Preparation method of nano-silver/carbon nanotube composite conductive ink

A carbon nanotube composite and conductive ink technology, which is applied in ink, household appliances, applications, etc., can solve the problems of unfavorable electronic product applications, large contact resistance, etc., and achieve the effect of improved conductivity, excellent conductivity, and improved overall performance

Inactive Publication Date: 2020-01-07
安徽映山红材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon nanotubes belong to the carbon system, and their own contact resistance is relatively large, which is not conducive to their application in electronic products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Specific steps are as follows

[0032] (1) Acidification treatment of carbon nanotubes:

[0033] Add 0.5 parts of carbon nanotubes to a mixed solution of 13 parts of concentrated nitric acid and 39 parts of concentrated sulfuric acid, heat and stir in a water bath at 50-60°C for 2.5 hours; then wash and centrifuge with deionized water until the supernatant is neutral, and remove the lower layer of sediment , placed in a vacuum oven at 50°C to dry to constant weight, and ultrasonically dispersed in ethanol solution for later use.

[0034] (2) Synthesis of nano-silver carbon nanotube composite conductive filler:

[0035] Take 0.8 parts of silver nitrate in 50 parts of deionized water to prepare silver nitrate solution, add 1.2 parts of polyvinylpyrrolidone, add 10mL of acidified carbon nanotube ethanol solution, stir at 40-60°C for 20-30min to disperse evenly, record as A solution; take 1.5 parts of hydrazine hydrate and dissolve it in 50 parts of deionized water, and r...

Embodiment 2

[0039] Specific steps are as follows

[0040] (1) Acidification treatment of carbon nanotubes:

[0041] Add 0.7 parts of carbon nanotubes to a mixed solution of 18 parts of concentrated nitric acid and 54 parts of concentrated sulfuric acid, heat and stir in a water bath at 50-60°C for 2.5 hours; then use deionized water to wash and centrifuge until the supernatant is neutral, and remove the sediment from the lower layer , placed in a vacuum oven at 50°C to dry to constant weight, and ultrasonically dispersed in ethanol solution for later use.

[0042] (2) Synthesis of nano-silver carbon nanotube composite conductive filler:

[0043] Take 1.5 parts of silver nitrate in 50 parts of deionized water to prepare a silver nitrate solution, add 2 parts of polyvinylpyrrolidone, add 15mL of acidified carbon nanotube ethanol solution, stir at 40-60°C for 20-30min to disperse evenly, record as A solution; take 2.5 parts of hydrazine hydrate and dissolve it in 50 parts of deionized wate...

Embodiment 3

[0047] Specific steps are as follows

[0048](1) Acidification treatment of carbon nanotubes:

[0049] Add 1 part of carbon nanotubes to a mixed solution of 25 parts of concentrated nitric acid and 75 parts of concentrated sulfuric acid, heat and stir in a water bath at 50-60°C for 2.5 hours; then wash and centrifuge with deionized water until the supernatant is neutral, and remove the sediment from the lower layer , placed in a vacuum oven at 50°C to dry to constant weight, and ultrasonically dispersed in ethanol solution for later use.

[0050] (2) Synthesis of nano-silver carbon nanotube composite conductive filler:

[0051] Take 2 parts of silver nitrate in 50 parts of deionized water to prepare silver nitrate solution, add 2.5 parts of polyvinylpyrrolidone, add 10mL of acidified carbon nanotube ethanol solution, stir at 40-60°C for 20-30min to disperse evenly, record as A solution; take 3.7 parts of hydrazine hydrate and dissolve it in 50 parts of deionized water, and r...

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PUM

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Abstract

The invention discloses a preparation method of nano-silver / carbon nanotube composite conductive ink, belongs to the technical field of ink preparation. The preparation method comprises the followingsteps: introducing polar groups to the surfaces of carbon nanotubes, and ultrasonically dispersing the carbon nanotubes in ethanol to prepare a carbon nanotube ethanol solution; reducing and loading nano-silver on the prepared carbon nano-tubes to prepare a nano-silver / carbon nanotube conductive composite filler; and compounding the conductive filler, flaky nano-silver, urethane acrylate, epoxy acrylate, acrylate monomers and an auxiliary agent to prepare the nano-silver / carbon nanotube composite conductive ink. According to the preparation method disclosed by the invention, the carbon nanotubes are modified by the nano-silver, so the Van der Waals effect among the carbon nanotubes is reduced, and the agglomeration of the carbon nanotubes is limited; the modified carbon nanotubes play a role in stably dispersing the nano-silver in components, so agglomeration and flocculation of the nano-silver are inhibited; meanwhile, the nano-silver / carbon nanotube composite conductive filler is added, so the conductivity of the ink is improved, and the comprehensive performance of the ink is improved.

Description

technical field [0001] The invention belongs to the technical field of ink preparation, in particular to a preparation method of nano-silver carbon nanotube composite conductive ink. Background technique [0002] With the development of electronic information technology, traditional printing technology can no longer meet the requirements. More and more electronic printing technology is combined with electronic information technology to promote the development and innovation of printing technology. Conductive ink is the core part of electronic printing technology, which determines the quality of electronic printing technology. At present, the conductive inks on the market mainly include water-based conductive inks and solvent-based conductive inks. Both inks need to be sintered and cured before use. The sintering and curing takes a long time, and solvents are released during the curing process, which is not conducive to the concept of environmental friendliness. . CN 104668...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/03C09D11/101
CPCC09D11/03C09D11/101C09D11/52
Inventor 潘轸孙文李康朱满洲
Owner 安徽映山红材料科技有限公司
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