CN114085412B - Graphene conductive material and preparation method and application thereof - Google Patents

Graphene conductive material and preparation method and application thereof Download PDF

Info

Publication number
CN114085412B
CN114085412B CN202111464575.5A CN202111464575A CN114085412B CN 114085412 B CN114085412 B CN 114085412B CN 202111464575 A CN202111464575 A CN 202111464575A CN 114085412 B CN114085412 B CN 114085412B
Authority
CN
China
Prior art keywords
component
graphene
conductive material
coating
titanium nitride
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111464575.5A
Other languages
Chinese (zh)
Other versions
CN114085412A (en
Inventor
许永平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Shengtong New Material Technology Co ltd
Original Assignee
Hunan Shengtong New Material Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Shengtong New Material Technology Co ltd filed Critical Hunan Shengtong New Material Technology Co ltd
Priority to CN202111464575.5A priority Critical patent/CN114085412B/en
Publication of CN114085412A publication Critical patent/CN114085412A/en
Application granted granted Critical
Publication of CN114085412B publication Critical patent/CN114085412B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • 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
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • 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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • 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
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • 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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • 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
    • C09D5/24—Electrically-conducting paints
    • 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
    • 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
    • C08K2201/001—Conductive additives
    • 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
    • C08K2201/011—Nanostructured additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a graphene conductive material and a preparation method and application thereof, wherein the conductive material is of a layered structure and sequentially comprises a conductive layer, a shading layer and a base material from top to bottom; the conducting layer is a graphene coating, and the thickness of the conducting layer is less than 50 micrometers; the shading layer is a titanium nitride coating, and the thickness of the titanium nitride coating is less than 20 mu m; the surface resistance of the conductive material is less than 500m omega/sq, and the reflectivity of the conductive material in a wave band of 350-1400 nm is less than 2%. The conductive material has excellent conductivity, light shading and absorption performance and friction resistance, and is obviously superior to black conductive materials sold in the market. The preparation method is simple in process, and the prepared conductive material is excellent in shading effect and can be applied to the fields of darkroom shading, electromagnetic shielding and the like.

Description

Graphene conductive material and preparation method and application thereof
Technical Field
The invention relates to the technical field of conductive materials, in particular to a graphene conductive material and a preparation method and application thereof.
Background
Black carbon-based paint has good light-shielding property and conductivity, and is generally used as a light-shielding, conductive or shielding material. The existing black carbon conductive paint has the following limitations: the surface resistance of most of the commercial carbon conductive coatings after film formation is between several omega/sq and hundreds of omega/sq, and the surface resistance is higher; after the coating is formed into a film, the reflectivity of visible light and near infrared bands can only be reduced to 5%, and the light shading and absorbing performance of the coating cannot meet the increasingly improved light absorbing requirement of a darkroom.
Disclosure of Invention
The invention provides a graphene conductive material and a preparation method and application thereof, which are used for overcoming the defects of high surface resistance, poor light shading and absorption performance and the like in the prior art.
In order to achieve the purpose, the invention provides a graphene conductive material which is of a layered structure and sequentially comprises a conductive layer, a shading layer and a base material from top to bottom; the conducting layer is a graphene coating, and the thickness of the conducting layer is less than 50 mu m; the shading layer is a titanium nitride coating, and the thickness of the shading layer is less than 20 mu m;
the surface resistance of the conductive material is less than 500m omega/sq, and the reflectivity of the conductive material in a wave band of 350-1400 nm is less than 2%.
In order to achieve the above object, the present invention further provides a method for preparing the graphene conductive material, including the following steps:
s1: weighing a first film forming substance, a solvent, a titanium nitride filler and a first auxiliary agent according to a mass ratio, placing the first film forming substance, the solvent, the titanium nitride filler and the first auxiliary agent in a container, and dispersing at a high speed of 1000-1500 r/min for 20-30 min to obtain a component A;
weighing a second film forming substance, a solvent, graphene and a second auxiliary agent according to the mass ratio, placing the second film forming substance, the solvent, the graphene and the second auxiliary agent in a container, and dispersing at a high speed of 1000-1500 r/min for 2-3 h to obtain a component C;
s2: weighing the component A and the component B according to the mass ratio, and dispersing the component A and the component B at a high speed of 800-1000 r/min for 10-15 min to obtain the titanium nitride coating;
weighing the component C and the component B according to the mass ratio, and dispersing the component C and the component B at a high speed of 800-1000 r/min for 10-15 min to obtain the graphene coating;
s3: and (3) sequentially blade-coating or spraying the titanium nitride coating and the graphene coating on the surface of the base material, and curing to form a film, so as to obtain the graphene conductive material.
In order to achieve the purpose, the invention further provides an application of the graphene conductive material, and the graphene conductive material or the graphene conductive material prepared by the preparation method of the graphene conductive material is applied to darkroom shading and electromagnetic shielding.
Compared with the prior art, the invention has the beneficial effects that:
1. the graphene conductive material provided by the invention is of a laminated structure and sequentially comprises a conductive layer, a shading layer and a base material from top to bottom; the conducting layer is a graphene coating, and the thickness of the conducting layer is less than 50 microns; the shading layer is a titanium nitride coating, and the thickness of the titanium nitride coating is less than 20 mu m; the surface resistance of the conductive material is less than 500m omega/sq, and the reflectivity of the conductive material in a wave band of 350-1400 nm is less than 2%. The conductive material has excellent conductivity, light shading and absorption performance and friction resistance, and is obviously superior to black conductive materials sold in the market. The concrete expression is as follows:
excellent conductivity: according to the invention, the graphene with high conductivity is used as a conductive material, the surface resistance of the graphene coating is less than 500m omega/sq, and the lowest surface resistance is about 300m omega/sq, so that the graphene coating is superior to a carbon conductive coating sold in the market.
Excellent light-shielding property and light-absorbing property: according to the invention, the black titanium nitride coating is used as a shading main body, the prepared graphene conductive material is light-tight, and the reflectivity of the graphene conductive material in a wave band of 350-1400 nm is 1-2%, so that the graphene conductive material is superior to a common shading material.
Excellent friction resistance: the existence of the flaky graphene in the conducting layer lubricates the surface of the coating, and the wear resistance is improved. And (3) carrying out a friction color fastness test (GB/T3920-.
2. The preparation method of the graphene conductive material provided by the invention is simple in process, and the prepared conductive material is excellent in shading effect and can be applied to the fields of darkroom shading, electromagnetic shielding and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a structural diagram of a black graphene conductive material provided in example 1.
The reference numbers illustrate: 1: a substrate; 2: a light-shielding layer; 3: and a conductive layer.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The drugs/reagents used are all commercially available without specific indication.
The invention provides a graphene conductive material which is of a layered structure and sequentially comprises a conductive layer, a shading layer and a base material from top to bottom; the conducting layer is a graphene coating, and the thickness of the conducting layer is less than 50 micrometers; the shading layer is a titanium nitride coating, and the thickness of the shading layer is less than 20 mu m;
the surface resistance of the conductive material is less than 500m omega/sq, and the reflectivity of the conductive material in a wave band of 350-1400 nm is less than 2%.
Preferably, the titanium nitride coating is prepared from a titanium nitride coating; the titanium nitride coating is black and has strong light absorption, and the light shading and light absorption performance of the coating can be improved.
The titanium nitride coating comprises a component A and a component B in a mass ratio of 100: 1-20;
the component A comprises, by mass, 30-50% of a first film forming substance, 20-30% of a solvent, 20-30% of a titanium nitride filler and 5-10% of a first auxiliary agent;
the component B is a curing agent. The component B is preferably a long-chain isocyanate curing agent commonly used in the market.
Preferably, the first film forming material is a two-component polyurethane or two-component epoxy resin having excellent adhesion and aging properties on a smooth non-polar substrate surface.
Preferably, the titanium nitride filler is black powder particles having a particle size of less than 50 nm. The surface of the particles is subjected to active treatment, and the particles are easy to disperse.
Preferably, the solvent is one of dimethylformamide, n-butyl acetate and ethanol; the first auxiliary agent only comprises two types of common inorganic pigment dispersing agents and adhesion promoters in the market. The addition of the inorganic pigment dispersant is beneficial to the dispersion of the titanium nitride filler so as to be beneficial to uniform film formation. The addition of the adhesion promoter improves the surface structure between the coating and the base material and between the coating and the coating, and improves the adhesion.
Preferably, the graphene coating is prepared from a graphene coating;
the graphene coating comprises a component C and a component B in a mass ratio of 100: 1-20;
the component C comprises, by mass, 40-50% of a second film forming substance, 20-30% of a solvent, 15-20% of graphene and 10-15% of a second auxiliary agent.
The component B is a curing agent.
Preferably, the second film forming material is one of two components of acrylic, polyurethane, fluororesin and silicone resin which are common, have excellent wrapping property and aging property, and are water-resistant and solvent-resistant after film formation;
in order to ensure the dispersibility of the shading paint and the conductivity of the conductive layer, the graphene is black particles, the average number of the particles is 5-6, and the size D50 of each single sheet is less than 1 mu m;
the second auxiliary agent comprises a special carbon dispersing agent, a surfactant, a flatting agent and an adhesion promoter. The carbon-based dispersing agent and the surfactant can change the surface activity of the graphene in a targeted manner, improve the dispersibility of the graphene in a solution and prevent agglomeration and precipitation. The flatting agent and the adhesion promoter optimize the appearance quality of the conductive layer and improve the adhesion between the conductive layer and the shading layer.
Preferably, the substrate is a material such as a grey fabric, a film, a wall or glass which can be coated with a coating.
The invention also provides a preparation method of the graphene conductive material, which comprises the following steps:
s1: weighing a first film forming substance, a solvent, a titanium nitride filler and a first auxiliary agent according to a mass ratio, placing the first film forming substance, the solvent, the titanium nitride filler and the first auxiliary agent in a container, and dispersing at a high speed of 1000-1500 r/min for 20-30 min to obtain a component A;
weighing a second film forming substance, a solvent, graphene and a second auxiliary agent according to the mass ratio, placing the second film forming substance, the solvent, the graphene and the second auxiliary agent in a container, and dispersing for 2-3 hours at a high speed of 1000-1500 r/min to obtain a component C;
s2: weighing the component A and the component B according to the mass ratio, and dispersing the component A and the component B at a high speed of 800-1000 r/min for 10-15 min to obtain a titanium nitride coating;
weighing the component C and the component B according to the mass ratio, and dispersing the component C and the component B at a high speed of 800-1000 r/min for 10-15 min to obtain the graphene coating;
s3: and (3) sequentially blade-coating or spraying the titanium nitride coating and the graphene coating on the surface of the base material, and curing to form a film, so as to obtain the graphene conductive material.
The specific procedures are as follows: mixing and dispersing, blade coating/spraying a shading layer, drying to form a film, blade coating/spraying a conductive layer, and drying to form a film.
The dry film weight gain of the shading layer is less than 10g/m 2 Dry film weight gain of the conductive layer is less than 25g/m 2 。
Preferably, in order to ensure that the component A and the component C are dispersed completely and uniformly and ensure the scraping coating or spraying quality, the fineness of the mixture after mixing is less than 1 mu m.
The invention also provides application of the graphene conductive material, and the graphene conductive material or the graphene conductive material prepared by the preparation method of the graphene conductive material is applied to darkroom shading and electromagnetic shielding.
Example 1
The present embodiment provides a black graphene conductive material, as shown in fig. 1, including a conductive layer 3, a light shielding layer 2 and a substrate 1.
The base material 1 is a transparent plastic film with the thickness of 1mm and the visible light transmittance of 0.8. In practical application, materials such as grey cloth, metal sheet materials, walls or glass can be selected as base materials.
The light shielding layer 2 is a black titanium nitride coating layer and is obtained by curing a titanium nitride coating to form a film. The light shielding layer 2 has a thickness less than 20 μm and functions to block and absorb light. The titanium nitride coating is formed by dispersing and mixing a first film forming substance, a solvent, titanium nitride, a first auxiliary agent and a curing agent B. The curing agent B is a long-chain isocyanate curing agent. The first film forming substance is one of bi-component polyurethane or bi-component epoxy resin; the solvent is one of dimethylformamide, n-butyl acetate and ethanol; the second auxiliary agent is a commercially available inorganic pigment dispersant and an adhesion promoter; the titanium nitride is black powder, the particle size is less than 50nm, and the surface is subjected to active treatment and is easy to disperse.
The conducting layer 3 is a graphene coating and is obtained by curing and film-forming the graphene coating. The thickness of the conductive layer 3 is less than 50 μm, and the surface resistance of the coating is less than 500m omega/sq. The graphene coating is prepared by fully dispersing and mixing a second film forming substance, a solvent, graphene, a second auxiliary agent and a curing agent B. The second film forming substance is one of bi-component acrylic acid, polyurethane, fluororesin and silicone resin; the second auxiliary agent is a special carbon dispersant, a surfactant, a flatting agent and an adhesion promoter sold in the market; the graphene is black particles, the average number of the particles is 5-6, and the single-piece layer size D50 is smaller than 1 mu m.
And sequentially carrying out blade coating or spraying on the surface of the substrate 1 by using the black titanium nitride shading paint and the graphene conductive paint, and controlling the thickness and weight of the coating to obtain the black graphene conductive material with low surface resistance and reflectivity. After the light shielding layer is solidified to form a film, the weight of the dry film of the light shielding layer is increased by less than 10g/m 2 Dry film weight gain of the conductive layer of less than 25g/m 2 。
The embodiment also provides a preparation method of the black graphene conductive material, which comprises the following steps:
s1: weighing a first film forming substance, a solvent, a titanium nitride filler and a first auxiliary agent according to a mass ratio of 30-50: 20-30: 5-10, placing the first film forming substance, the solvent, the titanium nitride filler and the first auxiliary agent in a container, and dispersing at a high speed of 1500r/min for 30min to obtain a component A;
weighing a second film forming substance, a solvent, graphene and a second auxiliary agent according to a mass ratio of 40-50: 20-30: 15-20: 10-15, placing the second film forming substance, the solvent, the graphene and the second auxiliary agent in a container, and dispersing at a high speed of 1500r/min for 2.5 hours to obtain a component C;
s2: weighing the component A and the component B according to the mass ratio of 100: 1-20, and dispersing the component A and the component B at a high speed of 1000r/min for 15min to obtain a titanium nitride coating;
weighing the component C and the component B according to the mass ratio of 100: 1-20, and dispersing the component C and the component B at a high speed of 1000r/min for 15min to obtain graphene coating;
s3: and (3) sequentially blade-coating or spraying the titanium nitride coating and the graphene coating on the surface of the base material, and curing to form a film, so as to obtain the graphene conductive material.
Example 2
The embodiment provides a black graphene conductive material, which comprises a base material, a shading layer and a conductive layer; the shading layer is a titanium nitride coating, and the conducting layer is a graphene coating; the black titanium nitride coating comprises a component A1 and a component B in a mass ratio of 100:1, wherein the component A1 comprises double-component polyurethane, a solvent, nano titanium nitride and a first auxiliary agent; the component B is long-chain isocyanate, and the using amount of the component B is 1 wt% of that of the component A1; the graphene coating comprises a C1 component and a B component in a mass ratio of 100:1, wherein the C1 component comprises bicomponent polyurethane, a solvent, graphene and a second auxiliary agent. In this example, various coatings were formulated according to the formulation of Table 1.
TABLE 1 ingredient table
Figure BDA0003389768150000081
The embodiment also provides a preparation method of the black graphene conductive material, which comprises the following steps:
s1: weighing polyurethane, DMF, nano titanium nitride and a first auxiliary agent according to the mass ratio of 40:25:30:5, placing the materials in a container, and dispersing the materials at a high speed of 1500r/min for 30min to obtain an A1 component;
weighing polyurethane, DMF, graphene and a second auxiliary agent according to the mass ratio of 45:30:15:10, placing the materials in a container, and dispersing the materials at a high speed of 1500r/min for 2.5h to obtain a component C1;
s2: weighing the component A1 and the component B according to the mass ratio of 100:1, and dispersing the component A1 and the component B at a high speed of 1000r/min for 15min to obtain black shading titanium nitride coating with the fineness less than 1 mu m;
weighing the C1 component and the B component according to the mass ratio of 100:1, and dispersing the C1 component and the B component at a high speed of 1000r/min for 15min to obtain the graphene coating with the fineness of 1 mu m;
s3: the prepared black shading titanium nitride coating is coated on the surface of the transparent film by using four specification wire bars of No. 1, No. 2, No. 3 and No. 4 to obtain the coating with the weight gain of 9.5g/m 2 、7.4g/m 2 、5.5g/m 2 、4.1g/m 2 Light-shielding layer examples 1 to 4 and an increase in weight of 0g/m 2 Comparative example 1 without blade coating of light shading layer.
Coating conductive paint on the surface of the shading layer by using a No. 5 wire rod in a scraping manner, heating and curing to obtain a conductive layer with a uniform and flat surface and no light, wherein the weight of the conductive layer is increased by 15g/m 2 Left and right. The results of color, reflectance, and tribological properties of the conductive material are shown in table 2. With the increase of the black shading layer in the conductive material, the shading performance of the black titanium nitride material is enhanced, the color of the surface of the material gradually becomes black, and meanwhile, the reflectivity and the transmittance of the material become small; because the existence of graphite alkene in the conducting layer has reduced surface resistance, simultaneously because graphite alkene is the lamellar structure, has lubricated the coating surface, has improved the wear resistance of coating.
Table 2 table of performance of graphene conductive material
Figure BDA0003389768150000101
Example 3
The embodiment provides a black graphene conductive material, which comprises a base material, a shading layer and a conductive layer; the shading layer is a titanium nitride coating, and the conducting layer is a graphene coating; the titanium nitride coating comprises a component A2 and a component B in a mass ratio of 100:5, wherein the component A2 comprises a two-component epoxy resin, a solvent, nano titanium nitride and a first auxiliary agent; the component B is long-chain isocyanate, and the using amount of the component B is 5 wt% of that of the component A2; the graphene coating comprises a C2 component and a B component in a mass ratio of 100:10, wherein the C2 component comprises bicomponent acrylic acid, a solvent, graphene and a second auxiliary agent. In this example, various coatings were formulated according to the formulations in Table 3.
TABLE 3 ingredient table
Figure BDA0003389768150000111
The embodiment also provides a preparation method of the black graphene conductive material, which comprises the following steps:
s1: weighing epoxy resin, ethanol, nano titanium nitride and a first auxiliary agent according to the mass ratio of 35:30:30:5, placing the epoxy resin, the ethanol, the nano titanium nitride and the first auxiliary agent in a container, and dispersing at a high speed of 1500r/min for 30min to obtain an A2 component;
weighing acrylic acid, n-butyl acetate, graphene and a second auxiliary agent according to the mass ratio of 50:25:15:10, placing the materials in a container, and dispersing at a high speed of 1500r/min for 2.5h to obtain a component C2;
s2: weighing the component A2 and the component B according to the mass ratio of 100:5, and dispersing the component A2 and the component B at a high speed of 1000r/min for 15min to obtain black shading titanium nitride coating with the fineness less than 1 mu m;
weighing a C2 component and a B component according to a mass ratio of 100:10, and dispersing the C2 component and the B component at a high speed of 1000r/min for 15min to obtain the graphene coating with the fineness of 1 mu m;
s3: the prepared black shading titanium nitride coating is coated on the surface of the transparent film by using a wire rod with four specifications of No. 1, No. 2, No. 3 and No. 4, and the obtained weight gain is 8.9g/m 2 、7.2g/m 2 、6.5g/m 2 、4.5g/m 2 Light-shielding layer of (1) examples 5 to 8 and an increased weight of 0g/m 2 Comparative example 2, where the light shading layer was not drawn. Carrying out blade coating on the surface of the light shielding layer with a 5# wire bar to obtain a flat and smooth conductive layer, heating and curing to obtain a flat and dull conductive layer, wherein the weight of the conductive layer is increased by about 15g/m 2 . The results of color, reflectance, and tribological properties of the conductive material are shown in table 4. Black nitrogen in the conductive material along with the increase of the black shading layerThe shading performance of the titanium oxide material is enhanced, the color of the surface of the material gradually becomes black, and meanwhile, the reflectivity and the transmittance of the material become small; the surface resistance is reduced due to the existence of the graphene in the conducting layer, and meanwhile, the surface of the coating is lubricated due to the flaky structure of the graphene, so that the wear resistance of the coating is improved.
Table 4 performance table of graphene conductive material
Figure BDA0003389768150000121
The test result of the embodiment shows that the black graphene conductive material has the following advantages:
excellent conductivity: the graphene with high conductivity is used as a conductive material, the surface resistance of the material can be as low as about 300m omega/sq, and the material is superior to common carbon conductive coatings.
Excellent light-shielding property and light-absorbing property: the black titanium nitride coating is used as a shading main body, the prepared black graphene conductive material is light-tight, the reflectivity of the black graphene conductive material in a wave band of 350-1400 nm is 1-2%, and the black graphene conductive material is superior to a common shading material.
Excellent friction resistance: the existence of the flaky graphene in the conducting layer lubricates the surface of the coating, and the wear resistance is improved. And (3) carrying out a friction color fastness test (GB/T3920-.
The construction is convenient: the paint produced by the invention can be directly sprayed or blade-coated on the flat-grained cloth, plastic film, wall, glass, metal plate and other surfaces with flat surfaces, and the process is simple.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.

Claims (9)

1. The application of the graphene conductive material is characterized in that the graphene conductive material is applied to darkroom shading and electromagnetic shielding; the conductive material is of a laminated structure and sequentially comprises a conductive layer, a shading layer and a base material from top to bottom; the conducting layer is a graphene coating, and the thickness of the conducting layer is less than 50 micrometers; the shading layer is a titanium nitride coating, and the thickness of the shading layer is less than 20 mu m;
the surface resistance of the conductive material is less than 500m omega/sq, and the reflectivity of the conductive material in a wave band of 350-1400 nm is less than 2%.
2. The application of the graphene conductive material as claimed in claim 1, wherein the titanium nitride coating is prepared from a titanium nitride coating;
the titanium nitride coating comprises a component A and a component B in a mass ratio of 100: 1-20;
the component A comprises, by mass, 30-50% of a first film forming substance, 20-30% of a solvent, 20-30% of a titanium nitride filler and 5-10% of a first auxiliary agent;
the component B is a curing agent.
3. The use of the graphene conductive material according to claim 2, wherein the first film forming substance is a two-component polyurethane or a two-component epoxy resin.
4. The use of the graphene conductive material according to claim 2, wherein the titanium nitride filler is black powder particles having a particle size of less than 50 nm.
5. The use of the graphene conductive material according to claim 2, wherein the solvent is one of dimethylformamide, n-butyl acetate and ethanol; the first auxiliary agent comprises a dispersing agent and an adhesion promoter.
6. The application of the graphene conductive material as claimed in claim 1, wherein the graphene coating is prepared from a graphene paint;
the graphene coating comprises a component C and a component B in a mass ratio of 100: 1-20;
the component C comprises, by mass, 40-50% of a second film forming substance, 20-30% of a solvent, 15-20% of graphene and 10-15% of a second auxiliary agent.
7. The use of the graphene conductive material according to claim 6, wherein the second film-forming substance is one of two-component acrylic, polyurethane, fluororesin, and silicone;
the graphene is black particles, the average number of the particles is 5-6, and the single-piece lamination size D50 is smaller than 1 mu m;
the second auxiliary agent comprises a special carbon dispersing agent, a surfactant, a flatting agent and an adhesion promoter.
8. The preparation method of the graphene conductive material in the application of the graphene conductive material as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
s1: weighing a first film forming substance, a solvent, a titanium nitride filler and a first auxiliary agent according to a mass ratio, placing the first film forming substance, the solvent, the titanium nitride filler and the first auxiliary agent in a container, and dispersing at a high speed of 1000-1500 r/min for 20-30 min to obtain a component A;
weighing a second film forming substance, a solvent, graphene and a second auxiliary agent according to the mass ratio, placing the second film forming substance, the solvent, the graphene and the second auxiliary agent in a container, and dispersing at a high speed of 1000-1500 r/min for 2-3 h to obtain a component C;
s2: weighing the component A and the component B according to the mass ratio, and dispersing the component A and the component B at a high speed of 800-1000 r/min for 10-15 min to obtain a titanium nitride coating;
weighing the component C and the component B according to the mass ratio, and dispersing the component C and the component B at a high speed of 800-1000 r/min for 10-15 min to obtain a graphene coating;
s3: and (3) sequentially blade-coating or spraying the titanium nitride coating and the graphene coating on the surface of the base material, and curing to form a film, so as to obtain the graphene conductive material.
9. The method of claim 8, wherein the fineness of the dispersed components A and C is less than 1 μm.
CN202111464575.5A 2021-12-02 2021-12-02 Graphene conductive material and preparation method and application thereof Active CN114085412B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111464575.5A CN114085412B (en) 2021-12-02 2021-12-02 Graphene conductive material and preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111464575.5A CN114085412B (en) 2021-12-02 2021-12-02 Graphene conductive material and preparation method and application thereof

Publications (2)

Publication Number Publication Date
CN114085412A CN114085412A (en) 2022-02-25
CN114085412B true CN114085412B (en) 2022-08-19

Family

ID=80306393

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111464575.5A Active CN114085412B (en) 2021-12-02 2021-12-02 Graphene conductive material and preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN114085412B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102061117A (en) * 2010-12-06 2011-05-18 上海奇鸣涂料有限公司 Coating composition coated on glass surfaces and preparation method thereof
US20190283377A1 (en) * 2018-03-19 2019-09-19 Nanotek Instruments, Inc. Conductive graphene mixture-mediated metallization of polymer article
CN109468042A (en) * 2018-10-15 2019-03-15 湖南湘贤科技有限公司 A kind of graphene aqueous self-drying polyurethane electric conduction paint
CN111454478B (en) * 2020-03-28 2022-09-30 南京诺邦新材料有限公司 Shading film for aircraft porthole shading curtain

Also Published As

Publication number Publication date
CN114085412A (en) 2022-02-25

Similar Documents

Publication Publication Date Title
KR100236154B1 (en) Coating solution for forming a transparent and electrically conductive film
DE69720122T2 (en) Water-repellent coating, process for its production, and its use in coatings and for coated objects
JP2985286B2 (en) Flake glass having dense protective coating layer, method for producing the same, and paint containing the flake glass
CN110449329A (en) A kind of preparation method of the non-iris schemochrome film of super-hydrophobicity
US20020037398A1 (en) Transparent conductive layered structure and method of producing the same, and transparent coat layer forming coating liquid used in the method of producing the same, and display device to which transparent conductive layered structure is applied
JP4332610B2 (en) Composition containing metal nanorod and metal oxide powder and use thereof
CN108485361A (en) A kind of infrared low-emissivity coating of graphene-containing
CN111748270B (en) Coating for projection screen and preparation method thereof
JP4389368B2 (en) Conductive pigment powder and transparent conductive film made using the same
KR20060052824A (en) Powder coating precursors and the use thereof in powder coating compositions
JP3266323B2 (en) Composite functional materials
JP2008135417A (en) Method of forming electrode in solar cell, and the solar cell using electrode obtained by the same
CN114085412B (en) Graphene conductive material and preparation method and application thereof
JP2011034708A (en) Transparent conductive sheet
WO2005063645A1 (en) Substrates with a transparent, reflecting metal oxide partial coating, production and use thereof
JP3272111B2 (en) Paint for forming low refractive index film, antistatic / antireflective film, transparent laminate with antistatic / antireflective film, and cathode ray tube
JP6127943B2 (en) Aqueous silver colloidal liquid, method for producing the same, and paint using aqueous silver colloidal liquid
CN117402509A (en) ATO coated silver powder composite material, preparation method thereof and infrared stealth coating
KR20100084991A (en) Transparent conductive film and method of producing the same
JP3002327B2 (en) Paint for forming conductive / high refractive index film and transparent material laminate with conductive / high refractive index film
JP3478589B2 (en) Paint for forming conductive / high-refractive-index film and transparent laminate with conductive / anti-reflective coating obtained therefrom
CN114232352B (en) Flexible conductive cloth and preparation method thereof
JPH1180596A (en) Masking agent and formation of patterned film
JP2859783B2 (en) Paint for forming antistatic / high refractive index film, transparent material laminate with antistatic / antireflective film and display device
JPH10204336A (en) Coating material for forming transparent conductive film, low-reflectance transparent conductive film, and display

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant