1101 results about "Ultraviolet irradiation" patented technology

The invention belongs to the technical field of material and coating corrosion tests, and relates to a whole sea area atmospheric environment comprehensive simulation test system, which adopts an integrated structural design, and performs integrated coupling of various environmental test simulation capabilities on the basis of a single-function test box. The device has the test capabilities of metal material corrosion acceleration test, organic composite material and coating aging evaluation and the like, can simulate the global marine atmospheric environment and coupling of multiple factors such as air temperature, humidity, salt mist and ultraviolet irradiation, can perform comprehensive test evaluation on the whole-sea-area marine atmospheric environment of typical materials, avoids the problem of inconvenient operation of corrosion tests, and has a wide application prospect. The device can be used for corrosion and ultraviolet aging tests of conventional marine atmospheric environment corrosion media, polar regions, tropical regions and other extreme marine atmospheric environments, and material corrosion tests for simulating marine splash zones, tidal range zones and the like. The device is simple in structure and convenient to operate, and coupling of multiple factors of high and low temperature, humidity, salt mist, ultraviolet illumination and periodic infiltration can be achieved.

A manicure curing device capable of preventing excessive ultraviolet irradiation is provided, including a housing having an internal cavity, in which the internal cavity has an upper surface, a left surface, a right surface and a lateral opening for entry and exit of a target; a first light-emitting module disposed at a front end of the upper surface; a second light-emitting module disposed at a rear end of the upper surface; a first control part configured to control the first light-emitting module to emit light and the second light-emitting module not to emit light; and a second control part configured to control the second light-emitting module to emit light and the first light-emitting module not to emit light.

The invention discloses a polymer drug-loaded particle for targeted adhesion to an intestinal inflammation area and a preparation method and application thereof.The method includes the steps that degradable polymer drug-loaded particles are subjected to surface modification through polycations and then added into a monomer solution of an adhesion layer, particle surface in-situ polymerization is initiated through ultraviolet irradiation, and a PAN adhesion layer is formed; the adhesion layer modified polymer drug-loaded particles are obtained. Wherein the polycation is used as a middle layer, so that the PAN adhesion layer can be successfully modified. Carboxyl in the adhesion layer enables the particles to present negative charges, meanwhile, succinimide ester can react with amino naturally existing on the surface of inflammatory intestinal tissue to generate an amide covalent bond, and finally targeted adhesion of the intestinal inflammation part is achieved. According to the adhesion strategy, the PAN can be effectively applied to the micro-nano-scale drug-loaded particles so as to enhance the adhesion of the micro-nano-scale drug-loaded particles in an intestinal tract damaged area, and a brand new thought is provided for treating inflammatory intestinal tracts.

The invention provides a chemical bonding type rare earth light conversion film and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing a rare earth light conversion material, a photoinitiator and master batch resin, and extruding to obtain a rare earth light conversion master batch; and (2) mixing the rare earth light conversion master batch obtained in the step (1) with matrix resin, and extruding to obtain the chemical bonding type rare earth light conversion film, the molecular structure of the rare earth light conversion material contains unsaturated double bonds; in at least one of the step (1) and the step (2), the step of ultraviolet irradiation is further included after extrusion is finished. According to the preparation method, the chemical bonding type rare earth light conversion film is prevented from being prepared in a mode of firstly polymerizing and then coordinating or firstly coordinating and then polymerizing, the process is simple, the cost is low, the migration, agglomeration and overflow phenomena of the rare earth light conversion material in the light conversion film can be greatly reduced, the light conversion service life of the light conversion film can be greatly prolonged, and the aging resistance of the light conversion film can be greatly improved.

The invention belongs to the technical field of microbial mutagenesis, and particularly relates to a microbial mutagenesis breeding device and application thereof. The microorganism mutation breeding device comprises a cube structure and a transmission structure, the periphery of the cube structure is wrapped with a light-proof material, and an ultraviolet lamp is arranged in the cube structure; the transmission structure comprises a single sequencing area and a mutagenesis area, and the mutagenesis area is inserted into the cube structure through the insertion opening of the cube structure and is perpendicular to the ultraviolet lamp. Microorganisms can be singly sorted through the first horizontal spiral conveying pipeline in the single sorting area and conveyed to the second horizontal spiral conveying pipeline in the mutagenesis area, so that the time and the intensity of ultraviolet irradiation of the microorganisms are uniform, the mutagenesis fatality rate of the microorganisms is remarkably reduced, the forward mutation rate is remarkably increased, and the mutagenesis rate of the microorganisms is remarkably increased. Operation is simple, workload is small, and period is short. In addition, the microorganisms are treated by using a protective agent with specific composition before single sequencing, so that the mutation uniformity and the forward mutation rate can be further improved.

The invention discloses a hydroxyl-rich ruthenium / titanium dioxide catalyst as well as a preparation method and application thereof, and the preparation method comprises the following steps: step 1, loading a ruthenium precursor on a titanium dioxide carrier by adopting an impregnation method or a deposition-precipitation method, and drying and calcining to obtain a Ru / TiO2 catalyst; and step 2, placing the Ru / TiO2 catalyst in an atmosphere environment containing water vapor or forming a physical adsorption water film on the surface of the Ru / TiO2 catalyst, and performing ultraviolet irradiation treatment to obtain the Ru / TiO2 catalyst. According to the method, water is physically adsorbed through ultraviolet light dissociation, hydroxyl is directly generated on the surface of Ru / TiO2 in an in-situ mode, the method is easy to operate, complex liquid phase treatment is not needed, and the stability of the generated hydroxyl under the subsequent high-temperature gas-solid phase hydrogen-rich reaction condition is obviously superior to that of hydroxyl introduced through a traditional method. The stable hydroxyl enriched on the surface serves as an effective Lewis base site and cooperates with a Ru active site, adsorption and activation of CO2 molecules are remarkably promoted, and therefore the catalytic activity of the CO2 methanation reaction is greatly improved.

The invention relates to the technical field of battery solid electrolyte, in particular to a method for constructing polyethylene oxide-based composite solid electrolyte by sub-nanowires. According to the specific technical scheme, the method comprises the following steps: (1) sub-nanowire surface grafting modification: dispersing sub-nanowires in a weak polar solvent, then adding a sulfhydryl compound and a photoinitiator, and reacting for 4-10 hours under the conditions of ultraviolet irradiation and ice bath; and (2) construction of the composite solid electrolyte: dissolving polyethylene oxide, a lithium salt and the sub-nanowire modified in the step (1) in a polar solvent, uniformly stirring, casting to form a film, and drying at normal temperature. According to the invention, the problems of poor filler dispersity, low size matching degree, insufficient interfacial compatibility and the like in the traditional composite electrolyte are solved.

The utility model relates to the technical field of cable production, in particular to a cable ultraviolet irradiation device, which comprises an irradiation mechanism. The irradiation mechanism comprises a plurality of supports arranged in an array mode, a first cylinder body installed on the supports, a second cylinder body which is rotatably installed on the supports and located on one side of the first cylinder body, spraying pieces which are fixed to the inner wall of the first cylinder body in an annular array mode, and transmission pieces which are arranged on the outer side of the first cylinder body and communicate with the spraying pieces. The device comprises a first cylinder body, a second cylinder body, a transmission part mounted on the first cylinder body, a hot air part mounted on the outer side surface of the first cylinder body and communicated with the transmission part, ultraviolet lamps fixed on the inner wall of the second cylinder body in an annular array, a gear ring fixed on the outer side surface of the second cylinder body, and a driving part mounted on a bracket on one side and meshed with the gear ring, the stability of the first barrel and the second barrel is ensured, and the cable ultraviolet irradiation device has the advantages of being good in curing effect and high in practicability.

A biosynthesis method for preparing royal jelly acid and the use thereof in skin care, which belong to the technical field of genetic engineering and biosynthesis. The royal jelly acid is produced by means of fermentation on the basis of yeast engineering bacteria using a culture medium containing trans-2-decenoic acid. An assessment at both skin cell level and skin model level shows that royal jelly acid can promote the synthesis of stratum corneum lipids and ceramide on aging skin and repair the skin barrier; and also can promote the synthesis of mitochondria ATP and NADPH in skin fibroblasts, reduce the active oxygen content of mitochondria, improve mitochondrial dysfunctions, and inhibit apoptosis. Further experiments show that royal jelly acid can repair DNA damage of fibroblasts caused by ultraviolet irradiation, reduce telomere shortening caused by cell division and replication, and strengthen the protection of chromosomal terminal regions. The prepared royal jelly acid has wide application prospects in the development of functional skin care products for skin repairing, aging resisting, etc.

The invention relates to the technical field of polyamide cord fabrics, and particularly discloses a preparation method and application of a high-performance polyamide cord fabric. The preparation method comprises the following steps: S1, taking diethanol amine and formaldehyde, stirring, heating, vacuumizing under reduced pressure, cooling, adding 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and continuously stirring to obtain an intermediate; s2, taking the intermediate, triethylamine and acetone, cooling, adding triethylamine under the protection of nitrogen, uniformly stirring, dropwise adding a mixed solution of a composite cross-linking agent and acetone, stirring, and removing a solvent to obtain a heat-resistant modifier; s3, adding a heat stabilizer, a heat-resistant modifier and nylon particles into a mixed solvent, uniformly stirring, carrying out ultrasonic treatment under ultraviolet irradiation, and removing the solvent to prepare pretreated nylon particles; s4, carrying out melt spinning on the pretreated nylon particles and nylon particles to obtain high-performance nylon industrial yarns; and spinning to obtain the high-performance polyamide cord fabric.

The invention discloses a coating liquid and a photovoltaic front panel. The coating liquid comprises a component A and a component B, the component A comprises the following raw materials in parts by weight: 15-35 parts of fluorocarbon resin; 20 to 40 parts of acrylic resin; 1 to 10 parts of matting resin; 1 to 5 parts of an ultraviolet absorbent; the component B comprises a curing agent, and the curing agent comprises-NCO groups. Therefore, when the coating liquid disclosed by the invention is coated on the photovoltaic front panel, powdering of the photovoltaic front panel caused by long-term ultraviolet irradiation can be effectively resisted, and meanwhile, the coating also has excellent scratch resistance, light transmission and water vapor barrier rate.

The invention provides a method for increasing the yield of bacterial cellulose by utilizing low-dose ultraviolet radiation, and belongs to the field of microbial fermentation. The method comprises the following steps: inoculating a fermentation culture medium with a Taonella.mepensis seed solution, carrying out fermentation treatment, and carrying out ultraviolet radiation under set conditions in the fermentation process, so as to obtain a fermentation solution containing a bacterial cellulose membrane; and taking out the bacterial cellulose membrane in the fermentation liquor, and purifying the bacterial cellulose membrane to obtain the bacterial cellulose. On the basis of an HS culture medium formula, the ultraviolet irradiation time is regulated and controlled at the same time, so that the activity of cellulose synthesis related enzymes, such as the activity of UDP-glucose pyrophosphorylase and glucose phosphate mutase, is improved, the activity of glucose decomposition pathway related enzymes, such as pyruvate kinase and phosphofructokinase, is inhibited, and the activity of cellulose synthesis related enzymes is improved. The yield of the bacterial cellulose is further improved.

The invention provides a high-precision device and method capable of automatically adjusting the curing shape of UV glue, the high-precision device comprises an ultraviolet lamp module used for curing the UV glue, and a pitching adjusting mechanism and a front-back adjusting mechanism which are used for adjusting the ultraviolet lamp module, and a camera and an ultrasonic sensor are installed on the ultraviolet lamp module. The actual effect image of current ultraviolet irradiation is obtained through the camera, and the distance between the current grating and the irradiated object is measured through the ultrasonic sensor. The pitching adjusting mechanism is adjusted according to an image acquired by the camera, so that ultraviolet rays emitted by the ultraviolet lamp module are accurately irradiated to a UV glue part, needing to be cured, of an irradiated object; besides, the brightest position of each stripe in the image is identified, the distance x between the brightest positions of the adjacent stripes is calculated, the actually measured distance x is compared with the calculated theoretical distance, and the distance between the irradiated object and the grating is adjusted through a front-back adjusting mechanism, so that the consistency of the irradiated object and the grating is ensured, and the accuracy of the adjustment is verified.

The invention discloses a preparation method of a 3MDT dimming film and application of the 3MDT dimming film to automobile glass, and relates to the technical field of dimming films. The preparation method of the 3MDT dimming thin film comprises the following steps: uniformly mixing isobornyl acrylate, a cross-linking agent and a photoinitiator, adding a functional filler, stirring and uniformly mixing, adding micromolecular nematic liquid crystal, and stirring to obtain a liquid crystal composite system; injecting the liquid crystal composite system into a liquid crystal box, and performing ultraviolet irradiation to obtain an interlayer film; two PET plastic films serve as substrates, the inner surfaces of the substrates are coated with ITO conductive coatings, the interlayer film is arranged between the two substrates, and the 3MDT dimming film is obtained. The prepared 3MDT dimming film has good heat insulation performance and mechanical performance, the interlayer film of the 3MDT dimming film has excellent hydrophobic performance, and the 3MDT dimming film is suitable for being applied to the aspect of automobile glass.

The invention discloses a dental plaque display type anti-caries invisible appliance based on synergism of iron-based nano-enzyme catalysis and traditional Chinese medicine caries inhibition, and belongs to the field of oral medical instruments. The preparation method of the appliance diaphragm comprises the following steps: preparing a composite material with the functions of catalytically degrading a bacterial biofilm matrix barrier and killing internal bacteria from polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol (PETG) and a Fe3O4 nano-enzyme filler in a solution blending manner; and after the composite material is subjected to thermoplastic molding, a layer of molecularly imprinted polymer (MIP)-spiropyrane and chitosan-magnolol are coated with the fluorescent display agent which is prepared by mixing the molecularly imprinted polymer (MIP)-spiropyrane and the chitosan-magnolol. The iron-based nano-enzyme can catalytically degrade a bacterial biofilm matrix barrier and kill internal bacteria, and the MIP-spiropyrane fluorescent display agent can specifically display the accumulation condition of cariogenic bacterial plaque in the oral cavity under ultraviolet irradiation. The invisible orthodontic appliance can reduce or prevent caries while having the same orthodontic effect as other orthodontic appliances in the market.

The invention discloses an accelerated aging test system and method for a high-density polyethylene buried pipeline, and the system comprises a box body which is internally provided with a test chamber for an aging test; a plurality of buried pipeline test pieces are arranged in the test chamber in a drawable manner through the test piece dismounting and mounting system; the in-pipe pressurization system is used for carrying out gas pressurization on the plurality of buried pipeline test pieces; the water bath system is used for injecting water into the test chamber to provide a water bath environment; the high-temperature system is used for heating the environment temperature in the test chamber or is matched with the water bath system to provide water bath environments with different temperatures for the plurality of buried pipeline test pieces; the ultraviolet irradiation system is used for performing ultraviolet irradiation on the plurality of buried pipeline test pieces; and the in-pipe pressurization system, the water bath system and the high-temperature system are all connected with the control system. According to the invention, coupling conditions of various aging factors during real service of the buried pipeline can be truly and rapidly simulated, effective reference basis can be provided for safe operation and construction design of the high-density polyethylene buried pipeline, and the method has great advantages.

The invention relates to the technical field of organic adhesives, in particular to a dual-curing composition and a preparation method and application thereof. The dual-curing composition comprises an acrylic monomer, an acrylate oligomer, a photoinitiator, dual-curing resin, first epoxy resin and a modified curing agent, wherein the molecules of the dual-curing resin contain acrylate groups and epoxy groups at the same time; the modified curing agent comprises an amine curing agent and a prepolymer of second epoxy resin. According to the dual-curing composition disclosed by the invention, through compounding and synergistic interaction of the components, reactions such as carbon-carbon double bond polymerization, epoxy ring opening and amido addition are carried out under ultraviolet irradiation and normal temperature, so that dual curing is realized through cross-linking polymerization, and devices such as a perovskite battery and the like can be efficiently packaged. Wherein the dual-curing resin further increases the chain length of the polymer, so that a compact three-dimensional network structure is formed after the composition is cured, the moisture and gas blocking performance of the cured composition is improved, and the stability of a packaged device is improved.

The invention discloses an imidazole derivative curing agent and a preparation method of a space stiffening material with low volatility and high stability, and belongs to the field of preparation of space developing materials. The method comprises the following steps: mixing a light curing agent, an imidazole derivative curing agent, acrylate resin and epoxy resin, vacuumizing, removing bubbles, pouring into a standard dumbbell spline mold, carrying out ultraviolet irradiation for 10-20 minutes to prepare a flexible material of a first network, then pre-curing at 130-150 DEG C for 3-4 hours, and curing at 170-180 DEG C for 3-5 hours to obtain a rigid material. Through molecular synthesis scheme design, the high-molecular-weight imidazole derivative is prepared, the reaction activity is reduced, the storage life is prolonged, and the problems of small molecule migration and vacuum gas outlet are solved. Due to the molecular scheme design, more imidazole groups are introduced to a molecular chain and can be coordinated with metal ions to form ionic bonds, so that the reaction activity can be further reduced, the storage period can be prolonged, the molecular weight can be correspondingly increased, and the migration condition can be inhibited.

The invention discloses a preparation process of an early-warning anti-loosening bolt, and relates to the technical field of bolts, the outer side of a bolt base body is coated with a layer of anti-corrosion sheath containing a polyamide composite material through an injection molding process, so that the effect of improving the corrosion resistance of the bolt is achieved. Furan-2, 5-diketone is used for modifying aminated graphene oxide, maleimide modified graphene oxide is obtained, maleimide has the characteristic of being sensitive to ultraviolet light, and can react with styrene and methyl methacrylate under ultraviolet irradiation, so that vinyl graphene oxide is obtained; and then polyamide modified glass fibers are added, so that the corrosion resistance of the bolt is further improved.

The invention belongs to the technical field of two-dimensional material preparation, and provides a method for preparing an MXene material based on a free radical mechanism, and the method comprises the following steps: S1, carrying out acid pickling on MAX phase powder to obtain an acid pickling precursor; s2, mixing the pickling precursor, an organic halogenation reagent and a buffer reagent, and then performing an etching reaction under an ultraviolet irradiation condition; s3, after the etching reaction is completed, an obtained product is cleaned and dried, and the MXene material is obtained. According to the method, the organic halogenation reagent is irradiated by ultraviolet light, so that the halogen free radicals are excited, and the halogen free radicals are used as an etching agent to realize selective etching of the A layer in the MAX phase material, so that the MXene material is prepared. The method has the characteristics of safety and environmental protection.

The invention discloses a preparation method of a high-swelling semi-interpenetrating structure hydrogel for soil water retention. The method comprises the following steps: dissolving polyvinyl alcohol (PVA) at high temperature, cooling to room temperature, and sequentially adding Arabic gum (AG) and a pre-neutralized acrylic acid (AA) solution; the preparation method comprises the following steps: adding a cross-linking agent N, N '-methylenebisacrylamide (MBA) and a photoinitiator 2-hydroxy-4'-(2-hydroxyethoxy)-2-methyl propiophenone (Irgacure 2959) into a mixed solution, fully mixing, carrying out ultrasonic oscillation, and finally completing a polymerization reaction under ultraviolet irradiation to prepare the hydrogel. The method is simple in preparation process and convenient to operate, and the prepared hydrogel shows efficient water absorption capacity and a long-term water retention effect and can continuously provide required moisture for plant growth. After the gel is used for many times, the gel can still maintain good swelling performance, and the service life is prolonged. The hydrogel disclosed by the invention is suitable for the application fields of water absorption and retention in agriculture and the like.

The invention belongs to the field of medicines, and discloses application of a protein polymer in preparation of a medicine for treating autism. The inventor finds that a protein polymer generated after mesenchymal stem cells are stimulated by a stress environment, such as ultraviolet radiation, has a certain treatment effect on autism, and provides possibility for treatment of autism.

The present application belongs to the technical field of biomedical functional materials, and particularly relates to a drug structural coating having a super-hydrophobic property and a preparation method therefor. The preparation method in the present application uses a phenol amine compound to undergo oxidation, crosslinking and polymerization reactions under the action of an oxidant to generate a polyphenol nanoparticle film layer outside drug-loaded nanoparticles. The polyphenol nano film layer not only serves as a "protective layer" for the drug-loaded nanoparticles and a cross-linking substance between the drug-loaded nanoparticles, but also can immobilize the drug-loaded nanoparticles onto the surface of a substrate material, so that after reaction and deposition, a drug nanometer multi-level structural coating having a micro-nano topological structure can be formed on the surface of the substrate material. During an irradiation process, an ultraviolet cross-linking device can generate a large number of active oxygen free radicals, so that by means of ultraviolet irradiation on a sample, the active oxygen free radicals fully react with a micelle protective layer in the drug coating, so as to convert hydrophilic phenolic hydroxyl in the phenol amine into hydrophobic quinonyl. Therefore, the micro-nano topological structure and the hydrophobic group cooperatively act to endow the surface of the material with the super-hydrophobic property.

The invention discloses a conductive hydrogel for promoting bone growth and a preparation method and application thereof.The preparation method comprises the steps that 1, a methacrylic anhydride gelatin hydrogel prepolymer solution is prepared, a photoinitiator is dissolved in deionized water, and a solution with the mass-volume concentration of 0.003-0.005 g / mL is prepared; methylacrylic anhydride gelatin Gelma is dissolved in the solution, and a methylacrylic anhydride gelatin hydrogel prepolymerization solution is prepared; (2) preparing a CuNPs dispersion liquid; (3) preparation of photo-crosslinking hydrogel: mixing the methylacrylic anhydride gelatin prepolymerization liquid and the CuNPs dispersion liquid to prepare a methylacrylic anhydride gelatin copper nanoparticle conductive hydrogel mixed liquid; in the mixed solution, the massic volume concentration of the methacrylic anhydride gelatin is kept at 0.05 g / mL, the concentration of the copper nanoparticles is 10 mmol / L-40 mmol / L, bubbles are removed, the mixed solution is added into a mold, ultraviolet irradiation is performed, and the photo-crosslinking hydrogel can be prepared. The gel has good conductivity, pore structure, biocompatibility and mechanical property, and has a good osteogenesis promoting effect. The preparation process is simple, and the repeatability is high.

The invention discloses an ultraviolet multi-curing heat-conducting insulating material which comprises an epoxy resin oligomer, a polyacrylate oligomer, a reactive diluent, a composite photoinitiator and a sulfydryl-containing silane coupling agent modified heat-conducting particle filler. After ultraviolet irradiation, multiple curing reactions, including free radical polymerization, cationic polymerization, sulfydryl-alkene click addition reaction and sulfydryl-epoxy ring-opening reaction, can be rapidly initiated. The heat-conducting insulating material disclosed by the invention has very high crosslinking density and a more continuous heat-conducting network, and is high in curing speed, free of volatile gas and simple and convenient in preparation process.

The invention belongs to the technical field of adsorption materials, and discloses a modified activated carbon material and a preparation method and application thereof.The preparation method comprises the following steps that 1, an oxidizing agent solution is added into cleaned and dried activated carbon, heating modification is conducted, then the activated carbon is taken out, the oxidizing agent solution and impurities remaining in pores of the activated carbon are removed through washing, and drying is conducted to obtain modified activated carbon; pre-treated activated carbon is obtained; and 2) placing the pretreated activated carbon in a methyl acrylate atmosphere, then taking out the pretreated activated carbon, spraying a photoinitiator solution on the surface of the pretreated activated carbon, carrying out ultraviolet irradiation, and drying after the irradiation is finished to obtain the modified activated carbon material. According to the invention, the oxygen-containing functional group and the methyl acrylate oligomer are introduced on the surface of the activated carbon, so that the adsorption selectivity and the adsorption capacity on the acrylate VOC are enhanced, and the modified activated carbon material is suitable for efficient removal of various acrylate VOCs and has a wide application prospect.

The present invention relates to the technical field of wastewater treatment, and discloses a medical wastewater disinfection treatment system, which comprises a disinfection tank, and further comprises: a disturbance assembly, which is used for stirring wastewater in the disinfection tank to make the wastewater present a vortex shape; the ultraviolet lamp is arranged in the disinfection tank and located at the axis position of the disinfection tank, and an ultraviolet irradiation area is formed above the center of a formed vortex; the at least two liquid discharge pipes are connected to the outer wall of the disinfection tank, the two liquid discharge pipes are vertically distributed, the horizontal height of each liquid discharge pipe is higher than that of the ultraviolet lamp, and an electromagnetic valve is mounted at a water inlet of each liquid discharge pipe. By controlling the opening height of the liquid discharge pipe and the stirring amplitude of the disturbance assembly, wastewater with different depths and colors can be subjected to irradiation disinfection treatment, the penetrating power of ultraviolet rays is ensured, and the disinfection effect on pathogens in the wastewater is improved.

The present invention discloses a sea dragon-derived antimicrobial peptide, SsPle, for antimicrobial applications in the complex environments of tropical islands and reefs. The amino acid sequence of this antimicrobial peptide is shown in SEQ ID NO. 3. This antimicrobial peptide, SsPle, exhibits good water solubility, broad antimicrobial activity, and highly stable antimicrobial properties under high temperature, high salt, and ultraviolet irradiation conditions. It can inhibit the release of free bacterial endotoxins and has significant application prospects as an eco-friendly antimicrobial agent in the unique environments of South China Sea islands and reefs.

The utility model relates to the technical field of aging test boxes, and discloses an ultraviolet aging test box which comprises a shell, the front end of the shell is connected with a cabinet door through a hinge, the interiors of the two sides of the shell are fixedly connected with heat insulation plates, the top of the shell is provided with an adjusting assembly used for adjustment, and the heat insulation plates are fixedly connected with the cabinet door. And the adjusting assembly comprises a threaded rod and an extension block, the threaded rod is rotationally connected with the top of the shell, the surface of the extension block is rotationally connected with a round shell, and an ultraviolet irradiation device is installed at the bottom of the round shell. According to the ultraviolet aging test box and the ultraviolet adjusting mechanism, a worker downwards screws a threaded rod, and the threaded rod is in threaded connection with the top of the shell, so that the threaded rod downwards pushes an ultraviolet irradiation device mounted at the bottom of the round shell; therefore, a worker can adjust the distance between the ultraviolet irradiation device and the test object according to test requirements to carry out an ultraviolet aging test, and the test accuracy is improved.

The invention relates to the technical field of plastic materials, in particular to a high-strength modified plastic product and a preparation process thereof. The preparation method comprises the following steps: uniformly mixing modified carbon fibers, a flame retardant, a photoinitiator and N, N-dimethylformamide, and performing ultraviolet irradiation, washing and drying to obtain a compound; uniformly mixing polyphthalamide, the compound, polyethylene wax, an antioxidant and a nucleating agent to obtain a blend; and carrying out melt extrusion, granulation and injection molding on the blend in a twin-screw extruder to obtain the modified plastic product. The modified plastic product prepared by the invention not only has excellent mechanical properties, but also has excellent flame retardance, and the use safety and durability of the modified plastic product are effectively improved.