1155results about How to "Effective absorption" patented technology

The invention discloses a water jet assisted laser-electrochemical combined machining method which comprises the following steps: pre-treating a nickel-based superalloy to be machined, and fixing the nickel-based superalloy on a machining table; a machining area is positioned, parameters of water jet assisted laser and electrochemical machining are set, so that during laser machining, water jet cools the machining area and removes slag, and an electrolyte does not affect a non-machining area; meanwhile, water jet assisted laser and electrochemistry are started to machine the nickel-based superalloy, and the machining state is monitored in real time; and after composite machining is completed, the nickel-based high-temperature alloy is cooled. By accurately setting laser, water jet and electrochemical machining parameters, the efficient synergistic effect of the laser, water jet and electrochemical machining parameters in a machining area is ensured, the machining precision and the surface quality are effectively improved, the defects of heat affected zones, microcracks, recast layers and the like are remarkably reduced, and the machining quality is improved. And meanwhile, corrosion to a non-machining area is reduced through the mode of spraying the electrolyte in a pulse mode.

The invention belongs to the technical field of carbon sequestration, and particularly relates to a fluidization reaction device and method for efficiently mineralizing carbon dioxide by solid waste, and the method comprises the following steps: pretreating the solid waste to obtain solid waste powder; the method comprises the following steps: atomizing an alkaline solvent into water mist, inputting CO2 gas and the water mist into a fluidized bed reactor by utilizing a fan, and adding solid waste powder into the fluidized bed reactor; the mass ratio of the water mist and the solid waste powder entering the fluidized bed reactor and the gas flow speed of the CO2 gas and the water mist are adjusted, gas-liquid-solid three-phase fluidization is conducted on the solid waste powder in the fluidized bed reactor under driving of the gas phase of the CO2 gas, and mineralization reaction is conducted; after full reaction, discharging solid waste powder by using a rotary discharging device, and drying the solid waste powder to constant weight by using a constant-temperature drying box to obtain an auxiliary cementing material; according to the method, the contact efficiency and the mass transfer rate of the solid waste and CO2 can be improved, the solid waste can quickly react with CO2 gas in the fluidized bed reactor, the reaction time is remarkably shortened, and the low cost and the high efficiency of the CO2 mineralization reaction of the solid waste powder are realized.

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention relates to the technical field of electronic equipment, in particular to a tablet computer lateral protection structure and a tablet computer. According to the technical scheme, the lateral protection structure of the tablet personal computer comprises a strip-shaped air bag, a strip-shaped groove is formed in the edge of the front face of the tablet personal computer, the strip-shaped air bag is arranged in the strip-shaped groove in an embedded mode, protection air bags are arranged on the side edges of the tablet personal computer in an embedded mode, and arc-shaped buffering pads are arranged on the protection air bags. And communicating assemblies are arranged between the close parts of the protective air bags and the strip-shaped air bags. According to the tablet personal computer lateral protection structure and the tablet personal computer, by designing the strip-shaped air bag, the protection air bag, the arc-shaped buffering cushion and other assemblies, the problem that the tablet personal computer is prone to lateral impact and collision in the carrying and using process is effectively solved.

The invention provides a photovoltaic inverter for a solar photovoltaic module, and belongs to the field of photovoltaic inverters. Comprising a shell, a mounting seat is fixedly connected to the inner surface of the shell, a power module and a control module are fixedly connected to the outer surface of the mounting seat, ventilation grooves are symmetrically formed in the outer surface of the shell, and a dehumidification assembly is arranged on the inner side of the shell and comprises a partition plate fixedly connected with the lower end of the inner surface of the shell; a supporting plate is fixedly connected to the outer surface of the partition plate, a notch is formed in the outer surface of the upper end of the supporting plate, and a baffle is fixedly connected to the inner surface of the shell. Through the arrangement of the moisture removal assembly, air can be in full contact with the moisture absorption plate after entering the shell, moisture in the air can be effectively absorbed, the probability that condensation is formed in the inverter is reduced, the stability and safety of the inverter in the working process can be improved, and meanwhile the service life of the inverter can be effectively prolonged.

The invention discloses a water area pollutant emergency treatment system and equipment in the technical field of water pollution treatment, and the system comprises a plurality of water quality monitoring modules which are used for collecting water quality factors of a covered area and generating real-time water quality data; the data collection module is used for acquiring, storing and forwarding real-time water quality data; the prediction module is used for analyzing and predicting the pollutant component evolution condition based on the real-time water quality data by using a big data model, and generating a pollutant component evolution condition graph of the water area; the emergency preprocessing scheme generation module is used for generating a corresponding preprocessing scheme and a preprocessing position based on the pollutant diffusion range diagram and the pollutant component evolution situation diagram; the biological filtration assemblies are used for being deployed at the pretreatment position and filtering and cleaning the water area. Plants aiming at specific pollutants are planted on the biological filtration assembly, and long-term ecological restoration can be achieved while water area pollutants are emergently treated.

The invention discloses an impact-resistant packaging material and a preparation method thereof, and relates to the technical field of packaging materials. When the impact-resistant packaging material is prepared, the zinc oxide-loaded porous silicon dioxide microspheres and the phosphorus-silicon synergistic flame retardant react to prepare functionalized porous silicon dioxide microspheres; the preparation method comprises the following steps: reacting 4-[2, 2 ': 6', 2 ''-terpyridyl]-4 '-yl-benzylamine with ethyl acrylate to prepare a terpyridyl diester monomer; the preparation method comprises the following steps: carrying out condensation polymerization on ethylene glycol, a terpyridyl diester monomer and benzophenone-4, 4 '-diethyl diformate to prepare functional polyester; the functionalized polyester and 2-aminoethyl-2-cyanoacetate are subjected to a reaction, and modified polyester is prepared; and carrying out melt blending on the modified polyester, the functionalized porous silicon dioxide microspheres, zinc chloride and 1, 6-dichlorohexane, and carrying out compression molding to obtain the impact-resistant packaging material. The impact-resistant packaging material prepared by the invention has excellent anti-aging, impact-resistant, flame-retardant and antibacterial properties.

The invention relates to the technical field of railway line flaw detection, in particular to railway line automatic comprehensive flaw detection equipment which comprises two steel rails and a flaw detection car and further comprises a C-shaped mounting plate, a buffer assembly, a waist detection mechanism and a bottom detection mechanism. A first fixing rod is transversely arranged in the C-shaped mounting plate, fixing sleeves are slidably connected to the two ends of the first fixing rod correspondingly, and balance assemblies are arranged at the ends, away from each other, of the two fixing sleeves correspondingly. The device has the advantages that different detection assemblies are arranged for different detection areas, so that steel rail detection of different parts is more efficient and accurate, it is ensured that different types of defects can be detected, the detection period is shortened, the balance assembly and the buffer assembly cooperate with each other to enable the head detection assembly to keep a dynamic balance state, and the detection efficiency is improved. The probe is effectively protected from vibration damage, and the adaptability of the probe to the change of the steel rail and the detection stability of the probe are improved.

The utility model relates to the technical field of heat exchangers, and discloses a slotted water-drop-shaped fin microchannel heat sink which comprises a heat sink upper cover plate and a heat sink lower cavity, the heat sink upper cover plate and the heat sink lower cavity are connected in a sealed mode to form a heat exchange cavity, the heat sink upper cover plate is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the heat exchange cavity. The liquid inlet and the liquid outlet are communicated with the heat exchange cavity, a micro-channel unit is arranged in the heat exchange cavity, the micro-channel unit comprises a plurality of fins which are distributed in an array mode, and each fin is in a water drop shape and comprises an arc end and a sharp corner end opposite to the arc end; a first through groove and a second through groove are formed in the arc end in the direction facing the sharp corner end in a spaced mode, and the arc end is a fluid input end. The utility model has the following technical effects: 1, the heat transfer surface area is increased, and the heat exchange efficiency is improved; resistance is reduced, and system efficiency is improved; accumulation of dirt and sediments is reduced, and the maintenance cost is reduced.

The utility model relates to the technical field of electrical equipment, and discloses an electrical equipment transportation device which comprises a transportation vehicle body, a bottom plate is fixedly installed at the bottom of the transportation vehicle body, a first sliding groove and a second sliding groove are formed in the top of the bottom plate, and the first sliding groove and the second sliding groove are formed in a penetrating mode; through the multiple dampers and the clamping plates, the clamping plates can fix the four sides of the electrical equipment at the same time, it is ensured that the equipment is more stable in the transportation process, shaking and displacement are reduced, damage to the equipment caused by collision or friction is avoided, the dampers can effectively absorb and disperse impact from the road surface, the vibration influence on the electrical equipment is reduced, and the service life of the electrical equipment is prolonged. The internal structure and electronic components of the electrical equipment are protected from being damaged, the rollers at the bottom can be driven to move up and down for lifting through the lifting plate and the rollers, and when the equipment needs to be positioned or fixed, the rollers can move upwards, so that the electrical equipment is stably placed on the ground or other planes, and the equipment is prevented from sliding or moving.

The invention belongs to the technical field of natural gas purification, and particularly relates to a phase change absorbent for desulfurization and decarburization of natural gas and a preparation method thereof.The phase change absorbent is prepared from, by mass, 15%-60% of ionic liquid, 40%-85% of organic solvent and the balance water; wherein a cation donor of the ionic liquid is cyclic amine, and an anion donor of the ionic liquid is nitrogenous organic acid or nitrogenous organic acid salt; the cyclic amine-organic acid ionic liquid is used as an active component of the phase change absorbent, and the active component of the absorbent contains cyclic amido, so that the hydrolysis reaction of COS can be efficiently catalyzed, the COS is converted into H2S which is easily absorbed by the absorbent, and the efficient removal of the COS is realized; secondly, according to the content of the sulfide and the carbon dioxide in the natural gas, different kinds of organic acids are selected as anion donors of the ionic liquid, so that the alkalinity of the phase change absorbent is regulated and controlled, and the aim of efficiently removing the sulfide and the carbon dioxide in the natural gas is achieved.

The invention provides a high-water-resistance optical film and a polarizing plate comprising the same. The high-water-resistance optical film comprises a base film, a water-resistance layer and an adhesive layer, the structure of the high-water-resistance optical film comprises a water-resistance layer, a first adhesive layer, a base film and a second adhesive layer which are stacked in sequence, or the water-resistance layer, the base film and the second adhesive layer which are stacked in sequence, the surface of the waterproof layer is provided with nanometer protrusions and micropore structures which are uniformly and orderly arranged. The high-water-resistance optical film has excellent hydrophobicity, the water-resistance layer can efficiently absorb ultraviolet radiation, the problems of aging, yellowing, embrittlement and the like of the optical film caused by ultraviolet radiation are effectively prevented, the high-water-resistance optical film can be applied to a polarizing plate, and the service life of the polarizing plate is greatly prolonged.

The invention discloses an MEMS device and a preparation method thereof, and the preparation method comprises the steps: providing a first wafer, forming a cavity in the upper part of the first wafer, and forming a porous silicon layer at the bottom of the cavity; providing a second wafer with an etching stop layer on the surface, and bonding the upper side of the first wafer and the etching stop layer; a boss and a first bonding metal layer located on the boss are formed on the side, away from the first wafer, of the second wafer; forming a groove penetrating through the second wafer in the second wafer, and removing the etching stop layer between the cavity and the second wafer to form a suspended comb tooth structure; and providing a third wafer with a patterned second bonding metal layer on the surface, and bonding the second bonding metal layer and the first bonding metal layer to form a vacuum chamber. According to the technical scheme, the quality factor of the MEMS device can be remarkably improved.

The invention relates to the technical field of sound-absorbing materials, in particular to a foaming sound-absorbing material with a high aperture ratio structure and a preparation method and application thereof.The foaming sound-absorbing material comprises one or more of polylactic acid, poly (adipic acid) / butylene terephthalate and polyhydroxyalkanoate, the density of the foaming sound-absorbing material is 0.04-0.08 g / cm < 3 >, and the porosity of the foaming sound-absorbing material is 20-30%. The aperture ratio of the foaming sound absorption material is higher than 60%. According to the invention, the polymer foaming sound absorption material with high aperture ratio can be prepared without adding other fillers and assistants, the prepared foaming sound absorption material has the characteristics of high aperture ratio, small density and the like, and the foaming sound absorption material can realize efficient absorption of sound waves in a thickness range of 10 mm.

The invention relates to a dust-free cutting device for processing metal parts of textile machinery, which comprises a cutting main body mechanism, the cutting main body mechanism comprises a welding base, a protective cover, a cutting arm hinging base, a cutting arm hinging shaft seat, a cutting arm, a tail hinging plate, a stretching air cylinder, a laser transmitter, a main rotating motor base, a main rotating motor, a hollow chuck and a driving belt wheel; the protective cover is fixedly arranged on the welding base, the cutting arm hinge bases are fixedly arranged in the middle of the top face of the welding base, and the number of the cutting arm hinge shaft seats is two. The standards of cutting depth and cutting precision are improved; and the smoke adsorption effect is improved, the smoke absorption rate generated in the cutting process is increased, and therefore harm to workers caused by dust and smoke in equipment when equipment protection is opened for feeding and discharging is effectively relieved.

The invention relates to the technical field of power generation and energy storage, and discloses liquid cooling type new energy power generation and energy storage equipment which comprises a cabinet body. The energy storage equipment is mounted in the cabinet body; the temperature sensor is mounted on the side surface of the energy storage equipment; the cooling structure is arranged on the side surface of the energy storage equipment; the water removal structure is arranged on the side surface of the energy storage equipment; the water receiving structure is arranged on the side face of the energy storage equipment and located below the cooling structure; and the feedback structure is arranged on the side surface of the energy storage equipment. The mounting plate and the absorbent cotton on the mounting plate are driven to move through the connecting plate, the vertical plate and the connecting piece, the absorbent cotton is tightly attached to the side face of the outer-layer pipe, the absorbent cotton is clamped to the outer-layer pipe through the grooves in the absorbent cotton, and therefore condensate water generated on the surface of the outer-layer pipe can be effectively absorbed in the moving process; by means of the design, the situation that water mist is condensed into water drops and drips is avoided, and it is ensured that condensate water is effectively treated in time.

The invention relates to a production line for continuous production of sofa iron stands, which comprises an upper wheel die holder, a lower wheel die holder is clamped at the bottom end of the upper wheel die holder, a driving shaft is fixedly connected to the inner ends of the upper wheel die holder and the lower wheel die holder, and a workpiece is arranged at the outer end of the upper wheel die holder in a contact manner. The top end of the bending arm is in sliding connection with a hydraulic sliding block, the top end of the hydraulic sliding block is in sliding connection with a servo sliding block, the resilience force of a bent workpiece can be monitored through the detection device, accurate bending compensation is conducted, the resilience phenomenon of the workpiece caused by material characteristics is effectively compensated, and the size precision of a finished product is improved; according to the bending compensation device, the product quality and consistency are guaranteed, the stress relieving assembly conducts induction heating on the bent portion of the workpiece during bending compensation, internal stress is eliminated, secondary springback is prevented, meanwhile, the possibility that the workpiece deforms in the follow-up use process is reduced, the durability and reliability of the product are enhanced, and the overall performance of the product is improved.

The invention provides a modularized outdoor electric energy metering box, and relates to the technical field of electric energy metering boxes. The electric energy metering box comprises a box body, three hinged doors are hinged to the front end of the box body, a first mounting cavity is formed in one side of the inner wall of the box body, a second mounting cavity is formed in the middle of the inner wall of the box body, a third mounting cavity is formed in the other side of the inner wall of the box body, and a plurality of stabilizing assemblies are arranged on the inner wall of the second mounting cavity. And the inner wall of the second mounting cavity is fixedly connected with three fixing plates, and the two sides of the inner wall of each fixing plate are rotationally connected with a first two-way threaded rod and a second two-way threaded rod correspondingly. According to the modularized outdoor electric energy metering box provided by the invention, when gas in the third mounting cavity enters the second mounting cavity, the gas is dispersed by the distribution plate in the air dispersion assembly and then is uniformly distributed through the distribution holes, so that the situation that a certain place in the second mounting cavity is excessively cooled is effectively avoided.

The invention relates to the technical field of carbon dioxide recovery waste gas purification, in particular to waste gas purification equipment for carbon dioxide recovery and a purification method thereof.The waste gas purification equipment for carbon dioxide recovery comprises a shell assembly and further comprises a slag removal assembly, and the slag removal assembly comprises a fixed cylinder and a rotating part; the rotating component comprises a slag removal motor, a first stirring plate and a second stirring plate, a fan-shaped shell is fixedly mounted at the bottom of the outer cylinder, a water outlet part is arranged at the bottom of the fan-shaped shell, and a collecting component is arranged in the fan-shaped shell, and the waste gas purification method for carbon dioxide recovery comprises the steps of spraying, purification and the like. The device has the advantages that sediments in the lime water are continuously removed in the waste gas purification process, the negative influence of sediment accumulation on the sulfur dioxide removal efficiency is avoided, sulfur dioxide in the waste gas is effectively purified, corrosion of the sulfur dioxide to subsequent carbon dioxide recovery equipment is reduced, and the reliability and the safety of a whole waste gas treatment system are improved.

The invention relates to the technical field of cable materials, and particularly discloses a silane crosslinking low-smoke halogen-free flame-retardant polyolefin cable material for a photovoltaic cable and a preparation method of the silane crosslinking low-smoke halogen-free flame-retardant polyolefin cable material. The invention relates to a preparation method of a silane crosslinked low-smoke halogen-free flame-retardant polyolefin cable material for a photovoltaic cable, a material A and a material B are blended according to a mass ratio of (80-90): (10-20), the material A is prepared by mixing and banburying ethylene-vinyl acetate copolymer, metallocene polyethylene, a compatilizer, a flame retardant, a precursor, an antioxidant, a lubricant, a dispersing agent, an initiator and a vulcanizing agent, and the material B is prepared by mixing and banburying the ethylene-vinyl acetate copolymer, the metallocene polyethylene, the compatilizer, the flame retardant, the precursor, the antioxidant, the lubricant, the dispersing agent, the initiator and the vulcanizing agent. The material B is prepared by mixing and banburying an ethylene-vinyl acetate copolymer, a compatilizer, a delivery compound, a flame retardant, an antioxidant and a catalyst. The prepared silane crosslinked low-smoke halogen-free flame-retardant polyolefin cable material for the photovoltaic cable has the advantages of cracking resistance and good mechanical property in a cold and hot and optical radiation comprehensive environment.

The invention relates to a slow-release composite nanofiber mask with one-way moisturizing and oxidation resistance and a preparation method thereof.The one-way moisturizing nanofiber mask base cloth with asymmetric wettability is obtained through the preparation method, a hydrophilic layer adsorbs a nutrient solution and is dissolved when meeting water, a hydrophobic layer is kept dry, and the effect of delaying liquid volatilization is achieved; the effective time of the mask is prolonged. In addition, the nanofiber mask base cloth obtained through electrostatic spinning has good air permeability.

The embodiment of the invention provides a building board transfer device and a using method thereof. The building board transfer device comprises a frame, a plurality of cross beams, a dust removal mechanism, a second hose, a second main pipe, a second air pump, a vacuum suction cup and an air guide pipe. The dust removal mechanism comprises an annular pipe, a plurality of air inlet pipes, a supporting rod, a first hose, a first main pipe and a first air pump; the supporting rod is connected with the annular pipe, the annular pipe is connected with the multiple air inlet pipes, the annular pipe is connected with the first hose, the first hose is connected with the first main pipe, and the first main pipe is connected with the first air pump. Dust accumulated on the surface of the plate can be effectively absorbed, and the dust is prevented from interfering with formation of a negative pressure environment in the adsorption process of the vacuum suction cup. And the sealing performance between the vacuum chuck and the surface of the plate is ensured, so that the adsorption stability of the vacuum chuck is improved.

The invention discloses a water-retention and soil-moisture-conservation biodegradable agricultural film with a self-water-absorption structure and a preparation method of the water-retention and soil-moisture-conservation biodegradable agricultural film, and belongs to the technical field of degradable agricultural films. The agricultural film is formed by co-extruding an outer hydrophobic layer, a middle mechanical supporting layer and an inner hydrophilic layer, the outer hydrophobic layer is composed of a hydrophobic layer master batch and polyester in a mass ratio of (5-9): (1-5), and the hydrophobic layer master batch is prepared by blending and granulating polylactic acid, hydrophobic layered nanosheets and auxiliaries; the middle mechanical supporting layer is composed of a mechanical supporting layer master batch and polyester in a mass ratio of (5-9): (1-5), and the mechanical supporting layer master batch is prepared by blending and granulating polylactic acid, a bio-based filler and an auxiliary agent; the inner hydrophilic layer is composed of a hydrophilic layer master batch and polyester in a mass ratio of (5-9): (1-5), and the hydrophilic layer master batch is prepared by blending and granulating polylactic acid, super-hydrophilic nanoparticles and an auxiliary agent; the prepared agricultural film has water retention, hydrophobic and hydrophilic functions at the same time, has excellent mechanical strength and toughness, and can meet use requirements.

The invention provides an absorption and transmission integrated metamaterial structure with a wave-transparent window capable of being dynamically opened and closed, and belongs to the technical field of novel artificial electromagnetic materials, the metamaterial structure is formed by periodically arranging metamaterial structure units, the unit cycle of the metamaterial structure units is 15.0 mm, and the unit cycle of the metamaterial structure units is 15.0 mm. The metasurface comprises a double-layer spiral line chiral metasurface unit, a patch mesh complementary structure, a dielectric substrate layer, a carbon-based resistive film and a PIN diode, the metal structure layer comprises a chiral wave-absorbing layer and an active wave-transmitting layer, a plurality of dielectric substrate layers are arranged, the chiral wave-absorbing layer and the active wave-transmitting layer are respectively arranged on different dielectric substrate layers from top to bottom, the carbon-based resistive film is printed in a notch of the chiral wave-absorbing layer, and the PIN diode is printed in a notch of the active wave-transmitting layer. The wave-transparent window can be dynamically opened and closed in the wave band of 7-9.6 GHz, and efficient absorption can be achieved in the out-of-band frequency bands of 3-6 GHz and 11-21 GHz. The problems of wave absorption and wave transmission compatible design, dynamic opening and closing of the broadband wave transmission window and the like are effectively solved, electromagnetic and mechanical bearing functions are compatible, and the antenna can be applied to a multifunctional electromagnetic integrated system and an intelligent antenna housing system.

The invention relates to a self-repairing invisible car cover and a preparation method thereof, and relates to the technical field of automobile material processing, and the self-repairing invisible car cover comprises the following components in parts by mass: 20-40 parts of fluorine-containing polyol, 15-30 parts of polyisocyanate, 5-10 parts of a composite chain extender, 10-20 parts of self-repairing microcapsules, 1-3 parts of an initiator and 30-50 parts of a solvent. The preparation method comprises the following steps: preparing a self-repairing coating; coating the surface of the transparent substrate with an adhesive to obtain an adhesive layer, and covering the adhesive layer with a release film to obtain a semi-finished automobile cover; and the self-repairing coating is applied to the face, away from the release film, of the semi-finished automobile cover, heating and curing are conducted, the semi-finished automobile cover with a self-repairing coating is obtained, the self-repairing coating is coated with a protective film, and the self-repairing invisible automobile cover is obtained after curing. The automobile cover has the effect of improving the self-repairing performance of the automobile cover, and the automobile cover has good weather resistance, tensile resistance and puncture resistance.

The invention relates to the technical field of building decoration materials, and discloses a self-purification environment-friendly plate which comprises the following components in percentage by weight: 30-40% of MOFs, 15-25% of a nitrogen-doped carbon-based photocatalyst, 5-10% of graphene oxide, 5-10% of a self-repairing polymer, 0.5-2% of an antibacterial agent and 3-8% of a humidity adjusting material. The invention further discloses a preparation method of the environment-friendly plate with the self-purification function. Synthesis of MOFs (Metal Organic Frameworks); preparing and compounding a nitrogen-doped carbon-based photocatalyst; compounding the graphene oxide; introducing an antibacterial agent and a humidity adjusting material. Through the design of a composite material, multiple functions are realized: MOFs provide efficient adsorption capacity and can capture and decompose harmful gases such as formaldehyde and benzene series in air; the nitrogen-doped carbon-based photocatalyst generates a photocatalytic reaction under visible light, so that harmful gas is decomposed into harmless substances, and a self-purification function is realized.

The invention discloses incombustible water-based aerosol spray paint and a preparation method thereof, and relates to the technical field of spray paint. When the non-combustible water-based aerosol spray paint is prepared, firstly, p-(triethoxysilyl) acetophenone reacts with trimethylchlorosilane, and then the reaction product and tetramethyl tetravinyl cyclotetrasiloxane are subjected to ring opening polymerization to obtain modified polysiloxane; grafting epoxy resin with 4-vinyl-methyl benzoate, reacting with modified polysiloxane to obtain modified epoxy resin, and emulsifying to obtain a modified epoxy resin emulsion; secondly, reacting the silicon dioxide subjected to acylating chlorination with 4-hydroxy-2, 2, 6, 6-tetramethylpiperidine nitroxide free radicals, reacting with 3-(3-thienyl) propionaldehyde, and reacting with thiophene and 3-vinyl thiophene to obtain modified silicon dioxide; and finally, mixing the modified epoxy resin emulsion, pure water, the modified silicon dioxide, a curing agent and a photoinitiator to prepare the incombustible water-based aerosol spray paint.

The invention provides antibacterial carboxymethyl cellulose hemostatic gauze and a preparation method thereof.The preparation method comprises the steps that carboxymethyl cellulose gauze is soaked in a PBS buffer solution, N-hydroxysuccinimide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide are added into the PBS buffer solution, and a soaking solution is obtained after uniform mixing; adding the graft modified alginate oligosaccharide into the soaking solution, mixing and stirring to generate grafting reaction, taking out the carboxymethyl cellulose gauze after the reaction is finished, washing and drying to obtain the antibacterial carboxymethyl cellulose hemostatic gauze. According to the preparation method disclosed by the invention, the catechol-grafted modified alginate oligosaccharide and partially carboxymethylated carboxymethyl cellulose gauze are subjected to amidation grafting compounding, so that the hemostatic gauze with excellent antibacterial and hemostatic properties is prepared.

A multi-stage anti-impact energy absorption structure of a hydraulic column solves the problems of the existing anti-impact energy absorption mechanism of the hydraulic column, such as complex buffer structure, large space occupation, high manufacturing cost, limited impact energy that can be absorbed, inability to meet use requirements, large later maintenance workload, high maintenance cost, and long operation cycle for restoring tunnel support. It includes a multi-stage shear pressure column, characterized in that: a buffer energy absorption sleeve is provided at the lower part of the multi-stage shear pressure column, and the upper end opening of the inner cavity of the buffer energy absorption sleeve is plugged into the lower end of the multi-stage shear pressure column; a multi-stage anti-impact shear plate is fixedly provided in the inner cavity of the buffer energy absorption sleeve, and the multi-stage anti-impact shear plate is located below the multi-stage shear pressure column. It has a reasonable design and a compact structure, can realize multi-stage energy absorption buffering, can effectively absorb a large amount of impact energy, protect the structure of the hydraulic column, has good safety, is convenient for later maintenance, has a low production cost, and is flexible and reliable to use.

The invention belongs to the technical field of cosmetics, and discloses a photoprotection composition, application and a sunscreen cosmetic. The photoprotection composition comprises soluble collagen and a phyllanthus emblica fruit extract, and the mass ratio of the soluble collagen to the phyllanthus emblica fruit extract is 75: 1-25: 1. The soluble collagen has the characteristic of forming a film when meeting light, can be cross-linked and cured under a light source to form a layer of continuous film, has better defense capability on ultraviolet rays after being cured to form the film, and can provide comprehensive light protection for the skin. Meanwhile, the phyllanthus emblica fruit extract effectively protects keratinocyte apoptosis, oxidation and inflammatory damage caused by UVA / UVB, and has the remarkable capacity of preventing and treating ultraviolet damage. Therefore, the photoprotection composition can achieve synergistic interaction, not only can effectively absorb and utilize light, but also has the capability of resisting ultraviolet rays, can achieve comprehensive photoprotection for skin, and has an excellent photoprotection function when being applied to sunscreen products.