13results about How to "Reduce agglomeration" patented technology

The invention relates to the technical field of powder surface modification and functional modification, in particular to surface-treated silver-containing conductive powder and a preparation method and application thereof.The preparation method comprises the steps that an alcohol solvent, water, a silane coupling agent and an organic acid catalyst are mixed, obtained hydrolysate is mixed with the silver-containing conductive powder, and modified conductive powder is obtained; and mixing stearic acid with an organic solvent, and mixing the obtained coating liquid with the modified conductive powder to obtain the surface-treated silver-containing conductive powder. Different kinds of silane coupling agents are combined on the surface of the silver-containing conductive powder in a chemical bond mode through wet modification so as to adapt to different base material systems; stearic acid is secondarily coated on the surface of the modified conductive powder, so that the dispersity of the silver-containing conductive powder in each system is greatly improved, and the agglomeration of the silver-containing conductive powder is reduced; and moreover, through the treatment method and process, powder agglomeration caused by capillary action is reduced, so that surface treatment of the silver-containing conductive powder from submicron to micron is realized.

The invention relates to the technical field of lithium batteries, and discloses inorganic compound slurry and lithium battery positive electrode slurry containing the same. The inorganic compound slurry comprises inorganic compound solid particles, a dispersing agent A and a dispersing agent B, wherein the dispersing agent A is selected from one or more of amine compounds containing ether chains; the dispersing agent B is selected from one or more of phosphoric acid compounds containing ether chains. The inorganic compound slurry contains the dispersing agent A and the dispersing agent B at the same time, the dispersing agent A and the dispersing agent B are compounded, the synergistic modification effect on the surfaces of inorganic compound solid particles is achieved, and when the inorganic compound slurry is mixed into the lithium battery positive electrode slurry, the agglomeration effect between the solid particles can be reduced; and meanwhile, the problem that the viscosity is sharply increased after the inorganic compound slurry is mixed into the positive electrode slurry is also solved.

The application relates to the technical field of wastewater denitrification, and discloses a composite carrier as well as a preparation method and application thereof. The composite carrier comprises porous molybdenum disulfide, the porous structure of the molybdenum disulfide in-situ grows zirconium metal organic frameworks, and the surface of the molybdenum disulfide is loaded with graphene. The composite carrier can not only serve as a place for denitrification of microorganisms, but also can improve the denitrification efficiency of the microorganisms.

The utility model provides a quartz crucible and a crystal pulling device, the quartz crucible comprises a crucible main body, the crucible main body comprises a bubble layer and a transparent layer, and the bubble layer is arranged on the outer side of the transparent layer; the top of the crucible main body is provided with a camber angle structure, the camber angle structure is composed of the top of the bubble layer and the top of the transparent layer, and the camber angle structure obliquely extends towards the lower portion of the outer side from the edge of an opening of the crucible main body. The top of the quartz crucible is arranged to be of the camber angle structure, in the repeated feeding process, the gathering amount of silicon particles on the top of the quartz crucible can be reduced, the risk that the silicon particles on the top of the quartz crucible fall into the quartz crucible, and consequently melt crystallization or single crystal line breakage is caused is reduced, and the yield of a single crystal silicon rod is increased.

The present application relates to the field of magnesium phosphate cement-based materials, and specifically discloses a preparation method of a waterproof and anti-permeation magnesium phosphate cement-based material and application thereof. The preparation method comprises the following steps: taking 80-100 parts by weight of magnesium phosphate cement, 5-8 parts by weight of a setting and hardening regulator, 10-14 parts by weight of a hydrophobic agent prepared by the present application, 7-10 parts by weight of modified graphene oxide and 30-40 parts by weight of active slag powder. After the above raw materials are uniformly mixed, 25-32 parts by weight of mixing water is added, and a magnesium phosphate cement-based material is obtained. The present application takes magnesium phosphate cement as the main component, and adds the hydrophobic agent, modified graphene oxide and active slag powder, so that the problems of insufficient waterproofness and anti-chloride ion erosion of the magnesium phosphate cement coating are overcome, and the magnesium phosphate cement-based material has good crack resistance and secondary protection capability, and can effectively resist the erosion of water and chloride ions.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of a three-dimensional porous negative electrode material for an ultralow-temperature lithium iron phosphate battery. The method comprises the following steps: adding an ionic liquid modifier A, graphene oxide and an organic solvent into a reactor, and then adding porous silicon PSi to obtain a PSi-coated GO precursor; and heating the PSi-coated GO precursor to 600-900 DEG C under the protection of an argon atmosphere to obtain the three-dimensional porous negative electrode material. By adopting the three-dimensional porous negative electrode material prepared by the invention, the lithium iron phosphate battery can show excellent cycling stability at room temperature and low temperature.

The embodiment of the invention provides a corrosion-resistant electromagnetic shielding material and a preparation method thereof, the corrosion-resistant electromagnetic shielding material is of a layered structure, and the corrosion-resistant electromagnetic shielding material sequentially comprises a conductive layer, an epoxy wave-absorbing layer and a first corrosion-resistant layer. The first corrosion-resistant layer comprises polyphenylene sulfide resin, epoxy fluorosilane modified graphene, polyether-ether-ketone resin and a dispersing agent. According to the corrosion-resistant electromagnetic shielding material provided by the invention, the polyphenylene sulfide resin is adopted as a matrix and has excellent corrosion resistance, the polyether-ether-ketone resin can improve and relieve the brittleness of the polyphenylene sulfide resin, and meanwhile, the epoxy-fluorosilane modified graphene can construct a continuous conductive network to assist in improving the electromagnetic shielding effectiveness; the graphene sheet layer can form a physical barrier network in a polyphenylene sulfide matrix, corrosion medium permeation is blocked, the corrosion resistance is further improved, a covalent bond can be formed between the epoxy group and the epoxy wave-absorbing layer, the interlayer binding force is improved, and the service life of equipment is prolonged.

This invention discloses a method for preparing nano-boehmite and its application in lithium-ion battery separators, belonging to the field of inorganic nanomaterial preparation technology. The method includes five steps: raw material calcination and activation, preparation of precursor slurry, hydrothermal synthesis reaction, washing and filtration, and drying and depolymerization. Calcination is carried out in a dynamic calcination furnace, whose exhaust mechanism can promptly remove water vapor. During discharge, the switching mechanism automatically opens the discharge cover, achieving continuous production with no material sticking to the wall and no residue. The obtained nano-boehmite is characterized by low sodium content, uniform particle size, and good dispersibility. This material can be formulated with binders and other agents to form a ceramic coating slurry. After coating and drying, a robust nano-ceramic coating is formed on the surface of a polyolefin-based membrane. This coating significantly improves the thermal stability, electrolyte wettability, and puncture resistance of the separator, thereby improving the battery's safety performance and cycle life.

The application relates to the technical field of building materials, and discloses a mortar containing nanomaterials and a preparation method thereof, the mortar being composed of 70-80 parts by weight of cement, 8-12 parts by weight of fly ash, 0.4-0.5 parts by weight of a polycarboxylate water reducing agent, 0.4-0.6 parts by weight of hydroxypropyl methylcellulose, 1-2 parts by weight of nanomaterials, 2-3 parts by weight of modified silk fibroin and 40-50 parts by weight of water. The modified nanosilica is modified by gamma-aminopropyl triethoxysilane, the modified cubic nanometer calcium carbonate is modified by fumaric acid, sodium stearate and palmitic acid, and the modified silk fibroin is prepared by being grafted and modified by a double-aminopropyl-terminated polysiloxane. The mortar is treated by optimizing component collocation, modifying the nanomaterials and the silk fibroin, the mechanical properties, the durability and the crack resistance of the mortar are remarkably improved, and the cost is controllable.

This invention discloses a low-serum MDCC-MSB1 (MSB1) suspension culture medium and an inactivated chicken infectious anemia virus (TIV) vaccine. The culture medium comprises amino acids, carbon source, additives, vitamins, inorganic salts, buffer salts, and water, and further contains newborn calf serum (NBCS). Using this medium, low-cost, high-density suspension culture of MSB1 cells can be achieved, significantly improving cell culture stability. After 30 consecutive passages at a 1% volume ratio of NBCS, the viability of MSB1 cells remains above 94%, with uniform cell morphology and a clumping rate of <3%, making it suitable for large-scale bioreactor production. Furthermore, when applied to the preparation of an inactivated chicken infectious anemia virus vaccine, it can comprehensively improve virus propagation efficiency, increasing virus production efficiency by more than 25%, with a virus titer of not less than 1.0 × 10⁻⁶. 8.0 TCID 50 / ml, ensuring stable quality in large-scale production.

This utility model relates to a canine and feline stem cell factor reinfusion device. It includes a drip bottle mounting column with multiple sets of bottle clamping assemblies mounted on it. Each clamping assembly has a limiting barrier structure, and a limiting mounting cylinder is mounted on the limiting barrier structure. A mounting cylinder cover is fastened to the top opening of the limiting mounting cylinder, and a compression spring is mounted on the top inner wall of the mounting cylinder cover. It also includes a shaking and mixing assembly. The shaking and mixing assembly includes a mixing mounting base, a guide mounting base, a laterally movable sliding mounting base, and several elastic mounting mechanisms. A longitudinally movable transfer mounting base is mounted on the sliding mounting base through these elastic mechanisms. It also includes a shaking drive mechanism for driving the transfer mounting base to reciprocate up and down while simultaneously achieving reciprocating lateral movement. This utility model can shake and mix the infusion bottle during intravenous reinfusion, ensuring that the cells are evenly distributed in the saline solution, which is beneficial for maximizing the drug's efficacy.

The invention relates to a liquid embolism agent as well as a preparation method and application thereof. The liquid embolism agent contains 20-40 wt% of tantalum powder and 60-80 wt% of a continuous phase solution; the sum of the contents of the components of the liquid embolism agent is 100%; the continuous phase solution comprises EVOH and DMSO in a volume ratio of (1: 13)-(1: 23); the particle size distribution of the tantalum powder dispersed in the liquid embolism agent ranges from 500 nm to 5000 nm, and the particle size distribution Span value ranges from 1.5 to 2.0. By controlling the particle size of the tantalum powder, the particle size distribution Span value and the proportion of all the components, the tantalum powder forms a stable suspension state in the solution, the toughness of the cured embolism body is improved, and the fracture toughness of the embolism body in the deformation and pressure bearing process is enhanced.

The present application relates to a kind of byproduct comprehensive utilization preparation anhydrous hydrogen fluoride method, the fluorosilicic acid solution with the concentration of 12%-18% in the byproduct of wet-process phosphoric acid production process and the unqualified product in the production process of Mannheim potassium sulfate are reacted, then vacuum filtration is separated to obtain potassium fluosilicate filter cake and dilute sulfuric acid solution containing KCl, K2SO4 Such salt substances.Fluorosilicate potassium filter cake is added in more than 95% hot concentrated sulfuric acid and is decomposed, vacuum distillation and stirring are carried out during reaction process, SiF4, HF gas and potassium sulfate-containing solution are obtained, and the potassium sulfate-containing solution is recycled after cooling and returns to the first step.The raw materials used in the whole process are byproducts, and the cost is low.The byproduct of Mannheim potassium sulfate used not only can improve the fluorine yield of process system, but also can alleviate the situation that silicon dioxide is converted into silicon gel to block the process system.All substances in the process, waste water, waste gas and waste residue are recycled, and the whole process is safe and energy-saving.