632 results about "Photochromism" patented technology

Some variations provide a photochromic heterostructure comprising: first semiconductor nanoparticles that have an average first-nanoparticle effective diameter from 1 nanometer to 20 nanometers, wherein the first semiconductor nanoparticles are not doped; and second semiconductor nanoparticles that have an average second-nanoparticle effective diameter from 1 nanometer to 60 nanometers, wherein the second semiconductor nanoparticles are doped with one or more transition metals, wherein the second semiconductor nanoparticles have a bandgap energy that is higher than the bandgap energy of the first semiconductor nanoparticles, and wherein the first semiconductor nanoparticles and the second semiconductor nanoparticles are in physical contact with each other. The disclosed photochromic heterostructure is especially useful when lower-energy light excites lower-energy-bandgap first nanoparticles to cause higher-energy-bandgap, doped second nanoparticles to photodarken. If the first nanoparticles were not present, the doped second nanoparticles would require higher-energy light to cause darkening. Examples demonstrate embodiments of the invention.

The present invention belongs to the technical field of mechanochromic materials, and specifically relates to a mechanochromic material containing rhodamine with a hydantoin structure, and its preparation method and application. The rhodamine mechanochromic material containing a hydantoin structure is shown in structure (I), with rhodamine B as the matrix, reduced to rhodamine alcohol, oxidized to generate rhodamine aldehyde, and reacted with hydantoin to prepare a six-membered spirocyclic rhodamine containing a hydantoin structure. The rhodamine compound containing a hydantoin structure involved in the present invention has good ion interference resistance, exhibits photochromic properties in a dichloromethane solvent, and has the properties of mechanical stress discoloration and solvent mixing stress discoloration with high contrast and good repeatability. The solid powder of the rhodamine mechanochromic material containing a hydantoin structure has the characteristic of changing color upon grinding. After the action of mechanical force, the color of the powder changes from yellow to pink, and a reversible color change is achieved during the grinding-heating process.

The invention relates to the technical field of ceramic back plates, in particular to an integrated photochromic casting ceramic back plate material and a preparation method thereof. The chemical formula of the ceramic backboard material is BaMgSiO4EuxFey, wherein 0 lt; x is less than or equal to 0.01, 0lt; and y < = 0.01. The rare earth element Eu and the transition metal element Fe are cooperatively doped, so that the color change contrast ratio and the hardness of the ceramic are remarkably improved; x and y meet the following requirements: 0.002 lt; x is less than or equal to 0.008, 0.002 lt; y is less than or equal to 0.008, so that the color-changing contrast ratio and the hardness of the ceramic back plate material can be further improved, the color-changing contrast ratio is more than 90%, and the Vickers hardness is more than 600Hv; the response time of the ceramic backboard material is prolonged to be less than 8 s, the color change fatigue resistance is high, the chemical stability is good, and the structure supporting and photochromic functions are achieved.

The invention discloses a high-toughness grouting material and a preparation method thereof, and belongs to the technical field of building materials. The photochromic thermal insulation material is prepared from the following raw materials in percentage by mass: 30 to 36 percent of sulphoaluminate cement, 28 to 32 percent of quartz sand, 0.4 to 0.9 percent of nano graphene / carbon tube hybrid, 12 to 15 percent of superfine composite admixture, 1.0 to 1.8 percent of temperature-sensitive shape memory alloy fiber, 1.5 to 2.0 percent of microbial self-repairing capsule, 15 to 18 percent of photochromic epoxy hybrid emulsion, 0.2 to 0.35 percent of polycarboxylate superplasticizer and 0.8 to 1.2 percent of magnetic iron oxide coated SiO2 expanding agent. According to the invention, the active inhibition that the crack width is less than or equal to 0.05 mm is realized through the shrinkage compensation of the magnetic field oriented expanding agent, the temperature-sensitive fiber phase change toughening and the photochromism-microorganism synergistic repair.

The invention relates to the technical field of textile materials, and particularly discloses a fabric capable of improving thermal protection performance and a preparation method and application of the fabric. Nano-scale aluminum oxide; polyethylene glycol diacrylate; a closed type waterborne polyurethane emulsion; a silane coupling agent containing a vinyl group; a photochromic dye; a thermochromic dye; the preparation method comprises the following steps: S1, preparing composite slurry; s2, applying the composite slurry to the surface of a fabric base material in a dot matrix form by adopting a screen printing process to form a coating; s3, the coating is irradiated with ultraviolet light; and S4, carrying out baking treatment on the fabric subjected to the ultraviolet light curing treatment at the temperature of 140-160 DEG C. According to the invention, the polyethylene glycol diacrylate, the closed waterborne polyurethane and the vinyl-containing silane coupling agent are adopted to form an interpenetrating polymer network structure in situ, so that when the obtained fabric is rubbed or washed and the like, the coating is not easy to crack and peel off.

Systems, methods and apparatuses are described for dimming one or more portions of an extended reality (XR) display. Control circuitry may be configured to generate for display, at the display, an XR object. A dimmable optical element may comprise a plurality of up-converting nanoparticles and a photochromic material, and is configured to cause a change in color of at least a portion of the display. The dimmable optical element may be irradiated with light of a first energy level which causes the plurality of upconverting nanoparticles to emit light of a second energy level higher than the first energy level. The photochromic material may absorb the light of the second energy level to cause the change in color of the at least a portion of the display.

The invention relates to the technical field of multi-point defocusing, in particular to an optical stable photochromic multi-point defocusing myopia control lens prescription generation method, which comprises the following steps of: based on eyes of a wearer, scanning cornea by using a non-contact optical device, extracting iris and pupil characteristics, monitoring an adjustment reaction, and performing three-dimensional reconstruction and multi-direction light path tracking analysis to obtain a myopia control lens prescription. And the distribution configuration of the annular belt is optimized, and the overlapping area is adjusted by combining the photochromic requirement, so that the fusion function partition structure is formed. Through collection of multi-source visual parameters and combination of spatial modeling and focusing path analysis, cut-through association of individual visual behaviors and structural attributes in lens customization is realized, functional requirements of different areas and photochromic response are dynamically fused through hierarchical adjustment of the spatial structure of an intervention area, and the visual performance of the lens is improved. And the material and microstructure data are synchronously output to a manufacturing link, so that the collaborative matching capability of the visual area partition is enhanced, and the requirements of a wearer on visual comfort and optical reaction are met.

The invention discloses a MoO3 / TiO2 heterojunction material with a photocatalytic memory effect and application of the MoO3 / TiO2 heterojunction material in degradation of quinolone antibiotics, and belongs to the technical field of inorganic non-metallic material preparation, solar energy utilization and environmental protection. A molybdenum source precursor solution and a titanium source precursor solution are adopted to react, polyvinylpyrrolidone is used for modifying the surface of the material, the MoO3 / TiO2 heterojunction material is obtained, and the material can generate photochromic and photocatalytic memory effects under the pre-illumination effect. The memory effect provides continuous driving force for the catalytic reaction, and the activity of the material in the dark-state catalytic process is remarkably enhanced. The MoO3 / TiO2 heterojunction material disclosed by the invention shows excellent catalytic degradation performance in practical application, and particularly shows extremely high catalytic efficiency in the aspect of water pollution control.

The invention relates to the technical field of multi-point defocusing, in particular to an optical stable photochromic multi-point defocusing myopia control lens prescription generation method, which comprises the following steps of: based on eyes of a wearer, scanning cornea by using a non-contact optical device, extracting iris and pupil characteristics, monitoring an adjustment reaction, and performing three-dimensional reconstruction and multi-direction light path tracking analysis to obtain a myopia control lens prescription. And the distribution configuration of the annular belt is optimized, and the overlapping area is adjusted by combining the photochromic requirement, so that the fusion function partition structure is formed. Through collection of multi-source visual parameters and combination of spatial modeling and focusing path analysis, cut-through association of individual visual behaviors and structural attributes in lens customization is realized, functional requirements of different areas and photochromic response are dynamically fused through hierarchical adjustment of the spatial structure of an intervention area, and the visual performance of the lens is improved. And the material and microstructure data are synchronously output to a manufacturing link, so that the collaborative matching capability of the visual area partition is enhanced, and the requirements of a wearer on visual comfort and optical reaction are met.

The invention relates to the technical field of textile materials, in particular to a photochromic curtain fabric and a preparation method thereof. The color-changing curtain fabric overcomes the problems of unstable color-changing performance and poor durability of the existing curtain fabric. The modified polyimide is synthesized through copolymerization and imidization reaction; carrying out two-stage melt blending on components such as a photochromic microcapsule and a composite dispersant with the modified polyimide to prepare a mixed material containing polyimide; performing spinning forming and surface modification to form surface modified polyimide fibers; and finally obtaining the photochromic curtain fabric through dip-coating curing and weaving processes. Polyimide is modified, so that the mechanical property and the color change stability of the fabric are enhanced; the other components cooperate with one another to improve the aging resistance of the fabric, and the requirements of the textile material on functionality and durability are met.

The invention discloses a method for controllably synthesizing intermediate valence tungsten oxide (WO3-x, 0.1 < = x < = 1) through a carbon reduction method, and belongs to the technical field of non-ferrous metal material preparation. The preparation method comprises the following steps: (1) mixing high-valence tungsten oxide powder with carbon powder, and carrying out uniform ball milling; and (2) putting the mixed powder under inert gas protection or vacuum conditions, and carrying out reduction reaction at high temperature. Tungsten oxide with different intermediate valence states is obtained by controlling the carbon type, the use amount, the temperature and the time. The method is suitable for precise preparation and phase structure regulation of the functional tungsten oxide intermediate, and can be used as a precursor of a new energy battery material or electrochromic and photochromic high-performance materials and the like.

The invention discloses a color-changeable and degradable polylactic acid non-slip mat and a production process thereof, and belongs to the technical field of non-slip mat production processes, the non-slip mat adopts a three-layer composite structure: a surface layer contains a temperature-sensitive color-changing material, so that temperature response dynamic color change is realized; the pattern layer is combined with the photochromic component and the embossed structure to generate a multi-angle photoresponse three-dimensional effect; a biodegradation aid is added to the bottom layer, so that the environment friendliness is ensured. The production process comprises the steps of layered low-temperature co-extrusion casting, high-precision synchronous embossing and shaping, dual-band ultraviolet curing coating and continuous slitting and rolling. According to the scheme, the technical bottleneck that a traditional non-slip mat is single in function and mutually exclusive in chemical discoloration degradation is broken through, the product has the dynamic visual effect and the controllable degradation characteristic, meanwhile, the production efficiency is remarkably improved, and the non-slip mat is suitable for household non-slip scenes.

The invention provides a tungsten oxide quantum dot-metal nano material photochromic composite film and a preparation method thereof. A metal nano material and tungsten oxide quantum dots are uniformly compounded by utilizing a water-soluble high polymer material. And the tungsten oxide quantum dot-metal nanomaterial photochromic composite film with more excellent photochromic performance than tungsten oxide is prepared. According to the tungsten oxide quantum dot-metal nano material photochromic composite film, the photochromic fading time is shortened to be within 2 hours, and the light modulation amplitude is gt; and the film has self-supporting performance. Compared with the prior art, the method for preparing the tungsten oxide quantum dot-metal nano material photochromic composite film is simple in process, controllable in process, free of expensive equipment and raw materials, good in process stability, high in yield and high in yield. The prepared tungsten oxide quantum dot-metal nano material photochromic composite film can be applied to any glass or resin substrate.

The invention relates to a photochromic polyester fiber and a preparation method thereof, the photochromic polyester fiber comprises a core layer and a skin layer, and the skin-core ratio is (20-80): (80-20); the core layer is prepared from the following raw materials in percentage by weight: 1 to 10 percent of photochromic polyester master batch and the balance of low-melting-point polyester chips; the photochromic polyester master batch is prepared from the following raw materials: photochromic powder, a titanate coupling agent, low-melting-point polyester powder, diatomite and aluminum nitride. The low-melting-point polyester material can reduce the damage of high temperature to the structure of the photochromic material, and the conventional polyester chips in the skin layer can further protect the photochromic material of the core layer, so that the service life of the photochromic material is prolonged, and the prepared photochromic polyester fiber has a good photochromic effect.

The invention relates to the technical field of functional composite color-changing materials, in particular to a dynamic color-changing flexible composite material and a preparation method and application thereof. The flexible composite material is prepared from the following raw materials: photochromic powder, a flexible film matrix, low-viscosity silicone oil and a curing agent, the chemical general formula of the photochromic powder is (Li < 0.1 > Na < 0.4 > Bi < 0.5 >) < 0.95-x > Bi < 2 > Pr < x > Y < 0.05 > Nb < 2 > O < 9 >, wherein x ranges from 0.001 to 0.05. According to the flexible composite material provided by the invention, inorganic photochromic powder doped with rare earth elements is introduced into a PDMS / low-viscosity silicone oil elastomer matrix, and the composite ratio of the photochromic powder to the flexible film matrix and the doping content of rare earth ions praseodymium in the photochromic powder are regulated and controlled; the real-time, accurate and reversible regulation and control of the optical characteristic color of the material are realized by virtue of photostimulation, and a brand new thought is provided for preparing an optical stealth material.

The application discloses a device for detecting crack defects of porcelain insulators and relates to the technical field of defect detection. The device aims at the problem of poor crack recognition effect when the existing crack detection device of the porcelain insulator adopts optical detection technology. The device comprises a box body, a fixed plate is fixedly connected to the upper side of the box body, and a containing box is arranged on the upper side of the fixed plate. The device has the advantages that the insulator body with a higher heating rate than normal temperature can be immersed into normal-temperature photochromic paint in the immersion tank, the cracks on the insulator body are caused to move away by thermal expansion and cold contraction, the paint is sucked into the cracks after the insulator body is cooled, the paint in the cracks is caused to change color when the ultraviolet lamp irradiates the insulator body, the color contrast between the cracks and the insulator body is obviously increased, the recognition effect of the high-definition camera is improved, and the recognition and detection efficiency and accuracy of the device are improved.

A vehicle includes a first photochromic glass. The vehicle further includes a first sensor configured to detect a condition inside an interior of the vehicle. The vehicle further includes a processor connected to the first photochromic glass and the first sensor. The processor is configured to determine whether to adjust a transmission rate of the first photochromic glass based on at least data from the first sensor and additional data, wherein the additional data relates to at least one of a condition inside the interior of the vehicle, other than the first condition, or information related to the first photochromic glass. The processor is further configured to transmit a signal to the first photochromic glass for changing the transmission rate of the first photochromic glass in response to a determination to change the transmission rate of the first photochromic glass.

The invention relates to the technical field of ceramic glaze production, in particular to interlayer chemical coupling long-acting noctilucent ceramic glaze as well as a preparation method and application thereof. The glaze is of a multi-layer composite structure and sequentially comprises a bottom-layer combined glaze layer, a core noctilucent functional glaze layer and a photochromic protective cover glaze layer from inside to outside. The core layer adopts a glaze system containing niobium pentoxide to realize chemical coupling with the bottom layer, and adopts a core-shell structure long afterglow luminescent material to realize white light adjustability; and the protective cover glaze layer adopts a WO3 / TiO2 / CeO2 composite system. The glaze is prepared through a two-step method of high-temperature primary firing and low-temperature secondary firing, and the obtained glaze is high in interlayer bonding strength, high in weather resistance, long in luminous life, capable of adapting to ambient light and suitable for safety sign products in extreme environments.

The invention belongs to the technical field of material science, and relates to a preparation method and application of an unsaturated bond extended tetraphenyl ethylene siloxane compound. An unsaturated bond is introduced into a siloxane group, and the siloxane group containing the unsaturated bond and a tetraphenyl ethylene derivative are subjected to a coupling reaction. The coupling reaction is carried out in an inert atmosphere, the temperature is 90-150 DEG C, and the time is 6-24 hours. And purifying the product by silica gel column chromatography to obtain the target compound. Unsaturated bonds are introduced into a tetraphenyl ethylene structure, so that the adjustability of the photochromic wavelength is realized, the performance of the compound is remarkably improved, the application range of the compound is remarkably widened, and a new thought and a new method are provided for development of photochromic materials.

The present application relates to the field of organic photo-functional materials, and particularly relates to a photochromic porous organic polymer based on spirooxazine and a preparation method and application thereof; compared with a spirooxazine molecular monomer, the photochromic porous organic polymer based on spirooxazine is formed by connecting two groups through an imine bond to form a covalent bond skeleton on the basis of not changing the structure of spirooxazine; compared with a conventional small-molecule spirooxazine compound, the porous organic polymer has solid-state photochromic ability, and has advantages of good fatigue resistance and excellent stability.

The invention provides a plush fabric invisible anti-counterfeiting method based on an optically variable material, and belongs to the technical field of textile anti-counterfeiting. The method comprises the following steps: providing a plush fabric with a final style; preparing anti-counterfeiting slurry containing photochromic microcapsules, a low-temperature crosslinking adhesive, a flatting agent and deionized water; applying the slurry to the base cloth of the fabric or the root of fluff through screen printing or digital ink-jet printing; and carrying out low-temperature fixation at 80-120 DEG C. The obtained fabric has the same appearance and handfeel under natural light, an anti-counterfeiting pattern is shown under ultraviolet light or sunlight irradiation, and the pattern disappears after a light source is removed. According to the method, complete invisibility of anti-counterfeiting is achieved, the soft hand feeling of the plush fabric is not damaged, the anti-counterfeiting threshold is high, and the method is suitable for the fields of high-end plush toys, home textiles and the like.

The invention provides a Schiff base material of which the molecular structural formula is at least one of the following formulas: the Schiff base material not only has the luminescence characteristic of chiral molecules, but also has the photochromic characteristic of Schiff base, can have the characteristic of intersection luminescence under co-excitation of ultraviolet light and blue-green light, and can be used in a display space of three-dimensional imaging of a static body. The Schiff base material is applied to three-dimensional display of a static body, is high in stability, good in reversibility, low in excitation light source power and low in risk, and can be prepared into devices for commercial application. The invention also provides a preparation method of the Schiff base material and a static body three-dimensional display system containing the Schiff base material.

This invention discloses a method for preparing and intelligently identifying microscopic stealth codes by integrating artificial intelligence and hyperspectral imaging, belonging to the field of anti-counterfeiting technology. The method comprises two parts: preparation and identification. During preparation, photochromic materials are doped into a substrate to form microscopic code points. A hyperspectral feature library is established, and a digital twin initial model containing partial differential equations is constructed, followed by pre-training of a physical information neural network. During identification, measured hyperspectral data of the code points to be tested are collected. Combined with environmental parameters and historical data, the expected state is predicted using the trained physical information neural network. The authenticity is determined by comparing the measured data with the expected state. This invention embeds physical laws into the identification process through a digital twin model and a physical information neural network, achieving proactive prediction of the evolution of the microscopic stealth code state, significantly improving the accuracy, robustness, and anti-counterfeiting capability of anti-counterfeiting identification.

The invention belongs to the technical field of ceramic decorative materials and photochromism, and provides a photochromic dynamic pattern design method for multilayer overprinting partition photosensitive ceramic stained paper aiming at the industrial pain points that patterns of traditional ceramic stained paper are fixed, and existing photochromic stained paper is low in overprinting precision, slow in color change response and the like. According to the method, a five-layer composite structure is constructed and sequentially comprises a ceramic substrate layer, a bottom bonding layer, a photochromic functional layer, a partitioned photosensitive control layer and a surface protection layer, multi-region independent photochromism is achieved through the partitioned photosensitive control technology, and the overprinting precision can reach within 5 microns. The photochromic response time of the product does not exceed 0.5 second, the cycle discoloration life is not less than 150 thousand times, the interlayer peeling strength reaches 3N / cm or above, the product can be widely applied to the field of architectural ceramic and domestic ceramic decoration, and the visual expressive force and interactive experience of the product are effectively improved.

The utility model relates to the technical field of lenses, in particular to a spherical lens and cylindrical lens double-control fusion lens, which comprises a lens body and is characterized in that the lens body comprises a base layer I, and an anti-reflection layer, an ultraviolet-proof layer, an impact-resistant layer, a photochromic layer and a stain-resistant layer are arranged on the surface of the lens body. An anti-reflection layer is fixedly adhered to one side of the base layer I through a resin adhesive, and an ultraviolet-proof layer is adhered to the other side of the anti-reflection layer through the resin adhesive. According to the scheme, the functionality is remarkably improved through the multi-layer composite structure design (the anti-reflection layer, the ultraviolet-proof layer, the anti-impact layer and the like), in addition, the micro lenses of the first base layer and the second base layer are distributed in a staggered mode by rotating by 30 degrees, the one-person two-mirror alternate wearing mechanism (alternating every 2-4 weeks) is combined, fatigue of retina cells caused by fixed stimulation is avoided through dynamic out-of-focus stimulation, and the anti-fatigue performance of the retina cells is improved. Meanwhile, alternate recovery is promoted, so that myopia development is intervened more scientifically.

The invention relates to the technical field of organic synthesis, and particularly provides a thiophene-containing tetraarylethene compound as well as a preparation method and application thereof. According to the invention, two phenyl groups of tetraphenylethylene are replaced by methyl formate thiophene groups, and the substituted tetraarylethylene compound has more remarkable photochromic and mechanochromic dual functions through the interaction of a specific substituent group at the position 2 of thiophene and a large conjugated group formed by four aromatic rings; and light-operated double-color display in a polymer mechanism can be realized. The mechanochromism of the compound does not depend on ultraviolet light, when the compound is subjected to mechanical force, the molecular accumulation mode and conjugate planarity are changed, and the color change can be directly observed by naked eyes. Different from traditional tetraphenyl ethylene force-induced discoloration recessive fluorescence change, the dominant color change can be used in the fields of visual stress monitoring, anti-counterfeiting marks, inkless writing materials, safe ink and the like in ultraviolet-free environments (such as indoor and closed spaces), and the application prospect is wide.

The invention discloses a lithium ion battery negative electrode material with a photochromic characteristic and a preparation method thereof. The molecular formula of the lithium ion battery negative electrode material with the photochromic characteristic is MVMo9O28. Wherein MV is a methyl viologen cation; according to the lithium ion battery negative electrode material with the photochromic characteristic, electron transfer from oxygen atoms to molybdenum atoms occurs under ultraviolet irradiation, and a two-year super-stable charge separation state is formed along with color change of crystals from colorless to blue; when the lithium ion battery negative electrode material with the photochromic characteristic is used as the lithium ion battery negative electrode material, the specific capacity of the battery can be improved in a colored state compared with an initial state; a new strategy is provided for developing a high-performance lithium ion battery negative electrode material, and the ever-increasing energy storage requirement is expected to be met.

This invention discloses a polishing method and apparatus for nickel-based alloys based on photocatalysis and photothickening synergy. It achieves dual-driven processing by simultaneously triggering photocatalytic workpiece surface modification and photo-triggered thickening of the polishing slurry through an integrated dual-light system, realizing surface softening and medium thickening. Composite abrasive particles loaded with TiO2 / ZnO photocatalysts form a low-hardness oxide layer on the nickel-based alloy surface under ultraviolet light irradiation, reducing processing resistance. Precise viscosity control of the polishing slurry is achieved through azobenzene / cinnamic acid photochromic molecules, combined with shear-induced particle agglomeration to form a dual thickening system, improving viscosity stability. This invention solves the technical pain points of work hardening in nickel-based alloys, large viscosity fluctuations in traditional shear-thickening polishing slurries, and poor processing uniformity, improving processing efficiency and workpiece surface quality. It is suitable for efficient and precise machining of difficult-to-machine nickel-based alloys such as Inconel 718 and GH4169.

The present disclosure provides: a curable composition capable of realizing a cured body that achieves photochromic compound performance and photochromic compound elution resistance; a cured body; a laminate; a lens; spectacles; and a photochromic optical article. A curable composition according to an embodiment includes a photochromic compound and a radically polymerizable monomer. The photochromic compound has a radically polymerizable substituent. The polymerizable monomer includes, in the amount of 50 mass% or more, a first (meth)acrylate that has a number average molecular weight of 600 or more and that comprises a polyalkylene glycol chain structure having a number average molecular weight of 250 or more and two or more (meth)acryloyl groups.

The present invention relates to, a curable photochromic composition that includes: (a) a photochromic compound; (b) a polyisocyanate including at least two isocyanate groups; and (c) a reactive component having at least two reactive groups that are each reactive with the isocyanate groups of the polyisocyanate. Each reactive group of the reactive component is independently selected from primary amine and imine, provided that at least one reactive group of the reactive component is selected from imine. The curable photochromic composition further includes (d) a non-reactive component that is free of functional groups that are reactive with the polyisocyanate and said reactive component. The present invention also relates to an article that includes: a substrate; and a photochromic layer over at least one surface of the substrate, where the photochromic layer is formed from the curable photochromic composition of the present invention.