45results about How to "Good light stability" patented technology

The invention relates to the technical field of nano materials and biomedical engineering, and discloses a dye-sensitized rare earth up-conversion luminescent nano material as well as a preparation method and application thereof. The dye-sensitized rare earth up-conversion luminescent nano-material comprises a rare earth doped up-conversion nano-particle core, an unsaturated fatty acid salt self-assembled shell layer and a near-infrared dye modified on the surface of the rare earth doped up-conversion nano-particle. The unsaturated fatty acid salt coating layer endows the material with excellent water dispersibility through a hydrophilic group; a hydrophobic chain segment and an unsaturated double bond can effectively block water and oxygen permeation and quench singlet oxygen, so that the photobleaching half-life period of the material is increased by 86.7 times or more compared with that of a conventional coating material, and the light stability is excellent; the material successfully realizes efficient up-conversion luminescence under excitation of a low-power near-infrared light emitting diode (NIR LED, the power density of which can be as low as 100mW / cm < 2 >), and thoroughly gets rid of dependence on a high-cost and high-risk laser.

The invention discloses a composition with an anti-aging effect and a preparation method and application thereof, and belongs to the technical field of cosmetics. The composition is prepared by compounding a traditional Chinese medicine active component, a moisturizing and permeation promoting component and a repairing and anti-aging auxiliary component, and the traditional Chinese medicine active component is composed of three zymolytes and three fermentation extracts which are respectively prepared from six medicinal and edible traditional Chinese medicine raw materials through differentiated composite enzymolysis and probiotic anaerobic fermentation processes. The problems that traditional Chinese medicine extracts are low in transdermal absorption rate, poor in bioavailability and insufficient in cosmetic system stability are solved, active ingredients are small-molecularized through process optimization, a multi-target synergistic anti-aging system is formed by matching with functional components, the anti-aging and repairing composition has excellent anti-aging and repairing effects, physical and chemical stability and skin safety, and the anti-aging and repairing composition has a good application prospect. The composition is suitable for various skin types and can be widely applied to preparation of anti-aging repair cosmetics.

This application relates to the biomedical field and discloses a method for preparing a type I composite photosensitizer with both hydrogen sulfide detection capabilities and its uses. The invention synthesizes a triphenylamine derivative TPAB with an A-π-D-π-A conjugated structure using TPA-CHO and MN as monomers via a Schiff base reaction, and further incorporates Cu... 2+ By introducing TPAB molecules, a stable metal complex photosensitizer is formed through coordination bonds. This application presents the functional composite photosensitizer TPAB-Cu. 2+ Characterized primarily by the generation of type I ROS, it exhibits highly efficient photodynamic bactericidal activity in hypoxic environments infected with drug-resistant bacteria. Furthermore, this functional molecule can be used to detect hydrogen sulfide levels in the microenvironment of drug-resistant bacterial infections, enabling early warning and real-time monitoring of the treatment process. This solves the technical problems of strong oxygen dependence of photosensitizers and insufficient sensitivity and specificity in response to the microenvironment of drug-resistant bacterial infections in existing photodynamic therapies.

The utility model provides an ultra-high molecular weight polyethylene powder additive adding device which comprises an exhaust fan, an additive feeding hopper, an additive storage bin, a weightlessness scale and a powder rotary valve, a powder additive is added through a feeding port in the upper portion of the additive feeding hopper, and an exhaust port is formed in the top of the additive feeding hopper. An exhaust fan is arranged on the side of the additive feeding hopper, the exhaust fan is started during feeding so as to prevent the powder additive from flying out, and extracted gas is exhausted through the exhaust fan; the powder additive flows into the additive storage bin through a pipeline at the bottom of the additive feeding hopper by virtue of gravity; a powder additive enters a powder weightlessness scale through a pipeline at the bottom of the additive storage bin, the adding amount of the powder additive is measured through the powder weightlessness scale, and the powder additive is conveyed to a rotary valve through a discharging screw. The powder additive is added into an ultra-high molecular weight polyethylene powder air conveying system pipeline from the bottom of the rotary valve, and it is guaranteed that the powder additive and the ultra-high molecular weight polyethylene powder are fully mixed.

This invention belongs to the field of biodetection technology, specifically relating to a method for preparing and applying a fluorescent probe for screening monoamine oxidase B inhibitors. The method for preparing the fluorescent probe described in this invention is simple, convenient, and low in synthesis cost. The fluorescent probe prepared using this method exhibits good specificity and high sensitivity. The probe has a large fluorescence emission wavelength, which can effectively avoid fluorescence interference from chemical components in traditional Chinese medicine, thereby improving detection sensitivity. It shows promising application prospects in the screening of monoamine oxidase B inhibitors from traditional Chinese medicine.

This invention provides a wide-bandgap perovskite thin film, a perovskite tandem solar cell, and a method for preparing the same, relating to the field of photovoltaic technology. The method for preparing the perovskite thin film includes: adding a perovskite structural material and an organic additive to an organic solvent to obtain a perovskite precursor solution; spin-coating the perovskite precursor solution onto a substrate; and annealing the substrate to obtain the perovskite thin film. The organic additive includes a material containing a thiophene dioxide framework. The organic additive used in this invention can effectively regulate the crystallization rate of mixed halides, delay crystallization, enhance the uniform distribution of the mixed halide phase, reduce the defect density in the wide-bandgap perovskite thin film, and significantly improve the power conversion efficiency and stability of the solar cell, thereby obtaining a high-performance tandem solar cell.

The invention discloses preparation and application of a multicolor nano fluorescent probe based on fluorescent micromolecules FRET, belongs to the technical field of medical reagents, and particularly relates to a preparation method of the nano fluorescent probe. Then adding an organic reagent and a siloxane precursor to prepare an organic phase solution, adding the organic phase solution into an alkaline water phase system to form nano particles, and finally coating the outer layer with silicon dioxide to prepare the nano fluorescent probe. The use volume ratio of the donor fluorescent small molecule solution to the receptor fluorescent small molecule solution is (0.5-1): (0-25). According to the invention, donor fluorescent micromolecules are HMAT blue fluorescent micromolecules, and receptor fluorescent micromolecules comprise BODIPY488 or Nile red.

A method for preparing white stable lignin and its application are disclosed. This invention addresses the limitations of existing lignin decolorization processes, which are constrained by long decolorization times and difficulty in maintaining color stability under ultraviolet light stimulation after decolorization, thus failing to meet the low absorption requirements of radiative cooling materials in the visible light band. The method includes: 1. Preparation of DES; 2. Preparation of lignin solution; 3. Modification of lignin; 4. Bleaching; 5. Preparation of white stable lignin. Application: It is used in the preparation of refrigeration materials.

This invention relates to photodynamic therapy, specifically to a class of quinoxaline-fused dihydroporphyrin compounds and their application as photosensitizers in photodynamic therapy. The compounds are those shown in formula (I) and their medically acceptable salts. These compounds have a good soft tissue phototherapy window and can generate singlet oxygen with extremely high quantum yield under light irradiation, making them suitable for photodynamic therapy of deep pathological tissues. They exhibit excellent photodynamic therapy performance and have promising prospects for photodynamic application development.

This application discloses a bipolar molecularly co-modified perovskite nanocrystal and its preparation method. After nucleation of CsPbBr3 nanocrystals, zinc bromide and 1-naphthalenesulfonic acid (NSA) are introduced for post-treatment, resulting in dual passivation and physical coating of defect states on the nanocrystal surface. Zinc bromide provides excess Br. ‑ Zn fills surface halogen vacancies. 2+ Occupy Pb 2+ Vacancy suppression of deep-level defects; NSA's sulfonic acid group -SO3 ‑ As strong coordination sites, they replace and firmly anchor weakly bound oleic acid / oleylamine ligands to the surface, and their aromatic ring structure stabilizes the surface through cation-π interactions. Zinc bromide and NSA work synergistically to achieve efficient and deep passivation of surface defect states of CsPbBr3 nanocrystals. Perovskite nanocrystals exhibit high photoluminescence quantum yield, narrow fluorescence peak, and uniform size distribution, and are stably dispersed in organic solvents for a long time. The ligands on the nanocrystal surface are firmly bound, improving optical and structural stability, and the process is simple and efficient.

The invention provides PBAT (poly (butyleneadipate-co-terephthalate)) with light stability and a preparation method thereof. The preparation method comprises the following steps: carrying out esterification reaction on terephthalic acid, butanediol, adipic acid and a light stabilizer serving as raw materials to obtain an esterification product system; and carrying out condensation polymerization on the esterification product system to obtain PBAT with light stability. The light stabilizer is connected to a main chain of PBAT molecules in a chemical bond combination mode through chemical reaction, molecular chain functionalization is conducted on PBAT, good light stability is given to PBAT, the problems that an additive light stabilizer is poor in compatibility, prone to volatilization, prone to surface migration and the like are effectively solved, then the light stability of PBAT is effectively improved, and the service life of PBAT is prolonged. And the device can be stably used outdoors for a long time.

The invention discloses a polyurea resin composition as well as a preparation method and application thereof. The polyurea resin composition comprises a component A and a component B. The component A comprises the following components in parts by mass: 20-55 parts of hydroxyl-terminated resin; 40 to 60 parts of isocyanate; 2-10 parts of a hydroxyl chain extender; 0.5-8 parts of a reactive ultraviolet absorbent; the component B is prepared from 30 to 70 parts of amino-terminated resin; 12 to 50 parts of an amino chain extender; 5-10 parts of a water removal agent; 0.2-4 parts of a reaction type hindered amine light stabilizer; and 0.1 to 0.5 part of a catalyst. The polyurea resin composition has excellent light stability, high mechanical strength and yellowing resistance, and the service life of a polyurea material is effectively prolonged.

This invention relates to the field of photocatalytic materials technology, specifically to a polybenzoxazine aerogel microsphere photocatalyst, its preparation method, and its application. The invention uses γ-aminopropylmethyldiethoxysilane, phenol, and paraformaldehyde as raw materials to synthesize benzoxazine with Si-O-C bonds and a planar π-conjugated structure. Then, the benzoxazine monomer undergoes ring-opening polymerization, followed by an in-situ emulsion template gelation method to form a polybenzoxazine aerogel microsphere catalyst with a wrinkled surface structure. The planar π-conjugated system and the interaction of tertiary amine groups in the polybenzoxazine aerogel microsphere catalyst promote the adsorption and activation of O2, as well as the gradual proton and electron transfer, thereby achieving highly efficient H2O2 photocatalytic synthesis. The preparation method of the polybenzoxazine aerogel microsphere catalyst of this invention is simple, the raw materials are readily available, and the cost is low.

The application provides a fluorescent probe compound for simultaneously detecting HClO and SO2 at double sites and synthesis and application thereof. The probe compound takes phenothiazine as a response group of HClO, expands the conjugated structure of phenothiazine, and introduces a response group of SO2 and an organelle positioning group on the near-infrared fluorescent skeleton, thereby constructing an endoplasmic reticulum-targeted fluorescent probe BQTPA for simultaneously detecting HClO and SO2. The probe can realize dual-channel simultaneous detection of HClO and SO2 through two completely separated emission channels (λem=598 nm and 448 nm), and exhibits excellent selectivity, high sensitivity (detection limits are 7.9 nM and 33.8 nM, respectively) and good light stability to the response of HClO and SO2. The probe is successfully used for monitoring the changes of exogenous and endogenous HClO and SO2 levels in cells, further reveals the dynamic changes of the two in the process of drug-induced liver injury and ferroptosis, and clarifies the role of ferroptosis in liver injury.

The present application relates to S ) -2-((3-((benzo[ d [1,3]dioxolane-5-oxomethyl)benzyl)-amino)propanamide, to pharmaceutical compositions containing it, and to the use of this crystalline form for the preparation of a medicament for the prevention and / or treatment of pain (e.g. neuropathic pain, including chronic neuropathic pain or neuropathological pain).

This invention discloses an aerogel protocellular material, its preparation method, and its applications. The preparation method includes: under the coexistence of acidic and alkaline catalysts, sequentially subjecting an aqueous solution of a silicon precursor containing bioenzymes and anionic polymers to acid hydrolysis and alkaline condensation reactions to obtain a silica sol; mixing this sol with an oil phase containing cationic compounds for emulsification; and then, through spontaneous film formation and sol-gel conversion, forming a hydrogel protocellular material. Finally, the material undergoes low-temperature solvent replacement and drying. This invention provides the first method to achieve in-situ enzyme immobilization and integration of cell-like structures within a material, realizing the dehydration stabilization of the protocellular system and the construction of aerogel protocellular materials, overcoming the limitation of existing protocellular construction technologies that cannot operate outside of an aqueous environment; furthermore, it endows the bioenzymes with excellent thermal stability, photostability, and resistance to electrical shock, solving the technical problem of easy inactivation of existing bioenzymes under extreme conditions.

This invention relates to the field of fiber technology and discloses an antibacterial and heat-insulating fiber based on thermal insulation materials and its preparation method. By surface-modifying inorganic antibacterial and heat-insulating hollow titanium dioxide microspheres with polythiophene and polybutadiene, an antibacterial and heat-insulating material with good antibacterial and heat-insulating properties is prepared. This material is then introduced into polypropylene chips along with a reactive quaternary ammonium salt antibacterial agent, methacryloyloxyethyltrimethylammonium chloride, and extruded via a melt reaction. The resulting fiber possesses both excellent heat insulation and long-lasting antibacterial properties, while also improving the fiber's comfort.

The invention relates to an ultraviolet-blue light absorbent as well as a preparation method and application thereof, the absorbent provided by the invention has strong absorption performance in ultraviolet and blue light regions, is good in high temperature resistance and weather resistance, can absorb high-energy ultraviolet light and blue light in protective films of glasses, mobile phones, televisions and the like, and plays a role in protecting eyesight. Meanwhile, the ultraviolet-blue light absorbent is simple in preparation method, short in production period and high in practicability, and is an environment-friendly absorbent with excellent application performance.

The application discloses a low-hairiness linen-imitating style clothing fabric and a preparation method thereof, and relates to the technical field of clothing fabrics. The clothing fabric is formed by interweaving first warp yarn, second warp yarn, first weft yarn and second weft yarn. The first warp yarn and the first weft yarn are core-spun yarns, the core-spun yarns comprise a core layer and a cladding layer, the core layer is spandex filament, and the cladding layer is a blend of polyester fiber and viscose fiber. The second warp yarn and the second weft yarn are two single yarns that are subjected to oiling treatment and twisted into a strand. The oiling treatment is performed by using modified oil agent. The clothing fabric prepared by the innovative double-yarn structure design and the modified oil agent technology has the natural texture of linen fabric and the delicate appearance of modern textile, the production process is stable, the rate of superior products is significantly improved, the double requirements of quality and functionality of linen-imitating fabric are met, and the clothing fabric has important industrial application value and market prospect.

The invention discloses photocatalyst fluorescent ink, and relates to the technical field of ink. According to the invention, the self-made fluorescent agent is frozen into microspheres, and titanium dioxide is adsorbed on the surface of the self-made fluorescent agent by using plasma, electrostatic spraying and microwaves, so that the stability of the ink is improved; then, through low-temperature plasma assisted radio frequency magnetron sputtering, cerium oxide is coordinated and chelated on the surfaces of the titanium dioxide microspheres, so that the visible light activity of titanium dioxide is improved, and ink can be catalytically degraded under visible light; wherein the self-made fluorescent agent is prepared from veratrone, pyrenecarboxaldehyde and boron trifluoride, so that the ink can display patterns only under infrared wavelength irradiation, is not easy to decompose by illumination under long-time infrared irradiation, and has better light stability. The photocatalyst fluorescent ink prepared by the invention has the effects of good confidentiality, light stability and degradability.

This invention relates to the field of composite panels and discloses a wear-resistant and UV-resistant fiberglass-silicon core composite panel and its preparation method. The composite panel comprises melamine-faced paper, fiberglass mat, and calcium silicate board impregnated with adhesive. The adhesive includes deionized water, melamine-formaldehyde resin, modified aluminum hydroxide, organosilicon flexibility agent, and coupling agent. The modified aluminum hydroxide is prepared by reacting a functional modifier, N,N'-bis-(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexanediamine with benzophenone derivatives and pyridylthiazole derivatives, with 3-chloropropyltriethoxysilane and grafted onto aluminum hydroxide. The organosilicon flexibility agent is prepared by modifying phenyl hydrogen-containing silicone oil with allyl polyoxyethylene ether and glycidyl methacrylate. This invention achieves an integrated structure of the panel, maintaining a surface free of blistering and cracking under complex environmental conditions, with the overall material intact and without delamination, and possessing good antibacterial, fire-resistant, and UV-resistant properties.

This invention relates to a fluorescence down-conversion-based ultraviolet-enhanced CMOS image sensor and its fabrication method, belonging to the field of ultraviolet photoelectric detection technology. The image sensor comprises a CMOS image sensor and a down-conversion nanomaterial layer. The down-conversion nanomaterial layer is a benzene thin film deposited on the image-sensitive surface of the CMOS image sensor; the benzene thin film of the fluorescence down-conversion material layer has a thickness of 290 nm. This invention utilizes a low-cost fluorescence down-conversion material to achieve ultraviolet-to-visible light conversion. The emitted visible light can be well matched with the spectral response peak of the CMOS image sensor, improving the CMOS image sensor's response capability in the ultraviolet band. The down-conversion material in this invention possesses high light conversion efficiency, excellent thermal and light stability, and excellent transmittance in the visible and infrared regions. The thin film prepared by thermal evaporation exhibits better uniformity.

This invention proposes a near-infrared II fluorescent conjugated organic small molecule, its preparation method, and its application, belonging to the field of bioimaging and therapy. The conjugated organic small molecule has a D-A-D structure, with the general formula R1 being a C4-C24 branched or straight chain. After being encapsulated into nanoparticles with an amphiphilic polymer, it can guide in vivo tumor type IPDT and PTT combined therapy under the synergistic diagnosis of PA and NIR-II fluorescence dual-modal imaging.

The application discloses a kind of nanodiagnosis and treatment materials based on water-soluble columnar aromatic hydrocarbon.The application designs and synthesizes a new type of columnar [5] aromatic hydrocarbon WP5, the columnar [5] aromatic hydrocarbon WP5 has water-soluble quality and contains rigid structure cavity macrocyclic molecule, can occur with porphyrin molecule host-guest complexation interaction.Using the water-soluble columnar [5] aromatic hydrocarbon WP5 and porphyrin guest molecule host-guest complexation, can realize cavity protection porphyrin compound inhibits the accumulation between porphyrin molecules, improves its stability and the ability of producing singlet oxygen, while enhancing fluorescence, and improve porphyrin compound light stability.

The invention relates to a method for improving the illumination stability of a perovskite solar cell, and the internal structure of the perovskite solar cell sequentially comprises a conductive substrate layer, a first transmission layer, a three-dimensional perovskite layer, a second transmission layer and a back electrode layer from the bottom to the top, and the first transmission layer is an electron transmission layer or a hole transmission layer. The second transmission layer is a hole transmission layer or an electron transmission layer, and the electron transmission layer and the hole transmission layer are correspondingly arranged at the upper part and the lower part of the three-dimensional perovskite layer respectively. The method for improving the illumination stability of the perovskite solar cell comprises the steps that a lower two-dimensional perovskite layer is prepared between a first transmission layer and a three-dimensional perovskite layer, an upper two-dimensional perovskite layer is prepared between the three-dimensional perovskite layer and a second transmission layer, and the preparation materials of the upper two-dimensional perovskite layer and the lower two-dimensional perovskite layer are alkali metal chloride, alkali metal chloride, alkali metal chloride, alkali metal chloride, alkali metal chloride and alkali metal chloride respectively. The alkali metal chloride is at least one of cesium chloride, potassium chloride, sodium chloride and rubidium chloride. According to the invention, the illumination stability of the perovskite solar cell is improved.

The application discloses a palmitoyl hydrochloride-indometacin pharmaceutical cocrystal as well as a preparation method and application thereof, and belongs to the technical field of pharmaceutical crystallization. 21 H 22 ClNO4]·[C 19 H 16 ClNO4]. The palmitoyl hydrochloride-indometacin pharmaceutical cocrystal is prepared by mixing palmitoyl hydrochloride hydrate and indometacin in a solvent system according to a molar ratio of 1:1 and through stirring treatment in a suspended state. The process flow is simple, the operation is convenient, and the cocrystal has a high yield. In a pH 6.8 simulated intestinal fluid medium, the dissolution rate of palmitoyl hydrochloride in the pharmaceutical cocrystal is obviously lower than that of pure palmitoyl hydrochloride, and the pharmaceutical cocrystal presents a sustained-release behavior. On the contrary, the dissolution rate of indometacin in the pharmaceutical cocrystal is obviously improved, which is beneficial to the improvement of the bioavailability of indometacin. The palmitoyl hydrochloride-indometacin pharmaceutical cocrystal also has good human colon cancer cell inhibition activity.

The invention relates to the technical field of light conversion materials, in particular to a quantum cutting material based on triplet-state ligand sensitized nanocrystals and a preparation method and application of the quantum cutting material. The quantum cutting material comprises a nanocrystal nucleus and a surface ligand layer, the nanocrystal nucleus is NaYF4 or NaGdF4, and Yb < 3 + > and Tb < 3 + > are doped; the surface ligand layer comprises a triplet state sensitization ligand capable of generating triplet state excitons through a reverse intersystem crossing process; the triplet-state sensitizing ligand is pyridine-2, 6-dicarboxylic acid, 1, 2, 4, 5-benzene tetracarboxylic acid or 1, 3, 5-benzene tricarboxylic acid, and a carboxylic acid group at the tail end of a molecule of the triplet-state sensitizing ligand and the Yb < 3 + > and the Tb < 3 + > on the surface of the nanocrystal nucleus form a coordinate bond; after the triplet state sensitizing ligand absorbs exciting light, generated triplet state exciton energy is transferred to the quantum cutting center. Powerful support is provided for solar cells, biological imaging devices, light-emitting devices and the like.

The invention discloses a light conversion microsphere with adjustable emission wavelength and high quantum yield, a preparation method and application. Maleic anhydride copolymer microspheres are prepared through a self-stabilization precipitation polymerization method; the invention relates to a light conversion microsphere with adjustable emission wavelength and high quantum yield. A maleic anhydride copolymer microsphere is subjected to amine treatment to prepare an aminated polymer microsphere. And inducing intramolecular cyclization of the microspheres through simple heat treatment to obtain the maleimide-based polymer microspheres with adjustable emission wavelength. And finally, blending the prepared microspheres with a polymer matrix to prepare the light conversion film. The light conversion microspheres have the advantages of high luminous efficiency, adjustable luminous wavelength and the like, and the prepared polymer composite film can convert harmful ultraviolet rays into blue light or red light beneficial to plant growth and development and is used in the field of agricultural light conversion films; the material can also be compounded to the surface of a solar cell, optimizes the solar spectrum, and converts high-energy ultraviolet rays into effective wave bands absorbed by the solar cell, thereby improving the energy conversion efficiency of the solar cell.

The application provides a viscosity-responsive luminescent probe, a preparation method and application. The luminescent probe has an ultra-sensitive viscosity response performance, and the viscosity response range thereof covers the viscosity change range of edible oil. After the luminescent probe is added into the edible oil, the fluorescence intensity has a high correlation with the content of the polar component in the edible oil. The change of the polar component of the edible oil is obtained by using the response of the luminescent probe to the viscosity change of the edible oil, so that the rapid and sensitive detection of the polarity of the frying oil is realized.

The invention relates to a liquid crystal composition and application thereof, is mainly applied to TFT liquid crystal display, and belongs to the technical field of liquid crystal display. The liquid crystal composition comprises the following components in percentage by mass: 1-30% of a liquid crystal compound as shown in a general formula I, 10-60% of a liquid crystal compound as shown in a general formula II and 10-70% of a liquid crystal compound as shown in a general formula III, and the sum of the mass percentages of the liquid crystal compound as shown in the general formula I and the liquid crystal compound as shown in the general formula II is 30-90%. The positive liquid crystal composition with large dielectric and low-voltage fast response characteristics has good light stability and thermal stability, is suitable for IPS and FFS type liquid crystal displays, and can effectively improve the liquid crystal displays.