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Method for coating polymeric microsphere with carbon nano tube

A technology of carbon nanotubes and polymers, applied in the direction of coating, etc., can solve the problems of high price, complicated equipment, shortage of resources, etc., and achieve the effect of low cost, simple preparation process and environmental friendliness

Active Publication Date: 2016-05-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a method for carbon nanotube-coated polymer microspheres, which has simple preparation process and equipment, high efficiency and low cost, and the obtained carbon nanotube-coated polymer microspheres have better electrical conductivity It solves the problems of shortage of resources, high price and complicated equipment in the preparation of conductive microspheres from the existing metal nickel (Ni), gold (Au) and gold plating on nickel.

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  • Method for coating polymeric microsphere with carbon nano tube
  • Method for coating polymeric microsphere with carbon nano tube
  • Method for coating polymeric microsphere with carbon nano tube

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In the present embodiment, the method of carbon nanotube coating polymer microsphere is as follows:

[0032] 1) Using sodium lauryl sulfate to disperse single-walled carbon nanotubes in deionized water under the action of ultrasonic waves, and then centrifuge to obtain the supernatant to obtain a single-walled carbon nanotube dispersion with a concentration of 0.1 mg / ml.

[0033] 2) Add polystyrene and polymethyl methacrylate composite microspheres with a diameter of 5 μm into the single-walled carbon nanotube dispersion and mix evenly. The mass ratio of composite microspheres to carbon nanotubes is 500:3. The mass ratio of polystyrene to polymethyl methacrylate in the ball is 1:1.

[0034] 3) Centrifuge the mixed solution at a speed of 10,000 r / min for 30 minutes, remove the upper dispersion liquid, and obtain polymer microspheres coated with single-walled carbon nanotubes.

[0035] 4) Washing the obtained microspheres with deionized water and ethanol in turn to remov...

Embodiment 2

[0038] The difference from Example 1 is that the method of coating polymer microspheres with carbon nanotubes in this example is as follows:

[0039] 1) Using sodium lauryl sulfate to disperse the double-walled carbon nanotubes in deionized water under the action of ultrasonic waves, and then take the supernatant through centrifugation to obtain a double-walled carbon nanotube dispersion with a concentration of 0.025 mg / ml.

[0040] 2) Add polyethylene microspheres with a diameter of 0.5 μm into the double-walled carbon nanotube dispersion and mix evenly, and the mass ratio of polyethylene microspheres to carbon nanotubes is 500:3.

[0041] 3) Centrifuge the mixed solution at a speed of 2000 r / min for 10 minutes, remove the upper dispersion liquid, and obtain polyethylene microspheres coated with carbon nanotubes.

[0042] 4) Wash the obtained microspheres with deionized water, isopropanol, and a mixed solvent with a volume ratio of water and isopropanol of 2:1 in sequence to ...

Embodiment 3

[0045] The difference from Example 1 is that the method of coating polymer microspheres with carbon nanotubes in this example is as follows:

[0046] 1) Use sodium dodecylsulfonate to disperse multi-walled carbon nanotubes with a diameter of 20nm in deionized water under the action of ultrasonic waves, and then take the supernatant through centrifugation to obtain multi-walled carbon nanotubes with a concentration of 0.1mg / ml nanotube dispersion.

[0047] 2) Add polypropylene microspheres with a diameter of 5 μm into the multi-walled carbon nanotube dispersion and mix evenly. The mass ratio of polypropylene microspheres to carbon nanotubes is 500:3.

[0048] 3) Centrifuge the mixed solution at a rotational speed of 5000 r / min for 20 minutes, remove the upper dispersion liquid, and obtain polymer microspheres coated with multi-walled carbon nanotubes.

[0049] 4) Washing the obtained microspheres with ethanol and deionized water in turn to remove excess surfactant.

[0050] 5...

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Abstract

The invention relates to the field of anisotropy conductive adhesives, in particular to a method for coating a polymeric microsphere with a carbon nano tube. The method comprises the steps that the outer surface of the polymeric microsphere is coated with the carbon nano tube through carbon nano tube dispersion liquid, and the method is applicable to preparation of conductive particles in anisotropy conductive adhesives. The method mainly comprises the steps that the carbon nano tube dispersion liquid is prepared through a surface active agent; 2, the polymeric microsphere is placed into the obtained carbon nano tube dispersion liquid to be mixed to form a mixed solution; 3, centrifugal separation is carried out to remove redundant carbon nano tube dispersion liquid; 4, a water washing or solvent cleaning method is utilized for removing residual surface active agent; 5, drying is performed to obtain a polymeric microsphere powder sample evenly coated with the carbon nano tube is obtained. The technology is simple, rapid and efficient, and the problems of resource shortage, the high cost, complex equipment and the like existing in the existing method of preparing a conductive microsphere from metallic nickel (Ni), gold (Au), nickel coated with gold and other materials are solved.

Description

technical field [0001] The invention relates to the field of anisotropic conductive adhesives, in particular to a method for coating polymer microspheres with carbon nanotubes, using a carbon nanotube dispersion to wrap carbon nanotubes on the outer surface of polymer microspheres, which is suitable for isotropic conductive adhesives. Preparation of Conductive Particles in Square Conductive Adhesive. Background technique [0002] Anisotropic conductive adhesives are widely used in packaging and bonding of various electronic components and components such as displays. Compared with traditional tin-lead solder, anisotropic conductive adhesive has many advantages, such as: lead-free, low bonding temperature, high fatigue resistance and flexibility, can connect some non-solderable substrates, simple equipment, low cost Low. [0003] The anisotropic conductive adhesive is mainly composed of conductive particles and colloids, and the conductive particles are usually formed by pl...

Claims

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Application Information

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IPC IPC(8): C08J7/06C08J7/00C08L25/06C08L33/12C08L23/12C08L23/06C08K7/24
Inventor 杜金红张鼎冬刘海超任文才成会明胡韬李泳锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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