38results about How to "Increase repulsion" patented technology

The invention relates to a preparation method of a high-hardness and high-sulfate-radical water quality scale inhibitor, and belongs to the technical field of water treatment.The preparation method comprises the steps that sodium carboxymethyl cellulose-sulfur quantum dots are prepared by using carboxymethyl cellulose as a stabilizer and then subjected to a copolymerization reaction with 2-acrylamido-2-methylpropanesulfonic acid and itaconic acid, and the high-hardness and high-sulfate-radical water quality scale inhibitor is obtained. The preparation method comprises the following steps: carrying out a reaction on sodium carboxymethyl cellulose and sulfur quantum dots to obtain modified sodium carboxymethyl cellulose-sulfur quantum dots, and carrying out a reaction on polysuccinimide, 4-amino phthalic acid and 2-aminoethanesulfonic acid to obtain a polyaspartic acid derivative; the modified sodium carboxymethyl cellulose-sulfur quantum dots and the polyaspartic acid derivative are mixed to serve as the scale inhibitor, the scale inhibition rate of the scale inhibitor is remarkably increased through the synergistic effect of the modified sodium carboxymethyl cellulose-sulfur quantum dots and the polyaspartic acid derivative, and meanwhile, due to the fact that a large number of new hydrogen bonds are generated between the modified sodium carboxymethyl cellulose-sulfur quantum dots and the polyaspartic acid derivative, the scale inhibition rate of the scale inhibitor is increased. The stability of a polymer structure is improved, so that the temperature resistance of the scale inhibitor is improved. The scale inhibitor is green and environment-friendly, and has excellent scale inhibition efficiency on high-hardness and high-sulfate-radical water.

The invention relates to the technical field of chemical reaction equipment, in particular to a reaction device for synthesizing high-molecular N-halamine resin, which comprises a viscosity adjusting mechanism, the viscosity adjusting mechanism comprises a detection plate for detecting viscosity, a first permanent magnet is embedded in the detection plate, a second permanent magnet is magnetically adsorbed by the first permanent magnet, and a second permanent magnet is embedded in the second permanent magnet; the top end of the second permanent magnet is provided with a magnetism isolating plate, and the top end of the magnetism isolating plate is fixedly connected with a conducting strip. The viscosity of the resin is fed back by detecting the movement distance of the detection plate, when the viscosity of the resin is increased, the friction force between the resin and the detection plate is also increased, the detection plate moves towards the side away from the connecting spring, and the movement drives the second permanent magnet and the conducting strip to slide on the resistance plate. And through a current monitor in the PLC, the current change of the slide rheostat can be detected, so that the viscosity of the resin is monitored in real time.

The invention relates to the technical field of pipe jacking construction, in particular to municipal road pipe jacking construction safety equipment which comprises a supporting piece, an inclined strut and a construction piece, the inclined strut and the construction piece are arranged on the two sides of the supporting piece respectively, one end of the inclined strut is fixedly connected to the ground, and the other end of the inclined strut is fixedly connected to the supporting piece; the construction piece is fixedly connected to the supporting piece. The construction piece applies force to the supporting piece, the inclined strut supports the supporting piece, the stability of the supporting piece is improved, deviation of the construction piece is reduced, and the construction quality is improved.

The invention provides a robot dynamic path planning method and system based on an improved artificial potential field algorithm, and relates to the technical field of robot path planning. Comprising the following steps: judging whether a robot collides with a dynamic obstacle, and delimiting a dynamic obstacle avoidance area; defining multiple layers of repulsive force potential fields in the dynamic obstacle avoidance area, and introducing an exponential function to calculate the repulsive force of each layer of repulsive force potential field; on the basis of the repulsive force of each layer of repulsive force potential field, the repulsive force of each layer of repulsive force potential field after enhancement is obtained by combining the relation between the movement direction of the robot relative to the obstacle and the obstacle velocity vector; and superposing the repulsive force of each layer of repulsive force potential field after reinforcement to obtain a total repulsive force field, updating nodes between the starting point and the ending point of the dynamic path and located in the dynamic obstacle avoidance area, and planning the dynamic path of the robot. By arranging the multiple layers of repulsive force fields and combining an exponential function, when the robot approaches an obstacle, the repulsive force is sharply enhanced, and collision is effectively avoided.

The invention discloses a high-flux nanofiltration membrane suitable for iodide ion separation as well as a preparation method and application of the high-flux nanofiltration membrane. The nanofiltration membrane is prepared by taking an ultrafiltration membrane or an ultrafiltration membrane modified by a porous MOF material as a base membrane, taking an ethylene derivative as a membrane preparation monomer and adopting an ultraviolet radiation grafting method. The maximum removal rate of the nanofiltration membrane to 100 mg / LI <-> reaches 95% or above, even if chloride ions or sulfate ions exist in a solution, the removal rate of the membrane to iodide ions is good, the flux is far larger than that of a reverse osmosis membrane, the maximum removal rate can reach about 45 L / m < 2 >. H under 0.6 MPa, the flux is large, water is used as a solvent in the whole preparation process, and the nanofiltration membrane is environmentally friendly and free of pollution. The method is suitable for removing iodide ions in wastewater containing radioactive iodide ions and water areas with high iodide ion content, and has a good application prospect.

The invention discloses efficient closed-pore high-stability slurry and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the technical field of lithium batteries, the efficient closed-pore high-stability slurry comprises water, core-shell microspheres, a heat stabilizer, a wetting auxiliary agent and a dispersing auxiliary agent, the core-shell microspheres comprise first core-shell particles and second core-shell particles, the core of the first core-shell particle is a mixture of a heat conducting agent and a flame retardant, or a composition of any one or more of the heat conducting agents, and the shell of the first core-shell particle is a mixture of a thermosensitive accelerator and a thermosensitive main agent, or a composition of any one or more of the thermosensitive accelerators; the core of the second core-shell particle is a mixture of a heat conducting agent and a flame retardant, or a composition of any one or more of the flame retardants, and the shell of the second core-shell particle is a mixture of a thermosensitive accelerator and a thermosensitive main agent, or a composition of any one or more of the thermosensitive main agents. The material has the advantages of early quick and synchronous response to temperature change, excellent thermal stability and excellent flame retardancy.

This invention relates to aqueous sols and organic solvent sols containing highly stable hollow silica particles, and further to methods for improving the stability of the aforementioned sols, which have suffered reduced storage stability, and methods for manufacturing such sols. To this end, a hollow silica sol is provided, containing hollow silica particles with spaces within the outer shell and monovalent alkali metal ions, wherein the molar number of these monovalent alkali metal ions, converted to M₂O (M representing a monovalent alkali metal atom), is 7.12 × 10⁻⁶ moles of SiO₂ in the hollow silica particles. ‑6 ~285×10 ‑6 The sol contains hollow silica particles and monovalent alkali metal ions in a specific ratio. After being stored at 50°C for 48 hours, the average particle size measured by dynamic light scattering (DLS) is within 2.0 times that of the average particle size measured by DLS before storage. The average particle size measured by DLS is 20–150 nm. A stabilization method involves adding monovalent alkali metal ions to the hollow silica sol, where the DLS particle size value is larger than that during manufacturing, in the aforementioned ratio of monovalent alkali metal ions to SiO2 in the hollow silica particles, thereby reducing the increased DLS particle size value.

The present application relates to a kind of emulsion type capsule slow-release oil sand dissociation agent and its preparation method and application, belong to oil sand pitch technical field.Dissociation agent is by the water phase flocculating agent solution of volume ratio (10~30) and the oil phase containing emulsifier mixed and formed water-in-oil emulsion;Water phase flocculating agent solution includes the flocculating agent of concentration 10~100 mg / L, and the oil phase containing emulsifier includes the emulsifier of volume concentration 1~4%.By oil outer phase, the viscosity of pitch and oil-water interfacial tension are reduced, the calcium and magnesium ion concentration in system can be reduced after slow release of flocculating agent solution, and then the adhesion between pitch and silicon surface is weakened, on the basis of reducing the dosage of flocculating agent, further improve the dissociation efficiency of pitch on sand surface.It can not change the pH of system, prevent the disadvantage that the hydrophobicity of pitch is reduced and the difficulty of pitch droplet coagulation is increased by hot lye.

The present invention proposes a robot dynamic path planning method and system based on an improved artificial potential field algorithm, and relates to the field of robot path planning technology. It includes judging whether the robot will collide with a dynamic obstacle and defining a dynamic obstacle avoidance area; in the dynamic obstacle avoidance area, defining multiple layers of repulsive potential fields, and introducing an exponential function to calculate the repulsion of each layer of repulsive potential fields; on the basis of the repulsion of each layer of repulsive potential fields, combining the relationship between the movement direction of the robot relative to the obstacle and the obstacle velocity vector, obtaining the repulsion of each layer of repulsive potential fields after strengthening; superimposing the repulsion of each layer of repulsive potential fields after strengthening to obtain the total repulsive field, and updating the nodes between the starting point and the end point of the dynamic path and located in the dynamic obstacle avoidance area, and planning the dynamic path of the robot. The present invention sets a multi-layer repulsive field in combination with an exponential function, so that the repulsion of the robot is sharply enhanced when it approaches an obstacle, effectively avoiding collisions.

The invention belongs to the technical field of flow batteries, and relates to an electrolyte containing a polyanionic electrolyte additive and a flow battery. Comprising a viologen compound, a supporting electrolyte, a solvent and a polyanionic electrolyte additive, the polyanionic electrolyte additive accounts for 0.1%-20% of the electrolyte in percentage by mass; molecules of the polyanionic electrolyte additive are rich in various functional groups with negative charges, and the polyanionic electrolyte additive is used for interfering the pi-pi accumulation behavior of viologen molecules; the polyanionic electrolyte additive is a polymer containing a repetitive unit, and is sodium polystyrenesulfonate, sodium polyacrylate, poly (2-acrylamido-2-methyl sodium propanesulfonate) or sodium alginate. By introducing a polymer carrying high-density negative charges in the structure or aggregated inorganic anions, multiple regulation and control effects on viologen molecules in a water-phase environment are realized, aggregation behaviors of reduced molecules of the viologen molecules are remarkably inhibited, and chemical and electrochemical stability of the electrolyte is improved.

This application relates to the field of catalyst technology, disclosing an electron-rich Pd nanocatalyst, its preparation method, and its application. The electron-rich Pd nanocatalyst comprises a sheet-like Mg(OH)₂ support and Pd nanoparticles uniformly loaded on the sheet-like Mg(OH)₂ support; wherein the thickness of the Mg(OH)₂ sheet is less than 2 nm; and the average particle size of the Pd nanoparticles is less than 4 nm. The preparation method includes dispersing the Mg(OH)₂ support in water, sequentially adding a palladium source and urea, refluxing at 55-65°C to obtain a precursor solution; adding a reducing agent to the precursor solution to carry out the reaction, collecting the solid deposit, washing, and drying to obtain the final product. This application, by regulating the electronic structure of the Pd nanoparticles, significantly increases the electron density on their surface, increasing the repulsion of reaction products, weakening the adsorption of reaction products on the catalyst surface, avoiding poisoning of the catalyst active sites, and improving the reactivity and selectivity of the Pd nanocatalyst for the hydrogenation of nitrile compounds at low temperatures.

The utility model relates to a sewage treatment equipment for environmental protection engineering belongs to sewage treatment technical field, in order to solve the problem that the bubble diameter generated by traditional aeration is usually larger, the rising speed is faster, the oxygen utilization rate is lower, and cannot form the full mixing with sewage, the utility model discloses sewage treatment tank and the oxygen cavity of opening in sewage treatment tank inside, sewage treatment tank both sides are installed with pump body, a plurality of jet elements are fixedly installed in the oxygen cavity, and the pump body is communicated with a plurality of jet elements through the pipeline, and the one end of jet element is installed with suction shell, and the one side of suction shell is communicated with the water outlet pipe, and the rotating part is installed in the water outlet pipe, the utility model discloses through the treatment of jet breaking and rotary shearing, the bubble diameter is significantly reduced, and the specific surface area is greatly increased, and the rising path of bubble is changed by swing plate, prolongs its residence time in sewage, makes oxygen have more sufficient time to dissolve, effectively solves the problem that the oxygen utilization rate of traditional aeration is low.

The invention discloses a preparation method of a high-performance titanium dioxide film, which comprises the following steps: firstly, preparing titanium dioxide colloid by using a sol-gel method, and adding an anionic surfactant sodium 1-octanesulfonate in the process of preparing TiO2 sol to increase the repulsive force among colloid particles so as to prevent the colloid particles from gathering and settling and improve the stability of the colloid; and then selecting a silicon wafer with a P-type (100) crystal face as a bottom selection, spin-coating, and carrying out heat treatment to obtain the titanium dioxide film. The silicon wafer has high carrier (electron and hole) mobility, so that the conductivity of the material is improved; the structure has high flatness and lattice parameter consistency, and the repeatability in the preparation process is improved. The preparation method is convenient to operate, simple in equipment and low in cost, and the prepared titanium dioxide film is high in stability, tight in combination with the substrate, high in piezoelectric constant and outstanding in catalytic performance and has wide application prospects in the fields of sensors, environmental pollution control and artificial intelligence.

The invention discloses dinotefuran water dispersible granules and a preparation process thereof, and relates to the technical field of medicament production, and the dinotefuran water dispersible granules comprise dinotefuran raw medicine, a dispersing agent, a wetting agent, an auxiliary agent, a cosolvent, a synergist, a binder, a water-based carrier and a filler in a weight ratio of (10-50): (10-20): (1-3): (2-5): (5-10): (1-3): (2-5): (10-30): (1-3). The preparation method of the binder comprises the following steps: reacting hydroxyethyl cellulose with lauryl sodium sulfate at 60-80 DEG C for 2-4 hours to obtain a grafted product; and carrying out a cross-linking reaction on the grafted product and a calcium citrate complex at 60-90 DEG C for 1-3 h, cooling the reaction product to room temperature, and successively carrying out filtration and centrifugation treatment to obtain the binder. The stability and dispersity of the medicament are greatly improved, and the efficacy of the medicament is improved.

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 invention provides a silicon carbide polishing solution based on a phosphoric acid-sodium dihydrogen phosphate buffer solution system. The polishing solution comprises the following components: modified cerium oxide abrasive particles, a phosphoric acid-sodium dihydrogen phosphate buffer solution, phosphorus-containing heteropoly acid, an oxidizing agent and water, the pH value is 2.5 to 3.5. According to the polishing solution disclosed by the invention, phosphoric acid and sodium dihydrogen phosphate are simultaneously used as a system pH regulator and a dispersing agent, so that the system is uniformly dispersed, meanwhile, the pH stability can be well maintained in a chemical mechanical polishing process, and the quality and the performance of the silicon carbide polishing solution are greatly improved. Besides, by adopting siloxane surface modified cerium oxide abrasive particles and an inherent adsorption mechanism containing phosphorus heteropoly acid, scratches in the polishing process can be reduced while the dispersity of the abrasive particles can be improved, the roughness of the surface of silicon carbide is reduced, and the polishing efficiency of the silicon carbide substrate can reach the industry leading level by adopting the polishing solution disclosed by the invention.

The invention relates to the technical field of industrial cooling water treatment, and particularly discloses a method for treating and recycling cooling water, compared with an existing scale inhibitor, the composite scale inhibitor provided by the invention has the characteristics of high efficiency and environmental protection, does not adopt any phosphorus-containing substance in the components, does not cause secondary damage to water quality, and has a good application prospect. Under the synergistic effect of a plurality of components, scale-forming particles such as high-concentration calcium ions and magnesium ions can be dispersed under the condition that the usage amount is very small, and the scale inhibitor has an excellent scale inhibition effect; the composite copolymer provided by the invention can form a very strong coordination effect with the surface of the steel, in the corrosion process, carboxymethyl chitosan and a double bond addition reaction product can form a compact and stable polymer film on the surface of the steel, and under the combined action of carboxymethyl chitosan and the double bond addition reaction product, a corrosion phenomenon caused by direct contact between a corrosion medium and the surface of the steel is prevented; the metal is protected from being corroded by harmful media, and a good corrosion inhibition effect is achieved.

The invention discloses an additive composition for coal water slurry, and belongs to the technical field of coal chemical industry. The additive composition for the coal water slurry, provided by the invention, comprises lignosulfonate, inorganic salt and an acid-base regulator. According to the invention, lignin is grafted and sulfonated, such that lignosulfonate with high relative molecular mass is prepared. The specific preparation method comprises the following steps: by taking lignin as a raw material, reacting with formaldehyde, acetone and sodium sulfanilate under normal pressure, and introducing a sulfonated branched chain into a lignin molecular structure, so as to prepare the high-sulfonation-degree comb-shaped branched-chain lignosulfonate with the molecular weight of 10000-50000 Da. The lignosulfonate, the inorganic salt and the acid-base regulator are added into the coal mill and mixed with the coal or / and the coal coke or / and the petroleum coke and the water for grinding to prepare the coal water slurry, so that the flowability and the stability of the coal water slurry are improved, the viscosity of the coal water slurry is reduced, and the concentration of the coal water slurry is improved.

The invention relates to the technical field of marine equipment antifouling, in particular to a preparation method and application of an electrostatic repulsion antifouling coating material, and the preparation method comprises the following steps: S1, adding quantitative fluorinated graphene and tetraethylammonium chloride into organic silicon resin, grinding and dispersing uniformly to obtain a dispersed resin matrix; s2, dimethyl silicon dioxide and a silane coupling agent KH580 are added into the resin matrix obtained in the step S1 to be evenly mixed, and the antifouling coating material is obtained.The water medium and the surface of the antifouling coating material are in frictional contact for electrification, an electrified surface is formed, repulsive interaction is generated, and therefore antifouling is achieved, and the antifouling coating material can be suitable for the marine environment and has good application prospects. And the FG on the surface of the coating has high stability, is non-toxic and harmless, and is very environment-friendly.

A method for preparing an ammonia nitrogen-rejecting reverse osmosis membrane based on a support layer with controllable amination degree is disclosed. This invention aims to address the problem of poor selective separation performance of ammonia nitrogen in reverse osmosis membranes prepared based on inert support layers. The method comprises: 1. Synthesizing APAEPO polymer with controllable amination degree; 2. Preparing a polymer support layer with controllable amination degree using a solvent-inducible phase inversion method; 3. Preparing an ammonia nitrogen-rejecting reverse osmosis membrane using interfacial polymerization. This invention allows for flexible control of the membrane's ammonia nitrogen rejection rate (92.2%~99.1%) and water flux by adjusting the amination degree of the support layer (0-80%), meeting the needs of different reclaimed water treatment scenarios (such as low-ammonia nitrogen wastewater reuse and high-ammonia nitrogen wastewater deep purification), thus having a wide range of applications. The preparation process of the amination polymer in this invention does not require the introduction of toxic modifiers, the polymerization reaction conditions are mild, secondary pollution is minimal, and it can be directly industrialized.

The invention relates to the technical field of drying equipment, and discloses recycling inorganic pigment freeze-drying equipment which comprises a bearing frame and a positioning piece in transmission connection with the output end of a motor, a stirring piece is arranged at the bottom end of the positioning piece, and a positioning frame is fixedly connected to the outer surface of the circumference of the positioning piece; the bottom end of the positioning frame is fixedly connected with a limiting piece for limiting the bearing piece, a supporting piece is arranged at the bottom end of the limiting piece, and the bottom end of the supporting piece is fixedly connected with the other positioning piece. The stirring device is provided with a stirring piece and an adjusting piece, a magnetic piece moves upwards to be gradually away from a magnetic strip, and the magnetic strip is not attracted by the magnetic piece till a nut block is in threaded connection with a reciprocating lead screw; the blades slightly stir the freeze-dried inorganic pigment in the bearing piece, so that the contact positions of pigment particles with air and the container wall are continuously changed, and the temperature returning speed is increased.

The application discloses a preparation method of a positively charged nanofiltration membrane based on a strong electrolyte monomer, the nanofiltration membrane and application, and relates to the technical field of membrane separation. The positively charged nanofiltration membrane for magnesium / lithium ion separation is obtained by taking a cationic strong electrolyte monomer as an aqueous monomer and performing an interfacial cross-linking reaction of the strong electrolyte monomer with trimesoyl chloride on the surface of an ultrafiltration membrane. The strong electrolyte monomer adopted in the application contains a positive charge group and a reactive amino / hydroxyl functional group at the same time, and the prepared positively charged nanofiltration membrane has a high flux and can effectively separate magnesium ions and lithium ions. The preparation method provided by the application is simple in process and easy to operate, provides a reference direction for preparing a high-performance positively charged magnesium-lithium separation nanofiltration membrane, and has a good application prospect.

The application discloses a kind of solventization electron initiation controlled radical polymerization method of cosolvent regulation, this polymerization method uses higher polymerization temperature and adds cosolvent tetrahydrofuran simultaneously to regulate, solventization electron initiation polymerization still can keep the nature of controlled radical polymerization, can prepare molecular weight precision controllable, narrow molecular weight distribution polymer, and accurate structure block, star and various topological structure polymers such as polymer.The solventization electron initiation controlled radical polymerization method of cosolvent regulation of the application, it includes the following steps: in the solventization electron initiation polymerization system of alkali metal lithium / hexamethylphosphoramide to olefin monomer, adding cosolvent, carrying out controlled radical polymerization, improve polymerization rate and obtain narrow molecular weight distribution polymer;Wherein, the cosolvent is tetrahydrofuran, the dosage of hexamethylphosphoramide is 20mL, the dosage of tetrahydrofuran is 3-6mL, and the polymerization temperature is 50-60 DEG C.

The invention relates to the technical field of pesticide preparation, in particular to modified polyglutamic acid for a pesticide suspending agent and a preparation method thereof.The modified polyglutamic acid is prepared from a microcapsule A, a microcapsule B and a particle additive, and the microcapsule A is prepared from chitosan, gamma-polyglutamic acid and abamectin; the microcapsule B is prepared from gamma-polyglutamic acid, polyvinyl alcohol, nano silicon dioxide and abamectin; the particle additive is prepared from modified polyglutamic acid, sodium dodecyl benzene sulfonate, abamectin and carboxymethyl cellulose; the microcapsule A and the microcapsule B play a slow release role, the action time is prolonged while the pesticide suspending agent can take effect as soon as possible, the particle additive can increase repulsive force among particles and prevent flocculation and aggregation among the particles, the microcapsule A, the microcapsule B and the particle additive are synergistically promoted to jointly improve the performance of the pesticide suspending agent, and the microcapsule has a wide application prospect.

The invention discloses amorphous spherical silica micropowder and a preparation method thereof, and the method comprises the following steps: mixing an emulsifier and a cosurfactant, and then sequentially adding a cationic surfactant and an organic solvent to form a transparent solution; dropwise adding a catalyst, which is a mixed solution of ammonia water and triethylamine, into the transparent solution until the solution becomes turbid, and then forming a water-in-oil microemulsion through a high-speed shearing emulsifying machine; under the condition that the temperature is 20-30 DEG C, dropwise adding organosilane into the water-in-oil type microemulsion, and carrying out hydrolysis reaction; and then carrying out flocculent precipitation, centrifugal separation, washing, drying, calcining and post-stage modification to prepare the silicon dioxide powder with smooth surface and uniform granularity. By controlling the ratio of organosilane to the emulsifier to the cosurfactant, the rotating speed during emulsification and the addition amount of the modifier, the submicron spherical silicon dioxide with uniform particle size distribution is obtained, the generation of holes is avoided, and the product yield is improved.

The utility model relates to an electromagnetic switch and storage box, including electromagnet subassembly and permanent magnet subassembly, electromagnet subassembly includes at least two in first direction sequential interval arrangement's magnetic core, wherein two adjacent magnetic core is first magnetic core and second magnetic core, and the first magnetic core and second magnetic core are wound with coil, and permanent magnet subassembly has at least first magnetic pole, second magnetic pole, third magnetic pole and fourth magnetic pole.

The invention relates to the technical field of natural gas hydrate exploitation, in particular to multifunctional filling particles for sand prevention and yield increase of a hydrate reservoir and a preparation method and application of the multifunctional filling particles. The preparation method comprises the following steps: S1, fully dissolving a certain amount of the anionic polymer X in water, then adding a solution or emulsion of the fluorine-containing polymer Y, and uniformly mixing to obtain the coating liquid. And S2, pouring the filling particles into the coating liquid, and stirring and coating for a certain time to obtain the surface-modified multifunctional filling particles. And S3, washing, filtering and drying the multifunctional filling particles to obtain the multifunctional filling particles. The coating liquid is prepared in a manner of directly mixing the fluorine-containing polymer and the anionic polymer, the surface of the filling particle is coated with the hydrophobic and electronegative multifunctional material through in-situ direct coating, the liquid adsorption effect on the surface of the particle can be reduced, fluid output is effectively promoted, the particle surface repulsive effect is enhanced, and the filling effect is improved. And mud and sand gathering and blocking are effectively prevented.

The invention discloses a method for constructing a high-performance flexible interdigital supercapacitor and an integrated circuit by using chlorine / bromine doped graphene nanosheets, the ultra-stable chlorine / bromine doped graphene nanosheets are prepared by using a one-step graphite electrocorrosion technology, and the doping proportion of chlorine / bromine in the graphene nanosheets can be adjusted by optimizing the concentration of ammonium halide. And performing reduced pressure filtration on the graphene nanosheet aqueous solution to form a graphene electrode pattern in a hollow area of the metal template, transferring the graphene electrode pattern to a high-molecular transparent substrate, and smearing an aqueous gel electrolyte on the electrode pattern to manufacture the series-parallel connection arbitrary combination integrated circuit. The surface charge distribution is improved by constructing a nanosheet structure and introducing a carbon-halogen bond, so that the dispersity of graphene in water is remarkably improved, the stability of a graphene aqueous solution is greatly improved, the stacking problem in the service process of a graphene electrode is avoided, the cycling stability of the flexible interdigital supercapacitor is improved, and the flexible interdigital supercapacitor has a good application prospect. The constructed flexible interdigital supercapacitor has very good mechanical flexibility, flexible assembly of an integrated circuit can be realized by connecting the interdigital electrodes on the flexible substrate in series and in parallel, and power supply support is provided for various electronic devices. The whole construction process is simple and convenient, the repeatability is good, and no metal current collector, conductive agent or polymer adhesive is used.

The invention discloses a buffering device for elevator car roof rushing in the technical field of elevator equipment. The buffering device comprises a plurality of buffering assemblies. The buffering assembly comprises a rectangular sliding rail fixed to the wall of the elevator shaft, two movable plates sliding in the vertical direction are connected into the sliding rail in a sliding mode, the two movable plates are arranged side by side and are the first movable plate and the second movable plate in sequence from bottom to top, and a plurality of vertical tension springs are fixed to the lower surface of the first movable plate. The bottom end of each tension spring is fixedly connected with the bottom of the sliding rail, a plurality of first jacking springs are arranged between the first movable plate and the second movable plate, the bottom ends of the first jacking springs are fixedly connected with the first movable plate, the top ends of the first jacking springs are fixedly connected with the second movable plate, and a plurality of vertical second jacking springs are fixedly connected to the upper surface of the second movable plate. The top end of the top spring II is fixedly connected with the top end of the slide rail; a transversely-arranged contact plate is fixedly connected to the first movable plate and used for making contact with the lift car when the lift car rushes to the top. According to the scheme, the impact force generated when the lift car is in contact with the buffering device when rushing to the top is reduced.

This application discloses an ultra-long-distance pumped concrete and its preparation method. The concrete comprises the following raw materials in parts by weight: 140-160 parts cement, 780-810 parts fine aggregate, 900-1100 parts coarse aggregate, 180-210 parts mineral powder, 80-90 parts fly ash, 160-180 parts water, 4-8 parts high-flowability modifier, and 2-4 parts polycarboxylate superplasticizer. The high-flowability modifier contains amide groups on its molecular chain. The high-flowability modifier forms a three-dimensional adsorption structure on the surface of cement particles, with large steric hindrance, effectively preventing the aggregation of cement particles, improving the dispersibility of the concrete, and significantly enhancing its fluidity. In the middle and later stages, the amide groups gradually hydrolyze, gradually consuming the excess free water in the concrete, inhibiting segregation. The formed cross-linked network structure can continuously maintain the dispersibility of the system.