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Nano metal ink and preparation method thereof

A nano-metal and ink technology, applied in inks, household utensils, applications, etc., can solve problems such as excessive liquid volatilization, clogged nozzles, satellite spots, etc., and achieve the effects of reducing residue, easy dispersion, and easy removal

Inactive Publication Date: 2019-08-02
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The liquid components in nano-metal inks, such as the proportion of solvents and liquid additives, boiling point, viscosity and surface tension, have a very important impact on the performance of the ink. If the boiling point is too high, high temperature sintering is required after printing, which is not conducive to flexible electronic circuits. Manufacturing, and if there are too many residual solvents or additives, it will also affect the conductivity of the ink; if the boiling point is too low, the liquid will volatilize too quickly, and the solute will easily precipitate during inkjet printing and block the nozzle; if the viscosity and surface tension are not suitable, Satellite dots and other phenomena will also appear during inkjet printing
Existing nano-metallic inks have the above-mentioned problems more or less due to unreasonable selection of liquid components. For example, Chinese patent CN101812181A discloses a nano-silver dispersion and silver-spraying ink, which contains polyvinyl alcohol in its nano-silver dispersion. Stabilizers such as diethylene glycol or glycerin lead to a high sintering temperature, and the incomplete volatilization of the stabilizer adversely affects its electrical conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The nano metal ink provided by the present embodiment is prepared by the following method:

[0035] 60g methylcyclohexane, 3g 1-cyclohexyl-1-pentanol, 5g heptanoic acid were added in a 250ml round bottom flask and stirred for 30min, then adding 30g of oleylamine with a particle diameter of 3nm was the silver nanoparticles of ligand, and 2 g of nano-silver flakes with a thickness of 5 nm and a width of 30 nm with DMF as a ligand were stirred at room temperature for 30 min to obtain.

[0036] After testing, the viscosity of the nano metal ink prepared in this example is 3.5cP, the surface tension is 32.3mN / m, after inkjet printing on the glass substrate, sintering at 150°C for 5min, the volume resistivity is 10.1μΩ·cm.

Embodiment 2

[0038] The nano metal ink provided by the present embodiment is prepared by the following method:

[0039] Add 80g toluene, 15g terpineol, and 2g dodecylamine into a 250ml round-bottomed flask and stir for 30min. Adding 10g of oleylamine with a particle diameter of 5nm as a ligand, and 3g of silver particles with a thickness of 5nm and a width of 25nm Nano-silver flakes of DMF ligands were obtained by stirring at room temperature for 30 minutes.

[0040] After testing, the nano metal ink prepared in this example has a viscosity of 4.2cP and a surface tension of 34.1mN / m. After inkjet printing on a PET substrate and sintering at 150°C for 5min, the volume resistivity is 11.2μΩ·cm.

Embodiment 3

[0042] The nano metal ink provided by the present embodiment is prepared by the following method:

[0043] Add 94g of xylene, 2g of cyclohexyl alcohol, and 0.5g of oleic acid into a 250ml round-bottomed flask and stir for 30min, then add 2.9g of silver nanoparticles with a particle size of 10nm octadecadecanol as a ligand, and 0.6g of silver particles with a thickness of 20nm 1. The nano-silver flakes with a width of 100nm and DMF as a ligand are stirred at room temperature for 30min to obtain.

[0044] After testing, the nano-metallic ink prepared in this example has a viscosity of 2cP and a surface tension of 40.3mN / m. After inkjet printing on a glass substrate and sintering at 150°C for 5min, the volume resistivity is 17.0μΩ·cm

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Abstract

The invention relates to nano metal ink and a preparation method thereof. The nano metal ink is prepared from components in percentage by mass as follows: 3%-60% of conductive nano metal, 35%-94% of an organic solvent, 0.5%-15% of a stabilizer and 2%-40% of cycloalkane alcohol additives. The nano metal ink is prepared from organic acid with carbon atom number being 7-18 and / or organic amine as thestabilizer, the organic solvent and the cycloalkane alcohol additives by compounding, the viscosity range is 2 cP-10 cP, the surface tension is 25 mN / m-50 mN / m, and the nano metal ink is suitable forink-jet printing for film formation; the organic solvent, the stabilizer and the cycloalkane alcohol additives can be removed in a drying film formation process, residues are removed, the film formation is uniform, low-temperature sintering can be realized, volume resistivity is relatively low, and satellite points are avoided during ink-jet printing.

Description

technical field [0001] The invention relates to the technical field of inkjet printing, in particular to a nano metal ink and a preparation method thereof. Background technique [0002] At present, the rapid development of printed electronic materials has promoted the formation, development and progress of related industries. The continuous development of microelectronics technology has promoted the further development of printed electronic materials in the direction of high density, multi-layer, high reliability, low cost, short cycle and automated continuous production. However, the photolithography technology used in the traditional printed circuit industry involves processes such as etching, metal deposition and electroplating, and is accompanied by the generation of a large amount of toxic chemical waste. Inkjet printing technology, which can directly fabricate circuits on substrates, can avoid these problems, so it has received widespread attention. [0003] The cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/36C09D11/38
CPCC09D11/52C09D11/36C09D11/38
Inventor 罗健庄锦勇
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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