Transparent radiation material and preparation and application thereof

Abstract

The invention discloses a transparent radiation material as well as preparation and application thereof. The transparent radiation material comprises a transparent substrate layer, a transparent reflecting layer, a transparent emitting layer and a hydrophobic layer which are sequentially stacked, the transparent reflecting layer comprises a first Ag layer, a ZnO layer, a second Ag layer and a SiO2 layer which are stacked in sequence, and the first Ag layer is attached to the transparent substrate layer; the transparent emission layer is a PDMS / ZrO2 / SiO2 compound layer; according to the material, through cooperation of the transparent reflecting layer and the transparent emitting layer, the infrared radiation capacity of the material can be greatly enhanced, efficient passive cooling at the environment temperature is achieved, the surface temperature is lower than the environment temperature by 5 DEG C or above, indoor temperature rising is effectively slowed down, the material is remarkably superior to a traditional material, and therefore air conditioner energy consumption of buildings or equipment is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a transparent radiation material and a preparation and application thereof. Background Art

[0002] With global warming and increasing energy consumption, the development of new energy-saving materials has become a hot topic of research. Radiative cooling technology uses the high transmittance of the earth's atmosphere to infrared radiation of specific wavelengths to convert unwanted heat into infrared rays of these wavelengths and radiate them into space through the atmospheric window, thereby achieving a cooling effect. This type of cooling has great energy-saving potential because it does not rely on traditional refrigerants or energy consumption, but uses natural processes to achieve cooling. In the energy distribution of sunlight, visible light (400-700nm) and near-infrared light (700-2500nm) account for about 95%, while the atmosphere has a high transmittance (average transmittance of 85%) for thermal radiation in the 8-13µm wavelength range, which is called the atmospheric window. In order to maximize the radiation capacity of the atmospheric transparent window in the infrared band, the radiative cooling film needs to have a high reflectivity in the entire solar band and a high emissivity in the infrared band.

[0003] However, in order to ensure the cooling effect of the radiative cooling film, the radiative cooling film is usually optically opaque, which limits their use in transparent or translucent applications such as glass curtain walls and automotive glass. But if the radiative cooling film is adjusted to a transparent film, the radiative cooling effect is poor.

[0004] Therefore, it is necessary to provide a transparent radiation material with good radiation cooling effect. Summary of the invention

[0005] In view of this, the present application provides a transparent radiation material and its preparation and application, which are used to solve the problem of how to improve the radiation cooling effect of the transparent radiation material.

[0006] In order to achieve the above technical objectives, this application adopts the following technical solutions: In the first aspect, the present application provides a transparent radiation material, comprising a transparent base layer, a transparent reflective layer, a transparent emission layer, and a hydrophobic layer stacked in sequence; the transparent reflective layer comprises a first Ag layer, a ZnO layer, a second Ag layer, and a SiO2 layer stacked in sequence, and the first Ag layer is bonded to the transparent base layer; the transparent emission layer is a PDMS / ZrO2 / SiO2 composite layer.

[0007] Preferably, the transparent substrate layer comprises one or more of a polyolefin elastomer film and a nanoporous polyethylene film, and the thickness of the transparent substrate layer is 5-80 μm.

[0008] Preferably, the particle size of the Ag particles in the first Ag layer and the second Ag layer is 10-20 nm, and the particle size of the ZnO particles in the ZnO layer is 10-75 nm.

[0009] Preferably, the thickness of the transparent reflective layer is 170-180 nm, the thickness of the first Ag layer and the second Ag layer of the transparent reflective layer are both 10-20 nm, and the thickness ratio of the ZnO layer to the SiO2 layer is 1:1-1.2.

[0010] Preferably, the thickness of the transparent emission layer is 30-100 μm.

[0011] Preferably, in the transparent emission layer, the particle size of ZrO2 is 50-1000nm.

[0012] Preferably, the hydrophobic layer comprises a mixture of trichloro(1H,1H,2H,2H-perfluorooctyl)silane and cyclohexane.

[0013] In a second aspect, the present application provides a method for preparing a transparent radiation material, comprising the following steps: S1. Obtain a transparent basal layer; S2. A first Ag layer, a ZnO layer, a second Ag layer, and a SiO2 layer are sequentially coated or deposited on the surface of the transparent substrate layer to obtain a transparent reflective layer; S3. A mixed solution containing PDMS, ZrO2, SiO2 and a PDMS curing agent is coated on the transparent reflective layer to obtain a transparent emission layer; S4. A mixed solution of trichloro(1H,1H,2H,2H-perfluorooctyl)silane and cyclohexane is coated on the surface of the transparent emission layer to prepare a hydrophobic layer, thereby obtaining a transparent radiation material.

[0014] Preferably, the mass ratio of PDMS:ZrO2:SiO2 is 100:40:1-20.

[0015] In a third aspect, the present application provides an application of a transparent radiation material in the automotive field.

[0016] The beneficial effects of this application are as follows: 1. Significant radiation cooling effect: The material of the present invention can greatly enhance the infrared radiation capacity of the material by combining a transparent reflective layer with a transparent emissive layer, and achieve efficient passive cooling at ambient temperature. The surface temperature is more than 5°C lower than the ambient temperature, effectively slowing down the rise in indoor temperature, which is significantly better than traditional materials, thereby effectively reducing the air-conditioning energy consumption of buildings or equipment.

[0017] 2. Excellent self-cleaning performance: The super-hydrophobic layer on the surface of the material can make raindrops or water droplets slide off quickly, taking away dust and dirt, keeping the surface of the material clean and transparent, reducing the need for regular cleaning and reducing maintenance costs.

[0018] 3. Improve energy efficiency and environmental adaptability: The efficient radiation cooling capacity of the material of the present invention helps to reduce the use of air conditioning and reduce energy consumption. At the same time, the super hydrophobic property enhances the weather resistance and stability of the material, making it suitable for use in various climatic conditions and having excellent environmental adaptability.

[0019] 4. Extend material life and reduce maintenance: The self-cleaning effect of the super-hydrophobic layer reduces the erosion of pollutants on the material. At the same time, the stable performance of the radiation cooling layer ensures that the performance of the material does not decay during long-term use, effectively extending the service life of the material.

[0020] 5. Economy and sustainability: By reducing energy consumption and maintenance costs, the material of the present invention shows significant economic benefits in long-term use. At the same time, its environmental protection characteristics meet the requirements of green building and sustainable development and have good ecological benefits.

[0021] 6. Improve user experience and comfort: The use of the material of the present invention not only reduces indoor temperature and improves thermal comfort, but its self-cleaning ability also reduces dependence on manual cleaning, thereby improving the quality of users' living and working environment.

[0022] 7. Good lighting: The material of the present invention has high transparency, which improves the visualization of the material and greatly broadens the application field of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a test chart of the optical properties of the radiation material; Figure 2 This is a cooling test diagram for radiation materials; Figure 3 This is the contact angle test diagram of the radiation material; Figure 4 This is a test chart of the chemical stability of radiation materials; Figure 5 is the stress-strain diagram of the radiation material; Figure 6 This is a test diagram of the cooling effect of radiation materials. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Existing radiative cooling materials usually face the following challenges: 1. Optical transparency: To increase the emissivity of infrared radiation, materials often need to sacrifice transparency, which limits their use in applications that require transparent or translucent properties.

[0026] 2. Spectral selectivity: Ideal radiative cooling materials should have high reflectivity in the solar band and high emissivity in the infrared band. However, achieving this spectral selectivity is a technical challenge.

[0027] 3. Durability and stability: Radiative cooling materials need to maintain their performance under a variety of environmental conditions, including UV exposure, temperature changes, and humidity changes.

[0028] Although existing radiative cooling materials have achieved some success in certain applications, their limitations in transparent or translucent applications restrict their wider application. For example, glass curtain walls and car windows require both good optical transparency and radiative cooling performance, and existing materials often have difficulty meeting these requirements.

[0029] Based on this, this application was created.

[0030] The present application provides a transparent radiation material (TRC film), comprising a transparent base layer, a transparent reflective layer, a transparent emission layer, and a hydrophobic layer stacked in sequence; the transparent reflective layer comprises a first Ag layer, a ZnO layer, a second Ag layer, and a SiO2 layer stacked in sequence, and the first Ag layer is bonded to the transparent base layer; the transparent emission layer is a PDMS / ZrO2 / SiO2 composite layer.

[0031] The transparent reflective layer of the present application has high reflectivity in the near-infrared solar wavelength range, the transparent emitting layer has high emissivity in the mid-infrared wavelength range, and has low absorptivity and high transmittance in the visible light wavelength range; by controlling the refraction relationship between the transparent emitting layer and the transparent reflective layer, the two are combined to ensure high transparency of visible light without affecting lighting, and to achieve efficient radiation cooling effect. The material of the present invention can have high reflectivity in the solar band, high emissivity in the infrared band, and maintain transparency, thereby overcoming the limitations of the prior art and providing new solutions for building energy conservation and the automotive industry.

[0032] The transparent emission layer is a PDMS / ZrO2 / SiO2 composite layer, in which PDMS has good light transmittance and high emissivity in the atmospheric window (8-13μm), which can effectively achieve radiative cooling. At the same time, polydimethylsiloxane (PDMS), as a high molecular polymer elastomer, is hydrophobic, wear-resistant and chemically inert, and exhibits excellent optical properties in the mid-infrared band. On the other hand, zirconium dioxide (ZrO2) nanoparticles, as sunlight-reflecting particles, have stable chemical properties, high refractive index (RI) and wide band gap (>4.0 eV). SiO2 basically does not absorb sunlight, and the asymmetric stretching vibration of its Si-O bond at 9.7μm in the atmospheric window will produce strong absorption and emission effects in this band, and has certain radiation cooling performance. In addition, hydrophobic nano-silica (SiO2) has high infrared emission characteristics, which can not only construct nano-rough structures to enhance the properties of the material surface, but also significantly improve the hydrophobic properties of the material. PDMS and SiO2 complement each other and jointly promote the optimization of coating performance.

[0033] In some embodiments, the transparent substrate layer includes one or more of a polyolefin elastomer film and a nanoporous polyethylene film, and the thickness of the transparent substrate layer is 5-80 μm, and preferably, the thickness of the transparent substrate layer is 20-80 μm.

[0034] Polyolefin elastomer (POE) as a substrate has high light transmittance, good thermal stability and weather resistance. In some embodiments, the preparation process of polyolefin elastomer (POE) film as a transparent base layer is as follows: POE: n-hexane is mixed in a ratio of 1:14 (m / V), and then heated in a water bath at 40-80°C for 0.5-3h to dissolve to obtain a transparent solution, which is then cast and coated, and naturally dried at room temperature to form a film. Among them, too high a dissolution temperature will accelerate the evaporation rate of the solvent and affect the viscosity of the solution. Too high a heating temperature or too short a heating time will cause the degradation of the polymer; too low a heating temperature or too short a heating time will affect the solubility of the polymer.

[0035] The preparation method of nanoporous polyethylene membrane is as follows: PE powder, paraffin and antioxidant 1010 are added to a round-bottom flask in a mass ratio of 2:98:0.01, stirred at 150 °C for 3 hours to form a uniform solution, the heated solution is pushed into a sheet mold to form a gel-like film and uniaxially stretched, and then the gel is extracted with cyclohexane multiple times and dried.

[0036] In some embodiments, the particle size of the Ag particles in the first Ag layer and the second Ag layer is 10-20 nm, the particle size of the ZnO particles in the ZnO layer is 10-75 nm, and the particle size of the SiO2 particles in the SiO2 layer is 0.5-3 μm.

[0037] In some embodiments, the thickness of the transparent reflective layer is 170-180 nm, the thickness of the first Ag layer and the second Ag layer of the transparent reflective layer are both 10-20 nm, and the thickness ratio of the ZnO layer to the SiO2 layer is 1:1-1.2.

[0038] In some embodiments, the transparent emissive layer has a thickness of 30-100 μm.

[0039] In some embodiments, in the transparent emission layer, the ZrO2 particle size is 50-1000 nm.

[0040] In some embodiments, the hydrophobic layer includes a mixture of trichloro(1H,1H,2H,2H-perfluorooctyl)silane and cyclohexane.

[0041] The present application provides a method for preparing a transparent radiation material, comprising the following steps: S1. Obtain a transparent basal layer; S2. A first Ag layer, a ZnO layer, a second Ag layer, and a SiO2 layer are sequentially coated or deposited on the surface of the transparent substrate layer to obtain a transparent reflective layer; S3. A mixed solution containing PDMS, ZrO2, SiO2 and a PDMS curing agent is coated on the transparent reflective layer to obtain a transparent emission layer; S4. A mixed solution of trichloro(1H,1H,2H,2H-perfluorooctyl)silane and cyclohexane is coated on the surface of the transparent emission layer to prepare a hydrophobic layer, thereby obtaining a transparent radiation material (TRC film).

[0042] Specifically, the preparation method of the transparent radiation material is as follows: Two transparent reflective layers containing silver nanoparticles are coated or deposited on a POE substrate. Each silver layer with a thickness of about 11 nm is protected by a ZnO layer and a SiO2 layer, respectively, to enhance the optically selective reflectivity in the ultraviolet and near-infrared bands and achieve a radiation cooling effect. The structural order of the transparent reflective layer is the first Ag layer, the ZnO layer, the second Ag layer, and the SiO2 layer. Then, a mixed solution containing PDMS, ZrO2, SiO2, and a PDMS curing agent is covered on the transparent reflective layer by screen printing, spin coating, or scraping to form an optically selective transparent emission layer. Finally, 20 microliters of trichloro(1H,1H,2H,2H-perfluorooctyl)silane (PFOTS, VWR) is mixed with 10 mL of cyclohexane (VWR), and then the transparent emission layer is sprayed to obtain a superhydrophobic transparent radiation cooling material.

[0043] Among them, in the mixed solution containing PDMS, ZrO2, SiO2, and PDMS curing agent, the mass ratio of polydimethylsiloxane (PDMS) to polydimethylsiloxane curing agent is 10:1; the mass ratio of PDMS: ZrO2: SiO2 is 100:40: 1-20. The preparation method of the mixed solution containing PDMS, ZrO2, SiO2, and PDMS curing agent is: polydimethylsiloxane (PDMS), polydimethylsiloxane curing agent and ethyl acetate are stirred at a mass ratio of 10:1: (10-20) for 10-30 minutes, and then ZrO2 and SiO2 are added, and stirring is continued for 10-60 minutes.

[0044] The transparent radiation material prepared by the above method realizes indoor thermal regulation by controlling the visible light spectrum, completely reflecting the near-infrared solar spectrum, and maintaining broadband high emissivity in the mid-infrared spectrum.

[0045] The present application provides an application of a transparent radiation material in the automotive field.

[0046] The present solution is further described below through specific embodiments.

[0047] Example 1 A method for preparing a transparent radiation material comprises the following steps: S1. POE and n-hexane were mixed in a ratio of 1:14 (m / V), and then heated in a water bath at 65°C for 2 h to dissolve to obtain a transparent solution, which was then cast and coated, and dried naturally at room temperature to form a transparent substrate layer with a thickness of 70 μm. S2. A first Ag layer having a thickness of 10 nm, a ZnO layer having a thickness of 75 nm, a second Ag layer having a thickness of 10 nm, and a SiO2 layer having a thickness of 75 nm are sequentially coated on the surface of the transparent substrate layer to obtain a transparent reflective layer having a thickness of 170 nm; S3. Stir polydimethylsiloxane (PDMS), polydimethylsiloxane curing agent and ethyl acetate at a mass ratio of 10:1:20 for 15 minutes, then add 40% by mass of ZrO2 with a particle size of 550 nm and 5% by mass of SiO2, and continue stirring for 30 minutes to form a mixed solution containing PDMS, ZrO2, SiO2 and PDMS curing agent, spin-coat the mixed solution containing PDMS, ZrO2, SiO2 and PDMS curing agent onto the surface of the transparent reflective layer, and dry and solidify to obtain a transparent emission layer with a thickness of 65 μm; S4. Mix 20 μL of trichloro(1H,1H,2H,2H-perfluorooctyl)silane (PFOTS, VWR) with 10 mL of cyclohexane (VWR) and spray the mixture on the surface of the transparent emitting layer to prepare a hydrophobic layer, thereby obtaining a transparent radiation material.

[0048] Example 2 A method for preparing a transparent radiation material, the other contents are the same as those in Example 1, except that the transparent substrate layer is a nanoporous polyethylene film, and the preparation method of the transparent substrate layer is as follows: PE powder, paraffin and antioxidant 1010 are added to a round-bottom flask in a mass ratio of 2:98:0.01, and stirred at 150°C for 3 hours to form a uniform solution. The heated solution is pushed into a sheet mold to form a gel-like film and uniaxially stretched, and then the gel is extracted with cyclohexane multiple times and dried to obtain the obtained product.

[0049] Example 3 A method for preparing a transparent radiation material, the other contents are the same as those in Example 1, except that, S2. a first Ag layer with a thickness of 15 nm, a ZnO layer with a thickness of 75 nm, a second Ag layer with a thickness of 15 nm, and a SiO2 layer with a thickness of 75 nm are sequentially coated on the surface of a transparent base layer to obtain a transparent reflective layer with a thickness of 180 nm.

[0050] Comparative Example 1 A method for preparing a radiation material, the other contents are the same as those of Example 1, except that step S4 is not included.

[0051] Comparative Example 2 A method for preparing a radiation material, the other contents are the same as those of Example 1, except that step S2 is not included.

[0052] Testing and analysis The properties of the TRC films obtained in the examples and comparative examples were tested, and the specific contents are as follows: TRC film optical properties test: testing standard GB / T30127-2013.

[0053] TRC film static water contact angle test: Use a contact angle meter (JC2000C2E) to measure the contact angle of the sample. The water drop size used in the test is 3μL. The fitting method is polynomial fitting, and the calculation method is the tangent method. Five points are selected for each sample for measurement and the average value is taken.

[0054] Outdoor test of refrigeration performance of radiant cooling film: The refrigeration test device of the radiative cooling film is a foam board of 80cm×40cm×30cm. Three grooves with a diameter of 5cm and a depth of 1cm are set. K-type thermocouple sensors are placed in each groove to test the temperature of the three grooves. A four-channel temperature recorder (TA612C) is used to record the real-time temperature. The entire foam box is wrapped with tin foil to shield the surrounding radiation. In order to shield the influence of thermal convection, a layer of polyethylene film is covered on the top. The infrared image is taken by a portable thermal infrared camera (HIKVISION, H13, China).

[0055] The radiation materials obtained in Example 1 and Comparative Examples 1-2 were subjected to performance tests, and the PO film was used as a control.

[0056] Comparing the optical properties of the PO film and the radiation material of Example 1, the results are as follows Figure 1 As shown, Figure 1 a is the sunlight band, Figure 1 b is the mid-infrared band.

[0057] The cooling effect of the radiation material of Example 1 is tested. The schematic diagram of the test device is as follows: Figure 2 The temperature change curve is shown in a. Figure 2 As shown in b.

[0058] The contact angles of the radiation materials of Example 1 and Comparative Example 1 were tested, and the results were as follows: Figure 3 As shown, Figure 3 a is the test result of comparative example 1, Figure 3 b is the test result of Example 1.

[0059] The results of testing the chemical stability of the radiation material (TRC) film of Example 1 are as follows: Figure 4 As shown, the stress and strain of the radiation material (TRC) film of Example 1 were tested, and the results were as follows Figure 5 shown.

[0060] The radiation materials of Example 1 and Comparative Example 2 were respectively attached to automobile glass and exposed to sunlight for 4 hours from 11:00 to 15:00 in summer at a sunlight intensity of 900W / m2 and a humidity of 45%. The surface temperature was tested. The results are as follows: Figure 6 As shown, Figure 6 a is the test result of Example 1, Figure 6 b is the test result of comparative example 2.

[0061] Depend on Figure 1Analysis shows that the transmittance of traditional polyolefin (PO) films in the solar spectrum is close to 90%. Although it can fully transmit photosynthetically active radiation (PAR) that is crucial to plant photosynthesis, its high transmittance also covers the near-infrared (NIR) band, which may cause abnormal temperature rise inside the greenhouse in summer, causing adverse effects on the crop growth environment. In contrast, the high-efficiency radiative cooling (TRC) film of Example 1 of the present application has an average transmittance of about 66% in the PAR band, and an average reflectivity of 80% in the NIR band, showing excellent NIR selective reflection characteristics. In the mid-infrared band, the TRC film of the present application, through the strong radiation ability of the transparent polydimethylsiloxane (PDMS) base layer, makes the average emissivity of the entire atmospheric window as high as 94%, which not only effectively avoids excessive temperature inside the greenhouse, but also ensures sufficient photosynthetically active radiation required for crop growth, providing a more suitable growth environment for crops. It can be seen that the spectral characteristic design of the TRC film obtained in Example 1 of the present application, especially its selective reflection in the NIR band and high emissivity in the mid-infrared band, provides an innovative solution for temperature control in the greenhouse environment and optimization of crop photosynthesis, which is of great significance for promoting the healthy growth of crops.

[0062] Depend on Figure 2 It can be seen that compared with traditional polyolefin (PO) films, the transparent radiative cooling (TRC) film of Example 1 of the present application shows significant advantages in thermal management performance. Specifically, the excellent cooling effect exhibited by the TRC film under actual test conditions is not only reflected in the efficient reflection in the near-infrared (NIR) band, which effectively avoids the aggravation of the greenhouse effect, but also in its high emissivity in the mid-infrared band, which accelerates the radiative cooling of heat, thereby achieving effective regulation of the ambient temperature. Figure 2 It has been proven that TRC film can significantly improve the thermal comfort and energy efficiency of materials, and provide efficient and environmentally friendly temperature control solutions for greenhouses, buildings, vehicles and other application scenarios. Through the use of TRC film, the energy consumption of refrigeration equipment such as air conditioners can be effectively reduced, which is of great value in promoting energy conservation and environmental protection.

[0063] Depend on Figure 3 It can be seen that after the transparent radiative cooling (TRC) film of the present invention has undergone hydrophobic modification, its surface contact angle has been significantly improved, from the original 135° to 155°. The substantial increase in the contact angle is conducive to the TRC film's ability to repel water, which not only effectively improves the material's self-cleaning ability and reduces the adhesion of pollutants, but also enhances its durability and maintenance convenience under harsh environmental conditions. The realization of the super-hydrophobic surface of this application is achieved through surface modification technology, which changes the microstructure and chemical properties of the material, thereby achieving rapid sliding of water droplets on the film surface, ensuring the long-term cleanliness and transparency of the material surface.

[0064] Depend on Figure 4 It can be seen that after being continuously attacked by strong acid and strong base environments, the transparent radiative cooling (TRC) film of this application still shows excellent chemical stability. Specifically, its core radiative cooling performance has not shown significant attenuation, and is similar to the performance of the untreated original sample. This finding strongly proves the durability and reliability of the TRC film under extreme chemical conditions.

[0065] pass Figure 5 It can be seen that the transparent radiative cooling (TRC) film of the present application has high mechanical strength, can withstand external forces without being easily damaged, has good flexibility, and can maintain its structural integrity and functional stability even under bending or stretching conditions.

[0066] Depend on Figure 6 It can be seen that the transparent radiation cooling (TRC) film of the present application is attached to the surface of the automobile glass, and under the same conditions, that is, from 11:00 to 15:00 in summer, the sunlight intensity is 900W / square meter, and the ambient humidity is 45%, and the conventional film material is attached to the automobile glass for comparative testing. After 4 hours of direct exposure, the surface temperature of the TRC film is stabilized at 35.7°C, while the surface temperature of comparative example 2 rises to 41.3°C. It shows that the TRC film of the present application can effectively reduce the surface temperature in a high temperature and high radiation environment, achieving a significant cooling effect.

[0067] Compared with the prior art, the present invention has the following advantages: 1. It has both radiation cooling and super hydrophobic properties to meet the needs of energy saving and environmental protection; 2. High transparency, no impact on lighting; 3. The preparation process is simple and easy to achieve large-scale production.

[0068] 4. It has excellent self-cleaning performance and stable outdoor performance.

[0069] 5. Has excellent flexibility.

[0070] In summary, the material of the present invention is widely used in scenes such as building exterior windows, solar panels, and vehicle glass due to its unique radiative cooling and super-hydrophobic properties. It can not only significantly reduce air-conditioning energy consumption and improve energy efficiency, but also its self-cleaning ability can reduce maintenance costs and extend service life.

[0071] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A transparent radiation material, characterized in that: It includes a transparent base layer, a transparent reflective layer, a transparent emission layer, and a hydrophobic layer stacked in sequence; the transparent reflective layer includes a first Ag layer, a ZnO layer, a second Ag layer, and a SiO2 layer stacked in sequence, and the first Ag layer is bonded to the transparent base layer; the transparent emission layer is a PDMS / ZrO2 / SiO2 composite layer.

2. The transparent radiation material according to claim 1, characterized in that: The transparent substrate layer comprises one or more of a polyolefin elastomer film and a nanoporous polyethylene film, and the thickness of the transparent substrate layer is 5-80 μm.

3. The transparent radiation material according to claim 1, characterized in that: The particle sizes of the Ag particles in the first Ag layer and the second Ag layer are both 10-20 nm, and the particle size of the ZnO particles in the ZnO layer is 10-75 nm.

4. The transparent radiation material according to claim 1, characterized in that: The thickness of the transparent reflective layer is 170-180 nm, the thickness of the first Ag layer and the second Ag layer of the transparent reflective layer are both 10-20 nm, and the thickness ratio of the ZnO layer to the SiO2 layer is 1:1-1.

2.

5. The transparent radiation material according to claim 1, characterized in that: The thickness of the transparent emission layer is 30-100 μm.

6. The transparent radiation material according to claim 1, characterized in that: In the transparent emission layer, the ZrO2 particle size is 50-1000nm.

7. The transparent radiation material according to claim 1, characterized in that: The hydrophobic layer includes a mixture of trichloro(1H,1H,2H,2H-perfluorooctyl)silane and cyclohexane.

8. A method for preparing a transparent radiation material according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Obtain a transparent basal layer; S2. A first Ag layer, a ZnO layer, a second Ag layer, and a SiO2 layer are sequentially coated or deposited on the surface of the transparent substrate layer to obtain a transparent reflective layer; S3. A mixed solution containing PDMS, ZrO2, SiO2 and a PDMS curing agent is coated on the transparent reflective layer to obtain a transparent emission layer; S4. A mixed solution of trichloro(1H,1H,2H,2H-perfluorooctyl)silane and cyclohexane is coated on the surface of the transparent emitting layer to prepare a hydrophobic layer, thereby obtaining the transparent radiation material.

9. The method for preparing a transparent radiation material according to claim 8, characterized in that: The mass ratio of the PDMS:ZrO2:SiO2 is 100:40:1-20.

10. Use of the transparent radiation material according to any one of claims 1 to 7 in the automotive field.

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