Conducting ink and preparation method thereof

A technology of conductive ink and conductive filler, applied in inks, household appliances, applications, etc., can solve the problems of unfavorable industrialization, high production cost, high silver content, and achieve good void filling, improved electrical conductivity, and high electron mobility. Effect

Inactive Publication Date: 2017-03-08
DEYANG CARBONENE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the practical application process, the silver content in this patent is too high, and nano-scale silver powder is used, resulting in higher production costs
In addition, nano-scale silver powder is too difficult to disperse in materials, which is extremely unfavorable for industrialization

Method used

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  • Conducting ink and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A conductive ink, comprising the following components in parts by mass: 35-55 parts of conductive filler, 20-30 parts of binder, 9-21 parts of solvent, and 2-5 parts of auxiliary agent; wherein, the conductive filler It includes graphene, flake silver powder and spherical silver powder, and the graphene, flake silver powder and spherical silver powder respectively account for 0.2-2 parts, 30-40 parts and 5-15 parts of the total amount of conductive filler.

[0035] In this embodiment, the graphene is intrinsic graphene, the number of layers is 1-10, the sheet size is 1-5 μm, and the average thickness is less than 3 nm.

[0036] In this embodiment, the average particle size of the flake silver powder is 2.0-5.0 μm, and the tap density is 1.8-3.0 g / cm 3 , the bulk density is 0.8-1.4 g / cm 3 , the specific surface area is 0.7-1.4m 2 / g.

[0037] In this embodiment, the average particle diameter of the spherical silver powder is 0.4-1.2 μm, and the tap density is 4.5-5.2 ...

Embodiment 2

[0053] A conductive ink, comprising the following components in parts by mass: 35 parts of conductive fillers, 20 parts of binders, 21 parts of solvents, 2 parts of stabilizers; wherein, the conductive fillers include graphene, flaky silver powder and Spherical silver powder, the graphene, flaky silver powder and spherical silver powder respectively account for 0.2 parts, 30 parts and 5 parts of the total amount of conductive filler.

[0054] In this embodiment, the adhesive is obtained by stirring epoxy resin and solvent at a temperature of 90° C. for 4 hours and filtering while hot.

[0055] This embodiment also provides a preparation method of conductive ink, comprising the steps of:

[0056] (1) Preparation of binder

[0057] Take the solvent and add it to the reaction kettle, add epoxy resin in proportion while stirring at 90°C, the mass ratio of solvent to epoxy resin is 4:1, after the epoxy resin is completely soaked and dissolved, keep it warm at 80°C for 4 hours, and...

Embodiment 3

[0067] A conductive ink, comprising the following components in parts by mass: 55 parts of conductive filler, 30 parts of binder, 9 parts of solvent, 5 parts of auxiliary agent; wherein, the conductive filler includes graphene, flaky silver powder and Spherical silver powder, the graphene, flaky silver powder and spherical silver powder respectively account for 2 parts, 40 parts and 15 parts of the total amount of conductive filler.

[0068] In this embodiment, the binder is obtained by stirring a polyamide resin and a solvent at a temperature of 60° C. for 4 hours and filtering while hot.

[0069] This embodiment also provides a preparation method of conductive ink, comprising the steps of:

[0070] (1) Preparation of binder

[0071] Take the solvent and add it to the reaction kettle, and add the polyamide resin in proportion under stirring at 60°C. The mass ratio of solvent to polyamide resin is 4:1. After the polyamide resin is completely soaked and dissolved, keep it warm...

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Abstract

The invention discloses conducting ink, which is prepared from the following ingredients in parts by mass: 35 to 55 parts of conducting filling materials, 20 to 30 parts of bonding agents, 9 to 21 parts of solvents and 2 to 5 parts of auxiliary agents, wherein the conducting filling materials comprise grapheme, flaky silver powder and ball-shaped silver powder; the grapheme accounts for 0.2 to 2 parts of the total amount of the conducting filling materials; the flaky silver powder accounts for 30 to 40 parts of the total amount of the conducting filling materials; the ball-shaped silver powder accounts for 5 to 15 parts of the total amount of the conducting filling materials. The invention also discloses a preparation method of the conducting ink. The method comprises the following steps of (1) bonding agent preparation; (2) grapheme precursor preparation; (3) crude pulp preparation; (4) grinding and filtering; (5) finished product obtaining. The preparation method has the advantages that the conducting performance and the anti-bending performance of the ink can be obviously improved; in addition, the characteristics of wide printing applicability, low conducting ink solid content and the like are realized.

Description

technical field [0001] The invention relates to the technical field of screen printing conductive ink, in particular to a composite conductive ink utilizing graphene and silver and a preparation method thereof. Background technique [0002] Conductive ink (electrically conductive printing ink), a paste ink made of conductive materials (gold, silver, copper and carbon) dispersed in a binder, commonly known as paste ink. It has a certain degree of conductive properties and can be used for printing conductive points or conductive lines. Gold-based conductive inks, silver-based conductive inks, copper-based conductive inks, and carbon-based conductive inks have been put into practical use for printed circuits, electrodes, electroplating bottom layers, keyboard contacts, and printed resistors. [0003] At present, there are many technologies for preparing composite conductive inks using graphene and silver. For example, the prior art with the Chinese patent announcement number "...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52
CPCC09D11/52
Inventor 尹天平姚林何洪泉高华
Owner DEYANG CARBONENE TECH
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