CN111959081A - Graphene electrothermal film and preparation method thereof - Google Patents

Graphene electrothermal film and preparation method thereof Download PDF

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CN111959081A
CN111959081A CN202010872162.XA CN202010872162A CN111959081A CN 111959081 A CN111959081 A CN 111959081A CN 202010872162 A CN202010872162 A CN 202010872162A CN 111959081 A CN111959081 A CN 111959081A
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layer
graphene
parts
protective layer
coating
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徐继辉
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Abstract

The invention provides a graphene electrothermal film, and relates to the technical field of electrothermal films. Include by last upper protective layer that sets gradually under to, graphite alkene electric heat layer, heat preservation and lower protective layer, above-mentioned graphite alkene electric heat layer includes basic unit and graphite alkene coating, one side that above-mentioned basic unit is close to above-mentioned upper protective layer is equipped with a plurality of recesses, one side that above-mentioned upper protective layer is close to above-mentioned basic unit is equipped with above-mentioned recess complex lug, can derive the heat through above-mentioned graphite alkene coating during the use, recycle above-mentioned heat preservation and improve one-way calorific capacity, above-mentioned recess and above-mentioned lug can make above-mentioned upper protective layer and above-mentioned graphite alkene electric heat layer combine inseparabler. In addition, the invention also provides a preparation method of the graphene electrothermal film, which comprises the steps of paint preparation, heat insulation layer preparation, graphene electrothermal layer preparation and finished product preparation, and has the advantages of simple flow, cost saving, convenient production and easy use.

Description

Graphene electrothermal film and preparation method thereof
Technical Field
The invention relates to the technical field of electrothermal films, in particular to a graphene electrothermal film and a preparation method thereof.
Background
Graphene (Graphene) is a polymer made of carbon atoms in sp2The hybrid tracks form a hexagonal honeycomb lattice two-dimensional carbon nanomaterial. The arrangement mode of carbon atoms in the graphene is bonded by sp2 hybridization orbitals like a graphite monoatomic layer, and the graphene has the following characteristics: the carbon atom has 4 valence electrons, wherein 3 electrons generate sp2 bonds, that is, each carbon atom contributes an unbound electron located on the pz orbital, the pz orbitals of neighboring atoms form pi bonds in a direction perpendicular to the plane, and the newly formed pi bonds are in a half-filled state. Research proves that the coordination number of carbon atoms in graphene3, the bond length between every two adjacent carbon atoms is 1.42X 10-10 m, and the included angle between the bonds is 120 degrees. In addition to the honeycomb-like layered structure in which the σ bond is linked to other carbon atoms to form a hexagonal ring, the pz orbital of each carbon atom perpendicular to the plane of the layer can form a large pi bond (similar to a benzene ring) of multiple atoms throughout the layer, thus having excellent electrical and optical properties, and also having excellent thermal conductivity.
The electrothermal film is divided into high-temperature and low-temperature electrothermal films. The high-temperature electrothermal film is generally used for electronic appliances, military affairs and the like, and is produced by the present science and technology. The electrothermal film heating system is different from a point heating system represented by a radiator, an air conditioner and a radiator and a line heating system represented by a heating cable, and is a low-carbon heating high-tech product researched and developed by adopting the modern aerospace technology in the field of surface heating. The traditional electrothermal film has poor heat conduction capability and heat preservation capability and poor heating effect.
Disclosure of Invention
The invention aims to provide a graphene electrothermal film which is provided with a graphene coating and a heat insulation layer, so that heat can be conducted and dissipated fully by utilizing the graphene coating, heat loss can be reduced by the heat insulation layer, and the heating effect is improved.
The invention also aims to provide a preparation method of the graphene electrothermal film, which is simple in preparation process, beneficial to production and convenient to use.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
In a first aspect, an embodiment of the present invention provides a graphene electrothermal film, which includes an upper protective layer, a graphene electrothermal layer, a thermal insulation layer, and a lower protective layer, which are sequentially disposed from top to bottom, wherein the graphene electrothermal layer includes a base layer and a graphene coating layer, the graphene coating layer is located between the base layer and the upper protective layer, a plurality of grooves are disposed on one side of the base layer close to the upper protective layer, and bumps fitted with the grooves are disposed on one side of the upper protective layer close to the base layer.
Further, in some embodiments of the present invention, the graphene coating includes the following raw materials: graphene, aqueous fluorocarbon resin, calcium dinonylnaphthalenesulfonate, deionized water, an auxiliary agent and an adhesive.
Further, in some embodiments of the present invention, the graphene coating includes the following raw materials by weight: 50-80 parts of graphene, 35-50 parts of waterborne fluorocarbon resin, 5-15 parts of calcium dinonylnaphthalenesulfonate, 100 parts of deionized water, 10-30 parts of an auxiliary agent and 10-30 parts of a binder.
Further, in some embodiments of the present invention, the additive is one or more of an antifoaming agent, a leveling agent, a film forming additive, an adhesion promoter, a substrate wetting agent, an antifreeze, and a mildewproof agent.
Further, in some embodiments of the present invention, the adhesive is one or more of a water-based epoxy resin, a water-based acrylic resin, and a water-based polyurethane.
Further, in some embodiments of the present invention, the insulating layer is made of the following raw materials: silicone-acrylic resin, aqueous fluorocarbon resin, mixed resin and expanded and vitrified micro bubbles.
Further, in some embodiments of the present invention, the insulating layer is made of the following raw materials by weight: 10-15 parts of silicone-acrylic resin, 10-15 parts of waterborne fluorocarbon resin, 20-30 parts of mixed resin and 5-15 parts of expanded and vitrified micro-beads.
Further, in some embodiments of the present invention, the upper protective layer and the lower protective layer are both PET resin films.
In a second aspect, an embodiment of the present invention provides a method for preparing the above graphene electrothermal film, which includes the following steps:
preparing the coating: adding deionized water into the aqueous fluorocarbon resin, stirring and mixing, then adding graphene, calcium dinonylnaphthalenesulfonate and an auxiliary agent, mixing and dispersing, then adding an adhesive, and stirring to obtain the graphene coating;
preparing a heat insulation layer: adding water-based fluorocarbon resin into the silicone-acrylic resin, stirring and mixing, adding the expanded and vitrified micro bubbles, mixing, adding the mixed resin, stirring and mixing, and blow-molding to form a heat-insulating layer;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer;
and (3) preparing a finished product: and connecting the upper protection layer, the graphene electric heating layer, the heat insulation layer and the lower protection layer in sequence to obtain a finished product.
Further, in some embodiments of the present invention, in the step of preparing the finished product, the upper protection layer, the graphene electrothermal layer, the insulating layer, and the lower protection layer are sequentially bonded by using high temperature resistant glue to obtain the finished product.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
aiming at the first aspect, a graphene electrothermal film is provided, which comprises an upper protective layer, a graphene electrothermal layer, a heat preservation layer and a lower protective layer which are sequentially arranged from top to bottom, wherein the graphene electrothermal layer comprises a base layer and a graphene coating, the graphene coating is positioned between the base layer and the upper protective layer, one side of the base layer, which is close to the upper protective layer, is provided with a plurality of grooves, and one side of the upper protective layer, which is close to the base layer, is provided with a convex block matched with the grooves.
The graphene electrothermal film comprises an upper protective layer, a graphene electrothermal layer, a heat preservation layer and a lower protective layer which are sequentially arranged from top to bottom, wherein the graphene electrothermal layer comprises a base layer and a graphene coating, the graphene coating is positioned between the base layer and the upper protective layer, so that heat can be led out through the graphene coating when in use, the heat is stored and reflected to the lower side of the graphene electrothermal film by utilizing the heat preservation layer, the heat is uniformly dissipated to the upper side of the graphene electrothermal film, unidirectional heat productivity is improved, meanwhile, because a plurality of grooves are arranged on one side of the base layer close to the upper protective layer, and a lug matched with the groove is arranged on one side of the upper protective layer close to the base layer, so that the upper protective layer and the graphene electrothermal layer can be combined more tightly when in use, above-mentioned recess and above-mentioned lug also can promote the heat radiating area on graphite alkene electric heat layer to strengthen the result of use, above-mentioned upper protective layer and above-mentioned lower protective layer can play insulating protection from the usefulness, increase of service life, simple structure, easily use.
Aiming at the second aspect, a method for preparing the graphene electrothermal film is provided, which comprises the following steps: the preparation method comprises the steps of coating preparation, heat insulation layer preparation, graphene electric heating layer preparation and finished product preparation.
According to the preparation method of the graphene electrothermal film, the graphene coating and the heat-insulating layer are respectively prepared through the coating preparation step and the heat-insulating layer preparation step, the graphene coating is coated on the surface of a base layer through the graphene electrothermal layer preparation step, the graphene electrothermal layer is prepared after drying, and the upper protective layer, the graphene electrothermal layer, the heat-insulating layer and the lower protective layer are sequentially connected through the finished product preparation step to prepare a finished product; the preparation method has the advantages of simple preparation steps, cost saving, convenient production and easy use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a graphene electrothermal film according to an embodiment of the present invention;
icon: 1-upper protective layer; 11-a bump; 2-a graphene electrothermal layer; 22-a groove; 3, insulating layer; 4-lower protective layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to specific examples.
The utility model provides a graphite alkene electric heat membrane, its includes by last upper protective layer 1, graphite alkene electric heat layer 2, heat preservation 3 and the lower protective layer 4 that sets gradually under to, above-mentioned graphite alkene electric heat layer 2 includes basic unit and graphite alkene coating, above-mentioned graphite alkene coating is located above-mentioned basic unit and above-mentioned between the upper protective layer 1, one side that above-mentioned basic unit is close to above-mentioned upper protective layer 1 is equipped with a plurality of recesses 22, one side that above-mentioned upper protective layer 1 is close to above-mentioned basic unit is equipped with above-mentioned recess 22 complex lug 11.
In the above embodiment, because the graphene electrothermal film comprises an upper protective layer 1, a graphene electrothermal layer 2, a heat preservation layer 3 and a lower protective layer 4 which are sequentially arranged from top to bottom, the graphene electrothermal layer 2 comprises a base layer and a graphene coating, the graphene coating is positioned between the base layer and the upper protective layer 1, when in use, heat can be led out through the graphene coating, the heat which is dissipated to the lower side of the graphene electrothermal film is stored and reflected back by the heat preservation layer 3, so that the heat is uniformly dissipated to the upper side of the graphene electrothermal film, unidirectional heat productivity is improved, meanwhile, because a plurality of grooves 22 are arranged on one side of the base layer close to the upper protective layer 1, and bumps 11 which are matched with the grooves 22 are arranged on one side of the upper protective layer 1 close to the base layer, when in use, the upper protective layer 1 and the graphene electrothermal layer 2 can be combined more tightly, the groove 22 and the bump 11 can also increase the heat dissipation area of the graphene electrothermal layer 2, so that the use effect is enhanced, the upper protective layer 1 and the lower protective layer 4 can be used for insulation protection, the service life is prolonged, the structure is simple, and the use is easy.
In some embodiments of the present invention, the graphene coating comprises the following raw materials: graphene, aqueous fluorocarbon resin, calcium dinonylnaphthalenesulfonate, deionized water, an auxiliary agent and an adhesive.
In the above embodiment, the graphene coating includes the following raw materials: the heat-conducting paint comprises graphene, water-based fluorocarbon resin, calcium dinonylnaphthalene sulfonate, deionized water, an auxiliary agent and an adhesive, wherein the graphene plays a heat-conducting role; the water-based fluorocarbon resin plays a role in forming a film by the coating; calcium dinonyl naphthalene sulfonate is used as a surfactant and plays a role in catalyzing the coating; deionized water is used as a solvent and a diluent; the auxiliary agent plays a role in assisting film formation; the adhesive plays roles in thickening, bonding and curing, and the graphene coating can be better prepared by using the raw materials, so that the coating performance is improved, and the production is facilitated.
In some embodiments of the present invention, the graphene coating includes the following raw materials by weight: 50-80 parts of graphene, 35-50 parts of waterborne fluorocarbon resin, 5-15 parts of calcium dinonylnaphthalenesulfonate, 100 parts of deionized water, 10-30 parts of an auxiliary agent and 10-30 parts of a binder.
In the embodiment, the graphene coating can be better molded by the component preparation, the performance is better improved, and the preparation is more convenient.
In some embodiments of the present invention, the additive is one or more of an antifoaming agent, a leveling agent, a film-forming additive, an adhesion promoter, a substrate wetting agent, an antifreezing agent, and a mildew inhibitor.
In the embodiment, one or more of the antifoaming agent, the leveling agent, the film forming assistant, the adhesion promoter, the base material wetting agent, the antifreezing agent and the mildewproof agent can be used for assisting in forming a film better, so that the product performance is improved, and the production is facilitated.
In some embodiments of the present invention, the adhesive is one or more of a water-based epoxy resin, a water-based acrylic resin, and a water-based polyurethane.
In the embodiment, one or more adhesives selected from waterborne epoxy resin, waterborne acrylic resin and waterborne polyurethane can be used for better thickening, bonding and curing, so that the product performance can be better improved, the use is more convenient, and the production is facilitated.
In some embodiments of the present invention, the insulating layer 3 is made of the following materials: silicone-acrylic resin, aqueous fluorocarbon resin, mixed resin and expanded and vitrified micro bubbles.
In the above embodiment, the insulating layer 3 is made of the following raw materials: the silicon-acrylic resin, the aqueous fluorocarbon resin, the mixed resin and the expanded and vitrified micro-beads, wherein the silicon-acrylic resin and the aqueous fluorocarbon resin are taken as film forming base materials; the mixed resin plays roles of bonding, thickening and curing; the expanded and vitrified micro bubbles are used as heat-insulating filler, the heat-insulating layer 3 can be better prepared by using the raw materials, the heat-insulating property is improved, the use is more convenient, and the production is facilitated.
In some embodiments of the present invention, the insulating layer 3 is made of the following raw materials by weight: 10-15 parts of silicone-acrylic resin, 10-15 parts of waterborne fluorocarbon resin, 30-50 parts of mixed resin and 5-15 parts of expanded and vitrified micro-beads.
In some embodiments of the present invention, the mixed resin comprises a conductive epoxy resin and an acrylic resin, and the ratio of the components of the conductive epoxy resin to the acrylic resin is equal to 1: 1-3.
In the embodiment, the mixed resin with the component ratio of the conductive epoxy resin to the acrylic resin being 1:1-3 is used, so that the effects of adhesion, thickening and curing can be better achieved, the product performance can be better enhanced, and the production is facilitated.
In the embodiment, the heat-insulating layer 3 can be prepared better than the components, so that the heat-insulating performance is increased, the use is more convenient, and the production is facilitated.
In some embodiments of the present invention, the upper protective layer 1 and the lower protective layer 4 are both PET resin films.
In the above-mentioned embodiment, through using PET resin to make above-mentioned upper protective layer 1 and above-mentioned lower protection film, the effect that plays insulation protection that can be better prolongs product life, and it is more convenient to use, is of value to production.
A method for preparing the graphene electrothermal film comprises the following steps:
preparing the coating: adding deionized water into the aqueous fluorocarbon resin, stirring and mixing, then adding graphene, calcium dinonylnaphthalenesulfonate and an auxiliary agent, mixing and dispersing, then adding an adhesive, and stirring to obtain the graphene coating;
preparing a heat insulation layer: adding water-based fluorocarbon resin into the silicone-acrylic resin, stirring and mixing, adding the expanded and vitrified micro bubbles, mixing, adding the mixed resin, stirring and mixing, and blow-molding to form the heat-insulating layer 3;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
In the above embodiment, according to the graphene electrothermal film preparation method, the graphene coating and the insulating layer 3 are respectively prepared through the coating preparation step and the insulating layer preparation step, the graphene coating is coated on the surface of a base layer through the graphene electrothermal layer preparation step, the graphene electrothermal layer 2 is prepared after drying, and the upper protective layer 1, the graphene electrothermal layer 2, the insulating layer 3 and the lower protective layer 4 are sequentially connected through the finished product preparation step to prepare a finished product; the preparation method has the advantages of simple preparation steps, cost saving, convenient production and easy use.
In some embodiments of the present invention, in the step of preparing the finished product, the upper protection layer 1, the graphene electrothermal layer 2, the insulating layer 3, and the lower protection layer 4 are sequentially bonded with high temperature resistant glue to obtain the finished product.
In the above embodiment, the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 are sequentially bonded by using high temperature resistant glue, so that the product bonding is tighter, the high temperature resistance is improved, the service life is prolonged, and the use is more convenient.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
Preparing the coating: adding 100 parts of deionized water into 35 parts of aqueous fluorocarbon resin, stirring and mixing, then adding 50 parts of graphene, 5 parts of calcium dinonylnaphthalenesulfonate and 10 parts of an auxiliary agent, mixing and dispersing, then adding 10 parts of an adhesive, and stirring to obtain the graphene coating, wherein the auxiliary agent comprises a film-forming auxiliary agent; the adhesive comprises a waterborne epoxy resin;
preparing a heat insulation layer: taking 10-15 parts of silicone-acrylic resin, adding 10-15 parts of waterborne fluorocarbon resin, stirring and mixing, adding 5-15 parts of expanded and vitrified micro bubbles, mixing, adding 20-30 parts of mixed resin, stirring and mixing, and blowing to form the heat insulation layer 3, wherein the mixed resin comprises conductive epoxy resin and acrylic resin, and the ratio of the conductive epoxy resin to the acrylic resin is 1: 1;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
Example 2
Preparing the coating: taking 50 parts of water-based fluorocarbon resin, adding 200 parts of deionized water, stirring and mixing, then adding 80 parts of graphene, 15 parts of calcium dinonylnaphthalene sulfonate and 30 parts of an auxiliary agent, mixing and dispersing, then adding 30 parts of an adhesive, and stirring to prepare the graphene coating, wherein the auxiliary agent is a defoaming agent, a film-forming auxiliary agent, a substrate wetting agent and a mildew preventive; the adhesive is water-based epoxy resin and water-based acrylic resin;
preparing a heat insulation layer: adding 15 parts of waterborne fluorocarbon resin into 15 parts of silicone-acrylic resin, stirring and mixing, adding 15 parts of expanded and vitrified micro bubbles, mixing, adding 30 parts of mixed resin, stirring and mixing, and blow-molding to form the heat-insulating layer 3, wherein the mixed resin comprises conductive epoxy resin and acrylic resin, and the ratio of the conductive epoxy resin to the acrylic resin is 1: 3;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
Example 3
Preparing the coating: adding 150 parts of deionized water into 40 parts of aqueous fluorocarbon resin, stirring and mixing, then adding 65 parts of graphene, 10 parts of calcium dinonylnaphthalenesulfonate and 20 parts of auxiliary agent, mixing and dispersing, then adding 20 parts of adhesive, and stirring to obtain the graphene coating, wherein the auxiliary agent is a defoaming agent, a leveling agent, a film-forming auxiliary agent, an antifreezing agent and a mildew preventive; the adhesive is water-based epoxy resin, water-based acrylic resin and water-based polyurethane;
preparing a heat insulation layer: adding 12 parts of waterborne fluorocarbon resin into 12 parts of silicone-acrylic resin, stirring and mixing, adding 10 parts of expanded and vitrified micro bubbles, mixing, adding 25 parts of mixed resin, stirring and mixing, and blow-molding to form the heat-insulating layer 3, wherein the mixed resin comprises conductive epoxy resin and acrylic resin, and the ratio of the conductive epoxy resin to the acrylic resin is 1: 2;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
Example 4
Preparing the coating: adding 180 parts of deionized water into 45 parts of aqueous fluorocarbon resin, stirring and mixing, then adding 70 parts of graphene, 12 parts of calcium dinonylnaphthalenesulfonate and 25 parts of auxiliary agent, mixing and dispersing, then adding 25 parts of adhesive, and stirring to obtain the graphene coating, wherein the auxiliary agent is a defoaming agent, a film-forming auxiliary agent, an adhesion promoter and a substrate wetting agent; the adhesive is water-based epoxy resin, water-based acrylic resin and water-based polyurethane;
preparing a heat insulation layer: adding 18 parts of waterborne fluorocarbon resin into 18 parts of silicone-acrylic resin, stirring and mixing, adding 12 parts of expanded and vitrified micro bubbles, mixing, adding 28 parts of mixed resin, stirring and mixing, and blow-molding to form the heat-insulating layer 3, wherein the mixed resin comprises conductive epoxy resin and acrylic resin, and the ratio of the conductive epoxy resin to the acrylic resin is 1: 3;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
Example 5
Preparing the coating: taking 42 parts of aqueous fluorocarbon resin, adding 120 parts of deionized water, stirring and mixing, then adding 60 parts of graphene, 8 parts of calcium dinonylnaphthalenesulfonate and 15 parts of auxiliary agent, mixing and dispersing, then adding 15 parts of adhesive, and stirring to prepare the graphene coating, wherein the auxiliary agent is a film-forming auxiliary agent, an adhesion promoter, a base material wetting agent, an antifreezing agent and an anti-mildew agent; the adhesive is water-based epoxy resin, water-based acrylic resin and water-based polyurethane;
preparing a heat insulation layer: adding 12 parts of waterborne fluorocarbon resin into 12 parts of silicone-acrylic resin, stirring and mixing, adding 12 parts of expanded and vitrified micro bubbles, mixing, adding 22 parts of mixed resin, stirring and mixing, and blow-molding to form the heat-insulating layer 3, wherein the mixed resin comprises conductive epoxy resin and acrylic resin, and the ratio of the conductive epoxy resin to the acrylic resin is 1: 2;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
Example 6
Preparing the coating: adding 40 parts of water-based fluorocarbon resin into 150 parts of deionized water, stirring and mixing, then adding 60 parts of graphene, 10 parts of dinonyl calcium naphthalene sulfonate and 20 parts of an auxiliary agent, mixing and dispersing, then adding 20 parts of an adhesive, and stirring to obtain the graphene coating, wherein the auxiliary agent is a defoaming agent, a film-forming auxiliary agent, an adhesion promoter, a substrate wetting agent and an antifreezing agent; the adhesive is water-based epoxy resin, water-based acrylic resin and water-based polyurethane;
preparing a heat insulation layer: adding 15 parts of waterborne fluorocarbon resin into 15 parts of silicone-acrylic resin, stirring and mixing, adding 15 parts of expanded and vitrified micro bubbles, mixing, adding 30 parts of mixed resin, stirring and mixing, and blow-molding to form the heat-insulating layer 3, wherein the mixed resin comprises conductive epoxy resin and acrylic resin, and the ratio of the conductive epoxy resin to the acrylic resin is 1: 2;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
Example 7
Preparing the coating: adding 40 parts of water-based fluorocarbon resin into 150 parts of deionized water, stirring and mixing, then adding 60 parts of graphene, 10 parts of dinonyl calcium naphthalene sulfonate and 20 parts of an auxiliary agent, mixing and dispersing, then adding 20 parts of an adhesive, and stirring to prepare the graphene coating, wherein the auxiliary agent is a defoaming agent, a film-forming auxiliary agent, an adhesion promoter, a base material wetting agent, an antifreezing agent and an anti-mildew agent; the adhesive is water-based epoxy resin and water-based acrylic resin;
preparing a heat insulation layer: adding 15 parts of waterborne fluorocarbon resin into 15 parts of silicone-acrylic resin, stirring and mixing, adding 15 parts of expanded and vitrified micro bubbles, mixing, adding 30 parts of mixed resin, stirring and mixing, and blow-molding to form the heat-insulating layer 3, wherein the mixed resin comprises conductive epoxy resin and acrylic resin, and the ratio of the conductive epoxy resin to the acrylic resin is 1: 2;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
Example 8
Preparing the coating: adding 40 parts of water-based fluorocarbon resin into 150 parts of deionized water, stirring and mixing, then adding 60 parts of graphene, 10 parts of dinonyl calcium naphthalene sulfonate and 20 parts of an auxiliary agent, mixing and dispersing, then adding 20 parts of an adhesive, and stirring to obtain the graphene coating, wherein the auxiliary agent is a defoaming agent, a leveling agent, a film-forming auxiliary agent, an adhesion promoter, a substrate wetting agent, an antifreezing agent and a mildew inhibitor; the adhesive is water-based epoxy resin, water-based acrylic resin and water-based polyurethane;
preparing a heat insulation layer: adding 15 parts of waterborne fluorocarbon resin into 15 parts of silicone-acrylic resin, stirring and mixing, adding 15 parts of expanded and vitrified micro bubbles, mixing, adding 30 parts of mixed resin, stirring and mixing, and blow-molding to form the heat-insulating layer 3, wherein the mixed resin comprises conductive epoxy resin and acrylic resin, and the ratio of the conductive epoxy resin to the acrylic resin is 1: 2;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer 2;
and (3) preparing a finished product: and (3) sequentially connecting the upper protection layer 1, the graphene electric heating layer 2, the heat insulation layer 3 and the lower protection layer 4 to obtain a finished product.
In summary, according to the graphene electrothermal film and the preparation method thereof provided by the present invention, because the graphene electrothermal film comprises an upper protection layer 1, a graphene electrothermal layer 2, a thermal insulation layer 3 and a lower protection layer 4 which are sequentially arranged from top to bottom, the graphene electrothermal layer 2 comprises a base layer and a graphene coating, the graphene coating is located between the base layer and the upper protection layer 1, when in use, heat can be conducted out through the graphene coating, the thermal insulation layer 3 is used to store and reflect the heat dissipated to the lower side of the graphene electrothermal film, so that the heat is uniformly dissipated to the upper side of the graphene electrothermal film, so as to improve unidirectional heat dissipation, and meanwhile, because the base layer is provided with a plurality of grooves 22 at one side close to the upper protection layer 1, and the upper protection layer 1 is provided with bumps 11 matched with the grooves 22 at one side close to the base layer, when in use, the upper protection layer 1 and the graphene electrothermal layer 2 can be combined more tightly, the groove 22 and the bump 11 can also increase the heat dissipation area of the graphene electrothermal layer 2, so that the use effect is enhanced, the upper protection layer 1 and the lower protection layer 4 can play a role of insulation protection, the service life is prolonged, the structure is simple, and the use is easy; respectively preparing the graphene coating and the heat-insulating layer 3 through the coating preparation step and the heat-insulating layer preparation step, coating the graphene coating on the surface of a base layer through the graphene electric heating layer preparation step, drying to prepare the graphene electric heating layer 2, and sequentially connecting the upper protective layer 1, the graphene electric heating layer 2, the heat-insulating layer 3 and the lower protective layer 4 through the finished product preparation step to prepare a finished product; the preparation method has the advantages of simple preparation steps, cost saving, convenient production and easy use.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. 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.

Claims (10)

1. The utility model provides a graphite alkene electric heat membrane, its characterized in that, it includes upper protective layer, graphite alkene electric heat layer, heat preservation and the lower protective layer that sets gradually by last to lower, graphite alkene electric heat layer includes basic unit and graphite alkene coating, graphite alkene coating is located the basic unit with between the upper protective layer, the basic unit is close to one side of upper protective layer is equipped with a plurality of recesses, the upper protective layer is close to one side of basic unit be equipped with recess complex lug.
2. The graphene electrothermal film according to claim 1, wherein the graphene coating comprises the following raw materials: graphene, aqueous fluorocarbon resin, calcium dinonylnaphthalenesulfonate, deionized water, an auxiliary agent and an adhesive.
3. The graphene electrothermal film according to claim 2, wherein the graphene coating comprises the following raw materials in parts by weight: 50-80 parts of graphene, 35-50 parts of waterborne fluorocarbon resin, 5-15 parts of calcium dinonylnaphthalenesulfonate, 100 parts of deionized water, 10-30 parts of an auxiliary agent and 10-30 parts of a binder.
4. The graphene electrothermal film according to claim 2, wherein the auxiliary agent is one or more of a defoaming agent, a leveling agent, a film forming auxiliary agent, an adhesion promoter, a substrate wetting agent, an antifreezing agent and a mildew preventive.
5. The graphene electrothermal film according to claim 2, wherein the adhesive is one or more of water-based epoxy resin, water-based acrylic resin and water-based polyurethane.
6. The graphene electrothermal film according to claim 1, wherein the insulating layer is made of the following raw materials: silicone-acrylic resin, aqueous fluorocarbon resin, mixed resin and expanded and vitrified micro bubbles.
7. The graphene electrothermal film according to claim 6, wherein the heat-insulating layer is prepared from the following raw materials in parts by weight: 10-15 parts of silicone-acrylic resin, 10-15 parts of waterborne fluorocarbon resin, 20-30 parts of mixed resin and 5-15 parts of expanded and vitrified micro-beads.
8. The graphene electrothermal film according to claim 1, wherein the upper protective layer and the lower protective layer are both PET resin films.
9. A method for preparing the graphene electrothermal film of any one of claims 1 to 8, comprising the following steps:
preparing the coating: adding deionized water into the aqueous fluorocarbon resin, stirring and mixing, then adding graphene, calcium dinonylnaphthalenesulfonate and an auxiliary agent, mixing and dispersing, then adding an adhesive, and stirring to obtain the graphene coating;
preparing a heat insulation layer: adding water-based fluorocarbon resin into the silicone-acrylic resin, stirring and mixing, adding the expanded and vitrified micro bubbles, mixing, adding the mixed resin, stirring and mixing, and blow-molding to form a heat-insulating layer;
preparing a graphene electric heating layer: coating the graphene coating on the surface of the base layer, and drying to form a graphene electric heating layer;
and (3) preparing a finished product: and sequentially connecting the upper protective layer, the graphene electric heating layer, the heat insulation layer and the lower protective layer to obtain a finished product.
10. The method of claim 9, wherein in the step of preparing the finished product, the upper protection layer, the graphene electrothermal layer, the insulating layer and the lower protection layer are sequentially bonded by high temperature resistant glue to obtain the finished product.
CN202010872162.XA 2020-08-26 2020-08-26 Graphene electrothermal film and preparation method thereof Pending CN111959081A (en)

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