61 results about "Solar reflectance" patented technology

The invention relates to the technical field of radiation refrigeration films, and discloses a porous polyvinylidene fluoride based composite radiation refrigeration film and a preparation method thereof. The method comprises the following steps: firstly, carrying out melt blending on PVDF, NaCl and ZnO nanoparticles and forming a film, then dissolving out NaCl through water washing, and constructing a continuous three-dimensional porous structure in a PVDF matrix; and immersing the obtained porous PVDF / ZnO membrane material into a methanol aqueous solution containing 2-methylimidazole, so that ZnO is subjected to a coordination reaction at the pore wall and is converted into the ZIF-8 nanocrystal in situ. In the thin film prepared by the steps, the micron-sized salt-induced pore structure, the nano-sized ZIF-8 particles and the interface of the ZIF-8 particles jointly form a multi-stage scattering network, so that the scattering ability of the thin film in the solar spectrum range of 0.25-2.5 microns can be remarkably enhanced, the high infrared emission performance of the PVDF matrix in an atmospheric window of 8-13 microns is maintained, and the thin film has high solar reflectivity and high infrared emissivity, and can be used for preparing the solar film. An excellent radiation refrigeration effect can be achieved, and the heat-dissipating material is suitable for being applied to building outer surfaces, equipment heat dissipation, individual heat management and the like.

The invention discloses a ternary ceramic aerogel with radiation refrigeration and heat insulation functions and a preparation method and application thereof.The ternary ceramic aerogel has the radiation refrigeration and heat insulation functions, has the extremely high solar reflectivity (98%) and infrared emissivity (98.4%), can achieve efficient daytime radiation cooling, has the extremely low heat conductivity coefficient (24.7 mW m <-1 > K <-1 >), and has the advantages of being high in heat conductivity coefficient (24.7 mW m <-1 > K <-1 >) and good in heat conductivity coefficient (24.7 mW m <-1 > K <-1 >). The material can provide an all-day thermal insulation effect, has excellent tensile strength, compression strength and bending strength, has no modulus attenuation after tens of thousands of cycles, can maintain cyclic compression strain in a temperature range of-198 DEG C to 1200 DEG C, has no mechanical strength loss, and has the characteristics of high temperature resistance and high mechanical strength; the system is suitable for meeting the temperature adjusting requirements of different scenes and harsh environments, and can be widely applied to the fields of buildings, vehicles or aerospace and the like.

The invention relates to the technical field of coatings, and discloses a heat-insulating powder coating as well as a preparation method and application thereof. The heat insulation powder coating is prepared from the following preparation raw materials in parts by mass: 160 to 220 parts of organic silicon modified polyester resin, 10 to 30 parts of modified hollow glass beads, 30 to 70 parts of modified sericite powder, 40 to 60 parts of titanium dioxide, 3 to 5 parts of hydrophobic SiO2 aerogel and 10 to 20 parts of curing agent, wherein the organic silicon modified polyester resin is prepared by melting and blending weather-proof polyester resin and organic silicon resin according to the mass ratio of (4-9): 1; the temperature of melt blending is 90 to 130 DEG C. According to the coating, the excellent heat insulation performance that the solar reflectance is larger than or equal to 0.87 and the heat conductivity coefficient is smaller than or equal to 0.075 W / m.K is achieved, the excellent mechanical strength, adhesive force, impact resistance and long-acting weather resistance are achieved, and heat loads on the surfaces of building outer walls, industrial furnace shells, household appliances and the like can be remarkably reduced.

The invention discloses a passive radiation-cold storage composite box body and a preparation method. The box body sequentially comprises a composite radiation film, a heat insulation layer and a cold storage layer from outside to inside. The outer-layer radiation film is composed of an elastic organic matrix and high-reflection inorganic particles such as barium sulfate, has high solar reflectivity and mid-infrared high emissivity, and can effectively restrain solar absorption and achieve radiation heat dissipation in the daytime. The heat insulation layer is made of XPS, EPS, aerogel felt and other low-heat-conduction materials so as to reduce external heat transfer. Phase change microcapsules are dispersed in the cold storage layer, and flake graphite and other high-thermal-conductivity fillers can be added to improve the cold transfer efficiency and temperature uniformity. And the phase-change material realizes automatic cold storage and cold release through a latent heat mechanism, so that the temperature in the box body is kept stable. Through the synergistic effect of radiation refrigeration, heat insulation and phase change cold storage, long-time and recyclable passive cold chain temperature control is achieved, and the device has the advantages of being simple and convenient in structure, high in cost performance, flexible in application, uniform in internal temperature distribution and the like.

The invention discloses a phase-change radiation refrigeration coating which is prepared by the following steps: dispersing nano aluminum oxide particles in phase-change paraffin in advance to form a high-thermal-conductivity and high-radiation composite phase-change material, and encapsulating the high-thermal-conductivity and high-radiation composite phase-change material in a porous ceramic skeleton through vacuum infusion to obtain composite phase-change ceramic particles; then, the composite phase-change ceramic particles are dispersed in polyol resin containing aluminum oxide microspheres, the aluminum oxide microspheres accurately block pores in the surface of the porous ceramic through particle size matching, paraffin leakage is prevented, and the aluminum oxide microspheres serve as heat conduction channels and radiation units at the same time, so that it is guaranteed that the finally prepared coating integrates phase-change temperature control, efficient heat conduction and radiation refrigeration; the high sunlight reflectivity (94%-98%) and the high atmospheric window infrared emissivity (92%-96%) are achieved, and the thermal response rate and the leakproof performance are remarkably improved.

A colored bilayer sub-ambient radiative cooling coating designed to enhance solar reflectance and aesthetic coloration is introduced. The coating includes a white bottom layer containing TiO2 or ZrO2 nanoparticles, and hollow glass spheres dispersed in a polymer matrix, and a colored top layer containing SiO2 microspheres and fluorescent pigments selected from Sr2Si5N8:Eu2+, Y3A15O12:Ce3+, (Ba,Sr)SiO4:Eu2+, or SrO·Al2O3:Eu phosphors dispersed in a polymer matrix. This bilayer structure achieves an effective solar reflectance of at least 90% and reduces surface temperature by at least 3° C. compared to ambient air, providing energy-efficient cooling with aesthetic appeal.

This invention discloses a self-cleaning radiative cooling coating based on biomass carbon quantum dots, its preparation method, and its application. The coating comprises a polymer film-forming resin, carbon quantum dots, and hollow glass microspheres; wherein the mass ratio of the polymer film-forming resin to the filler is 1:(0.1-0.5), and the mass ratio of the hollow glass microspheres to the carbon quantum dots is 1:(0.05-0.2). This invention synergistically enhances solar reflectivity through the photoluminescence properties of carbon quantum dots and the scattering properties of hollow glass microspheres, while simultaneously utilizing the synergistic effect of fluorinated resin and modified hollow glass microspheres to endow the coating with superhydrophobic self-cleaning function. A single layer of this coating can achieve a solar reflectivity >92%, mid-infrared emissivity >94%, and contact angle >150°, possessing both efficient daytime radiative cooling and long-lasting self-cleaning performance. It is particularly suitable for passive heat dissipation of outdoor equipment such as new energy vehicle charging piles, and features simple process, environmental friendliness, and excellent performance.

The invention discloses a solid waste-based micro-nano radiation cooling coating and a preparation method thereof.The preparation method comprises the steps that fly ash and coal gangue serve as main solid waste raw materials, and after being subjected to ultra-fining and silane modification, the main solid waste raw materials and a phosphate exciting agent are subjected to chemical action to form an inorganic micro-nano gel matrix; nano-silica (SiO2) and barium sulfate (BaSO4) are cooperatively introduced as a spectrum regulation functional filler, and a multi-scale scattering structure and an intermediate infrared radiation channel are constructed, so that the radiation cooling effect of high solar reflectivity and high infrared emissivity is realized. The prepared coating has excellent spectral selectivity (the solar reflectivity is larger than or equal to 0.88, and the mid-infrared emissivity is larger than or equal to 0.95), high weather resistance (the 500-hour ultraviolet aging retention rate is larger than or equal to 95%) and remarkable passive cooling capacity (the temperature drop can reach 5-8 DEG C). The raw materials are wide in source, the preparation process is simple, a large amount of building solid waste or industrial solid waste can be utilized, the low-cost and high-performance green radiation cooling coating is achieved, and a technical path capable of being popularized on a large scale is provided for building outer wall energy-saving transformation and urban heat island relieving.

The invention provides a water-based radiation refrigeration coating and a preparation method thereof, and belongs to the technical field of refrigeration coatings. The water-based radiation refrigeration coating comprises the following components: 25%-40% of a water-based emulsion, 10%-20% of polymethyl methacrylate powder, 10%-20% of functional filler, 0.1%-0.5% of a pH regulator, 0.1%-1.0% of a flatting agent, 0.1%-0.7% of a defoaming agent, 0.5%-1.8% of a thickening agent, 0.1%-0.5% of a dispersing agent, 0.1%-1.5% of a coalescing agent and the balance of deionized water. The water-based radiation refrigeration coating provided by the invention has high solar reflectivity (Rgt, 95%) and high infrared emissivity (ATSWgt, 95%), can effectively reflect and block sunlight, reduces the temperature of an external wall of a building through radiation heat dissipation and reduces the energy consumption of refrigeration equipment, and has important significance on energy conservation and environmental protection.

To provide an exterior laminate that can be used as an exterior component and is capable of sufficiently suppressing heat accumulation due to radiant heat such as sunlight. [Solution] An exterior laminate 10 is disclosed, having, in order from the surface side, a) a transparent film layer 1 containing an acrylic resin and b) a colored film layer 3 containing a polyvinyl chloride resin, wherein the colored film layer 3 of b) contains 1% by mass or more of titanium oxide particles relative to the total mass of the layer, and the solar reflectance of the colored film layer 3 of b) is 30% or more. The exterior laminate may have, in order from the surface side, a) a transparent film layer 1 containing an acrylic resin, c) a printed layer 2, and b) a colored film layer 3 containing a polyvinyl chloride resin. Preferably, the printed layer 2 of c) does not contain carbon black.

The invention relates to the field of membrane materials, and discloses a non-electric refrigeration coiled material and a preparation process thereof, and the non-electric refrigeration coiled material sequentially comprises an anti-ultraviolet layer, an intermediate infrared radiation layer, a porous reflection layer, a secondary reflection layer, a back adhesive layer and a release layer. When the non-electric refrigeration coiled material is prepared, the porous reflecting layer is subjected to hot-melt extrusion and stretched into film thickness, one side of the porous reflecting layer is sequentially coated with the intermediate infrared radiation layer and the ultraviolet layer, the other side of the porous reflecting layer is sequentially coated with the secondary reflecting layer, the back adhesive layer and the release layer, and the non-electric refrigeration coiled material is obtained after drying. The non-electric refrigeration coiled material prepared by the invention has a high reflection ratio to sunlight, obviously reflects the sunlight and reduces the indoor temperature; the radiation rate in the middle infrared band is high, indoor heat can be dissipated to the outer space in a radiation mode, the urban heat island effect is weakened, and meanwhile the service life is long. The problems that an existing cooling material is low in sunlight reflectivity, low in mid-infrared radiance and short in service life are solved, and the cooling material can be widely applied to building surfaces.

The invention provides a preparation method of a polymer-based radiation refrigeration material with a porous particle nested structure, and belongs to the technical field of radiation cooling energy-saving structural materials. The preparation method comprises the following steps: preparing a pre-emulsion from the polymer matrix, the diluent and the emulsifier; the polymer matrix is water-insoluble polymer polydimethylsiloxane and the like; preparing dispersion liquid from nano particles and water; adding the dispersion liquid into the pre-emulsion, and violently stirring to obtain a water-in-oil emulsion; and obtaining the polymer-based radiation refrigeration material by an emulsion template method. The internal structure of the material is composed of three photon scattering interfaces with refractive index gradients, including air / polymers, nanoparticles / polymers and air / nanoparticles, and the solar reflectivity greater than 93.0% and the atmospheric window emissivity greater than 96.0% are achieved. According to the material, the temperature is reduced by 5.0 DEG C at the lowest environment temperature in the daytime, and the maximum radiation cooling power can reach 61.0 W / m < 2 >; the temperature is reduced by 16.0 DEG C at night compared with the lowest environment temperature, and the maximum radiation cooling power can reach 105.5 / W m < 2 >.

To provide an exterior laminate that can be used as an exterior component and is capable of sufficiently suppressing heat accumulation due to radiant heat such as sunlight. [Solution] An exterior laminate 10 is disclosed, having, in order from the surface side, a) a transparent film layer 1 containing an acrylic resin, b) a colored film layer 3 containing a polyvinyl chloride resin, and d) a base material 4, wherein the solar transmittance of b) the colored film layer 3 is 20% or more, and the solar reflectance of d) the base material 4 is 40% or more. The exterior laminate 10 may have, in order from the surface side, a) a transparent film layer 1 containing an acrylic resin, c) a printed layer 2, b) a colored film layer 3 containing a polyvinyl chloride resin, and d) a base material 4. It is preferable that c) the printed layer 2 does not contain carbon black.

The application discloses a multilayer phase change all-year energy-saving material and a preparation method thereof. The material comprises, from inside to outside, a carbonized substrate layer, a radiation energy collecting layer and a phase change radiation switch layer. The carbonized substrate layer is made of carbonized material slurry. The raw materials of the phase change radiation switch layer comprise modified nano vanadium dioxide 0.5-25 parts, a polymer substrate 20-60 parts, acetone 130-200 parts and zirconium dioxide 0.2-15 parts in terms of mass fraction. In the multilayer phase change all-year energy-saving material, the phase change radiation switch realizes the switch change of transmission and reflection at different temperatures through the spectrum change of the phase change material. The material has good radiation refrigeration function in summer, has solar reflectivity of more than 90% and atmospheric window emissivity, has solar transmittance of more than 70% in winter, absorbs solar heat through the radiation energy collecting layer to realize building heat absorption, and realizes all-year energy saving.

The invention belongs to the technical field of polymer composite materials, and relates to aerogel for radiation refrigeration, which takes biomass cellulose as a framework and is loaded with a functional layer formed by SiO2 sol derived from wollastonite and calcium phytate. Wherein the SiO2 microspheres form a radiation refrigeration layer, so that the material is endowed with high solar reflectivity (greater than or equal to 95.1%) and high infrared emissivity (greater than or equal to 91.2%); calcium phytate formed by coordination of phytic acid and calcium ions in wollastonite forms a flame-retardant layer, so that the material has rapid self-extinguishing capability. The preparation method comprises the following steps: carrying out acid treatment on wollastonite, and preparing silica sol by a sol-gel method; the radiation refrigeration layer is constructed by loading the radiation refrigeration layer on the cellulose aerogel; and then treatment is carried out through a phytic acid solution, so that calcium resource fixation and flame-retardant layer construction are synchronously realized. All-element high-value utilization of silicon and calcium components of wollastonite is achieved, the problem of waste liquid in a traditional process is solved, and the obtained aerogel integrates efficient radiation refrigeration, active flame retardance, greenness and low cost and has wide application prospects in the field of building energy conservation.

The invention provides a thermal radiation refrigeration photon fiber fabric, a preparation method thereof and a wet spinning device, and belongs to the technical field of functional textile materials and radiation refrigeration. The method comprises the following steps: mixing two or more polymers which have obvious difference in dissolution behavior and viscosity in a solvent to form a spinning solution of which one phase is fully dissolved and the other phase is not completely dissolved; through a high-shear spinning device with a convergence-divergence microstructure runner and a multi-stage conical spinning assembly, a spinning stock solution is subjected to a high-shear effect in the extrusion process, remarkable velocity gradient and shear stress are generated between two phases with large viscosity difference, and a low-viscosity and incompletely-dissolved polymer phase is fibrillated and oriented; the fully dissolved polymer phase is rapidly solidified after entering a coagulating bath, a photon scattering cavity which spreads all over the fiber matrix is formed due to a phase separation effect, and finally the photon fiber with a multi-stage scattering cavity and directional microfiber synergistic structure is prepared. According to the structure, no micro-nano functional filler needs to be added, the solar reflectivity as high as 95.6% and the mid-infrared emissivity as high as 96.1% can be achieved at the same time, and an outdoor test shows that the temperature under coverage is reduced by 11.8 DEG C compared with that of a cotton fabric.

The invention provides a radiation refrigeration coating based on reactive polyurethane and a preparation method thereof. The radiation refrigeration coating based on reactive polyurethane is prepared from the following components in percentage by weight: 10 to 30 percent of silicon dioxide filler, 30 to 60 percent of macromolecular polyol, 20 to 40 percent of isocyanate, 1 to 10 percent of chain extender and 0.1 to 0.5 percent of catalyst, wherein the silicon dioxide filler is composed of at least two kinds of hollow silicon dioxide with different particle sizes. Through the gradation effect of the multi-particle-size filler, the technical problems of high viscosity and poor dispersity of a system under high filler filling are solved, the coating has high sunlight reflectivity, high infrared emissivity and excellent processing performance, the cooling effect obviously lower than the environment temperature can be achieved in the natural environment, the process is simple, and the coating is suitable for large-scale production.

The application discloses a kind of radiation refrigeration heat insulation coatings, including primer and finish, primer includes deionized water, PH regulator, defoaming agent, hydroxypropyl methyl cellulose, wetting agent, dispersant, water-based polyurethane emulsion, aerogel, hollow glass microsphere, sepiolite, film forming aid;Finish includes deionized water, PH regulator, defoaming agent, hydroxypropyl methyl cellulose, dispersant, silicon oxide, zirconium oxide, rutile titanium dioxide, infrared reflective filler, film forming aid, defoaming agent, far infrared ceramic powder, potassium silicate, silica sol, titanium sol, silane modified acrylic emulsion, conductive mica powder.The coating has excellent solar reflectance and infrared emissivity, low thermal conductivity, and the coating has excellent high-temperature resistance, flame resistance and anti-staining effect.

To provide a sheet product which is inconspicuous even when stuck to window glass, has excellent weather resistance to light or the like, and can effectively prevent the intrusion of harmful insects.SOLUTION: The sheet product has a chemical volatilization surface on one side and an attachment surface on the other side, and the attachment surface of the sheet product is attached to a glass plate based on JISA5759 to prepare a test piece, and a spectral reflectance in a wave range of 300 to 2500nm is measured with an outer surface of the chemical volatilization surface facing a light source to obtain a solar reflectance, the solar reflectance being 15% or more.SELECTED DRAWING: None

The invention belongs to the technical field of radiation refrigeration, and discloses a polymer-based double-layer radiation refrigeration composite material and a preparation method thereof. The composite material is formed by compounding a radiation refrigeration fiber membrane and a phase change material, the fiber membrane is prepared by taking polyacrylonitrile and polytetrafluoroethylene particles as raw materials through electrostatic spinning, and then the fiber membrane and polyvinyl alcohol / polyvinylpyrrolidone suspension dispersion liquid are subjected to pre-freezing and vacuum freeze drying to form a porous matrix; and finally, adsorbing polyethylene glycol in vacuum to obtain a double-layer composite structure. The prepared radiation refrigeration composite material has high solar reflectivity and high infrared emissivity, has excellent energy storage capacity, can realize 20-30 DEG C outdoor cooling in a hot environment, and can provide a feasible new path for building energy saving.

The invention provides a transparent radiation refrigeration coating as well as a preparation method and application thereof, and belongs to the technical field of energy-saving materials and optical coatings. By preparing the cholesteric liquid crystal upper layer composed of the hydroxy propyl cellulose, the hydrotropy water phase and the trace electrolyte, ordered self-assembly, screw pitch regulation and control and broadband Bragg reflection of molecular chains are achieved; then, a scattering enhancement layer composed of transparent organic silicon resin and hollow silicon dioxide microspheres is constructed below the middle infrared window section, Mie scattering is used for enhancing solar full-spectrum reflection, and meanwhile high visible light transmission and high emission of the middle infrared window section are kept. Through the synergistic effect of the liquid crystal cholesteric structure and the sub-wavelength scattering layer, the bottleneck that high light transmittance and high reflection of a transparent coating are difficult to achieve at the same time is broken through, high transparency can be kept, meanwhile, the solar reflectivity of 85% or above and the mid-infrared emissivity of 0.90 or above can be achieved, and the thermal stability, ultraviolet resistance and aging resistance of the coating are remarkably improved; the preparation of the low-cost, high-weather-resistance and efficient radiation refrigeration transparent coating is realized.

A multilayer optical film has an average total thickness T and includes a plurality of optical repeat units disposed between first and second skin layers where each optical repeat unit includes at least two polymeric layers. A total number of the optical repeat units disposed between the first and second skin layers is at least 10 and no more than about 300. Each optical repeat unit has an average total thickness of between about 70 nm and about 800 nm. For substantially normally incident light and for each of orthogonal first and second polarization states, the multilayer optical film has a photopically weighted visible light reflectance Rvis and an AM1.5 weighted solar reflection Rsolar, where Rvis / T > 1 % / micrometer, and Rsolar / T > 1 % / micrometer. An interlayer adhesion of the individual layers in the plurality of optical repeat units is at least about 1.5 N / cm.

This invention belongs to the field of building ceramics technology, specifically disclosing a radiation-cooling glaze, its preparation method, and lightweight ceramic bricks. The radiation-cooling glaze comprises a base glaze and radiation-cooling powder, wherein the radiation-cooling powder comprises nanoporous alumina and magnesium aluminum spinel doped with metal oxides, the metal oxide being selected from at least one of ferric oxide, manganese dioxide, cobalt trioxide, and copper oxide. This invention uses a composite of nanoporous alumina and magnesium aluminum spinel doped with metal oxides as the radiation-cooling powder, adding it to the surface glaze of lightweight ceramic bricks. This not only achieves good glaze quality and brick shape but also improves the solar reflectance ratio of the glaze, thus realizing a good radiation-cooling effect. The solar reflectance reaches 88-94%, and the glaze quality and brick shape are excellent, with a surface flatness of ±0.3 mm.

The invention provides an intelligent three-mode thermal management fabric based on dynamic spectrum regulation and a preparation method thereof, and belongs to the technical field of thermal management fabrics. The fabric is composed of a fabric bottom layer with high solar reflectivity and high emissivity and a functional layer, and the functional layer is made of thermochromic microcapsules and cesium tungsten bronze (CWO) nanoparticles. In a low-temperature environment, the thermochromic microcapsules are in a colored state and have a synergistic effect with the CWO nanoparticles, so that wide-spectrum solar energy absorption is realized, and efficient heating is provided. And when the environment temperature exceeds the phase change temperature of the thermochromic microcapsule, the microcapsule is converted into a colorless state, and is combined with a high-reflection matrix, so that the reflection of visible light is remarkably enhanced, and the solar radiation absorption is reduced. The self-adaptive heating side of the fabric has a strong heating mode and a weak heating mode, temperature self-adaptive graded warm keeping can be achieved, and the risk of overheating and low-temperature scalding is effectively avoided. Meanwhile, the fabric bottom layer has a radiation refrigeration function, and the fabric bottom layer can be switched into a refrigeration mode by turning over the fabric.

A composite radiative cooling material comprises a first layer, a second layer, and a third layer. The first layer comprises a reflective material, the second layer comprises a porous material, and the third layer comprises a reflective material. The optical properties of the respective materials and the arrangement of the layers result in the radiative cooling material exhibiting a total solar reflectivity greater than 85% and a thermal emissivity greater than 85% in the wavelength range of 8 to 13 μm. These layers can be arranged in a vertically stacked configuration, wherein when the composite radiative cooling material is installed to cool a load, the third layer can directly face the sky, the second layer is arranged below the third layer, and the first layer is arranged below the second layer. The composite radiative cooling material can be thermally coupled to the cooling load to provide radiative cooling to the cooling load.

This application discloses a gradient flame-retardant passive radiation cooling coating with a self-layered structure, its preparation method, and its application. The coating comprises a hydrophobically modified optical functional phase, a high-density inorganic flame-retardant material, a high infrared emissivity film-forming substrate, a non-ionic fluorocarbon layering inducer, and auxiliary additives. The preparation method involves optical separation modification, pre-preparing the optical functional liquid and flame-retardant suspension using a high-speed disperser, and achieving one-step coating film formation under the control of the inducer. Utilizing the surface energy gradient difference exceeding gravitational sedimentation, a gradient double-layer structure of an upper cooling layer and a lower flame-retardant layer is spontaneously constructed during liquid curing. This achieves a solar reflectivity ≥96% in the 0.3µm-2.5µm wavelength band, an infrared emissivity ≥96% in the 8µm-13µm infrared band, and a cooling effect of 6~8.5℃. The bottom flame-retardant layer rapidly cokes upon contact with fire to form a dense heat-insulating layer with a fire resistance limit of 2.3 hours. This application exhibits excellent optical performance, achieving cooling, energy saving, and fire retardancy. The process is simple and the manufacturing cost is low, making it suitable for building energy conservation and fire protection applications.

This invention discloses a high-refractive-index contrast radiation-cooling coating, belonging to the technical field of radiation-cooling coatings. The raw materials of this invention's high-refractive-index contrast radiation-cooling coating include hollow microspheres, high-refractive-index pigments, film-forming substances, solvents, and additives. The coating process of this invention's radiation-cooling coating is a two-coat process. First, an inner coating is applied to the substrate surface using the radiation-cooling coating with rutile titanium dioxide as the high-refractive-index pigment. Then, an outer coating is applied to the surface of the inner coating using the radiation-cooling coating with zirconium dioxide and / or zirconium silicate as the high-refractive-index pigments. This invention introduces a closed, independent bubble structure into the coating using hollow microspheres, combined with a preferred high-refractive-index pigment, to increase the refractive index difference between adjacent components in the coating, significantly enhancing its solar reflectance, thereby achieving excellent radiation-cooling performance under strong sunlight.

The disclosure relates to corrosion-inhibiting coating compositions, coated articles and methods for inhibiting corrosion on substrates. The compositions disclosed herein include a polymeric binder resin system and a corrosion inhibiting solar reflective compound having a specific total solar reflectance (TSR) and a specific HOMO-LUMO bandgap.

To provide a material that is color-developing, has heat-shielding properties, and is weather-resistant and durable. [Solution] A structure that exhibits structural color, comprising white spherical fine particles and black particles having a near-infrared solar reflectance of 50% or more; a paint containing the structure; and a laminate having a layer containing the structure.

The application discloses a composite textile with passive radiative cooling and heat preservation functions and a preparation method thereof, and the method comprises the following steps: preparing a porous polypropylene fiber membrane through a melt-blown process, depositing silicon dioxide nanoparticles through ultrasonic deposition, and then adopting a laminating process to combine a polyurethane microporous membrane and a carbon nanotube film, so that the composite textile with double-mode heat management characteristics is obtained. When the polyurethane layer faces the sun, the material shows high solar reflectivity and high infrared emissivity in the atmospheric window band, so that efficient passive radiative cooling is realized; when the carbon nanotube film faces the sun, the material has high solar absorptivity and low infrared emissivity, so that excellent heat preservation performance is realized. The method is simple in process, suitable for large-scale production, can effectively reduce energy consumption, and has a wide application prospect in the fields of personal heat management and the like.