16results about How to "Realize controllable adjustment" patented technology

This invention provides a biomimetic periodontal complex multilayer hydrogel tissue engineering scaffold, its preparation method, and its application, relating to the technical field of tissue engineering scaffolds. The biomimetic periodontal complex multilayer hydrogel tissue engineering scaffold comprises, from the inside out, a cementum repair layer, a periodontal ligament repair layer, and an alveolar bone repair layer; the cementum repair layer and the alveolar bone repair layer include a mineralized hydrogel layer; wherein the raw materials for preparing the mineralized hydrogel layer include modified hyaluronic acid, methacrylamide type I collagen, and hydroxyapatite; the alveolar bone repair layer includes a non-mineralized hydrogel layer; wherein the raw materials for preparing the non-mineralized hydrogel layer include modified hyaluronic acid, methacrylamide type I collagen, and fibrin I. This invention precisely matches the mechanical and biological requirements of each layer of the periodontal complex through a three-layer structure, a reversibly hydrazone-regulated viscoelastic gradient, and a differentiated biochemical microenvironment of nHAp / FBN1.

The invention discloses a structure-enhanced starch-based aerogel capable of improving porosity as well as a preparation method and application thereof, the aerogel comprises enzyme modified starch and natural starch, and the enzyme modified starch is obtained by improving the natural starch by adopting a compound enzyme system composed of multiple amylases. The method comprises the following steps: S1, modifying natural starch through a compound enzyme system to obtain enzyme modified starch; s2, mixing the enzyme modified starch with natural starch in proportion, adding water to form a composite suspension, and performing gelatinization treatment to obtain a gelatinized starch system; and S3, carrying out gelation, freezing and drying treatment on the gelatinized starch system to obtain the aerogel. The aerogel can be applied to thermal insulation materials, adsorption materials, bio-based structural materials or functional porous materials. The molecular structure of the starch is controllably adjusted through the synergistic effect of different enzyme systems, so that the porosity, the structural uniformity and the mechanical stability of the aerogel are remarkably improved on the premise of not introducing a chemical cross-linking agent.

The invention relates to the technical field of biomedical materials, in particular to a nano assembly for releasing NO through red light triggering and a preparation method and application of the nano assembly. The nano assembly is prepared from an amphiphilic block polymer with a polyethylene glycol hydrophilic end and a hydrophobic segment containing NO donor molecules and photocatalyst molecules through a hydrophilic and hydrophobic self-assembly forming method. Photocatalyst molecules in the amphiphilic block polymer are excited under irradiation of red light, decomposition of NO donor molecules can be triggered through an electron transfer process, and space-time controllable adjustment of NO release is achieved. The nano assembly has the red light response characteristic, excellent biological safety and antibacterial property, and has a wide application prospect in the aspects of antibiosis, anti-inflammation and the like. In addition, the red light has the characteristics of large tissue penetration depth and low phototoxicity, so that the problem that the penetration depth of the traditional ultraviolet light or blue light response NO donor molecular monomer is limited is effectively solved.

The application discloses a rotor channel rotary positive displacement type liquid pressure energy recovery device, which comprises a sleeve with a cylindrical hollow cavity, a central shaft, a rotor, a flow guide end cover and a sealing end cover arranged in the sleeve, locking pieces are arranged at the length ends of the central shaft, the locking pieces limit the spacing between the two sealing end covers, so that a gap d is formed between the flow guide end cover and the rotor, and rotor channels are arranged on the rotor and take the specific spiral as a reference. Through the structural optimization, the application overcomes the high-precision machining limitation of the existing rotary energy recovery device, reduces the liquid leakage between the end face and the rotor, optimizes the rotor channel structure, improves the stability of the fluid flow in the rotor channel, reduces the rotor vibration, the fastener is a fastening nut, the adjustment of the gap between the rotor and the flow guide end cover can be realized, and the adaptability of different flow / pressure and higher energy recovery efficiency is improved.

The invention discloses an enhanced CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) / Cas12a electrochemical sensor based on a three-dimensional nano channel electrode limit domain. According to the electrochemical sensor, a three-dimensional nano channel electrode is constructed by utilizing a micro-nano machining technology and a dealloying process, and the pore diameter and the specific surface area of a nano channel are cooperatively regulated and controlled through a thermal annealing method and an electrochemical coarsening method. Based on the three-dimensional confinement characteristic of the three-dimensional nano-channel electrode, the electrochemical sensor efficiently coupled with a CRISPR / Cas12a system is constructed by the sensor. The Cas12a shearing reaction time is successfully shortened to 15 minutes from 2 hours required by a traditional planar electrode, ultra-sensitive detection of HPV-16 nucleic acid is achieved, the sensitivity is improved by about 20 times compared with that of the planar electrode, and the detection limit is as low as 2.8 pM. The sensor provides an efficient, accurate and portable nucleic acid detection solution for the fields of early tumor screening, immediate diagnosis and the like.

This invention belongs to the technical field of additive manufacturing technology and discloses an in-situ oxygen-controlled composite scraper and a laser selective melting device equipped with the in-situ oxygen-controlled composite scraper. The bottom of the composite scraper includes a second scraper (16), an air jet unit, and a first scraper (18) arranged sequentially along the powder spreading direction. It has an internal gas storage chamber (15) and a powder drop chamber (19). The first scraper is used to evenly spread the powder raw material to form an initial powder layer. The air jet unit performs in-situ oxidation treatment on the surface of the initial powder layer by spraying oxygen-containing gas. The second scraper is used to level and compact the powder layer after the in-situ oxidation treatment. This invention improves the composition and structure of the composite scraper and utilizes the overall cooperation of the first scraper, the air jet unit, and the second scraper to generate a synergistic mechanism of powder spreading, in-situ oxidation, and secondary compaction, breaking through the process limitation that it is difficult to construct oxide dispersion-strengthened structures in-situ during additive manufacturing.

The application discloses a method for removing organic pollutants in water bodies by activating persulfate, and comprises the following steps: adding a metal precursor into a solvent to obtain a metal precursor solution; adding an organic ligand into the solvent to obtain a ligand solution; adding the ligand solution into the metal precursor solution and adding an additive to react, and after the reaction is completed, post-treatment is performed to obtain a conductive coordination polymer containing metal-nitrogen active sites; and the conductive coordination polymer and the persulfate are put into the water body containing the organic pollutants to complete degradation of the organic pollutants. The conductive coordination polymer containing the metal-nitrogen active sites is used as a catalyst, high-density and active center coordination configuration adjustable metal-nitrogen active sites are used to efficiently activate the persulfate, and the purpose of quickly removing the organic pollutants in the water bodies is achieved.

The invention discloses an adjustable light field leading-out method and system based on a hollow-core anti-resonance optical fiber, and relates to the technical field of optical energy transmission, and the method comprises the steps: employing the hollow-core anti-resonance optical fiber with a five-tube nested structure and multiple layers of anti-resonance air rings; a geometric opening is formed in the outer diameter area of the cladding of the hollow-core anti-resonance optical fiber, so that a lateral leading-out port is formed; establishing an optical fiber electromagnetic model comprising the port through finite element simulation, and adjusting structural parameters of the lateral leading-out port in simulation; and determining a group of optimized structure parameters based on the finite element simulation, so that the port can directionally couple specific light field mode energy conducted in the fiber core to the outside of the optical fiber at a predetermined efficiency when locally disturbing a cladding anti-resonance condition. Lateral efficient and controllable leading-out of an optical field in the hollow-core anti-resonance optical fiber is achieved, good mode selectivity is achieved while low-loss transmission is achieved, and the hollow-core anti-resonance optical fiber is suitable for a high-density optical interconnection and sensing system.

The application provides a kind of for the material surface interface damage in-situ characterization environment bin of multi-factor coupling corrosion, it is related to in-situ detection equipment technical field, to solve the technical problem that cannot simulate marine atmospheric corrosion environment and provide in-situ test condition for sample in prior art;A kind of for the material surface interface damage in-situ characterization environment bin of multi-factor coupling corrosion, simulates the marine atmospheric corrosion environment of high humidity, high salt, temperature and other multi-factor coupling, wherein, salt fog generating device simulates the salt fog condition in marine atmosphere, laser heating module provides controllable thermal field, corrosion resistant loading platform provides controllable force field, so as to realize the simulation of thermal, salt, force multi-field coupling corrosion;At the same time, high temperature electrochemistry module can carry out in-situ monitoring of corrosion electrochemistry, X-ray entrance window and X-ray exit window allow X-ray diffractometer to carry out diffraction test, observation module directly carries out in-situ observation of corrosion, realizes the composite in-situ characterization technology under multi-factor simulation working condition.

This application discloses a palladium-hydrogen rare earth nanoalloy material, its preparation method, and its application. The palladium-hydrogen rare earth nanoalloy material includes a carbon support and PdREH nanomaterials loaded on the surface of the carbon support. x Nanoparticles, PdREH x The nanoparticles comprise an alloy of Pd and rare earth elements (RE), and hydrogen embedded in the alloy lattice; wherein the rare earth element RE is one of Y, Ce, Sm, Gd, and Tb. This application constructs a nanoalloy material with a stable lattice structure and good hydrogen intercalation capability by forming an alloy of palladium and rare earth elements and further intercalating hydrogen. Simultaneously, by combining a carbon support with a two-step Joule thermal-hydrothermal preparation process, the composition and structure of the material can be controllably adjusted. This material exhibits excellent electrochemical response sensitivity, high ethylamine production capacity, and high Faradaic efficiency in the acidic electrocatalytic hydrogenation of acetonitrile to ethylamine reaction, making it suitable for low-resistance proton exchange membrane devices.

The invention discloses a bent hole inner surface polishing and strengthening treatment device and method. External controllable square planar magnetic fields are placed on the front side, the rear side, the left side and the right side of a to-be-ground workpiece with a bent hole, and an external controllable annular magnetic field surrounds the periphery of the to-be-ground workpiece with the bent hole as the center; the soft magnetic grinding head is formed by detachably connecting multiple stages of grinding heads in series front and back through rotary connecting pieces, the innermost part of each stage of grinding head is provided with an air bag, the outer surface of the air bag is tightly attached to an internal framework, the outer surface of the internal framework is tightly attached to a magnetic carrier layer, and an abrasive particle layer is embedded in the outer surface of the magnetic carrier layer. The particles of the abrasive particles on the front-stage grinding head are larger than the particles of the abrasive particles on the rear-stage grinding head; active bending of the grinding head in the stretching-in process and expansion from inside to outside in the grinding process are achieved, rough grinding, accurate grinding and polishing are conducted from front to back, the grinding state is maintained through inflation, the abrasive particle layer is separated from the hole wall through deflation, and controllable adjustment of the grinding area is achieved.

The invention discloses a high-transmissivity amorphous zinc nitride film and a preparation method thereof, and relates to the technical field of semiconductor film materials.The preparation method comprises the following steps that firstly, a quartz substrate is selected as a substrate, metal zinc is selected as a sputtering target material, the distance between the substrate and the target material is adjusted, and a vacuum cavity cover is covered; vacuumizing, heating the substrate, introducing nitrogen and argon into a vacuum cavity, and pre-sputtering the metal zinc in a radio frequency magnetron sputtering mode without opening a target baffle; opening a target baffle, performing radio frequency magnetron sputtering on the pre-sputtered metal zinc, and depositing a zinc nitride film on the substrate; and finally, carrying out cooling treatment to obtain the amorphous zinc nitride film. According to the high-transmissivity amorphous zinc nitride film and the preparation method thereof, key parameters such as sputtering air pressure are controlled within a specific range, the growth kinetics of the film is effectively regulated and controlled, and the average transmissivity of the prepared amorphous zinc nitride film in a visible-near infrared light region is as high as 73%-86.6%.

The application discloses a kind of sodium ion battery high-entropy prussian blue-based positive electrode materials and preparation method thereof, it is related to battery positive electrode material technical field.The chemical formula of positive electrode material is Na x M[Fe(CN)6], wherein, 0≤x≤2;The M includes five and more than five transition metal elements.The present application controls the nucleation and growth rate of the material by complexing agent assisted coprecipitation method, adjusts the hydration tendency of N-coordinated metal ions by high-entropy composition, and further realizes the direct controllable synthesis of low-content anion defect and coordination water molecules of high-entropy prussian blue-based positive electrode material;In addition, low defect, high-entropy stability and multi-element synergistic effect can effectively inhibit the complex sodium ion storage phase change behavior and serious Jahn-Teller effect in the charging and discharging process, so as to achieve the effect of stabilizing the crystal structure of the material, and obtain high-entropy positive electrode material with high energy density, high power density and long cycle life.

The application discloses a preparation method of a sulfur-selenium antimony sulfide material for a sodium ion battery negative electrode. The sulfur-selenium antimony sulfide material is prepared by a hydrothermal reaction combined with high-temperature sintering with antimony oxide powder, sulfur powder and selenium powder as raw materials, and the composition of the material can be controlled by adjusting the proportion of sulfur and selenium. The method is simple in operation and good in repeatability, and the obtained material is stable in structure and can be used as a sodium ion battery negative electrode material.

The invention relates to the technical field of textile fabrics, in particular to a cationic double-color small check fabric which comprises a breathable perspiration layer, a base cloth layer, a cationic functional layer and a wear-resistant anti-ultraviolet layer which are sequentially arranged from inside to outside. The production equipment for the cationic double-color small-grid fabric comprises an outer cylinder, the inner portion of the outer cylinder is hollow, sliding grooves are formed in the side wall of the outer cylinder in the circumferential direction, sliding blocks and elastic pieces are arranged in the sliding grooves, the elastic pieces are used for supporting the sliding blocks to abut against the other ends of the sliding grooves, the sliding blocks are provided with blocking pieces stretching into an inner cavity of the outer cylinder, and the sliding blocks are provided with yarn guide rings stretching out of the outer cylinder; the axis of the yarn guide ring is parallel to the axis of the outer cylinder; and the mandrel is coaxially and rotatably arranged in the inner cavity of the outer cylinder, and the surface of the mandrel is provided with a shifting piece used for shifting the blocking piece in the generatrix direction. According to the cation double-color small check fabric and the production equipment thereof, the yarn arrangement uniformity and regularity of the cation double-color small check fabric of a multi-layer structure are improved, and the fabric quality is improved.

This invention provides a Y-doped AB2-based hydrogen storage alloy material resistant to humid air poisoning and its preparation method, belonging to the technical field of hydrogen storage materials. The general chemical formula of the Y-doped AB2-based hydrogen storage alloy material of this invention is: (Ti a Zr b ) c Cr d Mn e V f + x wt.%Y, where a, b, c, d, e, and f are molar ratios. x The values ​​are by weight percentage. The Y-doped AB2-based hydrogen storage alloys of this invention retain over 85% of their hydrogen storage capacity after humid air poisoning, existing in elemental Y form. In contrast, the capacity retention rates of undoped hydrogen storage alloys and AB2-based hydrogen storage alloys existing in the form of Y2O3 are 68% and 69.22%, respectively, after humid air poisoning. This invention features a mature and convenient preparation process, exhibits excellent resistance to humid air poisoning, and helps to extend the service life of hydrogen storage materials in gas-solid composite hydrogen storage devices.