CN111777916A - Water-based graphene electromagnetic shielding coating and preparation method thereof - Google Patents
Water-based graphene electromagnetic shielding coating and preparation method thereof Download PDFInfo
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- CN111777916A CN111777916A CN202010808581.7A CN202010808581A CN111777916A CN 111777916 A CN111777916 A CN 111777916A CN 202010808581 A CN202010808581 A CN 202010808581A CN 111777916 A CN111777916 A CN 111777916A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
Abstract
The invention relates to a water-based graphene electromagnetic shielding coating and a preparation method thereof, belonging to the technical field of water-based coatings. Comprises a component A and a component B; the component A comprises the following components in parts by weight: 5-50 parts of graphene, 5-15 parts of curing agent, 10-60 parts of filler, 1-5 parts of auxiliary agent, 1-20 parts of dispersing agent and 10-40 parts of water; the auxiliary agent comprises a defoaming agent I, a defoaming agent II, a flatting agent and a film-forming auxiliary agent. The component B comprises the following components in parts by weight: 80-100 parts of water-based resin and 1-10 parts of adhesion promoter. According to the invention, the graphene is used in the water-based electromagnetic shielding coating, so that the inherent defect that the graphene is easy to agglomerate is overcome, and the graphene can be uniformly dispersed, so that the coating has better electromagnetic shielding performance and other coating performances.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to water-based graphene electromagnetic shielding paint and a preparation method thereof.
Background
Graphene is a two-dimensional carbon nanomaterial consisting of carbon atoms in sp2 hybridized orbitals to form a hexagonal honeycomb lattice. The material has excellent optical, electrical and mechanical properties, has important application prospects in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, and is considered to be a revolutionary material in the future. The graphene has high electron mobility, and can be applied to the aspects of electromagnetic shielding, static resistance and the like of equipment.
The graphene shows good solubility in a non-polar solvent, and has super-hydrophobicity and super-lipophilicity. Therefore, the application of graphene in the coating is mostly used in a solvent-based coating, but the application causes serious damage to the environment and human body. The existing water-based graphene coating has the problems that graphene fillers are easy to agglomerate, the adhesion force of a paint film is poor and the like, which are all problems to be solved urgently.
Disclosure of Invention
Aiming at the problems that the aqueous graphene coating in the prior art is easy to agglomerate, the paint film adhesion force is poor and the like, the invention provides the aqueous graphene electromagnetic shielding coating and the preparation method thereof, so as to solve the problems.
The aqueous graphene electromagnetic shielding coating comprises a component A and a component B; the component A comprises the following components in parts by weight: 5-50 parts of graphene, 5-15 parts of curing agent, 10-60 parts of filler, 1-5 parts of auxiliary agent, 1-20 parts of dispersing agent and 10-40 parts of water; the auxiliary agent comprises a defoaming agent I, a defoaming agent II, a flatting agent and a film-forming auxiliary agent. The component B comprises the following components in parts by weight: 80-100 parts of water-based resin and 1-10 parts of adhesion promoter.
Preferably, the amount ratio of the component A to the component B is 10: 5-20 by weight.
Preferably, the curing agent is a water-based organic amine curing agent, and specifically is one or a mixture of two of EMA-3001 and EH-613W.
Preferably, the aqueous resin is an aqueous epoxy resin, in particular, Vast 6529. The epoxy resin has the advantages of small molding shrinkage and good corrosion resistance.
Preferably, the filler is one or a mixture of more of titanium dioxide, antirust pigment, talcum powder, barite powder and mica powder.
Preferably, the dispersant is one or a mixture of several of Silok7036, Silok7139w, Silok7195W and OROTAN 731A.
Preferably, the defoaming agent is one or a mixture of two of TEGO902w and TEGO 1488.
Preferably, the leveling agent is TEGO Twin 4100.
Preferably, the film-forming assistant is one or a mixture of more of dipropylene glycol butyl ether, DMP and decanediol ester.
The invention also provides a preparation method of the water-based graphene electromagnetic shielding coating, which comprises the following specific steps:
(1) adding water accounting for 1/2-3/4 of the total amount into a mixing tank I, then adding a curing agent, a defoaming agent I, a flatting agent and a dispersing agent, and fully stirring for 10-20 min at the rotating speed of 400-800 rpm to obtain a primary mixed solution;
(2) adding graphene and a filler into a grinding instrument, adding the primary mixed liquid obtained in the step (1) into the grinding instrument, and fully grinding for 0.5-2 hours;
(3) pouring the ground slurry into a moving disc, sequentially adding the rest water, the film-forming aid and the defoamer II under the stirring condition, stirring at the rotating speed of 400-800 rpm for 0.5-1 h to obtain a component A;
(4) adding the resin and the adhesion promoter into a mixing tank II according to the weight percentage of the formula, and uniformly stirring and mixing to obtain a component B;
(5) adding the component A prepared in the step (3) and the component B prepared in the step (4) into a reactor, and stirring for 10-20 min at a stirring speed of 400-800 rpm to uniformly mix;
(6) standing for about 30min to remove bubbles, and spraying.
The invention has the beneficial effects that:
(1) according to the invention, the graphene is used in the water-based electromagnetic shielding coating, so that the inherent defect that the graphene is easy to agglomerate is overcome, and the graphene can be uniformly dispersed, so that the coating has better electromagnetic shielding performance and other coating performances.
(2) The aqueous graphene electromagnetic shielding coating prepared by the invention adopts graphene as a main functional filler, and can be obtained by matching with the excellent corrosion resistance of aqueous resin.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The aqueous graphene electromagnetic shielding coating comprises the following materials in parts by weight:
the component A comprises: 15 parts of graphene, 5 parts of a curing agent, 20 parts of a filler (8 parts of titanium dioxide, 5 parts of an anti-rust pigment, 3 parts of talcum powder and 4 parts of mica powder), 0.5 part of a defoaming agent I, 0.5 part of a defoaming agent II, 0.5 part of a flatting agent, 3 parts of a film-forming assistant, 3 parts of a dispersing agent and 20 parts of water;
a component B; 80 parts of water-based epoxy resin and 1.5 parts of adhesion promoter.
The preparation method comprises the following specific steps:
(1) adding 15 parts of water into a mixing tank I, then adding 5 parts of a curing agent, 0.5 part of a defoaming agent I, 0.5 part of a leveling agent and 3 parts of a dispersing agent, and fully stirring for 10min at the rotating speed of 400-800 rpm to obtain a primary mixed solution;
(2) adding 15 parts of graphene, 8 parts of titanium dioxide, 5 parts of anti-rust pigment, 3 parts of talcum powder and 4 parts of mica powder into a grinding instrument, adding the primary mixed liquid obtained in the step (1) into the grinding instrument, and fully grinding for 0.5 h;
(3) pouring the ground slurry into a movable disc, sequentially adding 5 parts of water, 3 parts of dipropylene glycol butyl ether and 0.5 part of defoamer II under the condition of stirring, stirring at the rotating speed of 400-800 rpm for 0.5h to obtain a component A;
(4) according to the weight percentage of the formula, 80 parts of waterborne epoxy resin and 1.5 parts of adhesion promoter are added into a mixing tank II to be uniformly stirred and mixed, so as to obtain a component B;
(5) adding the component A prepared in the step (3) and the component B prepared in the step (4) into a reactor, and stirring for 10min at a stirring speed of 400-800 rpm to uniformly mix;
(6) standing for about 30min to remove bubbles, and spraying.
Example 2
The aqueous graphene electromagnetic shielding coating comprises the following materials in parts by weight:
the component A comprises: 28 parts of graphene, 10 parts of a curing agent, 35 parts of a filler (12 parts of titanium dioxide, 10 parts of an anti-rust pigment, 7 parts of talcum powder and 6 parts of mica powder), 0.8 part of a defoaming agent I, 0.7 part of a defoaming agent II, 1.0 part of a leveling agent, 5 parts of dipropylene glycol butyl ether, 4 parts of a dispersing agent and 30 parts of water;
a component B; 90 parts of water-based epoxy resin and 5 parts of adhesion promoter.
The preparation method comprises the following specific steps:
(1) adding 20 parts of water into a mixing tank I, then adding 10 parts of a curing agent, 0.8 part of a defoaming agent I, 1.0 part of a leveling agent and 4 parts of a dispersing agent, and fully stirring for 15min at the rotating speed of 400-800 rpm to obtain a primary mixed solution;
(2) adding 28 parts of graphene, 12 parts of titanium dioxide, 10 parts of anti-rust pigment, 7 parts of talcum powder and 6 parts of mica powder into a grinding instrument, adding the primary mixed liquid obtained in the step (1) into the grinding instrument, and fully grinding for 1 hour;
(3) pouring the ground slurry into a moving disc, sequentially adding 10 parts of water, 5 parts of dipropylene glycol butyl ether and 0.7 part of defoamer II under the condition of stirring, stirring at the rotating speed of 400-800 rpm for 1h to obtain a component A;
(4) according to the weight percentage of the formula, 90 parts of waterborne epoxy resin and 5 parts of adhesion promoter are added into a mixing tank II to be uniformly stirred and mixed, so as to obtain a component B;
(5) adding the component A prepared in the step (3) and the component B prepared in the step (4) into a reactor, and stirring for 10min at a stirring speed of 400-800 rpm to uniformly mix;
(6) standing for about 30min to remove bubbles, and spraying.
Example 3
The aqueous graphene electromagnetic shielding coating comprises the following materials in parts by weight:
the component A comprises: 50 parts of graphene, 15 parts of a curing agent, 55 parts of a filler (20 parts of titanium dioxide, 10 parts of an anti-rust pigment, 9 parts of talcum powder, 8 parts of barite powder and 8 parts of mica powder), 1.0 part of a defoaming agent I, 1.0 part of a defoaming agent II, 1.0 part of a leveling agent, 8 parts of dipropylene glycol butyl ether, 5 parts of a dispersing agent and 40 parts of water;
a component B; 100 parts of water-based epoxy resin and 8 parts of adhesion promoter.
The preparation method comprises the following specific steps:
(1) adding 30 parts of water into a mixing tank I, then adding 15 parts of a curing agent, 1.0 part of a defoaming agent I, 1.0 part of a leveling agent and 5 parts of a dispersing agent, and fully stirring for 20min at the rotating speed of 400-800 rpm to obtain a primary mixed solution;
(2) adding 50 parts of graphene, 20 parts of titanium dioxide, 10 parts of anti-rust pigment, 9 parts of talcum powder, 8 parts of barite powder and 8 parts of mica powder into a grinding instrument, adding the primary mixed liquid obtained in the step (1) into the grinding instrument, and fully grinding for 1 hour;
(3) pouring the ground slurry into a moving disc, sequentially adding 10 parts of water, 8 parts of dipropylene glycol butyl ether and 1.0 part of defoamer II under the condition of stirring, stirring at the rotating speed of 400-800 rpm for 1h to obtain a component A;
(4) according to the weight percentage of the formula, 100 parts of waterborne epoxy resin and 8 parts of adhesion promoter are added into a mixing tank II to be uniformly stirred and mixed, so as to obtain a component B;
(5) adding the component A prepared in the step (3) and the component B prepared in the step (4) into a reactor, and stirring for 10min at a stirring speed of 400-800 rpm to uniformly mix;
(6) standing for about 30min to remove bubbles, and spraying.
Comparative example
The aqueous graphene electromagnetic shielding coating comprises the following materials in parts by weight:
the component A comprises: 28 parts of graphene, 40 parts of isocyanate curing agent, 35 parts of filler (12 parts of titanium dioxide, 10 parts of antirust pigment, 7 parts of talcum powder and 6 parts of mica powder), 0.8 part of defoaming agent I, 0.7 part of defoaming agent II, 1.0 part of flatting agent, 5 parts of dipropylene glycol butyl ether, 4 parts of dispersing agent and 30 parts of water;
a component B; 55 parts of water-based acrylic resin and 5 parts of adhesion promoter.
The preparation method comprises the following specific steps:
(1) adding 20 parts of water into a mixing tank I, then adding 55 parts of water-based acrylic resin 4, 0.8 part of defoaming agent I, 1.0 part of flatting agent, 4 parts of dispersing agent and 5 parts of adhesion promoter, and fully stirring for 15min at the rotating speed of 400-800 rpm to obtain a primary mixed solution;
(2) adding 28 parts of graphene, 12 parts of titanium dioxide, 10 parts of anti-rust pigment, 7 parts of talcum powder and 6 parts of mica powder into a grinding instrument, adding the primary mixed liquid obtained in the step (1) into the grinding instrument, and fully grinding for 1 hour;
(3) pouring the ground slurry into a moving disc, sequentially adding 10 parts of water, 5 parts of dipropylene glycol butyl ether and 0.7 part of defoamer II under the condition of stirring, stirring at the rotating speed of 400-800 rpm for 1h to obtain a component A;
(4) adding the component A prepared in the step (3) and 40 parts of isocyanate curing agent into a reactor, and stirring for 10min at a stirring rotation speed of 400-800 rpm to uniformly mix;
(5) standing for about 30min to remove bubbles, and spraying.
The paint films sprayed in the examples 1, 2, 3 and the comparative examples are subjected to performance tests, and the specific results are shown in the following table 1:
TABLE 1 results of the measurements
Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The aqueous graphene electromagnetic shielding coating is characterized by comprising a component A and a component B; the component A comprises the following components in parts by weight: 5-50 parts of graphene, 5-15 parts of curing agent, 10-60 parts of filler, 1-5 parts of auxiliary agent, 1-20 parts of dispersing agent and 10-40 parts of water; the auxiliary agent comprises a defoaming agent I, a defoaming agent II, a flatting agent and a film-forming auxiliary agent; the component B comprises the following components in parts by weight: 80-100 parts of water-based resin and 1-10 parts of adhesion promoter.
2. The aqueous graphene electromagnetic shielding coating according to claim 1, wherein the amount ratio of the component A to the component B is 10: 5-20 by weight.
3. The aqueous graphene electromagnetic shielding paint according to claim 1, wherein the curing agent is an aqueous organic amine curing agent, specifically one or a mixture of two of EMA-3001 and EH-613W.
4. The aqueous graphene electromagnetic shielding coating of claim 1, wherein the aqueous resin is an aqueous epoxy resin, in particular Vast 6529.
5. The aqueous graphene electromagnetic shielding paint of claim 1, wherein the filler is one or a mixture of titanium dioxide, anti-rust pigment, talcum powder, barite powder and mica powder.
6. The aqueous graphene electromagnetic shielding paint of claim 1, wherein the dispersant is one or a mixture of several of Silok7036, Silok7139w, Silok7195W and OROTAN 731A.
7. The aqueous graphene electromagnetic shielding coating of claim 1, wherein the defoamer is one or a mixture of TEGO902w and TEGO 1488.
8. The aqueous graphene electromagnetic shielding coating of claim 1, wherein the leveling agent is TEGOTwin 4100.
9. The aqueous graphene electromagnetic shielding paint according to claim 1, wherein the film forming aid is one or a mixture of dipropylene glycol butyl ether, DMP and decaglycol ester.
10. The preparation method of the water-based graphene electromagnetic shielding coating is characterized by comprising the following specific steps of:
(1) adding water accounting for 1/2-3/4 of the total amount into a mixing tank I, then adding a curing agent, a defoaming agent I, a flatting agent and a dispersing agent, and fully stirring for 10-20 min at the rotating speed of 400-800 rpm to obtain a primary mixed solution;
(2) adding graphene and a filler into a grinding instrument, adding the primary mixed liquid obtained in the step (1) into the grinding instrument, and fully grinding for 0.5-2 hours;
(3) pouring the ground slurry into a moving disc, sequentially adding the rest water, the film-forming aid and the defoamer II under the stirring condition, stirring at the rotating speed of 400-800 rpm for 0.5-1 h to obtain a component A;
(4) adding the resin and the adhesion promoter into a mixing tank II according to the weight percentage of the formula, and uniformly stirring and mixing to obtain a component B;
(5) adding the component A prepared in the step (3) and the component B prepared in the step (4) into a reactor, and stirring for 10-20 min at a stirring speed of 400-800 rpm to uniformly mix;
(6) standing for about 30min to remove bubbles, and spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010808581.7A CN111777916A (en) | 2020-08-12 | 2020-08-12 | Water-based graphene electromagnetic shielding coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010808581.7A CN111777916A (en) | 2020-08-12 | 2020-08-12 | Water-based graphene electromagnetic shielding coating and preparation method thereof |
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| CN111777916A true CN111777916A (en) | 2020-10-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112409898A (en) * | 2020-10-30 | 2021-02-26 | 广东聚石科技研究有限公司 | Waterproof coating and preparation method and application thereof |
| CN113502108A (en) * | 2021-07-20 | 2021-10-15 | 江苏筑立建筑科技有限公司 | Graphene flame-retardant sealing coating and preparation method thereof |
-
2020
- 2020-08-12 CN CN202010808581.7A patent/CN111777916A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112409898A (en) * | 2020-10-30 | 2021-02-26 | 广东聚石科技研究有限公司 | Waterproof coating and preparation method and application thereof |
| CN113502108A (en) * | 2021-07-20 | 2021-10-15 | 江苏筑立建筑科技有限公司 | Graphene flame-retardant sealing coating and preparation method thereof |
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Application publication date: 20201016 |