53results about How to "Easy reunion" patented technology

The invention belongs to the technical field of high-voltage electric appliance material preparation, and particularly relates to a zinc oxide resistor disc and a preparation method and application thereof. The preparation method comprises the following steps: (1) pre-sintering zinc oxide powder; (2) mixing the zinc oxide powder obtained in the step (1), an auxiliary agent and a dispersion liquid, and carrying out ball milling to obtain slurry; the particle size D50 of the slurry is 0.8-1.2 [mu] m, and the dispersity is greater than or equal to 95%; (3) performing spray drying and granulation on the slurry to obtain granulation powder; (4) carrying out molding and first sintering on the granulated powder to obtain a resistor disc semi-finished product; the first sintering adopts sectional sintering; and (5) forming an electrode layer on at least one surface of the resistor disc semi-finished product by adopting a vacuum sputtering and / or electrophoretic deposition process, and performing secondary sintering and annealing. The contact resistance of the zinc oxide resistor disc is less than or equal to 5m omega; and after 1000 hours of aging in a 85 DEG C + 85% RH environment, the leakage current increase is less than or equal to 2 [mu] A, and the performance degradation rate is less than or equal to 5%.

The present application relates to a kind of in situ low-temperature confined carbonization construction carbon dot enrichment coating layer manganese-based positive electrode material and its preparation method, by accurately coordinating the evolution condition of carbon point carbon source in the mixing system environment of coating process, freezing condition and sublimation and carbonization, realize the whole process synergistic control of carbon point carbon source spatial distribution, ice crystal template state, skeleton construction of controlled conversion of carbon point carbon source and harmful residue removal on the surface of manganese-based positive electrode material, successfully constructed the carbon dot enrichment coating layer of size controllable, density adjustable, ion permeability good and interface combination firm on the surface of manganese-based positive electrode material, to realize the synergistic promotion of manganese-based positive electrode material cycle performance, rate performance and interface stability.

The invention discloses a high-dispersity antimony oxide flame-retardant master batch based on nano modification and a preparation method thereof, and belongs to the technical field of flame-retardant modification of high polymer materials. The flame-retardant master batch consists of the following components in percentage by weight: 30-50% of nano antimony oxide, 3-8% of a dispersion modifier, 40-65% of carrier resin and 1-5% of a dispersing aid. The preparation method comprises the steps of nano antimony oxide pretreatment, mixing, melt extrusion, granulation and the like. Nano antimony oxide is subjected to surface modification through the dispersion modifier, and the synergistic effect of the auxiliary dispersant and the carrier resin is combined, so that the surface energy of the nano antimony oxide is effectively reduced, the problem that the nano antimony oxide is easy to agglomerate in a polymer matrix is solved, and high dispersity is realized; meanwhile, the flame-retardant synergistic efficiency is remarkably improved, the stability of the flame-retardant property of the material is ensured, and the mechanical property and the processing fluidity of a high polymer material are not damaged.

This invention discloses an antifouling membrane made of lanthanum-loaded carbon nanomaterials suitable for phosphorus recovery in wastewater, its preparation method, and its applications. The invention involves loading lanthanum carbonate octahydrate onto the surface of multi-walled carbon nanotubes (MWCNTs) to form lanthanum-loaded carbon nanomaterials (La@MWCNTs), which are then deposited onto the surface of a polyethersulfone-based membrane using vacuum filtration to form a self-supporting membrane. The prepared lanthanum-loaded carbon nanomaterial antifouling membrane possesses both phosphorus removal and recovery capabilities, exhibiting high efficiency in phosphorus removal from water. This facilitates phosphorus elution and recovery, effectively solving the problems of lanthanum-loaded carbon nanomaterial aggregation and recovery, and effectively avoiding the risk of lanthanum-based adsorbent leakage during phosphorus removal. Furthermore, the lanthanum-loaded carbon nanomaterial antifouling membrane operates within a low-pressure range, exhibiting low energy consumption and effectively mitigating membrane fouling caused by humic acid. It shows promising application prospects in wastewater phosphorus recovery and eutrophication control.

The application discloses a kind of solid electrolyte material and its preparation method, positive pole piece, solid electrolyte film and full solid battery, it is related to solid battery field;Method comprises: lithium lanthanum zirconium oxygen base solid electrolyte is dispersed in first solvent, and electrolyte dispersion liquid is made;Acidic pH regulator is added to the electrolyte dispersion liquid, and the pH of the electrolyte dispersion liquid is adjusted to 7~8, and neutral dispersion liquid is obtained;Orthosilicate is added to the neutral dispersion liquid and mixed to obtain dispersion solution;During mixing process, polysiloxane is formed by the reaction of orthosilicate, and polysiloxane is coated on the surface of lithium lanthanum zirconium oxygen base solid electrolyte;The dispersion solution is subjected to electrolyte separation and drying treatment to obtain a solid electrolyte material.The application aims to improve the surface properties of lithium lanthanum zirconium oxygen base solid electrolyte, so that it can build good interface contact with other inorganic materials.

The invention belongs to the technical field of electro-catalysis, and particularly discloses a Cu nanoparticle / acidified carbon nanotube catalyst and a preparation method and application thereof.According to the preparation method, acidified pretreated carbon nanotubes with good conductivity and high specific surface area are selected as a substrate, CuO nanoparticles are evenly loaded through a hydrothermal method, and the Cu nanoparticle / acidified carbon nanotube catalyst is obtained; and growing a zeolite imidazate framework material-8 (ZIF-8) on the surface of the CuO nanoparticle-loaded carbon nanotube in situ, and regulating the thickness of an ultrathin nitrogen-carbon layer on the surface and coordination of Cu-N by regulating the calcining temperature and time. According to the Cu nanoparticle / acidified carbon nanotube catalyst as well as the preparation method and the application thereof, the Cu nanoparticles are encapsulated in a confined manner, so that long-service-life electrically-driven CO2 is converted into a high-added-value C2 + product, catalytic active sites of the Cu nanoparticles are fully exposed, the charge transfer rate is increased, and the intrinsic activity of the Cu active sites is improved.

This invention discloses a gas diffusion layer with multi-level mass transfer channels, its preparation method, and its application. The gas diffusion layer with multi-level mass transfer channels includes a substrate layer and a microporous layer on the substrate layer; wherein the microporous layer comprises carbon black, hollow porous carbon nanofibers, and optionally a hydrophobic binder. This invention uses hollow porous carbon nanofibers as a novel MPL carbon material to synergistically construct a gas diffusion layer with better water vapor management capabilities in conjunction with carbon black particles. The resulting gas diffusion layer exhibits excellent comprehensive performance; its hollow porous structure provides additional water transport channels, improving water vapor transport capacity, thereby enabling the assembled membrane electrode to have better output performance.

The invention provides a polyvinyl acetate aqueous dispersion with a self-stabilizing structure and a preparation method of the polyvinyl acetate aqueous dispersion. The polyvinyl acetate aqueous dispersion is prepared from a vinyl acetate monomer and at least one hydrophilic anchoring monomer through a free radical polymerization reaction, wherein the hydrophilic anchoring monomer is embedded into a polyvinyl acetate molecular chain in a polymerization process, so that an obtained polymer molecule forms a self-stabilization dispersion structure with a hydrophilic interface layer in a water phase. A hydrophilic anchoring structure unit is introduced into a polyvinyl acetate molecular chain to form a core-shell type particle structure with a core formed by a hydrophobic polyvinyl acetate chain segment and an outer layer interface formed by a hydrophilic anchoring monomer, so that polymer molecules can spontaneously form a stable dispersion structure in a water phase; the problem that polyvinyl acetate is easy to agglomerate in a water phase is solved from the molecular structure level, so that the polyvinyl acetate aqueous dispersion with uniform particle size and good storage stability is obtained under the condition that no or only a small amount of surfactant is needed.

The present application belongs to the technical field of preparation of multi-curved surface silicon carbide, and discloses a preparation method of reaction sintering multi-curved surface silicon carbide whole plate, comprising: mixing 100 parts of alpha-SiC powder, 15-20 parts of composite carbon source, 1-2 parts of silicon carbide fiber, 2.3-3.8 parts of dispersing agent, 8-12 parts of water-soluble phenolic resin, 2-4 parts of additive and 42-46 parts of water according to weight parts, pre-dispersing, ball-milling, spray granulating, pressing into multi-curved surface green body; the green body is stacked with graphite support parts and filled with graded silicon particles, and is subjected to step-by-step degreasing and step-by-step reaction sintering under vacuum argon, and then is cooled after temperature control to obtain the product. Through the synergistic effect of formula control of composite carbon source, specific ternary additive and fine sintering process, the technical problem of sintering cracking and cracking of multi-curved surface whole plate is eliminated, and the product density, bending strength and fracture toughness are effectively improved.

This invention discloses a DBD powder processing device and method based on three-dimensional turbulent mixing technology, belonging to the field of powder uniform processing technology. The device includes a gas supply unit, a DBD reactor, and a monitoring unit. The gas supply unit is connected to the DBD reactor and is used to provide working gas and reaction medium to the DBD reactor. The DBD reactor includes a device platform, a plasma cylinder, and a second electric motor. A stirring paddle and a first electric motor are installed inside the plasma cylinder. The first electric motor drives the stirring paddle to rotate and stir the powder to be processed inside the plasma cylinder. The plasma cylinder is fixed on the inclined surface of the device platform. The second electric motor is located at the bottom of the device platform and is fixedly connected to the plasma cylinder, driving the plasma cylinder to rotate. The monitoring unit is connected to the DBD reactor and is used to discharge and monitor the powder to be processed inside the plasma cylinder. This invention achieves uniform powder dispersion while using low-temperature plasma modification technology, suppressing powder adhesion and agglomeration.

The application discloses a kind of biocompatible materials and preparation method for bionic porous intervertebral fusion cage, belong to intervertebral fusion cage material technical field.A kind of biocompatible materials for bionic porous intervertebral fusion cage, by weight parts includes the following components: polyether ether ketone 65-80 parts, modified functional filler 15-25 parts, hydroxyapatite 8-12 parts, flow modifier 0.5-1 part;The modified functional filler is graphene oxide coated modified barium titanate functional filler.By introducing surface conductive modified nano piezoelectric ceramic particles, realize the effective conversion and transmission of mechanical stimulation to bioelectric signal, this microstructure design makes the insulating polyether ether ketone matrix possess the electric activity of simulating natural bone stress-electric signal response mechanism, so as to be favorable to activate osteoblast activity and promote bone integration of implant interface.

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 application discloses a Ru / CeO2-SiO2 catalyst for hydrogen production by ammonia decomposition and a preparation method thereof, and belongs to the technical field of catalyst preparation. The catalyst comprises an active component Ru and a carrier CeO2 / SiO2. The CeO2 nanoparticles are uniformly dispersed on the surface of SiO2 by using an electrostatic adsorption method, and the active component Ru nanoparticles are selectively loaded on the surface of CeO2. The CeO2 has a unique Ce 3+ -Ce 4+ The variable valence capacity can form rich oxygen vacancies. The generation of the oxygen vacancies is favorable to enhancing the interaction intensity between Ru and CeO2, improving the electronic structure of the Ru surface, activating reactants, optimizing reaction kinetics, and promoting the ammonia decomposition reaction. In addition, the Ru particles are only distributed on the surface of CeO2, and even if the CeO2 moves on the surface of SiO2 at high temperature, the active component Ru will not be agglomerated, so that the Ru / CeO2-SiO2 catalyst exhibits excellent ammonia decomposition reaction catalytic performance and good stability.

This invention belongs to the fields of powder metallurgy and materials science and technology, specifically disclosing a preparation process for a high-wear-resistant WC-based composite material. The process involves preparing WC powder, second-phase powder, and graphene material; adding the graphene material to a dispersion medium and performing ultrasonic dispersion; mixing the graphene dispersion with the WC powder and second-phase powder and ball milling; drying the mixture using a vacuum rotary evaporation drying process; and densifying it using a hot-pressing sintering process. This invention enables the WC-based composite material to simultaneously achieve high hardness and high fracture toughness; effectively inhibits oxidative wear of the WC-based composite material at high temperatures, improving its high-temperature wear resistance; and achieves uniform and stable dispersion of the graphene reinforcing phase in the WC matrix, avoiding agglomeration, thereby fully utilizing its strengthening and lubrication effects. The composite material prepared by this invention is particularly suitable for use as high-speed cutting tools, high-temperature molds, and high-temperature moving parts in aerospace applications, and has broad application prospects.

The utility model discloses a kind of flotation reagent quantitative proportioning device, it is related to flotation reagent proportioning technical field.The utility model includes preparation tank and the chassis of being arranged in the bottom of preparation tank outside and the top frame of being arranged in the top end of preparation tank, further include: liquid material feeding hopper, wear in the inside top end of the top frame one side, the bottom end of the liquid material feeding hopper inside is provided with solenoid valve.The utility model is provided with the stirring paddle with through-hole, which is beneficial to shear and crush the agglomeration of mixed raw materials during the stirring and proportioning of flotation reagent, improve the agglomeration of mixed raw materials, and change the flow direction and speed of the material in the stirrer, enhance the turbulence, thereby improve the mixing effect and rate, and then speed up the mixing and proportioning efficiency of flotation reagent, and when the shaft drives the stirring paddle to stir mixed raw materials, the fixed frame can drive the scraper and polyethylene scraping strip to scrape the powder liquid material attached to the inner wall of preparation tank to ensure the mixing quality.

The invention relates to the technical field of aluminum oxide preparation, in particular to calcined alpha aluminum oxide with high sintering activity and a preparation method thereof. The preparation method comprises the following steps: mixing an aluminum hydroxide raw material with boric acid to obtain a primary mixed raw material; mixing alumina seeds with the primary mixed raw material to obtain a secondary mixed raw material; wherein the adding mass m1 of the aluminum oxide seeds and the adding mass m2 of the boric acid meet the condition that m1: m2 is greater than or equal to 8: 1; and calcining the secondary mixed raw material to obtain calcined alpha alumina. According to the preparation method, the sintering activity of the calcined alpha alumina is synergistically improved through three key links of boric acid fluxing, alumina seed phase change promotion and mass ratio regulation and control of boric acid and alumina seeds. And finally, the calcined alpha-alumina with the original grain size of 2.75 mu m or less, the specific surface area of 0.85 m < 2 > / g or more and the sodium oxide content of 0.271% or less can be obtained, which shows that the calcined alpha-alumina has high sintering activity.

The application relates to the technical field of lubricating oil, and particularly discloses a high-temperature-resistant and high-friction-reducing lubricating oil and a preparation method thereof. The lubricating oil comprises the following components: 35-45 parts of poly-alpha-olefin, 10-15 parts of methyl ricinoleate, 20-30 parts of pentaerythritol tetraoleate, 15-20 parts of hydrogenated base oil, 0.1-0.2 parts of modified graphene oxide, 0.8-1.5 parts of extreme-pressure anti-wear agent, 0.5-1 part of detergent, 0.3-0.5 part of antioxidant, 0.2-0.3 part of dispersant, 0.5-0.8 part of viscosity index improver, 0.1-0.2 part of rust inhibitor and 0.01-0.05 part of antifoaming agent. The application realizes cost reduction and emission reduction by compounding multiple base oils, guaranteeing the stability of the system through multi-component synergy and replacing part of the base oil with plant-based base oil. The modified graphene oxide significantly reduces wear through physical friction reduction and chemical anti-wear synergy, quickly discharges accumulated heat and prolongs the service life at high temperature.

The invention relates to the technical field of polypropylene non-woven fabrics, and provides a polypropylene material for non-woven fabrics and a preparation method thereof, the polypropylene material comprises the following raw materials by weight: 80-100 parts of polypropylene, 5-15 parts of a propenyl elastomer, 0.5-1 part of an antioxidant, 0.5-1 part of a lubricant, and 10-15 parts of a filler; the filler is prepared from the following raw materials in parts by weight: 100 parts of calcium carbonate and 20 to 30 parts of 2-phenoxyethyl acrylate. According to the technical scheme, the problem that the mechanical property of the polypropylene material for the non-woven fabric is insufficient in the prior art is solved.

The application provides a thick film positive photoresist composition, a preparation method and application thereof. The thick film positive photoresist composition comprises 70-90 parts of a base resin, 10-30 parts of a photosensitive compound and 100-150 parts of a solvent A; the base resin comprises a benzophenone modified phenolic resin and optionally an unmodified phenolic resin; the mass percentage of benzophenone groups in the base resin is 0.8-7.5% based on 100% of the mass percentage of the base resin; the photosensitive compound comprises a non-benzophenone photosensitive compound and optionally a benzophenone compound; the mass percentage of the benzophenone compound is less than or equal to 3.0% based on 100% of the mass percentage of the photosensitive compound. The application improves the uniformity of the benzophenone structure in the thick film positive photoresist composition by designing the specific composition of the thick film positive photoresist composition, thereby improving the steepness of the photoresist and realizing the development of the pattern.

This invention provides a method for dyeing with vat dyes in an overflow dyeing machine. The use of a dye premix significantly improves dyeing performance. The cationic properties of modified cationic starch electrostatically adsorb onto fabric fibers, allowing the coated dye particles to quickly and evenly adhere to the fabric surface. This avoids localized color differences caused by uneven dye dispersion in the dye bath, and the water flow impact in overflow dyeing prevents localized dye aggregation, effectively improving dyeing uniformity and ensuring consistent dyeing results for the same batch of fabrics. The stable structure formed by the cross-linking of modified cationic starch and vat dye forms a protective film on the fabric fiber surface after color fixation, enhancing the binding stability between the dye and fiber, reducing damage to dye molecules from external factors such as light, improving the dye's lightfastness and the fabric's sunlight fastness. Its film-forming properties also make the dye and fiber bond more firmly, preventing fading.

This invention discloses a low-temperature solid-phase synthesis method for manganese tetroxide, belonging to the field of inorganic functional material preparation technology. The preparation method includes: preparing a targeted organic ammonium salt surface modifier; preparing a composite precursor by high-energy ball milling of a manganese source (γ-type MnOOH) and a rhombohedral MnCO3, a modifier, and a composite auxiliaries; obtaining a crude product through a low-temperature solid-phase reaction at 220-350℃ under a nitrogen or argon inert atmosphere; and obtaining the final product through fluidized bed desorption, air jet milling depolymerization, sieving, acid washing, and vacuum drying. To address the shortcomings of existing solid-phase synthesis methods, such as high energy consumption, easy generation of impurities, and product agglomeration, this invention proposes a synergistic regulation and low-temperature solid-phase synthesis technology. Through specific manganese source formulation and the synergistic effect of modifiers and auxiliaries, pure-phase synthesis at 220-350℃ is achieved, solving problems such as high-temperature dependence and impurity phase formation. The product has a regular crystal structure, high purity, and good dispersibility, making it suitable for high-end lithium-ion battery cathode materials and other applications. The process is energy-efficient and environmentally friendly.

The application discloses a cell for displaying diatom peptide R5 on the surface, and a preparation method and application thereof. The cell for displaying diatom peptide R5 on the surface is mixed with silica-containing sandstone material, so that the preparation and regeneration of a biological building material are realized. The cell for displaying R5 peptide on the surface is in-situ mineralized and self-assembled into an anaerobic core-shell structure, an anaerobic microenvironment is created, and the fermentation yield under anaerobic conditions is improved.

This invention relates to a ceramic surface fiber composite layer, its preparation method, and its application. The high-toughness fiber composite layer is attached to the surface of a ceramic blank. The fiber composite layer is composed of multiple interwoven mullite fibers and a silica sol solidified phase. The mullite fibers have an alumina content of 70wt%~80wt% and are short-cut fibers with a length of 3~10mm. The preparation process of the fiber composite layer is as follows: silica sol is sprayed onto the surface of the ceramic blank; mullite fibers are dispersed on the surface of the ceramic blank; the silica sol is dried to fix the mullite fibers to the surface of the blank; this step is repeated several times, and after completion, silica sol is sprayed again, and the fiber composite layer is prepared when the blank mass remains unchanged. Compared with existing technologies, the ceramic with a fiber composite layer prepared by this invention can be used as tableware and art pieces, possessing advantages such as high toughness, food safety, compatibility with the ceramic blank, and suitability for the low-temperature sintering process requirements of daily-use ceramics.

This invention provides an MXene-AP-HOPO self-supporting composite membrane for uranium-containing wastewater treatment, its preparation method, and its application. Specifically, it relates to an MXene-AP-HOPO self-supporting composite membrane for uranium-containing wastewater treatment. The composite membrane is a three-dimensional porous self-supporting membrane structure formed by amino-functionalized MXene nanosheets as a substrate and hydroxypyridinone functional monomers covalently coupled to the substrate via amide bonds. The composite membrane of this invention, by leveraging the high specific coordination ability of HOPO for uranyl ions and the excellent structural properties of MXene, solves the defects of HOPO due to its high water solubility, such as easy dissolution and loss in aqueous solutions, and the poor reusability of existing HOPO-based adsorbent materials. It also overcomes the problems of traditional powder adsorbents, such as difficult solid-liquid separation, easy agglomeration, high recycling costs, and difficulty in adapting to continuous industrial processes, thus achieving efficient treatment of uranium-containing wastewater and convenient recycling and reuse of materials.

The application relates to the field of electrochemistry, and provides a positive electrode additive composition, a positive electrode slurry and a positive electrode sheet, which comprise an additive powder, a dispersion aid and a solvent; the additive powder is a metal element doped metal organic framework material; the metal element comprises at least one of Li, Na, K, Ca, Mg, Cu, Co, Ni, Fe, Cr, Ti, Zn and Mn, and the molar content of the metal element is 0-2.3 based on the amount of substance of the metal element doped metal organic framework material. The additive is first fully wetted and dispersed to form a positive electrode additive composition in the form of a mixed glue liquid, and then added into the slurry, so that the problem of easy agglomeration of the additive powder can be effectively solved, and the stability of the positive electrode slurry is improved. The positive electrode additive composition is in the form of a mixed glue liquid, so that the additive is easier to mix with other materials, the preparation process of the positive electrode slurry can be simplified, and the production efficiency is improved.

This invention relates to a short-process technology for enhanced separation of ilmenite, belonging to the field of mineral processing technology. The process includes three steps: (1) performing a roughing and scavenging flotation operation on the ilmenite feed material to obtain ilmenite flotation concentrate and flotation tailings; (2) performing acid pretreatment on the ilmenite flotation concentrate, followed by solid-liquid separation to obtain acid-pretreated ilmenite concentrate; and (3) performing a high-gradient strong magnetic separation roughing operation on the acid-pretreated ilmenite concentrate to obtain the final ilmenite concentrate. The process structure of this invention is simple and efficient. In the ilmenite beneficiation process, the addition of acid pretreatment can reduce heterogeneous agglomeration between ilmenite and gangue mineral particles, and the use of high-gradient strong magnetic separation can enhance the efficient collection of ilmenite, obtaining high-grade and high-recovery titanium concentrate, which fully solves the technical problem of the difficulty in recovering fine-grained ilmenite.

This invention discloses a method for preparing biomedical layered heterogeneous graphene-magnesium-based composite materials. The method involves depositing graphene oxide onto magnesium-based alloy sheets using electrophoretic deposition. By varying the deposition time and the initial graphene thickness, layered graphene-magnesium-based composite materials with different structural parameters are constructed. The composite materials are then subjected to spark plasma sintering and multiple rolling steps to obtain the biomedical layered heterogeneous graphene-magnesium-based composite material. This method can reduce the degradation rate of bio-magnesium alloys in vivo, increase the service life of biomedical magnesium alloys in the human body environment, and simultaneously improve the strength and toughness of the material itself.

This invention relates to the technical field of battery separator performance improvement methods, and proposes a method for improving the performance of lithium-ion battery separators. The method involves preparing a PVDF electrospun layer on the surface of a polyolefin separator, and adding sepiolite to the electrospun layer. Sepiolite can improve the uniformity and stability of PVDF distribution in the separator, enhance the wettability of the separator, and adsorb hydrofluoric acid in the electrolyte, inhibiting internal side reactions in the lithium-ion battery and improving the battery's cycle performance. The method includes the following steps: First, using electrospinning technology, a PVDF electrospun layer is prepared on the surface of the polyolefin separator, and sepiolite is added to the electrospun layer. The sepiolite needs to be modified beforehand. A certain amount of modified sepiolite is added to a certain amount of PVDF solution to prepare an electrospinning solution. After the electrospinning solution is prepared, the polyolefin separator is wound onto an electrospinning collector.

This invention discloses a nano-modified composite grouting material suitable for deep, high-temperature geothermal environments and its preparation method, belonging to the field of geotechnical engineering technology. The raw materials for preparing this composite material include: cement, fly ash, cellulose nanofibers, Pluronic F-127 dispersant, calcium formate, tannic acid, borax, defoamer, and water; wherein the mass ratio of tannic acid, calcium formate, and borax is (0.15-0.25):(1.1-1.4):(0.1-0.2). This invention, through the compounding of specific admixtures, effectively overcomes the defects of traditional grouting materials, such as rapid setting at high temperatures and poor rheological properties. The resulting composite material exhibits low viscosity, long pumpability, and high early strength in high-temperature environments, significantly improving the reinforcement effect on deep, high-temperature rock masses and providing a high-performance, high-reliability grouting solution for deep underground engineering.

A preparation method of a polyurethane-liquid metal composite elastic heat material with high thermal conductivity. The steps include: S1, selecting a liquid metal material A with a suitable melting point and a shape memory polymer material B and a dissolved solution C of the material B; S2, adding the polyurethane material B to the dissolved solution C and stirring until completely dissolved to prepare a solution of the material B; S3, adding a certain mass of the material A to the solution of the material B for stirring and ultrasonic oscillation, so that the material A is uniformly dispersed in the solution to obtain a mixed solution of the material A and the material B; S4, uniformly pouring the mixed solution obtained in the step S3 into a mold; S5, placing the mold containing the mixed solution into a drying box for drying and forming at high temperature, and finally obtaining a high-thermal-conductivity liquid metal-polyurethane composite elastic heat material D composed of the material A and the material B. The material has good thermal conductivity, large elastic heat effect and extremely low driving stress, and the preparation method is simple.