41results about How to "High surface energy" patented technology

The present application belongs to the technical field of biochar, and particularly relates to a high-activity acidolysis biochar, which is prepared by the following steps: S1, pretreating agricultural and livestock waste; S2, acidolysing the pretreated biomass with dilute acid to obtain acidolysed biomass; S3, placing the acidolysed biomass into a high-temperature furnace to perform carbonization under an oxygen-free condition, and using a step-by-step heating mode to obtain preliminary biochar; and S4, mixing the preliminary biochar with a copolymer solution to prepare the high-activity acidolysis biochar. In the present application, the sodium lignosulfonate-polyglutamic acid copolymer forms a stable connection with the biochar through chemical bonding, the porous surface of the biochar is uniformly covered with the copolymer to form a nanoscale film, the composite has stronger complexing, chelating and ion exchange capacity for heavy metal ions and other cations in the soil, and is helpful to reduce toxic substances in the soil and improve the soil environment.

This invention discloses a self-cleaning radiative cooling coating based on biomass carbon quantum dots, its preparation method, and its application. The coating comprises a polymer film-forming resin, carbon quantum dots, and hollow glass microspheres; wherein the mass ratio of the polymer film-forming resin to the filler is 1:(0.1-0.5), and the mass ratio of the hollow glass microspheres to the carbon quantum dots is 1:(0.05-0.2). This invention synergistically enhances solar reflectivity through the photoluminescence properties of carbon quantum dots and the scattering properties of hollow glass microspheres, while simultaneously utilizing the synergistic effect of fluorinated resin and modified hollow glass microspheres to endow the coating with superhydrophobic self-cleaning function. A single layer of this coating can achieve a solar reflectivity >92%, mid-infrared emissivity >94%, and contact angle >150°, possessing both efficient daytime radiative cooling and long-lasting self-cleaning performance. It is particularly suitable for passive heat dissipation of outdoor equipment such as new energy vehicle charging piles, and features simple process, environmental friendliness, and excellent performance.

The invention belongs to the technical field of aeronautical materials, and particularly relates to a PEI modified material containing a high-temperature composite dispersion system as well as a preparation method and application of the PEI modified material. The PEI modified material containing the high-temperature composite dispersion system provided by the invention is prepared from the following raw materials: polyetherimide resin, titanium dioxide, carbon black and dispersing agents (a coupling agent and polyamide wax). The PEI modified material containing the high-temperature composite dispersion system provided by the invention can realize efficient and uniform dispersion and color regulation and control of pigments in a high-viscosity and strong-polarity system, and has excellent heat resistance, mechanical property and flame retardant property, and interior structural parts prepared from the PEI modified material meet the comprehensive requirements on light weight, attractiveness and durability in the aviation field.

The invention discloses a preparation method of a polypropylene composite filler based on electrocatalytic oxidation coal gasification fine slag as a raw material, the preparation method comprises the steps of raw material treatment, system modification, material electrolytic oxidation and material post-treatment, the polypropylene composite filler comprises polypropylene resin and the polypropylene composite filler, based on the total weight of the composite material, the usage amount of the composite filler is 5-20wt%, and the usage amount of the composite filler is 5-20wt%. The raw materials comprise an environment-friendly functional auxiliary agent accounting for 0.5-5% of the total weight of the composite material, and the functional auxiliary agent is selected from one of a weather-proof agent, a halogen-free flame retardant and a bio-based antibacterial agent. The method has the advantages that the low-temperature plasma pretreatment and the composite modifier assisted electrocatalytic oxidation process are combined, a large number of active sites can be quickly and efficiently introduced on the surface of the coal gasification fine slag through the low-temperature plasma treatment, and the surface energy and the reaction activity of the coal gasification fine slag are remarkably enhanced.

This invention relates to a coating process for forming a titanium coating on PEEK material, comprising: S1, modifying the PEEK material by electron beam enhanced plasma cleaning, and bombarding the PEEK material surface with argon ions; S2, bombarding the PEEK material surface treated in S1 with metal ions, wherein charged metal ions generated by an ionization source are accelerated and bombarded on the PEEK material surface by a high negative bias voltage; S3, depositing a titanium coating on the PEEK material surface treated in S2, using titanium as the target material. This process can obtain a metal film layer with strong adhesion, dense coating, and biocompatibility on medical PEEK material. The deposited coating can maintain the low elastic modulus matching characteristics of the PEEK material surface and the porous structure of 3D printed PEEK. The deposition temperature is controlled below 100℃, which does not affect the mechanical properties of the material.

The application discloses a plant-based water-based adhesive and a preparation method thereof, and relates to the technical field of water-based adhesives. When the plant-based water-based adhesive is prepared, 2,4-dihydroxybenzophenone and acryloyl chloride are reacted to obtain an acrylate-based benzophenone; the silicon dioxide treated by a silane coupling agent is reacted with the acrylate-based benzophenone to obtain modified silicon dioxide; 4-methylumbelliferone is sequentially reacted with hexamethylene diisocyanate and 2-amino-2-methyl-1,3-propanediol to obtain an umbelliferone diol; castor oil, polybutylene adipate, the umbelliferone diol, dimethylol propionic acid and isophorone diisocyanate are copolymerized, neutralized by triethylamine and emulsified by deionized water to obtain a polyurethane emulsion; and the polyurethane emulsion and the modified silicon dioxide are mixed to obtain the plant-based water-based adhesive. The plant-based water-based adhesive provided by the application has excellent mechanical properties and weather resistance.

The invention relates to the technical field of metal material preparation, in particular to a tantalum-tungsten-based nano composite target material and a preparation method thereof. The method comprises the following steps: smelting a high-purity tantalum block and a high-purity tungsten block, and casting to obtain a tantalum-tungsten prealloy cast ingot; the tantalum-tungsten pre-alloy cast ingot is subjected to atomization powder making, and Ta-W alloy powder is obtained; the Ta-W alloy powder is mixed with a nano carbon material, and TaW-C mixed powder is obtained; and the TaW-C mixed powder is subjected to magnetic field assisted sintering, grain oriented growth is induced, aftertreatment is conducted, and the tantalum-tungsten-based nano composite target material is obtained. The magnetic field assisted sintering adopts a one-way static magnetic field along the direction vertical to the target surface, and the magnetic field intensity is 2-10T. According to the preparation method, the Ta-W-based nano composite target material with high density, uniform tissue and texture orientation can be prepared, and the deposited film has the characteristics of low stress, high flexibility and the like, and meets the use requirements of a flexible implanted electrode.

The application provides a preparation method of nanometer silicon, which comprises the following steps: mixing a reducing metal and silicon halide, heating under a sealed condition to maintain the reducing metal in a molten state, stirring, and obtaining a reaction product; mixing the reaction product with a higher alcohol with hydrophobicity and then standing to obtain a reaction mixture; mixing the reaction mixture with water and stirring, standing to form a water layer and a hydrophobic colloidal layer, obtaining the hydrophobic colloidal layer, and drying to obtain nanometer silicon. The application is based on a molten metal reduction method, uses active reducing metal and silicon halide as raw materials, heats to maintain the reducing metal in a molten state in the reaction process, and reacts with the silicon halide to prepare nanometer silicon. Then, the prepared nanometer silicon is protected and separated by using the method of higher alcohol grafting. The higher alcohol can reduce the activity of the surface of the nanometer silicon, prevent the nanometer silicon from being oxidized in the process of air or water washing, and reduce the generation of silicon oxide impurities.

The application discloses a preparation method of a polyanionic sodium ion battery positive electrode material, and comprises the following steps: S1, preparation of a precursor solution: a transition metal M source, an acid solution and a complexing agent are mixed and dissolved to form a precursor solution; S2, preparation of a pre-oxidized precursor solution: an oxidizing agent is added to the solution to generate a pre-oxidized precursor solution; S3, preparation of M(OH)x precipitation: a pH value of the pre-oxidized precursor solution is adjusted so that transition metal ions in the solution are precipitated in the form of M(OH)x; S4, preparation of a precursor powder: the M(OH)x precipitation, a sodium source, a phosphorus source and a carbon source are mixed wetly to obtain a precursor slurry; S5, drying of the precursor powder: the precursor slurry is dried and separated to obtain a dried precursor powder; and S6, high-temperature sintering: the precursor powder is sintered at a high temperature to obtain a polyanionic material. The polyanionic sodium ion battery positive electrode material has the characteristics of excellent electrochemical performance, high compaction density and low cost.

The invention relates to a plasma treatment method for enhancing carbon fiber composite-aluminum alloy bonding strength. Argon and air are used as plasma media to treat the surface of the material, surface dirt is effectively removed, polar functional groups are introduced, the chemical activity and surface energy of the surface of the material are improved, and the bonding strength of the composite material and the aluminum alloy is enhanced. According to the process, the bonding strength can be remarkably improved by optimizing plasma treatment parameters (such as frequency, speed, distance and the like). Compared with traditional mechanical polishing or chemical etching, the method has the advantages of being simple in process, efficient and environmentally friendly. In addition, an atmospheric pressure plasma technology is adopted, a vacuum environment is not needed, equipment complexity and cost are reduced, and the method is suitable for integration of large-scale industrial production lines. The process is not only suitable for lap joint of the carbon fiber composite material and the aluminum alloy, but also can be widely applied to the field of bonding of other metals and composite materials, and is beneficial for improving the reliability and durability of industrial structural parts.

This invention discloses an active metal brazing paste and its preparation method. The active metal brazing paste is characterized by comprising brazing powder and a binder, wherein the binder component accounts for 8-20% by mass. The brazing powder comprises the following components by mass percentage: 10-30% nano-silver powder; 60-80% silver-copper alloy powder; 5-10% aluminum-silicon alloy powder / titanium-aluminum alloy powder; 2-5% titanium hydride powder. The binder comprises the following components by mass fraction: 75-90% solvent; 5-10% thickener; 2-4% surfactant; 1-2% dispersant; 2-5% thixotropic agent. Compared with the prior art, the active metal brazing paste of this invention has the following beneficial effects: the ceramic copper-clad laminate prepared by the active metal brazing paste has high connection reliability and excellent resistance to thermal cycling.

The application belongs to the technical field of hydrogen energy conversion by electrolysis of water, and particularly relates to a doped nickel oxide modified polysulfone composite diaphragm material and a preparation method thereof, which comprises uniformly dispersing polysulfone in N-methyl pyrrolidone to obtain a polysulfone solution, adding PVP or PEG to the polysulfone solution, stirring until complete dissolution to obtain a mixed solution, adding a doped nickel oxide material to the mixed solution, stirring until complete uniform dispersion to obtain a casting solution, degassing the casting solution by stirring, laying the casting solution on the front end of a doctor blade, sliding the doctor blade at a uniform speed to uniformly spread the casting solution on the surface of a glass film to obtain a liquid membrane, pre-evaporating the liquid membrane in air, immersing the pre-evaporated liquid membrane in deionized water to solidify into a film, peeling off the film and cleaning to obtain the doped nickel oxide modified polysulfone composite diaphragm material. By introducing the doped nickel oxide as a functional modification material, the hydrophilicity and conductivity of the diaphragm are effectively improved.

This invention discloses a high thermal conductivity semiconductor packaging substrate and its preparation method, relating to the field of electronic materials technology. The method includes the following steps: mixing composite aluminum nitride powder with a sintering aid, ball milling, drying, and pressing into shape; sintering under high temperature and high pressure in a nitrogen atmosphere to obtain an aluminum nitride ceramic substrate; washing and drying the aluminum nitride ceramic substrate; covering both sides of the aluminum nitride ceramic substrate with copper foil, laying active solder between the aluminum nitride ceramic substrate and the copper foil, and then connecting them by vacuum brazing to obtain the semiconductor packaging substrate; the composite aluminum nitride powder is composed of aluminum nitride powder and modified aluminum nitride powder in a mass ratio of (6~8):(2~4). The semiconductor packaging substrate prepared by this method has excellent interfacial compatibility, effectively reduces interfacial thermal stress, and has good thermal conductivity.

This invention relates to the field of semiconductor display device manufacturing technology, and discloses a reusable MicroLED chip transfer temporary carrier and its preparation method. The carrier includes a rigid support substrate layer, a peelable intermediate layer, and an elastic functional layer stacked sequentially from bottom to top. The peelable intermediate layer is a double-layer film material, including a bottom acrylic adhesive layer and an upper PVC substrate layer. The elastic functional layer is a polydimethylsiloxane layer cured on the surface of the PVC substrate layer. The preparation method includes plasma cleaning of the substrate, attaching the double-layer film material and rolling and cutting, vacuum degassing and homogenizing the adhesive, and thermal curing. By blocking the penetration of liquid adhesive through the PVC substrate layer, the aged elastic functional layer can be peeled off along with the intermediate layer, avoiding residual adhesive on the substrate. This enables the non-destructive recycling and reuse of the rigid substrate, effectively reducing chip transfer costs.

The invention relates to a current collector module and a preparation method thereof, an electrode plate and a battery. The preparation method comprises the following steps: providing a current collector; performing plasma activating treatment on the surface of the current collector; and depositing a bonding enhancement layer on the surface of the current collector subjected to plasma activation treatment to obtain a current collector module, wherein the thickness of the bonding enhancement layer is less than 1 [mu] m. The current collector module prepared by the preparation method of the current collector module provided by the invention has relatively good bonding performance, and can effectively bond the active material layer, so that the electrode plate has relatively good use performance.

The present application relates to the technical field of functional film, in particular to a low-radiation energy-saving base film for building and a preparation method thereof.The present application overcomes the problem that the mechanical property and optical property of the energy-saving base film in the prior art cannot be considered simultaneously.The present application is prepared from a PET substrate with a skin-core structure, a functional coating and a seven-layer magnetron sputtering film;the skin layer of the PET substrate is PET modified by melt grafting with UVA and HALS additives;the functional coating comprises a water-based PUA emulsion, nano-silicon dioxide and KH550;the seven-layer magnetron sputtering film comprises, from bottom to top, a TiON bottom layer, a Nb2O5 lower layer, an Ag-Pd-Ti lower layer, an AZO layer, an Ag-Pd-Ti upper layer, a Nb2O5 upper layer and a TiON top layer.Through the synergistic effect of grafting modification, functional coating and multi-layer sputtering, the present application maintains the mechanical property while realizing the balance of visible light transmittance and infrared thermal radiation reflectance, and can be applied to the energy-saving field such as building glass.

The application relates to the technical field of dental implants, in particular to a trans-zygomatic implant and a processing technology thereof, and the processing technology comprises variable-distance multi-stage sand blasting and acid etching surface treatment on an anchoring part with threads of the trans-zygomatic implant and electrochemical polishing surface treatment on an extension part without threads. The trans-zygomatic implant is treated by variable-distance multi-stage sand blasting combined with acid etching, so that a uniform micron-level rough base and a multi-stage micropore structure can be formed on the titanium surface, osteoblast adhesion and differentiation are facilitated, the early bone combination speed is accelerated, the combination strength is improved, the early implant loosening risk is reduced, the extension part of the trans-zygomatic implant is treated by electrochemical polishing, a smooth surface can be obtained, plaque adhesion and bacterial colonization are greatly reduced, the implant peri-implantitis risk is reduced, and soft tissue adhesion is promoted; the dual optimization of bone anchoring and tissue adhesion is realized, and the long-term function and health of the trans-zygomatic implant under complex stress are guaranteed.

The invention relates to an anti-skid sports sock. The anti-skid sports sock comprises a sock sole, the sock sole is provided with an anti-skid layer, the anti-skid layer at least covers a front sole area, a toe buckling area and a heel area of the sock sole, and the anti-skid layer covering the heel area of the sock sole is symmetrically arranged along the center line in the length direction of the sock sole; the anti-skid layer comprises a reinforcing layer, a silica gel substrate layer and a silica gel contact texture layer from inside to outside; a plurality of rhombic bulges are arranged on the outer surfaces of the silica gel contact texture layers of the front sole area and the toe buckling area of the sock sole; and a plurality of circular bulges are arranged on the outer surface of the silica gel contact texture layer in the heel area of the sock sole. The antiskid layer is arranged in the specific sole area, the rhombic protrusions are arranged on the antiskid layer in the front sole area and the toe buckling area, and the round protrusions are arranged on the antiskid layer in the heel area, so that the antiskid performance of the sports sock is greatly improved, and the stability of the body of an athlete in the sports process is improved.

This invention relates to the field of lithium-ion battery technology, and proposes a composite inorganic coated aramid separator, its preparation method, and a battery thereof. The composite inorganic coated aramid separator includes an aramid separator and a composite inorganic coating applied to at least one side of the aramid separator. The aramid separator is an activated aramid separator, and the activation treatment is ultraviolet-ozone activation. This technical solution solves the problems of poor interfacial wettability, insufficient thermal stability, and insufficient ion transport uniformity in related technologies.

The present application relates to the technical field of heat management materials, and particularly relates to a POD-based graphite film with interface affinity and a preparation method thereof, the preparation method being as follows: a modified POD polymer solution is prepared by polycondensation and copolymerization reaction of terephthalic acid, isophthalic acid, hydrazine salt and a functional monomer in a fuming sulfuric acid system, the functional monomer containing at least one of a carboxyl group and a hydroxyl group; after the modified POD polymer solution is scraped into a film, the film is formed through a coagulation bath, dried, and then subjected to oxygen plasma treatment to obtain a POD precursor film; after the POD precursor film is subjected to carbonization treatment and graphitization treatment, the POD-based graphite film is obtained, wherein a borate or an aqueous ferric nitrate solution is sprayed on the surface of the carbonized film before graphitization treatment. Through a synergistic modification strategy of molecular design-surface activation-interface optimization, the present application solves the problem of poor interface bonding force of traditional graphite films and is suitable for heat dissipation applications in various fields.

This invention provides a method for preparing porous anode aluminum foil for electrolytic capacitors based on laser additive manufacturing, comprising the following steps: selecting aluminum foil with a thickness of 30 μm and aluminum powder particles with an average particle size of 5-6 μm as raw materials; adding the aluminum powder particles to the aluminum foil through a feeding hopper, and controlling the thickness of the aluminum powder particles using a vibrating scraper below the feeding hopper, so that the aluminum powder is basically spread in a single layer on the aluminum foil to ensure the single-layer distribution of aluminum spheres; adding a dispersant to the raw materials to prevent the spheres from clumping; and adding high-frequency vibration with an amplitude of micrometers to the scraper at the outlet of the feeding hopper to facilitate the single-layer spread of spheres and to cover the entire plane; using a linear laser to weld the aluminum powder particles, completely welding the covered aluminum metal particles. After one side of the aluminum foil is completely welded with the aluminum powder particles, the aluminum foil is flipped over by a flipping device, and then the other side of the aluminum foil is covered and welded with the aluminum powder particles. The preparation method provided by this invention solves the problems of decreased specific surface area and decreased porosity or capacitance of electrode foil in the electrode foil manufacturing process.

This invention proposes a brazing method for aluminum alloys based on surface activation and a pre-placed Ni layer. The method includes: Step 1, pre-treating the aluminum alloy surface to be brazed to ensure it is dust-free and oil-free; Step 2, subjecting the aluminum alloy surface to ion bombardment to remove the oxide film and activate the surface; Step 3, depositing a Ni thin film on the aluminum alloy surface to form a pre-placed Ni layer; Step 4, assembling the aluminum alloys to be brazed and placing them in a vacuum brazing furnace, with the Ni layers of the two aluminum alloys in contact. Pressure is applied to ensure the upper and lower aluminum alloys are tightly bonded and to prevent relative sliding. The furnace is then vacuum-heated to 540℃~585℃ and held for a preset time before cooling to room temperature to obtain an aluminum alloy / Ni / aluminum alloy brazed joint. The joint obtained by this surface-activated, pre-placed Ni layer-based aluminum alloy brazing method has the characteristics of no oxide film at the interface, high tensile strength, and low deformation rate.

The invention discloses a production process of a protective film for electronic equipment. The production process of the protective film for the electronic equipment comprises the following steps: S1, pretreatment and functional coating of a base film; s2, performing multifunctional precision coating; s3, cutting and packaging in an ultra-clean environment; the electronic equipment protective film comprises a release film, an electrostatic adsorption layer, a base film, an automatic repair layer and a surface coating functional layer which are sequentially stacked, the step S2 further comprises the following steps that S21, the coating structure is subjected to one-time extrusion molding from top to bottom; s22, a curing process is conducted, specifically, a UV-LED excimer lamp two-stage curing system is adopted, and after coating is completed, a product passes through a UV-LED curing section firstly; and then deep curing is carried out through a 172nm excimer lamp. According to the production process of the protective film for the electronic equipment, high-purity aromatic TPU with the thickness of 0.2 mm is adopted, and excellent anti-falling and anti-impact basic protection is provided for a screen due to the inherent high toughness, elasticity and impact resistance of the high-purity aromatic TPU.

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 in-situ passivation method for perovskite thin films, a perovskite solar cell, and a method for preparing the same. The in-situ passivation method includes: preparing a perovskite precursor solution comprising formamidinium cations, divalent metal cations, halide anions, and fluorobenzylamine, wherein the content of fluorobenzylamine is 0.01% to 1% of the molar amount of formamidinium cations; coating the perovskite precursor solution and annealing it to crystallize the solution and allow the fluorobenzylamine and formamidinium cations to react in situ, forming an in-situ passivated perovskite thin film. In this application, fluorobenzylamine is used to in-situ passivate the formamidinium-containing perovskite system, achieving mutual promotion between the passivation and crystallization adjustment processes. Furthermore, in-situ passivation suppresses ion migration, allowing the high-quality thin film structure composed of large grains to be maintained during long-term operation, ultimately achieving high device stability.

The invention relates to the technical field of automobile body manufacturing, and particularly discloses an automobile body carbon fiber bonding method. Comprising the following four steps: pretreatment of a bonding base material, preparation and coating of an adhesive, precise bonding and pressurized curing, and detection and finishing after bonding. Wherein the mode of combining high-pressure inert gas purging, ultrasonic cleaning, plasma etching activation and gradient cooling drying is adopted in pretreatment, and the wettability of a bonding surface is improved; the adhesive is a composite modified epoxy adhesive and has high strength and weather resistance; a mode of combining precise positioning with step-by-step pressurization and step heating is adopted in fitting and curing, so that the bonding quality is ensured; and accurate identification and finishing of bonding defects are realized through detection and finishing. The device solves the problems of insufficient bonding strength, low glue layer control precision, low automation degree and the like in the prior art, is high in bonding strength, good in stability and high in production efficiency, meets the large-scale production requirements of automobiles, and can be widely applied to bonding of carbon fiber components of automobile bodies.

The application provides a battery cell, which comprises a positive electrode sheet, a separator and a negative electrode sheet; the positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer; the positive electrode active material layer comprises a positive electrode active material, the positive electrode active material comprises lithium cobaltate, the particle size of the lithium cobaltate is d1, the unit is mu m, and the value range of d1 is 0 mu m < d1 <= 2 mu m; the negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer coated on the surface of the negative electrode current collector; the thickness of the negative electrode current collector is 7 mu m-11 mu m; the negative electrode active material layer comprises a second binder, and the second binder comprises a CMC compound; by introducing lithium cobaltate particles with a particle size of 0-2 mu m into the positive electrode sheet, adopting a negative electrode current collector with a thickness of 7 mu m-11 mu m, and simultaneously adopting a CMC compound in the negative electrode active material layer, the direct current resistance of the battery can be small, the heat generation in the cycle process can be reduced, the by-products caused by temperature rise can be relatively reduced, and the long cycle performance of the battery cell can be ensured.

This invention relates to a method for modifying the surface of biomaterials with an ultrathin hydrophilic lubricating coating and its application. The method comprises: mixing plasma-treated biomaterials with a precursor solution and performing an in-situ polymerization reaction to obtain biomaterials with an ultrathin hydrophilic lubricating coating; the precursor solution includes dopamine or its salt, zwitterionic monomers, and Tris buffer. The ultrathin hydrophilic lubricating coating prepared by the method of this invention can reduce the friction coefficient of biomaterial surfaces and has strong hydrophilic lubrication properties; it can form ultrathin hydrophilic lubricating coatings on the surfaces of different biomaterials, is suitable for surface modification of most biomaterials, has a simple and easy process, good hydrophilic lubrication properties, and can effectively improve the surface lubrication performance of biomedical materials.

The invention discloses a preparation method of a silicon-based antibacterial agent and application of the silicon-based antibacterial agent in preparation of a thin film, and the preparation method comprises the following steps: adding mesoporous silica and 3-aminopropyltriethoxysilane into a container filled with dry toluene, carrying out reflux stirring at 90 DEG C for 24 h, and cooling to room temperature after the reaction is complete, so as to obtain the silicon-based antibacterial agent. Washing with dry toluene, and carrying out vacuum drying to obtain aminated mesoporous silica; the preparation method comprises the following steps: mixing caffeic acid, 1-ethyl-(3-dimethylaminopropyl) carbodiimide, N-hydroxysuccinimide and deionized water, and ultrasonically activating carboxyl at room temperature; after ultrasonic treatment is finished, adding mesoporous silica, stirring at room temperature, centrifugally washing with absolute ethyl alcohol, and drying in vacuum to obtain a light brown powdery product, namely the silicon-based antibacterial agent. The thermal degradation rate of the ASBACA / PVA antibacterial composite film in the degradation stage is lower than that of a pure PVA film, and the thermal degradation temperature of the ASBACA / PVA antibacterial composite film in the degradation stage is higher than that of the pure PVA film, so that the thermal stability of the PVA film is possibly enhanced through the interaction between PVA and the antibacterial agent ASBACA.

The utility model relates to the technical field of protein detection, and discloses a Fe3O4 (at) AuNPs magnetic molecular imprinting sensor detection system which comprises an electrochemical workstation, a magnetic electrochemical molecular imprinting sensor, a carrier, a container, a metal disc and an alternating electric field generation module, the magnetic electrochemical molecular imprinting sensor comprises a working electrode, a counter electrode and a reference electrode, the working electrode, the counter electrode and the reference electrode are all connected with the electrochemical workstation, the working electrode is partially inserted into the container, the metal disc is arranged at the bottom of the container, and the positive electrode of the alternating electric field generating module is connected with the working electrode. The negative electrode of the alternating electric field generation module is connected with the metal disc, the carrier is arranged at the bottom of the working electrode, the carrier is a Fe3O4 (at) AuNPs carrier, and the Fe3O4 (at) AuNPs carrier is obtained by combining a molecularly imprinted polymer of protein with Fe3O4 and then combining with AuNPs. According to the utility model, the detection speed, the detection range and the detection effect of protein are improved.