Preparation method of graphene/silver composite conductive printing ink

A composite conductive and graphene technology, used in inks, household appliances, applications, etc., can solve the problems of limited product application fields and high cost of silver conductive ink, achieve low cost, meet the resistivity, and reduce the effect of silver content

Inactive Publication Date: 2015-01-28
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of precious metal silver, the cost of silver conductive ink is high, which limits the application fields of the product

Method used

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  • Preparation method of graphene/silver composite conductive printing ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) 6g of PVP was dissolved in 1L of deionized water under stirring, then 100 grams of silver nitrate powder was added to the reaction medium, and then 10 grams of biomass graphene with a sheet size of 2 μm was added for use. Dissolve 20 grams of ascorbic acid in 1 L of absolute ethanol at room temperature and set aside. Place the three-neck flask in an oil bath, then put the reaction medium system containing graphene / silver nitrate into the flask, install an electric booster stirrer, a thermometer and a constant pressure dropping funnel. Heat the oil bath to 353K, then keep the temperature constant, drop the ethanol solution of ascorbic acid from the constant pressure dropping funnel under stirring, and finish the reaction after 6 hours. Pour the system out of the flask, and separate the solid and liquid in a high-speed centrifuge to obtain solid graphene / spherical silver powder particles, and the particle size of the spherical silver powder is 0.8 μm;

[0026] (2) Gr...

Embodiment 2

[0030] (1) Dissolve 60g of PVP in 10L of deionized water under stirring, then add 2000 grams of silver nitrate powder into the reaction medium, and then add 100 grams of biomass graphene with a sheet size of 5 μm for use. Dissolve 500 grams of ascorbic acid in 10 L of absolute ethanol at room temperature and set aside. Place the three-neck flask in an oil bath, then put the reaction medium system containing graphene / silver nitrate into the flask, install an electric booster stirrer, a thermometer and a constant pressure dropping funnel. Heat the oil bath to 353K, then keep the temperature constant, drop the ethanol solution of ascorbic acid from the constant pressure dropping funnel under stirring, and finish the reaction after 6 hours. Pour the system out of the flask, and separate the solid and liquid in a high-speed centrifuge to obtain solid graphene / spherical silver powder particles, and the particle size of the spherical silver powder is 1.5 μm;

[0031] (2) Graphene / sp...

Embodiment 3

[0035] (1) Dissolve 15g of PVP in 5L of deionized water under stirring, then add 500 grams of silver nitrate powder into the reaction medium, and then add 50 grams of biomass graphene with a sheet size of 5 μm for use. Dissolve 100 grams of ascorbic acid in 5 L of absolute ethanol at room temperature and set aside. Place the three-neck flask in an oil bath, then put the reaction medium system containing graphene / silver nitrate into the flask, install an electric booster stirrer, a thermometer and a constant pressure dropping funnel. Heat the oil bath to 353K, then keep the temperature constant, drop the ethanol solution of ascorbic acid from the constant pressure dropping funnel under stirring, and finish the reaction after 6 hours. Pour the system out of the flask, and separate the solid and liquid in a high-speed centrifuge to obtain solid graphene / spherical silver powder particles, and the particle size of the spherical silver powder is 2 μm;

[0036] (2) Graphene / spherica...

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Abstract

The invention discloses a preparation method of graphene/silver composite conductive printing ink. The method comprises the following steps: adding biomass graphene into a spherical silver powder reducing system to form graphene/spherical silver composite powder, performing mechanical ball milling to form graphene/sheet-like silver composite powder, and mixing the graphene/sheet-like silver composite powder and a resin system to form the graphene/silver composite conductive printing ink. According to the preparation method, the requirements of low resistivity, high fineness, large adhesion power and high hardness of an electronic circuit can be met while the silver content is reduced, and the graphene/silver composite conductive printing ink is expected to be widely applied to different electronic information products such as a touch screen, an RFID (radio frequency identification device), a flexible circuit and a supercapacitor.

Description

technical field [0001] The invention relates to a preparation method of conductive ink used in the electronics industry, in particular to a preparation method of graphene / silver composite conductive ink used for manufacturing electronic glue used in the electronics industry. Background technique [0002] Silver conductive ink is an electronic coating with flake silver powder as the conductive functional phase and resins such as epoxy, phenolic, PE, and chlorinated vinegar as the bonding phase. It is widely used in printed circuit boards (PCBs), radio frequency identification (RFID ), display devices (such as OLED, touch screen), electrode sensors, etc., and can be potentially applied to organic solar cells, printed batteries, and supercapacitors. However, due to the high price of precious metal silver, the cost of silver conductive ink is high, which limits the application fields of the product. [0003] Graphene can be divided into two categories. One type is a film compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52
CPCC09D11/52
Inventor 琚伟张继辉
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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