22 results about "Photodegradation" patented technology

The application relates to a light-degradation-driven high-molecular nanomotor and a preparation method, and aims to solve the environmental pollution and biological safety problems caused by the degradation difficulty or long cycle of the nanomotor power assembly. The nanomotor has an asymmetric nanostructure and is assembled by a light-degradation high-molecular assembly and a biocompatible high-molecular effective load in a nanometer scale. The preparation method comprises the following steps: 1. uniformly mixing a light-degradation high-molecule and a biocompatible high-molecule in an organic solvent to prepare a mixture A; 2. mixing the mixture A and water at a high speed to prepare a mixture B; and 3. removing the organic solvent to prepare the nanomotor. Under light, the light-degradation assembly absorbs light energy to degrade and generate bubbles, which push the nanomotor to move in the solution. The start / stop of the nanomotor is controlled by the on / off of the light source, and the fast / slow movement of the nanomotor is controlled by the strong / weak of the light source. The structure of the light-degradation assembly is gradually degraded and finally completely destructed with the reaction, so that the biological safety and environmental pollution problems of the nanomaterial are relieved.

The application belongs to the technical field of environmental material synthesis, and particularly relates to a method for synthesizing a composite film by means of NMP-induced surface self-corrosion assisted rapid spin coating and application thereof; the steps are as follows: firstly, PDI and PEDOT are prepared, then a photocatalyst is prepared by means of a microwave method and a surface imprinting technology, and then the photocatalyst is embedded in surface pores of a PVDF film by means of NMP-induced surface self-corrosion assisted rapid spin coating to prepare an imprinting composite film with high stability and high permeability; the imprinting PDI / PEDOT photocatalyst is firmly embedded in the surface pores of the PVDF film, the stability is effectively improved, and a high water flux and a high light degradation activity are maintained. In addition, the construction of a heterojunction structure and the existence of imprinting cavities endow the imprinting composite film with good self-cleaning performance, photocatalytic performance and significant selectivity, and the imprinting composite film has a wide application prospect.

This invention discloses a method for preparing avermectin nanoparticles supported on zein-sodium lignin sulfonate, and its applications. The preparation method involves dissolving avermectin and zein in an organic solvent to form a solution (stream 1), and dissolving sodium lignin sulfonate or modified sodium lignin sulfonate in deionized water to form a solution (stream 2). Both streams are simultaneously injected into a dual-channel confined counter-current mixer for rapid mixing. The resulting nanoparticle suspension is then collected, completing the preparation process. This invention utilizes the compatibility of hydrophobic zein with avermectin, combined with the self-assembly properties of zein and the use of sodium lignin sulfonate or modified sodium lignin sulfonate as a stabilizer, to prepare avermectin nanoparticles with high drug encapsulation efficiency and excellent drug release performance. Furthermore, these nanoparticles exhibit excellent resistance to UV photodegradation, effectively reducing the photodegradation of avermectin. The method is simple, rapid, and easy to control.

The beverage contains an anthocyanin. A copper ion is blended into the beverage containing the anthocyanin. When a copper ion content is “B” ppm and an anthocyanin content is “A” ppm, a ratio of B / A, is adjusted to 0.000003 or more. It was found that an effect of photodegradation of the anthocyanin can be suppressed.

The present application provides a kind of microcapsule aqueous dispersion and preparation method and its application in water-based photosensitive solder resist ink.The microcapsule aqueous dispersion is shell-core structure, the core material of the microcapsule aqueous dispersion is water-soluble basic epoxy acrylate resin, the wall material of the microcapsule aqueous dispersion is ultraviolet light degradable resin, and the ultraviolet light degradable resin is selected from urea-formaldehyde resin or melamine-formaldehyde resin.Microcapsule aqueous dispersion is configured into water-based photosensitive solder resist ink with conventional water-based alkali-soluble epoxy acrylate resin, hydrophilic multifunctional acrylate reactive diluent, photoinitiator, auxiliary agent and water.This application realizes the physical isolation and light-controlled release of basic active component through microcapsule technology, fundamentally solves the poor long-term storage stability of traditional water-based solder resist ink, the poor pattern accuracy caused by uneven volatilization of amine neutralizer, and the contradiction between alkali-soluble requirement and chemical resistance.

The application discloses a kind of self-cleaning quick-drying type paint and its preparation method, application, belong to paint technical field.The modified acrylic resin is used with epoxy resin in the application, which helps to improve the adhesion and chemical resistance of the coating film, adding modified filler and composite antibacterial agent, multiple mechanisms give coating excellent self-cleaning ability.In addition, the modified acrylic resin in the application adds ultraviolet absorber, which can effectively absorb ultraviolet rays and slow down the photodegradation of the resin.The nano cerium dioxide in the modified filler also has excellent ultraviolet shielding function, and the components work together to help provide the weather resistance of the coating film, prevent yellowing, powdering and loss of luster, and prolong the service life of the coating.Overall, the paint has the advantages of quick drying, self-cleaning, high weather resistance and strong adhesion, and when applied in automotive repair coating, it can significantly improve the construction efficiency and surface easy cleanability of the automotive repair coating film, reducing the subsequent maintenance cost.

The application discloses an in-situ polymerization-based proton exchange membrane integrated bidirectional gradient porous gas diffusion layer and a manufacturing method thereof, and belongs to the technical field of fuel cells. In the prior art, the interlayer contact loss of the proton exchange membrane is high, the pore distribution is single, and the process is complicated. In the method, photodegradable polymer microspheres PLA-PEG, NaCl crystals, aniline monomers and graphene are dissolved in an N-methyl pyrrolidone solution, and after being mixed sufficiently, a gas diffusion layer coating is obtained; the gas diffusion layer coating is scraped on the surface of a proton exchange membrane substrate; the gas diffusion layer coating on the surface of the proton exchange membrane substrate is irradiated with ultraviolet light; and template removal and activation work are performed on the surface of the proton exchange membrane semi-finished product. The method has the advantages that the porous layer has the functions of a gas diffusion layer and a micro-reaction interface, realizes the triple optimization of gas transmission, electron conduction and water management, and is suitable for high-power-density fuel cell systems.

The scheme discloses a yellowing-resistant holographic polymer dispersed liquid crystal composition, a holographic grating and a preparation method, simultaneously introduces a yellowing-resistant acrylate monomer containing siloxane and a specific type of yellowing-resistant additive, the bond energy of a siloxane bond (Si-O-Si) of the yellowing-resistant acrylate monomer containing siloxane is high, is more resistant to ultraviolet light degradation than common carbon-carbon bonds and carbon-oxygen bonds, can enhance the overall stability of a polymer network, can reduce the surface energy of the polymer, increase the hydrophobicity and improve the flexibility, is beneficial to subsequent mass production, can also provide better action sites for the yellowing-resistant additive, the yellowing-resistant additive can effectively absorb the invading ultraviolet photons, convert the ultraviolet photons into harmless heat energy, quench free radicals and interrupt the chain growth of photo-oxidation reaction, the yellowing-resistant additive and the yellowing-resistant acrylate monomer containing siloxane synergistically act to provide internal and external double protection for the composite material, and the yellowing-resistant performance of the composite material is greatly improved.

The application belongs to the technical field of photodegradable polymers, and discloses a light-responsive degradable polymer and a preparation method thereof. The method comprises the following steps: performing an ene-yne metathesis reaction on monomers containing a photodegradable group, or performing a reaction on monomers containing a photodegradable group and ene-yne monomers without a light-responsive fragment through block copolymerization or random copolymerization to obtain the light-responsive degradable polymer; and the monomers containing the photodegradable group are acyclic strain monomers. The application successfully obtains a light-responsive degradable polymer with a relatively high molecular weight and controllable polymerization effect through ene-yne cascade metathesis reaction, and the method has good effects.

This invention discloses a composition for inhibiting the photodegradation of ergothioneine based on glucosyl hesperidin, comprising glucosyl hesperidin and ergothioneine, wherein the weight ratio of glucosyl hesperidin to ergothioneine is 0.1-2.5:0.001-1, and wherein the content of glucosyl hesperidin in the composition is 0.001-3 wt%. This invention also discloses the application of glucosyl hesperidin in inhibiting the photodegradation of ergothioneine, the antioxidant use of the composition based on glucosyl hesperidin and ergothioneine, and the application of this composition in topical skin preparations.

The application discloses a kind of photodegradation device and photodegradation method of containing pesticide sewage, including the sewage introduction system connected in turn, atomization unit, atomization unit bottom is equipped with water collecting pipe, water collecting pipe is connected with water body collection chamber;The atomization unit is equipped with atomization droplet reaction chamber, top is equipped with light source installation chamber, is equipped with reflection enhancement device on outer wall;Atomization droplet reaction chamber and reflection enhancement device are equipped with circulation temperature control water bath interlayer between;Photodegradation device is used in series or parallel, and the photodegradation treatment of containing pesticide sewage is carried out.The degradation characteristics of the atomization droplet itself is strengthened in the application, and specific wavelength light source is matched to irradiate, and the photodegradation efficiency of polluted water body can be improved without relying on photocatalyst, and the problems of secondary pollution, high cost, complex operation and potential biological toxicity existing in the current ultrasonic atomization photodegradation technology using photocatalyst are solved.

This utility model relates to the field of medical testing equipment technology and provides an immunoassay substrate supply device, comprising: an immunoassay substrate solution storage container; a micropump, the input end of which is connected to the storage container; a supply tube assembly, connected to the output end of the micropump via a first tube body; the supply tube assembly includes a three-way valve, an electrochromic glass temporary storage tube, and a detection substrate solution output nozzle; the first end of the three-way valve is connected to the first tube body, the second end is connected to the electrochromic glass temporary storage tube, and the third end is connected to the second tube body; the detection substrate solution output nozzle is located at the end of the electrochromic glass temporary storage tube; the second tube body is connected to an external inert gas supply device for injecting inert gas into the temporary storage tube to drive the substrate solution output. This utility model can avoid substrate solution inactivation upon contact with oxygen, while simultaneously filling the detection container with inert gas to create an anaerobic environment, thus solving the problems of photodegradation, oxidative inactivation, and microbial contamination of immunoassay substrate solution during the supply process.

This invention discloses a composition based on glycyrrhizin for inhibiting the photodegradation of ergothioneine, comprising glycyrrhizin and ergothioneine in a weight ratio of 0.5-5:1-8, wherein the content of glycyrrhizin in the composition is 0.05-0.5 wt%. This invention also discloses the application of glycyrrhizin in inhibiting the photodegradation of ergothioneine, the antioxidant or anti-glycation use of the composition based on glycyrrhizin and ergothioneine, and the application of this composition in topical skin preparations.

This invention relates to a method for assessing the efficiency of Arctic marine biological carbon pumps and providing early warning of carbon sink depletion, falling under the field of data processing and analysis technology, including acquiring target data sources. The invention improves the resolution of estuaries and erosion hotspots by employing adaptive grid refinement, enhancing the characterization accuracy of terrestrial material diffusion processes while reducing computational resource consumption. It establishes a multi-level degradation parameterization of organic matter, distinguishing between active, semi-active, and inert organic matter. The invention introduces excitation effects and ultraviolet light degradation modules, reducing the systematic bias in remineralization rate estimation and increasing the additional degradation contribution from excitation effects in the shelf region. Furthermore, it employs a nonlinear depth-adaptive remineralization parameterization, using a hyperbolic tangent threshold function and an exponential saturation function to respond to temperature and organic matter quality, capturing the nonlinear jump in remineralization rate after Arctic temperatures cross the freezing point threshold, thus reducing the prediction error of deep carbon sequestration efficiency.

The application belongs to the technical field of photocatalytic materials, and relates to a high-efficiency BiOBr / Ni3S4 composite photocatalytic material, a preparation method thereof and a photodegradation application.The BiOBr / Ni3S4 composite photocatalytic material is a photocatalytic composite formed by introducing Ni3S4 into BiOBr as a main body to form a nanobundle morphology.The nanobundle structure BiOBr / Ni3S4 composite photocatalytic material has a high specific surface area, greatly increases the number of surface active sites, is beneficial to rapid photocatalytic reaction, and has good photocatalytic activity.

An optical ferrule assembly includes an optical ferrule including an attachment area, a light input surface and a light output surface; an optical fiber having a fiber end where the light input surface and the fiber end defines a gap therebetween substantially filled with an adhesive, such that light propagating along the optical fiber and having a peak intensity I1≥3 GW / m2, exits the fiber end and enters the optical ferrule through the light input surface after traversing the gap through the adhesive, and exits the optical ferrule through the light output surface. The exiting light has a first beam size, such that after at least 100 hours of aging of the optical ferrule assembly, any change in the first beam size due to a photodegradation of the adhesive is no more than about 10%. The adhesive can be prepared by photocuring an optical adhesive formulation.

The application discloses a degradable polyethylene master batch, a preparation method and degradable linear low-density polyethylene. The degradable polyethylene master batch comprises the following components: 100 parts of LLDPE, 1.5-5 parts of an antioxidant, 0.5-3 parts of an acid absorbent, 25-35 parts of starch, 0.4-1.0 parts of a photosensitizer, 10-20 parts of an anti-aging modifier, 2-4 parts of a starch plasticizer and 8-15 parts of a modified filler. The anti-aging modifier is prepared by melt blending of maleic anhydride grafted polyolefin and amine-terminated polyamide at a mass ratio of 10:3-4, and the amine-terminated polyamide is obtained by polycondensation of bipyridine diacid and aromatic diamine at a molar ratio of 1:1.1-1.3. The application can effectively solve the problem of light aging of the current degradable polyethylene material during use, and reduce the negative influence of the antioxidant on the light degradation efficiency.

The application belongs to the technical field of biological medicine, and provides application of ferulic acid in preparation of a photolysis inhibitor of tigecycline and minocycline. The ferulic acid can significantly inhibit degradation of tigecycline or minocycline under light conditions, and further enhance the antibacterial activity of tigecycline or minocycline under light conditions. Compared with the treatment of tigecycline alone, the addition of ferulic acid can significantly enhance the treatment effect of tigecycline or minocycline as an external medicine on skin or soft tissue infection, effectively expand the drug dosage form of tigecycline or minocycline, and provide a safer and more reliable drug preparation for the treatment of complex drug-resistant pathogenic bacterial skin or soft tissue infection.

A flexible display module, a manufacturing method therefor, an adhesive and a flexible display apparatus. The flexible display module (10) comprises a flexible display panel (1) and an adhesive layer group (2); the flexible display panel (1) has a non-edge area (11) and an edge area (12) surrounding the non-edge area (11); the adhesive layer group (2) is arranged on a display side of the flexible display panel (1), and the adhesive layer group (2) comprises a first portion (21) and a second portion (22), the first portion (21) being at least arranged in the non-edge area(11), and the second portion (22) being arranged in the edge area(12); the adhesive layer group (2) comprises an adhesive, the adhesive comprising a photo-degradable cross-linking agent and / or a thermo-degradable cross-linking agent; the second portion (22) is configured such that under the action of light and / or heat, the storage modulus of the second portion (22) is less than the storage modulus of the first portion (21) and / or the cross-linking density of the second portion (22) is less than the cross-linking density of the first portion (21).