Abstract: A device including a housing that is substantially impermeable to ultraviolet radiation having a wavelength of from 280 nm to 400 nm, and at least one window defined in the housing, the window including a UV-C radiation band-pass mirror film having a multiplicity of alternating first and second optical layers collectively transmitting UV-C radiation at a wavelength from at least 100 nm to less than 280 nm and not transmitting UV-A and UV-B radiation at a wavelength of from 280 nm to 400 nm, and an ultraviolet radiation source positioned within the housing, the ultraviolet radiation source being capable of emitting ultraviolet radiation at one or more wavelength from 100 nm to 400 nm. The device optionally further includes an ultraviolet mirror film positioned within the housing so as to reflect ultraviolet radiation emitted by the ultraviolet radiation source. A method of disinfecting a material is also disclosed.

Abstract: The composition includes an antimicrobial monomer represented by formula CH2?C(R1)—C(O)—O-Q-N+(R)2CnH2n+1(X—), a non-fluorinated crosslinking monomer having at least two acrylate groups, methacrylate groups, or a combination thereof, a polar monomer having at least one of acrylic acid, methacrylic acid, or a carboxylate salt thereof, and a nonpolar monomer represented by formula CH2?C(R1)—C(O)—O—R2. The antimicrobial monomer, the non-fluorinated crosslinking monomer, the polar monomer, and the nonpolar monomer together account for greater than 95 percent by weight, based on the total weight of the composition. The article includes a film having a plurality of pendent groups represented by formula —C(O)—O-Q-N+(R)2CnH2n+1(X—) covalently bonded in a crosslinked non-fluorinated acrylic network. A method of making an article is also described.

Abstract: A light guide comprising a polymeric layer at least 25 percent transmissive over at least a 30 nm bandwidth in a wavelength range from 180 to 280 nm over a distance of at least 100 micrometers and visible light transparent reflecting layers (UV-C mirror) that are at least 50 percent reflective over at least 30 nm bandwidth in a wavelength range from 180 to 280 nm over an incident light angle of 0 to 90 degrees and that are at least 25 percent transmissive of visible light over at least 30 nm bandwidth in a wavelength range of 400 to 800 nm over an incident light angle of 0 to 90 degrees. The light guide is useful, for example, for antimicrobial surfaces.

Abstract: Anti-reflective article includes a layer defining an anti-reflective surface. The anti-reflective surface includes a series of alternating micro-peaks and micro-spaces extending along an axis. The surface also includes a series of nano-peaks extending along an axis. The nano-peaks are disposed at least on the micro-spaces and, optionally, the micro-peaks. The article may be disposed on a photovoltaic module or skylight to reduce reflections and resist the collection of dust and dirt.

Abstract: A composite cooling film (100) comprises an antisoiling layer (160) secured to a first major surface of a reflective microporous layer (110). The reflective microporous layer (110) comprises a first fluoropolymer and is diffusely reflective of electromagnetic radiation over a majority of wavelengths in the range of 400 to 2500 nanometers. The antisoiling layer (160) has an outwardly facing antisoiling surface (162) opposite the micro-voided polymer film. An article (1100) comprising the composite cooling film (1112) secured to a substrate (1110) is also disclosed.

Abstract: A low-emissivity film for an article of personal protective equipment (PPE) having a lens is provided. The low-emissivity film is configured to be attached to at least one of an inner surface and an outer surface of the lens. A low-emissivity coating for the article of PPE is also provided.

Abstract: The present disclosure provides a radiative cooling article including a white diffusely reflective microporous layer and a non-white color reflective mirror film having first and second optical layers. The white diffusely reflective microporous layer has a solar weighted reflectivity at normal incidence of electromagnetic radiation over a majority of wavelengths in a range of 350 nanometers (nm) to 2500 nm of 0.8 or greater, 0.85, 0.9, or 0.95 or greater. The non-white color reflective film is disposed adjacent to a major surface of the white diffusely reflective microporous layer and the non-white color reflective film reflects a wavelength bandwidth of at least 30 nm within a wavelength range of 350 nm to 700 nm. The non-white color reflective film can be tuned to reflect light of a specific color (e.g., blue light, green light, or red light). The radiative cooling article may be useful for applications including commercial graphics located outdoors (e.g., on vehicles or buildings).

Abstract: Multilayer articles are provided, including an absorbent layer and an ultraviolet mirror containing at least a plurality of alternating first and second optical layers. The absorbent layer absorbs ultraviolet light having a wavelength between at least 230 nanometers (nm) and 400 nm. The ultraviolet mirror reflects ultraviolet light in a wavelength range from 190 nm to 240 nm. Systems are also provided including a broadband UVC light source and a multilayer article. Devices are provided including a chamber, a broadband UVC light source located within the chamber, an absorbent layer in the chamber, and an ultraviolet mirror between the light source and absorbent layer. Methods of disinfecting a material are further provided, including obtaining a system or device, directing UVC light at the ultraviolet mirror, and exposing the material to ultraviolet light in a wavelength range from 190 nm to 240 nm, reflected by the ultraviolet mirror towards the material.

Abstract: Passive cooling articles may include a first element defining a high absorbance in an atmospheric infrared wavelength range and a high average reflectance in a solar wavelength range. The first element may define a first major surface (114, 214, 314, 414) positioned and shaped to reflect solar energy in the solar wavelength range to an energy absorber (108, 208, 308, 408, 508, 608) spaced a distance from the first major surface (114, 214, 314, 414). The energy absorber (108, 208, 308, 408, 508, 608) may be a heating panel or a photovoltaic cell. A second element may define a high thermal conductivity and thermally coupled to a second major surface (116, 216, 416) of the first element to transfer thermal energy from the second element to the first element to cool the second element.

Abstract: A hybrid solar window comprises: at least one glazing; a wave-length-selective solar mirror positioned to reflect IR toward an IR absorbing element. The IR absorbing elements comprises a conduit having a respective fluid inlet and fluid outlet, and an IR absorbing compound, wherein the IR absorbing compound is in thermal communication with the conduit. The wavelength-selective solar mirror has an average visible light transmittance of at least 50 percent and an average IR reflectance of at least 50 percent over the wavelength range of 850 to 1150 nanometers, inclusive. The IR absorbing element is configured to transfer thermal energy to a heat transfer fluid circulating through the conduit, wherein the IR absorbing element has an average visible light transmittance of at least 30 percent, and wherein each IR absorbing element has an average IR absorptance of at least 50 percent over the wavelength range 850 to 1150 nanometers, inclusive. Certain IR absorbing elements are also disclosed.

Abstract: A composite cooling film including a reflective nonporous inorganic-particle-filled organic polymeric layer, an ultra-violet-protective layer or layers, and an antisoiling layer.

Abstract: A composite cooling film including non-fluorinated organic polymeric layer, a metal layer disposed inwardly of the non-fluorinated organic polymeric layer, and an antisoiling, ultraviolet-absorbing hardcoat layer that is disposed outwardly of the non-fluorinated organic polymeric layer.

Abstract: A composite cooling film including a reflective nonporous inorganic-particle-filled organic polymeric layer, an ultra-violet-protective layer or layers, and an antisoiling layer.

Abstract: A composite cooling film including non-fluorinated organic polymeric layer, a metal layer disposed inwardly of the non-fluorinated organic polymeric layer, and an antisoiling, ultraviolet-absorbing hardcoat layer that is disposed outwardly of the non-fluorinated organic polymeric layer.

Abstract: Passive cooling article (120) includes a plurality of first elements (122) defining a high absorbance in the atmospheric window wavelength range and defining high average reflectance in the solar wavelength range and a plurality of second elements (124) defining a low absorbance in the atmospheric window wavelength range and defining high average reflectance in the solar wavelength range, wherein the plurality of first (122) and second (124) elements are interspersed to form a major structure having a first major surface (130) comprising the first element outer surfaces (126) and the second element outer surfaces (128), wherein the first element outer surfaces (126) face a first direction toward a first end region (136) of the major structure (130) and the second element outer surfaces (128) face a second direction toward a second end region (136) of the major structure. The article (120) may be applied to a substrate (104), for example, on a generally vertical surface of a vehicle or stationary structure.

Abstract: Ultraviolet-C (UV-C) radiation shielding films including a substrate made of a fluoropolymer, a multilayer optical film disposed on a major surface of the substrate, and a heat-sealable encapsulant layer disposed on a major surface of the multilayer optical film opposite the substrate. The multilayer optical film is made of at least a multiplicity of alternating first and second optical layers collectively reflecting at an incident light angle of at least one of 0°, 30°, 45°, 60°, or 75°, at least 30 percent of incident ultraviolet light over at least a 30-nanometer wavelength reflection bandwidth in a wavelength range from at least 100 nanometers to 280 nanometers. The ultraviolet light shielding film may be applied to a major surface of a photovoltaic device, such as a component of a satellite or an unmanned aerial vehicle. Methods of making the UV-C radiation-protective films also are disclosed.

Abstract: A composite cooling film comprises an anti soiling layer of fluorinated organic polymeric material and a reflective metal layer that is disposed inwardly of the anti soiling layer, wherein the antisoiling layer comprises a first, outwardly-facing, exposed antisoiling surface and a second, inwardly-facing opposing surface.

Abstract: A composite cooling film includes a reflective microporous layer that comprises a continous phase comprising an organic polymer, an ultraviolet-absorbing layer of organic polymeric material that is disposed outwardly of the reflective microporous layer, and an anti soiling layer being disposed outwardly of the reflective microporous layer.

Abstract: A dental appliance includes a polymeric shell with a plurality of cavities for receiving one or more teeth, including an interior region with a core layer of a first thermoplastic polymer A with a thermal transition temperature of about 70° C. to about 140° C. in and a flexural modulus greater than about 1.3 GPa, and first and second interior layers of a second thermoplastic polymer B with a glass transition temperature of less than about 0° C. and a flexural modulus less than about 1 GPa; and first and second exterior layers of a third thermoplastic polymer C with a thermal transition temperature of about 70° C. to about 140° C. and a flexural modulus greater than about 1.3 GPa. Interfacial adhesion between any of the adjacent layers in the polymeric shell is greater than about 150 grams per inch.

Abstract: A composite cooling film (100) comprises an antisoiling layer (160) secured to a first major surface of a reflective microporous layer (110). The reflective microporous layer (110) comprises a first fluoropolymer and is diffusely reflective of electromagnetic radiation over a majority of wavelengths in the range of 400 to 2500 nanometers. The antisoiling layer (160) has an outwardly facing antisoiling surface (162) opposite the micro-voided polymer film. An article (1100) comprising the composite cooling film (1112) secured to a substrate (1110) is also disclosed.