CN112011268A - Far infrared nano carbon material electric heating coating - Google Patents
Far infrared nano carbon material electric heating coating Download PDFInfo
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- CN112011268A CN112011268A CN201910463639.6A CN201910463639A CN112011268A CN 112011268 A CN112011268 A CN 112011268A CN 201910463639 A CN201910463639 A CN 201910463639A CN 112011268 A CN112011268 A CN 112011268A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/145—Carbon only, e.g. carbon black, graphite
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Resistance Heating (AREA)
Abstract
The invention relates to the technical field of electric heating coatings, in particular to a far infrared nano carbon material electric heating coating which comprises the following components in parts by weight: 20-60 parts of far infrared electrothermal powder, 1-5 parts of stabilizer powder and 40-80 parts of binder; the far infrared electric heating powder comprises the following components in parts by weight: 25-70% of graphite carbon powder, 10-65% of conductive carbon black and 1-5% of nano carbon powder; the coating has better far infrared effect and electric heating performance, can contribute to energy conservation, and has convenient manufacture, stable performance and wide application range.
Description
Technical Field
The invention relates to the technical field of electric heating coatings, in particular to a far infrared nano carbon material electric heating coating.
Background
Far infrared is the abbreviation for remote infrared, and a segment of the spectrum with a wavelength from 0.76 to 400 microns is called infrared light, also known as infrared light. The infrared wavelength range is divided according to the atmospheric wave band: 8-14 microns; according to the infrared spectrum division, the far infrared wavelength range is as follows: 40-1000 microns; in medicine, the far infrared wavelength range is: 30-1000 microns, in general: the infrared rays having a wavelength of 5.6 to 1000 μm are called far infrared rays. Far infrared rays have optical properties such as direct radiation, zigzag, reflection and the like and have strong deep penetration force, and the basic characteristic that any substance absorption causes thermal reaction.
The biological effect of far infrared rays is mainly expressed in the following aspects: 1. in terms of genes, it can be corrected to keep it healthy, for example, wild animals are usually recovered by the sun when they are ill, and if a person lives in a dark cave for a month, their body is deformed and ill. 2. In the aspect of blood vessels, the resonance generates heat, expands with heat and contracts with cold, expands blood vessels with blood circulation quickens the blood vessels to be smooth, the microcirculation is the second heart of a human body and is the source of hundreds of diseases, the pain in traditional Chinese medicine is not smooth, the pain is not smooth, and the traditional Chinese medicine is all the best. 4. In the aspect of nerves, human nerves comprise central nerves and autonomic nerves, the central nerves innervate the language of our limbs, the autonomic nerves innervate the organs and endocrine of our viscera, and the continuous stimulation of vibration can ensure that the nerves are unobstructed so as to effectively control the language and endocrine of our limbs. 5. In terms of fiber, far infrared fiber can emit far infrared rays of 8-15 μm, which is called life ray, and the main effect in medicine is heat action. When the far infrared garment is worn, the far infrared garment has the effects of relieving pain, activating cell tissues, promoting blood circulation, promoting microcirculation of human blood, promoting metabolism, enhancing immunity, deodorizing, drying, dehumidifying, inhibiting bacteria and the like.
The far infrared ray has the following main effects in the aspect of electric heating: 1. the heat generated by the electric heating material can be reflected to the corresponding part in a concentrated manner through reflection, so that the heat generated by the electric heating material is more concentrated, and the energy-saving correlation is achieved. 2. According to the characteristic that any substance of far infrared rays can cause thermal reaction after being absorbed, after the material (paint) generating the far infrared rays is added on the surface of the electric heating material, the electric-heat conversion efficiency of the electric heating material can be greatly improved, thereby achieving the effect of saving energy. 3. According to the characteristic that any substance of far infrared rays can cause thermal reaction after being absorbed, the electric heating material can cause thermal reaction after being absorbed by other human bodies through the generated far infrared rays, so that the human bodies can feel warm. We show through many experiments that: when the temperature of the room reaches 16 ℃, people feel cold in the room heated by the electric heating wire, and when the room is heated by the heat generated by the far infrared material, people feel warm (the result is that the far infrared ray is absorbed by the human body to cause thermal reaction).
Far infrared rays have many excellent characteristics in the aspects of biological and electric heating, so far infrared materials are made into a plurality of health care products, and are also widely applied to electric heating materials, such as far infrared carbon fiber electric heating materials, far infrared coatings coated on the surfaces of the electric heating materials and the like.
After the nano material, especially the nano carbon material is added with the electric heating material, the electric heating conversion rate of the electric heating material can be greatly improved, and according to the detection: the electrothermal conversion rate can reach more than 99 percent, the electrothermal material has good far infrared effect, and the far infrared phase emissivity of the electrothermal material reaches more than 87 percent, so that the far infrared coating for the electrothermal material prepared by adopting the nano carbon material becomes a new development direction of the far infrared coating for the electrothermal material. For example, patent No. CN201510896013.6 discloses a high temperature resistant far infrared conductive heating energy-saving material, which comprises the following components by weight percent: 20-70% of high-temperature resistant conductive adhesive, 8-60% of carbon composite conductive powder, 5-15% of hollow microspheres, 3-10% of aluminum hydroxide micro powder, 1-5% of zinc oxide micro powder, 1-3% of chlorinated paraffin and 1-3% of composite auxiliary agent. The invention relates to a high-temperature resistant far infrared conductive heating energy-saving material which is a novel material prepared by mixing, dispersing, reacting, grinding and filtering additive materials, flame-retardant materials, conductive materials, modified materials, auxiliary agent materials and high-temperature resistant conductive adhesives, and is a renewal product of conductive ink and conductive paint. Overcomes the defects of high temperature resistance, power density, environmental protection and the like of the traditional conductive ink and conductive paint, and provides a novel heating material with better high temperature resistance, higher power density and better environmental protection. The two materials are both electric heating materials and are main bodies of electric heating, and the product of the invention is a coating which is coated on the electric heating materials, and aims to improve the far infrared effect of the electric heating materials, improve the thermal efficiency of the electric heating materials and further achieve the effect of energy saving.
Disclosure of Invention
The invention provides a far infrared nano carbon material electric heating coating and a preparation method thereof for solving the technical problems.
The method is realized by the following technical scheme:
a far infrared nano carbon material electric heating coating comprises the following components in parts by weight: 20-60 parts of far infrared electrothermal powder, 1-5 parts of stabilizer powder and 40-80 parts of binder; the far infrared electric heating powder comprises the following components in parts by weight: 25-70% of graphite carbon powder, 10-65% of conductive carbon black and 1-5% of nano carbon powder.
The stabilizer consists of aluminum oxide, silicon dioxide and titanium dioxide.
The binder is high-temperature silica gel or high-temperature phenolic resin.
The service temperature of the high-temperature silica gel is less than or equal to 400 ℃.
The service temperature of the high-temperature phenolic resin is less than or equal to 1100 ℃.
Meanwhile, the invention provides a preparation method of the far infrared nano carbon material electric heating coating, which comprises the following steps:
(1) diluting the binder: adding a diluent into the binder according to the addition amount of the far infrared electric heating powder, and uniformly mixing to obtain a binder diluent;
(2) primary dispersion: adding far infrared electrothermal powder and a stabilizer into the binder diluent for full dispersion to obtain slurry;
(3) rolling or sanding: conveying the slurry to a three-roller machine for rolling or a sand mill for sanding; when a three-roller machine is adopted for working, continuously rolling for 3-5 times; when the sand mill is adopted for working, sanding is carried out for 0.5-4 h;
(4) and (3) secondary dispersion: and conveying the rolled or sanded slurry to a dispersion machine, redispersing for 0.5-1h, and adding a diluent to adjust the viscosity of the slurry for 50-55s during dispersion.
The diluent is xylene.
The primary dispersion is sequentially added according to the sequence of graphite carbon powder, conductive carbon black and nano carbon powder.
Further, the first dispersion is to add graphite carbon powder for uniform dispersion, then add conductive carbon black for dispersion for 0.5-1h, and finally add nano carbon powder for dispersion for 0.5-1 h.
The far infrared nano carbon material electric heating coating can be used for electric heaters.
The invention also provides a method for applying the far infrared nano carbon material electric heating coating to an electric heater, which comprises the following steps: uniformly coating the coating on the surface of the electric heater by adopting a spraying means, then placing the electric heater in an oven with the temperature of 38-43 ℃ for heat preservation treatment for 0.8-1.2h, then adjusting the temperature of the oven to 98-102 ℃, carrying out heat preservation treatment for 1.8-2.2h, and finally cooling to room temperature.
Has the advantages that:
the coating has better far infrared effect and electric heating performance, can contribute to energy conservation, and has convenient manufacture, stable performance and wide application range.
1. After the coating is coated on the metal electric heating material, the normal phase emissivity of the heating surface of the coating reaches more than 85 percent, and the heating effect of the metal electric heating material is not influenced; on the other hand, due to the characteristic that any substance of far infrared rays can cause thermal reaction after being absorbed, a reaction layer can be generated on the surface of a human body after the human body reacts to the far infrared wavelength, the thermal induction of the human body can be increased by the reaction layer, and the comfort of the human body is greatly increased;
2. the maximum using temperature of the electrothermal coating can reach 1100 ℃, which is the highest in far infrared coatings, and the using temperature of the medium-temperature far infrared coating is below 400 ℃, so that the electrothermal coating can be used for conventional medium-temperature heating elements;
3. the electrothermal coating can be used on the surfaces of electric heating materials such as metal, carbon fiber and the like, and has wider application range;
4. the process for preparing the electric heating coating is simple and easy to industrialize; the application process of the product is simple.
5. The electric heating coating prepared by the invention has stable components, does not generate phenomena such as precipitation, segregation and the like, and can be used after being dispersed for 1 hour after a diluent is added if the viscosity is required to be adjusted during use.
6. The electric heating coating prepared by the invention has stable performance, and after the product is uniformly coated, the difference of measured normal far infrared values at all positions is less than 10%.
Detailed Description
The following is a detailed description of the embodiments of the present invention, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments are included in the scope of the present invention as claimed in the claims.
Example 1
A far infrared nano carbon material electric heating coating comprises the following components in parts by weight: 20 parts of far infrared electrothermal powder, 1 part of stabilizer powder and 40 parts of binder; the far infrared electric heating powder comprises the following components in parts by weight: 70% of graphite carbon powder, 29% of conductive carbon black and 1% of nano carbon powder;
the stabilizer is composed of aluminum oxide, silicon dioxide and titanium dioxide according to the mass ratio of 1:1: 1.
The binder is high-temperature silica gel.
The service temperature of the high-temperature silica gel is less than or equal to 400 ℃.
Example 2
A far infrared nano carbon material electric heating coating comprises the following components in parts by weight: 55 parts of far infrared electrothermal powder, 5 parts of stabilizer powder and 40 parts of binder; the far infrared electric heating powder comprises the following components in parts by weight: 30% of graphite carbon powder, 65% of conductive carbon black and 5% of nano carbon powder;
the stabilizer is composed of aluminum oxide, silicon dioxide and titanium dioxide according to the mass ratio of 1:1: 2.
The binder is high-temperature phenolic resin.
The service temperature of the high-temperature phenolic resin is less than or equal to 1100 ℃.
Example 3
A far infrared nano carbon material electric heating coating comprises the following components in parts by weight: 40 parts of far infrared electrothermal powder, 3 parts of stabilizer powder and 60 parts of binder; the far infrared electric heating powder comprises the following components in parts by weight: 50% of graphite carbon powder, 47% of conductive carbon black and 3% of nano carbon powder;
the stabilizer is composed of aluminum oxide, silicon dioxide and titanium dioxide according to the mass ratio of 1:2: 1.
The binder is high-temperature silica gel.
The service temperature of the high-temperature silica gel is less than or equal to 400 ℃.
Example 4
A far infrared nano carbon material electric heating coating comprises the following components in parts by weight: 40 parts of far infrared electrothermal powder, 3 parts of stabilizer powder and 60 parts of binder; the far infrared electric heating powder comprises the following components in parts by weight: 40% of graphite carbon powder, 56% of conductive carbon black and 4% of nano carbon powder;
the stabilizer is composed of aluminum oxide, silicon dioxide and titanium dioxide according to the mass ratio of 2:1: 1.
The binder is high-temperature phenolic resin.
The service temperature of the high-temperature phenolic resin is less than or equal to 1100 ℃.
Example 5
Embodiments 5 to 8 provide a method for preparing the far infrared nano carbon material electrothermal coating based on the formulations of embodiments 1 to 4, respectively, comprising the following steps:
(1) diluting the binder: adding a diluent into the binder according to the addition amount of the far infrared electric heating powder, and uniformly mixing to obtain a binder diluent;
(2) primary dispersion: firstly adding graphite carbon powder and a stabilizer into a binder diluent, uniformly dispersing, then adding conductive carbon black, dispersing for 1h, and finally adding nano carbon powder, and dispersing for 1h to obtain slurry;
(3) rolling or sanding: conveying the slurry to a three-roller machine for rolling or a sand mill for sanding; when a three-roller machine is adopted for working, rolling is continuously carried out for 5 times; when a sand mill is adopted for working, sanding is carried out for 4 hours;
(4) and (3) secondary dispersion: conveying the rolled or sanded slurry to a dispersion machine, redispersing for 1h, and adding a diluent to adjust the viscosity of the slurry to 50-55s during dispersion;
the diluent is xylene.
Examples 9 to 12
Embodiments 9 to 12 provide methods for preparing the far infrared nano carbon material electrothermal coating based on the formulations of embodiments 1 to 4, respectively, comprising the steps of:
(1) diluting the binder: adding a diluent into the binder according to the addition amount of the far infrared electric heating powder, and uniformly mixing to obtain a binder diluent;
(2) primary dispersion: adding graphite carbon powder into the binder diluent, uniformly dispersing, then adding conductive carbon black and a stabilizer, dispersing for 0.5h, and finally adding nano carbon powder, and dispersing for 0.5h to obtain slurry;
(3) rolling or sanding: conveying the slurry to a three-roller machine for rolling or a sand mill for sanding; when a three-roller machine is adopted for working, rolling is continuously carried out for 3 times; when a sand mill is adopted for working, sanding is carried out for 0.5 h;
(4) and (3) secondary dispersion: conveying the rolled or sanded slurry to a dispersion machine, redispersing for 0.5h, and adding a diluent to adjust the viscosity of the slurry to 50-55s during dispersion;
the diluent is xylene.
Example 13
The embodiment provides a method for applying the far infrared nano carbon material electrothermal coating to an electric heater, which specifically comprises the following steps: the coating is uniformly coated on the surface of the electric heater by adopting a spraying means, then the electric heater is placed in an oven with the temperature of 40 ℃ for heat preservation treatment for 1 hour, then the temperature of the oven is adjusted to 100 ℃, the heat preservation treatment is carried out for 2 hours, and finally the electric heater is cooled to the room temperature.
The test shows that: compared with the uncoated state, the coated product can save energy by 5 to 15 percent, and the comfort of human body is increased.
Comparative example 1
The difference from example 3 is that: the far infrared electric heating powder comprises the following components in parts by weight: 50% of graphite carbon powder and 50% of conductive carbon black;
comparative example 2
The difference from example 3 is that: the stabilizer consists of aluminum oxide and silicon dioxide according to the mass ratio of 1: 1.
Comparative example 3
The difference from example 7 is that: the primary dispersion is to add conductive carbon black and a stabilizer into a binder diluent for uniform dispersion, then add graphite carbon powder for dispersion for 1 hour, and finally add nano carbon powder for dispersion for 1 hour to obtain slurry.
Comparative example 4
The difference from example 7 is that: the primary dispersion is to add nano carbon powder into the binder diluent for uniform dispersion, then add the graphite carbon powder and the stabilizer for dispersion for 1 hour, and finally add the conductive carbon black for dispersion for 1 hour to obtain the slurry.
Test example 1 measurement of far-infrared Effect
The coatings of the examples 3, 7 and comparative examples were coated on a pure cotton cloth to prepare an electric heating cloth, and the emissivity of far infrared radiation at 100 ℃ by using a Fourier infrared spectrometer was shown in Table 1;
meanwhile, uncoated pure cotton cloth is taken as a control group 1, pure cotton cloth only coated with graphite carbon powder is taken as a control group 2, pure cotton cloth only coated with conductive carbon black is taken as a control group 3, and pure cotton cloth only coated with nano carbon powder is taken as a control group 4;
TABLE 1
Thus, it can be seen that: the far infrared effect of the pure cotton cloth is not greatly influenced by only coating the graphite carbon powder, the conductive carbon black and the nano carbon powder, the influence of the embodiment is more obvious, and then the comparative example is carried out.
Test example 2
Electrical property (resistivity) test:
the coatings of examples 3 and 7 and comparative examples were coated on a pure cotton cloth to prepare an electric heating cloth, and the resistance values thereof were measured at two points fixed on the pure cotton cloth, and the test results are shown in table 2;
meanwhile, uncoated pure cotton cloth is taken as a control group 1, pure cotton cloth only coated with graphite carbon powder is taken as a control group 2, pure cotton cloth only coated with conductive carbon black is taken as a control group 3, and pure cotton cloth only coated with nano carbon powder is taken as a control group 4;
TABLE 2
Application example 1
The coatings of examples 3, 7 and comparative examples were used on an electric heater, the coating temperature was measured and recorded with a hand-held thermal infrared imager, and the results are shown in the following table:
TABLE 330V coating temperature and coating State phenomena
| Example 3 | Example 7 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Temperature/. degree.C | 80 | 75 | 127 | 32 | ＞300 |
| State phenomenon | Fever is normal | Fever is normal | The heat is quickly generated | Slight fever | Severe skin burst |
TABLE 420V coating temperature and coating State phenomena
| Example 3 | Example 7 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Temperature/. degree.C | 65 | 63 | 114 | 29 | ＞300 |
| State phenomenon | Fever is normal | Fever is normal | The heat is quickly generated | Slight fever | Severe skin burst |
TABLE 410V coating temperature and coating State phenomena
| Example 3 | Example 7 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Temperature/. degree.C | 64 | 62 | 86 | 30 | ＞300 |
| State phenomenon | Fever is normal | Fever is normal | The heat is quickly generated | Slight fever | Severe skin burst |
Claims (10)
1. A far infrared nano carbon material electric heating coating is characterized by comprising the following components in parts by weight: 20-60 parts of far infrared electrothermal powder, 1-5 parts of stabilizer powder and 40-80 parts of binder; the far infrared electric heating powder comprises the following components in parts by weight: 25-70% of graphite carbon powder, 10-65% of conductive carbon black and 1-5% of nano carbon powder.
2. The far infrared nano carbon material electrothermal coating of claim 1, wherein the stabilizer is composed of alumina, silica, and titanium dioxide.
3. The far infrared nano carbon material electrothermal coating of claim 1, wherein the binder is high temperature silica gel or high temperature phenolic resin.
4. The far infrared nano carbon material electrothermal coating of claim 3, wherein the use temperature of the high temperature silica gel is not more than 400 ℃.
5. The far infrared nano carbon material electrothermal coating according to claim 3, wherein the use temperature of the high temperature phenolic resin is not more than 1100 ℃.
6. The far infrared nano carbon material electrothermal coating of claim 1, wherein the preparation method of the far infrared nano carbon material electrothermal coating comprises the following steps:
(1) diluting the binder: adding a diluent into the binder according to the addition amount of the far infrared electric heating powder, and uniformly mixing to obtain a binder diluent;
(2) primary dispersion: adding far infrared electrothermal powder and a stabilizer into the binder diluent for full dispersion to obtain slurry;
(3) rolling or sanding: conveying the slurry to a three-roller machine for rolling or a sand mill for sanding; when a three-roller machine is adopted for working, continuously rolling for 3-5 times; when the sand mill is adopted for working, sanding is carried out for 0.5-4 h;
(4) and (3) secondary dispersion: and conveying the rolled or sanded slurry to a dispersion machine, redispersing for 0.5-1h, and adding a diluent to adjust the viscosity of the slurry for 50-55s during dispersion.
7. The far infrared nano carbon material electrothermal paint according to claim 6, wherein the primary dispersion is sequentially added according to the sequence of graphite carbon powder, conductive carbon black and nano carbon powder.
8. The far infrared nano carbon material electrothermal paint according to claim 6 or 7, wherein the first dispersion is to add graphite carbon powder to disperse uniformly, then add conductive carbon black to disperse for 0.5-1h, and finally add nano carbon powder to disperse for 0.5-1 h.
9. The far infrared nano carbon material electrothermal paint according to claim 1 can be used for an electric heater.
10. The use according to claim 9, in particular: uniformly coating the coating on the surface of the electric heater by adopting a spraying means, then placing the electric heater in an oven with the temperature of 38-43 ℃ for heat preservation treatment for 0.8-1.2h, then adjusting the temperature of the oven to 98-102 ℃, carrying out heat preservation treatment for 1.8-2.2h, and finally cooling to room temperature.
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| CN114106654A (en) * | 2021-11-24 | 2022-03-01 | 中昊北方涂料工业研究设计院有限公司 | Infrared low-emissivity coating without metal filler |
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