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Preparation method of water-based graphene conductive slurry

A technology of water-based graphene and conductive paste, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve problems such as poor conductivity, copper powder oxidation, ink conductivity reduction, etc. Achieve the effects of improved stability, short production cycle and enhanced adhesion

Pending Publication Date: 2022-02-08
SHANDONG HUAGUAN SMART CARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, silver and copper are mainly used in RFID antennas. Although silver-based conductive inks have good conductivity, the price of silver is between 5 and 8 yuan per gram, not to mention the metal-based conductive inks. The required nanoscale conductive agent is more expensive; although copper powder also has good conductivity, as the use time increases, the copper powder will oxidize, which will reduce the conductivity of the ink
Carbon-based conductive ink, as a cheap material, also has certain research prospects in some fields. At present, carbon nanotubes, conductive carbon black, and graphene are more widely used, but there are still some problems such as poor conductivity and poor contact with substrates. The problem of poor adhesion and poor printing adaptability
Composite conductive inks are difficult to mass-produce due to the complexity of their preparation methods

Method used

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  • Preparation method of water-based graphene conductive slurry
  • Preparation method of water-based graphene conductive slurry

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preparation example Construction

[0024] The preparation of graphene oxide in the present application can be by multiple methods, Brodie method, Staudenmaier method and Hummers method, what generally adopts is Hummers method.

[0025] Rosin-modified maleic acid resin was purchased from Deqing Haizhuo Chemical Co., Ltd.

Embodiment 1

[0027] A preparation method for water-based graphene conductive paste, comprising the following steps:

[0028] (1) Preparation of graft-reduced graphene oxide: divide 20 parts of graphene oxide prepared by the Hummers method with a particle size of 1-20 microns into the aqueous solution, add 1 part of sodium lignosulfonate, and then add 2 parts of ammonia Add 0.05 parts of ammonium persulfate and 0.05 parts of sodium bisulfite to the purified maleic anhydride aqueous solution (1:1), and ultrasonically react for 2 hours at a temperature of 40°C, filter the reacted graphene, and dry to obtain graft reduction Graphene oxide;

[0029] (2) 3.3 parts of rosin-modified maleic acid resin with a solid content of 30% are dispersed in 300 parts of water;

[0030] (3) Disperse graft-reduced graphene oxide and nano-scale carbon black into the aqueous solution of the above step (2) according to a mass ratio of 3:1, add 2 drops of defoamer, and mix to obtain a conductive paste.

Embodiment 2

[0032] A preparation method for water-based graphene conductive paste, comprising the following steps:

[0033] (1) Preparation of graft-reduced graphene oxide: divide 20 parts of graphene oxide prepared by the Hummers method with a particle size of 1-20 microns into the aqueous solution, add 1 part of sodium lignosulfonate, and then add 0.8 parts of ammonia Add 0.02 parts of ammonium persulfate and 0.03 parts of sodium bisulfite to the purified maleic anhydride aqueous solution (1:1), stir and react for 1 hour at a temperature of 40°C, filter the reacted graphene, and dry to obtain graft reduction Graphene oxide;

[0034] (2) 3.3 parts of rosin-modified maleic acid resin with a solid content of 30% are dispersed in 300 parts of water;

[0035] (3) Disperse graft-reduced graphene oxide and nano-scale carbon black into the aqueous solution of the above step (2) according to a mass ratio of 3:1, add 1 drop of defoamer, and mix to obtain a conductive paste.

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Abstract

The invention discloses a preparation method of water-based graphene conductive paste. The preparation method comprises the following steps: grafting reduced graphene oxide; dispersing the rosin modified maleic resin into water; dispersing the grafted reduced graphene oxide and nano-scale carbon black into the aqueous solution according to a mass ratio of 3: 1, adding an auxiliary agent, and performing mixing to obtain the conductive paste. The graphene oxide is grafted, so that on one hand, the stability of the graphene oxide is improved, and the graphene oxide which is not easy to agglomerate can be widely used; on the other hand, the binding force between the grafted polymer and the resin can be enhanced, so that the adhesive force between the conductive paste and the base material is enhanced. The conductive paste prepared by the invention is aqueous paste, avoids the use of an organic solvent, is green and environment-friendly, is convenient to operate, is short in production period, and is easy to realize industrial production.

Description

technical field [0001] The invention relates to the field of conductive ink paste, in particular to a preparation method of water-based graphene conductive paste. Background technique [0002] Electronic printing technology is a relatively complex and costly technology. Printed electronics technology is actually a kind of additive manufacturing technology. The materials in the manufacturing process will only be deposited in the required parts, so it can greatly reduce environmental pollution and The waste of material resources provides more frequent and cheaper product updates and processing. In addition, printed electronics technology can also meet the requirements of low-cost, flexible and high-density electronic product manufacturing. [0003] As a key material of printed electronics technology, conductive ink determines the development of the technical field to a certain extent. At present, the research on conductive inks in the world mainly focuses on three aspects: 1)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/24G06K19/077
CPCH01B13/00H01B1/24G06K19/0772
Inventor 冷金凤刘振禹周庆波许祥磊马有明陈韶华赵娟刘慧靖
Owner SHANDONG HUAGUAN SMART CARD