Carbon nanotube conductive ball as well as preparation method and application thereof

A technology of carbon nanotubes and conductive balls, which is applied in the field of conductive adhesives, can solve problems such as carbon nanotube detachment and reduced conductivity, and achieve the effects of improving conductivity, reducing risks, and reducing puncture risks

Inactive Publication Date: 2017-12-01
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the carbon nanotube conductive balls currently used are generally directly coated with carbon nanotubes on the cue ball. When applied to conductive adhesives, due to the viscosity of the adhesive, the carbon nanotubes are easy to detach from the cue ball, resulting in conductive Performance drop

Method used

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  • Carbon nanotube conductive ball as well as preparation method and application thereof

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Effect test

Embodiment 1

[0033] A carbon nanotube conductive ball, the conductive ball has a core-shell structure, wherein the core is a silicon ball with a diameter of 2 μm, and the shell layer is polyethylene doped with carbon nanotubes.

[0034] Its preparation method is as follows:

[0035] Provide carbon nanotubes with a length of 15-20um and a diameter of 1-2nm, polyethylene, and silicon spheres with a diameter of 2μm.

[0036] Heat polyethylene above its melting point to make it flow, and then disperse carbon nanotubes in polyethylene according to the mass ratio of carbon nanotubes and polyethylene at a ratio of 1:99. In this process, stirring is used to accelerate carbon Dispersion of nanotubes in polyethylene, finally prepared polyethylene doped with 1wt% carbon nanotubes.

[0037] Maintain the heating state, mix the polyethylene doped with carbon nanotubes and cue balls according to the mass ratio of 0.5:1, stir to disperse the cue balls evenly, and after standing for a period of time, disc...

Embodiment 2

[0039] A carbon nanotube conductive ball, the conductive ball has a core-shell structure, wherein the core is a polymer microsphere with a diameter of 10 μm, and the shell layer is polyvinyl chloride doped with carbon nanotubes.

[0040] Its preparation method is as follows:

[0041] Carbon nanotubes with a length of 20-25 μm and a diameter of 1.5-2 nm, polyvinyl chloride, and polymer microspheres with a diameter of 10 μm are provided.

[0042] Heat polyvinyl chloride above its melting point to make it flow, carbon nanotubes are pre-acidified, and then carbon nanotubes and polyvinyl chloride are dispersed in polyvinyl chloride according to the mass ratio of 20:80. In vinyl chloride, stirring is used to accelerate the dispersion of carbon nanotubes in polyvinyl chloride during this process, and finally polyvinyl chloride doped with 20 wt% carbon nanotubes is obtained.

[0043] Maintain the heating state, mix the polyvinyl chloride doped with carbon nanotubes with the cue ball ...

Embodiment 3

[0045] A carbon nanotube conductive ball, the conductive ball has a core-shell structure, wherein the core is a silicon ball with a diameter of 20 μm, and the shell layer is polypropylene doped with carbon nanotubes.

[0046] Its preparation method is as follows:

[0047] Carbon nanotubes with a length of 15-20 μm and a diameter of 1-2 nm, polypropylene, and silicon spheres with a diameter of 20 μm were provided.

[0048] Heating the polypropylene above its melting point to make it flow, the carbon nanotubes are pre-aminated, and then the carbon nanotubes and polypropylene are dispersed in the polypropylene according to the mass ratio of 15:85. In this process, ultrasound is used to accelerate the dispersion of carbon nanotubes in polypropylene, and finally polypropylene doped with 15wt% carbon nanotubes is obtained.

[0049] Maintain the heating state, mix the polypropylene doped with carbon nanotubes with the cue ball at a mass ratio of 0.2:1, stir to help it disperse evenly,...

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Abstract

The invention provides a carbon nanotube conductive ball as well as a preparation method and application thereof. The preparation method comprises the steps that carbon nanotubes are firstly mixed with a thermoplastic resin to obtain a carbon nanotube-doped thermoplastic resin, and then the carbon nanotube-doped thermoplastic resin is used to cove mother balls to prepare the carbon nanotube conductive ball. The carbon nanotube conductive ball can reduce the risk of ACP or ACA / ACF level conduction when the carbon nanotube conductive ball is applied to anisotropic conductive adhesive.

Description

technical field [0001] The invention belongs to the technical field of conductive adhesives, and relates to a carbon nanotube conductive ball and a preparation method and application thereof. Background technique [0002] At present, in the liquid crystal display (LCD) industry, anisotropic conductive adhesive (ACP / ACA) or anisotropic conductive film (ACF) is widely used, and it is often used in integrated circuit chips (IC chips) and glass substrates The conduction of the upper ITO electrode, the conduction of the upper and lower substrates, and the conduction of electronic components and circuit substrates. Anisotropic conductive adhesive / film does not contain lead and other toxic metals, is a green electronic packaging material, and is suitable for ultra-fine pitches, has a low curing temperature, and the interconnection process is simple. Widely used in IC packaging. In particular, many electronics have long used liquid crystal displays as the interface for man-machine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/04C09J11/08C09J9/02
CPCC09J11/04C08K7/24C08K2201/001C08K2201/003C08K2201/004C08K2201/011C08K2201/016C09J9/02C09J11/08
Inventor 李明辉王海军胡韬李泳锐
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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