26results about How to "High application potential" patented technology

The application relates to a ferroelectric monolayer vanadium trichloride film and a preparation method thereof. The method comprises the following steps: evaporating and depositing VCl3 powder on the surface of a NbSe2 substrate under an ultrahigh vacuum atmosphere, and performing annealing treatment, so that the ferroelectric monolayer vanadium trichloride film is obtained. The sample preparation strategy of molecular beam epitaxy under an ultrahigh vacuum environment is used, high-purity VCl3 powder is evaporated and deposited on a NbSe2 substrate, an atomically flat monolayer VCl3 sample is obtained through annealing treatment, in-situ scanning tunneling microscope technology and scanning tunneling spectrum technology are combined, and it is determined that the monolayer VCl3 is a semiconductor material with ferroelectricity. The method provides a new method and idea for introducing ferroelectricity in the family of transition metal trichlorides, has high application potential and scientific research value, meanwhile, the successful introduction of ferroelectricity in the system also provides a new platform for carrying out multi-state regulation and research.

This invention discloses a high-activity, heat-resistant α-glucan phosphorylase mutant and its applications, belonging to the fields of genetic engineering and modern enzyme technology engineering. This invention utilizes site-directed mutagenesis technology to modify the wild-type... α‑ Dextran phosphorylase was modified to construct a series of mutants. Compared with the wild-type enzyme, the enzyme activity was increased by 1.68 to 2.49 times, and the mutants had a wider range of adaptability to temperature and pH. Among them, the mutant R282Y / H506A showed excellent thermostability. After incubation at 60℃ for 132 h, its enzyme activity was still 50.96%, and after incubation at 70℃ for 60 h, its enzyme activity was still 53.71%. The significantly improved thermostability creates better conditions for the use of this enzyme in practical applications.

The invention discloses cation modified nano graphene oxide and a preparation method thereof, the transverse size of the cation modified nano graphene oxide is 10-100 nm, the surface of the cation modified nano graphene oxide is non-covalently bound with organic quaternary ammonium salt cations through electrostatic interaction, and the organic quaternary ammonium salt cations are provided by a cationic surfactant. According to the invention, electrostatic interaction is combined with a quaternary ammonium salt cationic surfactant, and a hydrophobic long alkyl chain of the quaternary ammonium salt cationic surfactant is exposed outwards, so that the product can be stably dispersed in various organic solvents such as methanol, ethanol, acetone, ethyl acetate, N-methyl pyrrolidone (NMP), N, N-dimethylformamide (DMF), dichloromethane and the like; the limitation that traditional nano graphene oxide is only limited to a water phase is avoided, and the compatibility and application potential in the fields of polymer composite materials, oil paint, high-performance resin and the like are improved.

The present application relates to a kind of stability and good photocatalytic performance of lead-free double perovskite microcrystal and its preparation method and application, belong to the preparation technical field of perovskite microcrystal.The lead-free double perovskite microcrystal of the present application is mainly Cs4MnSb2Cl 12 Microcrystal or Cs4Mn 0.7 Cu 0.3 Sb2Cl 12 Any one in microcrystal.The lead-free double perovskite microcrystal of the present application has good photocatalytic performance, with excellent stability, high purity and other advantages, shows great application potential in photocatalysis field.In addition, the preparation method of the present application is simple, easy to operate, low in equipment requirements, low in cost, low in energy consumption, suitable for large-scale production.

The invention provides oil-based drilling cutting-based fluid-state solidified soil as well as a preparation method and application thereof, and belongs to the technical field of fluid-state solidified soil. The oil-based drilling cutting based flow state solidified soil is prepared from the following raw materials: 100 parts of pretreated oil-based drilling cutting, 10 to 15 parts of a composite curing agent, 1 to 3 parts of polymer latex, 2 to 4 parts of rubber particles, 0.2 to 0.4 part of basalt fiber, 0.5 to 1 part of magnesium oxide, 0.2 to 0.5 part of a flocculating agent, 0.4 to 0.6 part of a water reducing agent and 60 to 80 parts of water, the pretreatment method of the oil-based drilling cuttings comprises the following steps that the oil-based drilling cuttings are subjected to heat treatment after being subjected to preliminary dehydration; then, uniformly mixing the oil-based drilling cuttings subjected to heat treatment with quick lime and an ionic salt solution, and carrying out braising treatment; and then adding activated carbon and wood chips, and stirring at normal temperature for reaction to obtain the pretreated oil-based drilling cuttings. The oil-based drilling-cutting-based fluid-state solidified soil has good fluidity and excellent compressive strength and crack resistance, the problems that oil-based drilling cuttings occupy land and pollute the environment after being piled up for a long time are solved, and resource utilization of waste materials is achieved.

The invention provides a beta-1, 3-glucan hydrolase mutant and application thereof, and relates to the technical field of biology. The mutant provided by the invention is obtained by carrying out site-directed mutagenesis by taking beta-1, 3-glucan hydrolase GH3 as a wild type enzyme. Compared with a wild enzyme, the enzyme activity of the D446W mutant is improved by 54%, so that the application potential and commercial value of the D446W mutant in the fields of medicines, health care products, functional foods and the like are favorably improved.

The application provides a simulation method and device for harmonic detection of cable joint interface pressure and a medium. The method comprises the following steps: modeling a simulation geometric model of a cable intermediate joint, and setting an ultrasonic excitation source; modeling through a nonlinear spring damper to obtain a cable joint pressure model; simulating nonlinear ultrasonic detection of the cable joint interface pressure, and obtaining a frequency spectrum diagram at each point probe. Through modeling of the nonlinear spring damper on the cable joint model, the nonlinear interaction at the interface of the cable intermediate joint is simulated, the change of the harmonic characteristics when the interface pressure changes is deeply explored by using the nonlinear harmonic detection principle, the relationship between the two is established, the state of the cable intermediate joint under various interface pressures is accurately simulated, the pressure at the interface of the cable intermediate joint is fully considered, and simulation analysis is performed on the cable joint interface pressure detection by establishing a new interface nonlinear model.

The invention discloses a DSG2-targeted nuclide diagnosis and treatment integrated probe as well as a preparation method and application thereof, and the DSG2-targeted nuclide diagnosis and treatment integrated probe takes two serially connected cyclic peptides as a core targeting structure, and a DSG2-targeted radiolabeled complex can be obtained by labeling nuclide through a bifunctional chelating agent. Experimental results show that the complex is expected to be applied to DSG2 targeted nuclide diagnosis and treatment as a probe.

The invention discloses a method for preparing MXene through fluoride-free alkali etching of an ultrasonic-assisted supercritical fluid technology, and relates to the field of MXene preparation.Fluorine-free green preparation of MXene is achieved through cooperation of supercritical carbon dioxide fluid and a high-frequency power ultrasonic technology and a fluoride-free etching agent. The preparation method comprises the following steps: introducing carbon dioxide to reach a supercritical state, carrying out an etching reaction in the supercritical state by adopting a stirring or fluid circulation mode, applying continuous or discontinuous high-frequency power ultrasonic treatment to the whole reaction system, recovering to normal pressure and normal temperature after the reaction is finished, collecting a product, washing and drying, thereby obtaining the high-purity silicon dioxide. The high-frequency vibration of the ultrasonic waves and the high diffusivity of the supercritical carbon dioxide are utilized to promote the etching agent to remove A-layer elements in the MAX phase, so that the use of a fluorine-containing etching agent is avoided, the environmental pollution is reduced, and the etching efficiency of the MAX phase is also remarkably improved.

The invention discloses a nano-island confinement iron mononuclear site catalyst and a synthesis method and application thereof, and relates to the technical field of water pollution control and resource recovery, the catalyst takes spheroidal C-Fe0 as a nano-island confinement carrier, urea is introduced as a nitrogen source through a calcination process, and is coordinated with Fe atoms in C-Fe0 to form a FeN4 mononuclear site, and the nano-island confinement iron mononuclear site catalyst is prepared. And a space synergistic effect is formed with the nano island confinement carrier. The preparation method specifically comprises the following steps: dissolving anhydrous sodium acetate in a green tea extracting solution, adding an iron nitrate nonahydrate solution, magnetically stirring, and centrifuging, washing and freeze-drying after the reaction is completed to obtain an iron precursor; the preparation method comprises the following steps: mixing an iron precursor with urea, and roasting in an inert gas environment to obtain the nano island confinement iron mononuclear site catalyst marked as C-Fe0-coated FeN4. According to the catalyst, the co-activation capability of PAA and 2, 6-DCP on a C-Fe0-coated FeN4 interface can be enhanced, 2, 6-DCP is induced to be subjected to an efficient oxidative polymerization reaction, and synchronous emission reduction and carbon resource recovery of 2, 6-DCP are achieved.

The application relates to a three-dimensional force sensor and belongs to the technical field of sensors. The three-dimensional force sensor comprises, in sequence, an electrode layer, a pressure-sensitive layer and a mechanical transmission layer. The mechanical transmission layer comprises mechanically-transmitting structures which are arranged at intervals. The mechanically-transmitting structures comprise integrally-formed lower parts and upper parts. The lower parts are curved bases, and the upper parts are flagelliform protrusions. The electrode layer is provided with a collecting unit corresponding to the mechanically-transmitting structures. The three-dimensional force sensor can increase the top contact sensitivity, realize high-precision three-dimensional force detection of shear forces such as torsion, and is easy to manufacture and low in cost.

This invention provides a coreless stator with a high magnetic flux density and a thin working area, and an axial flux motor. The coreless stator includes a first winding unit and a second winding unit stacked axially. Several winding coils of the first and second winding units are fabricated on a conductive substrate using a subtractive process. Each winding coil includes a working area, a hollow slot, and bent outer and inner coil bridging areas. The first and second winding units are circumferentially misaligned during axial stacking, so that the working areas of the first and second winding units are circumferentially spaced and distributed in the same radial plane, forming the stator working section. The thickness of the stator working section does not exceed half the total thickness of the coreless stator. This application further thins the stator working section of the coreless stator, significantly reducing the effective working air gap length of the axial flux motor, significantly enhancing the air gap magnetic flux density, improving the motor's torque density and power density, and achieving synergistic optimization of performance and reliability.

The invention provides a multimode flexible sensor with pressure-proximity-magnetic field sensing and a preparation method thereof, and belongs to the technical field of flexible sensors. According to the application, the mold containing the inclined columnar hole array is prepared, the magnetic suspension is poured into the mold, then the first fabric is placed at the top of the mold, the magnetic inclined micro-column array can be integrated on the front surface of the first fabric after the magnetic suspension is cured, and after the first conductive layer is loaded on the back surface of the first fabric, the magnetic inclined micro-column array is integrated on the back surface of the first fabric. The integrated fabric electrode can be prepared; the integrated fabric electrode and the second fabric electrode are assembled in a butt joint mode, the magnetic inclined micro-column array serves as a dielectric layer, and the high-performance multi-mode flexible sensor which is high in sensitivity and fast in response is formed. The multi-mode flexible sensor can realize continuous and uninterrupted interaction, output signals of proximity sensing, pressure sensing and magnetic field sensing are not overlapped and are easy to distinguish, and the multi-mode flexible sensor has a good application prospect in the fields of medical health detection, human-computer interaction, electronic skin and the like.

The invention discloses a single-layer super-structure lens covering zero to infinite total object distance. The single-layer super-structure lens comprises a transparent medium substrate; the nano-structure array is arranged on the substrate and consists of a plurality of nano-structure units; each nano structure unit comprises an external cuboid high-refractive-index medium main body and a cuboid cavity completely embedded in the high-refractive-index medium main body; the center of the cavity coincides with the center of the high-refractive-index medium body, and the long axis direction of the cavity has a design orientation angle relative to the x axis in the plane where the high-refractive-index medium body is located. By setting the design orientation angle distribution of the cavity, the metamaterial lens can generate a geometric phase modulated by the design orientation angle for incident circularly polarized light in the cross circular polarization channel, and generate a propagation phase determined by an electromagnetic resonance mode of the high-refractive-index medium main body in the same circular polarization channel. According to the invention, the super-structure lens can cover full-object-distance continuous real image imaging from zero to infinity without mechanical movement or complex stacking.

This invention discloses an implantable closed-loop neuromodulation system and method, relating to the field of neuroengineering, aiming to solve the problems of poor electrode adaptability and slow closed-loop response in existing implantable neuromodulation systems. The system includes intracranial electrodes, a one-to-one matching adapter plate for adapting different electrodes, a feedthrough component, and an implantable host fixed to the skull surface. The processing unit within the host decodes neural signals in real time within 10 ms to determine the brain state; if an abnormality is detected, the stimulation output unit selects a pattern from a preset safe stimulation pattern library to generate stimulation commands for intervention. This application achieves multi-electrode adaptation through the adapter plate and millisecond-level closed-loop response through high-speed processing, improving the timeliness and accuracy of intervention and enhancing safety.

The application relates to the technical field of biomaterials, in particular to a silk fibroin-based biomaterial containing growth factors for injection and a preparation method. The silk fibroin and sodium hyaluronate are cross-linked, the gel is freeze-dried to ensure the stability of the product, the SF-HA freeze-dried powder is compounded with cross-linked sodium hyaluronate as a dispersion medium to form a composite gel particle system, the composite gel is sterilized, and then is blended with growth factors to obtain the silk fibroin-based biomaterial, in which the silk fibroin particles are wrapped by the hyaluronic acid cross-linked lattices. The silk fibroin-based biomaterial is prepared, the degradation period of the product is prolonged, and meanwhile, the uniformity, biocompatibility and active ingredient reservation of the material are considered.

The invention relates to the field of conducting films, in particular to an inorganic-organic composite protective layer for a silver nanowire conducting film and application of the inorganic-organic composite protective layer, and the protective layer is prepared according to the following method: adding an inorganic phase raw material into a mixed solvent, and stirring to form a suspension; adding a modifier into the suspension, adjusting the pH value, heating and stirring for reaction; after the reaction is finished, centrifugally separating and collecting a product, washing and drying to obtain an organic modified inorganic phase; under the protection of nitrogen, adding the flexible resin and the cross-linking agent into a reaction container, heating and stirring; adding an initiator, continuously stirring to obtain a flexible organic phase prepolymer, and sealing and storing in a dark place; and adding the modified inorganic phase into the organic phase prepolymer, stirring, then carrying out ultrasonic dispersion, and finally stirring at a high speed to obtain the uniform and stable composite slurry. The key problem that flexibility and barrier property of an existing inorganic-organic composite protective layer in a flexible application scene are difficult to consider at the same time is solved.

This invention discloses a PtCo intermetallic compound based on microwave-assisted gas-phase dispersion. Using platinum, cobalt, and carbon sources, the PtCo intermetallic compound is uniformly dispersed on carbon materials via microwave-assisted gas-phase dispersion and deposition, followed by high-temperature treatment. The PtCo intermetallic compound consists of nanoparticles with an average particle size of 2.96 ± 0.34 mm and an L10 ordered core structure. The preparation method includes the following steps: 1. microwave treatment of the precursor; 2. high-temperature treatment of the precursor. When the PtCo intermetallic compound is used in the oxygen reduction reaction at the cathode of a proton exchange membrane fuel cell, the peak power density is 0.950–1.000 W / cm². ‑2 .

The present invention relates to absorbent resins and methods for making the same, and more particularly, to absorbent resins having a magnetic susceptibility B of 8 or less, a Centrifuge Retention Capacity (CRC) of 30 g / g or greater as measured according to EDANA method WSP 241.2, an Absorption Under Pressure (AUP) of 9 g / g or greater at 4826 Pa (0.7 psi) as measured according to EDANA method WSP 242.2, and a Permeability of 1,000 seconds or less, and methods for making the same.

The application relates to the technical field of cell culture, and discloses a tracheal fibroblast cell and application thereof, the cell being a guinea pig tracheal fibroblast immortal cell, and the preservation number being CGMCC No. 46764. In the application, the cell has good susceptibility to respiratory tract pathogens and excellent transfection efficiency. The cell can be used for isolating or culturing respiratory tract pathogens, preparing respiratory tract pathogen vaccines, screening and / or preparing medicines for preventing and / or treating diseases caused by respiratory tract pathogens, serving as a host cell for researching respiratory tract pathogens, detecting respiratory tract pathogens for non-diagnostic purposes, and constructing an in-vitro model of respiratory tract pathogen infection, and has high scientific research value and practical application potential.

The invention discloses a method for improving characteristics of an optical thin film through doping, and belongs to the technical field of thin film preparation. According to the method, based on a magnetron sputtering process, zinc oxide is taken as a target material, nitrogen is taken as a doping source, a coating-argon ion bombardment circulation technology is adopted in a coating process, a film layer with weak binding force is periodically removed, and layer-by-layer densification growth of a film is realized. And after deposition is completed, high-temperature annealing treatment is performed on the film under nitrogen protection, so that internal stress is effectively eliminated, and uniform doping and ordered distribution of nitrogen atoms in ZnO crystal lattices are promoted. Through the synergistic effect of bombardment-deposition circulation and atmosphere annealing, the crystallization quality, the structural stability and the interface bonding strength of the nitrogen-doped ZnO thin film are remarkably improved, and particularly, the fluorescence characteristic is remarkably enhanced. The method is controllable in process, good in repeatability and suitable for various substrates, and an effective way is provided for preparation of high-performance optoelectronic devices.

The invention develops a dual-mode optical sensor based on CuO2 nanodots. The dual-mode optical sensor is mainly applied to detection and research of a Warburg effect of gastric cancer. The CuO2 nanodots can catalyze the reaction of o-phenylenediamine (OPD) and hydrogen peroxide (H2O2), so that the color of the solution is changed from colorless to yellow along with the increase of absorbance and fluorescence intensity. Based on the reaction, a dual-mode sensor is designed, and the activity of lactic acid and lactate oxidase is synchronously detected through colorimetry and fluorescence. In the process of catalyzing lactic acid to generate H2O2 by lactic acid oxidase, the generated H2O2 promotes the color of a solution to change remarkably, so that the sensitive detection of the activity of lactic acid and oxidase thereof is indirectly realized. As the Warburg effect of the gastric cancer causes rise of the lactic acid level, the sensor can effectively associate the lactic acid level with the metabolic characteristics of the gastric cancer. In addition, in combination with an RGB colorimetric analysis technology, a smart phone is used for capturing color changes and carrying out image quantitative analysis, a portable, low-cost and high-sensitivity detection system is formed, and the application blank of the CuO2 nanodots in the field is filled up.

The invention discloses a high-toughness PA composite material and a preparation method thereof, and relates to the technical field of PA composite materials. The invention discloses a high-toughness PA composite material. The composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of polycaprolactam resin, 8 to 12 parts of maleic anhydride grafted polyolefin elastomer, 5 to 8 parts of modified nano calcium carbonate, 10 to 15 parts of modified glass fiber, 0.2 to 0.4 part of antioxidant 1098, 0.1 to 0.3 part of antioxidant 168, 0.3 to 0.5 part of zinc stearate, 3 to 5 parts of ethylene-vinyl acetate copolymer, 1 to 2 parts of organic montmorillonite and 0.5 to 1 part of titanate coupling agent NDZ-101. 0.8 to 1.2 parts of a caprolactam chain extender, and 0.1 to 0.2 part of dibenzylidene sorbitol. According to the high-toughness PA composite material, the polycaprolactam resin is used as a basis, and the modified nano calcium carbonate and the modified glass fiber are matched to enhance toughness and strength, so that the product is high in toughness and good in practicability.

The invention relates to the technical field of functional materials, and discloses a nickel-based chalcogenide catalyst and a preparation method and application thereof.The preparation method comprises the steps that Ni-MOF precursor powder is prepared through coordination; carrying out chemical vapor deposition reaction on the Ni-MOF precursor powder and chalcogenide elementary substance powder, pyrolyzing and grinding to obtain the nickel-based chalcogenide catalyst. The electron deficiency degree of the nickel site can be regulated and controlled through the chalcogenide element, and in a membrane electrode assembly test, the prepared nickel-based chalcogenide catalyst shows excellent CO selectivity and stability and is suitable for preparing carbon monoxide through carbon dioxide electroreduction.

The method for liquid crystal optical phased array beam control based on Smith prediction two-degree-of-freedom fractional order internal model PID relates to the technical field of laser beam control, and solves the problem that the existing LCOPA beam deflection system has low control precision and stability due to environmental temperature interference and response delay. The method introduces a Smith predictor to compensate for system time delay, so as to eliminate oscillation and overshoot caused by data transmission and processing lag. Then, a two-degree-of-freedom fractional order internal model PID controller is constructed by combining fractional calculus theory and internal model control principle. Finally, the whale optimization algorithm is used to globally optimize and set the key parameters of the controller to determine the optimal control parameters. Compared with traditional control methods, the method has better robustness and dynamic performance, can effectively improve the beam pointing precision and system stability, and is suitable for precise control of laser beams in complex environments.

The invention relates to the technical field of cell culture, and discloses a tracheal epithelial cell and application thereof, the cell is a guinea pig tracheal epithelial immortalized cell, and the preservation number is CGMCC No. 46763. In the invention, the cell has good susceptibility to respiratory pathogens, and has excellent transfection efficiency. The cells can be used for separating or culturing respiratory pathogens, preparing respiratory pathogen vaccines, screening and / or preparing medicines for preventing and / or treating diseases caused by the respiratory pathogens, serving as host cells for researching the respiratory pathogens, detecting the respiratory pathogens for a non-diagnostic purpose and constructing organoids. The method has high scientific research value and practical application potential.