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Particle-free nickel-based conductive ink and preparation method thereof

A particle-free, conductive ink technology, used in replication/marking methods, inks, printing, etc., can solve the problems of expensive conductive silver ink, low electron mobility, easy oxidation of thin film air, and achieve good adhesion and preparation. The effect of simple process and excellent conductivity

Active Publication Date: 2021-03-19
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a particle-free nickel-based conductive ink and a preparation method thereof, so as to solve the shortcomings of the existing particle-free conductive ink suitable for printed electronics technology, such as conductive silver ink High price, low electron mobility, thin film prepared by copper ink is easy to oxidize in the air and other technical problems

Method used

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  • Particle-free nickel-based conductive ink and preparation method thereof
  • Particle-free nickel-based conductive ink and preparation method thereof
  • Particle-free nickel-based conductive ink and preparation method thereof

Examples

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Embodiment 1

[0050] This embodiment provides a kind of highly stable particle-free nickel-based conductive ink, containing 20% ​​nickel acetate (nickel precursor), 18% ammonia (complexing agent), 2% formaldehyde (reducing agent), 0.1% carboxymethyl Sodium cellulose (organic additive), 0.001% polyvinylpyrrolidone (organic additive), 0.001% gelatin (organic additive), 0.001% Tegoerbyk-1802tps (organic additive), and the balance is ethanol. The preparation method is:

[0051] Dissolve ammonia water in ethanol according to the above ratio, mix well, then add nickel acetate into the mixed solution, stir at 20°C for 3 hours until dissolved, then add formaldehyde and organic additives until completely dissolved. The highly stable particle-free nickel-based conductive ink of this embodiment was obtained by filtration through a microporous membrane (pore diameter of 0.22 μm), with a viscosity of 1.9 mPa·s and a surface tension of 30 mN / m.

[0052] Take 400 μL of the ink and spin-coat it on a 2cm*2...

Embodiment 2

[0054] This embodiment provides a kind of highly stable particle-free nickel-based conductive ink, containing 35% nickel oxalate (nickel precursor), 26% ethylamine (complexing agent), 2% glycerol (reducing agent), 0.02% Phenolic resin (organic additive), 0.001% polyvinylpyrrolidone (organic additive), 0.001% methylcellulose (organic additive), 0.001% DISPERBYK-2015 (organic additive), and the balance is ethanol. The preparation method is:

[0055] Dissolve ethylamine in ethanol according to the above ratio, mix well, then add nickel oxalate into the mixed solution, stir at 20°C for 3 hours until dissolved, then add glycerol and organic additives until completely dissolved. The highly stable particle-free nickel-based conductive ink of this embodiment was obtained by filtration through a microporous membrane (0.22 μm), with a viscosity of 1.4 mPa·s and a surface tension of 24 mN / m.

[0056] Take 400 μL of the ink and spin-coat it on a 2cm*2cm glass substrate. The suspension co...

Embodiment 3

[0058] This embodiment provides a kind of highly stable particle-free nickel-based conductive ink, containing 40% nickel acetate (nickel precursor), 38% isopropylamine (complexing agent), 7% ethylene glycol (reducing agent), 0.02% Polyvinylpyrrolidone (organic additive), 0.001% agar (organic additive), 0.001% urea (organic additive), 0.001% DISPERBYK-2015 (organic additive), and the balance is ethanol. The preparation method is:

[0059] Dissolve isopropylamine in ethanol solution according to the above ratio, mix well, then add nickel acetate into the mixture, stir at 20°C for 2 hours until dissolved, then add ethylene glycol and organic additives until completely dissolved. The highly stable particle-free nickel-based conductive ink of this embodiment was obtained by filtration through a microporous membrane (0.22 μm), with a viscosity of 3.4 mPa·s and a surface tension of 34 mN / m.

[0060] Take 400 μL of the ink and spin-coat it on a 2cm*2cm glass substrate. The parameters...

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Abstract

The invention relates to particle-free nickel-based conductive ink, which comprises 5-40% of a nickel precursor, 10-55% of a chelating agent or complexing agent, 0-10% of a reducing agent, 0.001-10% of an organic additive and the balance of a solvent, wherein the chelating agent or the complexing agent is ammonia or an amine compound. The particle-free nickel-based conductive ink provided by the invention fills the blank of nickel-based particle-free conductive ink in printed electronics. A nickel-gold film formed by the nickel-based conductive ink has the same order of magnitudes of conductivity as a silver conductive film, but only has about 2% of the cost of the silver conductive ink, has better oxidation resistance, corrosion resistance, mechanical strength and the like compared with acopper conductive film, and can be dried and decomposed in the air. The resistivity of the metallic nickel conductive layer formed on the substrate is 22-500 [mu]ohm.cm, the adhesiveness between themetallic nickel conductive layer and the substrate is good, no nickel film falls off after the metallic nickel conductive layer is torn off by 3M and 600M adhesive tapes, and no obvious damage is caused to the film after the metallic nickel conductive film generated on the flexible substrate is bent for 50 times.

Description

technical field [0001] The invention relates to the technical field of conductive ink, in particular to a particle-free nickel-based conductive ink for printed electronics and a preparation method thereof. Background technique [0002] As a technology with high precision, strong stability, fast printing speed, wide selection of substrates, green environmental protection, flexibility and large-area manufacturing, printed electronics technology has gradually become an important innovation in the field of microelectronics. The traditional etching method not only has serious material waste and complicated preparation process, but also has problems such as high cost and serious environmental pollution. As the core of printed electronics technology, the preparation and application of functionalized conductive inks have received extensive attention. The currently reported conductive inks are mainly silver and copper inks: although silver has the advantages of high conductivity and...

Claims

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Application Information

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IPC IPC(8): C09D11/52B41M5/00B41M7/00B05D5/12B05D7/24
CPCC09D11/52B41M5/0023B41M7/009B05D5/12B05D7/24
Inventor 李晓东谢望
Owner NORTHEASTERN UNIV
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