25 results about "Porous microstructure" patented technology

The invention discloses a method for efficiently generating high-brightness gamma radiation, and belongs to the technical field of radiation. A relativistic electron beam is injected into the porous microstructure foam target material, and high-brightness gamma ray radiation is generated. According to the method, the used device is simple, only the single relativistic electron beam and the porous microstructure foam target material are needed to interact, compared with a traditional uniform-density solid material, the energy conversion efficiency in the interaction process of the electron beam and a substance can be remarkably improved, and the energy conversion efficiency can be remarkably improved through the effective constraint effect of a high-intensity magnetic field. And the problems of low energy conversion rate, low light source brightness, poor radiation directivity, complex device or difficulty in experiment implementation and the like of the existing high-energy gamma ray radiation source are solved.

The invention discloses an empty pulp fiber material weft knitting fabric as well as a preparation method and application thereof, and relates to the field of garment fabrics. The hollow pulp fiber material weft knitting fabric is provided with at least one weave structure, and the weave structure is selected from at least one of twill two-position clothes, wicker ribs and single-face jacquard. The fabric comprises a weft knitting structure formed by weaving blended yarns of empty pulp fibers and cotton. The hollow pulp fiber has a porous microstructure, the cross section of the hollow pulp fiber is hollow and porous, and micropores are distributed on the surface of the longitudinal section of the hollow pulp fiber. The hollow pulp fiber material weft knitting fabric has a unique porous structure, the cross section of the hollow pulp fiber material weft knitting fabric is in a hollow porous shape, and micro-pores are distributed in the longitudinal section of the hollow pulp fiber material weft knitting fabric, so that the hollow pulp fiber material weft knitting fabric is a physical basis for achieving functional advantages of high specific surface area, high moisture regain, hollow heat storage and the like of the fabric, and is fundamentally different from common polyester or special-shaped polyester; the source guarantee is provided for the cooperation of multiple functions such as moisture absorption and sweat releasing, heat preservation and heat insulation.

The invention discloses a porous microstructure foaming white cement radiation refrigeration composite material and a preparation method thereof, and belongs to the technical field of building energy-saving materials.According to the material, sulphoaluminate white cement serves as a base material, a foaming agent is added, and evenly-distributed porous microstructures are formed in the preparation process; by utilizing the synergistic effect of the high reflection characteristic of the sulphoaluminate white cement and the enhanced scattering and heat insulation performance of the porous microstructure, the efficient radiation refrigeration function is realized; the problems that a traditional white cement material is low in radiation refrigeration efficiency and insufficient in heat insulation performance are solved, the preparation process is simple, the cost is controllable, the material can be widely applied to building exterior walls, roofs and other building envelopes, and remarkable energy-saving benefits and market application prospects are achieved.

The invention relates to the field of inorganic materials, in particular to a preparation method and application of antimony trioxide, an emulsifier, a water phase and mineral oil are mixed to obtain W / O emulsion, after the W / O emulsion is irradiated by ultraviolet light, an alcohol phase containing an organic antimony precursor is added, after stirring reaction, standing, centrifugation, sediment collection, washing and calcination are performed, and the antimony trioxide is obtained. The antimony trioxide prepared by the method provided by the invention has a special hollow porous microstructure structure, and is a very potential pseudocapacitor electrode material.

The invention relates to a preparation method of a hardness-adjustable microstructure antireflection film for a solar cell cover plate, and the method comprises the steps: S1, preparing a coating sol emulsion: mixing a precursor of a film forming material with an alcohol solvent, adjusting the pH value of a reaction system to be acidic or alkaline, and carrying out a first-stage stirring reaction; adjusting the reaction system to be slightly neutral or slightly acidic, adding a thermally-decomposable pore-forming emulsion and an emulsifier, carrying out a second-stage stirring reaction, and aging to obtain a coating sol emulsion; s2, coating and heat treatment: coating the surface of a glass substrate with the coating sol emulsion by adopting a roller coating method, and then carrying out heat treatment on the coated glass substrate; the heat treatment comprises preheating treatment for preliminarily curing the thin film and a tempering process for tempering the glass substrate and completely curing the thin film at the same time; in the tempering process, the pore-forming emulsion is pyrolyzed, and a porous microstructure is formed in the cured film. The hardness of the thin film can be effectively regulated and controlled, and the high anti-reflection effect is achieved through the microstructure.

The application relates to a kind of electrochemical oxidation synthesis ozone device and method based on patterning diamond, belong to electrochemistry technical field, device includes the first shell and second shell connected, the first shell is opened with reaction groove, water is passed to reaction groove in working process;Reaction groove is close to the side of water inlet and is provided with turbulence generator;Patterning diamond anode and patterning cathode are attached to the two sides of proton exchange membrane and constitute electrode group and are arranged in the reaction groove, parallel to the water inlet end and water outlet end of reaction groove and are connected to form straight line;The two sides of electrode group are pressed with metal current collector.The turbulence generator is water wheel or porous microstructure.The application can overcome the problems of poor mechanical strength of traditional through-hole diamond electrode and difficult water and gas transmission on the surface of electrode, while increasing the electrochemical active area of electrode, and thus improving the ozone concentration, reaction efficiency and operating life of the electrochemical oxidation synthesis ozone device.

The application discloses a modular flexible bionic hand based on a dual-mode wire driving, and belongs to the technical field of robots. The dexterous hand comprises a finger assembly, a palm base assembly, an independent driving module, a coupling driving module, an arm base assembly and a tendon; the inner cavity of the arm base assembly is provided with the coupling driving module for driving the opening and closing of the thumb, the index finger and the middle finger simultaneously, and the independent driving module for driving the independent bending of each finger and the lateral bending of the thumb. The bionic hand can be provided with 7 degrees of freedom, adopts a tendon driving mode; the finger assembly is composed of five modular flexible fingers; the knuckles adopt equidistant porous microstructures to improve the shape adaptability and impact resistance, realize the positive active bending and the lateral passive bending; the external driving makes the driving module away from the end effector, and is beneficial to improving the dynamic performance of the bionic hand. The application adopts modular assembly, has the advantages of reliable structure, convenient manufacturing, light weight, high efficiency and low cost.

The invention belongs to the technical field of thermal protection, and relates to a flexible thermal protection structure of a sensor cable in high-temperature test equipment and a preparation method of the flexible thermal protection structure. Comprising an inner fastening coating layer made of a knitted stainless steel mesh; the inner fastening coating layer is used for fastening and coating a sensor cable; the flexible heat insulation layer is tightly coated outside the inner fastening coating layer; the flexible heat insulation layer is made of a flexible alumina fiber needled carpet; the flexible heat insulation ceramic material layer is coated outside the flexible heat insulation layer; the flexible heat insulation ceramic material layer is made of a ceramic nano material with a porous microstructure; the flexible sealing layer is coated outside the flexible heat insulation ceramic material layer; the flexible sealing layer is made of polyimide; the force-bearing shape-fixing layer is wound and coated outside the flexible sealing layer; and the force-bearing shape-fixing layer is made of a glass fiber aluminum foil adhesive tape. The heat insulation performance of the sensor cable is remarkably improved, the service life of the sensor cable in a high-temperature environment is remarkably prolonged, and therefore the accuracy of data collection and the safety of system operation in the high-temperature testing process are ensured.

This application discloses a semi-solid encapsulation particle containing bamboo charcoal filler. The semi-solid encapsulation particle comprises the following components by weight: A. 80-120 parts epoxy resin; B. 150-250 parts modified bamboo charcoal; C. 3-7 parts curing agent. In this solution, modified bamboo charcoal replaces the silica filler in the prior art. Due to the honeycomb-like porous microstructure of bamboo charcoal, the migration path of external pollutant ions into the chip inside the encapsulation layer is significantly increased due to the tortuous channels, improving the environmental protection performance of the encapsulation chip material. Furthermore, through the synergistic effect between epoxy resin and modified bamboo charcoal, the epoxy resin forms multiple micro-curing pillars within the pores of the modified bamboo charcoal, thereby generating strong mechanical locking force and shear strength of the encapsulation material. This not only effectively alleviates the thermal expansion coefficient mismatch stress between the chip and the encapsulation material but also solves the technical problem of encapsulation layer cracking.

The invention discloses a magnetic control semi-filled microsphere flexible sensor and a preparation method thereof, and belongs to the technical field of sensors, the sensor comprises a flexible dielectric layer and an electrode layer, the flexible dielectric layer comprises a flexible substrate and magnetic control semi-filled microspheres with internal core-shell structures; the magnetic control semi-filled microsphere comprises a rigid insulating shell and magnetic conductive powder in an inner cavity. The preparation method comprises the following steps: firstly, preparing a polymer microsphere core containing magnetic conductive powder, and coating a silicon dioxide shell layer on the surface of the microsphere; performing high-temperature heat treatment in a protective atmosphere to form a porous structure; and dispersing the obtained functional microspheres in a flexible matrix precursor, and carrying out curing molding. According to the invention, a unique core-shell structure and a porous microstructure are constructed, the distribution of powder in the microspheres is regulated and controlled by using an external magnetic field, the effective compressible volume and support rigidity of the microspheres in the compression direction are changed, and the problems of poor dispersibility, easy agglomeration and weak interface bonding force of a traditional magnetic conductive material in a flexible matrix are solved; and the sensitivity and the measuring range of the sensor can be regulated.

The application discloses a kind of magnetically controlled semi-filled microsphere flexible sensors and preparation method thereof, belong to sensor technical field, sensor includes flexible dielectric layer and electrode layer, flexible dielectric layer includes flexible matrix and internal core-shell structure magnetically controlled semi-filled microsphere;Magnetic control semi-filled microsphere includes rigid insulating shell and inner cavity's magnetic conductive powder.It is first prepared and the inner core of polymer microsphere containing magnetic conductive powder is coated with silica shell layer on the surface of microsphere;Subsequently, high-temperature heat treatment is carried out under protective atmosphere to form porous structure;The obtained functional microspheres are dispersed in flexible matrix precursor and solidified into shape.The application constructs unique core-shell structure and porous microstructure, uses external magnetic field to control the distribution of powder inside microsphere, changes the effective compressible volume and support stiffness of microsphere in pressure direction, solves the problem that traditional magnetic conductive material is poor in dispersibility, easy to agglomerate and weak in interface bonding force in flexible matrix, realizes the adjustable control of sensor sensitivity and range.

The invention discloses a cascade annular thermo-acoustic stack integrated packaging cooler driven by high-frequency piezoelectricity. The cascade annular thermo-acoustic stack integrated packaging cooler comprises a high-frequency piezoelectric driving sound source, a miniature resonant cavity, a first low-temperature heat exchanger, a first porous microstructure stack, a first heat exchange channel, a second heat exchange channel, a second porous microstructure stack and a second low-temperature heat exchanger. The high-frequency piezoelectric driving sound source is arranged at one end of the micro resonant cavity; the first porous microstructure stack and the second porous microstructure stack are arranged in the miniature resonant cavity at an interval; the outer end of the first low-temperature heat exchanger is connected with the heat source chip, and the inner end of the first low-temperature heat exchanger is connected with the first porous microstructure stack; the first porous microstructure stack, the first heat exchange channel, the second heat exchange channel and the second porous microstructure stack are connected in sequence; the inner end of the second low-temperature heat exchanger is connected with the second porous microstructure stack, and the outer end of the second low-temperature heat exchanger is located in the external environment.

The invention relates to the technical field of proton exchange membrane water electrolysis hydrogen production, and provides a method for predicting the gas holdup of a porous microstructure flow PEM hydrogen production device, which comprises the following steps: acquiring basic parameters of a porous flow field; establishing a two-dimensional gas holdup prediction mathematical model for describing the change of gas phase and liquid phase mass flow in unit width of the porous flow field along the flow direction; determining boundary conditions of a flow field inlet and a side wall of the porous flow field to construct a complete two-dimensional boundary value problem; establishing a function relationship between the local gas holdup and the basic parameters; and on the basis of the function relationship and the two-dimensional boundary value problem, carrying out on-way solving calculation so as to output the gas holdup at each differential position in the fluid flowing direction as a two-dimensional gas holdup distribution prediction result of the porous flow field in the length and width directions. The gas holdup prediction method can give consideration to both calculation efficiency and prediction precision, and is easy to couple electrochemical variables.

The invention relates to the technical field of medical materials, and particularly discloses a titanium surface composite coating with osteogenesis promoting and antibacterial functions. The micro-arc magnesium oxide coating is arranged on the surface of the titanium substrate; the chitosan coating is arranged on the surface of the micro-arc magnesium oxide coating; the chlorogenic acid is loaded in the chitosan coating; a magnesium-containing porous microstructure is constructed on the surface of a titanium substrate through a micro-arc oxidation technology, so that the biological activity and corrosion resistance of the coating are improved; furthermore, chitosan is used as a biocompatible carrier to load a traditional Chinese medicine active ingredient chlorogenic acid, so that the surface of the implant has excellent osteogenic differentiation promoting capability and broad-spectrum antibacterial property at the same time. Physical modification, biopolymer drug loading and traditional Chinese medicine active ingredients are combined, and the problems that a traditional titanium implant is high in surface biological inertness, infection is likely to be caused and osseointegration is poor are solved through the synergistic effect on the three aspects of the structure, the material and the biological function.

This invention relates to a method for enhancing the activity of mineral admixtures in concrete, belonging to the field of building materials technology. It aims to solve the technical problem that while traditional mechanical grinding can improve the fineness of admixtures, it has limited impact on the vitreous structure, resulting in insufficient activity enhancement. This invention provides a method for enhancing the activity of mineral admixtures in concrete, comprising the following steps: raw material pretreatment: crushing and drying the mineral admixtures; plasma-assisted grinding: feeding the dried mineral admixtures into a plasma mill for mechanical grinding followed by plasma treatment; and then natural cooling to room temperature. The plasma-treated samples are finer and have a more porous microstructure; the 28-day activity index is 15%-30% higher than that of traditional grinding; the synergistic effect of plasma and mechanical force reduces energy consumption; the industrial waste residue has higher activity, allowing for a larger dosage in concrete and a more significant reduction in CO2 emissions.

This application provides a heat spreader and an electronic device. The heat spreader includes: a housing, wherein the housing includes a top cover and a bottom cover, the top cover and the bottom cover being connected to form a sealed cavity; and a core layer disposed in the sealed cavity, wherein the core layer includes a capillary structure, the capillary structure being formed by removing the top portion of a first region of a porous microstructure sheet using a thinning process. According to the above technical solution, interference of the heat spreader to other components can be reduced.

The application discloses a high-breakdown-strength battery diaphragm, a preparation method thereof and a battery. The high-breakdown-strength battery diaphragm comprises a porous microstructure, which contains a plurality of insulating core fibers and a voltage-resistant sheath layer coated on the insulating core fibers, and two or more insulating core fibers are interwoven to jointly define one or more micro-holes; the insulating breakdown strength of the high-breakdown-strength battery diaphragm is not less than 110 V / μm, and the core-sheath structure formed by coating the insulating core fibers with the voltage-resistant material maintains the overall thickness change rate of the diaphragm at a low level, so that the high insulating breakdown performance is realized at a low thickness increment.

The graphene micro-nano cavity heat conducting film has a thickness of 0.15-3 mm, achieves good heat conducting and electric conducting effects, and makes 80% of the rebound stress greater than or equal to 0.05 MPa. 2 The surface density of the graphene micro-nano cavity heat conducting film prepared by the application is 0.002 g / cm 2 ~0.2 g / cm 2 , which guarantees the application of the heat conducting film in pressure sensors, super capacitors, fuel cells, carbon catalytic materials, switches and optical modules. The graphene micro-nano cavity heat conducting film obtained by the application is composed of pure graphite components, has a fluffy and porous microstructure, and has uniform and stable performance. The graphene micro-nano cavity heat conducting film can also be used in combination with other materials in subsequent use, has a wide application range, a good prospect and diversified application fields, and is a rare high-heat-conducting and electrically-conducting material on the market.

This invention belongs to the field of pharmaceutical formulation technology, specifically disclosing a hydrogen storage composite metal-organic framework, its preparation method, and its applications. The preparation method of the hydrogen storage composite metal-organic framework includes the following steps: adjusting a gallic acid solution to alkalinity, adding magnesium chloride hexahydrate and reacting, centrifuging the magnesium-gallic acid metal-organic framework material to obtain Mg-GA-MOF; mixing Mg-GA-MOF with anhydrous ethanol, adding anhydrous sodium tetrachloropalladate solution in ethanol, equilibrating the solution, and slowly adding anhydrous sodium tetraborate solution in ethanol to obtain Pd / Mg-GA-MOF; and then loading with hydrogen. This invention utilizes both the porous microstructure of the MOF to physically adsorb hydrogen and the Pd nanoparticles embedded in the framework structure to chemically adsorb hydrogen. The combination of these two methods significantly improves the hydrogen loading efficiency of Pd / Mg-GA-MOF while exhibiting good biocompatibility. Furthermore, cell experiments show that Pd / Mg-GA-MOF can effectively scavenge various ROS and inhibit the inflammatory response of microglia, demonstrating high clinical application potential in stroke repair.

The invention relates to an environmental barrier coating and a preparation method thereof, and the coating sequentially comprises a hafnium oxide modified silicon base layer from a substrate to the outside, and the hafnium oxide modified silicon base layer forms high bonding strength with the substrate and improves the high temperature oxidation resistance and molten salt corrosion resistance through hafnium oxide modification; the hafnium silicate transition layer realizes gradient transition of thermal expansion coefficients, relieves interlayer thermal stress and optimizes the chemical compatibility of the bottom layer and the surface layer; the ytterbium silicate surface layer serves as a main heat insulation layer, the surface of the ytterbium silicate surface layer is provided with a honeycomb-shaped pore microstructure, and the pore diameter is gt; macropores with the diameter of 20 microns and the aperture of 1t; and 5-micron micropores are formed. According to the structure, rapid permeation and filling of CMAS melt are promoted through the macropores so as to shorten the retention time and accelerate crystallization, the micropores induce local supercooling through the capillary action to form a compact barrier layer to block melt permeation, all the layers cooperate to form complementation on corrosion resistance, thermal shock resistance and CMAS protection, and the requirement for long-term stability in the extreme environment of 1200-1600 DEG C is met.

The invention discloses a preparation method and application of a titanium cage with the surface coated with an Si-CaP coating, the surface of the titanium cage is coated with the Si-CaP coating with pores and baohuoside-at-fucoidin, the surface of the titanium cage is sprayed with the Si-CaP coating, the Si-CaP coating is of a porous microstructure, the roughness and porosity of a natural bone matrix are simulated, and the titanium cage has the advantages that the porosity of the titanium cage is improved; a vital three-dimensional space environment is provided for migration, adhesion, spreading and growth of osteoblasts and vascular endothelial cells, that is, the porous structure of the Si-CaP coating provides a physical basis for adhesion of the osteoblasts and precursor cells of the osteoblasts, while baohuoside-1 in the baohuoside-at-fucoidin is a bioactive small molecule, so that the baohuoside-1 in the baohuoside-at-fucoidin is a biologically active small molecule. Through slow release of dunaliella salina polysaccharide with certain biological activity, and through the synergistic effect of the biological activity of baohuoside-1 and fucoidin thereof and the Si-CaP coating, the time required for forming biological fixation between the titanium cage and the host bone can be remarkably shortened, and the early stability is effectively improved.

The invention belongs to the technical field of electronic packaging material analysis, and discloses a modeling method for a polycrystalline porous microstructure of a sintered nano-silver material, and the method comprises the steps: firstly carrying out the binarization processing of an SEM image of sintered nano-silver, and separating out a pore region and a solid-phase region; then extracting the contour of the pore region to obtain a discrete point set on the contour; based on the discrete point set, constructing geometric constraint conditions representing pore boundaries; then, by taking the geometric constraint condition as a boundary which cannot be invaded, performing constrained Delaunay triangulation in the solid-phase region, and generating a constrained Delaunay triangulation network; and finally, extracting a geometric dual graph of the constrained Delaunay triangulation network, and generating a Voronoi graph. According to the method, the limitation of simplifying pore morphology or neglecting solid-phase anisotropy in a traditional method is overcome, and a real and reliable geometric model basis is provided for high-precision finite element simulation.

The invention discloses a calcareous sand two-dimensional porous microstructure reconstruction processing method, system and platform based on a diffusion model and a storage medium. High-fidelity reconstruction and generation of a calcareous sand microstructure with an extremely complex form are realized by integrating principal component analysis directional alignment and a v prediction diffusion model; wherein the generated two-dimensional microstructure image is not only highly matched with a real CT slice in vision, but also shows high consistency in statistical distribution of 14 key morphology parameters such as porosity, fractal dimension, skeleton complexity and the like, and verifies the physical authenticity of the two-dimensional microstructure image. The method has dual capabilities of unconditional generation and conditional reconstruction, can synthesize a large number of statistical reasonable digital samples from zero to expand a scarce data set, and can intelligently enhance low-quality experimental images. And a stable, efficient and extensible digital material source is provided for discrete element numerical simulation, permeability characteristic prediction and microstructure-oriented constitutive model development of the calcareous sand.

The invention discloses a batch preparation method of a flexible high-sensitivity pressure sensor array, and the method comprises the steps: S1, mixing TPU powder with an N, N-dimethylformamide solvent to obtain a mixed solution A; s2, mixing the mixed solution A with MXene ink to obtain a mixed solution B; s3, two copper electrode circuits are prepared by adopting PI-copper foil; s4, preparing a cloth-based adhesive tape with a printing window pattern, and covering the first copper electrode circuit with the cloth-based adhesive tape to form a printing substrate; s5, printing the mixed solution B on the surface of a printing substrate by adopting a silk-screen printing technology; s6, removing the cloth-based adhesive tape, standing the copper electrode circuit of which the top surface is printed with the mixed solution B to cure the copper electrode circuit, and washing off the N, N-dimethylformamide solvent after curing to obtain a sensor sensitive layer with a porous microstructure; and S7, pasting a second patterned electrode on the top surface of the sensor sensitive layer to complete the preparation of the flexible pressure sensor array. According to the invention, the effects of high sensitivity and wide linear response range can be realized.