CN115746702A - Method for producing high-temperature-resistant nano-coating - Google Patents
Method for producing high-temperature-resistant nano-coating Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title description 2
- 239000011248 coating agent Substances 0.000 claims abstract description 49
- 238000000576 coating method Methods 0.000 claims abstract description 49
- 239000000203 mixture Substances 0.000 claims abstract description 47
- 239000000758 substrate Substances 0.000 claims abstract description 31
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- 239000011347 resin Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 24
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 32
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 30
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
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- 239000003273 ketjen black Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
The invention relates to a method for generating a high-temperature-resistant nano coating, which comprises the steps of mixing dry powder containing a high-temperature-resistant nano material, carrying out pretreatment such as stirring, adding the mixture into resin to obtain a mixture, then grinding the mixture to form a high-temperature-resistant mixture, and coating the mixture on the surface of a substrate to generate the high-temperature-resistant nano coating. The invention can generate a corresponding coating by utilizing the preparation of the high-temperature-resistant nano material, and form the high-temperature-resistant low-reflectivity coating on the surface layer of the substrate by utilizing the material, so that the coating can be continuously in a high-temperature state and used in a state of ensuring low reflectivity, the pulverization condition can not occur, the cost is low, the process is simple, the low reflectivity can be quickly obtained, and the coating can adapt to the long-term high-temperature operation environment.
Description
Technical Field
The invention relates to the field of high-temperature material application, in particular to a method for generating a high-temperature-resistant nano coating.
Background
In the prior art, for parts such as laser radars and the like required by laser cutting at high temperature, the surface energy of the parts which need light absorption and extinction besides the long-term operation under the high-temperature environment has lower reflectivity. For example, by low pressure spraying of light absorbing materials, the light reflectivity of the component surface can be significantly reduced, but for the reflectivity requirements of lidar, the light emissivity needs to be further reduced, for example, the light emissivity needs to be reduced below 3%. And, current extinction coating can't keep the property under lasting high temperature, nevertheless to its urgent need coating of laser cutting guarantee low reflectivity need operate under lasting high temperature environment again, just so need not fear high temperature and last effective the coating that the extinction was extinction, can not pulverize, can also guarantee to accord with the low reflectivity demand of laser radar's part. Thus, there is a need to provide a high temperature resistant coating that is low cost, simple in process, and maintains low reflectivity.
Disclosure of Invention
The invention aims to provide a method for generating a high-temperature-resistant nano coating, which solves the technical problem that the existing coating can not adapt to the requirement that the surface of a laser radar is matched with the light reflectivity of the laser radar and can also adapt to the high-temperature operation environment of the laser radar, and further solves the technical problem of providing a high-temperature-resistant nano coating which is simplified in process and can reach the preset low reflectivity and be generated quickly.
The invention achieves the above object through the following technical scheme, and in a first aspect, provides a method for generating a high-temperature-resistant nano coating, which comprises the following steps: mixing the high-temperature-resistant nano material with carbon black, and pretreating to obtain mixed dry powder; adding the mixed dry powder into high-temperature-resistant elastic resin for grinding to form a high-temperature-resistant nano mixture; uniformly coating the high-temperature-resistant nano mixture on the surface of a substrate to obtain a high-temperature-resistant nano coating with a preset thickness; the coating is formed with a three-dimensional multilayer column group structure with high-temperature resistant nano materials inclined, vertical or relatively vertical relative to the surface of the substrate so as to continuously perform multiple reflection and absorption on light emitted into the coating under a high-temperature environment.
Wherein the high temperature resistant nanomaterial comprises carbon nanotubes; and/or, the carbon black comprises ketjen black.
Wherein the length of the carbon nano tube is 3 μm, or between 3 and 13 μm, or 13 μm.
Wherein the carbon nanotube is 5 μm, or between 5 and 10 μm, or 10 μm in length.
Wherein, the high temperature resistant nano material and the carbon black are mixed and pretreated to obtain mixed dry powder, which comprises the following steps: mixing the high-temperature-resistant carbon nano tube with the carbon black, and then continuously stirring for 2 hours or more than 2 hours by combining mechanical stirring with ultrasonic vibration to obtain the fully and uniformly mixed dry powder.
Wherein, adding the mixed dry powder into elastic resin for grinding to form a high-temperature-resistant nano mixture, which comprises: adding a small amount of or a proper amount of water into the mixed dry powder to form high-temperature-resistant nano slurry, and then putting the high-temperature-resistant nano slurry into epoxy modified high-temperature-resistant organic silicon resin for grinding, or adding a small amount of/a proper amount of interfacial activator solution into the mixed dry powder and then putting the mixed dry powder into epoxy modified high-temperature-resistant organic silicon resin for grinding to form a fully-mixed and uniformly-high-temperature-resistant nano mixture.
Wherein, evenly coating the high temperature resistant nano-mixture on the surface of the substrate to obtain the high temperature resistant nano-coating with the preset thickness, comprising: putting the high-temperature-resistant nano mixture into spraying equipment, and uniformly spraying after pressurizing and atomizing; the predetermined thickness is 20 μm, between 20 μm and 45 μm, or 45 μm; and standing and heating after spraying to form the high-temperature-resistant nano coating.
Wherein the predetermined thickness is selected to be 30 μm, or 30 to 40 μm, or 40 μm; spraying the surface of the substrate for one or more times to form a uniform coating; the pressure atomization comprises pressurizing to 3.5kg/cm 2 The high pressure above and forms a highly atomized mixture based on the high pressure and the nozzle of the spraying device.
Wherein, a three-dimensional multi-layer column group structure with high temperature resistant nano materials inclined, vertical or relatively vertical relative to the surface of the substrate is formed in the coating, so as to continuously perform multiple reflection and absorption on light emitted into the coating under a high temperature environment, and the three-dimensional multi-layer column group structure comprises: in the coating obtained by vertical spraying based on the nozzle, the microstructure is a three-dimensional multi-layer staggered column group structure formed by the high-temperature resistant carbon nano tube which is vertical or relatively vertical to the surface of the substrate; the incident light is repeatedly reflected and absorbed based on the cylinder group structure, so that the reflectivity is reduced; the continuous high-temperature environment comprises an environment with the temperature of 450-700 ℃.
Wherein the pressure atomization comprises pressurizing the mixture to 4kg/cm in a spray coating device 2 And vertically and uniformly spraying the high atomized mixture formed based on the spraying equipment and the high pressure onto the surface layer of the substrate through a nozzle of the spraying equipment to form the high temperature resistant nano coating.
Compared with the prior art, the method generates the high-temperature-resistant coating on the parts needing low reflectivity, particularly the parts such as laser radars and the like used in the high-temperature environment, and realizes the purpose of continuously and effectively reducing the light emissivity in the high-temperature environment. Specifically, the high-temperature resistant nano-material is prepared by a mixture of specific high-temperature resistant nano-materials, and then a high-pressure high-atomization spraying mode is adopted, so that the high-temperature resistant materials such as carbon nano-tubes and high-temperature resistant resin in a sprayed surface layer can be ensured not to be pulverized continuously at high temperature, the carbon nano-tubes are sprayed in a coating layer to form a micro-staggered three-dimensional multi-layer columnar or column group structure which is positioned on the surface of a substrate at an inclined, vertical or relatively vertical angle, so that light can be reflected on a column for multiple times to absorb and reduce energy, the reflectivity is ensured to be less than 3% (light with the wavelength of 400-1500 nm), the range of the high-temperature resistant low-light material of the laser radar is met, the glossiness of incident light at an angle of 85 degrees is less than 0.3 and reaches 0.1-0.2.
Drawings
In order to make the technical problems solved by the present invention, the technical means adopted and the technical effects obtained more clear, the following will describe in detail the embodiments of the present invention with reference to the accompanying drawings. It should be noted, however, that the drawings described below are only illustrations of exemplary embodiments of the invention, from which other embodiments can be derived by those skilled in the art without inventive faculty.
FIG. 1 is a schematic flow diagram of a principal method of producing a high temperature-resistant nanocoating.
Detailed Description
Exemplary embodiments of the present invention will now be described more fully. The exemplary embodiments, however, may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.
The term "and/or" and/or "includes any and all combinations of one or more of the associated listed items.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
Example 1
Referring to fig. 1, the main process of generating the high temperature resistant nano-coating in one embodiment of the present invention may obtain a coating with a thickness of 20 μm, between 20 μm and 45 μm, or 45 μm, preferably 30 μm, or 30 to 40 μm, or 40 μm; the high-temperature resistant nano coating comprises materials such as modified high-temperature resistant elastic resin (such as organic silicon resin) and the like, and is mainly oily modified resin (epoxy modified organic silicon resin), so that the oily high-temperature resistant resin can be kept stable at 700 ℃ for a long time, can still keep the properties in a high-temperature cutting environment such as a condition of suddenly rising to 800 ℃, is not pulverized, namely the coating cannot be damaged, and continuously has excellent capability of reducing the reflectivity. Carbon nanotubes wherein the length of the carbon nanotubes is selected to be between 3 μm, or between 3 and 13 μm, or 13 μm,5-10 μm, preferably the length may be between 5 μm, or between 5 and 10 μm, or 10 μm; and the carbon black may be ketjen black. It can adapt to the required of laser radar of operation under the high temperature environment: the light emissivity is reduced and can reach below 3 percent. One embodiment of a method of forming a high temperature resistant coating includes the steps of:
and step S110, mixing the high-temperature-resistant nano material with carbon black, and preprocessing to obtain mixed dry powder.
In one embodiment, the pretreatment means includes, but is not limited to, mechanical agitation, ultrasonic vibration mixing, or a combination thereof, etc., to achieve a substantially uniform mixing. Preferably, the mixing is uniform via mechanical stirring combined with ultrasonic vibration for 2 hours or more.
Furthermore, the high temperature resistant nano material can be selected from carbon nano materials, such as carbon nano tubes, and has high temperature resistance. The length of the carbon nanotubes is selected to be 3 to 13 μm, and preferably may be 5 μm, or between 5 and 10 μm, or 10 μm.
Further, the carbon black includes ketjen black.
Further, the carbon nanotubes in the mixed dry powder are present in a weight ratio of not more than 25%, preferably 15% to 20%.
And step S120, adding the mixed dry powder into the modified high-temperature-resistant elastic resin for grinding to form a high-temperature-resistant nano mixture.
In one embodiment, the mixed dry powder is added into a small amount or a proper amount of aqueous solution, preferably pure water, and stirred uniformly to form a high temperature resistant nano slurry, and then put into a high temperature resistant elastic resin, such as a silicone resin, preferably an epoxy modified silicone resin, and then an organic solvent or a nontoxic oily solvent and the like are added, and grinding is carried out until uniform mixing is achieved. The epoxy resin can not be used at the temperature of more than 250 ℃ generally, the adopted organic silicon resin, particularly the organic silicon resin with the epoxy property, can endure the temperature of more than 250 ℃, for example, can not be pulverized when being continuously at the temperature of 450 ℃ or 700 ℃, and can also completely endure the laser cutting environment at the temperature of 600 ℃ and 800 ℃ in a short time.
In one embodiment, the mixed dry powder may be added with a small amount of surfactant and stirred uniformly to form a high temperature resistant nano oil removal slurry, and then the high temperature resistant nano oil removal slurry is added into the modified elastic resin and the organic solvent for grinding. The degreasing slurry forms a mixture that can more effectively disrupt the interference of a portion of the release agent of the substrate with the adherent coating.
Furthermore, when the high-temperature-resistant nano mixture generates a coating on the surface of metal or plastic, the coating can be effectively attached to the surface with the release agent by adopting an oily solvent; preferably, the surface such as an LED having an extremely thin mesh-like plastic molded by a mold release agent is more effectively adhered after degreasing. Particularly, the mixture of the mixed slurry passing through the interfacial agent can better eliminate the interference of the parting agent attached to the surface of the plastic.
The preferred milling time may be 10 to 30 minutes to form a well-mixed homogeneous refractory nano-mixture.
Further, a mixed dry powder containing a high temperature resistant material such as carbon nanotubes is ground in the modified high temperature resistant elastic resin to form a mixture, wherein the length of the carbon nanotubes is 3 μm, or between 3 and 13 μm, or 13 μm, and preferably the length of the carbon nanotubes is 5 μm, or between 5 and 10 μm, or 10 μm.
Furthermore, a filler or an auxiliary agent can be added into the obtained high-temperature-resistant nano mixture, wherein the total weight ratio of the elastic resin and the high-temperature-resistant nano slurry can reach 46%, and the weight ratio of the high-temperature-resistant nano slurry or the high-temperature-resistant nano oil-removing slurry is preferably not less than 26% and not less than 22%, preferably 25%. For the high temperature resistant nano-blend with degreasing slurry, the interfacial agent therein accounts for 3% of the 25% of the total blend.
And S130, forming a uniform coating on the surface layer of the substrate after pressurizing and atomizing the mixture to obtain a high-temperature-resistant nano surface layer with a preset thickness.
In one embodiment, the high-temperature-resistant nano mixture is placed into a spraying device for pressurized atomization spraying through a spraying mode. Specifically, the pressure was increased to 3.5kg/cm 2 Above, preferably 4kg/cm or more 2 To 4.5kg/cm 2 . Further, the atomization may be based on an atomization effect by a nozzle and pressure of the spray equipment, forming a highly atomized state of the mixture based on high pressure. Based on the mixture composition, the atomization of all carbon nanotubes can be effectively ensured by high pressure, and the high pressure is increased to 3.5kg/cm 2 The tubular molecules of the carbon nano tubes can be dispersed to 4kg/cm 2 Can reach the optimum, ensures that all tubular molecules of the carbon nano tubes mixed by the high-temperature resistant elastic resin are dispersed and sufficiently dispersed, and can form a sufficient atomization state with the molecules of the carbon black with the coloring effect.
Further, a high-pressure high-atomization mode is adopted, the mixture after high-pressure high-atomization is sprayed on the surface of the substrate by using spraying equipment, and a high-temperature-resistant nano coating is generated, so that the carbon nano tubes form a microscopic multi-level columnar group structure or a three-dimensional multi-layer staggered column group in the coating sprayed on the substrate.
Specifically, the atomized high-temperature-resistant nano mixture processed by pressurization and atomization in the spraying equipment is continuously sprayed on the surface of a substrate in a high-pressure and high-atomization state, and is particularly sprayed on a part such as a laser radar and the like, wherein the part requires the reflectivity to be below 3%. The coating produced by maintaining the high-pressure high-atomization state is sprayed on the substrate, and has dispersed and enough carbon nano tubes to form one or more layers of microcosmic cylinder group three-dimensional structures. Further, the carbon nanotubes and carbon black (ketjen black) are the main components of the spray coating in a state of maintaining high pressure and high atomization, and the coating layer thereof is colored darker or blacker.
Among them, a spray coating device such as a paint gun, etc. Further, pressurizing to 4kg/cm or more 2 The high pressure, based on the nozzle diameter and the high pressure of the spraying equipment, the high pressure, high atomization of the mixture is sprayed onto the coating on the surface of the substrate, which can be single or multiple uniform spraying, the nozzle is perpendicular to the substrate, and the selected coating thickness is achieved by one-time spraying or multiple spraying. Preferably multiple times, more uniform overall. The high-temperature resistant nano material such as carbon nano tubes in the generated coating can be inclined, vertical or relatively vertical to form a three-dimensional multilayer structure so as to reflect and absorb light incident on the surface layer of the ink for multiple times and consume energy of the incident light.
Further, the selected or predetermined thickness of the resulting uniform coating is 20 μm, between 20 μm and 45 μm, or 45 μm, preferably 30 μm, or 30 to 40 μm, or 40 μm.
Further, applying pressureTo 3.5kg/cm 2 The above high-pressure further pressure atomizing conditions comprise pressurizing the mixture in the spraying equipment to more than 4kg/cm 2 Is used to assist in the formation of the microstructure. And, a high temperature-resistant nano-coating layer may be formed by uniformly spraying a highly atomized mixture formed based on a spraying apparatus and the high pressure onto a surface of a substrate in a vertical manner. In addition, the high atomization effect achieved by the high pressure in this range can avoid low pressure, i.e., less than 3.5kg/cm 2 Failure to develop an effective spray-on atomization effect (such as the jungle effect described below) and resulting in insufficient jetness of the subsequently applied ink layer; also, high pressures are higher than 4.5kg/cm 2 Also, excessive fogging does not result in effective sprayed fogging and results in insufficient blackness of subsequently applied ink layers.
In one embodiment, the high temperature resistant nano material in the coating layer is inclined, vertical or relatively vertical relative to the surface layer of the substrate to form a three-dimensional multi-layer cylinder/cylinder group structure, so that the multiple reflection absorption of the light emitted into the coating layer comprises the following steps: the microstructure in the coating is a three-dimensional multilayer staggered cylinder group structure formed by the high-temperature-resistant carbon nano tubes in an inclined, vertical or relative vertical mode to the substrate, the reflectivity is reduced by the fact that incident light is large in reflection dispersion under the three-dimensional multilayer staggered cylinder group structure, the energy of the light is continuously consumed, and finally the reflectivity is effectively reduced.
Wherein, after the spraying to form the coating, the coating can be left for a period of time, such as 2 to 5 minutes, preferably 3 minutes, and heated for 5 to 10 minutes, preferably 8 minutes, to form the high temperature resistant light absorbing and extinction coating.
In the high-temperature resistant nano coating, the high-temperature resistant carbon nano tube and the high-temperature resistant elastic resin are adopted, so that the continuous use of the coating in a high-temperature environment is ensured, and the three-dimensional multilayer staggered cylinder/columnar group in the microstructure of the coating is also utilized to reflect and absorb incident light for multiple times in the coating to consume energy and reduce energy level, so that the overall reflectivity is less than 3% (light with the wavelength of 400-1500 nm) and reaches 2.6% or even 2%.
And through measurement, the sprayed material is measured by a glossiness meter, the low-glossiness material meets the low-glossiness material and the spraying effect thereof, the glossiness of incident light basically at an angle of 85 degrees is less than 0.3 and can reach 0.1-0.2, and the light absorption and extinction requirements of a laser radar are met.
The reflectivity and the high temperature resistance of the tested high temperature resistant nano coating are compared with those of the existing coating as follows:
comparative example
A comparative example of the method for forming a high temperature resistant nanocoating was modified from the foregoing example 1 mainly in the selection of the constituent elements and the process of forming the coating.
For example, in the preprocessing of step S110, if the time is less than 2 hours, the degree of uniformity of mixing or density is low.
For example, in step S120, the mixed dry powder containing the carbon nanotubes is added to the elastic resin, ground for less than 10 minutes or more than 30 minutes, and added with the photoinitiator for sufficient mixing to obtain a uniformly mixed high temperature resistant nano mixture. If the grinding time is too short, the obtained mixture cannot meet the expected requirements, the cost is relatively low, the micro morphology formed after subsequent spraying is not uniform compared with that of the embodiment 1, and the reflection effect is relatively weak. If the grinding time is too long, the degree of mixing is high, but the cost and time are increased.
Further, when the length of the carbon nanotube is selected to be 3 to 13 μm, including the interval between 3 μm and 13 μm, specifically between 3 μm and 5 μm or between 10 μm and 13 μm, the structural morphology of the multilayer three-dimensionally staggered pillar group formed in the subsequent spraying is not as good as that formed by 5 to 10 μm, and the shorter length will result in a weaker reflection effect, and the longer length will result in a less-layered structure with less complexity. While the carbon black may still be ketjen black.
For example, step S130, uniformly spraying the mixture on a substrate to be sprayed under a pressurized atomization condition to obtain a high-temperature-resistant nano-coating with a predetermined thickness; the high-temperature-resistant nano material is in a state of inclining, being vertical or being relatively vertical to the surface of the substrate to form a three-dimensional multilayer structure, and can reflect and absorb light emitted into the surface layer of the printing ink for multiple times.
Wherein a single application of a spray device such as a paint gun is less uniform than multiple applications. The pressure may be 5kg/cm or more 2 The mixture is sprayed onto the substrate layer at a high pressure and high atomization based on the nozzle diameter and high pressure of the spraying equipment, the pressure is higher, the atomization is more serious, the cost is higher, the spraying time is prolonged, and the blackness of the sprayed coating is insufficient due to over-atomization.
Further, the coating thickness is sprayed to 20 to 30 μm, or 40 to 45 μm, the former forming relatively weak reflection, less dense and staggered multi-layered pillars, the latter being costly and relatively heavy.
Also, by measurement, the sprayed material is measured by a gloss meter, the low-gloss material and the spraying effect thereof are met, the gloss of incident light basically at an angle of 85 degrees is less than 0.3, 0.1-0.2 can be achieved, the light is basically stabilized at 0.1, and the light absorption and extinction requirements of laser radars are met. In particular, the light-emitting diode can meet the special requirements of high-temperature environments and can effectively reduce the reflectivity.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (10)
1. A method of forming a high temperature resistant nanocoating, comprising the steps of:
mixing the high-temperature-resistant nano material with carbon black, and pretreating to obtain mixed dry powder;
adding the mixed dry powder into high-temperature-resistant elastic resin for grinding to form a high-temperature-resistant nano mixture;
uniformly coating the high-temperature-resistant nano mixture on the surface of a substrate to obtain a high-temperature-resistant nano coating with a preset thickness;
the coating is formed with a three-dimensional multilayer column group structure with high-temperature resistant nano materials inclined, vertical or relatively vertical relative to the surface of the substrate so as to continuously perform multiple reflection and absorption on light emitted into the coating under a high-temperature environment.
2. The method of claim 1,
the high-temperature resistant nano material comprises a carbon nano tube;
and/or the presence of a gas in the atmosphere,
the carbon black includes ketjen black.
3. The method of claim 2, wherein the carbon nanotubes are 3 μ ι η, or between 3 and 13 μ ι η, or 13 μ ι η in length.
4. The method of claim 3, wherein the carbon nanotubes have a length of 5 μm, or between 5 and 10 μm, or 10 μm.
5. The method of claim 1, wherein the mixing of the high temperature resistant nanomaterial with carbon black is pretreated to obtain a mixed dry powder comprising:
mixing the high-temperature-resistant carbon nano tube with the carbon black, and then continuously stirring for 2 hours or more than 2 hours by combining mechanical stirring with ultrasonic vibration to obtain the fully and uniformly mixed dry powder.
6. The method of claim 5, wherein adding the dry blended powder to an elastomeric resin and milling to form a high temperature resistant nano-blend comprises:
adding a small amount of or a proper amount of water into the mixed dry powder to form high-temperature-resistant nano slurry, and then putting the high-temperature-resistant nano slurry into epoxy modified high-temperature-resistant organic silicon resin for grinding, or adding a small amount of/a proper amount of interfacial activator solution into the mixed dry powder and then putting the mixed dry powder into epoxy modified high-temperature-resistant organic silicon resin for grinding to form a fully-mixed and uniformly-high-temperature-resistant nano mixture.
7. The method of claim 1, wherein uniformly coating the refractory nano-mixture on the surface of the substrate to obtain a refractory nano-coating of a predetermined thickness comprises:
putting the high-temperature-resistant nano mixture into spraying equipment, and uniformly spraying after pressurizing and atomizing;
the predetermined thickness is 20 μm, between 20 μm and 45 μm, or 45 μm;
and standing and heating after spraying to form the high-temperature-resistant nano coating.
8. The method of claim 7,
the predetermined thickness is selected to be 30 μm, or 30 to 40 μm, or 40 μm;
spraying the surface of the substrate for one or more times to form a uniform coating;
the pressure atomization comprises pressurizing to 3.5kg/cm 2 The above high pressure and a highly atomized mixture is formed based on the high pressure and the nozzle of the spraying device.
9. The method as claimed in claim 8, wherein the coating layer is formed with a three-dimensional multi-layer pillar group structure with the refractory nano-materials inclined, vertical or relatively vertical to the substrate surface, so as to continuously perform multiple reflection absorption on the light incident to the coating layer in a high-temperature environment, and the method comprises:
in the coating obtained by vertical spraying based on the nozzle, the microstructure is a three-dimensional multi-layer staggered column group structure formed by the high-temperature resistant carbon nano tube which is vertical or relatively vertical to the surface of the substrate;
the incident light is repeatedly reflected and absorbed for multiple times based on the cylinder group structure, so that the reflectivity is reduced;
the continuous high-temperature environment comprises an environment with the temperature of 450-700 ℃.
10. The method of claim 7, 8 or 9,
the pressure atomization comprises pressurizing the mixture to 4kg/cm in a spraying device 2 And vertically and uniformly spraying the high atomized mixture formed based on the spraying equipment and the high pressure onto the surface layer of the substrate through a nozzle of the spraying equipment to form the high temperature resistant nano coating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211617668 | 2022-12-15 | ||
| CN2022116176681 | 2022-12-15 |
Publications (2)
| Publication Number | Publication Date |
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| CN115746702A true CN115746702A (en) | 2023-03-07 |
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| CN116060279A (en) * | 2022-12-15 | 2023-05-05 | 深圳稀光新材料有限公司 | Oil-based ink spraying method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110317439A (en) * | 2019-07-30 | 2019-10-11 | 河北科力汽车装备股份有限公司 | A kind of low reflectivity material, preparation method and with its manufactured hood |
| CN112011232A (en) * | 2020-08-04 | 2020-12-01 | 深圳烯湾科技有限公司 | Carbon nano tube super black paint and preparation method thereof |
| CN113004753A (en) * | 2021-02-01 | 2021-06-22 | 深圳烯湾科技有限公司 | Water-based composite extreme black optical coating and preparation method and use method thereof |
| CN114907730A (en) * | 2022-05-10 | 2022-08-16 | 湖南松井新材料股份有限公司 | Super-black coating and preparation method and application thereof |
| CN115386213A (en) * | 2022-08-29 | 2022-11-25 | 南京聚隆科技股份有限公司 | High light absorption material and preparation method thereof |
-
2022
- 2022-12-22 CN CN202211667100.0A patent/CN115746702B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110317439A (en) * | 2019-07-30 | 2019-10-11 | 河北科力汽车装备股份有限公司 | A kind of low reflectivity material, preparation method and with its manufactured hood |
| CN112011232A (en) * | 2020-08-04 | 2020-12-01 | 深圳烯湾科技有限公司 | Carbon nano tube super black paint and preparation method thereof |
| CN113004753A (en) * | 2021-02-01 | 2021-06-22 | 深圳烯湾科技有限公司 | Water-based composite extreme black optical coating and preparation method and use method thereof |
| CN114907730A (en) * | 2022-05-10 | 2022-08-16 | 湖南松井新材料股份有限公司 | Super-black coating and preparation method and application thereof |
| CN115386213A (en) * | 2022-08-29 | 2022-11-25 | 南京聚隆科技股份有限公司 | High light absorption material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116060279A (en) * | 2022-12-15 | 2023-05-05 | 深圳稀光新材料有限公司 | Oil-based ink spraying method |
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