139results about How to "Achieve preparation" patented technology

The invention discloses a modified polylactic acid copolyester in the technical field of polymer materials. The modified polylactic acid copolyester is copolymerized by a poly-L-lactic acid prepolymer component a, a flexible degradable polyester component b and a poly-racemic lactic acid prepolymer component c through a chain extender to form a linear modified polylactic acid copolyester; the component a is prepared by ring-opening polymerization of L-lactide; the component b is a low molecular weight polyester; the component c is prepared by ring-opening polymerization of meso- / racemic-lactide; the chain extender is a polyisocyanate; the modified polylactic acid copolyester can be used to prepare a highly transparent biodegradable heat shrinkable film, the film has high heat shrinkage performance and puncture resistance, and is a degradable and environment-friendly material.

The embodiment of the invention discloses a video processing method and device, and relates to the technical field of Internet application. According to the main technical scheme, the method comprises the steps that in response to a first event, a third interface is displayed, and the third interface comprises information of multiple themes from a server side; in response to a selected event in the multiple themes, a first interface is displayed, and the first interface comprises multiple candidate videos corresponding to the selected theme; in response to a second event, the second event comprises selecting at least one candidate video from the plurality of candidate videos and displaying a second interface, the second interface comprises a target video obtained by performing aggregation processing on at least two videos, and the at least two videos comprise the at least one candidate video; and in response to an event for triggering release of the target video, sending information for releasing the target video to a server side. According to the invention, richer video publishing experience is provided for the user, and the video processing efficiency is improved.

The invention belongs to the field of composite material manufacturing, and relates to a manufacturing method of a composite material box-shaped beam with closed-angle ends. The composite material cover plate of the composite material box-shaped beam can be manufactured, and the structural form of the composite material cover plate can well act on curing forming of the composite material box-shaped beam. According to the invention, the manufacturing of the composite material box-shaped beam, the inspection of the axial direction size, the inspection of the profile size and the like can be realized. The invention innovatively provides a metal joint structure to replace a commonly used metal hinge support arm, and the metal joint structure has a function of measuring the profile precision of the inner profile of the edge strip of the composite box-shaped beam. The invention innovatively provides a split combined type forming tool and a measuring tool, and realizes a manufacturing process method of the composite material box-shaped beam with the closed angle at the end part. The measuring tool is innovatively provided, the measuring tool can measure the axial direction size of the composite material box-shaped beam, and the measuring range is large.

The invention provides a regeneration method of an aluminum-silicon alloy, a regenerated silicon-aluminum alloy and an iron-rich phase alloy. The regeneration method comprises the steps that S1, raw materials of the aluminum-silicon alloy are smelted, and a first melt is obtained; s2, an aluminum-manganese intermediate alloy and an aluminum-chromium intermediate alloy are added into the first melt, and a second melt is obtained; the second melt contains Fe element, Mn element and Cr element; s3, refining treatment is conducted on the second melt, and a third melt is obtained; and S4, the third melt is added into a casting mold, mechanical vibration is conducted on the casting mold under the vibration condition so that the third melt can be solidified, and the regenerated aluminum-silicon alloy and the iron-rich phase alloy are obtained. Vibration equipment is used for applying a vibration field to the casting mold, and meanwhile, the proportion of alloy elements and the smelting process are accurately controlled in a matched mode, so that preparation of the low-iron secondary aluminum-silicon alloy is achieved.

The invention discloses a preparation method of a chitosan oligosaccharide-anthocyanin nanocomposite. The preparation method comprises the following steps: dissolving purple corn anthocyanin in distilled water; dissolving chitosan oligosaccharide in distilled water; the method comprises the following steps: adding an organic solvent into a reaction kettle, reacting at room temperature in a dark place for 4-48 hours, transferring a mixed solution into a centrifugal tube, centrifuging for 10-30 minutes to separate out nano-composite precipitates and uncombined supernatant, and then adding ultrapure water for repeated centrifugation. And finally, carrying out freeze drying treatment on the precipitate to obtain the final chitosan oligosaccharide-anthocyanin nano-composite. The nano-composite prepared by the method has high stability, good dispersibility and enhanced biological activity, and provides a new way for wide application of chitosan oligosaccharide and anthocyanin in the fields of food, cosmetics, biological medicine and the like.

The invention discloses a device and a method for preparing a biochemical liquid drop sample regulated and controlled by a sound field and an electric field. The device comprises a sound focusing spray head, a three-axis motion platform and a digital micro-fluidic chip, acoustic waves generated by the Archimedes spiral interdigital transducer are adopted, the acoustic waves are focused at the nozzle when being transmitted to the tail end of the spray head, breakage and generation of liquid drops are promoted, and the size of the printing liquid drops is effectively controlled by adjusting sine alternating voltage parameter values and adjusting the printing speed of the liquid drops at the nozzle. The micro-electrodes integrated with the dielectrophoresis technology are adopted to generate dielectrophoretic force, directional movement of micro-droplets under the action of an electric field is achieved, by adjusting sine alternating voltage parameter values, the size of the moving droplets is adjustable, the droplets move to the mixing area, the mixing area vibrates under the resonant frequency of the piezoelectric plate, the droplets are promoted to be fully mixed, and the micro-droplets are fully mixed. The preparation of a biochemical liquid drop sample is realized; according to the invention, preparation of various biochemical liquid drop samples and fusion and mixing of various liquid drops can be realized, and a foundation is laid for further detection.

The invention discloses a cable stripping device for cable production, and relates to the technical field of cable production, the cable stripping device comprises a processing box, the bottom of the processing box is fixedly connected with supporting rods, the supporting rods are located at four corners of the bottom of the processing box, the cable stripping device further comprises a feeding mechanism, the feeding mechanism is arranged on the side wall of the processing box, and the feeding mechanism is arranged on the side wall of the processing box. The feeding mechanism comprises feeding rollers which are symmetrically arranged up and down, and a cleaning unit is arranged on one side of each feeding roller; the first-stage stripping mechanism is arranged on the inner side wall of the processing box and located on one side of the cleaning unit, and the cable stripping device has the advantages that an outer insulating layer and an inner insulating layer of a cable are stripped in a distinguished mode, meanwhile, the outer insulating layer and the inner insulating layer of the cable are collected in a distinguished mode, and the cable stripping efficiency is improved. And therefore, the inner layer insulating layer material and the outer layer insulating layer material can be conveniently recycled in the production process of the cable, and waste of resources is reduced.

The invention relates to the technical field of polystyrene foam plastic board preparation, in particular to a graphite-based molded polystyrene foam plastic board preparation process which comprises the following steps: material preparation, namely storage, precise material supply, mixing and stirring, foaming operation, extrusion molding, cutting preparation and cleaning storage. Through ingenious cooperation of components in the prior art, materials can be effectively subjected to mixed foaming operation, and a plate at an extrusion molding position is fully cut and treated, so that preparation of the graphite-based molded polystyrene foam plastic plate can be rapidly realized according to needs, and the preparation quality of the plastic plate can be effectively guaranteed.

The application relates to a method for preparing a deformable reinforcing metal matrix composite material by a pressure infiltration technology, and relates to a method for preparing a metal matrix composite material. In order to solve the problems of poor plasticity of the metal matrix composite material and difficulty in preparing a deformable reinforcing aluminum matrix composite material by a self-exhaustion pressure infiltration technology, the application mixes reinforcing body powder with polysilazane, and then sintering, the polysilazane is cracked at high temperature and a ceramic skeleton is generated, the structural strength of the preform in a high-temperature state is improved, and the success rate of the self-exhaustion pressure infiltration process for preparing the deformable reinforcing metal matrix composite material is effectively improved. The application realizes the function of preparing a heterogeneous aluminum alloy by the pressure infiltration technology, and has better strength-plasticity matching compared with a homogeneous alloy with the same composition.

The invention relates to the technical field of renewable concrete, in particular to renewable concrete and a production process thereof, and the concrete is prepared from the following raw materials: recycled aggregate, waste plastic fiber, cement, an additive component and water, the production work comprises the following steps: recycling, crushing and classifying the building waste, crushing and grinding the building concrete waste and storing the building concrete waste as aggregate, screening and storing other materials required by concrete preparation, stirring and mixing, storing the concrete, and conveying the concrete into a mixer truck for transferring. By using the recycled aggregate and the waste plastic fiber, the waste building material and corresponding plastic can be effectively recycled and used, the environmental protection performance can be better improved, the waste material can be quickly solved, and the strength and performance of the product can be improved; and meanwhile, how to use each device and how to prepare the recycled concrete by workers are clearly indicated.

The invention discloses an automated mass production forming device for solid bricks, which comprises: a chassis device, a forming device, a material distribution device and a punching device, a lower die plate, a support seat, a lower die seat, the outer surface of the lower die plate is provided with a cleaning groove, the forming device comprises: an upper die plate, an upper die seat, the outer surface of the upper die plate is fixedly connected with a toothed plate, the material distribution device comprises: a pillar, a material distribution box, the outer surface of the pillar is fixedly connected with an I-shaped bracket, the punching device comprises: a top beam, a fixed seat, a linkage cross beam, and a single-entry upper die cavity and a double-entry upper die cavity are provided in the forming device to realize double die casting of a brick in the process of solid brick pressing, and two groups of material distribution devices are provided to separate the raw materials of the die-cast brick body and the raw materials of the brick surface, and the chassis device and the forming device are provided in a disc shape so that they can rotate through the forming device during use, and the punching device adopts two groups of stamping parts to realize the synchronization of the two stamping processes.

The present invention provides a three-dimensional Raman enhanced membrane for rapid identification of bacteria and a method and system thereof, wherein the three-dimensional Raman enhanced membrane for rapid identification of bacteria comprises a polymer material layer; the polymer material layer is provided with a plurality of funnel-shaped through holes, and the polymer material layer and the surfaces of the plurality of funnel-shaped through holes are both provided with Raman enhanced material layers. The three-dimensional Raman enhanced membrane for rapid identification of bacteria described in the present invention has a plurality of funnel-shaped through holes added to the polymer material layer, and during the detection process, the contact area between the pathogenic bacteria and the through holes (i.e., the polymer material layer) is large, which can indirectly improve the sensitivity of the detection.

The application discloses a method for co-production of aviation kerosene precursor and carbon nanotubes from waste oil, which comprises the following steps: catalytic pyrolysis: under an inert atmosphere, oil compounds are subjected to catalytic pyrolysis under the action of a catalyst, and products are condensed to obtain non-condensable gas and liquid aviation kerosene precursor; non-condensable gas purification: CO2 and moisture in the non-condensable gas are removed to obtain purified gas; chemical vapor deposition: under the action of a foamed metal catalyst, the purified gas is subjected to chemical vapor deposition to obtain carbon nanotubes. The application realizes preparation of aviation kerosene precursor with hydrocarbon selectivity over 80% through catalytic pyrolysis, and has strong practicability in fuel deoxygenation; through reforming and upgrading of the non-condensable gas, preparation of carbon nanotubes is realized, and the added value of pyrolysis products is greatly improved. The application has a short path and low pollution degree, realizes resource utilization of waste oil, achieves the purpose of environmental protection, and has application value in the fields of energy and environmental protection.

According to the technical scheme, the manufacturing method of the aluminum nitride high-temperature co-fired ceramic tube shell comprises the steps that an upper part and a lower part of a green ceramic chip subjected to hole filling printing are laminated in a segmented mode, the upper part is the thickness of a boss, and the lower part is the thickness of a base; generating the appearance of the platform and a circle of blank outside the platform on the blank laminated on the upper part of the green ceramic chip, punching an electrostatic film, removing the electrostatic film in the middle of the platform, and carrying out secondary lamination and hot pressing on the base part of the blank of the green ceramic tape, the processed whole electrostatic film with the cavity, the platform part and the blank outside the platform on a lamination plate to obtain the green ceramic tape. And taking off the green body and the electrostatic film outside the platform from the laminated green ceramic block to obtain the green body of the product, and sintering the green body of the product to obtain the aluminum nitride high-temperature co-fired ceramic tube shell. According to the invention, the manufacturing of the isolated platform is realized by adopting a laminating method of combining the electrostatic film and the raw ceramic block, no connecting lappets need to be added, and the appearance of the ceramic is not influenced.

The present invention relates to a compressible and resilient chitosan / carbon black composite material, and a preparation method and application thereof. A compressible and resilient chitosan / carbon black composite material with a hierarchical structure having both rigidity and flexibility is prepared by an alkali replacement method assisted by an ice template. A three-dimensional porous chitosan / carbon black composite material is constructed by combining the hydrogen bonding within and between chitosan molecules using an ice template, thereby solving the problems of traditional chitosan hydrogels being easily broken, having low toughness, and having poor mechanical properties under high stress and strain. The chitosan / carbon black composite material has good compression and rebound effects under high stress and strain, and is used for evaporation and desalination of high-concentration brine. It can operate stably in high-concentration brine and has good salt resistance.

The present invention provides an additive for slowing down spontaneous activation of platelets in vitro. The additive of the present invention comprises two functional components, a platelet activation inhibitor and a blood anticoagulant, wherein the platelet activation inhibitor is used to slow down spontaneous activation of platelets in vitro, and the blood anticoagulant is used to prevent blood coagulation. The platelet activation inhibitor comprises a certain proportion of theophylline and aspirin. The present invention has found that the combined use of a certain proportion of theophylline and aspirin has a better effect of slowing down spontaneous activation of platelets in vitro than the single use of the two, and has a significant synergistic effect. The blood sample using the above additive can be stored at room temperature for 36 hours to meet clinical detection needs, greatly extend the storage time of the sample, and improve the accuracy of the detection.

The invention belongs to the technical field of powder metallurgy, and particularly relates to a preparation method of a titanium alloy part with a precise inner runner, which comprises the following steps: preparing a required inner runner structure model by adopting a 3D printing technology, obtaining a titanium alloy blank with an inner runner structure through positioning pressing, degreasing and sintering, and finally preparing the titanium alloy part with the precise inner runner according to the size requirement of a finished product. And the titanium alloy part with the fine inner runner can be obtained only by performing finished product processing on the appearance of the runner plate. According to the method, machining and subsequent welding procedures of the titanium alloy inner runner are avoided, the preparation period is greatly shortened, meanwhile, the problems of titanium alloy plate deformation caused by the inner runner machining process in a conventional method and welding defects, low welding yield and the like in the welding process are avoided, the yield of the runner plate can be effectively increased, and the production cost is reduced. And the production cost is greatly reduced.

The invention provides a position measurement device, a measurement method, a workpiece stage position compensation method, an exposure method and exposure equipment, and the measurement device comprises a first reflector, a second reflector, a first interferometer reference axis, a second interferometer reference axis and a data processing module. The first reflecting mirror and the second reflecting mirror are arranged at the bottom of the objective lens; the first interferometer reference axis is configured to measure a first horizontal displacement of the objective lens; a second interferometer reference axis configured to measure a second horizontal displacement of the objective lens; the data processing module is configured to determine the deflection angle of the objective lens according to the first horizontal displacement and the second horizontal displacement of the objective lens and the height difference between the first interferometer reference axis and the second interferometer reference axis. According to the invention, the deflection angle of the objective lens can be measured, so that errors caused by deflection of the objective lens can be compensated to the position of the workpiece table, and the influence of the position offset of the objective lens on the overlay precision can be reduced.

This invention relates to the field of new energy and discloses a highly selective photocatalytic method for producing acetone from methane. The method includes: placing a transparent substrate coated with a photocatalyst in a photocatalytic reactor, adding liquid water, introducing methane gas to purge air, sealing the photocatalytic reactor, and conducting a gas-solid two-phase photocatalytic reaction under light irradiation and heating at 50-100°C to generate a liquid oxygen-containing organic compound, primarily acetone. The photocatalyst is BiVO4, ZnO, or a modified photocatalyst based on morphology control, surface modification, semiconductor composite, or elemental doping of BiVO4 or ZnO. This invention uses methane and water as raw materials, reacting with a photocatalyst in a gas-solid two-phase reaction to produce a liquid oxygen-containing organic compound, primarily acetone, with high acetone yield and selectivity. This invention has advantages such as low requirements for the reaction environment, simple and environmentally friendly process, and low cost.

The application discloses a collagen microsphere reaction device and an application method thereof, and is based on the cooperation of structural members provided with through hole arrays to form a series type focusing through hole array, solves the problems of high integration difficulty and complex operation of pipeline microfluidic technology; the series type focusing through hole array can realize instant mixing and emulsification of a collagen solution and a crosslinking agent into a ball, solves the problem of solution flowability change caused by solution solidification in advance due to pre-mixing of the crosslinking agent; in addition, multiple containers adopt homologous driving force, and monodisperse collagen microspheres are synchronously generated in the focusing through hole array, so that standardized batch production of the collagen microspheres can be realized, the difficulty of large difference between batches in the traditional method is solved, the collagen microsphere preparation can be conveniently and efficiently realized, and the application can be widely applied to the technical field of microsphere synthesis.

The invention relates to the technical field of gas mixing, and discloses a helium-oxygen mixed gas manufacturing device and method.The helium-oxygen mixed gas manufacturing device for breathing comprises a tank body, an inner cylinder, a helium guiding-in piece, an oxygen guiding-in piece, a drainage channel and a flow control assembly.The helium guiding-in piece and the oxygen guiding-in piece are used for guiding helium and oxygen correspondingly; according to the helium-oxygen mixed gas preparation device, helium and oxygen are primarily mixed in the first-stage mixing cavity in a large range under the control of the flow control assembly on intermittent opening and closing of a channel opening of the drainage channel, the primarily-mixed helium-oxygen mixed gas gradually enters the second-stage mixing cavity, mixing is further completed, manufacturing of the helium-oxygen mixed gas is achieved, and the production efficiency of the helium-oxygen mixed gas is improved. The mixing effect is improved, and the quality of helium-oxygen mixed gas is guaranteed.

A novel PRP manufacturing set comprises a blood drawing tube, a PRP sampling tube and a common syringe, the outer wall of the blood drawing tube is fixedly connected with a 40ml scale line, the outer wall of the PRP sampling tube is fixedly connected with a 20ml scale line, and the front end of the blood drawing tube is provided with a butt joint tube structure. According to the novel PRP manufacturing set, the first piston head at the front end can be pushed through the detachable push rod to be pulled and slide in the blood drawing tube, the first piston head can drive the interior of the blood drawing tube to achieve blood drawing, blood feeding and PRP manufacturing through being communicated with the PRP sampling tube through negative pressure, the PRP sampling tube is designed to be of a short and thick structure, the maximum capacity is 20 ml, the short and thick design is adopted, the head can be clamped, and the PRP sampling tube is convenient to use. According to the novel PRP manufacturing set, blood drawing operation does not need to be completed, blood can be quantitatively conveyed into the PRP sampling tube through a long injector structure and a short injector structure, the PRP manufacturing process can be more accurately and reasonably achieved, and the using effect of the novel PRP manufacturing set is improved.

The application provides a polarization volume holographic grating, a preparation method of the polarization volume holographic grating and an exposure system, and the polarization volume holographic grating comprises a substrate layer, a two-dimensional orientation layer and a liquid crystal layer; the two-dimensional orientation layer is arranged on the surface of the substrate layer, the orientation direction of the two-dimensional orientation layer periodically changes in a first preset direction and periodically changes in a second preset direction perpendicular to the first preset direction, so that the two-dimensional orientation layer forms first and second equal phase lines with an included angle greater than zero; the liquid crystal layer is arranged on the surface of the two-dimensional orientation layer away from the substrate layer, the arrangement direction of the liquid crystal molecules in the liquid crystal layer corresponds to the orientation direction of the two-dimensional orientation layer, so that the liquid crystal layer forms a first equal phase surface corresponding to the first equal phase line and a second equal phase surface corresponding to the second equal phase line. The application orients the liquid crystal layer through the two-dimensional orientation layer, so that the polarization volume holographic grating has the diffraction characteristics of a two-dimensional grating, and the preparation of a single-layer two-dimensional polarization volume holographic grating is realized.

This invention relates to a mesoporous platinum@platinum-nickel core-shell framework nanowire and its preparation method, comprising the following steps: (1) uniformly mixing platinum precursor, nickel precursor, structure directing agent, and reducing agent with a first solvent, and performing a hydrothermal reaction to obtain Pt@Pt-Ni core-shell nanowires; (2) uniformly mixing the Pt@Pt-Ni core-shell nanowires with a second solvent and acetic acid, and performing an etching reaction to obtain etched mesoporous platinum@platinum-nickel core-shell framework nanowires. This invention employs a hydrothermal method, which is simple, reproducible, and allows for batch production with safety. Compared with traditional commercial platinum-carbon catalysts, the catalytic activity is greatly improved, the stability is greatly enhanced, and the production cost is reduced.

This invention discloses a method for preparing high-temperature resistant polyimide foam material, comprising: preparing a foamable precursor powder using aromatic dianhydride and diamine; performing bilayer extrusion and foaming molding using two single-screw extruders, wherein one extruder extrudes and foams the foamable precursor powder, and the other extrudes fiber-reinforced thermoplastic resin; the two are compounded at a co-extrusion die, and shaped by a shaping die to obtain a polyimide foam composite material with a fiber-reinforced resin layer on the surface; cutting and collecting polyimide foam strips or foam particles of equal length, filling them into a die, and then hot-pressing to obtain the polyimide foam composite material. This invention significantly improves the operability of polyimide foam preparation and simplifies subsequent molding processes. This invention also provides a high-temperature resistant polyimide foam material obtained by the above preparation method, which can simultaneously provide high compressive strength, high modulus, and low density, and is easy to scale up for production.

The invention discloses a preparation method and application of a superhard surface with martensite phase transformation induced through heat-force synergism, and belongs to the technical field of laser surface machining. According to the core process, continuous laser is used for heating the metal surface to the temperature above the phase transformation point, a large number of lattice defects such as dislocation and stacking faults are introduced into the surface layer of the material through the in-situ composite pulse laser shock technology, then more martensite phase transformation is induced through air cooling, and therefore the surface hardening layer high in hardness and large in depth is obtained. According to the method, more driving force is provided for martensite phase transformation through the heat-force synergistic effect, and the method can be used for manufacturing super-hard surfaces of stainless steel and titanium alloy materials.

The application discloses a molybdenum nitride film and a preparation method and a vacuum interconnection system thereof, and the preparation method comprises the following steps: providing a substrate; and growing a molybdenum nitride film on the substrate through an ultrahigh vacuum chemical vapor deposition process, wherein the crystal phase of the molybdenum nitride film is delta-MoN, and the vacuum degree in the growth process of the molybdenum nitride film is not higher than 3*10 ‑10 Mbar, and the substrate temperature is 850 DEG C to 1000 DEG C. The ultrahigh vacuum chemical vapor deposition process is adopted, and the growth parameters in the growth process of the molybdenum nitride film are controlled, so that the preparation of the molybdenum nitride film with a pure delta-MoN crystal phase is realized.

The present invention discloses a flexible tactile sensor unit based on annular spiral fibers and a preparation method thereof, comprising a base layer, a support layer, a tactile sensing layer and an electrode layer, wherein the support layer covers the base layer; the tactile sensing layer comprises X×Y annular spiral fiber units distributed on the support layer; the electrode layer is arranged on the support layer and is used as a signal output lead to connect the X×Y annular spiral fiber units. The flexible tactile sensor unit based on annular spiral sensitive fibers of the present invention has a large degree of design freedom, and array blocks of different sizes and sizes can be designed according to needs. At the same time, the structural surfaces of different regular and irregular carriers are arranged and assembled into a splicable array structure, which can be expanded into different types of tactile sensing arrays and has stronger portability.

The invention relates to a gas dispersing and heating device and equipment and a method for continuously preparing carbon nanotube in-situ modified glass fibers, the gas dispersing and heating device can directly guide gas into a heating furnace through a gas diffuser, so that the atmosphere of a heating area is stable, and the reaction is stable. According to the equipment for continuously preparing the carbon nanotube in-situ modified glass fiber, two processes of glass fiber surface catalyst layer arrangement and carbon nanotube in-situ growth which are greatly different can be integrated into one set of equipment, and the matching of the processes and the equipment is realized, so that the continuous preparation of the carbon nanotube in-situ modified glass fiber can be realized, and the continuous preparation of the carbon nanotube in-situ modified glass fiber is realized. According to the method, continuous efficient modification of the carbon nanotubes on the glass fibers can be realized, the production efficiency can be greatly improved, the growth consistency and controllability of the carbon nanotubes can be ensured, and industrial preparation of the carbon nanotube in-situ modified glass fibers is facilitated, so that the method is more practical.