41results about How to "Extended Diffusion Path" patented technology

The invention relates to the technical field of stainless steel pipe fittings, in particular to a high-performance anti-corrosion stainless steel pipe fitting and a preparation method thereof.The preparation method of the high-performance anti-corrosion stainless steel pipe fitting comprises the following steps that S1, mechanical polishing is conducted; s2, removing oil; s3, acid treatment is conducted, specifically, the stainless steel pipe fitting blank obtained after oil removal is soaked in an acid surfactant solution for 5-10 min, and the stainless steel pipe fitting blank is taken out, washed with water and dried; the solute in the acidic surfactant solution comprises acid and a cationic surfactant; s4, adsorption treatment is conducted, specifically, the stainless steel pipe obtained after acid treatment is soaked in an adsorption solution containing graphene oxide for 4-10 min, and the stainless steel pipe is taken out and dried; and S5, anti-corrosion coating treatment is conducted, specifically, anti-corrosion coating is sprayed to the surface of the stainless steel pipe fitting blank, drying is conducted, and the high-performance anti-corrosion stainless steel pipe fitting is obtained. The method has the advantage that the anti-corrosion performance of the organic anti-corrosion coating can be improved.

The invention discloses a strong acid and alkali resistant plastic material for fume hood surface decoration and a preparation method of the strong acid and alkali resistant plastic material, belongs to the technical field of plastic material processing, and aims at solving the technical problem that in the prior art, the acid and alkali resistance and the bending modulus of a plastic material for fume hood surface decoration need to be further improved. The preparation method specifically comprises the following steps: stirring amino-modified fluorosilicone resin, paraformaldehyde and 1, 4-dioxane in a reaction kettle, dropwise adding an anacardol solution, heating the reaction kettle to 85-95 DEG C, carrying out heat preservation reaction for 6-8 hours, and carrying out post-treatment to obtain the anacardol-based benzoxazine resin. Perfluoro-modified polysiloxane benzoxazine is prepared, naphthalene-containing epoxy resin and imidazole-modified silicon carbide microspheres are compounded, in-situ catalysis synergistic curing is carried out by using filler interface imidazole, a compact organic-inorganic hybrid interpenetrating network is constructed, and the strong acid and alkali corrosion resistance and bending modulus of the material are remarkably improved.

The invention relates to the technical field of bus ducts, and particularly provides a sealing plate assembly of a heat dissipation type bus duct connection area, which comprises a top plate, a bottom plate and two side plates arranged oppositely, the two side plates are arranged between the top plate and the bottom plate, and the two side plates, the top plate and the bottom plate enclose to form a connection area outer cover space. The top plate comprises lap joint sections located at the two ends of the top plate and a middle section located between the two lap joint sections, and the two lap joint sections are in lap joint with the outer sides of the tops of the adjacent bus duct sections respectively. A heat transfer path is formed between the closing plate assembly on the outer side of the connection area and the adjacent bus duct sections, heat generated in the operation process of the connection area can be diffused to the adjacent bus duct sections, the heat diffusion range is enlarged, local gathering of heat near the connection area is reduced, and the service life of the bus duct is prolonged. And the heat dissipation capability of the connection area is improved, and meanwhile, the sealing protection requirement of the connection area is considered.

This invention discloses a low-hydrogen flux-cored welding wire based on two-dimensional MXene surface self-assembly modification, its preparation method, and its application, belonging to the field of welding materials technology. The low-hydrogen flux-cored welding wire comprises a steel strip outer sheath and a flux core filled within it, the flux core being composed of metal alloy powder and modified composite flux core powder. Its preparation method includes: preparing a two-dimensional MXene colloidal dispersion using a chemical etching method; cationically modifying the insulating slag-forming powder; mixing the two and electrostatically self-assembling and coating them; after drying, mixing with the metal alloy powder; filling the steel strip; and rolling and drawing into shape. This invention constructs a three-dimensional continuous conductive network within the flux core through the MXene layer, improving arc stability; simultaneously, the MXene shell forms a physically water-blocking labyrinth, endowing the welding wire with ultra-low hydrogen characteristics; the active titanium released by the decomposition of MXene at high welding temperatures can refine the weld grains and improve mechanical properties. This welding wire can be widely used in automated gas-shielded welding processes for high-strength steel.

This invention discloses a hydrocolloid material containing guaiac, its preparation method, and its application, belonging to the field of medical care materials technology. It includes a backing layer and a hydrocolloid functional layer. The hydrophobic elastomer matrix comprises polyisobutylene, styrene-isoprene-styrene block copolymer, tackifying resin, liquid paraffin, and optionally caprylic / capric triglycerides. The pre-wetted hydrophilic absorbent powder comprises sodium carboxymethyl cellulose, pectin, gelatin, calcium alginate, sodium alginate, and caprylic / capric triglycerides. The composite plant repair oil comprises a phellodendron amurense lipid dispersion, Lithospermum erythrorhizon-Angelica dahurica extract, borage oil, sandalwood seed oil, borneol, and DL-α-tocopherol. The guaiac nanoliposome lyophilized powder is obtained by sequentially coating a guaiac nanoliposome aqueous dispersion with quaternized chitosan and sodium hyaluronate, then adding a lyophilization protectant and freeze-drying. This invention solves the problems of poor dispersion stability, easy degradation, insufficient soothing and repairing ability of guaiac, and instability in oil-water blends.

This invention discloses a water-based acrylic anti-corrosion coating and its preparation method, belonging to the field of water-based coating technology. The coating consists of an intermediate component and a post-crosslinking agent component. The intermediate component includes group A of acrylate monomers, group B of a corrosion-inhibiting container composed of co-intercalated layered double hydroxides, end-sealing halloysite nanotubes, and phytic acid, group C of a magnetically responsive barrier system composed of polydopamine-coated two-dimensional fillers and magnetically responsive iron oxide, and group D of additives such as reactive emulsifiers. The post-crosslinking agent component is mixed with an aqueous solution of adipic acid dihydrazide before use. The monomers in group A undergo a three-stage emulsion polymerization to form a hard core-functional intermediate layer-self-crosslinking soft shell structure emulsion. During film formation, the two-dimensional fillers are oriented parallel to the substrate surface by a rotating magnetic field, forming a multi-level protection of passive shielding, interface passivation, and post-crosslinking curing, which improves adhesion, shielding properties, self-healing, and storage stability compared to existing coatings.

The application discloses a biomass-based carbon@iron oxide composite material and a preparation method and application thereof. The biomass-based carbon@iron oxide composite material is prepared from biomass, iron salt and ultrapure water through hydrothermal and calcination treatment. The biomass-based carbon@iron oxide composite material has a sheet structure, in which iron oxide particles are riveted on a carbon matrix. The diameter of the iron oxide particles is 16-28 nm, the BET specific surface area is 35.67-103.81 m2 / g, and the specific capacity is 1,000-1,500 mAh / g. 2 g ‑1 The biomass-based carbon@iron oxide composite material of the application is applied to lithium ion batteries, has the advantages of long cycle life, high specific capacity and the like, and is characterized by wide raw material sources, easy large-scale production, low price, safe operation, easy recovery of byproducts and green and pollution-free production.

The application belongs to the technical field of fertilizers, and particularly relates to a humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate and a preparation method thereof. The humic acid organic-inorganic compound fertilizer comprises the following raw materials in parts by weight: 22-30 parts of biogas residue, 35-55 parts of humic acid, 8-13 parts of fine columnar algae powder, 5-8 parts of urea, 12-17 parts of ammonium sulfate, 12-15 parts of superphosphoric acid calcium, 15-20 parts of potassium sulfate and 10-15 parts of slow release coating suspension. Test results show that the humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate prepared by the application can reduce the nitrogen and phosphorus release rates of the humic acid inorganic compound fertilizer, has better slow release effect, significantly promotes the plant height, stem diameter and root length of soybeans and corn, has obvious growth promotion effect, and has wide application prospect.

This invention relates to the field of corrosion protection, specifically to a wear-resistant and corrosion-resistant material and coating, their applications, and a wear-resistant and corrosion-resistant paint, its preparation method, and applications. The wear-resistant and corrosion-resistant material of this invention includes a wear-resistant and corrosion-resistant coating, the composition of which includes: epoxy resin, phenol-modified graphene, filler, nonionic dispersant, and curing agent; the epoxy resin includes phenolic epoxy resin and bisphenol A epoxy resin; the phenol-modified graphene includes graphene oxide and phenolic substances formed on the graphene oxide. The wear-resistant and corrosion-resistant paint of this invention has advantages such as good stability, good brushing performance, and simple construction process; the prepared coating exhibits excellent wear resistance, good acid / alkali resistance, strong adhesion, and good toughness.

A lithium-ion battery electrode, a preparation method thereof, and a lithium-ion battery are disclosed. The electrode includes a current collector and n electrode plate layers laminated on the current collector, n being an integer greater than or equal to 2. The electrode plate layer contains a pore-forming agent. A content of the pore-forming agent in the electrode plate layers gradually increases along a direction gradually away from the current collector. The pore-forming agent is selected from an electrolyte solution additive which is solid at normal temperature.

The invention discloses a method for preparing a high-entropy silicide composite coating on the surface of an Nb521 alloy through a single-step slurry melting method and application, and relates to the technical field of high-temperature alloy thermal protection. The method comprises the following steps: uniformly mixing refined Nb powder, Mo powder, Cr powder, Ta powder, W powder, Zr powder, Hf powder, Y powder, Ge powder and a cosolvent through ball milling to obtain slurry I; si powder, Cr powder, V powder, Fe powder and Ti powder are subjected to ball milling and mixed to be uniform, and slurry II is obtained; and a separation coating method is adopted, the slurry I and the slurry II are sequentially brushed or dip-coated on the surface of an Nb521 alloy matrix, heat treatment is conducted for 30-90 min at the temperature of 1450-1550 DEG C, and then the high-entropy silicide composite coating is obtained on the surface of the Nb521 alloy. The refractory high-entropy metal silicide composite protective coating with metallurgical bonding and high compactness is prepared by adopting a staged slurry permeation sintering method of a metal framework and a silicon source.

The invention discloses a high-barrier polyester bottle-grade slice and a preparation method thereof, and belongs to the technical field of polyester. The invention discloses a preparation method of 4, 4 '-dihydroxy 4, 4 '-diaminostilbene and succinic anhydride react to prepare a third monomer containing an amido bond, a benzene ring and an unsaturated double bond, the third monomer, terephthalic acid and ethylene glycol are subjected to esterification and polycondensation reaction under the action of a catalyst, sulfydryl modified cellulose / montmorillonite is added into a polycondensation reaction system, and a polyester bottle-grade slice finished product is prepared. Double bonds in a stilbene structure of the third monomer and benzene rings on the two sides form a pi-pi conjugated system, the rigidity of polyester molecular chains is enhanced, amido bonds and ester bonds of polyester can form strong hydrogen bonds, the acting force between the molecular chains is improved, the introduced unsaturated double bonds react with sulfydryl of sulfydryl modified cellulose / montmorillonite under the high-temperature condition, and the sulfydryl modified cellulose / montmorillonite has the high-temperature resistance. The polymer and the sulfydryl modified cellulose / montmorillonite have a synergistic effect, so that the polyester bottle-grade slice has high barrier property.

The invention discloses kaolin-graphene composite aqueous slurry and a preparation method thereof. The preparation method comprises the following steps: S1, proportioning and mixing: mixing kaolin and amorphous carbon powder to obtain a solid mixture; s2, conductive networking and forming: adding a conductive auxiliary agent into the solid mixture obtained in the step S1, uniformly mixing, and then tabletting or granulating the mixture to obtain a to-be-treated blank; s3, ultrafast carbon heat treatment: carrying out ultrafast carbon heat treatment on two ends of the to-be-treated blank obtained in the step S2 in a negative pressure environment to obtain a composite filler; and S4, wet dispersion pulping: adding the composite filler obtained in the step S3 into a water-phase dispersion medium, and carrying out high-speed shearing dispersion, so as to obtain the kaolin-graphene composite water-based slurry. The waterborne epoxy anticorrosive coating has the advantages that stable dispersion and constructability can be realized in a waterborne system, and a multi-scale layered shielding network is constructed in a coating film, so that the barrier property and durability of the waterborne epoxy anticorrosive coating are improved.

The invention provides a jujube fruit cracking prevention film agent as well as a preparation method and a use method thereof.The jujube fruit cracking prevention film agent is prepared from the following raw materials in parts by mass: 1-5 parts of a polyvinyl alcohol solution, 1-5 parts of a polyacrylamide solution and 0.5-1 part of a modified oxidized humic acid solution; wherein the polyvinyl alcohol solution is prepared from the following components in parts by mass: 1 to 5 parts of polyvinyl alcohol, 0.1 to 0.5 part of cross-linking agent and 50 to 120 parts of water; the polyacrylamide solution is prepared from the following components in parts by mass: 1 to 5 parts of polyacrylamide, 0.1 to 1 part of hydrophobic monomer and 80 to 150 parts of water; the modified oxidized humic acid solution is prepared from the following components in parts by mass: 1 to 2 parts of modified oxidized humic acid, 0.05 to 0.1 part of calcium salt, 0.05 to 0.1 part of phosphorus salt, 0.05 to 0.1 part of silicon fertilizer, 0.05 to 0.1 part of borax, 0.05 to 0.1 part of growth promoting agent and 30 to 80 parts of water. The jujube fruit cracking prevention film agent can prevent jujube fruit cracking.

This invention relates to the field of polymer compound technology, specifically to an antibacterial food-grade plastic product for sealing and preservation and its preparation method, comprising an outer support layer and an inner antibacterial layer. The outer support layer is prepared by melt blending raw materials such as PBAT, PLA, and modified nano-calcium carbonate, wherein the mass ratio of PBAT to PLA is 90-100:10-20. The inner antibacterial layer is composed of nano-chitosan, tea polyphenols, essential oil microcapsules, glycerol, and agarose, composited on the surface of the outer support layer. The essential oil microcapsules have a core-shell structure, loading plant essential oils onto mesoporous silica as a carrier, and are coated with calcium alginate on the outer layer. The antibacterial food-grade plastic product prepared by this invention possesses long-lasting antibacterial properties, excellent mechanical properties, and heat-sealing strength, and has broad application prospects in the food packaging field.

The invention relates to a structural battery based on integration of a honeycomb composite material and an electrochemical energy storage unit. According to the structural battery, a force bearing function and an electric energy storage function are combined. According to the battery, a bionic honeycomb composite material is adopted as a matrix, and a lithium ion electrochemical unit is embedded into the matrix, so that the multifunctional structure battery with high mechanical strength and excellent electrochemical performance is formed. The honeycomb composite material is used as a carrier and an ion transmission channel of an electrode active material, and is also used as a bearing structure of a mechanical load. According to the design, the energy density, the safety and the cycle life of the battery are remarkably improved, and the battery is particularly suitable for the fields of electric automobiles, aerospace and the like with relatively high requirements on light weight and space utilization rate.

The application relates to the technical field of rare earth catalysts, in particular to a high-efficiency nickel-containing nanometer catalyst and a preparation method and application thereof. The preparation method of the high-efficiency nickel-containing nanometer catalyst comprises the following steps: a pre-prepared carrier is obtained by coordination of tetraethyl orthosilicate and carboxyl-terminated polyamide amine; nickel nitrate and yttrium nitrate are added into anhydrous ethanol and stirred uniformly, the pre-prepared carrier is added into the mixture and ultrasonically treated, the pH value of the system is adjusted and stirred, centrifugation, washing, vacuum drying and crushing are carried out to obtain pre-prepared materials; the pre-prepared materials are calcined at 450-500 DEG C, naturally reduced to room temperature, and reduced by introducing a reducing gas in a tube furnace and reduced to room temperature. The application has high-dispersed nickel active sites and a carrier microenvironment, the stable carrier structure endows the catalyst with outstanding anti-sintering and anti-carbon deposition capacity, guarantees the durability of long-term operation, has an excellent application prospect, and is suitable for large-scale popularization and application.

The application relates to the dust removal field and discloses a dust removal device and a dust removal system, which comprise a first cylinder, a second cylinder, a mounting frame, a plurality of insulation assemblies, a discharge electrode and a dust collecting electrode. The first cylinder is connected with an air inlet pipe, the air inlet pipe partially extends into the first cylinder, the air inlet pipe is provided with an air outlet, the air outlet is opposite to the waste gas emission direction, the insulation assemblies are fixedly installed on the peripheral surfaces of the first cylinder and the second cylinder, the two ends of the discharge electrode are respectively installed on the mounting frames at the positions of the first cylinder and the second cylinder, one end of the dust collecting electrode is connected with the first cylinder, and the other end of the dust collecting electrode, which is away from the first cylinder, is connected with the second cylinder. The application prolongs the diffusion path of waste gas and prevents dust backflow by arranging the air inlet pipe with the air outlet opposite to the waste gas emission direction; the air cavity structure is limited by the first cylinder, the second cylinder and the tubular dust collecting electrode, the high-voltage electric field is formed by combining the discharge electrode in the air cavity, and high-concentration sulfuric acid mist aerosol and solid particulate matters are synchronously and efficiently captured.

The invention discloses hollow Silicalite-1 zeolite with controllable mesopores as well as a preparation method and application of the hollow Silicalite-1 zeolite, and the obtained Silicalite-1 zeolite is composed of a mesoporous shell with adjustable pore diameter and a hollow inner cavity. The Silicalite-1 zeolite is provided with a hollow cavity, sufficient space is provided for amine loading, a shell layer is provided with a mesoporous structure with the pore diameter adjustable in the range of 2-20 nm, and amine molecule dispersion and CO2 diffusion efficiency are both considered. The invention further provides a solid amine CO2 adsorbent, high-capacity loading and good dispersity of amine and efficient diffusion of CO2 are synchronously achieved through a composite structure of a hollow cavity and a controllable mesoporous shell layer of a zeolite carrier, and the tradeoff limitation of a traditional carrier between mass transfer and loading is broken through. The adsorbent can be used for capturing CO2 in medium and low temperature flue gas. According to the invention, the problems of poor amine dispersibility, large CO2 diffusion resistance, low adsorption capacity, easy inactivation and the like caused by narrow pore channels of the zeolite carrier of the existing solid amine adsorbent are solved.

The invention discloses an energy conveying pipeline special for a high-altitude area, and relates to the technical field of pipeline safety conveying. The device comprises an outer pipe body, a middle pipe body, an inner pipe body and two end body connectors which are coaxial, a plurality of first elastic pieces are fixedly arranged between the inner wall face of the outer pipe body and the outer wall face of the middle pipe body, and the first elastic pieces are distributed on the periphery of the middle pipe body at equal intervals in a circumferential array mode; through the combination of the outer pipe body, the middle pipe body, the inner pipe body, the first elastic piece and the second elastic piece, the whole pipeline is of a three-layer structure, an embedded structure is arranged in the pipeline, and therefore the stability of the structure in the pipeline can be kept, and when high twisting and deformation occur, embedded gaps are slightly deformed, external force disappears, and the pipeline recovers to the original shape; the influence of the temperature outside the pipeline on the interior of the pipeline can be greatly reduced, hydrogen can be conveyed, the torsion resistance is improved, the interior of the pipeline is prevented from being damaged, the service life is prolonged, and the fatigue resistance is improved.

The invention relates to an ethylene propylene rubber insulated mining energy storage cable and a preparation method thereof, and relates to the technical field of wire and cable manufacturing, the cable comprises a cable core, a wrapping tape and a sheath, the cable core is formed by twisting a direct current cable core, a control cable core and a temperature sensing optical cable; the direct-current insulating layer is prepared from ethylene propylene rubber, modified calcined clay, nano magnesium hydroxide, superfine aluminum hydroxide, an assistant crosslinker and other raw materials, and the water tree resistance is improved through the synergistic effect of lamellar filler and a cross-linked network; the temperature sensing optical cable is filled with thixotropic buffer paste containing molybdenum disulfide, dynamic reverse pre-twisting is applied during cabling, the pay-off tension is controlled to be smaller than 75% of a direct-current cable core, and physical excess length is given to the optical fiber structure; and the sheath is made of a low-smoke halogen-free flame-retardant material formed by blending EVA and POE. The problems of insulation aging and optical fiber breakage of the mining cable in a humid vibration environment are solved, and the electrical insulating property, the mechanical flexibility and the state monitoring reliability of the cable are improved.

The application discloses a mesoporous hollow sphere assembly structure catalyst and a preparation method and application thereof, and belongs to the technical field of hydrogen production by methane decomposition. The preparation method comprises the following steps: dissolving Ni salt, Al salt and Ce salt in a solvent, and controlling the molar ratio of Ni, Al and Ce to be 7:(1-2.5):(0.5-2); obtaining atomized liquid drops through atomization, and performing a decomposition reaction on the atomized liquid drops at 400-500 DEG C; collecting reaction products, drying, and then calcining by heating to 550-700 DEG C to obtain a catalyst precursor; and performing reduction treatment on the catalyst precursor in a reducing atmosphere, and the mesoporous hollow sphere assembly catalyst with a cerium-doped regulated interface is obtained. The catalyst exhibits remarkable high mass space velocity long-term stability and anti-coking performance in the methane catalytic decomposition reaction.

The application provides a kind of anticorrosive flame-retardant paint and its preparation method, belongs to the technical field of coating composition, comprising the following steps: S1, preparation WPU-SS emulsion;S2, preparation composite flame-retardant reinforcing material;S3, WPU-SS emulsion and water-based epoxy resin emulsion are mixed uniformly, glass flake, ammonium polyphosphate, composite flame-retardant reinforcing material, titanium dioxide and auxiliary agent are sequentially added, mixed and stirred, then curing component is added, mixed and stirred to obtain anticorrosive flame-retardant paint.The application can improve the flame-retardant performance while having good anticorrosive performance.

The present application relates to the technical field of powder coating, in particular to a bio-based epoxy resin anticorrosive powder coating and a preparation method thereof.The present application overcomes the problem that high bio-based content and corrosion resistance cannot be considered in the prior art.The powder coating of the present application is composed of modified epoxy resin, rosin-based epoxy resin, modified bio-based phenolic amine curing agent and titanate modified composite filler;the long chain structure of dimer acid and the rigid skeleton of rosin are used to achieve the rigid and tough balance of the coating;the curing agent modified by amino-terminated silicone oil is used to endow the coating surface with low surface energy and hydrophobic characteristics;the biochar loaded graphene and the in-situ grafting technology in the step temperature control extrusion process are combined to build a dense anticorrosive barrier;the problem of large brittleness and poor water resistance of bio-based coating is solved, and the present application is suitable for heavy anti-corrosion fields such as pipelines and marine facilities.

This invention relates to the field of ceramic glaze technology, and discloses a high-strength antibacterial ceramic glaze and its processing method. This ceramic glaze is formed by mixing potassium feldspar, calcite, and other materials as base materials, and loaded attapulgite antibacterial materials as additives. During the sintering process, the copper ions in the loaded attapulgite antibacterial material are ablated to form copper oxide. Because the copper oxide is loaded with attapulgite, it avoids agglomeration, thus better exerting its antibacterial properties. Furthermore, the silicon-oxygen bonds contained in the organic modification of the attapulgite form silica sol during sintering. The presence of silica sol significantly improves the hydrophobicity of the glaze layer, thereby effectively improving its cleaning effect. In addition, the copper oxide loaded on the attapulgite surface acts as anchor points. When external force is applied to the glaze layer, these anchor points prevent direct slippage of the lamellae, causing cracks to bypass the anchor points, thereby extending the crack propagation path and achieving a reinforcing effect.

The utility model provides an aerobic stirring device for Badam vegetable oil fermentation, which comprises a tank body, a liquid collecting pipe arranged at the bottom of the tank body, a liquid inlet and outlet pipe communicated with the bottom of the liquid collecting pipe, a top cover arranged at the top of the tank body, a vertical stirring shaft arranged in the middle of the top cover, and two pairs of stirring paddles arranged up and down on the part of the stirring shaft extending into the tank body, the inner walls of the two end surfaces of the stirring paddle are respectively provided with a waterproof breathable film; the part, extending out of the top cover, of the stirring shaft is sleeved with a transmission gear; a motor is arranged on the top surface of the top cover and is in driving connection with a rotating shaft; the top end of the rotating shaft is connected with a driving gear; a rotating joint is arranged at the top end of the stirring shaft, and a breather pipe is connected to the top of the rotating joint. According to the utility model, the flat cylindrical stirring paddle is arranged, and a plurality of vent holes are formed in the end surface of the stirring paddle, so that the oxygen diffusion path can be enlarged, and the stirring contact range can be enlarged.

This invention belongs to the field of waterborne anti-corrosion coating manufacturing technology, specifically relating to highly corrosion-resistant waterborne coatings and their preparation methods. This invention uses waterborne epoxy resin emulsion and waterborne acrylic emulsion as resin matrices, improving the film density of the waterborne coating. In the composite anti-rust pigment, surface-modified graphene and calcium-ion-loaded silica particles are grafted with epoxy groups using KH-560, improving the compatibility of the calcium ion-exchange type anti-rust pigment in the resin matrix. Modified mica iron oxide and surface-modified graphene extend the diffusion path of corrosive media through a layered structure. Potassium silicate helps form an inorganic silicate protective layer and seals the micropores of the coating, improving the coating's shielding performance. The calcium ion-exchange type anti-rust pigment generates a silicate passivation film through calcium ion exchange, reducing the rate of further iron dissolution. The waterborne coating of this invention is suitable for anti-corrosion protection of metal substrates in harsh corrosive environments such as marine salt spray and industrial acids and alkalis.

The utility model discloses a hot press for wood boards. The hot press comprises a base, a hydraulic assembly and an autoclaving assembly. The base comprises a base, a mounting plate and a baffle, wherein the mounting plate and the baffle are perpendicularly fixed to the top of the base. The base, the mounting plate and the baffle form a U-shaped structure. The hydraulic assembly comprises a hydraulic cylinder and an extrusion plate, the hydraulic cylinder is fixed to the baffle, and the extrusion plate is fixedly installed at the output end of the hydraulic cylinder. The pressure steaming assembly comprises a plurality of pressure steaming plates arranged at intervals in the length direction of the base, the pressure steaming plates are arranged in a hot pressing space formed between the mounting plate and the baffle in parallel, and the plate face of each pressure steaming plate is parallel to the pressed plane of the extrusion plate and the inner side plane of the baffle. According to the hot press, through the design of the vertical stacked hot pressing space, the hydraulic pressure conduction direction is consistent with the gravity, the interlayer pressure difference caused by the gravity of traditional horizontal equipment is eliminated, it is ensured that all layers of wood boards are evenly pressed, and the problems that the moisture content distribution is uneven, gluing cracks and finished product warping are effectively solved.

The present application relates to a kind of perovskite precursor solution stability protection method, belong to perovskite photovoltaic technical field, solve the problem that perovskite precursor solution is easily affected by light, oxygen and water vapor and occurs degradation deterioration in the process of opening bottle use.The method of the present application is: perovskite precursor solution is stored in liquid storage container, perovskite precursor solution surface is covered with a layer of liquid protective layer formed by liquid protective agent;The absorbance A of liquid protective layer in 300~550 nm wave band is greater than or equal to 3.The present application forms threefold protection of light shielding, oxygen isolation and water vapor barrier through liquid protective layer, can continuously provide interface protection in the process of opening bottle and static storage, effectively improve the stability of perovskite precursor solution.

The application relates to a bionic three-dimensional electrode and a preparation method and application thereof, and belongs to the technical field of batteries. The bionic three-dimensional electrode comprises an electrode main body and a supporting part. The supporting part is connected with the electrode main body and is symmetrically arranged on both sides of the electrode main body. The number of the supporting parts is at least two, and the supporting parts are parallel to each other. The 3D printing centipede structure bionic three-dimensional electrode provided by the application has simple preparation process, and the battery performance can be improved only by improving the three-dimensional electrode structure, which is beneficial to subsequent commercial production.