Preparation method of copper conductive ink

A technology of conductive ink and copper salt, applied in inks, household appliances, applications, etc., can solve the problems of unstable copper particles and wide particle size distribution of copper particles, and achieve no chemical toxicity, concentrated particle size distribution, and cheap and easy-to-obtain raw materials. Effect

Active Publication Date: 2015-06-03
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of wide copper particle size distribution and unstable copper particles in the existing copper conductive ink

Method used

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  • Preparation method of copper conductive ink
  • Preparation method of copper conductive ink

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preparation example Construction

[0013] The invention provides a kind of preparation method of copper conductive ink, the method comprises the following steps:

[0014] S1. Heating the copper salt aqueous solution to 78-82° C., then adding an aqueous ascorbic acid solution and an aqueous phytic acid solution dropwise at the same time, keeping the temperature at 78-82° C. until the reaction is completed, to obtain a dispersion of copper nanoparticles;

[0015] S2, centrifuging, washing and drying the copper nanoparticle dispersion to obtain copper particles;

[0016] S3. Mixing the copper nanoparticles and the solvent to obtain the copper conductive ink.

[0017] In the preparation method of the copper conductive ink of the present invention, ascorbic acid is used as a reducing agent and a modifier at the same time. The ascorbic acid first provides an active hydrogen to reduce divalent copper ions to zero-valent copper to generate water and half-dehydrogenated ascorbic acid. Half-dehydroascorbic acid can be c...

Embodiment 1

[0032] 10mmol of CuCl 2 2H 2 O was dissolved in 50ml of deionized water, the solution was stirred with a magnetic force, and heated to 80°C with an oil bath; at the same time, the CuCl 2 2H 2 Add 50ml, 0.1mol / L ascorbic acid aqueous solution and 5ml, 0.05mol / L phytic acid aqueous solution dropwise evenly in the O solution, and the dropping time is 40min to 60min, and the dropping speed of the two is well controlled. After the reaction is completed, keep the temperature for 30 minutes, and cool naturally to obtain copper nanoparticle dispersion A1 with high dispersion stability.

Embodiment 2

[0034] Prepare copper nanoparticle dispersion liquid A2 according to the method for embodiment 1, difference is: copper salt is copper nitrate, and concentration is 0.05mol / L, and volume is 200ml; The concentration of ascorbic acid aqueous solution is 0.025mol / L, and volume is 40ml, inositol The concentration of the hexaphosphoric acid aqueous solution is 0.0125mol / L.

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Abstract

The invention provides a preparation method of a copper conductive ink; the method includes the following steps: S1, heating a copper salt aqueous solution to 78-82 DEG C, then simultaneously dropwise adding an ascorbic acid aqueous solution and an inositol hexaphosphate aqueous solution, maintaining the temperature at 78-82 DEG C until a reaction is finished, and thus obtaining a copper nanoparticle dispersion liquid; S2, carrying out centrifugal separation of the copper nanoparticle dispersion liquid, washing, drying, and thus obtaining copper particles; and S3, mixing the copper nanoparticles with a solvent to obtain the copper conductive ink. The conductive copper ink prepared by the method has high dispersion of the metallic copper nanoparticle conductive ink, has concentrated particle size distribution, and can be aerobically stored for a long time. The preparation method is green and environmentally friendly, raw materials are cheap and easy to obtain, and the copper conductive ink has no chemical toxicity and can be prepared in large scale.

Description

technical field [0001] The invention belongs to the field of conductive ink, in particular to a preparation method of copper conductive ink. Background technique [0002] At present, with the rapid popularization of radio frequency identification or RFID (Radio Frequency IDentification) technology, the conductive ink, which is one of the key factors to promote the gradual success of the RFID market, has also received more and more attention. [0003] Conductive ink is a conductive composite material formed by dispersing metal conductive particles (silver, copper, carbon, usually silver) in a binder. After printing on the substrate, it acts as a wire, antenna and resistor. The ink can be printed on flexible or rigid materials (paper, PVC, PE, etc.) to make printed circuits. After the conductive ink is dried, since the distance between the conductive particles becomes smaller, the free electrons move along the direction of the applied electric field to form a current, which h...

Claims

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Application Information

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IPC IPC(8): C09D11/52
CPCC09D11/52
Inventor 刘厚胤孔宪君陈大军
Owner BYD CO LTD
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