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A kind of preparation method of copper conductive ink

A technology of conductive ink and copper salt, which is applied in ink, household utensils, 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: 2017-07-04
BYD CO LTD
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  • Summary
  • 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, the present invention provides a preparation method of copper conductive ink with concentrated copper particle size distribution and stable copper particles

Method used

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  • A kind of preparation method of copper conductive ink
  • A kind of preparation method of copper conductive ink

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preparation example Construction

[0013] The present invention provides a method for preparing copper conductive ink. The method includes the following steps:

[0014] S1. The copper salt aqueous solution is heated to 78-82°C, and then the ascorbic acid aqueous solution and the phytic acid aqueous solution are added dropwise at the same time, and the temperature is maintained at 78-82°C until the reaction is completed to obtain a copper nanoparticle dispersion;

[0015] S2, centrifugal separation of the copper nanoparticle dispersion liquid, washing and drying, to obtain copper particles;

[0016] S3, mixing copper nanoparticles with a solvent to obtain a 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 modifier at the same time. Ascorbic acid firstly provides an active hydrogen to reduce the divalent copper ion to zero-valent copper to generate water and semi-dehydrogenated ascorbic acid. Semi-dehydroascorbic...

Embodiment 1

[0032] 10mmol CuCl 2 ·2H 2 Dissolve O in 50ml deionized water, stir the solution with magnetic force, and heat it to 80℃ with an oil bath; 2 ·2H 2 Evenly drop 50ml, 0.1mol / L ascorbic acid aqueous solution and 5ml, 0.05mol / L phytic acid aqueous solution into the O solution for a dripping time of 40min to 60min, and control the dripping speed of both. After the reaction is completed, the temperature is maintained for 30 minutes, and the mixture is naturally cooled to obtain a copper nanoparticle dispersion A1 with high dispersion stability.

Embodiment 2

[0034] The copper nanoparticle dispersion A2 was prepared according to the method of Example 1. The difference is: the copper salt is copper nitrate, the concentration is 0.05 mol / L, and the volume is 200 ml; the concentration of the ascorbic acid aqueous solution is 0.025 mol / L, the volume is 40 ml, and the inositol The concentration of 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 inks, and particularly relates to a method for preparing copper conductive ink. Background technique [0002] At present, with the rapid popularization of RFID (Radio Frequency IDentification) technology, conductive ink, which is one of the key factors for the gradual success of the RFID market, has also received increasing attention. [0003] Conductive ink is a conductive composite material formed by metal conductive particles (silver, copper, carbon, usually silver) dispersed in a binder. After being printed on the substrate, it acts as a wire, antenna and resistor. The ink can be printed on flexible or hard materials (paper, PVC, PE, etc.) to make printed circuits. After the conductive ink is dried, as the distance between the conductive particles becomes smaller, the free electrons move in the direction of the applied electric field to form a current, which has good conductivity and can receive radio freq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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