36results about How to "Reduce compactness" patented technology

The invention belongs to the technical field of sludge drying and filter pressing, and discloses a sludge drying and filter pressing device which comprises a sludge spiral filter press, a conveying mechanism, a drying mechanism, a crushing mechanism and a discharging mechanism, the conveying mechanism is installed below one side of the sludge spiral filter press, the drying mechanism is arranged in the center above the conveying mechanism, one side of the sludge spiral filter press is connected with the smashing mechanism located above the conveying mechanism, and the discharging mechanism is arranged on a discharging port of the sludge spiral filter press; the discharging mechanism comprises a fixed shell; and the fixed shell is communicated with a discharging hole of the sludge spiral filter press. According to the design, the working intensity of the crushing mechanism can be reduced, mechanical fatigue is avoided, meanwhile, the degree of dispersing and thinning of the sludge by the crushing mechanism is improved, the sludge is more easily crushed by the crushing mechanism to be uniformly and fully loosened, blocky sludge is avoided, and therefore caking after subsequent drying is avoided.

The invention relates to the technical field of soil turning machines, and discloses a multifunctional mountain and hill soil turning machine which comprises a machine body. The soil turning mechanism is used for scarifying the land and crushing soil blocks; the soil loosening mechanism is used for smashing caked land before the land is turned over; and the reciprocating mechanism is used for reciprocating left and right when the caked land is smashed. According to the multifunctional mountainous and hilly soil turning machine, the soil loosening mechanism is arranged, a cam piece abuts against a bottom semicircular block when rotating, and under the action of a first spring, a supporting piece drives a sliding long strip block and a bottom soil loosening column to move up and down in a reciprocating mode, so that the bottom soil loosening column knocks the bottom land in a reciprocating mode, and hard soil blocks are crushed and loosened; the compactness of the soil is reduced, a softer soil structure is created for subsequent cultivation, and the soil turning effect and the working efficiency are improved. The problem that the power system of the rooter is difficult to effectively scarify and crush caked soil layers in mountains and hills is solved.

The invention relates to the technical field of dielectric energy storage device materials, in particular to high-entropy designed bismuth ferrite-based energy storage ceramic as well as a preparation method and application thereof, the chemical composition formula of the material is (0.7-x) Bi < 0.9 > (Sm < 0.5 > Gd < 0.5 >) < 0.1 > FeO < 3-0.3 > (Sr < 0.5 > Ba < 0.5 >) TiO < 3-x > NaNbO < 3-y > MnO < 2 >, the value range of x is 0-0.15, and the value range of y is 0-0.005. The relaxation ferroelectric material is designed by adopting a high-entropy strategy, and various elements occupy the same site of the material to generate lattice distortion, so that the relaxation characteristic of bismuth ferrite-based ceramic is promoted, and a ferroelectric hysteresis loop is optimized. The NaNbO3 anti-ferroelectric material is introduced, the long-range ferroelectric order is destroyed, the local random field is enhanced, and a low Pr value can be obtained. And in addition, the concentration of oxygen vacancies can be reduced by properly adding 0.5% mol of MnO2, so that the leakage current of the material is reduced, the energy storage efficiency is improved, and the material design not only enriches the application field of the high-entropy ceramic, but also provides a new thought for improving the performance of the energy storage ceramic.

The invention relates to a maintenance type sanitary towel and a preparation method thereof, and belongs to the technical field of sanitary towels. The microcapsule attached to the surface layer of the sanitary towel provided by the invention is prepared from composite chitosan and sodium carboxymethyl starch. Microcapsules attached to the surface of the sanitary napkin are prepared from pullulan in cooperation with composite chitosan and sodium carboxymethyl starch, and a good antibacterial effect and a proper release speed are kept under the condition that human body menstrual blood is acidic. The microcapsules are prepared into microcapsule-containing composite membrane liquid, the composite membrane liquid is sprayed on a non-woven fabric, and the non-woven fabric is used as a surface layer to prepare the maintenance type sanitary towel. The shea nut essential oil and the chitosan are used as raw materials to prepare the composite membrane liquid, so that gaps in the finally formed composite membrane are enlarged, holes are increased, the compactness of the chitosan composite membrane is reduced, and the chitosan composite membrane has good air permeability. In addition, due to the addition of the shea butter essential oil, the intermolecular acting force between the shea butter essential oil and the membrane is enhanced, and the water absorption rate of the finally formed composite membrane is improved.

The invention relates to the technical field of humic acid fertilizer preparation, in particular to a humic acid fertilizer preparation method and equipment, the equipment comprises a bottom plate and a pile body box for containing pile body raw materials, a material turning mechanism is arranged above the bottom plate, the material turning mechanism comprises a transverse seat, two electric telescopic rods are fixedly connected to the bottom of the transverse seat, and the bottom of the transverse seat is fixedly connected with the bottom of the electric telescopic rods. L-shaped plates are fixedly connected to the output ends of the electric telescopic rods, rotating rods are rotationally connected to the inner walls of the sides, away from each other, of the two L-shaped plates, and a cylinder is fixedly connected to the rear end of the rotating rod on the front side. In the fermentation process, pile raw materials can be turned over and ventilated in time, the pile raw materials can be forcibly filled with air in the turning-over process through the turning-over plate, gaps of the pile raw materials can be filled with the air, the compactness of a pile is reduced, and the fermentation efficiency is improved. The ventilation effect, the ventilation area and the ventilation area in the raw materials of the pile body are greatly increased, the materials can be uniformly fermented, and the fermentation efficiency is improved.

The present invention discloses a multi-path internal microporous efficient refrigeration method and device for a frozen sand mold. The device includes a frozen sand molding chamber, an electric lifting platform, a teflon porous lining, a removable porous aluminum plate, a frozen sand mold refrigeration device box, a sealing cover plate, an ultrasonic piezoelectric sheet, a U-shaped condenser tube, an ultrasonic generator, and a low-temperature refrigeration system. The teflon lining and the removable porous aluminum plate are provided with through hole structures of the same size and shape for rapid cooling from the surface to core of molding sand. The lifting platform is opened and the bumpy-ridge teflon lining rises to a highest point to facilitate demolding. The high- and low-frequency dual mode of the ultrasonic piezoelectric sheet can be used for vibrating and compacting the frozen sand mold, and can also assist in cutting forming. The device can achieve rapid freezing of the frozen sand mold, convenient demolding, and low-cost digital forming.

The invention discloses a Ce-based alloy sputtering target and a preparation method thereof, the sputtering target comprises any one of Sm, Gd and Y, and further comprises Ce and inevitable impurities, the content range of the Sm, Gd or Y element is 5-25 atom%, the impurities comprise C, S and O, and the Vickers hardness of the sputtering target is greater than 35 Hv. The Ce-based alloy sputtering target provided by the invention solves the problems that the existing Ce-based alloy target is easy to oxidize in the sputtering process, the sputtering rate is unstable, the formed CeO2-based electrolyte film is not compact and the like.

The utility model discloses a novel linear motor module driver. The novel linear motor module driver comprises a main body bracket and a driving motor arranged at the lower end part of the main body bracket, a vertically-penetrating support through hole is formed in the core portion of the body support, a power output shaft of the driving motor is provided with a driving rotating shaft stretching into the support through hole, and the driving rotating shaft is provided with a rotating shaft protruding column protruding outwards in the radial direction. A movable block capable of moving up and down is embedded in a bracket through hole of the main body bracket; the upper end part of the movable block protrudes out of the upper end surface of the main body bracket; a first spiral spring is arranged between the movable block and the driving rotating shaft in the support through hole, the upper end of the first spiral spring is connected with the movable block in a fastening mode, the lower end of the first spiral spring abuts against the driving rotating shaft, and a rotating shaft protruding column of the driving rotating shaft extends into a screw pitch gap of the first spiral spring. By means of the structural design, the structure has the advantages of being novel in design, good in structural compactness and low in manufacturing cost.

The utility model relates to the technical field of compressors, in particular to a crankshaft which comprises a crankshaft body and an eccentric portion arranged on the crankshaft body, and the crankshaft body is provided with a shaft plane perpendicular to the direction, deviating from the crankshaft body, of the eccentric portion. The eccentric side part is located on one side of the shaft plane and deviates from the crankshaft body, the eccentric opposite side part is located on the other side of the shaft plane, and holes distributed in a dot matrix mode are formed in the eccentric side part. The utility model further relates to a damping device of the compressor, the damping device comprises the crankshaft and a piston arranged on the eccentric part of the crankshaft in a sleeving mode, and the overall mass center of the eccentric part and the piston is located on the rotating central axis of a crankshaft body. The utility model further relates to a compressor comprising the damping device. The holes distributed in the dot matrix mode are formed in the eccentric side portion, the mass of the eccentric side portion is reduced, the eccentric mass of the crankshaft eccentric portion can be reduced, the distance of the mass center of the crankshaft eccentric portion deviating from the rotating center axis of the crankshaft body is shortened, and the running stability of the compressor is improved.

The invention discloses a novel environment-friendly temperature-resistant fireproof coating and a preparation method thereof.The fireproof coating is prepared from, by weight, 10-13 parts of silicon carbide, 23-27 parts of silicate, 8-12 parts of kieselguhr, 6-8 parts of kaolinite, 10-12 parts of aluminum oxide, 6-9 parts of ceramic micro powder, 20-25 parts of sodium fluosilicate, 20-22 parts of acrylic emulsion and 15-18 parts of organic silicon resin. And 10-13 parts by weight of sodium zirconate and the like. The preparation method comprises the following steps: mixing silicon carbide, silicate, diatomite, kaolinite, aluminum oxide and ceramic micro powder to obtain mixed powder; mixing sodium fluosilicate, an acrylic emulsion, organic silicon resin, sodium zirconate, a diluent, a stabilizer, a suspending agent, an adhesive agent and a rust dissolving agent to obtain a mixed material liquid; during use, the mixed powder and the mixed material liquid are uniformly mixed. The technical problems that an existing fireproof coating is poor in high temperature resistance, short in continuous temperature resistance time and the like can be solved.

The present application relates to a kind of telescopic front baffle, telescopic screed and paver, belong to paver technical field.The telescopic front baffle includes first front baffle and second front baffle, first front baffle is hollow, second front baffle is inserted into first front baffle and can be transversely moved relative to first front baffle;First front baffle lower part has first pre-compaction surface;Second front baffle lower part has the pre-compaction ability to the second pre-compaction surface of paving material smaller than first pre-compaction surface, or does not have pre-compaction surface but has vertical surface, telescopic screed, including telescopic front baffle, paver includes telescopic front baffle;Paver includes telescopic front baffle or telescopic screed.The telescopic front baffle of the present application is conducive to controlling material level height and improving paving quality.

The application relates to the field of packaging heat dissipation technology, and provides a three-dimensional integrated active heat dissipation structure, which comprises an upper cover plate layer, an air inlet hole is arranged on the upper cover plate layer; a fan and pump layer is arranged below the upper cover plate layer; at least one liquid cooling flow channel layer is arranged below the fan and pump layer; a high-power device layer is arranged below the at least one liquid cooling flow channel layer; at least one vapor chamber layer is arranged on at least one surface of the high-power device layer; at least one heat conduction material layer is arranged between the high-power device layer and the vapor chamber layer; and a lower cover plate layer is arranged at the bottom of the whole structure. The structure can be combined by selecting and matching the air cooling layer, the single and double liquid cooling layers and the vapor chamber layer according to different high, medium and low power devices, and three-dimensional integration and synergic coupling of the air cooling, liquid cooling and solid heat conduction structure are achieved, so that three-dimensional heat management is realized.

The invention relates to the technical field of dam construction, in particular to a dam corbel prefabricated non-dismantling formwork which comprises a limiting assembly and a formwork body. Comprising a first embedded steel bar, a supporting frame arranged on the first embedded steel bar, a stabilizing rod arranged on the inner wall of the end of the supporting frame, a plate body arranged on one side of the supporting frame and a second embedded steel bar arranged at the bottom of the plate body. The supporting assembly comprises a tensioning piece, a supporting piece arranged on the tensioning piece and a knocking piece arranged between the tensioning piece and the plate body; wherein the supporting assembly is arranged on the limiting assembly. The structure has the beneficial effects that the connection looseness of the plate body and the second embedded steel bars caused by the pressure of liquid concrete on the plate body is avoided, the defects of unevenness, honeycombs or holes and the like of the concrete surface caused by the displacement of the plate body are prevented, and then the compactness and durability of a dam structure are prevented from being reduced; and the risk of dam damage is avoided.

The utility model belongs to the field of large cylindrical sodium ion batteries, and particularly relates to a full-tab large cylindrical sodium ion battery for improving liquid injection, which adopts the following scheme that the full-tab large cylindrical sodium ion battery comprises a shell, a roll core is fixedly assembled on the inner side of the shell, a negative electrode cover plate is fixedly assembled at the bottom of the shell, and a sealing plate is fixedly assembled at the bottom of the negative electrode cover plate; the winding core is formed by winding a pole piece and a diaphragm, the positive collector plate is welded with the positive end of the winding core, and the winding core comprises a winding core outer ring tab-free area, a winding core inner ring tab-free area and a full tab area. The contact area of the pole piece and the electrolyte is increased, the liquid injection process is improved, the roll core can absorb the liquid in a short time, the risk caused by poor liquid absorption is better improved, and compared with traditional mechanical rubbing, the compactness of the pole lugs stacked through laser die cutting and ultrasonic rubbing is low, and absorption of the pole piece to the electrolyte is also facilitated.

The invention relates to the technical field of aerogel, in particular to a silicon dioxide aerogel-aramid fiber composite material with gradient density and a preparation method of the silicon dioxide aerogel-aramid fiber composite material. According to the method provided by the invention, the aramid fiber and the SiO2 / POSS matrix are combined to form the composite insulating material with a three-dimensional interpenetrating network structure through the process steps of sol preparation, gradient gelation and directional forming, and meanwhile, Fe3O4 nanoparticles are modified on the aramid fiber, so that magnetic field regulation and control of fiber orientation are realized. According to the preparation method provided by the invention, the problems of weak interface bonding force, non-uniform fiber orientation and poor performance stability of the aramid fiber-SiO2 composite material in related technologies are solved.

The present application relates to the technical field of preparation of varistor dielectric materials, and specifically to a varistor dielectric material and a preparation method thereof, the method comprising: mixing the raw materials of the varistor dielectric material, and ball milling, drying, and stirring to obtain a spray slurry, and then spray drying to obtain a powder; filling the powder into a customized mold for dry pressing, placing it in a muffle furnace, heating it sequentially to a preset temperature range at different stage rates, and then keeping it warm, and discharging polyvinyl alcohol; placing the zinc oxide varistor green body after debinding in a high-temperature sintering furnace, and obtaining the heating power of the heater by analyzing the temperature distribution in the high-temperature sintering furnace, so that the zinc oxide varistor green body is evenly heated, and the temperature is raised to the sintering temperature to obtain the varistor dielectric material. The present application aims to ensure the uniformity of the microstructure of the varistor dielectric material.

The embodiment of the present disclosure provides a powder covering device for laser cladding and an operating method thereof, a rear side of a cladding machine tool is provided with a mechanical arm, one end of the mechanical arm is provided with a cladding head, a lower end of the cladding head is provided with a powder outlet nozzle, a lower side of the powder outlet nozzle is rotatably provided with a sealing cover, an upper side of one side of the cladding machine tool is provided with an anti-static fan, one side of the powder outlet nozzle is provided with a cladding base material cleaning mechanism, and the cladding base material cleaning mechanism comprises a driving ring motor, a fixed seat, a cladding base material cleaning mechanism electric telescopic cylinder, a cleaning ring, a driven gear and a driving gear. The present disclosure can solve the problem that when the powder is transported in the pipeline, frequent friction and collision between the powder and the pipeline wall will cause the transfer and accumulation of electric charges, thereby generating static electricity, and the static electricity adsorption will cause the powder to accumulate on the inner wall of the pipeline, reduce the effective conveying area of the pipeline, and thus reduce the conveying efficiency of the powder, and cause the coating thickness to be uneven.

The invention discloses a novel TiC-based high-wear-resistance composite material and a manufacturing method thereof, and relates to the technical field of wear-resistant alloy, the novel TiC-based high-wear-resistance composite material comprises the following raw materials by weight: 50-90 wt% of multi-element solid solution strengthened TiC-N i-Ta-Nb-Mo-V-Cr powder, 0.1-3.0 wt% of reduced molybdenum powder, 5.0-13.0 wt% of 70 ferromanganese powder, 0.1-3.0 wt% of reduced Ni powder, 0.1-3.0 wt% of carbon black, and the balance of iron powder. According to the TiC-based high-wear-resistance composite material manufactured through the scheme, multiple raw materials are combined to form multi-element solid solution strengthening, complete development of crystal grains can be promoted, the technical indexes of compactness, strength, hardness, toughness, impact resistance, wear resistance and the like of the crystal grains can be improved, and the defects that an existing TiC-based alloy is low in hardness, low in strength, poor in toughness, high in porosity, prone to abrasion, poor in wear resistance and the like are overcome.

The present disclosure provides a bacteriostatic method of a base station sewage tank and a base station, and relates to the technical field of cleaning equipment. The bacteriostatic method comprises the following steps: obtaining the temperature of the sewage tank; determining whether the temperature is higher than or equal to a first preset temperature; and when the temperature is higher than or equal to the first preset temperature, controlling a refrigeration mechanism to perform refrigeration and deliver cold energy to the sewage tank. In this way, when the temperature of the sewage tank is higher than or equal to the first preset temperature, the base station can automatically start the refrigeration mechanism to perform refrigeration and make the cold energy reach the inside of the sewage tank, thereby reducing the temperature of the sewage tank, inhibiting the growth and reproduction of microorganisms in the sewage tank, greatly reducing the probability of odor generation of the sewage tank, prolonging the cleaning interval length of the sewage tank, reducing the cleaning frequency of the sewage tank, and improving the user experience.

The present invention discloses a flame-retardant, thermal-insulating, and fireproof material for batteries, and relates to a silicone rubber flame-retardant and thermal-insulating material, which comprises a flame-retardant and thermal-insulating layer and an impact-resistant layer, wherein the flame-retardant and thermal-insulating layer comprises organic silicone rubber, a ceramic-forming filler, a flame retardant, an auxiliary agent, and glass powders with different initial melting temperatures, and molten-state temperature ranges of the glass powders cover 300 °C to 1500 °C. Various glass powders with different molten-state temperature ranges are added to the material, so that when being burned to form a ceramic layer in the temperature range of 300 °C to 1500 °C, the fireproof material always has glass powders in a molten state. The glass powders in the molten state can timely fill holes and cracks that appear at different temperatures in the ceramic layer, and ensure the continuity, integrity, and compactness of the ceramic layer as far as possible, so that the fireproof material has the characteristics of quick ceramic formation at a low temperature and high temperature resistance of about 1500 °C. The problems that the existing glass powder has a single molten-state temperature range, holes are produced in the ceramic layer due to gasification of the glass powder at a high temperature, the structural compactness is reduced, and the ceramic layer is easily burned through are solved.

The application discloses a structural ceramic material, a preparation method and application and a nozzle, and belongs to the technical field of the nozzle for the Yellow River water sprinkling irrigation. The structural ceramic material comprises a base and an added phase, wherein the base is (Ti, W)C, and the added phase is Ti3SiC2, and the structural ceramic material is prepared by adopting discharge plasma coupling high-frequency induction sintering. Ti3SiC2 uniformly dispersed in the (Ti, W)C base is used as a sintering aid, the good electric conductivity and high thermal conductivity of the Ti3SiC2 are utilized, the discharge sintering effect is strengthened and the heat conduction is accelerated, the sintering performance of the (Ti, W)C ceramic material is improved, sintering is completed at a lower sintering temperature, and the defect of poor high-temperature mechanical property caused by the traditional addition of a metal bonding phase as a sintering aid is overcome; the addition of the Ti3SiC2 can also improve the tribological property of the (Ti, W)C ceramic material, and the obtained structural ceramic material has excellent friction-reducing and wear-resistant properties, and is an excellent nozzle material for the Yellow River water sprinkling irrigation.

The invention discloses a drinking water preparing and filtering device and method based on a magnetized filter element, and relates to the technical field of filtering. A filter cartridge; a first filter plate, a second filter plate, a third filter plate and a fourth filter plate; the telescopic unit is arranged on the connecting base and used for driving the first filter plate, the second filter plate and the third filter plate to move in the direction away from the fourth filter plate, so that the shaftless spiral piece is in an elastic extension state. According to the invention, when foreign matters and impurities are cleaned, a telescopic unit drives a first filter plate, a second filter plate and a third filter plate to move in a direction far away from a fourth filter plate, so that a shaftless spiral sheet is elastically stretched and deformed, and gaps between activated carbon particles and magnetized particles are increased; foreign matters and impurities can flow out to the water outlet through gaps between the activated carbon particles and the magnetized particles, so that the foreign matters and impurities are removed, the replacement period of the filter element is prolonged, and the replacement frequency of the filter element is reduced.

The invention belongs to the field of chemistry and chemical engineering technology and environmental protection, and relates to an active fly ash-based catalyst and preparation and application thereof in liquid-phase advanced oxidative degradation of organic pollutants, the raw materials of the catalyst comprise a fly ash raw material, an alkali activator and alcohol, the mass ratio of the fly ash raw material to the alcohol is (0.5-10): 1, and the alkali activator is an alkali activator. The mass ratio of the fly ash raw material to the alkali activator is (0.1-5.0): 1. The preparation method mainly comprises two combined steps of alcohol-alkali ball milling and low-temperature melting, that is, firstly, fly ash is subjected to mechanical ball milling treatment in the presence of a certain amount of alkali and short-chain alcohol, and then the active fly ash catalyst is prepared through the steps of low-temperature melting roasting, washing, drying and the like. Compared with the prior art, the fly ash-based catalyst provided by the invention has the characteristics of greenness, high efficiency, mild conditions, simple process and easy large-scale production, other active metal components do not need to be additionally introduced into the activated fly ash, the cost is low, and the prepared catalyst also has the advantages of high activity, broad spectrum, good stability and the like.

This invention provides a fireproof and insulated door core and its filling process. The core is obtained by filling a door frame with a wet core material, followed by compression molding and curing. The wet core material, by weight, comprises: 4-12 parts closed-cell expanded perlite, 6-18 parts active magnesium oxide, 10-30 parts a 25%-35% (calculated as anhydrous magnesium sulfate) magnesium sulfate aqueous solution, 0.1-0.3 parts a modifier, 0.3-1.2 parts biomimetic interface hybrid modified reinforcing fibers, and 0.1-0.3 parts calcium stearate. The fireproof and insulated door core provided by this invention has low density and good thermal insulation performance, high matrix strength, density, and high-temperature stability, good flexural and impact resistance, low water absorption, good moisture resistance, and excellent overall fireproof and thermal insulation performance.

The present invention relates to a single wavelength angle pumped athermal and heat insensitive laser, which comprises a lens fixing group, an optical rotation group, a polarizing group, an electro-optical Q-switching group, an optical path adjustment group, a folding angle cone group, a bonding crystal group, an angle side pump module group, and a heat dissipation group. Two lens fixing groups are arranged side by side at one end of the laser, and the folding angle cone group is arranged at the other end of the laser. The upper lens fixing group and the optical rotation group, the polarizing group, the electro-optical Q-switching group, and the optical path adjustment group are fixed on the upper part of the laser in sequence, and the lower lens fixing group and the bonding crystal group are fixed on the lower part of the laser in sequence. The angle side pump module group and the heat dissipation group are both fixed around the bonding crystal group. When the angle side pump module group emits light, the light passes through the bonding crystal group and is reflected by the folding angle cone group, and then passes through the optical path adjustment group, the electro-optical Q-switching group, the polarizing group, and the optical rotation group in sequence, and finally emits from the upper lens fixing group.

The present invention discloses a method for optimizing a vertical flow folded plate flocculation tank, which belongs to the field of water treatment, including obtaining the flow field distribution at the bend of the folded plate through numerical simulation, selecting a streamline as a baseline in the flow field at the bend of the folded plate at each level of the flocculation tank, determining the water flow velocity at the inlet and determining the G value of each level of the flocculation tank; calculating the angle of the folded plate and the angle of the bending treatment according to the control equation, the standard turbulence model and the motion law of the micro-vortex; optimizing the angle of the folded plate and the bending treatment according to the calculated value in S2; observing the change of the G value when the angle of the folded plate and the bending treatment are differently matched in the numerical simulation experiment, and determining the final optimization of the folded plate and the pool wall. The present invention adopts the above-mentioned method for optimizing a vertical flow folded plate flocculation tank to optimize the flocculation effect of the flocculation tank, and has a good effect.

This invention relates to the field of flame retardants. To address the problem of uneven mixing in existing synergistic flame retardants during compounding, a method for preparing a synergistic flame retardant is provided, comprising: heating deionized water to 50-70°C, adding sodium hypophosphite solution and aluminum sulfate solution dropwise, controlling the initial pH value to 3.5-5.0, reacting for 1-2 hours, then heating to 70-85°C, adding a first coupling agent, and maintaining the temperature for 30-60 minutes to obtain modified aluminum hypophosphite; mixing the modified aluminum hypophosphite, multilayer coated red phosphorus, and the second coupling agent at 80-100°C to obtain the synergistic flame retardant; the mass ratio of modified aluminum hypophosphite to multilayer coated red phosphorus is (3-5):1; the outermost layer of the multilayer coated red phosphorus is an organic layer. This invention solves the problems of easy agglomeration of inorganic powders and poor compatibility with organic matrices by modifying aluminum hypophosphite. That is, it not only improves the uniformity of compound mixing, but also improves the compatibility of synergistic flame retardants when applied to organic matrices. When used in organic resin flame retardant systems, it has good mechanical properties.

The invention discloses a multifunctional hydrophobic and oleophobic concrete curing film agent as well as a preparation method and application thereof. The preparation method comprises preparation of a first-layer film agent and preparation of a second-layer film agent, the preparation of the first-layer film agent comprises the following steps: adding a polymer monomer, nano silicon dioxide, polycarboxylate, lauryl sodium sulfate, polyvinyl alcohol, a water reducing agent and an anti-ultraviolet agent into water, stirring to form an emulsion, adding an initiator under the protection of nitrogen, and carrying out a polymerization reaction to obtain the first-layer film agent; the preparation of the second-layer film agent comprises the following steps: adding a hydrophobic and oleophobic material, a silane coupling agent and a catalyst into a solvent, and uniformly stirring to obtain the second-layer film agent; the hydrophobic and oleophobic material comprises polydimethylsiloxane and polyvinylidene fluoride. The concrete curing film agent prepared by the invention has good effects of filling, permeating and repairing gaps, has multiple functions of water reduction, water resistance, oil resistance, hydrophobicity, crack prevention and the like, is durable in use stability, and effectively expands the use universality of the curing film agent.

The application relates to a high-dispersion carbon nanotube reinforced PTFE composite material and a preparation method thereof, relates to the technical field of polymer composites, and comprises PTFE powder, surface-modified carbon nanotubes and a composite dispersant; wherein the surface-modified carbon nanotubes are multi-walled carbon nanotubes modified by a fluorosilane coupling agent, and the composite dispersant is composed of polyethylene glycol octyl phenyl ether and potassium perfluorooctyl sulfonate. The application has the effects of realizing stable and uniform dispersion of carbon nanotubes in a PTFE matrix, enhancing interface bonding force, and not damaging the intrinsic properties of the carbon nanotubes.

The invention relates to a high-entropy metal connector spinel coating and a preparation method thereof, and belongs to the technical field of solid oxide batteries. According to the invention, the high-entropy metal connector spinel coating is obtained by adopting an in-situ preparation method of matrix pretreatment, target build-up and pre-sputtering, and sputtering deposition and thermal conversion. The high-density multilayer metal coating is prepared by using a magnetron sputtering technology, a spinel structure is formed in situ through thermal conversion, and the thickness of the coating is controlled by controlling sputtering deposition and thermal conversion cycle times. By setting key process parameters such as sputtering power, time, temperature and the like, the high-entropy oxidation coating which is compact in structure, high in binding force and excellent in high-temperature oxidation resistance is obtained.