Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for stripping metallic thin film plated on surface of material

A metal film and peeling material technology, applied in the field of material surface treatment, can solve problems such as difficult peeling of metal film, and achieve the effects of good peeling effect, simple production and maintenance, and inhibition of damage

Inactive Publication Date: 2013-07-03
UNIV OF SCI & TECH BEIJING
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for stripping the metal film coated on the surface of the material, which solves the problem of difficult stripping of the metal film coated on the material 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] There are 10 pieces of 316L stainless steel sheet with an area of ​​1 square centimeter, the thickness of the Au film plated on it is 0.2 microns, and the steel ball with a diameter of 1mm is used as the cathode conductive medium. They are placed in the hanging basket together, and the molar concentration is In 0.0001M sodium hydroxide aqueous solution, with it as the cathode and titanium basket as the anode, the aqueous solution is electrolyzed under vibration conditions. The cathode current density is 90 A / m2. After 5 minutes, the Au film coated on the stainless steel substrate will evolve hydrogen at the cathode. Fall off from the substrate under the action of the Next, the peeled Au film was collected by filtration, and the stainless steel substrate was taken out, and washed with deionized water to obtain the Au film aggregate and the stainless steel substrate.

Embodiment 2

[0013] Multi-layer Ag / Er film coated on a glass plate with an area of ​​100 square centimeters. The single layer thickness of Ag and Er is 0.1 micron, and the total thickness is 1 micron. Place it in a sodium chloride solution with a molar concentration of 1M In the process, it is used as the cathode, combined with the graphite anode, and the electrolysis process is carried out in an aqueous solution at -3°C under stirring conditions. The cathode current density is 50 amperes / m². After 5 minutes, the glass plate is coated with multiple layers The structured Ag / Er film falls off the substrate under the effect of hydrogen evolution at the cathode. Next, the peeled metal film was collected by filtration, and the glass plate was taken out and washed with deionized water to obtain Ag / Er film aggregates and glass plate substrates.

Embodiment 3

[0015] A polyethylene film with an area of ​​4 square centimeters, the thickness of the Pt film plated on it is 0.5 microns, and it is placed in a potassium sulfate solution with a molar concentration of 0.005M, which is used as a cathode, combined with a platinum anode, in an aqueous solution The room temperature water electrolysis process was carried out in the process, the cathode current density was 3000 A / m2, and the Pt film coated on the polyethylene film fell off the polyethylene film under the effect of hydrogen evolution at the cathode after 10 minutes. Next, the peeled Pt was collected by filtration, and the polyethylene film was taken out, and washed with deionized water to obtain the Pt film aggregate and the polyethylene film.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for stripping a metallic thin film attached to the surface of a material, belonging to the technical field of surface treatment of materials. The method comprises the following steps that: a metallic thin film coated on the surface of a material is connected to a circuit and used as a negative electrode; the metallic thin film is coupled with a counter electrode, then driven by an external power supply and performed a brine electrolysis process in an electrolyte solution, so that a hydrogen evolution reaction is implemented on the metallic thin film, wherein the electric current density of the negative electrode is 30-3000 amperes / square meter, the molar concentration of an electrolyte is 0.0001-1M, and the temperature of the electrolyte solution is minus 5-90 DEG C; the metallic thin film is stripped from a matrix under a mechanical action caused by precipitated hydrogen, then a matrix material and the stripped metallic thin film are respectively collected; the electrolyte solution attached to the surfaces of the matrix material and the stripped metallic thin film are scoured off by water so as to obtain a matrix material and a metallic thin film bunch which are separated from each other. The method disclosed by the invention has the advantages of good metallic thin film stripping effect, small required equipment investment, simple production and maintenance, cleanness and speediness; and by using the method, the damage to a stripping process on the matrix material is avoided or inhibited.

Description

Technical field [0001] The invention belongs to the technical field of material surface treatment, and particularly relates to a method for peeling off a metal film attached to the surface of a material. Background technique [0002] Stripping off the metal film coated on the surface of the material is an important technology, which has a wide range of application requirements, such as metal resource recovery and scientific research. Conventional methods for peeling off the metal film plated on the surface of the material include mechanical peeling, introducing thermal stress by using temperature differences, physical separation after crushing, etching and dissolving, etc. However, the mechanical peeling method is often difficult to completely peel off the firmly attached metal film on the material surface, or cause damage to the substrate. However, the thermal stress method may cause damage to the matrix material that cannot withstand high or low temperatures. Etching and dis...

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 Patents(China)
IPC IPC(8): C25F5/00
Inventor 曹江利
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com