21 results about "Uv absorption" patented technology

This invention provides modified zinc oxide and its applications, UV- and ozone-resistant self-lubricating materials and their preparation methods and applications, relating to the field of composite material technology. The modified zinc oxide provided by this invention is obtained by grafting zinc oxide onto a silane coupling agent using 2-mercaptobenzimidazole. The modified zinc oxide provided by this invention combines the excellent aging resistance of 2-mercaptobenzimidazole with the excellent UV absorption properties of zinc oxide, while also improving the dispersibility of nano-zinc oxide and overcoming the volatilization and migration problems of 2-mercaptobenzimidazole. This significantly improves the UV and ozone resistance of resin composites and effectively enhances their wear resistance. Resin composites filled with modified zinc oxide exhibit good reliability and service life in near-space environments, and show promising application prospects as self-lubricating pad materials for steering, load-bearing, rotating, and bushing components of aircraft.

Metal-organic frameworks (MOFs) may be prepared to contain a high loading of one or more hydrophobic adsorbates therein. Suitable metal-organic frameworks may exhibit stable retention of hydrophobic adsorbates within the pore space of the MOF, such as MOF loadings of at least 20% without appreciable environmental leaching over 24 hours. Certain hydrophobic adsorbates may exhibit unexpectedly higher photostability and UV absorption as compared to the respective free hydrophobic adsorbates.

This invention provides a colorimetric / fluorescence dual-mode nanozyme aptamer sensor, its preparation method, and its application in bisphenol A (BPA) detection. The sensor comprises a metal-organic framework nanozyme loaded with a BPA aptamer, hydrogen peroxide, and a chromogenic substrate, TMB. Cu / Zr-MOF oxidizes the colorless TMB to blue oxTMB, producing a UV absorption peak at 652 nm and a fluorescence emission peak at 415 nm. Modification with the BPA aptamer enhances the specific recognition ability of BPA, while simultaneously inhibiting the enzyme activity of Cu / Zr-MOF, leading to weakened colorimetric and fluorescence signals. In the presence of BPA, the aptamer specifically binds to the target and dissociates from the nanozyme surface, restoring enzyme activity and enhancing colorimetric and fluorescence signals. This invention integrates the excellent catalytic ability of nanozymes with the specific recognition ability of aptamers into a single system, achieving highly sensitive BPA detection.

The invention relates to an anti-ultraviolet agent, an anti-ultraviolet PP-based composite material as well as a preparation method and application of the anti-ultraviolet PP-based composite material. The composite material comprises the following components in parts by weight: 60-90 parts of polypropylene, 10-40 parts of talcum powder, 1-10 parts of an anti-ultraviolet agent, 5-20 parts of a flexibilizer, 0.5-5 parts of a compatibilizer, 0.3-1 part of an antioxidant and 1-5 parts of a lubricant. The anti-ultraviolet agent is tannic acid jointly modified by a silane coupling agent and a triazine ultraviolet absorbent containing an epoxy group, the anti-ultraviolet agent is prepared through hydrolysis, metal ion chelation and epoxy ring-opening grafting reaction, a macromolecular structure is formed, migration in a matrix is effectively inhibited, and the ultraviolet absorption wave band is widened. The invention also provides a preparation method of the composite material. The preparation method comprises the steps of raw material drying, premixing, melt extrusion and molding. The composite material has excellent anti-ultraviolet performance and good mechanical performance, is low in cost, simple in process and environment-friendly, and is particularly suitable for manufacturing the automobile lamp shell.

Multi-layer films, and processes to make the films, that enable the delivery of a substrate featuring a peelable thin layer of low haze, amorphous, isotropic film with the desired properties of high modulus, high usage temperature, UV blockage, and toughness. The films are made using a co-extrusion, co-orientation and annealing process to enable the delivery of a thin isotropic, UV blocking layer on top of a release layer and support substrate. These film constructions can be kept together during additional processing steps such as coating and converting. The release and dimensionally stable substrate layer can be easily removed once processing steps are completed.

The present invention relates primarily to graphitic carbon nitride having a porous structure, wherein the graphitic carbon nitride has at least one heptazine unit, originates from a first type of pore having a non-pore diameter of 1 nm or more and less than 15 nm, and originates from a second type of pore having a non-pore diameter of 15 nm or more and less than 50 nm, and has a pore volume greater than 0.0045 cm³ / g. The graphitic carbon nitride can provide enhanced UV absorption characteristics and can display a desired color.

The application provides a laser release layer material and a preparation method and application thereof. The laser release layer material comprises the following components in parts by weight: 10-30 parts of a thermoplastic resin, 0.5-4 parts of inorganic nanoparticles and 0.5-4 parts of a light response filler. The UV-vis transmittance of the light response filler is 0.001%-10%. The laser release layer material is prepared by designing the material of the laser release layer, further using the thermoplastic resin, cooperating with the inorganic nanoparticles and the light response filler with a specific UV absorption value. The laser release layer material has excellent performance. After the laser release layer prepared from the laser release layer material is debonded, the laser release layer material remaining on the wafer surface can be cleaned together with the adhesive layer, the production efficiency is accelerated, and the types of cleaning agents are reduced.

This invention discloses a combustion environment aerodynamic parameter measurement system and method based on the strong absorption advantage of ultraviolet (UV) spectroscopy, belonging to the field of combustion diagnostic technology. The measurement system includes: a fiber-optic coupled in-situ measurement unit for fiber-optic coupling of a UV beam emitted from a UV light source to obtain fiber-optic coupled absorption spectral signals of various small-area points; a UV absorption measurement and control analysis unit for obtaining the first UV absorption spectrum of each small-area point; a simulation unit for obtaining the second UV absorption spectrum of each small-area point; a training unit for training a neural network using the second UV absorption spectrum; and a calculation unit for calculating combustion environment aerodynamic parameters using the first UV absorption spectrum and the trained neural network. This invention can improve the accuracy of short-path probe measurements of combustion environment aerodynamic parameters.

Disclosed in certain embodiments is a coating composition and coating formed therefrom comprising a solvent, a binder, a UVA absorbing compound, and photonic particles such as porous metal oxide particles, hybrid metal oxide particles, closed-cell metal oxide particles, or a combination thereof. The coating compositions form a coating that exhibits a UV attenuation boost.

Provided are a composition for UV absorption that has a superior UV absorption function, and is superior in dispersibility while absorbing, in particular, UVA (wavelength: 315 to 380 nm) and UVB (wavelength: 280 to 315 nm), a method for manufacturing the same, and a UV absorption method using the same. The composition for UV absorption includes a carbon-based quantum dot, an aqueous solvent, a surfactant, and an oily base. Alternatively, the composition for UV absorption includes a carbon-based quantum dot, an aqueous solvent, and a hydrophilic base. The method for manufacturing a composition for UV absorption includes a step of mixing an aqueous dispersion containing a carbon-based quantum dot and an aqueous solvent, a surfactant, and an oily base. The method for manufacturing a composition for UV absorption includes a step of mixing an aqueous dispersion containing a carbon-based quantum dot and an aqueous solvent, and a hydrophilic base.

UV-absorbing color-forming compounds and compositions containing the compounds are provided. One or more of the compounds can be incorporated into cosmetic compositions, such as sunscreens, hair care products, and other personal care products, as well as skin care products. The compounds can also be incorporated into compositions such as paints, resins, and dyes to protect surfaces from damage caused by UV exposure. The present disclosure contains constrained pentadienoate structures to minimize or eliminate their photochemical reactivity, and exhibits a λ range of 300 to 370 nm for effective absorption of UV-A and UV-B rays. max The present invention provides a color-forming compound having the formula:

This invention discloses a method for preparing a modified bentonite composite material with antioxidant and UV-resistant properties, belonging to the field of cosmetic technology. The composite material is composed of carboxymethyl chitosan, sodium alginate, modified bentonite, curcumin, glycerin, and deionized water. This invention modifies the surface of bentonite with organic acids, introducing abundant carboxyl groups into its nanosheets. These carboxyl groups form a hydrogen bond network with the phenolic hydroxyl groups of curcumin, resulting in self-assembly and spatial confinement effects that inhibit polyphenol degradation. Simultaneously, the multi-level scattering of bentonite and the intrinsic UV absorption of curcumin synergistically achieve broad-spectrum UV shielding (transmittance ≤4.28%) without chemical sunscreen agents and highly effective antioxidant properties (DPPH scavenging rate 80.13%, ABTS scavenging rate 89.24%). An innovative incorporation of gluconolactone as an in-situ acidification switch is used: before cross-linking, it is a liquid solution that can be directly used as sunscreen, lotion, or serum; after cross-linking, it transforms into an elastic gel that can be used as a facial mask. This invention achieves flexible transformation of the same material system from liquid to solid state, providing a platform-based solution for the cosmetic technology field.

This invention provides a method for lignin esterification grafting modification and a method for preparing esterified grafted lignin-PVA composite films. By introducing long carbon chains into the lignin molecule through esterification modification, this invention significantly improves the compatibility between lignin and PVA, enhances the interfacial bonding force between the two phases, and significantly improves the tensile strength and elongation at break of the composite film, resulting in superior mechanical properties compared to traditional unmodified lignin composite films. Esterification modification retains and enhances the UV absorption capacity of lignin, and the modified lignin forms a uniform UV shielding network in the PVA matrix, significantly improving the UV aging resistance of the composite film and extending its service life in outdoor environments. After esterification modification and grafting of long carbon chains, the lignin molecular structure changes, resulting in a significantly lighter color and a lighter, more uniform appearance of the prepared composite film, broadening its application range in light-colored packaging, transparent coatings, and outdoor decoration.

Metal-organic frameworks (MOFs) may be prepared to contain a high loading of one or more hydrophobic adsorbates therein. Suitable metal-organic frameworks may exhibit stable retention of hydrophobic adsorbates within the pore space of the MOF, such as MOF loadings of at least 20% without appreciable environmental leaching over 24 hours. Certain hydrophobic adsorbates may exhibit unexpectedly higher photostability and UV absorption as compared to the respective free hydrophobic adsorbates.

GRAPHITICAL CARBON NITRIDE WITH POROUS STRUCTURES The present invention relates mainly to a graphitic carbon nitride with porous structures, the graphitic carbon nitride having at least one heptazine motif and a pore volume greater than 0.0045 cm³ / g, derived from a first type of pore having a specific pore diameter of 1 nm or more and less than 15 nm, and derived from a second type of pore having a specific pore diameter of 15 nm or more and 50 nm or less. The graphitic carbon nitride can provide improved UV absorption properties and exhibit the desired colors. Figure for abstract: none

The invention belongs to the technical field of contact lenses, and provides a preparation method of an anti-UV radiation-proof colored contact lens. The preparation method comprises the following steps: mixing a siloxane monomer, a hydrophilic monomer, a cross-linking agent and an initiator I to obtain a pre-polymerized solution I; mixing unsaturated esters, an initiator II, a UV absorbent and a UV absorption aid to obtain a pre-polymerized solution II; injecting the pre-polymerized liquid II into a contact lens mold printed with a colored pattern, and curing; and continuing to inject the prepolymerization liquid I, and curing. The UV absorption layer and the hydrophilic silica gel layer are separately arranged, and the UV absorption auxiliary agent compounded by the modified nano silicon dioxide and the modified nano silicon nitride is added and is cooperatively used with the UV absorbent, so that the anti-UV and anti-radiation effects are improved, and meanwhile, relatively high wearing comfort is kept.

The present invention relates to the technical field of environmental monitoring, and discloses an ultraviolet photolysis ozone detector with a self-calibration function, the ultraviolet photolysis ozone detector comprises a cabinet, an isolation layer and an isolation plate are arranged in the cabinet, and the internal space is divided into an electric control area and a gas path area which are mutually sealed. Core electronic elements such as a main circuit board and the like are arranged in the electric control area, and all components such as an ultraviolet absorption cell and the like which are in contact with gas are arranged in the gas path area. A fan and a heat conducting plate are arranged in the electric control area, heat is conducted to the outside through internal air circulation, and effective heat dissipation in a sealed state is achieved. The detector is also integrated with a set of self-calibration system which comprises an ozone washing device and an ozone generator, and a main control unit controls an electromagnetic valve group to automatically switch gas paths and execute zero point and span calibration. Circuit corrosion is prevented through physical isolation design, high precision of long-term measurement is guaranteed through an automatic calibration function, reliability is improved through sealing heat dissipation, the service life of equipment is remarkably prolonged, and maintenance cost is reduced.

Metal-organic frameworks (MOFs) may be prepared to contain a high loading of one or more hydrophobic adsorbates therein. Suitable metal-organic frameworks may exhibit stable retention of hydrophobic adsorbates within the pore space of the MOF, such as MOF loadings of at least 20% without appreciable environmental leaching over 24 hours. Certain hydrophobic adsorbates may exhibit unexpectedly higher photostability and UV absorption as compared to the respective free hydrophobic adsorbates.

The embodiment of the invention provides a system and a method for judging an air scrubbing end point in a regeneration process of fine treatment resin, and the method comprises the following steps: obtaining background turbidity of demineralized water, carrying out pollutant component analysis on invalid resin, and determining a characteristic absorption peak of a main pollutant; a scrubbing step is started, and turbidity data and pollutant characteristic UV absorption spectrum data of scrubbing drainage in the drainage main pipe are collected in real time; on the basis of an AI prediction model, the scrubbing end point is dynamically judged in combination with the turbidity, the UV absorption peak attenuation trend and temperature compensation in the drainage mother pipe; and the scrubbing end point is verified, after verification is passed, UV point scanning analysis is carried out, if the absorption peak value is lower than the initial peak value, scrubbing is ended, and otherwise, an abnormal alarm signal is output.

Metal-organic frameworks (MOFs) may be prepared to contain a high loading of one or more hydrophobic adsorbates therein. Suitable metal-organic frameworks may exhibit stable retention of hydrophobic adsorbates within the pore space of the MOF, such as MOF loadings of at least 20% without appreciable environmental leaching over 24 hours. Certain hydrophobic adsorbates may exhibit unexpectedly higher photostability and UV absorption as compared to the respective free hydrophobic adsorbates.

The utility model discloses an LED lighting device based on weak blue light design, which comprises a lamp holder, a lamp pole and a lamp cap, a lamp cap cavity is formed in the lamp cap, an LED lamp source is arranged in the lamp cap cavity, the LED lamp source comprises a UV-LED chip module and a three-primary-color fluorescent glue layer, the UV-LED chip module comprises a substrate and a UV-LED chip, the UV-LED chip is fixed on the substrate, and the three-primary-color fluorescent glue layer is arranged on the substrate. And the three-primary-color fluorescent glue layer covers the surface of the UV-LED chip. The LED lamp source further comprises a second lampshade and at least two UV absorption layers, the UV-LED chip module is located in a lamp source cavity in the second lampshade, the two UV absorption layers sequentially cover the outer surface of the second lampshade from inside to outside, and the UV absorption layers comprise carbon-based quantum dots. The UV-LED chip is adopted to replace a traditional blue light chip, the three-primary-color fluorescent glue layer is excited by ultraviolet light or near ultraviolet light to synthesize white light, and due to the fact that blue light is not directly emitted by the LED chip, blue light radiation can be greatly reduced, and emission of the blue light component is reduced from the source of a lamp. And moreover, the quantum dot UV absorption layer is coated outside the LED lamp source, so that ultraviolet radiation emitted by the chip module can be absorbed and shielded, and the damage of the ultraviolet radiation to a human body is effectively avoided.