edetate, the coating temperature is 30℃, the reducing agent is 0.5M N 2 h 4 . The prepared silver film is shown in Figure 4.

Embodiment 3

[0033] (1). The pretreatment of the matrix, the preparation of the activation solution and the activation of the matrix are the same as the steps (1) and (2) of Example 1.

[0034] (2). Activation of the substrate: Use an argon gas flow atomizer (gas pressure 0.2Mpa, nozzle aperture 0.5mm) to evenly spray palladium hydroxide colloid on the surface of the substrate, and dry it at 200°C under a hydrogen atmosphere Restore for 5 minutes.

[0035] (3). Electroless nickel plating. The composition of the nickel plating solution is: 30g / L NiSO 4 ·6H 2 O, 250ml / L concentrated ammonia water, the coating temperature is 60°C, and the reducing agent is 0.5M N 2 h 4 . The prepared nickel film is shown in Figure 5.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
water absorptionaaaaaaaaaa
water absorptionaaaaaaaaaa
water absorptionaaaaaaaaaa
Login to view more

Abstract

The invention relates to an activating process before chemical plating any hydroscopic substrate. Some activating solution containing palladium salt is evenly sprayed on a pretreated substrate surface by high-pressure atomizing or air-flow atomizing method, then metallic palladium particles are obtained by reduction treatment and used as a catalyst to activate the substrate surface. The palladium salt deposited on the substrate surface can be reduced into metallic palladium particles by hydrogen or diamine solution and used as a reaction catalyst for chemical plating. The invention is easy to operate, of low cost, and almost generates no waste liquid during operation; the activating liquid is steady and can be kept for a long term; nanometer metallic palladium particles will generate after activation, and the catalysis activity is high.

Description

technical field [0001] The invention relates to an activation technology before electroless plating on the surface of a non-metal substrate, especially a water-absorbing substrate, which is used for electroless plating to obtain a uniform metal plating layer. Background technique [0002] Electroless plating is a common technique for preparing a thin metal layer on the surface of a base material, especially a non-conductive base material. Instead of using an electric current, it uses a reducing agent to reduce the metal ions in the solution to form a metal coating. Its biggest feature is that there is a coating of similar thickness where the substrate touches the plating solution, and the coating has a good appearance, compactness and corrosion resistance. Common electroless plating metal layers include nickel, copper, silver, gold, platinum, cobalt, nickel-boron alloy, nickel-phosphorus alloy, etc. The advantages of electroless plating are: simple process, low cost, less i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/30B05D7/24B01J23/44
Inventor 黄彦范菁菁俞健胡小娟
Owner NANJING ZHONGDA QINGSHAN ELECTRIC VEHICLE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap