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Preparation method for plating silver on surface of hollow glass bead

A technology of hollow glass microspheres and silver plating, which is applied in the field of conductive filler preparation, can solve the problems of uneven plating silver layer and easy falling off, and achieve the effect of good plating effect, good performance and uniform plating layer

Inactive Publication Date: 2020-07-07
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation method for silver-plating on the surface of hollow glass microspheres, which solves the problem that the silver-plated layer is uneven and easy to fall off in the existing silver-plating method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] A method for preparing silver-plated hollow glass microspheres of the present invention comprises the following steps:

[0035] Step 1, pretreatment of hollow glass microspheres

[0036] Step 1.1, deoiling treatment: take some hollow glass microspheres, place them in an ethanol aqueous solution (obtained by mixing absolute ethanol and deionized water with a volume ratio of 1:3) and ultrasonically treat at 80 Hz for 15-20 min, then wash with water and suction filter for 2- 3 times; followed by alkali washing in 2% NaOH solution, ultrasonic treatment for 15-20min, washing with water and suction filtration until neutral;

[0037] Through the degreasing treatment, the surface of the glass microspheres can be cleaned and degreased; because the hollow glass microspheres are made of special oil, there are a lot of oil stains on the surface, and ethanol, as a good organic solvent, can remove most of the oil stains, ensuring The surface of hollow glass microspheres is clean; so...

Embodiment 1

[0051] Step 1: First weigh 10g of hollow glass microspheres (11g considering the loss during the experiment), put them into ethanol aqueous solution (80ml of absolute ethanol, 240ml of deionized water) and mix thoroughly, and perform 80Hz ultrasonic treatment (stirring with glass rod) for 15min , and then carry out water washing and suction filtration twice; then put into 2% NaOH solution (6gNaOH solid, 300g deionized water) for alkali washing, ultrasonic treatment (glass rod stirring) for 15min, water washing and suction filtration three times, and the pH reaches neutral.

[0052] Prepare a mixed solution of hydrofluoric acid with a mass fraction of 1% and 10g / L sodium fluoride solution, weigh 1g of hydrofluoric acid, dilute it to 200ml with deionized water, weigh 2g of sodium fluoride, and dissolve it in the solution Then fully mix with the glass microspheres after degreasing treatment, carry out magnetic stirring at room temperature for 10 min, and then wash with deionized w...

Embodiment 2

[0059] Step 1: First weigh 10g of hollow glass microspheres (taking 11g in consideration of the loss during the experiment), put them into an aqueous ethanol solution (80ml of absolute ethanol, 240ml of deionized water) and mix thoroughly, perform ultrasonic treatment (stirring with a glass rod) for 15min, Then carry out water washing and suction filtration twice; then put into 2% NaOH solution (6gNaOH solid, 300g deionized water) for alkali washing, ultrasonic treatment (glass rod stirring) for 15min, water washing and suction filtration three times, and the pH reaches neutral.

[0060] Prepare a mixed solution of hydrofluoric acid with a mass fraction of 1% and 10g / L sodium fluoride solution, weigh 1g of hydrofluoric acid, dilute it to 200ml with deionized water, weigh 2g of sodium fluoride, and dissolve it in the solution Then fully mix with the glass microspheres after degreasing treatment, carry out magnetic stirring at room temperature for 10 min, and then wash with deion...

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Abstract

The invention discloses a preparation method for plating silver on the surface of a hollow glass bead. The preparation method comprises the following steps of mixing an ethanol solution and an alkaline solution to treat the surface of the hollow glass bead, then putting into a SnCl2 solution for surface sensitization treatment, and then putting into a prefabricated silver-ammonia solution activation solution for full reaction, the reducing solution being a mixed solution of glucose and tartaric acid, directly adding the reducing solution into the activation solution to enable Ag<+> in the activation solution to completely react, and then dropwise adding a silver ammonia solution oxidation solution for chemical silver plating. According to the preparation method, expensive and toxic PbCl2 is not selected as an activating agent, and the silver-ammonia solution is adopted as the activating agent, so that the cost is saved, the utilization rate of Ag is increased, and the purpose of protecting the environment is achieved; and the prepared silver-plated glass bead has a uniform and compact silver coating layer, is not easy to fall off, has excellent conductivity, and can be used in theindustry of electromagnetic shielding materials.

Description

technical field [0001] The invention belongs to the technical field of conductive filler preparation, and in particular relates to a preparation method for silver-plating the surface of hollow glass microspheres. Background technique [0002] At present, with the rapid development of science and technology, the increasingly serious electromagnetic radiation has brought safety hazards to human beings. As electromagnetic shielding materials suppress electromagnetic interference and reduce electromagnetic pollution, they are valued by the majority of material researchers. [0003] Metal conductive filler is currently the most commonly used conductive filler in electromagnetic shielding materials and conductive coatings. It has excellent electrical conductivity and good thermal conductivity; but it has the disadvantages of high density, poor dispersion, and easy sedimentation, which affects its storage and use performance. cannot meet the increasing needs of human beings. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/06C03C15/00C03C23/00
CPCC03C17/06C03C23/0075C03C15/00C03C23/00
Inventor 苏晓磊闫家琦刘毅
Owner XI'AN POLYTECHNIC UNIVERSITY
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