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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 properties and high cost of the conductive paint of the prior art, and improve a kind of graphene-carbon black composite conductive paint

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

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preparation example Construction

[0044] The present invention also provides a kind of preparation method of graphene-carbon black composite conductive coating, and the method comprises the following steps:

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

[0046] (2) grinding the mixture obtained through step (1);

[0047] (3) Add the first water-based 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 conditions include: the stirring rate can be 500-1000rpm, preferably 700-1000rpm, and the stirring time can be 30-60min, preferably 40-60min; 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...

Embodiment 1

[0064] This embodiment is used for illustrating and adopting the method of the present invention to prepare graphene-carbon black composite conductive paint

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

[0066] (2) The mixture of step (1) is then put into a grinder, ground to a fineness of 0.2 μm, and discharged to obtain a graphene / carbon black dispersion;

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

[0068] Results The conductive paint T1 prepared above was coated on ABS board, tinplate board and ...

Embodiment 2

[0071] This embodiment is used for illustrating and adopting the method of the present invention to prepare graphene-carbon black composite conductive paint

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

[0073] (2) The mixture of step (1) is then put into a grinder, ground to a fineness of 1 μm, and discharged 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-forming agent dodecyl alcohol ester, 4g drying accelerator diethylene glycol ether Add 4g of thickener RM-8W into the reaction kettle, adjust the pH to 9.0, and stir for 1.5h at 800r / min to obtai...

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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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