CN114054318B - Carbon-based micro-nano photo-thermal coating and preparation method thereof - Google Patents
Carbon-based micro-nano photo-thermal coating and preparation method thereof Download PDFInfo
- Publication number
- CN114054318B CN114054318B CN202111334060.3A CN202111334060A CN114054318B CN 114054318 B CN114054318 B CN 114054318B CN 202111334060 A CN202111334060 A CN 202111334060A CN 114054318 B CN114054318 B CN 114054318B
- Authority
- CN
- China
- Prior art keywords
- coating
- carbon
- substrate
- nano
- based micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
-
- 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
- B05D7/14—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 to metal, e.g. car bodies
-
- 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
- B05D7/24—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 for applying particular liquids or other fluent materials
-
- 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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/548—No curing step for the last layer
-
- 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
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a carbon-based micro-nano photo-thermal coating and a preparation method thereof, belonging to the field of solar photo-thermal conversion, wherein the carbon-based micro-nano photo-thermal coating comprises a film-coated substrate, RTV-1 is sequentially coated on the surface of the substrate in a spin mode, and candle ash is deposited; the method is characterized in that: the film-coated substrate takes metal aluminum as an infrared reflecting layer and has the function of reducing the infrared emissivity of the coating; the RTV-1 layer is a deposition layer and has the function of enhancing the binding force of the carbon nano-particle coating; the carbon-based micro-nano layer is a candle ash deposition layer and has the functions of absorbing solar radiation and improving the absorption performance of the surface. The carbon-based micro-nano photothermal coating prepared by the method has high absorptivity and low emissivity, can greatly improve the photothermal conversion efficiency of the flat plate type heat collector, is simple to prepare, and has relatively low actual cost when applied to the method.
Description
Technical Field
The invention belongs to the field of solar photo-thermal conversion, and relates to a carbon-based micro-nano photo-thermal coating and a preparation method thereof.
Background
With the development and progress of human society, energy has become an indispensable resource for people, people develop faster and faster, energy consumption is more and more, and in the face of energy problems, each country supports the development and utilization of new energy, and has corresponding supporting policies in the field of new energy, thereby promoting the rapid development of the whole industry. Solar energy is an inexhaustible clean energy, and researchers are actively converting solar energy utilization theory into application. The high-efficiency solar photo-thermal conversion coating needs to simultaneously meet the two conditions of high sunlight absorption rate and low thermal radiance. The difference of surface materials is certainly related to the efficiency of solar photothermal conversion, and the currently used photothermal conversion materials are: metal plasma materials, carbon-based chemical materials, polymer ppy materials, biocomposites, and semiconductor metal materials. Compared with a metal plasma material, the carbon-based material is lower in cost, more importantly, is easy to obtain, and has a good application prospect in the field of solar photo-thermal absorption. Its rough characteristics are shown in the visible spectrum region, the reflection of the surface is effectively reduced, and the material can show high reflection characteristics in the infrared and long wavelength spectrum regions, so that the material can selectively absorb sunlight in different ranges.
Broadband sunlight can be absorbed for carbon-based materials due to the continuous energy levels of the hybrid bonds, but their absorption is limited by the reflection of about 0.85 at their surface. Therefore, it is desirable to prepare carbon nanostructures that are multi-layered and porous multiple times to increase the optical path length to capture light and multiple internal reflection absorption, thereby reducing reflection energy loss. However, because the bonding force between the carbon nanoparticles and the aluminum substrate is poor, atoms between the particles and the surface have many dangling bonds, have unsaturation, and are easy to be bonded with other atoms to be stabilized, so that the prepared solar photothermal material has poor mechanical properties, optical properties and chemical stability.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a preparation method of a carbon-based micro-nano photo-thermal coating, so as to solve the problem that the solar photo-thermal material prepared by the prior art is poor in mechanical property, optical property and chemical stability.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention discloses a carbon-based micro-nano photo-thermal coating which sequentially consists of a substrate, a binding layer and an absorption layer from bottom to top; the substrate is made of industrial pure aluminum, the bonding layer is RTV-1, and the absorption layer is a carbon nano-particle coating.
The invention also discloses a preparation method of the carbon-based micro-nano photothermal coating, which comprises the following steps,
s1: adopting industrial pure aluminum as a substrate layer material, and carrying out ultrasonic cleaning and drying on the substrate;
s2: spin-coating on a dry substrate, solidifying the finished coating, then ultrasonically cleaning the coating on the substrate, and removing an oxide layer, pollutants and burrs on the surface of RTV-1 to form a bonding layer;
s3: depositing candle ash, controlling the distance between a lamp wick and a substrate to be 2.9cm in the deposition process, and depositing for 2min to form an absorption layer.
Preferably, in S2, a spin coater is used to perform spin coating, and the first spin coating time is adjusted to be 20S, the spin rotation speed is adjusted to be 500rpm, the second spin coating time is adjusted to be 60S, and the spin rotation speed is adjusted to be 800rpm.
Preferably, when RTV-1 is spin-coated, the electromechanical voltage of the spin-coating machine is stabilized to 220V.
Preferably, in S2, the finished coating is left in air for 10min to solidify.
Preferably, the substrate material is industrial pure aluminum with surface smoothness Ra <1 μm, rustless points on the surface and pits.
Preferably, the substrate is cleaned by using ethanol in S1, the flat substrate is completely put into the ethanol before the substrate is cleaned by using the ethanol, the distance between the substrates is kept at least 1cm in the cleaning process, and the heating temperature is kept at 28 ℃; the water level is shown as 80mm, the working power is 100W, and the washing time is 30min.
Preferably, the ethanol is absolute ethanol with the purity of more than 99.7 percent.
Preferably, after S2 is finished, the substrate and the bonding layer are dried in air for 10min and washed in ethanol for 10min.
Preferably, when the absorption layer is deposited in S3, the substrate moves in the same horizontal direction, the moving range covers 4 × 4cm, and after the deposition is completed, the coating is removed and cooled in air.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a carbon-based micro-nano photo-thermal coating, wherein a substrate takes industrial pure aluminum as an infrared reflecting layer, and the infrared reflecting layer has the function of reducing the infrared emissivity of the coating; the RTV-1 layer is a deposition layer, and the RTV-1 can increase the force between carbon particles and between the carbon particles and the surface of the RTV-1; the two layers are firmly combined, the surface energy of the two layers is obviously reduced, and the RTV-1 layer has the function of enhancing the binding force of the carbon nano particle coating; the carbon-based micro-nano layer is a candle ash deposition layer and has the functions of absorbing solar radiation and improving the surface absorption performance. Thereby forming the sunlight photo-thermal material which integrates excellent mechanical property, optical property and chemical stability. The coating disclosed by the invention has a simple structure, has good thermal stability and chemical stability, has good super-hydrophobic performance, and can be widely applied to the fields of hydrophobic and photo-thermal deicing.
The invention also discloses a preparation method of the carbon-based micro-nano photo-thermal coating, the carbon-based micro-nano photo-thermal conversion coating is prepared by simple physical chemical deposition through the adjustment of the preparation process to realize interface photo-thermal conversion and reduce the loss of photo-thermal energy, the hydrophobic light absorption layer has good optical performance and can effectively absorb sunlight, and the hydrophobic surface of the hydrophobic light absorption layer can realize photo-thermal deicing performance, so that a solar product can show remarkable photo-thermal conversion performance and extraordinary stability under severe conditions. The photo-thermal conversion efficiency of the flat plate type heat collector is greatly improved, and the service life is prolonged by the self-cleaning function. The method adopts industrial pure aluminum as a substrate layer material, carries out ultrasonic cleaning and drying on the substrate before deposition, carries out spin coating after drying, is favorable for protecting the surface of the substrate well, retains the initial microstructure of the substrate, prepares for the spin coating, ensures that the spin coating is more uniform, and has stronger bonding effect with the substrate. The finished coating is solidified, so that the phenomenon of severe expansion and contraction caused by adhesion of fluid to RTV-1 is avoided, bubbles appear in the coating on the previous layer, and the carbon nano particles are uneven when deposited on the surface, so that a bad result is caused on the whole coating. And then carrying out ultrasonic cleaning on the substrate to remove an oxide layer, pollutants and burrs on the surface of the RTV-1, wherein the surface is solidified and impurities in the rest air are attached to the surface because the solidification environment is in the air, in the spin coating process, microscopic surface burrs can appear in the solidification process because the viscosity of the RTV-1 is high, the pollutants and the burrs can be removed through the ultrasonic cleaning, the bonding force between the carbon nanoparticles and the RTV-1 can be enhanced, candle ash deposition is adopted, the distance from the wick to the substrate is controlled to be 2.9cm in a matching manner, the deposition lasts for 2min, finally, a carbon-based micro-nano photothermal coating is formed, when the candle ash is deposited on the substrate, the size of the carbon nanoparticles is related to the distance from the wick, when the deposition distance is too small, the particles are large, and the generated coating is relatively soft. When the distance is too large, the particles are small, resulting in uneven deposition. The carbon-based micro-nano photothermal coating prepared by the method can selectively absorb solar energy well, has high absorptivity and very low emissivity, and has good optical performance and good super-hydrophobic performance.
Further, in S1, the RTV-1 is more uniformly attached to the substrate by spin coating with a spin coater. Because the self-adhesion of the RTV-1 is very large, two times of spin coating are arranged during spin coating, wherein 500r/min and 20s are adopted for the first time, the RTV-1 added for the first time is spread out, 800r/min and 60s are adopted for the second time, so that the spin coating is more uniform, and the thickness of the RTV-1 coating can be controlled.
Further, when RTV-1 is spin-coated, the inside clearance cleanness of spin coater to keep dry, spin coater voltage is guaranteed to be stable to 220V this moment, and the inside clearance of spin coater guarantees not to be brought into the inside pollutant of instrument by high-speed rotation during the spin coating, makes the coating inhomogeneous and unevenness. The voltage is kept stable to ensure that the spin coating is stable and the coating thickness is uniform.
Further, in S2, the finished coating is placed in air for 10min to be solidified, and adverse factors such as thermal expansion and cold contraction, air bubbles and unevenness are avoided in the deposition process.
Furthermore, the substrate material is industrial pure aluminum with surface smoothness Ra less than 1 μm, no rusty spots and pits on the surface, and the industrial pure aluminum is used as the substrate, so that the mechanical property is good, and the heat conductivity is good. Adverse factors such as surface smoothness, surface rusts, pits and the like can all cause adverse effects on the prepared carbon-based micro-nano coating, and therefore control is needed.
Further, cleaning the substrate by using ethanol in the S1, wherein the substrate is kept flat before being cleaned by using the ethanol, the substrate is completely put into the ethanol, the distance between the substrates is kept at least 1cm in the cleaning process, and the heating temperature is kept at 28 ℃; the water level is displayed as 80mm, the working power is 100W, the cleaning time is 30min, and in the cleaning process, as the substrates are put together, the distance between the substrates is controlled to be more than 1cm, so that all the substrates can be cleaned fully and uniformly. The heating temperature is ensured to be 28 ℃, so that the impurities on the surface of the substrate can be dissolved in the ethanol solution in the cleaning process, and the cleaning time of 30min is enough to ensure the cleanness of the substrate.
Further, absolute ethyl alcohol with the purity of more than 99.7% is adopted, so that the cleaning is thorough, and the sample loss is reduced. Further, before depositing the absorption layer, the substrate treated by RTV-1 is dried in air for 10min and cleaned in ethanol for 10min, after drying, the relevant impurities in the air are attached to the RTV-1 surface, and ultrasonic cleaning in ethanol for 10min can prepare for depositing the carbon nano-particles.
Further, when the absorption layer is deposited in S3, the candle is ignited, the wick is prevented from deviating, the substrate is adjusted to move in the same horizontal direction, the moving range is ensured to cover 4 x 4cm, the distance between the wick and the substrate needs to be controlled to ensure that the deposited nano particles are uniform in size, the size of the substrate is 4 x 4cm, and when the moving range of the substrate in the horizontal direction is controlled, the nano particles can be more completely deposited. After deposition, the coating is removed and air cooled to make the carbon particles more stable.
Drawings
FIG. 1 is a schematic diagram of a cross-sectional structure of a carbon-based micro-nano photothermal coating according to the present invention;
FIG. 2 is a scanning electron microscope image of the carbon-based micro-nano photothermal coating of the present invention;
FIG. 3 is a projection electron microscope image of the carbon-based micro-nano photothermal coating of the present invention;
fig. 4 is a schematic diagram of deicing of the carbon-based micro-nano photothermal coating.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
the invention aims to prepare a carbon-based micro-nano photothermal conversion coating through simple physical and chemical deposition and adjustment of a preparation process to realize interface photothermal conversion and reduce the loss of light heat energy, the hydrophobic light absorption layer has good optical performance and can effectively absorb sunlight, and due to the hydrophobic surface of the hydrophobic light absorption layer, the photothermal deicing performance can be realized, so that a solar product shows remarkable photothermal conversion performance and extraordinary stability under severe conditions. The photo-thermal conversion efficiency of the flat plate type heat collector is greatly improved, and the service life is prolonged by the self-cleaning function.
Referring to fig. 1, a schematic diagram of a cross-sectional structure of the carbon-based micro-nano photothermal coating of the present invention is shown; the base, the bonding layer and the absorption layer are sequentially arranged from bottom to top; wherein the substrate is industrial pure aluminum, the bonding layer is RTV-1, and the absorption layer is a carbon nano-particle coating obtained from candle ash.
In order to better popularize the carbon-based micro-nano photothermal coating, the carbon-based micro-nano photothermal coating is applied to the popularization of a flat plate type heat collector and the application of the carbon-based micro-nano photothermal coating to the field of photothermal deicing in the north, the development of the novel carbon-based micro-nano photothermal coating with super hydrophobicity, high absorption rate and low emissivity is of great significance to industrial application.
The preparation method of the carbon-based micro-nano photothermal coating comprises the following steps:
adopting industrial pure aluminum as a substrate layer material, and loading the substrate layer material into a spin coater after ultrasonic cleaning and drying; the time and the speed of the spin coater are sequentially adjusted to be 20s,500r/min,60s and 800r/min; 1.5ml of RTV-1 was withdrawn by syringe, 1ml was added dropwise at the time of loading, and the remaining 0.5ml of RTV-1 was added to the substrate layer through the lid aperture of the spin coater within the first 20s at the start of the spin coater operation. Before spin coating, cleaning a substrate with ethanol to remove an oxide layer, pollutants and burrs on the surface of the substrate; and then drying the spin-coated coating in air for 10min, performing ultrasonic cleaning for 10min, igniting the candle through physical and chemical deposition, performing uniform deposition at a position 2.9cm away from the candle wick for 2min, finally taking off the coating, and performing natural cooling in air to stabilize the carbon particles.
Further, the depositable substrate material may be an industrially pure aluminum with a surface finish Ra <1 μm, surface rust free spots, pits.
Further, when the substrate is cleaned by using ethanol, absolute ethanol with the purity of more than 99.7 percent is poured in and the beaker is wrapped, the internal temperature of the cleaning machine is kept at 28 ℃ in the ultrasonic cleaning process, and the height of a water line is higher than that of the absolute ethanol in the beaker; during wrapping, attention is paid to prevent water from entering the beaker, the substrate and the base cannot be adsorbed mutually inside the beaker, the distance is kept at 1cm, the working power is 100W, and the ultrasonic cleaning time is 30min.
Further, when the bonding layer was spin-coated, RTV-1 was spin-coated 2 times at a motor voltage of 220V for 20s at a speed of 500rpm, at which time 1ml of RTV-1 was uniformly spread. The second spin coating was carried out with a motor voltage of 220V, a spin coating time of 60s and a spin coating speed of 800rpm, while the thickness of the bonding layer was uniform and the viscosity was moderate. After the graph selection is finished, the graph is cured in the air for 10min, and ultrasonic cleaning is carried out again in absolute ethyl alcohol for 10min.
Further, when depositing the absorbing layer, the candle was ignited, the position of the candle wick was kept at 2.9cm from the substrate, and by moving horizontally and uniformly, the candle ash was deposited completely and uniformly on the 4X 4cm substrate.
Further, the carbon-based micro-nano photo-thermal coating can be applied to solar flat plate collectors and photo-thermal deicing industrial products.
Referring to fig. 2, which is a scanning electron microscope image of the carbon-based micro-nano photothermal coating of the present invention, it can be seen that carbon nanoparticles are dense and present regular clusters, and the particle size is about 0.1-0.2 um. Such a structure results in a relatively large contact angle with itself, resulting in a relatively good surface wetting.
Referring to fig. 3, a projection electron microscope image of the carbon-based micro-nano photothermal coating of the present invention shows that carbon nanoparticles have a typical spherical amorphous carbon structure, and the spherical structure has non-uniform size and can reach 80-100nm in diameter. They are adsorbed to each other by relatively small van der waals forces to form clusters.
Referring to fig. 4, a schematic diagram of deicing of the carbon-based micro-nano photothermal coating of the present invention is shown, and since the coating has good photothermal conversion performance and hydrophobicity, we preliminarily verify that the coating has photothermal deicing performance. When the coating with ice beads was taken out and placed at 45 ° in a weak sunlight place, we seen by a timer that the ice beads had fallen at 7s, while the ice did not completely melt. The motion tracks are as (a) to (b).
Example 1
1. Putting 1235 aluminum alloy with surface roughness Ra less than 1 μm, surface rust-free points and pits into a spin coater after ultrasonic cleaning and drying;
2. absolute ethyl alcohol with the purity of 99.7 percent is poured into the beaker, the mutual contact between the absolute ethyl alcohol and the beaker is ensured by utilizing the self structure of aluminum alloy, the internal temperature of the cleaning machine is kept at 28 ℃ in the ultrasonic cleaning process, and the height of a water line is higher than that of the absolute ethyl alcohol in the beaker; during wrapping, attention is paid to prevent water from entering the beaker, the substrate and the base cannot be adsorbed mutually inside the beaker, the distance is kept at 1cm, the working power is 100W, and the ultrasonic cleaning time is 30min.
3. When the bonding layer is spin-coated, 2 times of spin-coating RTV-1, motor voltage 220V, spin-coating time 20s and spin-coating speed 500rpm are adopted, and at the moment, 1ml of RTV-1 is uniformly coated. The second spin coating was carried out with a motor voltage of 220V, a spin coating time of 60s and a spin coating speed of 800rpm, while the thickness of the bonding layer was uniform and the viscosity was moderate. After the image selection is finished, the image is cured in the air for 10min, and is ultrasonically cleaned again in absolute ethyl alcohol for 10min.
4. When the absorbing layer is deposited, the candle is ignited, the position of the wick of the candle is kept at 2.9cm from the substrate all the time, and the candle ash can be completely and uniformly deposited on the substrate of 4 multiplied by 4cm by horizontally and uniformly moving.
The performance of the carbon-based micro-nano photo-thermal coating prepared on the aluminum alloy substrate with the trademark 1235 is evaluated by adopting an ultraviolet/visible light/near-infrared spectrophotometer with a 150mm integrating sphere and an infrared spectrometer with an A562-G/Q integrating sphere. And (3) testing results: the absorptivity of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate reaches 96%.
A contact angle measuring instrument with the liquid volume of 2ul is added to evaluate the performance of the carbon-based micro-nano photothermal coating prepared on the aluminum alloy substrate with the trademark of 1235. And (3) testing results: the contact angle of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate is up to 163 degrees.
Example 2
1. Putting 1235 aluminum alloy with surface roughness Ra less than 1 μm, surface rust-free points and pits into a spin coater after ultrasonic cleaning and drying;
2. absolute ethyl alcohol with the purity of 99.7 percent is poured into the beaker, the mutual contact between the absolute ethyl alcohol and the beaker is ensured by utilizing the self structure of aluminum alloy, the internal temperature of the cleaning machine is kept at 28 ℃ in the ultrasonic cleaning process, and the height of a water line is higher than that of the absolute ethyl alcohol in the beaker; during wrapping, attention is paid to prevent water from entering the beaker, the substrate and the base cannot be adsorbed mutually inside the beaker, the distance is kept at 1cm, the working power is 100W, and the ultrasonic cleaning time is 30min.
3. When the bonding layer is spin-coated, 2 times of spin-coating RTV-1, motor voltage 220V, spin-coating time 20s and spin-coating speed 500rpm are adopted, and at the moment, 1ml of RTV-1 is uniformly coated. The motor voltage is set to be 220V in the second spin coating, the spin coating time is 60s, the spin coating speed is 1500rpm, the thickness of the bonding layer is too thin, spin wire drawing occurs, and the surface quality is not high. After the image selection is finished, the image is cured in the air for 10min, and is ultrasonically cleaned again in absolute ethyl alcohol for 10min.
4. When the absorbing layer is deposited, the candle is ignited, the position of the candle wick is kept at 2.9cm from the substrate all the time, and the candle ash can be completely and uniformly deposited on the substrate of 4 multiplied by 4cm by horizontally and uniformly moving.
The performance of the carbon-based micro-nano photo-thermal coating prepared on the aluminum alloy substrate with the trademark 1235 is evaluated by adopting an ultraviolet/visible light/near-infrared spectrophotometer with a 150mm integrating sphere and an infrared spectrometer with an A562-G/Q integrating sphere. And (3) testing results: the absorption rate of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate reaches 90%.
The performance of the carbon-based micro-nano photo-thermal coating prepared on the aluminum alloy substrate with the trademark 1235 is evaluated by adopting a contact angle measuring instrument with the volume of 2ul of added liquid. And (3) testing results: the contact angle of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate is up to 160 degrees. The stability of the whole coating is not good enough, and the nano particles are easy to fall off.
Example 3
1. Putting 1235 aluminum alloy with surface roughness Ra less than 1 μm, surface rust-free points and pits into a spin coater after ultrasonic cleaning and drying;
2. absolute ethyl alcohol with the purity of 99.7 percent is poured into the beaker, the aluminum alloy self-structure is utilized to ensure that the aluminum alloy self-structure does not contact with each other, the internal temperature of the cleaning machine is kept at 28 ℃ in the ultrasonic cleaning process, and the height of a water line is higher than that of the absolute ethyl alcohol in the beaker; during wrapping, attention is paid to prevent water from entering the beaker, the substrate and the base cannot be adsorbed mutually inside the beaker, the distance is kept at 1cm, the working power is 100W, and the ultrasonic cleaning time is 30min.
3. When the bonding layer is spin-coated, 2 times of spin-coating RTV-1, motor voltage 220V, spin-coating time 20s and spin-coating speed 500rpm are adopted, and at the moment, 1ml of RTV-1 is uniformly coated. The second spin coating was set to motor voltage 220V, spin time 60s, spin speed 500rpm, and the thickness of the bonding layer was too thick. After the spin coating is finished, the coating is cured in air for 10min, and is ultrasonically cleaned again in absolute ethyl alcohol for 10min.
4. When the absorbing layer is deposited, the candle is ignited, the position of the wick of the candle is kept at 2.9cm from the substrate all the time, and the candle ash can be completely and uniformly deposited on the substrate of 4 multiplied by 4cm by horizontally and uniformly moving.
The performance of the carbon-based micro-nano photothermal coating prepared on the aluminum alloy substrate with the brand No. 1235 is evaluated by adopting an ultraviolet/visible light/near-infrared spectrophotometer with a 150mm integrating sphere and an infrared spectrometer with an A562-G/Q integrating sphere. And (3) testing results: the absorptivity of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate reaches 92%.
A contact angle measuring instrument with the liquid volume of 2ul is added to evaluate the performance of the carbon-based micro-nano photothermal coating prepared on the aluminum alloy substrate with the trademark of 1235. And (3) testing results: the contact angle of the carbon-based micro-nano photothermal coating on the 1235 aluminum alloy substrate is up to 161 degrees. The coating is too thick and heavy, and its own surface structure is affected.
Example 4
1. Putting 1235 aluminum alloy with surface roughness Ra less than 1 μm, surface rust-free points and pits into a spin coater after ultrasonic cleaning and drying;
2. absolute ethyl alcohol with the purity of 99.7 percent is poured into the beaker, the aluminum alloy self-structure is utilized to ensure that the aluminum alloy self-structure does not contact with each other, the internal temperature of the cleaning machine is kept at 28 ℃ in the ultrasonic cleaning process, and the height of a water line is higher than that of the absolute ethyl alcohol in the beaker; during wrapping, attention needs to be paid to prevent water from entering the beaker, the inside of the beaker cannot enable the substrate and the base to be mutually adsorbed, the distance is kept to be 1cm, the working power is 100W, and the ultrasonic cleaning time is 30min.
3. When the bonding layer is spin-coated, 2 times of spin coating RTV-1, motor voltage 220V, spin coating time 20s and spin coating speed 500rpm are adopted, and at the moment, 1ml of RTV-1 is uniformly coated. The motor voltage 220V, the spin time 60s and the spin speed 800rpm are set for the second spin coating, and the thickness of the bonding layer is uniform and the viscosity is moderate. After the spin coating is finished, the coating is cured in air for 10min, and is ultrasonically cleaned again in absolute ethyl alcohol for 10min.
4. When the absorbing layer is deposited, the candle is ignited, the position of the candle wick is kept at 2cm from the substrate all the time, and the candle ash can be completely and uniformly deposited on the substrate of 4 multiplied by 4cm by horizontally and uniformly moving.
The performance of the carbon-based micro-nano photo-thermal coating prepared on the aluminum alloy substrate with the trademark 1235 is evaluated by adopting an ultraviolet/visible light/near-infrared spectrophotometer with a 150mm integrating sphere and an infrared spectrometer with an A562-G/Q integrating sphere. And (3) testing results: the absorptivity of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate reaches 95.4%.
The performance of the carbon-based micro-nano photo-thermal coating prepared on the aluminum alloy substrate with the trademark 1235 is evaluated by adopting a contact angle measuring instrument with the volume of 2ul of added liquid. And (3) testing results: the contact angle of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate reaches 152 degrees.
Example 5
1. Putting 1235 aluminum alloy with surface roughness Ra less than 1 μm, surface rust-free points and pits into a spin coater after ultrasonic cleaning and drying;
2. absolute ethyl alcohol with the purity of 99.7 percent is poured into the beaker, the aluminum alloy self-structure is utilized to ensure that the aluminum alloy self-structure does not contact with each other, the internal temperature of the cleaning machine is kept at 28 ℃ in the ultrasonic cleaning process, and the height of a water line is higher than that of the absolute ethyl alcohol in the beaker; during wrapping, attention is paid to prevent water from entering the beaker, the substrate and the base cannot be adsorbed mutually inside the beaker, the distance is kept at 1cm, the working power is 100W, and the ultrasonic cleaning time is 30min.
3. When the bonding layer is spin-coated, 2 times of spin-coating RTV-1, motor voltage 220V, spin-coating time 20s and spin-coating speed 500rpm are adopted, and at the moment, 1ml of RTV-1 is uniformly coated. The second spin coating was carried out with a motor voltage of 220V, a spin coating time of 60s and a spin coating speed of 800rpm, while the thickness of the bonding layer was uniform and the viscosity was moderate. After the image selection is finished, the image is cured in the air for 10min, and is ultrasonically cleaned again in absolute ethyl alcohol for 10min.
4. When the absorbing layer is deposited, the candle is ignited, the position of the candle wick is kept at 4cm from the substrate all the time, and the candle ash can be completely and uniformly deposited on the substrate of 4 multiplied by 4cm by horizontally and uniformly moving.
The performance of the carbon-based micro-nano photo-thermal coating prepared on the aluminum alloy substrate with the trademark 1235 is evaluated by adopting an ultraviolet/visible light/near-infrared spectrophotometer with a 150mm integrating sphere and an infrared spectrometer with an A562-G/Q integrating sphere. And (3) testing results: the absorptivity of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate reaches 96%.
A contact angle measuring instrument with the liquid volume of 2ul is added to evaluate the performance of the carbon-based micro-nano photothermal coating prepared on the aluminum alloy substrate with the trademark of 1235. And (3) testing results: the contact angle of the carbon-based micro-nano photo-thermal coating on the 1235 aluminum alloy substrate reaches 145 degrees.
In summary, the invention discloses a carbon-based micro-nano photo-thermal coating and a preparation method thereof, belonging to the field of solar photo-thermal conversion, wherein the carbon-based micro-nano photo-thermal coating comprises a film-coated substrate, RTV-1 is sequentially coated on the surface of the substrate in a spin mode, and candle ash is deposited; the method is characterized in that: the film-coated substrate takes metal aluminum as an infrared reflecting layer and has the function of reducing the infrared emissivity of the coating; the RTV-1 layer is a deposition layer and has the function of enhancing the binding force of the carbon nano-particle coating; the carbon-based micro-nano layer is a candle ash deposition layer and has the functions of absorbing solar radiation and improving the absorption performance of the surface. The carbon-based micro-nano photo-thermal coating prepared by the method has high absorptivity and low emissivity, can greatly improve the photo-thermal conversion efficiency of the flat plate type heat collector, is simple to prepare, is applied to relatively low actual cost, and can be applied to the field of solar photo-thermal.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (7)
1. A preparation method of a carbon-based micro-nano photothermal coating is characterized by comprising a substrate, a bonding layer and an absorption layer from bottom to top in sequence; the substrate is made of industrial pure aluminum, the bonding layer is RTV-1, and the absorption layer is a carbon nano-particle coating; the carbon-based micro-nano photothermal coating is used for photothermal deicing;
the preparation method of the carbon-based micro-nano photothermal coating comprises the following steps,
s1: adopting industrial pure aluminum as a substrate layer material, and carrying out ultrasonic cleaning and drying on the substrate;
s2: spin-coating on a dry substrate, solidifying the finished coating, then ultrasonically cleaning the coating on the substrate, and removing an oxide layer, pollutants and burrs on the surface of RTV-1 to form a bonding layer;
s3: depositing candle ash, controlling the distance from a lamp wick to a substrate to be 2.9cm in the deposition process, and depositing for 2min to form an absorption layer;
s2, spin coating is carried out by a spin coater, the first spin coating time is adjusted to be 20S, the spin coating speed is 500rpm, the second spin coating time is 60S, and the spin coating speed is 800rpm;
s1, cleaning the substrate by using ethanol, wherein the flat substrate is completely placed in the ethanol before the substrate is cleaned by using the ethanol, the distance between the substrates is kept at least 1cm in the cleaning process, and the heating temperature is kept at 28 ℃; the water level is 80mm, the working power is 100W, and the cleaning time is 30min.
2. The method for preparing the carbon-based micro-nano photo-thermal coating according to claim 1, wherein the electromechanical voltage of a spin coater is stabilized to 220V when RTV-1 is spin-coated.
3. The preparation method of the carbon-based micro-nano photothermal coating according to claim 1, wherein in S2, the finished coating is solidified in air for 10min.
4. The preparation method of the carbon-based micro-nano photothermal coating according to claim 1, wherein the substrate material is industrial pure aluminum with surface smoothness Ra <1 μm, and surface rustless spots and pits.
5. The method for preparing the carbon-based micro-nano photo-thermal coating according to claim 1, wherein the ethanol is absolute ethanol with purity of more than 99.7%.
6. The preparation method of the carbon-based micro-nano photo-thermal coating according to claim 1, wherein after S2 is finished, the substrate and the bonding layer are dried in air for 10min and cleaned in ethanol for 10min.
7. The method for preparing the carbon-based micro-nano photo-thermal coating according to claim 1, wherein the substrate moves in the same horizontal direction when the absorption layer is deposited in S3, the moving range covers 4 x 4cm, and after the deposition is finished, the coating is taken down and cooled in air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111334060.3A CN114054318B (en) | 2021-11-11 | 2021-11-11 | Carbon-based micro-nano photo-thermal coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111334060.3A CN114054318B (en) | 2021-11-11 | 2021-11-11 | Carbon-based micro-nano photo-thermal coating and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114054318A CN114054318A (en) | 2022-02-18 |
| CN114054318B true CN114054318B (en) | 2022-12-16 |
Family
ID=80275120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111334060.3A Active CN114054318B (en) | 2021-11-11 | 2021-11-11 | Carbon-based micro-nano photo-thermal coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114054318B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115534427B (en) * | 2022-09-21 | 2023-06-23 | 中国科学院宁波材料技术与工程研究所 | Super-hydrophobic photo-thermal film for agriculture, and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250578A (en) * | 2011-05-23 | 2011-11-23 | 天津大学 | Silicon rubber adhesive and preparation method thereof |
| KR101449589B1 (en) * | 2013-10-17 | 2014-10-08 | 한국과학기술원 | Fabrication method of a stable superhydrophobic surface through the fixation of nanoparticle by using a paraffin wax |
| CN106757016A (en) * | 2016-11-16 | 2017-05-31 | 陕西盛迈石油有限公司 | The preparation method on super-hydrophobic copper surface |
| CN108793298A (en) * | 2018-06-13 | 2018-11-13 | 苏州大学 | A kind of solar energy sea water desalination apparatus based on candle ash |
| CN109972111A (en) * | 2019-04-29 | 2019-07-05 | 陕西科技大学 | A kind of highly doped MoOxBase photothermal conversion coating and preparation method thereof |
| CN112646485A (en) * | 2020-12-01 | 2021-04-13 | 中国矿业大学(北京) | Preparation method of hydrophobic wax-proof composite coating and hydrophobic wax-proof composite coating |
| CN113528010A (en) * | 2021-08-27 | 2021-10-22 | 电子科技大学 | Preparation and application of super-smooth coating with long-acting ice-thinning characteristic |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2217865A4 (en) * | 2007-10-18 | 2014-03-05 | Alliance Sustainable Energy | High temperature solar selective coatings |
-
2021
- 2021-11-11 CN CN202111334060.3A patent/CN114054318B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250578A (en) * | 2011-05-23 | 2011-11-23 | 天津大学 | Silicon rubber adhesive and preparation method thereof |
| KR101449589B1 (en) * | 2013-10-17 | 2014-10-08 | 한국과학기술원 | Fabrication method of a stable superhydrophobic surface through the fixation of nanoparticle by using a paraffin wax |
| CN106757016A (en) * | 2016-11-16 | 2017-05-31 | 陕西盛迈石油有限公司 | The preparation method on super-hydrophobic copper surface |
| CN108793298A (en) * | 2018-06-13 | 2018-11-13 | 苏州大学 | A kind of solar energy sea water desalination apparatus based on candle ash |
| CN109972111A (en) * | 2019-04-29 | 2019-07-05 | 陕西科技大学 | A kind of highly doped MoOxBase photothermal conversion coating and preparation method thereof |
| CN112646485A (en) * | 2020-12-01 | 2021-04-13 | 中国矿业大学(北京) | Preparation method of hydrophobic wax-proof composite coating and hydrophobic wax-proof composite coating |
| CN113528010A (en) * | 2021-08-27 | 2021-10-22 | 电子科技大学 | Preparation and application of super-smooth coating with long-acting ice-thinning characteristic |
Non-Patent Citations (2)
| Title |
|---|
| Durable and Scalable Candle Soot Icephobic Coating with Nucleation and Fracture Mechanism;Muhammad Imran Jamil;《ACS Applied Materials》;20190801;第11卷;第31532-31542页 * |
| 超疏水材料在防/除冰技术中的应用研究进展;李君;《复合材料学报》;20210820;第39卷(第1期);第23-38页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114054318A (en) | 2022-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sarkın et al. | A review of anti-reflection and self-cleaning coatings on photovoltaic panels | |
| US9353268B2 (en) | Anti-reflective and anti-soiling coatings for self-cleaning properties | |
| CN114054318B (en) | Carbon-based micro-nano photo-thermal coating and preparation method thereof | |
| US20140261673A1 (en) | Tuning the anti-reflective, abrasion resistance, anti-soiling and self-cleaning properties of transparent coatings for different glass substrates and solar cells | |
| CN101800130B (en) | Method for preparing dye-sensitized solar cell compound light anode with zinc oxide nanometer structure | |
| Xin et al. | A novel route to prepare weather resistant, durable antireflective films for solar glass | |
| Zhu et al. | A superhydrophobic solar selective absorber used in a flat plate solar collector | |
| CN110950546B (en) | High-reflection coating of solar cell glass plate and preparation method thereof | |
| CN101770042A (en) | Low-reflection optical interface layer and preparation method thereof | |
| Xin et al. | Effects of polysiloxane doping on transmittance and durability of sol–gel derived antireflective coatings for photovoltaic glass | |
| CN102795788A (en) | Preparation method of SiO2 film and its application | |
| CN116535904B (en) | Transparent photo-thermal liquid anti-icing/deicing coating and preparation method thereof | |
| CN107902919A (en) | A kind of antireflective super-hydrophobic glass film and preparation method thereof | |
| CN111960688A (en) | High-transmittance nano silicon oxide film and preparation process thereof | |
| CN102603205A (en) | Forming process of anti-reflecting coating for hood glass tube of solar heat collector tube | |
| CN1059276C (en) | Preparation method of silicon dioxide antireflection film | |
| CN112147722A (en) | Antireflection film for photovoltaic glass and preparation method and application thereof | |
| EP3090990A1 (en) | Coated glass for solar reflectors | |
| Liang et al. | Light trapping PMMA planar ridged waveguide on a laser textured silicon substrate for ultra-low reflectivity | |
| CN110104956A (en) | A kind of preparation method of solar photovoltaic assembly self-cleaning surface film layer | |
| Yu et al. | Fabrication of a superhydrophobic surface with photothermal electrical conversion performance for anti-icing | |
| CN218989139U (en) | Coating photo-thermal repairing material | |
| CN116925624B (en) | Self-cleaning anti-reflection coating, coating and preparation method | |
| CN114686882B (en) | Solar thermal deicing coating capable of selectively absorbing sunlight and preparation method thereof | |
| CN219892190U (en) | Novel self-repairing self-cleaning photovoltaic module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |