Graphene-carbon black composite conductive coating, preparation method and application thereof

A technology of composite conductive and conductive coatings, applied in conductive coatings and other directions, can solve the problems of poor conductivity, high cost, low mechanical properties, etc., and achieve the effect of improving conductivity and increasing quantity

Active Publication Date: 2016-08-03
MATERIAL & IND TECH RES INST BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of poor electrical conductivity, low mechanical propertie

Method used

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  • Graphene-carbon black composite conductive coating, preparation method and application thereof
  • Graphene-carbon black composite conductive coating, preparation method and application thereof
  • Graphene-carbon black composite conductive coating, preparation method and application thereof

Examples

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Example Embodiment

[0044] The present invention also provides a method for preparing graphene-carbon black composite conductive paint, which includes the following steps:

[0045] (1) Stir and mix the grinding matrix, the water-based graphene and the second dispersant under the first stirring condition, and then add the carbon black and stir and mix under the second stirring condition;

[0046] (2) Grind the mixture obtained in step (1);

[0047] (3) Add the first aqueous resin and the first dispersant to the graphene-carbon black dispersion obtained after grinding in step (2), and stir under the third stirring condition.

[0048] According to the present invention, in step (1), the first stirring condition includes: the stirring rate may be 500-1000 rpm, preferably 700-1000 rpm, and the stirring time may be 30-60 min, preferably 40-60 min; The second stirring conditions include: the stirring rate may be 1000-1500 rpm, preferably 1200-1500 rpm, and the stirring time may be 1.5-2.5 h, preferably 2.0-2.5 ...

Example Embodiment

[0063] Example 1

[0064] This example is used to illustrate the preparation of graphene-carbon black composite conductive paint using the method of the present invention

[0065] (1) Add 300g of water, 18g of polycarboxylate ammonium salt dispersant SN-5027, 6g of dispersant 760W and 450g of water-based graphene into the stirred tank, stir at 700r / min for 40min at room temperature, and then add 120g Conductive carbon black, stirring at 1200r / min for 2h;

[0066] (2) Then put the mixture in step (1) into a grinder, grind it to a fineness of 0.2 μm, and discharge the material to obtain a graphene / carbon black dispersion;

[0067] (3) Add 750g of graphene / carbon black dispersion, 300g of water-based acrylic resin, 15g of dispersant BYK190, and 5g of pH adjuster DMAE to the reactor, adjust the pH to 8.5, and stir for 1h at 800r / min to obtain Environmentally friendly graphene-carbon black composite conductive coating T1;

[0068] As a result, the conductive paint T1 prepared above was res...

Example Embodiment

[0070] Example 2

[0071] This example is used to illustrate the preparation of graphene-carbon black composite conductive paint using the method of the present invention

[0072] (1) Add 279g of water-based acrylic resin, 21g of water, 9.75g of dispersant SN-5027, 3.25g of dispersant 760W, 4.5g of defoamer 901W, and 570g of water-based graphene into a stirred tank, at room temperature, at 800r / min Stir at speed for 50min, then add 180g conductive carbon black, stir at 1250r / min for 2h;

[0073] (2) Then put the mixture of step (1) into a grinder, grind it to a fineness of 1 μm, and discharge the material to obtain a graphene / carbon black dispersion;

[0074] (3) 810g graphene / carbon black dispersion, 300g styrene-acrylic emulsion, 18g dispersant BYK190, 5.3g pH regulator DMAE, 78g film former dodecyl alcohol ester, 4g drying accelerator diethylene glycol ethyl ether Add 4g thickener RM-8W to the reactor, adjust the pH to 9.0, and stir for 1.5h at 800r / min to obtain environmentally f...

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Abstract

The invention discloses a graphene-carbon black composite conductive coating, a preparation method and an application thereof. The graphene-carbon black composite conductive coating prepared by a solution blending method contains a graphene-carbon black dispersion solution, first aqueous resin and a first dispersant, by taking 100 weight parts of the first aqueous resin as a reference, the content of the graphene-carbon black dispersion solution is 80-350 weight parts, and the content of the first dispersant is 3-10 weight parts. The conductive coating can be used for electric heating, electromagnetic shielding, printed electronic circuits, membrane switches and lithium batteries. According to the invention, conductivity of the conductive coating is increased; the carbon black and the resin have good compatibility, mechanical properties are increased, cost is low, and the aqueous resin is environmentally friendly and pollution-free, and provides theoretical basis and practical base for practical application of the conductive coating.

Description

technical field [0001] The invention belongs to the field of conductive coatings. Specifically, the invention relates to an environment-friendly graphene-carbon black composite conductive coating and a preparation method thereof, and the environment-friendly graphene-carbon black composite conductive coating is used in electromagnetic shielding, electronic circuits, and films. Applications in fields such as switches and lithium batteries. Background technique [0002] Additive conductive coatings have developed rapidly because they can be widely used in electromagnetic shielding, antistatic, electronic circuits and other fields, and a variety of strong conductive conductive coatings have been developed one after another. For example, conductive fillers mainly include metal systems (silver powder, copper powder, nickel powder, etc.) ), metal / glass composite, carbon system (graphite, carbon black), etc. However, it is difficult to improve the mechanical properties and conduct...

Claims

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Application Information

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IPC IPC(8): C09D5/24
Inventor 孙金梅李卓
Owner MATERIAL & IND TECH RES INST BEIJING
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