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A kind of preparation method of conductive ink

A conductive ink and preparation process technology, applied in inks, household appliances, applications, etc., can solve the problems of reduced conductivity of the ink layer, uneven dispersion of conductive materials and pigments and fillers, and uneven color of the ink layer. The effect of uniform performance, color and conductivity

Active Publication Date: 2022-04-08
海盐华达油墨有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of conductive ink, by preparing the pigment with certain conductive property, make pigment itself have certain conductive ability, meanwhile the surface of pigment is grafted with hydrophilic group, can mix with prepared hydrophilic The conductive binder is fully mixed and dispersed, and uniform dispersion can be achieved without adding a dispersant, so that the conductive ink layer prepared has uniform conductivity and uniform color, thereby solving the problem of directly adding the conductive ink in the existing conductive ink preparation process. Adding conductive materials and pigments and fillers will easily cause uneven dispersion between conductive materials and pigments and fillers, which will reduce the conductivity of the ink layer and the color of the ink layer will vary.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The specific preparation process of conductive pigment is as follows:

[0031] ①Put 160g of copper sulfate and 1446g of ferrous sulfate into 3L of water at the same time and stir to dissolve, then add 200mL of oleic acid to it, mix well, and then add a mixed solution of sodium borohydride and potassium hydroxide dropwise at room temperature, wherein the mixed solution It is prepared by adding 251g of sodium borohydride and 358g of potassium hydroxide into 800mL of water, stirring the reaction until a precipitate is formed, stopping the stirring reaction for 1.5-2h, then aging for 1h, suction filtration, washing and drying to obtain a nano-alloy material, and then 1kg The nano-alloy material is added to 5L of hydrochloric acid solution with a concentration of 6-7%, stirred and reacted for 4-5 hours, and then filtered and washed until neutral to obtain a porous nano-metal material;

[0032] ②Place the porous nano-metal material prepared in step ① in the quartz boat of the...

Embodiment 2

[0037] Step ①: Add 1kg graphene to 30L concentrated sulfuric acid solution, add 0.6kg sodium nitrate to it at the same time, then react in an ice-water bath for 20-30min, then add 3.4kg potassium permanganate to it, stir and react for 5-10min Raise the temperature to 50°C for 5-6 hours, cool to room temperature, then slowly add hydrogen peroxide dropwise until the color of the solution turns brown, then filter, wash and dry to obtain graphene oxide;

[0038] Step ②: Add 0.83kg of water-soluble nigrosine and 5L of water into the reaction vessel, stir and dissolve, then raise the temperature to 80-90°C and reflux. At the same time, add 1kg of graphene oxide prepared in step ① to it, and react under constant temperature reflux for 9-10h. Then it was filtered, washed with ethanol and acetone in turn, and then dried to obtain a yellow-black powder.

Embodiment 3

[0040] The specific preparation process of hydrophilic linking material is as follows:

[0041] Step 1: Add 1kg of citric acid into 25L of thionyl chloride, raise the temperature to 80-90°C for reflux reaction for 8-10 hours, and then perform vacuum distillation to remove unreacted thionyl chloride to obtain powder product A;

[0042] Step 2: Add 0.165kg of boric acid and 1kg of phenol into the reaction vessel, add 12L of ether to it at the same time, raise the temperature to 100-110°C and reflux and stir until the solid dissolves, then add 1.36kg of the powder product A prepared in step 1, powder Product A was added in three times, with the same amount each time. After each addition, stir and react for 30-40 minutes before adding the second time. After the powder product was completely added, continue to stir and react for 1.5-2 hours, then cool the product and add drops to it. Add hydrochloric acid until no solid is precipitated, then filter, add the filtrate to benzene and ...

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Abstract

The invention discloses a preparation method of conductive ink. The specific preparation process is as follows: adding a hydrophilic binder into water, stirring and dissolving, adding a conductive pigment therein, mixing and stirring for 3-5 minutes to obtain a uniformly dispersed slurry, and then pouring into the slurry Add epoxy curing agent to the material, grind and disperse for 10‑15min to obtain conductive ink. In the present invention, by preparing the pigment with certain conductive properties, the pigment itself has a certain conductivity, and at the same time, the surface of the pigment is grafted with a hydrophilic group, which can be fully mixed and dispersed with the prepared hydrophilic binder without adding a dispersant. Uniform dispersion can be realized, so that the prepared conductive ink layer has uniform conductive performance and uniform color of the ink layer.

Description

technical field [0001] The invention belongs to the field of ink preparation and relates to a preparation method of conductive ink. Background technique [0002] Conductive inks usually include adding pigments, fillers, and binders into solvents, and at the same time adding functional additives such as dispersants and conductive materials to achieve electrical conductivity. However, the existing conductive ink preparation process will directly add conductive materials and pigments and fillers, it is easy to cause uneven dispersion between conductive materials and pigments and fillers, which will reduce the conductivity of the ink layer, and the color of the ink layer is different, and the binder used in the ink preparation process cannot be compatible with the conductive material of the solid. The materials and pigments and fillers are fully and evenly dispersed, which not only reduces the bonding performance, but also causes uneven dispersion of pigments and fillers, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/52C09D11/037
CPCC09D11/52C09D11/037
Inventor 不公告发明人
Owner 海盐华达油墨有限公司