15results about How to "Increase repulsion" patented technology

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 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 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.

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 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 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.

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.

The invention discloses a positioning structure of a logistics transportation skip car, and relates to the technical field of logistics transportation skip cars. Comprising a bottom plate, moving rods are connected to the surfaces of the two sides of the bottom plate through telescopic rods, restraining assemblies for limiting the two sides of goods are arranged above the two moving rods, each restraining assembly comprises a movable block, a sliding groove is formed in the bottom end of each movable block, and two moving blocks are slidably connected to the inner wall of each sliding groove; and a first spring is fixedly connected between the two groups of moving blocks. Through mutual cooperation of the restraining assembly and the positioning assembly, positioning and protection in the cargo loading and transporting process are achieved, meanwhile, through cooperation of a first magnetic block and a second magnetic block, the transverse inertia force generated when the transporting skip car is adjusted in the running posture such as turning and starting and stopping is reduced to a certain degree, and the transporting skip car is more stable. Risks of rollover, displacement or lateral sliding of the goods due to inertia are avoided, and flexibility and adaptability are high.

The utility model relates to the technical field of conveying, specifically relates to a welding wire reel conveying device, include: support connecting plate, conveying assembly, conveying assembly is fixed in the top of support connecting plate, conveying assembly includes two side -by -side arrangement's frame, and the transmission plate for conveying welding wire reel is fixedly installed between two frame and is inclined, the upper and lower ends of transmission plate form the feeding end and the discharging end with frame respectively, and the first rotating plate is rotatably connected between two frame, and the one end of first rotating plate is close to transmission plate is the material receiving end, and the other end is the inductive end. The utility model discloses through conveying welding wire reel simultaneously, slows down the speed of welding wire reel and avoids the impact, can avoid the mutual impact of the offset welding wire reel when conveying welding wire reel, and simultaneously corrects welding wire reel and restores normal rolling route to convey through the electrification of guide rod, electric contact and electrification plate.