71results about How to "Improve binding stability" patented technology

The invention discloses a preparation method of a foamed thermal-insulation ceramic decorative plate in the technical field of building decorative materials. The method comprises the following steps: carrying out ball milling, spray drying, granulating and ageing on raw materials such as ceramic waste and kaolin; mixing and dispersing the aerogel-hydrogel gradient core-shell structure composite modified material and ceramic particles, and sieving to obtain composite powder; compounding sodium bicarbonate and azodicarbonamide with a foaming agent, mixing the foaming agent with the composite powder, and adding a surfactant and a dispersing agent to adjust the viscosity so as to prepare expandable ceramic slurry; the slurry is injected into a mold and coated with low-temperature glaze, and stepped heating sintering is conducted through a tunnel kiln and comprises the steps of preheating glue discharging, primary foaming, secondary sintering, gradient cooling and the like. The thermal insulation performance, the mechanical strength, the weather resistance and the decoration performance are synergistically improved, and the product is low in heat conductivity coefficient, high in compressive strength, excellent in ultraviolet aging resistance, firm in decoration layer combination and suitable for building outer walls and other scenes.

The present application relates to the field of high-speed spraying technology, in particular to a supersonic flame spraying process for steam turbine blades. The present application overcomes the problems of insufficient coating bonding strength and poor corrosion resistance of the supersonic flame spraying. The present application uses nickel-coated alumina composite sand for sandblasting pretreatment of the blades to achieve micro-implantation of active nickel; adjusts the ratio of NiCr and Cr3C2-NiCr powders by using double powder feeders to build a gradient structure coating with continuous component change; uses a modified sealing agent containing nano-alumina for vacuum impregnation sealing; and finally obtains finished blades through graded vacuum diffusion annealing. Through surface nickel implantation, gradient structure design and diffusion annealing, the present application realizes metallurgical bonding and thermal stress matching between the coating and the substrate, greatly improving the bonding strength; at the same time, the in-situ ceramicization reaction of the sealing agent eliminates micro-pores, significantly enhancing the corrosion resistance of the coating.

This invention relates to the field of functional textile materials technology, and discloses a fluorine-free waterproof fabric and its preparation process. The fluorine-free waterproof fabric is composed of a host-guest inclusion crosslinking type organosilicon synergistic film-forming agent, an organic small molecule film-forming component, a crosslinking promoter, a dispersant stabilizer, a softening agent, and a solvent. The host-guest inclusion crosslinking type organosilicon synergistic film-forming agent is prepared by forming a host-guest inclusion structure with β-cyclodextrin and adamantane carboxylic acid, followed by reactive modification with 3-isocyanate propyltriethoxysilane. The organic small molecule film-forming component is norbornene-2-carboxylic acid. Through host-guest inclusion, crosslinking, and organic small molecule synergistic film formation, a stable and dense fluorine-free waterproof functional layer is formed on the fabric surface. This invention significantly improves waterproof performance and its washability and abrasion resistance without using fluorine-containing compounds, while also maintaining the soft hand feel of the fabric, demonstrating good environmental friendliness and application prospects.

The invention belongs to the technical field of solid waste treatment and utilization, and particularly relates to modified manganese slag and application thereof in preparation of a cement material. The modified manganese slag disclosed by the invention is prepared by a method comprising the following steps: uniformly mixing maleic anhydride grafted polyethylene, epoxy group modified manganese slag, epoxy group modified nano alumina fiber and epoxy group modified basalt fiber, and then performing melt extrusion to obtain a polyethylene grafted manganese slag-polybasic fiber compound, and uniformly mixing the polyethylene grafted manganese slag-polybasic fiber compound and 5-chlorosulfonyl-2-hydroxybenzoic acid, and carrying out melt extrusion to obtain the modified manganese slag. The basalt fiber and the nano alumina fiber are combined with the manganese slag through chemical bonds and polyethylene long chains to form a compound, so that the combination stability and dispersion uniformity of the basalt fiber, the alumina fiber and the manganese slag can be improved, and the basalt fiber and the alumina fiber can play an anchoring role in a cement material; the mechanical strength and the low-temperature freezing resistance of the cement material are improved.

This invention discloses a method for preparing a supported low-carbon hydrocarbon deodorization catalyst. The method includes: (1) preparing a catalyst containing M... 2+ and M' 3+ (1) Add molecular sieve to the solution and stir evenly; (2) React the obtained suspension with a mixed solution of NaOH and Na2CO3 or a weak alkaline solution under stirring; (3) Obtain the composite carrier by drying and calcination; (4) Prepare a cobalt salt solution and transfer Co to the cobalt salt solution by ion exchange. 2+ (5) After filtration and drying, Co molecular sieve solid alkali is obtained; (6) Co molecular sieve solid alkali, ammonium phthalate sulfonate, urea, ammonium molybdate, and phthalic anhydride are added in proportion and ground evenly; (7) The obtained material is heated under an inert atmosphere to react and obtain the catalyst product. In the catalyst prepared by this invention, sulfonated cobalt phthalocyanine is combined with molecular sieve through chemical bonds, the active component has a stronger binding force and a longer service life.

The application provides a kind of hydrophilic tubular membrane, including support layer and separation layer successively from inside to outside;The pore size of the support layer is 0.5-1.5 μm, the pore size of the separation layer is 30-80 μm, and the support layer and the separation layer are diffused and intertwined at the interface, forming a continuous gradient structure without obvious interface.The separation layer contains modified nanosilica by silane coupling agent.The application effectively reduces the mass transfer resistance by gradient structure, significantly improves the hydrophilicity and anti-pollution performance of the membrane surface by using modified nanosilica, and has strong interlayer bonding strength, which is suitable for high-pollution industrial wastewater treatment and other fields.

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

This invention discloses a high-stability lithium battery separator, its preparation method, and its application, relating to the field of lithium-ion battery separator materials technology. The key technical points are that the separator is a multilayer composite structure, comprising: a polyolefin microporous base membrane; a ceramic nanoparticle layer uniformly loaded on the surface of the base membrane; and a cross-linked polymer coating covering the ceramic layer. The ceramic nanoparticles have a particle size of 10-100 nm, the coating thickness is 1-5 μm, and the overall separator porosity is 35%-55%. The ceramic nanoparticles are selected from at least one of alumina (Al2O3), titanium dioxide (TiO2), or magnesium hydroxide (Mg(OH)2), and are fixed to the base membrane surface by a sol-gel method or a spraying method. The ceramic nanoparticle layer constructs a heat-resistant support framework, which can limit the dimensional shrinkage of the polyolefin microporous base membrane under high-temperature conditions, reducing the risk of short circuits caused by separator thermal shrinkage.

The invention relates to the technical field of chemical synthesis, and discloses a PMMA impact modifier and a preparation method and application thereof.The PMMA impact modifier comprises a core layer, a transition layer and a functional shell layer, the core layer is sequentially coated with the transition layer and the functional shell layer, the core layer is a soft monomer crosslinking layer, the transition layer is a soft monomer and hard monomer crosslinking layer, the functional shell layer is a hard monomer crosslinking layer, the functional shell layer contains a photochromic component. Through the multi-layer structural design of the core layer, the transition layer and the functional shell layer, the shock resistance, the optical performance and the functional performance are synergistically improved; the core layer endows the material with good toughness and energy absorption capability, the transition layer effectively buffers performance difference between layers and keeps transparency, and the functional shell layer introduces a photochromic component while ensuring structural rigidity and durability, so that the material has a peep-proof function under the change of illumination conditions; the method is suitable for application scenes with high requirements on safety and functionality, such as PMMA products, automobile glass and the like.

The application relates to an LED light-emitting module, an LED packaging structure and a related manufacturing method, and relates to the technical field of semiconductor light emission. Each light-emitting diode chip is packaged in advance, a plurality of annular grooves are formed in the first packaging layer, each annular groove surrounds a corresponding light-emitting diode chip, a magnetic adsorption structure is formed in each annular groove, the magnetic adsorption structure is embedded into a plurality of second grooves, the peeling of the magnetic adsorption structure can be effectively avoided, the magnetic adsorption structure is magnetized, the above magnetic adsorption structure can realize the detachable connection of the light-emitting diode chip and the circuit substrate, the printing of solder and the reflow soldering process can be avoided, the manufacturing cost is greatly reduced, and since the light-emitting diode chip and the circuit substrate are detachably connected, the removal of a defective light-emitting diode chip is facilitated, and the repair of the light-emitting module can be smoothly realized.

The invention provides a negative electrode plate, a negative electrode plate preparation method and a battery, the negative electrode plate comprises a negative electrode active material layer, the negative electrode active material layer comprises a negative electrode active material and a modified binder, the negative electrode active material comprises a silicon carbon material and a polar coating, and the polar coating coats the silicon carbon material; the modified binder comprises a binder precursor, and an epoxy compound is grafted on the binder precursor. According to the negative plate provided by the invention, the silicon-carbon material is coated with the polar coating, the negative plate can be tightly attached to the silicon-carbon surface by utilizing polar interaction, the volume expansion of the silicon-carbon material is inhibited in the cyclic charging and discharging process, and meanwhile, the modified binder grafted with the epoxy compound can be used for inhibiting the volume expansion of the silicon-carbon material through the strong interaction among the epoxy compound, the silicon-carbon material and the polar coating. According to the present invention, the structure loosening caused by expansion is inhibited, and the flexibility of the binder is optimized, such that the binder can adapt to the expansion and shrinkage of silicon carbon, and the shedding of the active material and the side reaction of the electrolyte during the circulation process are reduced so as to effectively alleviate the capacity fading and improve the cycle life.

The invention relates to the technical field of blade repairing treatment, discloses a cold spraying repairing method for an aluminum alloy blade and aims to solve the problems that a base body is prone to being damaged and the performance of a repairing layer is poor in an existing repairing method. The method comprises the steps of mechanical polishing, cold spraying, mechanical coping and follow-up protection, specifically, surface inspection, pretreatment, spraying operation and multi-dimensional inspection are sequentially conducted on cold spraying, 501.1-mark pure aluminum-Al2O3 mixed powder is adopted, after positioning and precise parameter spraying are conducted through a special tool, coping is conducted till the molded surface requirement is met, and then micro-arc oxidation and paint spraying protection are conducted. The method is low in cold spraying temperature, free of damage to a base body, excellent in repairing layer performance, high in precision, high in corrosion resistance and abrasion resistance and stable and reliable in process, the operation and maintenance cost can be remarkably reduced, and the service life of the paddle is prolonged.

This utility model discloses a wrapping structure, including a wrapping layer. The wrapping layer includes a first bonding portion and a second bonding portion formed by bending from one side of the first bonding portion. The second bonding portion is used to bond with a second side. A bending portion is formed between the first bonding portion and the second bonding portion. The inner side of the bending portion is provided with a groove to release the stress generated by bending of the wrapping layer and prevent warping of the wrapping layer. This utility model effectively releases the stress generated when the wrapping layer is bent by providing a groove on the inner side of the bending portion of the wrapping layer, solving the problem of warping or even detachment of thin metal products after wrapping due to the reverse stress of the PET molding layer being greater than the bonding force of the base adhesive. At the same time, the layered design of the wrapping layer and the cooperation between the bonding portion and the bending portion, combined with the targeted setting of the groove, enable the wrapping structure to precisely bond with each side of the product, improving the bonding stability with the product, and is especially suitable for thin metal products with small thickness.

The application discloses a preparation method of modified polyether ether ketone composite material and application of the modified polyether ether ketone composite material in preparation of high-temperature insulation coating. The preparation method comprises the following steps: S1, mixing a solution containing KH-560 with nano-silicon dioxide, ultrasonic dispersion reaction is carried out at 50-60 DEG C for 2-3 hours, and then the solvent is removed to obtain modified nano-silicon dioxide; S2, after the prepared modified nano-silicon dioxide is premixed with polyether ether ketone powder, ball milling is carried out in a planetary ball mill, drying is carried out, heat treatment is carried out, and furnace cooling is carried out, and then the modified polyether ether ketone composite material is obtained. According to the scheme, the surface of the silicon dioxide is modified by the epoxy group of KH560, the epoxy group of KH560 is combined with the PEEK matrix to form a covalent bond, and the interface bonding strength and the thermal stability are significantly improved. On this basis, the nano-level uniform dispersion of the silicon dioxide in the pure PEEK matrix is realized by combining the ultrasonic dispersion and the planetary ball milling process.

The present application relates to a non-ferrous metal part coating material and a hot-dip plating preparation method thereof, and belongs to the technical field of metal surface treatment and hot-dip plating material. The coating material comprises a first coating material and a second coating material. In the preparation, the non-ferrous metal part is subjected to oil removal, micro-roughening and zinc-nickel-tin activation treatment, so that a zinc-nickel-tin activation primer film is formed on the surface of the non-ferrous metal part. Then, the non-ferrous metal part is subjected to first-stage low superheat hot-dip plating and second-stage corrosion-resistant hot-dip plating in sequence, so that an interface transition layer containing zinc, nickel and tin, a mutual diffusion buffer layer containing zinc, aluminum and magnesium, and a corrosion-resistant outer layer containing zinc, aluminum and magnesium are formed in sequence from the inside to the outside. The present application takes aluminum alloy parts as the main applicable object and takes into account the protection area of non-direct electrical contact copper alloy, can improve the wettability and interface bonding stability in the hot-dip plating process of the non-ferrous metal part, and improve the coverage of complex structure area, salt mist corrosion resistance and cold-hot cycle stability.

The utility model relates to the technical field of vamps, and discloses an impact-resistant wear-resistant vamp which comprises a vamp body, toe protection blocks are fixedly connected to the outer wall of the vamp body, air holes are formed in the vamp body, flexible supporting strips are fixedly connected to the outer wall of the vamp body, outer-layer wear-resistant mesh cloth is arranged in the vamp body, and the outer-layer wear-resistant mesh cloth is arranged in the vamp body. The bottom of the outer-layer wear-resistant mesh cloth is fixedly connected with an anti-impact buffer layer, and the bottom of the anti-impact buffer layer is fixedly connected with an inner-side comfortable layer. According to the utility model, the impact force is dispersed through the foaming polyurethane buffer layer and the crossed supporting strips, so that the pressure on the feet during exercise is reduced, and the fatigue feeling is reduced; the hard protection blocks further protect the toes and avoid external force damage, the effect of improving the impact resistance is achieved, the problem that when a shoe is worn, supporting force is weak, and the shoe is prone to being damaged when being collided is solved, and the impact resistance of the vamp is improved.

The application belongs to the technical field of textile fabric functional finishing, and particularly relates to a preparation method of super-hydrophobic fabric. The preparation method of the super-hydrophobic fabric comprises the following steps: pretreating cotton fabric by using a zinc ion mixed solution of sodium hydroxide to obtain cotton fabric containing a zinc oxide seed layer; then immersing the cotton fabric containing the zinc oxide seed layer in a mixed solution of a zinc nitrate aqueous solution and a hexamethylenetetramine aqueous solution to obtain a ZnO composite fabric; and finally using the bridging effect of a mercapto silane coupling agent to bond low-surface-energy polydimethylsiloxane and octavinyl octasilsesquioxane to the cotton fabric to obtain the super-hydrophobic fabric. The above method can endow the fabric with excellent hydrophobicity and improve the washing resistance of the hydrophobic effect.

The application relates to the technical field of coatings, in particular to a super-biporous coating finish, a coating and a preparation method thereof. The super-biporous coating finish provided by the application is a modified nanoparticle dispersion liquid with a solid content of 5-15%, wherein the modified nanoparticles are obtained by modifying nanoparticles with fluorosiloxane and azo epoxy siloxane. The application forms the finish by treating the nanoparticles with a treating agent containing an epoxy group and an amino group, the treated nanoparticles can react with a curing agent and a resin group in a base material, the chemical bond energy formed is much greater than that of a hydrogen bond, and the combination stability of the coating and the base material is effectively improved.

The invention relates to a two-dimensional metal material for an ultraviolet photoelectric detector and a preparation method of the two-dimensional metal material, and belongs to the technical field of detector preparation, a sapphire substrate is activated through high-activity particles through plasma treatment, hydroxyl active sites are introduced, a clean interface foundation is laid for heteroepitaxial growth of an ultra-wide forbidden band Ga2O3 film, and the performance of the detector is improved. The method comprises the following steps: performing chemical vapor deposition on Ga2O3 to ensure the specific absorption capacity of Ga2O3 to ultraviolet light, annealing in a mixed atmosphere after chemical vapor deposition, repairing the oxygen vacancy defect of a Ga2O3 film by using the high activity of ozone, improving the crystallization quality, effectively reducing dark current noise, and performing in-situ growth of a WSe2 layer in a high vacuum environment through a pulse laser deposition technology to form a van der Waals heterojunction without lattice mismatch. And an efficient carrier separation channel can be constructed by virtue of energy level matching of WSe2 and Ga2O3, so that the problem that ultraviolet absorption and carrier transmission are difficult to consider by virtue of a single material is solved, and the light response capability of the device is remarkably enhanced.

The utility model relates to a detachable primary and secondary riveting nail, which belongs to the technical field of wallboard assembly and comprises a primary riveting nail penetrating through a heat insulation board, and one end of the primary riveting nail is fixedly connected with a baffle parallel to the heat insulation board and abutted against the side wall of the heat insulation board. A plurality of limiting teeth inclining in the direction close to the baffle are arranged on the outer side wall of the primary riveting nail, when the primary riveting nail penetrates through the heat preservation plate, the limiting teeth abut against the side wall of the heat preservation plate, and a secondary riveting nail arranged in the length direction of the primary riveting nail is arranged at the end, close to the baffle, of the primary riveting nail. And a connecting assembly for connecting the secondary riveting nail and the primary riveting nail is arranged between the secondary riveting nail and the primary riveting nail. The method has the effect of reducing the adverse effect on the combination stability of the heat preservation layer and the corresponding light aggregate layer.

This invention discloses a method for preparing a zirconium-based MOF enzyme-mimicking catalytic membrane, mainly comprising: using a hydrolyzed polyacrylonitrile ultrafiltration membrane as a base membrane, and pre-modifying the base membrane with a polydopamine coating; loading UiO-66-NH2 with phosphotriesterase-like catalytic function onto the pre-treated hydrolyzed polyacrylonitrile ultrafiltration membrane via pressure-assisted self-assembly, resulting in a UiO-66-NH2 loading of 0.71-1.42 mg / cm³. 2 A zirconium-based MOF enzyme-mimicking catalytic membrane was prepared. Compared with powdered UiO-66-NH2, the catalytic membrane prepared in this invention solves the problems of easy agglomeration and difficult separation of nanocatalysts in heterogeneous reactions, and improves the dispersibility, stability and reusability of the catalyst. The inherent pores of UiO-66-NH2 nanoparticles and the interstitial pores formed by stacking ensure that it has excellent water flux and catalytic effect while maintaining high loading, thus achieving effective removal of MPO.

The utility model relates to a sun visor support spring assembly and a sun visor in a vehicle, which is used for cooperating with a sun visor rotating shaft and comprises a clamping plate, an arc-shaped elastic clamping plate and a fixing plate, the clamping plate is provided with a positioning groove, the arc-shaped elastic clamping plate is provided with an arc-shaped convex surface, the arc-shaped elastic clamping plate is installed in the positioning groove, the arc-shaped convex surface is arranged opposite to the groove bottom wall of the positioning groove, the fixing plate is fixedly connected with the clamping plate, the fixing plate is in contact with the arc-shaped elastic clamping plate, at least one end of the arc-shaped elastic clamping plate is slidably matched with the fixing plate in the length direction of the positioning groove, the fixing plate is used for limiting the translation of the arc-shaped elastic clamping plate in the direction from the groove bottom to the groove opening of the positioning groove relative to the clamping plate, and the arc-shaped convex surface is matched with the positioning groove and is used for clamping the sun visor rotating shaft. It can improve the firmness and stability of the sun visor, is not prone to abnormal sound during use, can provide a good driving environment, and can prolong the service life.

The application discloses a kind of protective film base film surface pretreatment and adhesion promotion device, it is related to protective film base film processing field, including machine body, the outside one side of the machine body is provided with gas supply mechanism, the inside bottom of the machine body is provided with cleaning mechanism, the inside of the machine body is provided with filter mechanism, the inside of the machine body is rotatably installed with corona roller, the inner wall of the machine body is fixedly installed with two groups of discharge assembly matched with corona roller.The auxiliary rod of the cleaning mechanism is misaligned arrangement, and the base film is bent and immersed in cleaning solution, and the rubber roller and the sponge roller are matched with the opposite operation to complete the double-sided deep cleaning of the base film, so that the surface dust, oil stains and other impurities can be completely removed, and then the two groups of discharge assembly are used to complete the graded corona activation, and then directional suction filter mechanism is matched with circulating air drying structure to realize the green and efficient operation of the pretreatment process, and the two groups of filter components can directional suction ozone and colloidal pollutants generated by corona treatment.

The invention discloses a low-temperature-resistant marine environment ship alloy coating, and relates to the technical field of coatings, the coating is composed of a metal alloy, resin, a hole sealing agent and a modified additive, the modified additive comprises a nano metal oxide, a filler and a catechol-containing monomer, and the nano metal oxide, the filler and the catechol-containing monomer interact through specific functional groups to form a stable cross-linked network. The components have a synergistic effect, the metal alloy provides mechanical support and an anti-corrosion foundation, the resin constructs a compact film-forming structure, the hole sealing agent blocks permeation of a corrosive medium, and the modified additive strengthens the low-temperature-resistant toughness, the interface bonding force and the anti-corrosion stability of the coating. The coating adapts to harsh conditions such as high salt mist and mechanical impact of low-temperature ocean, the problems that an existing coating is prone to cracking and falling off, and corrosion prevention fails are effectively solved, and long-acting stable protection is provided for ships.

The invention discloses a high-durability transparent super-oleophobic coating and a preparation method thereof.The preparation method comprises the steps that firstly, ethyl alcohol and isopropyl alcohol are mixed in proportion to form a mixed solvent, then fumed silica, aluminum oxide and titanium dioxide and zirconium oxide nano-particles are added into the mixed solvent, stirring is conducted, and the high-durability transparent super-oleophobic coating is obtained; stirring and dispersing to construct a uniform and stable inorganic particle dispersion system; then, PFOTS, TEOS and NH3.H2O are added into the dispersion liquid to be subjected to a hydrolytic condensation reaction under the stirring condition, surface modification of the inorganic particles is achieved, then, a silane sol type primer is prepared, the silane sol type primer and the modified suspension liquid are evenly sprayed to the surface of a carrier in sequence, and the carrier is obtained. And drying to finally form the coating with high transparency and excellent super-oleophobicity. The method is simple in process and high in controllability, and the obtained coating has excellent transparency, super-oleophobicity and stability and is suitable for surfaces of glass, optical elements and other base materials needing to maintain high transparency and anti-pollution performance.

The utility model discloses a surgical instrument for urinary incontinence suspension surgery, and belongs to the field of surgical operating instruments. The surgical instrument for the urinary incontinence suspension surgery comprises a net-shaped sling and a guide handle, a first retaining structure is arranged on the inner side wall of one end, close to a tip part, of a puncture cannula of the net-shaped sling, and a second retaining structure is arranged at the free end of a guide rod of the guide handle. According to the utility model, the first retaining structure on the puncture cannula and the second retaining structure on the guide handle are designed into spiral clamping structures which are matched with each other in a concave-convex manner or at least two rings of annular clamping structures which are matched with each other in a concave-convex manner; the spiral clamping structure or the multi-circle annular clamping structure is utilized to increase the combination firmness of the guide handle and the puncture cannula, the problem of accidental separation due to stress in the operation process is effectively prevented, and due to the increase of the combination positions, the separation probability caused by improper installation in the assembly process is reduced, and the service life of the guide handle and the puncture cannula is prolonged. And the operation success rate and the safety are greatly improved.

The utility model relates to the technical field of mine screens, and particularly discloses a novel wear-resistant mine screen which comprises a screen body, the screen body is composed of a plurality of screen wire frameworks, the section of each screen wire framework is in a solid U shape, and a wear-resistant layer is arranged on the top of each screen wire framework in a surfacing mode. The upper end and the lower end of the cross section are arc-shaped, and the middle part and the two sides of the cross section are vertical. According to the novel wear-resistant mine screen, the section of the screen wire framework is changed into the solid U shape, and the wear-resistant layer is overlaid on the top, so that on the premise of not changing the mesh number of the screen and the width of the screen wire, the longitudinal thickness of the screen wire is increased, the longitudinal shearing force of the screen main body is effectively improved, and the overall bearing capacity is enhanced; and high-strength impact in the mine screening operation can be better adapted. And the wear-resistant layer is only overlaid on the top of the screen wire framework without being completely wrapped in the circumferential direction, so that the wear-resistant property of key parts in contact with ores is ensured, the use amount of wear-resistant materials is reduced, and the production cost is effectively saved.

The invention relates to an integrated preparation method of a low-attenuation neodymium-iron-boron magnet, and belongs to the technical field of magnet preparation. Through the synergistic effect of heavy rare earth grain boundary diffusion modification and mixed plasma surface regulation, the inherent defects of magnetocrystalline anisotropy field reduction and grain boundary oxidation of the neodymium-iron-boron magnet at the high temperature are effectively overcome, and the magnetic performance stability of the magnet under the long-term high-temperature working condition is improved; a synergistic protection structure is formed by the double-layer coating film and the tin-titanium composite transition layer, so that the corrosion resistance and the wear resistance are remarkably enhanced, meanwhile, the bonding strength of the film layer and a matrix is improved, friction and vibration in the using process can be resisted, corrosion failure caused by film layer falling is avoided, and the service life of the magnet is prolonged; seamless connection between magnets is achieved through La-Ce rare earth alloy diffusion welding, the integrated magnetizing process is combined, the magnetic field distribution uniformity of the Halbach array magnet assembly is guaranteed, interface magnetic performance abrupt change points are eliminated, meanwhile, performance improvement and cost control are both considered, and good industrial application prospects are achieved.

The invention provides a zinc-rich heavy anti-corrosion coating and a preparation method thereof, and belongs to the technical field of coating compositions.The preparation method comprises the following steps that bisphenol A type liquid epoxy resin, zinc gluconate supported modified GO, a dispersing agent, a defoaming agent and a mixed solvent are mixed, fumed silica, polylactic acid and garnet composite powder and zinc powder are sequentially added and stirred, and a component A is obtained; mixing and stirring a polyamide curing agent and a curing accelerator to obtain a component B; mixing and stirring the component A and the component B, and defoaming to obtain the zinc-rich heavy anti-corrosion coating. According to the invention, the cathode protection effect and the shielding and blocking capability on a corrosive medium can be enhanced, so that the long-acting heavy corrosion resistance is improved.

The application discloses a preparation method of a magnetic fluorine-removing resin. The method comprises the following steps: step 1, preparing an oil-phase dispersible modified iron oxide magnetic material; step 2, preparing a water-phase for suspension polymerization; step 3, preparing an oil phase containing the magnetic material; step 4, forming an epoxy-group-containing magnetic resin skeleton through suspension polymerization; step 5, grafting a nitrogen-containing carboxylic acid functional structure through ring-opening of the epoxy group; step 6, loading a zirconium-based fluorine-removing active component; and step 7, washing and balancing and post-treatment.