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Conductive ink and preparation method thereof

A conductive ink and ink technology, applied in the direction of ink, household utensils, applications, etc., can solve the problems of conductive filler aggregation and settlement, the impact of conductive ink conductivity, and increased economic costs

Pending Publication Date: 2021-05-11
广东粤港澳大湾区黄埔材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former will have a greater impact on the conductivity of the conductive ink, while the latter will greatly increase the economic cost
In addition, conductive inks are prone to aggregation and sedimentation of conductive fillers after being placed for a long time

Method used

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  • Conductive ink and preparation method thereof
  • Conductive ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of the conductive ink of the present embodiment is as figure 1 shown, including the following steps:

[0038] (1) Mix carbon nanotubes, thermoplastic polyurethane and an organic solvent, the concentration of carbon nanotubes in the mixed ink is 20mg / ml, and the carbon nanotubes are single-wall carbon nanotubes; the concentration of thermoplastic polyurethane is 20mg / ml, thermoplastic Polyurethane is aromatic polyurethane with a molecular weight of 10,000-500,000 Daltons; the organic solvent is N,N-dimethylformamide;

[0039] (2) Carry out high-speed dispersion treatment to the ink mixed in step (1), the rotating speed is 20000rpm, and the dispersion time is 3h;

[0040] (3) Perform high-speed centrifugation on the ink dispersed in step (2) at a speed of 10000 rpm for 5 minutes to remove carbon nanotubes not fixed by thermoplastic polyurethane to obtain the conductive ink.

Embodiment 2

[0042] The preparation method of the conductive ink of the present embodiment is as figure 1 shown, including the following steps:

[0043] (1) Mix carbon nanotubes, thermoplastic polyurethane and an organic solvent, the concentration of carbon nanotubes in the mixed ink is 50mg / ml, and the carbon nanotubes are single-wall carbon nanotubes; the concentration of thermoplastic polyurethane is 50mg / ml, thermoplastic Polyurethane is aromatic polyurethane with a molecular weight of 10,000-500,000 Daltons; the organic solvent is N,N-dimethylformamide;

[0044] (2) Carry out high-speed dispersion treatment to the ink mixed in step (1), the rotating speed is 30000rpm, and the dispersion time is 1h;

[0045](3) Perform high-speed centrifugation on the ink dispersed in step (2) at a speed of 5000 rpm for 10 minutes to remove carbon nanotubes not fixed by thermoplastic polyurethane to obtain the conductive ink.

Embodiment 3

[0047] The preparation method of the conductive ink of the present embodiment is as figure 1 shown, including the following steps:

[0048] (1) Mix carbon nanotubes, thermoplastic polyurethane and organic solvent, the concentration of carbon nanotubes in the mixed ink is 5mg / ml, and carbon nanotubes are single-wall carbon nanotubes; the concentration of thermoplastic polyurethane is 5mg / ml, thermoplastic Polyurethane is aromatic polyurethane with a molecular weight of 10,000-500,000 Daltons; the organic solvent is N,N-dimethylformamide;

[0049] (2) Carry out high-speed dispersion treatment to the ink mixed in step (1), the rotating speed is 10000rpm, and the dispersion time is 5h;

[0050] (3) Perform high-speed centrifugation on the ink dispersed in step (2) at a speed of 10000 rpm for 2 minutes to remove carbon nanotubes not fixed by thermoplastic polyurethane to obtain the conductive ink.

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Abstract

The invention discloses conductive ink and a preparation method thereof. The conductive ink prepared by using thermoplastic polyurethane as a dispersing agent of carbon nanotubes through simple high-speed dispersion and centrifugal treatment is single in formula component, relatively low in cost, good in dispersion effect and relatively excellent in long-term stability, the concentration of the conductive ink is hardly changed after the conductive ink can be placed at room temperature for 30 days or more, and the aggregation and sedimentation phenomena of the carbon nanotubes are avoided. The conductive ink disclosed by the invention does not need additional adding of other auxiliaries, and can ensure that the ink has good conductivity.

Description

technical field [0001] The invention relates to the technical field of conductive ink, in particular to a conductive ink and a preparation method thereof. Background technique [0002] Conductive ink can be printed on various non-conductive substrates to form specific printed circuits with excellent electrical conductivity. Conductive inks are usually mainly composed of conductive fillers, additives and solvents. The conductive fillers can usually be divided into three categories, namely metal conductive particles, inorganic carbon-based materials and organic conductive polymers. Metal particles have problems such as easy oxidation failure and complicated processing technology, while conductive polymers have problems such as poor conductivity and high cost. [0003] Carbon-based materials commonly used to prepare conductive inks mainly include graphite and carbon black, as well as emerging nanoparticle graphene and carbon nanotubes. Carbon nanotubes are one-dimensional nan...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/102C09D11/033
CPCC09D11/52C09D11/102C09D11/033
Inventor 秦泽昭张通李坤邱福林杨小牛
Owner 广东粤港澳大湾区黄埔材料研究院
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