Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing polymer conductive microspheres for anisotropic conductive adhesive film by dopamine

A conductive adhesive film and anisotropic technology, applied in the field of conductive adhesive, can solve the problems of complex film forming process and unstable anisotropic conductive performance, and achieve simple reaction conditions, excellent anisotropic conductive performance, and simple steps Effect

Active Publication Date: 2017-04-05
BEIJING UNIV OF CHEM TECH
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has the disadvantages of complex film forming process and unstable anisotropic conductivity.

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
  • A method for preparing polymer conductive microspheres for anisotropic conductive adhesive film by dopamine
  • A method for preparing polymer conductive microspheres for anisotropic conductive adhesive film by dopamine
  • A method for preparing polymer conductive microspheres for anisotropic conductive adhesive film by dopamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Place 2 g of polystyrene microspheres with a diameter of 4 microns in a dopamine solution with a mass concentration of 2 g / L and use deionized water as a solvent, react at a stirring speed of 60 rpm for 24 hours under normal temperature conditions, and stir After the end, the polystyrene microspheres deposited with polydopamine were sucked out, washed with distilled water, and dried in vacuum;

[0025] 2) be prepared as gold plating solution: the mass concentration of chloroauric acid is 30g / L in this gold plating solution, the mass concentration of citric acid is 60g / L, the mass concentration of disodium hydrogen phosphate is 10g / L, the mass concentration of ammonium chloride 40g / L, the above-mentioned substances are fully mixed and dissolved in deionized water to obtain a gold plating solution;

[0026] 3) Place the polystyrene microspheres with polydopamine deposited on the surface prepared in step 1) in the gold plating solution prepared in step 2), react at 50°C...

Embodiment 2

[0034] The process is the same as in Example 1, and the reaction time in step 3) is changed to 5 minutes to obtain gold-plated polystyrene microspheres.

[0035] It has been determined that the gold element content on the surface of the gold-plated polystyrene microspheres is 1.45% by weight.

Embodiment 3

[0037] The process is the same as in Example 1, and the reaction time in step 3) is changed to 30 minutes to obtain gold-plated polystyrene microspheres.

[0038] It is determined that the gold element content on the surface of the gold-plated polystyrene microspheres is 2.95% by weight.

[0039] Different gold-plating times have a certain influence on the gold element content on the surface of the gold-plated polystyrene microspheres. According to Examples 1-3, when the gold-plated time is 10 minutes, the surface gold element content of the gold-plated polystyrene microspheres is the highest.

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
diameteraaaaaaaaaa
glass transition temperatureaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing polymer conductive microspheres for an anisotropic conductive adhesive film from dopamine. The method comprises that dopamine is deposited on the surface of a polymer matrix under the alkaline conditions, the polymer matrix of which the surface is functionalized by polydopamine is placed into a gold plating liquid so that a compact and continuous gold plating layer is formed, dopamine is deposited on the surface of the polymer subjected to gold plating, and an oxirene-based resin insulating layer is formed on the outer layer of the matrix subjected to gold plating by polydopamine effects on an epoxy group and an esterification reaction between the epoxy group and acrylic acid. The method has simple processes and can form the compact and continuous gold plating layer and a uniform insulating layer. The polymer conductive microspheres can produce insulating layer breaking under the bonding hot pressing conditions, and the inner core matrix produces plastic deformation so that conductive particles contact with an electrode along a pressing direction and thus the anisotropic conductive adhesive film forms a conductive loop along a hot pressing direction and has electric insulativity along other directions.

Description

technical field [0001] The invention provides a method for preparing polymer conductive microspheres for anisotropic conductive adhesive film, and specifically relates to the preparation of using polydopamine to coat a gold element metal coating on the outside of a substrate, and coating an insulating layer on the outside of the coating. A method for layer-structured conductive particles, in particular to a method for preparing polystyrene (PS) / gold / epoxy vinyl resin insulating layer composites by surface functionalization with dopamine. Background technique [0002] Anisotropic conductive film ACF (anisotropic conductive film) is a new type of composite bonding material formed by uniformly dispersing conductive particles (metal particles or conductive composite particles) into the adhesive. Achieved. Carbon fibers are used as conductive particles of ACF materials, which are then replaced by lead-free solder and metal microspheres, such as Ni, Ag, Ni / Au microspheres, etc. ...

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): C23C18/42C09J9/02B32B1/00
CPCB32B1/00C09J9/02C23C18/42
Inventor 王文才李颖颖邹华张立群郝明正田明
Owner BEIJING UNIV OF CHEM TECH