31results about How to "High electronegativity" patented technology

This invention relates to the field of petrochemical catalytic desulfurization technology, specifically disclosing a high-efficiency desulfurizing agent, its preparation method, and its application in the desulfurization of heavy naphtha. The desulfurizing agent provided by this invention has a "two-level" metal active center. The first level is a cobalt center in biochar, and the second level is a nickel-copper bimetallic center introduced through impregnation on the surface of a composite carrier. The desulfurizing agent provided by this invention has excellent desulfurization effect. Under conditions of 140°C and no hydrogen, it can simultaneously remove inorganic sulfur such as hydrogen sulfide and organic sulfur such as thiols, thioethers, and thiophenes from heavy naphtha obtained by hydrocracking of heavy diesel oil, wax oil, or mixed diesel and wax oil, reducing the total sulfur content from 25-40 μg·g. ‑1 Reduced to 0.2 μg·g ‑1 The following methods can effectively protect bimetallic (multimetallic) reforming catalysts from sulfur poisoning, and the preparation process is green and controllable, making it suitable for large-scale industrial applications.

The invention discloses a green liquid salt and a production process thereof, and relates to the technical field of liquid salts.The production process comprises the steps that a metal organic framework is taken and added into a Tris-HCl buffer solution, uniform mixing is conducted, dopamine hydrochloride is added, stirring, centrifuging, washing and drying are conducted, and the metal organic framework of a core-shell structure is obtained; the preparation method comprises the following steps: adding sulfonated polysulfone, a core-shell structure metal organic framework and polyvinylpyrrolidone into N-methyl pyrrolidone, stirring until the materials are completely dissolved, and carrying out ultrasonic treatment to obtain a membrane casting solution; taking the membrane casting solution, pouring on a glass plate, and performing blade coating, water bath, phase inversion and soaking to obtain a nanofiltration membrane; taking brine, adding modified charcoal, adsorbing, and performing ultrafiltration through an ultrafiltration membrane to obtain ultrafiltration filtrate; and carrying out nanofiltration on the ultrafiltration filtrate through a nanofiltration membrane to obtain liquid salt. Sulfonic acid groups introduced into the nanofiltration membrane are negatively charged, and the interception rate of the nanofiltration membrane on sulfate ions, calcium ions and magnesium ions is improved through electrostatic interaction and size screening.

The application discloses a primary and secondary fusion complete set of pole-mounted circuit breaker and relates to the technical field of circuit breakers, which comprises an arc-extinguishing chamber, the arc-extinguishing chamber comprises an insulating shell, a movable contact, a fixed contact, a dynamic gas generating unit and a passive magnetic sensing unit. The dynamic gas generating unit comprises a gas generating element, a fixed magnetic element and a flow guiding element. The core of the application is that the passive magnetic sensing unit is configured to drive the dynamic gas generating unit and the flow guiding element to move when the movable contact is opened, and the fluorocarbon gas generated by the decomposition of the gas generating element under the electric arc is guided to the electric arc area in the center of the arc-extinguishing chamber, so that the uniform distribution is formed to realize efficient arc extinguishing. Through the synergistic effect of magnetic control driving, passive gas generation and active flow guiding, the arc extinguishing speed and reliability are significantly improved, and the technical problems that the arc extinguishing effect of the existing pole-mounted circuit breaker is poor and the high integration and high reliability requirements of the primary and secondary fusion equipment cannot be met are effectively solved.

The invention belongs to the technical field of silicon carbide flat membranes, and particularly provides a high-electronegativity silicon carbide flat membrane material and a preparation method thereof. The invention relates to a preparation method of a high-electronegativity silicon carbide flat sheet membrane material, which comprises the following steps: mixing phytic acid and an organic solvent to prepare a precursor solution, impregnating a silicon carbide flat sheet membrane substrate with the precursor solution, carrying out a reaction, and carrying out stage heat treatment. The high-electronegativity silicon carbide flat sheet membrane material prepared by the method has high electronegativity in a wide pH range, the water permeation flux is high, and after multiple humic acid pollution-cleaning cycles, the flux attenuation is less, and the anti-pollution performance is good. When silica sol is added into the precursor solution, the electronegativity of the silicon carbide flat sheet membrane material can be further improved, so that the anti-pollution performance of the high-electronegativity silicon carbide flat sheet membrane material is further improved.

This invention belongs to the field of water softening and sterilization technology, and discloses an ion-selective adsorption electrode, a micro-electric field adsorption system, and their application in water softening and sterilization / algae removal. An ion-selective adsorption electrode comprises polypolycarboxylate ion exchange fibers, activated carbon, a conductive agent, and a binder, wherein the mass percentage of the polypolycarboxylate ion exchange fibers is 5-20%. This invention uses CCEF-modified activated carbon as the cathode, and at the optimal doping level, it effectively removes Ca... 2+ and Mg 2+ The selectivity coefficients were 15.0 and 13.5, respectively, for Ca 2+ The electroadsorption capacity of the electrode is 311 μmol / g, which is much higher than that of the AC electrode. After 50 cycles of stability testing, the Ca... 2+ The electroadsorption capacity remained above 85%, demonstrating good regeneration ability. Activated carbon modified with nano-silver was used as the anode, and under electric field enhancement, the inhibition rates against bacteria and microalgae reached over 99% and 90%, respectively, exhibiting excellent antimicrobial contamination capabilities.

This invention relates to the field of thermal printing materials technology, specifically to a thermal film based on modified cellulose and its preparation method. To improve the waterproof and moisture-proof performance of the thermal film, this invention uses tetrafluorophthalic acid, containing a large amount of fluorine, as a raw material to undergo an esterification reaction with 1,3-di(4-hydroxybutyl)-1,1,3,3-tetramethyldisiloxane, thereby generating a hydroxyl-terminated fluorine intermediate containing fluorine and silicon elements. This improves the hydrophobic properties of the protective layer against water vapor and reduces the surface energy of the protective layer, reducing friction with other objects and reducing adhesion between thermal films. Based on this, this invention mixes the hydroxyl-terminated fluorine intermediate with polyether polyol and carboxymethyl cellulose, thereby grafting the polyether polyol and the hydroxyl-terminated fluorine intermediate into the cellulose carbon chain and crosslinking it with isocyanate to form a network crosslinked structure, achieving protection of the thermal imaging layer in the thermal film.

The application provides a modified conductive carbon, a slurry, a positive electrode, a battery and a preparation method thereof, the modified conductive carbon, wherein 0.05wt%-0.1wt% of F elements are doped. Compared with unmodified conductive carbon, the modified conductive carbon has an open pore structure. The modified conductive carbon is prepared by fluorination treatment of graphene oxide with sodium 2,2,3,3-tetrafluoropropionate as a fluorine source and phosphoric acid immersion treatment. The application improves the problem of water introduction in the positive electrode slurry, can stabilize the viscosity of the positive electrode slurry in air, and improves the electrical properties such as the resistance, charge and discharge life of the battery, and improves the chemical stability of the positive electrode slurry of the sodium ion battery in air.

This invention belongs to the field of flow battery energy storage technology, and relates to a negative electrode electrolyte for alkaline all-iron flow batteries and its preparation method. The negative electrode electrolyte is prepared from iron salts, a complexing agent, a promoting component, an alkaline component, an auxiliary electrolyte, and water. The total iron concentration is 0.1–2.0 mol / L, the molar ratio of the complexing agent to the iron salt is 1.5–4, the molar ratio of the promoting component to Fe is 0.05–1.0, the alkaline component concentration is 2.0–6.0 mol / L, and the auxiliary electrolyte concentration is 0–2.0 mol / L. The negative electrode electrolyte of this invention for alkaline all-iron flow batteries has a high total iron concentration, which not only avoids the precipitation of elemental iron during charging and discharging, but also effectively prevents the formation of ferric hydroxide precipitate, improves the stability of iron ions, and greatly extends the cycle life of the negative electrode electrolyte. It can be widely used in aqueous alkaline all-iron flow batteries.

This invention provides an absorbent for capturing carbon dioxide and a method for capturing carbon dioxide. By volume percentage, the absorbent comprises 20-60% glycine salt aqueous solution, 10-50% triethylene glycol monomethyl ether, 5-10% ethylene glycol, and the balance being water. This absorbent combines the advantages of glycine salt systems, such as low volatility, non-toxicity, safety, and better antioxidant degradation resistance, while avoiding the risk of solid precipitates forming after absorption by the glycine salt system, which could cause pipeline blockage.

The application provides a positive electrode active material, a preparation method thereof, a positive electrode sheet and a secondary battery. The positive electrode active material comprises a compound with a chemical formula of formula 1: [Na x □ y ]Ni a Fe b Mn c A m Q n O β formula 1, wherein 0.6<=x<1.0, 0.06<=y<=0.4, 0<=a<=0.5, 0<=b<=0.5, 0.35<=c<=0.7, 0<=m<=0.1, 0<=n<=0.1, 1.96<=beta<=2.02, and a<c; □ is a Na vacancy, the Na vacancy comprises an intrinsic Na vacancy and a Na vacancy introduced by the A; the A comprises at least one of metal ions with full or empty d orbitals, and the Q comprises at least one of metal cations with +1 valence or +2 valence. In the application, the A enters the TM layer to replace part of the Mn 4+ , so that the TM n+ is in an electron-deficient state, and spontaneous oxidation reaction is inhibited.

This invention provides a mechanically durable, antibacterial, and environmentally friendly marine antifouling coating, its preparation method, and its application. Belonging to the field of marine antifouling materials technology, it comprises the following components: a fluorinated quaternary ammonium salt polysiloxane prepolymer; nano-titanium dioxide; a curing agent; and pigments. The fluorinated quaternary ammonium salt polysiloxane prepolymer is prepared by dehydration condensation reaction of quaternary ammonium salt silane monomer A, phenyl silane monomer B, and fluorinated silane monomer C in an organic solvent under the action of an alkaline catalyst. The quaternary ammonium salt compounds used in this invention possess excellent environmental compatibility and outstanding rapid antibacterial and algaecidal effects, endowing the material surface with continuous microbial inhibition and killing properties. By disrupting the integrity of bacterial cell membranes and interfering with the activity of biological enzymes, it blocks the colonization and reproduction chain of marine attached organisms from the source, significantly improving the coating's resistance to typical fouling organisms such as barnacles and diatoms. Simultaneously, it can significantly improve the coating's modulus and hardness, making it more resistant to scratches, abrasions, and impacts.

The invention relates to the technical field of high polymer materials, in particular to a perfluoropolyether derivative with high thermal stability, a preparation method of the perfluoropolyether derivative, a nano coating composition and application of the nano coating composition, and the perfluoropolyether derivative is composed of a K-type perfluoropolyether main chain and an amido-containing alkane chain segment connected to the tail end of the K-type perfluoropolyether main chain through an amido bond. The shielding effect of fluorine atoms on highly polarized fluorocarbon bonds on a perfluoropolyether main chain on a carbon-carbon main chain is utilized, so that the skeleton main chain is not easy to damage, and therefore, the perfluoropolyether derivative has excellent chemical stability and high temperature resistance; an alkane chain segment with a specific structure is introduced to the tail end of a perfluoropolyether main chain, so that the thermal stability of the derivative is remarkably improved; meanwhile, as fluorine atoms have relatively strong electronegativity, the interaction force among perfluoropolyether molecules is relatively small, so that the perfluoropolyether has extremely low surface tension and good hydrophobic and oleophobic properties, and has high optical transparency and good adhesive force and durability when a nano coating is formed.

This invention relates to an organic electron transport material containing naphthalene and benzyl nitrile groups and its applications. By introducing benzyl and triazine groups at the 1,4 positions of naphthalene, this invention improves the material's thermal stability and film-forming properties, and increases its electron mobility. The organic electroluminescent compound provided by this invention exhibits high thermal stability and film-forming properties, as well as strong electron mobility. Organic electroluminescent devices fabricated using this compound demonstrate excellent luminous efficiency and longer device lifetime.

This invention discloses a flexible triboelectric nanogenerator (TENG) based on a superhydrophobic thin film, comprising a positive friction layer and a negative friction layer. The positive and negative friction layers are made of flexible thin films as the electrode base materials, and both electrodes are based on flexible materials. A gap exists between the positive and negative friction layers, and the edges of the two friction layers are electrically connected. At the connection points, the two friction layers can contact each other to generate positive and negative static charges, and electrons flow between the two electrode layers to form alternating current. By using flexible thin films as the electrode base materials for the positive and negative friction layers, this invention achieves a high dielectric constant while maintaining the flexibility and stretchability of the polymer matrix, effectively improving the output power of the TENG and resulting in better electrical performance.

The invention discloses a preparation method of an environment-friendly salt-resistant and high-temperature-resistant filtrate reducer for a long open hole section. The preparation method specifically comprises the following steps: step 1, preparing a first mixed solution; step 2, preparing dispersion liquid; step 3, mixing the first mixed solution and the dispersion solution, and then shearing for 1-2 hours to obtain a shearing solution; step 4, adding the shear fluid into a reaction kettle, introducing nitrogen into the reaction kettle, discharging air in the reaction kettle, keeping the temperature at 70 DEG C, stirring for 10 minutes while keeping the temperature, adding an initiator, and stirring for 10-12 hours to obtain a reaction liquid; step 5, adding the reaction liquid into isopropanol according to a volume ratio of 1: 1.5, stirring for 40 minutes, standing for 2 hours, and filtering to obtain a reaction material; and step 6, washing the reaction material with absolute ethyl alcohol and methanol for 10 minutes respectively, and then drying to obtain the environment-friendly salt-resistant and high-temperature-resistant filtrate reducer for the long open hole section. The problem that an existing filtrate loss agent is poor in filtrate loss reduction performance in a long open hole section is solved.

The application relates to the technical field of new materials, and discloses a hydrophobic fabric and a preparation method thereof.The method comprises the following steps: (1) performing ultrasonic treatment and / or low-concentration alkali liquid immersion treatment on a fabric, and obtaining a pretreated fabric after washing; (2) dissolving heptadecafluorodecyltrimethoxysilane in a solvent to obtain a heptadecafluorodecyltrimethoxysilane solution with a concentration of 0.1-10 wt%; and (3) soaking the pretreated fabric in the heptadecafluorodecyltrimethoxysilane solution, and obtaining a hydrophobic fabric after airing and drying.The method provided by the application can realize excellent hydrophobic effect by changing the chemical properties on the premise that the surface morphology of the fabric fiber does not change significantly, and finally a fiber fabric with excellent hydrophobic performance is prepared.

This invention relates to lithium battery electrolytes, and discloses a cross-linked interpenetrating composite electrolyte for secondary lithium batteries and its preparation method. The composite electrolyte includes a polymer electrolyte and an anhydrous electrolyte. A membrane, which is a flexible inorganic SiO2 nanofiber membrane, is disposed within the secondary lithium battery. The composite electrolyte is located between the electrodes and the membrane of the lithium battery. The polymer electrolyte is polymerized from tetraethylene glycol diacrylate monomer and 2,2,3,3-tetrafluoropropyl methacrylate monomer. The polymer electrolyte is in a three-dimensional network structure, and the anhydrous electrolyte fills within the network of polymer electrolyte, forming a gel-like composite electrolyte. The anhydrous electrolyte is composed of an organic solvent and a lithium salt. By in-situ polymerization of tetraethylene glycol diacrylate monomer and 2,2,3,3-tetrafluoropropyl methacrylate monomer between the membrane and the electrodes of the secondary lithium battery, a network-like polymer electrolyte encapsulating the anhydrous electrolyte is formed, exhibiting excellent cycle performance and rate performance.

The present application relates to a kind of bimetallic synergistic molecular sieve catalyst, preparation method and its application, the molecular sieve catalyst includes molecular sieve carrier and active component;Molecular sieve carrier includes SSZ-13 molecular sieve;Active component includes Cu and Ru;Cu is in the form of single atom distribution in the CHA cage of molecular sieve carrier;Ru is in the form of RuO2 nanoparticle distribution on the surface of molecular sieve carrier.The bimetallic synergistic molecular sieve catalyst provided by the present application, Cu and Ru and the bimetallic synergistic effect between them can significantly improve the catalytic performance of the molecular sieve catalyst, so that NH3 selective catalytic oxidation reaction has higher NH3 conversion rate in the temperature range of 150~200 ℃, and in the temperature range of 200~300 ℃, NH3 conversion rate is close to 100%, while in the wide temperature range of 150~300 ℃, always maintain high N2 selectivity.

The invention relates to the technical field of preparation of foam glass, in particular to high-strength and low-heat-conductivity foam glass and a preparation method thereof. The problems that existing foam glass is low in strength and high in heat conductivity are solved. According to the foam glass, waste glass and glass fibers are used as raw materials, silicon carbide is used as a foaming agent, borax is used as a fluxing agent, trisodium phosphate dodecahydrate is used as a foam stabilizer, modified polyurethane and silicon dioxide aerogel are used for modifying the foam glass, the porous structure advantage of the aerogel enables heat to be transmitted along a slender framework of the aerogel, the heat transfer flux is low, and the foam glass has good heat transfer performance. The heat loss in the transmission path is large, and due to the existence of the aerogel particles, the solid-phase transmission path of heat in the foam glass is more complex, the CF3 group low surface energy reduces the heat convection path and inhibits the solid-phase heat conduction, so that the foam glass has a lower heat conductivity coefficient, and the mechanical strength of the material is improved. Therefore, the durability and thermal insulation performance of the foam glass are enhanced.

The invention provides modified conductive carbon, slurry, a positive electrode, a battery and a preparation method of the modified conductive carbon, and the modified conductive carbon is doped with 0.05 wt%-0.1 wt% of an F element. Compared with unmodified conductive carbon, the modified conductive carbon has an open pore structure. The modified conductive carbon is prepared by using 2, 2, 3, 3-tetrafluoropropionate sodium as a fluorine source to carry out fluorination treatment on graphene oxide and carrying out phosphoric acid soaking treatment. The problem of water introduction in the positive electrode slurry is improved, the viscosity of the positive electrode slurry in air can be stabilized, the electrical properties such as resistance and charge-discharge life of the battery are improved, and the chemical stability of the positive electrode slurry of the sodium-ion battery in air is improved.

This invention discloses a method for synthesizing an adsorbent for the rapid removal of methylene blue from water using waste plastics as raw materials, belonging to the field of pollutant treatment technology. The method for synthesizing the methylene blue adsorbent using PET as raw material includes the following steps: mixing PET material, sodium chloride, and zinc chloride, carbonizing to obtain a PET-based carbon material, mixing with a polyoxometalate solution, and reacting to obtain the methylene blue adsorbent. The adsorbent synthesized by this invention has advantages such as high removal rate and short adsorption equilibrium time. It facilitates the resource utilization of PET material while overcoming the shortcomings of existing adsorbents, such as low removal rate and long adsorption equilibrium time. This invention converts PET material into an adsorbent through carbonization, not only promoting the upgrading and recycling of PET materials but also providing another possibility for methylene blue adsorption.

The application relates to the technical field of building materials, and particularly discloses a kind of nanometer materials for wall cable trench cavity water stop and a preparation method thereof, which comprises the following raw materials in parts by weight: sebacic acid 5-10 parts, acrylic acid 50-70 parts, olivine powder 10-20 parts, magnesium aluminum silicate 10-20 parts, calcium acrylate 20-30 parts, aluminate coupling agent 1-2 parts, curing agent 1-2 parts, coagulant 1-2 parts, water reducing agent 1-2 parts, modified additive 1-2 parts, deionized water 30-40 parts, ammonium persulfate 0.5-1 part. The modified additive has phosphorus, silicon, fluorine elements and long-chain alkyl on the molecular structure, and the modified additive and other raw materials significantly improve the flame retardance, compressive strength, chemical stability and waterproof performance of the nanometer material for wall cable trench cavity water stop through synergistic effect. Meanwhile, the modified additive also reduces the agglomeration phenomenon among raw materials, ensuring that the nanometer material has good strength and water plugging effect.

This invention discloses a lithium-rich manganese-based layered oxide composite cathode material and its preparation method, belonging to the field of lithium-ion battery technology. The method includes: adding water to a nickel source, a cobalt source, and a manganese source to obtain a mixed solution; adding sodium carbonate solution to adjust the pH; washing with deionized water and centrifuging; drying; mixing with lithium salt; and pre-calcining to obtain Li. 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 1.8 F 0.2 The material was then subjected to a process involving the sequential addition of a carbon source and an organic solvent. The resulting mixture was heated under a mixed atmosphere to obtain a lithium-rich manganese-based basal oxide material. Na₂WO₄ and pyrrole were then added, and the mixture was dissolved in deionized water to obtain a composite cathode material, Li. 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 1.8 F 0.2 @N,S-C@Na2WO4@PPy. The composite cathode material of this invention has uniform particles, stable structure, and exhibits considerable wide potential window reversible capacity, excellent rate performance, and stable cycle life.

This invention relates to the field of polymer materials technology, and more particularly to a polyamide-imide polymer, its preparation method, and its applications. This invention uses a polyamide-imide polymer having the structure shown in Formula I to prepare a polyamide-imide film. The polyamide-imide polymer uses 2,2'-di(trifluoromethyl)diaminobiphenyl as a diamine monomer and 5,5'-(1,4-phenylene)bis[hexahydro-4,7-methanolisobenzofuran-1,3-dione] as an anhydride monomer, which is copolymerized with terephthaloyl chloride in different proportions and 2,2'-di(trifluoromethyl)diaminobiphenyl to obtain the polyamide-imide polymer, and then to prepare the polyamide-imide film. The PAI film prepared by this invention has high visible light transmittance, low coefficient of thermal expansion and mechanical properties, and good solubility in most organic solvents, making it easy to process and showing broad application prospects in the optoelectronic field.

The application relates to the technical field of heavy metal ion detection, in particular to a nitrogen-doped graphene modified paper-based electrode and a preparation method and application thereof. The preparation method provided by the application comprises the following steps: providing filter paper, the filter paper has a hydrophobic region and a non-hydrophobic region, and the surface of the hydrophobic region is provided with a hydrophobic barrier; printing a three-electrode system and a conductive pad on the surface of the filter paper to obtain a paper-based electrode, the three-electrode system comprises a working electrode, a counter electrode and a reference electrode; mixing an ammonium chloride and ammonia water mixed solution and an oxidized graphene solution to obtain an electrolyte; and dropping the electrolyte on the paper-based electrode to perform electrochemical deposition, thereby obtaining a nitrogen-doped graphene modified paper-based electrode. The preparation method is simple in operation and mild in conditions, and the nitrogen-doped graphene electrode prepared by the method has strong anti-interference performance, low detection limit and high sensitivity when simultaneously detecting Cd 2+ , Pb 2+ and Hg 2+ three ions in a water environment.

The application provides a phosphate-modified polyester resin and a preparation method and application thereof, and a coating, and belongs to the technical field of industrial coatings.The phosphate-modified polyester resin has a main chain and a side chain containing phosphate groups.The P atom of the phosphate group has a large electronegativity, so that the phosphate-modified polyester resin has a large polarity and the phosphate group contains a hydrocarbon group, which makes the phosphate-modified polyester resin have good wettability;the phosphate group has strong acidity, can be chemically bonded with metal ions on the surface of a coated substrate, generates an organic metal phosphate, and forms an organic metal phosphate film, so as to form a "chemical bridge" between the surface of the substrate and the coating, which greatly improves the adhesion between the coated substrate and the coating, so that the surface of the coated substrate can be directly coated without chemical pretreatment when the powder coating is sprayed, thereby improving the spraying efficiency, saving the cost, and reducing the environmental pollution.

The optical path control member according to the embodiment includes a first substrate, a first electrode provided on the first substrate, a second substrate provided on the first substrate, a second electrode provided below the second substrate, and an optical conversion unit provided between the first electrode and the second electrode, in which: the optical conversion unit includes a partition wall portion, a housing portion, and a base portion; an optical conversion material including a dispersion liquid, an optical conversion particle, and a dispersant is provided in the housing portion; and the dispersant includes a non-ionic dispersant.

The application discloses a GaN-based light-emitting diode epitaxial wafer and a preparation method thereof and a GaN-based light-emitting diode, and relates to the field of semiconductor photoelectric devices. The GaN-based light-emitting diode epitaxial wafer comprises a substrate and a nucleation layer, an intrinsic GaN layer, an N-type semiconductor layer, a multi-quantum well layer, an electron blocking layer and a P-type semiconductor layer arranged on the substrate in sequence; and the P-type semiconductor layer is a C / O co-doped P-type GaN thin film layer. By implementing the application, the brightness of the light-emitting diode can be improved, the anti-static capacity can be improved, and the surface roughness can be reduced.

This invention relates to the field of two-dimensional material preparation technology, specifically to a two-dimensional material-liquid field effect method for transferring two-dimensional materials, comprising: Step 1, placing a target substrate on a two-dimensional material, wherein the two-dimensional material is grown on a growth substrate, and drying the target substrate; Step 2, cutting the target substrate to expose the interface between the target substrate and the two-dimensional material; Step 3, continuously dripping liquid into the interface between the target substrate and the two-dimensional material. This invention does not introduce chemical contamination during the transfer process; it can significantly improve the ability of two-dimensional materials to transfer to a target substrate; it can self-drive the improvement of two-dimensional material transfer capability without the need for external electric field assistance; it does not involve high-temperature annealing or other methods, has low requirements for environmental humidity and cleanliness, and is widely applicable to various two-dimensional materials; it is simple to operate and low in cost. Considering the above advantages, this invention has good application prospects in the field of two-dimensional material application technology.

The invention relates to the technical field of biomedical materials, discloses a preparation method of a bone repair mineralized biological membrane capable of inducing gene expression and a product, and aims at solving the problems that an existing bone repair material HAP crystal is difficult to regulate and control, the mechanical activity and the biological activity are not matched, bone induction is weak, the process is complex and the like. The preparation method comprises the following steps: S1, preparing a decellularized small intestinal submucosa (SIS) membrane and sterilizing; s2, constructing a pDA-PAM (at) SIS composite membrane; s3, inducing directional growth of HAP through ion permeation biomimetic mineralization; and S4, cleaning and drying to obtain the HAP / SIS collagen mineralized biological membrane. The product contains an SIS collagen matrix and low-crystallinity nano HAP (the width is 4-20nm, the length is 31-105nm, and the product is oriented along a c axis), the tensile strength is greater than or equal to 13MPa, the elastic modulus is greater than or equal to 75MPa, the specific surface area is greater than or equal to 60m < 2 > / g, and osteogenic genes such as ALP, Runx2 and the like can be up-regulated by more than or equal to 2 times. The method is mild in process, easy to operate, good in biocompatibility, high in bone conduction and inductivity, suitable for large-scale production and capable of meeting the clinical bone defect repair requirement.