CN115074021B - Carbon-based electric conduction heat material and preparation method and application thereof - Google Patents

Carbon-based electric conduction heat material and preparation method and application thereof Download PDF

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CN115074021B
CN115074021B CN202210928977.4A CN202210928977A CN115074021B CN 115074021 B CN115074021 B CN 115074021B CN 202210928977 A CN202210928977 A CN 202210928977A CN 115074021 B CN115074021 B CN 115074021B
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carbon
polyphenylene sulfide
heat
sulfide resin
electric conduction
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CN115074021A (en
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胡军
薛静静
渠建英
申彬彬
朱峪成
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Northwest University
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    • 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
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    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
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    • B05D7/54—No clear coat specified
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    • F24D13/00—Electric heating systems
    • F24D13/02—Electric heating systems solely using resistance heating, e.g. underfloor heating
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    • F24—HEATING; RANGES; VENTILATING
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Abstract

The invention relates to the technical field of heat supply coatings and electronic heat dissipation, in particular to a carbon-based electric conduction heat material and a preparation method and application thereof. The carbon-based electric conduction heat material is formed by crosslinking the polyphenylene sulfide resin and the carbon-based material, the materials are all environment-friendly materials, the preparation process is safe and environment-friendly, the surface temperature does not exceed 80 ℃ when the material is used, the scalding problem is effectively avoided, the manufacturing cost is low, the use mode is simple, and the problems that the preparation process of a heat supply device is complex, the purchase price is too high, potential safety hazards exist in the use process and the like are solved; meanwhile, the independent use of each household and each room can be realized, and the technical problem that the user cannot flexibly control the household and each room is solved.

Description

Carbon-based electric conduction heat material and preparation method and application thereof
Technical Field
The invention relates to the technical field of heat supply coatings and electronic heat dissipation, relates to a carbon-based electric conduction heat material, and a preparation method and application thereof, and particularly relates to a preparation method of a polyphenylene sulfide resin-carbon-based electric conduction heat coating.
Background
The rapid development of economy causes the non-renewable energy sources such as coal, petroleum, natural gas and the like to be in more and more shortage, so that the traditional boiler heating mode faces elimination, and at the moment, people urgently need a conductive heating material which is simple to operate, saves energy and is low in price.
At present, centralized boiler heating is generally adopted in the market, although the heating effect and the environmental benefit are not good, the centralized boiler heating is a series device, and the heating time cannot be flexibly controlled by a user; in addition, some houses may not use centralized heating, but use other heating modes such as a gas wall-mounted boiler, an air conditioner or a paved floor heating, and the like, but the gas wall-mounted boiler has the hidden dangers of high noise, high poisoning risk, easy occurrence of fire hazard when water is cut off or water pressure is low, and the like; the use of the air conditioner consumes high electric energy; the electric heat conducting floor tiles have high laying cost and large maintenance difficulty. Therefore, a heating device which is low in price, energy-saving and environment-friendly and realizes flexible control of users is needed.
Disclosure of Invention
Aiming at the defects of the existing heating mode, the invention provides a carbon-based electric conduction heat material and a preparation method and application thereof, the carbon-based electric conduction heat material is formed by crosslinking polyphenylene sulfide resin and a carbon-based material, the materials are all environment-friendly materials, the preparation process is safe and environment-friendly, the surface temperature is not more than 80 ℃ when the material is used, the scald problem is effectively avoided, the manufacturing cost is low, the use mode is simple, and the problems of complex preparation process, high purchase price, potential safety hazard in the use process and the like of a heating device are solved; meanwhile, the independent use of each household and each room can be realized, and the technical problem that the user cannot flexibly control the household and each room is solved.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preparation method of a carbon-based electric conduction heat material comprises the following steps:
(1) Preparing the polyphenylene sulfide resin coating:
spreading polyphenylene sulfide resin on the surface of a matrix, and then heating and preserving heat for 30-60min at 300-350 ℃ to obtain a polyphenylene sulfide resin coating;
(2) Preparing the electric heat conducting filler:
mixing carbon fiber nano particles and graphite nano particles to obtain an electric conduction heat filler;
(3) Preparing a carbon-based electric conduction material:
and (2) mixing and pretreating the polyphenylene sulfide resin powder, the poly-perfluoroethylene propylene resin and the electric heat conduction filler in the step (2) to obtain a precursor material, paving the precursor material on the surface of the polyphenylene sulfide resin coating in the step (1), and heating and preserving heat at 300-350 ℃ for 30-60min to obtain the carbon-based electric heat conduction material.
Preferably, the substrate in the step (1) is a metal substrate, which comprises an iron substrate, a copper substrate and an aluminum substrate.
Preferably, the laying method in the step (1) is an electrostatic spraying method or a coating method;
the specific operating conditions of the electrostatic spraying method in the step (1) are as follows: feeding polyphenylene sulfide resin by using compressed air with the pressure of 0.5-0.8MPaMPa, wherein the electrostatic voltage between a spray gun port and a grounding end is 50-60kV, and the distance between the spray gun port and a sample is 80-120mm;
the specific operating conditions of the coating method are as follows: the specific operating conditions of the coating method are as follows: the polyphenylene sulfide resin is dissolved in absolute ethyl alcohol to form slurry, and then the slurry is uniformly coated on the metal matrix.
Preferably, the resistivity of the carbon fiber nanoparticles in the step (2) is 1.5 × 10 -3 Omega/cm, tensile strength of more than or equal to 4900GPa, particle size of graphite nanoparticles of 180-200 meshes, chemical purity of graphite powder, mass ratio of carbon fiber nanoparticles to graphite nanoparticles of 3-7:1-4.
Preferably, the polyphenylene sulfide resin in the step (1) and the polyphenylene sulfide resin in the step (3) are both high flame retardant polyphenylene sulfide resin powder with a dielectric constant of 4.3, and the components form a complete plane by utilizing the cross-linking effect between the polyphenylene sulfide resin powder; the purity of the poly-perfluoroethylene propylene resin in the step (3) is 100%, and the tensile strength is more than or equal to 25MPa; and the mass ratio of the polyphenylene sulfide resin powder to the poly-perfluoroethylene propylene resin to the electrically conductive heat filler is 63-75:5:20-32.
Preferably, the laying method in the step (3) is an electrostatic spraying method or a coating method;
the mixing pretreatment mode using the electrostatic spraying method is as follows: mixing polyphenylene sulfide resin powder, poly-perfluoroethylene propylene resin powder and electric heat conduction filler, grinding, stirring and mixing, drying, continuously stirring and mixing, and drying to obtain a powder precursor material;
the mixed pretreatment mode using the coating method is as follows: dissolving the poly-perfluoroethylene-propylene resin emulsion in absolute ethyl alcohol to obtain a mixed solution; grinding and drying the polyphenylene sulfide resin powder and the electric conduction heat filler together to obtain a mixture; adding the mixture into the mixed solution and uniformly stirring to obtain a slurry precursor material;
wherein the mass ratio of the poly-perfluoroethylene-propylene emulsion to the absolute ethyl alcohol is 1:4-7, and the purpose of the mixing pretreatment is to prevent the conductive particles from agglomerating on one hand and remove the moisture in the precursor material on the other hand.
Preferably, the specific operating conditions of the electrostatic spraying method in the step (3) are as follows: feeding the powder precursor material by using compressed air with the pressure of 0.5-0.8MPa, wherein the electrostatic voltage between a spray gun port and a grounding end is 50-60kV, and the distance between the spray gun port and a sample is 80-120mm;
the specific operating conditions of the coating method are as follows: uniformly coating a sizing agent precursor material on the polyphenylene sulfide resin coating;
the thickness of the precursor material after heating is 20-50 μm.
The invention also protects the carbon-based electric conduction heat material prepared by the preparation method, the thickness of the carbon-based electric conduction heat material is 0.1-1mm, the resistance is very small at the moment, and the quick heat conduction can be realized.
The invention also protects the application of the carbon-based electric heat conduction material in the preparation of a heat conduction and electric conduction heating device, and the heat conduction and electric conduction heating device comprises:
the carbon-based electric conduction heat conduction material is arranged between the conducting strips side by side, and the conducting strips are electrically connected through a conducting wire;
insulating layers are respectively coated between the conducting strips and on the top and the bottom of the carbon-based electric conduction heat material.
Preferably, the conducting strip comprises a copper sheet, an aluminum sheet and a resistance wire; the insulating material of the insulating layer comprises polyphenylene sulfide resin, ethylene chlorotrifluoroethylene copolymer resin and polytetrafluoroethylene resin.
Compared with the prior art, the invention has the beneficial effects that:
1. the carbon-based electric heat conduction material provided by the invention mainly adopts a mode of combining PPS (polyphenylene sulfide) and a carbon-based material to realize the electric and heat conduction performance of the PPS material, so that heat supply is realized; the manufacturing method is simple, the electric conduction and the heat conduction are good, and the carbon-based electric conduction material is applied to a heating device, so that the safe and convenient heating with low cost can be realized.
2. The preparation method of the carbon-based electric conduction heat material provided by the invention can select a coating method or an electrostatic spraying method, is simple to operate compared with the traditional extrusion method, saves time and labor in the preparation process, and can achieve the same heat conduction effect.
3. The carbon-based electric conduction heat material adopts the electric conduction heat filler which is mainly a mixture of carbon fiber and graphite, the mass percentage of the electric conduction heat filler in the carbon-based electric conduction material is 32%, wherein the weight ratio of the carbon fiber to the graphite is 1.
4. The carbon-based electric heat conduction material is applied to the preparation of a heating device, can be independently used in different rooms of a family, and can supply heat without waiting for collective heating.
5. The carbon-based electric heat conduction material provided by the invention is used in a heating device, under the condition of heat conduction in the same area as that of a mural heating device sold in the market, the resistance of the heat conduction material of the mural heating device is measured to be 83.58 omega, and the resistance of the carbon-based electric heat conduction material is measured to be 4.175 omega, namely, under the same voltage representing theoretical condition, the heat power of the electric heat conduction coating is about 20 times that of the mural heating device.
6. When the carbon-based electric heat conduction material is used in a heating device, compared with a mural heating device with the same heating area in the market, the required time is about 1/3 of that of the mural in the market, so that the energy is saved; and all the used materials are environment-friendly, so that the heat supply can be carried out on users while environmental pollution is not caused.
Drawings
Fig. 1 is a morphology diagram of a carbon-based electrically conductive material prepared in example 1, wherein the left diagram is a Scanning Electron Microscope (SEM) diagram of the carbon-based electrically conductive material, and the right diagram is a physical diagram of the carbon-based electrically conductive material;
FIG. 2 is a thermogravimetric plot of a carbon-based electrically conductive thermal material prepared in example 1 of the present invention;
FIG. 3 is a flow chart of a process for preparing a carbon-based electrically conductive thermal material according to example 1 of the present invention by electrostatic spraying;
FIG. 4 is a schematic representation of an embodiment of the carbon-based electrically conductive material of example 1 of the present invention as an intermediate layer of a heating material;
FIG. 5 is a graph showing the temperature rise time of the carbon-based electrically conductive material according to example 1 of the present invention compared with that of a commercial mural device.
Description of the drawings:
1. a carbon-based electrically conductive material; 2. a conductive sheet; 3. and (4) conducting wires.
Detailed Description
The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. The experimental methods described in the examples of the present invention are all conventional methods unless otherwise specified.
Example 1
A preparation method of a carbon-based electric conduction heat material comprises the following steps:
(1) Preparing the polyphenylene sulfide resin coating:
the tinplate with the specification of 110 x 50mm is selected as a matrix, and then the surface of the tinplate is sanded, so that the roughness is increased, and the adhesion of powder is improved;
selecting high flame retardant polyphenylene sulfide (PPS) resin powder with dielectric constant of 4.3 as a cross-linked substance, wherein the specification is 180 meshes;
the polyphenylene sulfide resin is laid on the surface of a tinplate matrix by adopting an electrostatic spraying method, and then the polyphenylene sulfide resin coating is obtained by heating and heat preservation for 30min at 320 ℃;
the specific operation of the electrostatic spraying method is as follows: feeding a powder precursor material by adopting compressed air with the pressure of 0.6MPa, wherein the electrostatic voltage between a spray gun port and a grounding end is 55kV, and the distance between the spray gun port and a sample is 120mm;
(2) Preparing the electric heat conducting filler:
selecting a resistivity of 1.5X 10 -3 The carbon fiber and graphite powder (analytically pure) with omega/cm and tensile strength of more than or equal to 4900GPa are used as electric conduction heat filler, the specification is 180 meshes, and the carbon fiber nano particles and the graphite nano particles are mixed according to the mass ratio of 3:1, mixing to obtain the electric heat conduction filler;
(3) Preparing a carbon-based electric conduction material:
selecting poly-ethylene propylene (FEP) with the purity of 100% and the tensile strength of more than or equal to 25MPa as a dispersing agent, wherein the specification is 180 meshes;
grinding the polyphenylene sulfide resin powder, the poly-perfluoroethylene propylene resin powder and the electric conduction heat filler obtained in the step (2) in a mortar for 10min respectively, then mixing the powders, and drying the mixture in a constant-temperature drying oven at 60 ℃ for 1h, wherein the mixed powder is stirred for 10 min/time to prevent the conductive particles from agglomerating; then stirring for 1h by using a magnetic stirrer, and uniformly mixing all powder materials to obtain a powder precursor material;
wherein the mass ratio of the polyphenylene sulfide resin powder to the poly-perfluoroethylene propylene resin powder to the electrically conductive heat filler is 70:5:25;
feeding a powder precursor material by using compressed air with the pressure of 0.6MPa in a spray gun, spraying the powder precursor material by using the spray gun with the electrostatic voltage between the spray gun port and the grounding end of 55kV and the distance between the spray gun port and a sample of 120mm, and uniformly spraying the powder on the polyphenylene sulfide resin coating in the step (1);
and (3) putting the obtained sample wafer into a muffle furnace, and calcining for 1h at 320 ℃ to obtain the carbon-based electric conduction thermal material, namely the PPS-carbon-based electric conduction thermal coating.
The size of the PPS-carbon-based electric conduction coating prepared by the steps is 110 x 50mm, the thickness of the carbon-based electric conduction material is 80 mu m, the thickness of the heated precursor material is 45 mu m, and the resistance is 8.375 omega.
Example 2
A preparation method of a carbon-based electric conduction heat material comprises the following steps:
(1) Preparing the polyphenylene sulfide resin coating:
selecting an iron-based matrix with the specification of 110 x 50mm, and then sanding the surface of the iron-based matrix, so that the roughness is increased, and the adhesion of powder is improved;
selecting high flame retardant polyphenylene sulfide (PPS) resin powder with dielectric constant of 4.3 as a cross-linked substance, wherein the specification is 180 meshes;
the polyphenylene sulfide resin is paved on the surface of a tinplate matrix by adopting an electrostatic spraying method, and then the polyphenylene sulfide resin coating is obtained by heating and insulating for 60min at 300 ℃;
the specific operation of the electrostatic spraying method is as follows: feeding a powder precursor material by adopting compressed air with the pressure of 0.5MPa, wherein the electrostatic voltage between a spray gun port and a grounding end is 70kV, and the distance between the spray gun port and a sample is 100mm;
(2) Preparing the electric heat conducting filler:
selecting the resistivity to be 1.5 multiplied by 10 -3 The carbon fiber and graphite powder (analytically pure) with omega/cm and tensile strength of more than or equal to 4900GPa are used as electric conduction heat filler, the specification is 180 meshes, and the carbon fiber nano particles and the graphite nano particles are mixed according to the mass ratio of 2:1, mixing to obtain the electric heat conduction filler;
(3) Preparing a carbon-based electric conduction material:
selecting poly-ethylene propylene (FEP) with the purity of 100% and the tensile strength of more than or equal to 25MPa as a dispersing agent, wherein the specification is 200 meshes;
grinding the polyphenylene sulfide resin powder, the poly-perfluoroethylene propylene resin powder and the electric conduction heat filler obtained in the step (2) in a mortar for 10min respectively, then mixing the powders, and drying the mixture in a constant-temperature drying oven at 60 ℃ for 1h, wherein the mixed powder is stirred for 10 min/time to prevent the conductive particles from agglomerating; then stirring for 1h by using a magnetic stirrer, and uniformly mixing all powder materials to obtain a powder precursor material;
wherein the mass ratio of the polyphenylene sulfide resin powder to the poly-perfluoroethylene propylene resin powder to the electrically conductive heat filler is 63:5:20;
feeding a powder precursor material by using compressed air with the pressure of 0.5MPa in a spray gun, spraying the powder precursor material by using the spray gun with the electrostatic voltage of 60kV between the spray gun opening and the grounding end and the distance between the spray gun opening and the sample of 100mm, and uniformly spraying the powder on the polyphenylene sulfide resin coating in the step (1);
and (3) putting the obtained sample wafer into a muffle furnace, and calcining for 1h at 300 ℃ to obtain the carbon-based electric conduction thermal material, namely the PPS-carbon-based electric conduction thermal coating.
Example 3
A preparation method of a carbon-based electric conduction heat material comprises the following steps:
(1) Preparing the polyphenylene sulfide resin coating:
selecting a copper-based matrix with the specification of 110 × 50mm, and then sanding the surface of the copper-based matrix, so that the roughness is increased, and the adhesion of powder is improved;
selecting high flame retardant polyphenylene sulfide (PPS) resin powder with dielectric constant of 4.3 as a cross-linked substance, wherein the specification is 180 meshes;
the polyphenylene sulfide resin is paved on the surface of a tinplate matrix by adopting an electrostatic spraying method, and then the polyphenylene sulfide resin coating is obtained by heating and insulating for 30min at 350 ℃;
the specific operation of the electrostatic spraying method is as follows: feeding a powder precursor material by using compressed air with the pressure of 0.8MPa, wherein the electrostatic voltage between a spray gun port and a grounding end is 50kV, and the distance between the spray gun port and a sample is 80mm;
(2) Preparing the electric heat conducting filler:
selecting a resistivity of 1.5X 10 -3 The carbon fiber and graphite powder (analytically pure) with omega/cm and tensile strength of more than or equal to 4900GPa are used as electric conduction heat filler, the specification is 180 meshes, and the carbon fiber nano particles and the graphite nano particles are mixed according to the mass ratio of 7:4, mixing to obtain the electric conduction heat filler;
(3) Preparing a carbon-based electric conduction material:
selecting poly-ethylene propylene (FEP) with the purity of 100% and the tensile strength of more than or equal to 25MPa as a dispersing agent, wherein the specification is 200 meshes;
respectively grinding the polyphenylene sulfide resin powder, the poly-perfluoroethylene propylene resin powder and the electric conduction heat filler in the step (2) in a mortar for 10min, then mixing the powders, and drying the mixed powders in a constant-temperature drying oven at 60 ℃ for 1h, wherein the mixed powders are stirred for 10 min/time to prevent the conductive particles from agglomerating; then stirring for 1h by using a magnetic stirrer, and uniformly mixing all powder materials to obtain a powder precursor material;
wherein the mass ratio of the polyphenylene sulfide resin powder to the poly-perfluoroethylene propylene resin powder to the electric heat conduction filler is 75:5:32, a first step of removing the first layer;
feeding a powder precursor material by using compressed air with the pressure of 0.8MPa in a spray gun, spraying the powder precursor material by using the spray gun with the electrostatic voltage between the spray gun port and the grounding end of 50kV and the distance between the spray gun port and a sample of 150mm, and uniformly spraying the powder on the polyphenylene sulfide resin coating in the step (1);
and (3) calcining the obtained sample wafer in a muffle furnace at 350 ℃ for 30min to obtain the carbon-based electric conduction thermal material, namely the PPS-carbon-based electric conduction thermal coating.
Example 4
A preparation method of a carbon-based electric conduction heat material comprises the following steps:
(1) Preparing the polyphenylene sulfide resin coating:
an aluminum-based matrix with the specification of 110 × 50mm is selected, and then the surface of the aluminum-based matrix is frosted, so that the roughness is increased, and the adhesion of powder is improved;
selecting high flame retardant polyphenylene sulfide (PPS) resin powder with dielectric constant of 4.3 as a cross-linked substance, and the specification is 200 meshes;
paving polyphenylene sulfide resin on the surface of a tinplate matrix by adopting a coating method, and then heating and preserving heat for 30min at 350 ℃ to obtain a polyphenylene sulfide resin coating;
the coating method comprises the following specific operations: dissolving polyphenylene sulfide resin in absolute ethyl alcohol to form slurry, and then uniformly coating the slurry on an aluminum-based substrate;
wherein the mass ratio of the polyphenylene sulfide resin to the absolute ethyl alcohol is 3:5;
(2) Preparing the electric heat conducting filler:
selecting a resistivity of 1.5X 10 -3 The carbon fiber and graphite powder (analytically pure) with omega/cm and tensile strength of more than or equal to 4900GPa are used as electric conduction heat filler, the specification is 180 meshes, and the carbon fiber nano particles and the graphite nano particles are mixed according to the mass ratio of 3:4, mixing to obtain the electric conduction heat filler;
(3) Preparing a carbon-based electric conduction material:
selecting poly-ethylene propylene (FEP) with the purity of 100% and the tensile strength of more than or equal to 25MPa as a dispersing agent, wherein the specification is 200 meshes;
dissolving the poly-perfluoroethylene-propylene resin emulsion in absolute ethyl alcohol to obtain a mixed solution; grinding the polyphenylene sulfide resin powder and the electric conduction heat filler together for 20min, and drying for 1h to obtain a mixture; adding the mixture into the mixed solution and uniformly stirring to obtain a slurry precursor material;
wherein the mass ratio of the polyphenylene sulfide resin powder to the poly-perfluoroethylene propylene resin powder to the electric heat conduction filler is 75:5:32, a first step of removing the first layer;
and uniformly coating the slurry precursor material on the polyphenylene sulfide resin coating, and calcining the sample wafer in a muffle furnace at 350 ℃ for 30min to obtain the carbon-based electric conduction thermal material, namely the PPS-carbon-based electric conduction thermal coating.
Comparative example 1
A mural device sold in the market is HX-S800, and the manufacturer is new energy Limited company of Jinanhaoxing.
The carbon-based electric conduction material with excellent heat conduction and electric conduction performance, namely the PPS-carbon-based electric conduction coating, is prepared in the embodiments 1-4 of the invention, and the effects are parallel, and the carbon-based electric conduction material, the conducting sheet, the conducting wire and the insulating layer are taken as an example to be prepared into a heat conduction and electric conduction heating device together, and the heat conduction and electric conduction heating device specifically comprises the following components:
the heat conduction and electricity conduction heating device comprises:
the carbon-based heat conducting device comprises a plurality of carbon-based heat conducting materials 1 and symmetrically arranged conducting strips 2, wherein the carbon-based heat conducting materials 1 are arranged between the conducting strips 2 side by side, and the conducting strips 2 are electrically connected through conducting wires 3; several heat-conducting coatings with a specification of 15 x 960mm and a thickness of 25 μm were produced according to the method steps of example 1, and then they were arranged neatly in a rectangular shape with a heating area of 460 x 960mm as an intermediate layer of a heating apparatus;
insulating layers are respectively coated between the conducting strips 2 and at the top and the bottom of the carbon-based electric conduction material 1, PPS (polyphenylene sulfide) is uniformly sprayed on the upper part and the bottom of the middle layer, and the middle layer is completely covered to achieve the insulating effect;
the whole connecting wire part of the middle layer of the device is shown in figure 4, two sides of the device are composed of conducting sheets with the size of 1 × 10 × 1000mm, and the position of the leading-out wire is connected with a switch, so that the simple mural device with the same style can be obtained.
The results of fig. 1 show that the carbon-based electrically conductive thermal material is connected by the cross-linking effect of PPS, so that a film structure is formed in the microstructure of the carbon-based electrically conductive thermal material, thereby achieving the electrically conductive effect of the carbon-based electrically conductive thermal material.
The results of fig. 2 show that the TG curve of the carbon-based electric thermal conductive material prepared in the present invention is substantially a straight line within the temperature range of 30-200 ℃, i.e., the carbon-based electric thermal conductive material has substantially no weight loss within the temperature range.
Simultaneously connecting the obtained heat supply device and a mural device purchased from the market with the same size with 220V household voltage, and simultaneously measuring the surface temperature of the device by using two temperature testers; as shown in fig. 5, it can be seen from fig. 5 that under the same voltage, time and external temperature conditions, the time required for the mural device of the same size purchased in embodiment 1 of the present invention and the mural device of the same size purchased in the market to reach the highest temperature rise point is 7min and 20min, respectively, i.e. the time required for the mural device of the same size in embodiment 1 of the present invention to reach the same heat supply effect under the same conditions is about 1/3 of that of the mural device in the market, which is more energy-saving.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (7)

1. A preparation method of a carbon-based electric conduction material for a heat conduction and electric conduction heating device is characterized by comprising the following steps:
(1) Preparing the polyphenylene sulfide resin coating:
spreading polyphenylene sulfide resin on the surface of a matrix, and then heating and preserving heat for 30-60min at 300-350 ℃ to obtain a polyphenylene sulfide resin coating;
(2) Preparing the electric heat conducting filler:
mixing carbon fiber nano particles and graphite nano particles to obtain an electric conduction heat filler;
(3) Preparing a carbon-based electric conduction material:
mixing and pretreating polyphenylene sulfide resin powder, polyfluorinated ethylene propylene resin and the electric heat conduction filler in the step (2) to obtain a precursor material, paving the precursor material on the surface of the polyphenylene sulfide resin coating in the step (1), and heating and insulating at 300-350 ℃ for 30-60min to obtain a carbon-based electric heat conduction material;
the resistivity of the carbon fiber nano particles in the step (2) is 1.5 multiplied by 10 -3 Omega/cm, tensile strength of more than or equal to 4900GPa, particle size of the graphite nanoparticles of 180-200 meshes, mass ratio of the carbon fiber nanoparticles to the graphite nanoparticles of 3-7:1-4;
the polyphenylene sulfide resin in the step (1) and the polyphenylene sulfide resin in the step (3) are both high flame retardant polyphenylene sulfide resin powder with the dielectric constant of 4.3; the purity of the fluorinated ethylene propylene copolymer resin in the step (3) is 100%, and the tensile strength is more than or equal to 25MPa; and the mass ratio of the polyphenylene sulfide resin powder to the polyfluorinated ethylene propylene resin to the electric conduction heat filler is 63-75:5:20-32;
the heat conduction and electricity conduction heating device comprises:
the carbon-based heat conducting device comprises a plurality of carbon-based heat conducting materials (1) and symmetrically arranged conducting strips (2), wherein the carbon-based heat conducting materials (1) are arranged between the conducting strips (2) side by side, and the conducting strips (2) are electrically connected through conducting wires (3);
insulating layers are respectively coated between the conducting strips (2) and at the top and the bottom of the carbon-based electric conduction heat material (1).
2. The method for preparing a carbon-based electrically conductive thermal material for a thermal and electrical conductive heating apparatus as claimed in claim 1, wherein the substrate of the step (1) is a metal substrate comprising a ferrous substrate, a copper substrate, and an aluminum substrate.
3. The method for preparing a carbon-based electrically conductive heat material for a thermally and electrically conductive heating apparatus as claimed in claim 1, wherein the spreading method in the step (1) is an electrostatic spraying method or a coating method;
the specific operating conditions of the electrostatic spraying method in the step (1) are as follows: feeding polyphenylene sulfide resin by using compressed air with the pressure of 0.5-0.8MPa, wherein the electrostatic voltage between a spray gun opening and a grounding end is 50-70kV, and the distance between the spray gun opening and a sample is 80-120mm;
the specific operating conditions of the coating method are as follows: the polyphenylene sulfide resin is dissolved in absolute ethyl alcohol to form slurry, and then the slurry is uniformly coated on the metal matrix.
4. The method for preparing a carbon-based electrically conductive heat material for a thermally and electrically conductive heating apparatus as claimed in claim 1, wherein the spreading method in the step (3) is an electrostatic spraying method or a coating method;
the mixing pretreatment mode using the electrostatic spraying method is as follows: mixing polyphenylene sulfide resin powder, polyfluorinated ethylene propylene resin powder and electric conduction heat filler, grinding, stirring and mixing, drying, continuously stirring and mixing, and drying to obtain a powder precursor material;
the mixed pretreatment mode using the coating method is as follows: dissolving the fluorinated ethylene propylene resin emulsion in absolute ethyl alcohol to obtain a mixed solution; grinding and drying the polyphenylene sulfide resin powder and the electric conduction heat filler together to obtain a mixture; adding the mixture into the mixed solution and uniformly stirring to obtain a slurry precursor material;
wherein the mass ratio of the fluorinated ethylene propylene resin emulsion to the absolute ethyl alcohol is 1:4-7.
5. The method for preparing a carbon-based electrically conductive thermal material for a thermal and electrical conductive heating system as claimed in claim 4, wherein the specific operating conditions of the electrostatic spraying process in the step (3) are as follows: feeding a powder precursor material by adopting compressed air with the pressure of 0.5-0.8MPa, wherein the electrostatic voltage between a spray gun port and a grounding end is 50-60kV, and the distance between the spray gun port and a sample is 100-150mm;
the specific operating conditions of the coating method are as follows: uniformly coating a sizing agent precursor material on the polyphenylene sulfide resin coating;
the thickness of the precursor material after heating is 20-50 μm.
6. A carbon-based electrically conductive thermal material prepared by the preparation method as claimed in any one of claims 1 to 5, wherein the thickness of the carbon-based electrically conductive thermal material is 0.1 to 1mm.
7. The method for preparing the carbon-based electric heat conduction material for the heat conduction and conduction heating device according to claim 1, wherein the electric conduction sheet (2) comprises copper sheets, aluminum sheets and resistance wires; the insulating material of the insulating layer comprises polyphenylene sulfide resin, ethylene chlorotrifluoroethylene copolymer resin and polytetrafluoroethylene resin.
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