CN114801403A - Radiation refrigeration composite flexible membrane with structural color - Google Patents

Radiation refrigeration composite flexible membrane with structural color Download PDF

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CN114801403A
CN114801403A CN202210220105.2A CN202210220105A CN114801403A CN 114801403 A CN114801403 A CN 114801403A CN 202210220105 A CN202210220105 A CN 202210220105A CN 114801403 A CN114801403 A CN 114801403A
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radiation
structural color
color
composite flexible
flexible film
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CN114801403B (en
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汪万林
严潇远
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Shenzhen University
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Shenzhen University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/28—Multiple coating on one surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties

Abstract

The invention discloses a radiation refrigeration composite flexible film with structural color, and relates to the technical field of radiation refrigeration. The invention provides a radiation refrigeration composite flexible film with structural colors, which sequentially comprises the following structures from top to bottom: the structural color multilayer film, the substrate layer and the reflecting layer; one surface of the substrate layer, which is attached to the reflecting layer, is a frosted surface; the invention achieves the effects of presenting required colors and having no absorption in visible light wave bands through the structural design, and improves the radiation refrigeration efficiency. The invention solves the problem of single color of the conventional radiation refrigerator, realizes structural color by transmitting or reflecting visible light with different wavelengths instead of selective absorption, solves the problem of solar energy absorption of the conventional structural color radiation refrigerator in a visible light waveband, realizes colored radiation refrigeration without absorption in a solar waveband, and can be applied to more practical scenes because a flexible substrate is adopted and other parts have no rigid structures.

Description

Radiation refrigeration composite flexible membrane with structural color
Technical Field
The invention relates to the technical field of structural color radiation refrigeration, in particular to a radiation refrigeration composite flexible film with structural color.
Background
Due to the progress of human civilization and the rapid development of modern economic society, the consumption and demand of human beings on energy sources are increasingly increased, and the world is already in energy crisis. Meanwhile, the demand for cooling has also increased in synchronization with the increasing climate problems such as greenhouse effect due to the excessive emission of greenhouse gases such as carbon dioxide. Active refrigeration equipment such as an air conditioner and a water cooling device consumes energy and releases certain heat in the process of transferring heat, so that an energy consumption and refrigeration dead cycle is involved. Therefore, a new refrigeration method without energy consumption is urgently needed to solve the problem.
Radiation refrigeration is a passive refrigeration technology which realizes radiation heat transfer between an object and a low-temperature space and an external environment by covering the surface of the object with an infrared band high-emissivity structure passing through atmospheric windows (3-5 um and 8-13 um), thereby cooling the object. Radiation refrigeration has attracted extensive attention in the field of energy-saving application as a passive, effective and reproducible way of reducing refrigeration energy consumption. However, the early radiation refrigeration can only be used at night because the solar heating power can easily compensate the refrigeration power in the daytime, and the day radiation refrigeration technology has not made a major breakthrough until the last decade due to the improvements of thermal photon design and micro-nano structure processing technology. Related art researchers have proposed many methods for daytime radiative cooling, including photonic design, particle-based matrices, composites, textiles, and the like. Typically, these structures, films or coatings for radiation cooling are mounted on the outside of the object to achieve better radiation heat transfer and higher cooling efficiency. However, daytime radiation refrigerators always appear white or silver in order to minimize the heating power in the solar band (0.3-2.5 μm). But the white color can not exist monotonously for aesthetic reasons when the colored radiation refrigerating film is applied to the fields of buildings, clothes and the like, so that the colored radiation refrigerating film has larger requirements and wider application.
In order to achieve colored radiation refrigeration, researchers have proposed basically two solutions in recent years. The first is dye rendering, i.e., the direct bonding of an absorptive dye to the surface of a conventional radiation cooler. Although this can be applied to flexible materials such as architectural coatings and fabrics, the additional dye layer absorbs not only the radiation energy in the visible band due to color display but also part of the radiation energy in the infrared band, which greatly impairs the refrigeration performance. The second is realized by using structural color, namely, the reflectivity of the traditional refrigerator corresponding to the color wavelength in the visible light wave band is changed through structural design. Compared with dye rendering, the use of structural colors can avoid absorbing additional energy in the infrared band, thereby achieving better cooling performance.
Disclosure of Invention
The technical problem to be solved by the invention is that the existing structural color radiation refrigeration technology only solves the absorption in the infrared band, but in order to obtain the required color, partial absorption still exists in the visible light band, and a small heat absorption still exists under the strong sunlight irradiation, so that the radiation refrigeration efficiency still has a non-negligible influence.
In order to solve the above problems, the present invention proposes the following technical solutions:
a radiation refrigeration composite flexible membrane with structural color sequentially comprises the following structures from top to bottom: the structural color multilayer film, the substrate layer and the reflecting layer;
the structural color multilayer film has a transmittance of more than 0.8 for a light band of a preset color, and has a reflectance of more than 0.94 except for the light band of the preset color;
the base layer does not absorb visible light wave bands and can radiate and refrigerate in atmospheric window wave bands;
one surface of the base layer, which is attached to the reflecting layer, is a frosted surface; the angle of the light scattered by the frosted surface can at least reach +/-60 degrees of the incident light;
the reflecting layer has a reflectivity of 0.94 or more in both visible light and infrared light bands.
It can be understood that the substrate layer is used as a substrate of the structural color multilayer film, and is required to not cause absorption in the visible light band and to play a role in radiation refrigeration in the atmospheric window band, and meanwhile, certain flexibility is required to ensure the flexibility of the whole structure, so that the optimal substrate layer is made of a flexible material transparent in the visible light band.
Further, the material of the substrate layer is selected from a high-molecular polymer film with a high refractive index, such as PMMA, PDMS, PVC and/or PP.
In the invention, the frosted surface plays a role of diffusing and scattering incident light, and the angle of the scattered light can reach at least +/-60 degrees of normal incident light. The frosting degree of the frosting surface is 100-500 meshes, and the frosting degree of the frosting surface is preferably 200-400 meshes. One embodiment of the invention adopts the frosting degree of W40(320 meshes) with better actual effect.
Furthermore, the reflecting layer plays a role in reflecting and emitting visible light of the structural color multilayer film, and is required to have a better reflectivity in a visible-infrared band, and in order to ensure the reflectivity, the thickness of the reflecting layer is 30-200 nm.
Furthermore, the material of the reflecting layer is selected from Ag and Al.
In the invention, the structural color multilayer film plays a role in distinguishing different colors, the preset color is the color presented by the composite flexible film, namely the structural color multilayer film is required to have the transmissivity close to 1.0 in the wave band of the required color (the blue wave band is used as an illustration in one embodiment of the invention, 400nm-550nm), and the lowest position is also required to be more than 0.6, so that the obtained color has high saturation; meanwhile, the wave bands of other colors are required to have the reflectivity close to 1.0 so as to ensure the hue purity of the obtained color; and no requirement is made for other bands than visible light.
Furthermore, the structural color multilayer film adopts two or more dielectric materials with different refractive indexes to form a one-dimensional photonic crystal structure alternately.
Further, the dielectric material is selected from TiO 2 、SiO 2 、Al 2 O 3 、BaF 2 、ITO。
Further, the light band of the preset color is within the visible light band.
Further, the thickness of the base layer is 50-200um, preferably 80-150 um.
Compared with the prior art, the invention can achieve the following technical effects:
the radiation refrigeration composite flexible film with the structural color provided by the invention can achieve the effects of presenting the required color and having no absorption in a visible light wave band through the structural design, and improves the radiation refrigeration efficiency. The invention solves the problem of single color of the conventional radiation refrigerator, realizes structural color by transmitting or reflecting visible light with different wavelengths instead of selective absorption, solves the problem of solar energy absorption of the conventional structural color radiation refrigerator in a visible light waveband, realizes colored radiation refrigeration without absorption in a solar waveband, and can be applied to more practical scenes because a flexible substrate is adopted and other parts have no rigid structures.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a radiation-cooled composite flexible membrane having a structural color according to the present invention;
FIG. 2 is a graph showing the reflectance, transmittance and absorbance spectra of a radiation-cooled composite flexible film having structural colors according to an embodiment of the present invention;
fig. 3 is a test spectrum of a visible light waveband angle-resolved spectrometer of the radiation refrigeration composite flexible film with the blue structural color according to an embodiment of the present invention;
FIG. 4 is a comparative sunshine experimental result of a radiation refrigeration composite flexible film and architectural coating with blue structural color and a conventional radiation refrigeration structure provided by an embodiment of the present invention;
fig. 5 is a color coordinate of an image color of different angles of the radiation refrigeration composite flexible film with a blue structural color in a chromaticity diagram according to an embodiment of the invention.
Detailed Description
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. It is apparent that the embodiments to be described below are only a part of the embodiments of the present invention, and not all of them. 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.
The embodiment of the invention provides a radiation refrigeration composite flexible film with structural color, which sequentially comprises the following structures from top to bottom: the structural color multilayer film, a substrate layer and a reflecting layer. The structural color multilayer film has a transmittance of more than 0.8 for a light band of a preset color, and has a reflectance of more than 0.94 except for the light band of the preset color; the base layer does not absorb visible light wave bands and can radiate and refrigerate in atmospheric window wave bands; one surface of the base layer, which is attached to the reflecting layer, is a frosted surface; the angle of the light scattered by the frosted surface can at least reach +/-60 degrees of the incident light; the reflecting layer has a reflectivity of 0.94 or more in both visible light and infrared light bands.
It is understood that, in the present invention, the closer the reflectivity of the reflective layer is to 1.0, the more complete reflection and no light absorption effect can be achieved.
The present embodiment is described with the predetermined color of the structural color multilayer film being blue. As shown in fig. 1, when sunlight rays (see 0 in the figure) pass through the multilayer film, the blue light is coherently transmitted (see 2 in the figure), and the rest part of the light presents yellow light and is directly reflected by a mirror surface (see 1 in the figure); the incident blue light is not absorbed, but returns to the outside through the scattering effect of the frosted surface and the reflection effect of the reflection layer to achieve the effect of diffuse reflection (see fig. 4); in this process, the light ray 0 finally achieves total reflection (see fig. 3), i.e. without any absorption in the structure. And the white light is dispersed into lights with different colors through a series of transmission and reflection effects, and the structural color is presented through the diffuse reflection effect.
It can be understood that the substrate layer is used as a substrate of the structural color multilayer film, and is required to not cause absorption in the visible light band and to play a role in radiation refrigeration in the atmospheric window band, and meanwhile, certain flexibility is required to ensure the flexibility of the whole structure, so that the optimal substrate layer is made of a flexible material transparent in the visible light band.
In this embodiment, the material of the substrate layer is selected from a transparent high polymer film PDMS with high refractive index and good flexibility.
In this embodiment, the frosted surface plays a role of diffusely scattering the incident light, and the angle of the scattered light can reach at least ± 60 ° of the normal incident light. The frosting degree of the frosting surface is 100-500 meshes, and the frosting degree of the frosting surface is preferably 200-400 meshes. The present embodiment adopts a W40(320 mesh) sanding degree with a good practical effect.
In this embodiment, the reflective layer plays a role in reflecting incident visible light of the structural color multilayer film, and is required to have a good reflectivity in the visible-infrared band, and in order to ensure the reflectivity, the thickness of the reflective layer is 100 nm. The material of the reflecting layer is selected from Ag.
In the invention, the structural color multilayer film plays a role in distinguishing different colors, the preset color is the color presented by the composite flexible film, namely the structural color multilayer film is required to have a transmittance close to 1.0 in a wavelength band (a blue wavelength band is used for illustration in the embodiment, 400nm-550nm) of a required color, and the lowest position is also required to be more than 0.8, so that the obtained color has high saturation; meanwhile, the wave bands of other colors are required to have the reflectivity close to 1.0 so as to ensure the hue purity of the obtained color; and no requirement is made for other bands than visible light.
Referring further to fig. 2, the structure of the structured color multilayer film of the present exampleIs 11 layers of overlapped TiO 2 And SiO 2 The thickness of each layer is limited to between 50-110 nm. More specifically, in this embodiment, the thickness of each layer is, in order from top to bottom:
68nm,96nm,64nm,88nm,56nm,103nm,57nm,93nm,61nm,109nm and 59 nm.
As can be seen from fig. 2, in the present embodiment, the high transmittance of the composite flexible film at 400-550nm allows the blue light in the white light to transmit and reflect the other light, which is the reason for the blue light to transmit and reflect the yellow light at the light primary level, and the comparison with the standard blue spectrum also shows that the composite flexible film can exhibit a high saturation blue color. Wherein the absorptivity of the composite flexible membrane is nearly 0, and no heat absorption is generated.
It should be noted that the present invention is described with emphasis on the designed blue multilayer film, and other color lights can be realized by adjusting the material, the number of layers, and the thickness of the multilayer film.
In order to ensure the flexibility of the radiation refrigeration composite flexible film, the base layer is not too thick, preferably 50-200um, more preferably 80-150um, and the thickness of the base layer in this embodiment is 100 um.
The structural color multilayer film can be plated on the substrate layer by adopting the existing process, and the invention is not limited to this.
With further reference to fig. 3, the composite flexible film of the present embodiment can observe high saturation blue within ± 60 °, which can meet most requirements of actual use scenarios.
FIG. 4 is a comparative insolation experiment of the composite flexible film and architectural coating described in this example and a conventional radiant cooling structure. Wherein the time of day is recorded at about nine am to four pm, and a solar radiation power curve for the day is attached. The maximum temperature difference between the multilayer film radiation refrigeration composite structure and the building coating can reach 25 ℃ and is lower than the air temperature by about 3 ℃, and the result of figure 4 shows that the radiation refrigeration composite flexible film with the structural color provided by the invention has the performance of not absorbing heat and higher refrigeration efficiency; compared with the traditional radiation refrigeration structure using high-molecular polymer PDMS, the radiation refrigeration composite flexible film with the structural color provided by the invention can show a color with higher saturation, and can be applied to more practical scenes.
Fig. 5 is a color coordinate of the color of the image of the radiation refrigeration composite flexible film with the blue structural color at different angles in the chromaticity diagram. Wherein, with the increasing observation angle, the composite flexible film shows the deviation from blue to purple, which is the defect of structural color compared with the conventional pigment color.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The radiation refrigeration composite flexible film with structural color is characterized in that the structure from top to bottom is as follows: the structural color multilayer film, the substrate layer and the reflecting layer;
the structural color multilayer film has a transmittance of more than 0.8 for a light band of a preset color, and has a reflectance of more than 0.94 except for the light band of the preset color;
the base layer does not absorb visible light wave bands and can radiate and refrigerate in atmospheric window wave bands;
one surface of the base layer, which is attached to the reflecting layer, is a frosted surface; the angle of the light scattered by the frosted surface can at least reach +/-60 degrees of the incident light;
the reflecting layer has a reflectivity of 0.94 or more in both visible light and infrared light bands.
2. The radiation-cooled composite flexible film with structural color as claimed in claim 1, wherein said substrate layer is a transparent flexible material.
3. The radiation-cooled composite flexible film with structural color as claimed in claim 1, wherein the material of the substrate layer is selected from PMMA, PDMS, PVC and/or PP.
4. The radiation-cooled composite flexible film with structural color as claimed in claim 1, wherein the frosted surface has a frosting degree of 100-500 mesh.
5. The radiation-cooled composite flexible film having a structured color according to claim 1, wherein the reflective layer has a thickness of 30 to 200 nm.
6. The radiation-cooled composite flexible film with structural color as claimed in claim 5, wherein the material of the reflective layer is selected from Ag and Al.
7. The radiation-cooled composite flexible film with structural color as claimed in claim 1, wherein the structural color multilayer film adopts a structure that two or more dielectric materials with different refractive indexes are alternated to form one-dimensional photonic crystals.
8. The radiation-cooled composite flexible film with structural color of claim 7, wherein the dielectric material is selected from the group consisting of TiO 2 、SiO 2 、Al 2 O 3 、BaF 2 、ITO。
9. The radiation-cooled composite flexible film with structured colors according to claim 1, wherein the light band of the predetermined color is in the visible light band.
10. A radiation-cooled composite flexible film having a structural color as claimed in claim 1, wherein the substrate layer has a thickness of 50-200 um.
CN202210220105.2A 2022-03-08 2022-03-08 Radiation refrigeration composite flexible membrane with structural color Active CN114801403B (en)

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CN109084610A (en) * 2018-07-18 2018-12-25 华中科技大学 It is a kind of for the transparent flexible thin-film material of radiation refrigeration on daytime and application
CN108710169A (en) * 2018-08-03 2018-10-26 浙江大学 Radiation refrigeration optical filter and its preparation method and application
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116768491A (en) * 2023-06-19 2023-09-19 深圳大学 High saturation high brightness large vision color refrigeration film
CN116768491B (en) * 2023-06-19 2024-04-09 深圳大学 High saturation high brightness large vision color refrigeration film

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Inventor after: Wang Guoping

Inventor after: Wang Wanlin

Inventor after: Yan Xiaoyuan

Inventor before: Wang Wanlin

Inventor before: Yan Xiaoyuan