53 results about "Particle suspension" patented technology

This case relates to a self-healing optical film and its preparation method. The optical film is made by adding a nanoparticle suspension to PET masterbatch as the main material during its melt extrusion process, resulting in a cast sheet. After biaxial stretching, a self-healing coating liquid is coated online, followed by shaping and cooling. The nanoparticle suspension includes nano-titanium oxide, MAH-PET polymer, ATO nanoparticles, and titanate coupling agent. The self-healing coating liquid is produced by core-shell emulsion polymerization, forming a nano-silica hard core and an acrylate functional monomer polymer soft shell. This invention adds the nanoparticle suspension by in-situ feeding in the middle of the extruder, reducing steps, improving dispersion uniformity, and making the film surface smoother. Then, the self-healing coating liquid is applied online after longitudinal stretching and before transverse stretching, forming a film on the film surface, improving the hardness and scratch resistance of the film material, enabling rapid self-healing at room temperature, strong stability, and avoiding the occurrence of rainbow patterns.

In some aspects, the present disclosure pertains to a method of forming radiopaque crosslinked hydrogel particles comprising (a) mixing a reactive multi-arm polymer comprising a plurality of cyclic imide ester groups, a reactive multifunctional compound comprising a plurality of amino groups, and a radiocontrast agent under conditions in which a pH environment surrounding the reactive multi-arm polymer, the reactive multifunctional compound and the radiocontrast agent increases from an acidic pH to a basic pH, thereby forming a radiopaque hydrogel and (b) subjecting the hydrogel to a particle size reduction process, thereby forming the radiopaque crosslinked hydrogel particles. Other aspects of the present disclosure pertain to radiopaque crosslinked hydrogel particles formed from such methods, suspensions of such radiopaque crosslinked hydrogel particles, and medical supplies that contain such radiopaque crosslinked hydrogel particles.

The invention provides a preparation method of silver-coated copper powder, and belongs to the technical field of metal powder treatment. The used copper particle suspension contains a complexing agent, so that the activity of the copper particles can be reduced, the reaction rate of reduction coating can be reduced when a silver-ammonia complexing solution is added, and a compact silver layer slowly and uniformly grows on the surface of each copper particle; the reduction of the activity of the copper particles slows down the replacement reaction of silver ions and copper, and the situation that the coating surface is rough and loose due to the generation of overlarge silver particles is avoided; the silver grows slowly and compactly, so that the surface of the coated silver layer is smooth and compact on the basis of lower usage amount of the silver source; the preparation method is simple in process, low in silver content and low in production cost, and the coated silver layer is smooth and compact in surface.

The invention discloses an ultrasonic abrasive flow surface texture machining device and method based on an auxiliary magnetic field, and belongs to the field of precision machining and surface engineering. The ultrasonic abrasive flow surface texture machining device comprises a workbench, an ultrasonic vibration generating device, a magnetic field generating device, an abrasive flow machining system and a three-dimensional motion platform. The composite abrasive particle suspension is composed of a basic solution, carbonyl iron powder magnetic particles and silicon carbide abrasive particles. According to the method, magnetic particles are guided by a magnetic field to form a chain along magnetic lines of force, ultrasonic high-frequency impact is combined, abrasive materials are driven to impact the surface of a workpiece in order, a submicron texture with the consistent direction and the uniform size is formed, the depth ranges from 0.2 micrometer to 2 micrometers, and the width ranges from 1 micrometer to 20 micrometers. Texture parameters are flexibly regulated and controlled through magnetic field and ultrasonic parameters, and the method has the advantages of being high in machining precision, high in controllability, low in cost, environmentally friendly and recyclable, is suitable for precise parts of bearings and cutters, and can remarkably improve the tribological performance and wettability of the parts.

The invention discloses a method for measuring the molar concentration of nano-particles. The method comprises the following steps: diluting a nano-particle suspension with a high-molecular polymer solution or dispersing nano-particle powder into the high-molecular polymer solution; transferring the suspension liquid to a spacing net on the side of a sample pool in an electrophoresis tank; nano-particles migrate from the sample pool to the buffer pool under the driving of the electric field and are uniformly distributed on the spacing net in a single-particle manner; performing single-particle imaging on the spacing net by using an optical microscope; and counting the number of the nanoparticles in the image so as to measure the molar concentration of the nanoparticles in the sample. The method can be used under the condition that the properties of the nanoparticles are unknown or no standard substance exists, the detection object has no additional condition, and the accuracy is high.

The invention relates to the field of preparation of modified double-base propellants, in particular to a preparation process of a modified double-base propellant absorbing drug with uniformly dispersed solid components. The preparation process comprises the following steps: putting the dispersing agent into an absorption kettle according to a feeding sequence, then putting a particle suspension prepared from the white material, the RDX, the aluminum powder and the catalyst into the absorption kettle, and heating, stirring and absorbing in a water medium to obtain absorption slurry. On the basis of a traditional double-base propellant stirring absorption process, a dispersing agent is added to help absorption, the sedimentation problem of a catalyst and RDX in a propellant formula is effectively solved through the effects of electrostatic repulsion and steric hindrance, and an absorption drug with uniformly dispersed solid components is obtained.

This invention relates to a particle-polymer aggregate composite oil displacement agent and its application. The oil displacement agent of this invention comprises: (A) a particle suspension containing particles and water, wherein the mass fraction of the particles is 200-2000 ppm; and (B) a polymer solution containing a polymer and water, wherein the mass fraction of the polymer is 0.01-10 ppm, and the polymer is one of the following: (B1), (B2), or (B3): (B1) an ionic polymer, wherein the ionic polymer is a cationic or anionic polymer, wherein the charge of the ionic groups on the polymer molecular chain is opposite to the charge of the particle surface; (B2) a mixture of cationic and anionic polymers; (B3) a naturally aged nonionic polymer. The oil displacement agent of this invention is low in cost, easy to inject, has a high sealing effect, and good oil displacement effect.

The invention relates to a solid fuel combustion characteristic test technology, and aims to provide a focusing single particle suspension variable atmosphere ignition combustion experiment device and method. A second microporous plate and a feed hopper are arranged at the top of a combustion chamber main body of the device, and a first microporous plate and a gas buffer cavity are arranged at the bottom; the two laser emitters are arranged in an included angle shape, and the energy of a single laser beam is lower than a fuel particle ignition threshold value; the two paths of laser intersect in the central area of the cavity to form a space energy focus, and the superposed energy of the two beams of laser can be absorbed at the position to reach an ignition threshold value; and light paths of diagnosis equipment in the optical acquisition module are intersected in a focus area. According to the invention, through a strategy of airflow disturbance and microwell plate blocking, particles completely move in airflow; the ignition behavior has spatial selectivity, the success rate is high and controllable, and the research is closer to the actual application scene. Through the design of single-particle fixed-point triggering, the system complexity and the control difficulty can be reduced, and the operation stability and the experiment repeatability can be improved.

The application provides a preparation method of a porous material loaded with mixed microorganisms, comprising the following steps: S1, preparation of a mixed bacteria suspension; S2, preparation of an activated sludge porous material; and S3, preparation of a porous material loaded with mixed microorganisms. The application also provides a preparation method of an oil-wetting and water-repellent activated sludge porous material loaded with microorganisms, which comprises spraying a hydrophobic silica particle suspension on the porous material loaded with mixed microorganisms to obtain a modified material which is oil-wetting and water-repellent. The porous material loaded with mixed microorganisms and the oil-wetting and water-repellent activated sludge porous material loaded with microorganisms can effectively degrade medium and long chain alkanes in oil, especially n-hexadecane.

The invention belongs to the field of nano-films, and particularly relates to a preparation method and application of a high-stability super-hydrophobic SiO2 antireflection film, and the preparation method comprises the following steps: obtaining a hollow SiO2 nano-particle suspension, modifying and dispersing a ZSM-5 molecular sieve, preparing composite sol, etching and modifying, and preparing, coating and modifying the sol with low surface energy. According to the invention, the design of a molecular sieve in-situ embedded composite structure is used for reference, and a hollow SiO2 modification process is combined, so that the synergistic improvement of the anti-reflection performance, the super-hydrophobic performance and the structural stability is realized.

The invention provides a laser projection observation device, and relates to the technical field of suspended particle projection. A laser beam emitted by a laser device is combined with a particle suspension technology realized by a suspension device, and an amplification module is introduced to amplify particle scattered light to form a dynamic real-time image on a projection curtain, so that the problem that in the prior art, no lossless and non-contact in-situ real-time observation on suspended particles is available is solved; the objective of providing a clear, large-size and real-time dynamic observation effect is achieved.

The invention discloses a particle patterning control device and method based on a multi-mode sound field in a capillary tube. Comprising the steps that particle suspension liquid is injected into a capillary tube, a piezoelectric transducer is arranged on the outer side of the capillary tube, and the piezoelectric transducer is acoustically coupled with the outer surface of the capillary tube; applying an electric signal to the piezoelectric transducer, using the piezoelectric transducer to excite the two-dimensional acoustic resonance mode of the capillary tube, so that a corresponding bulk acoustic wave field is generated in the capillary tube, and the particles in the capillary tube are distributed according to the sound field gradient of the bulk acoustic wave field to form a particle pattern; and manipulating the particle pattern by modulating the excitation frequency or the structure of the capillary. According to the device and the method disclosed by the invention, various complex and stable particle aggregation patterns including circles, ellipses, other high-order modes and the like can be formed in the capillary tube.

The invention provides a method for strengthening migration and arrangement of metal type nano particles in an aquifer medium. Comprising the following steps: constructing a mesoporous silica coating layer on the surface of a metal type nano particle, then dispersing the metal type nano particle in water, and performing dispersion treatment to obtain a particle suspension; and injecting the particle turbid liquid into the aquifer medium to be treated, so that the nano particles are migrated and dispersed into pore channels of the aquifer medium. The metal nanoparticles are coated with the mesoporous silica, and the coating layer is used as a physical barrier, so that particle aggregation is effectively inhibited, and long-time stable dispersion of the metal nanoparticles in a system is ensured; meanwhile, contact with porous media is reduced, and the migration performance is remarkably improved. In addition, the mesoporous structure on the coating layer can expose active sites of the inner core metal type nanoparticles, so that the material is endowed with reaction capacity. According to the method, the catalytic function is reserved while long-distance migration of the metal type nanoparticles is achieved, and the mesoporous silica is environmentally friendly and free of secondary pollution risks.

The invention belongs to the technical field of chemical equipment monitoring and control, and particularly relates to a method for detecting the suspension effect of particles in a stirring reactor, which comprises the following steps: preparing fluorescent beads with different sizes; liquid is injected into the stirring reactor, all the fluorescent beads are put into the liquid, and the liquid is stirred through a stirrer; the stirring reactor is irradiated by an ultraviolet lamp, so that the fluorescent beads in the stirring reactor emit fluorescence; a real-time monitoring module is adopted to collect images of the small fluorescent balls in the stirring reactor; analyzing the fluorescent ball image to obtain a motion track, an instantaneous rate and a direction of the fluorescent ball; obtaining the suspension effect of the particles in the liquid according to the motion trail, the instantaneous rate and the direction of the small fluorescent balls; through the high-speed camera and the intelligent image processing module, the particle suspension state can be captured in real time, and the detection efficiency is remarkably improved.

The invention discloses an oily graphene anti-corrosion coating as well as a preparation method and application thereof, and belongs to the crossing field of anti-corrosion coatings and nano material dispersion technologies. The oily graphene anticorrosive paint comprises the following raw materials in percentage by mass: 20%-70% of an oily resin matrix, 0.1%-3% of graphene, 5%-25% of a dispersing agent, 15%-40% of a solvent and 5%-60% of a curing agent, wherein the oleoresin matrix is one of bisphenol A epoxy resin, fluorocarbon resin and phenolic resin. The graphene slurry prepared by the invention has super-long storage stability; the room-temperature storage period of the slurry is more than or equal to 30 days (particle suspension rate gt; and the salt spray resistance life of the modified coating is more than or equal to 4900 hours, and is obviously prolonged compared with that of the traditional oil paint (3000 hours). Modifying a coating charge transfer resistance (Rct) gt; and 6.0 * 10 < 8 > omega.cm < 2 >. The coating realizes double breakthrough in cost and environmental protection property: the addition amount of graphene is 0.1%-3%, and VOC emission is controlled to be 50-80 g / L. The coating can be applied to protection of energy infrastructures, ocean engineering and heavy equipment, industrial building structures and the like.

Provided herein are pharmaceutical compositions, intravitreal implants and particle suspensions comprising a polymer matrix and at least one therapeutic agent that is released in a substantially linear manner for a particular duration.

This invention relates to the field of jelly production technology, specifically to a process for producing whole-fruit pulp jelly, comprising the following steps: cooking the liquid; preparation: preparation is carried out when the liquid temperature drops to 85℃-87℃, with soluble solids controlled at 16.0±0.5% and pH value between 3.8 and 4.1; filling: filling is completed within 60 minutes after preparation, with the liquid temperature at the filling machine outlet not lower than 75℃, and fruit pulp-containing contents are added during the process. This invention pre-coats whole fruit pulp (such as lychee) with a pH-sensitive colloid, such as low-methoxyl pectin, before filling. After filling, the local pH value on the surface of the whole fruit pulp drops to 3.3-3.5. Combined with the diffusion and migration of calcium ions in the liquid, this triggers the pH-sensitive colloid, such as low-methoxyl pectin, to produce a pre-gel, which significantly reduces the interfacial voids between the fruit pulp and the jelly gel body, improving the standardization of the fruit particle suspension position.

The invention relates to a particle suspension shear rheological prediction method based on pressure control, and the method comprises the steps: S1, obtaining reference data, constructing a simulation model, and verifying the simulation model; s2, different grading samples are constructed, multi-working-condition coupling simulation is carried out, mu-Iv data is obtained, preprocessing and unified sampling are carried out, and an original data set is established; s3, constructing and training a random forest shear rheological prediction model, performing hyper-parameter optimization, and performing forward prediction to output a mu-Iv curve; s4, an Iv partition rheological model is established and verified, a target working condition demand and constraint condition input module is constructed, a reverse solution module of target reverse design is constructed based on the forward prediction model in the S3, grading optimization is carried out, and a comprehensive optimal solution scheme is output; and S5, an output result in the S4 is substituted back to the CFD-DEM coupling simulation model for verification, closed-loop correction is carried out, and a traceable data file is formed. According to the method, a fine particle / coarse particle addition amount or proportion adjustment amount grading optimization scheme is output.

The application belongs to the field of ecological water treatment, and relates to a ferrous sulfide particle reinforced subsurface flow constructed wetland and application thereof. A ferrous sulfide particle suspension is added to the subsurface flow constructed wetland by using a reverse circulation injection method; the reverse circulation injection method comprises the following steps: a. injection from the water outlet of the subsurface flow constructed wetland; b. collection and discharge of the effluent from the water inlet of the subsurface flow constructed wetland, and re-injection of the effluent into the water outlet of the subsurface flow constructed wetland; wherein the b process is at least circulated once; the ratio of the particle size of the filler in the subsurface flow constructed wetland to the particle size of the ferrous sulfide particles is 1-10:1-100, cm:nm. The application can effectively introduce the ferrous sulfide particles into the subsurface flow constructed wetland, thereby effectively reinforcing the simultaneous reduction of heavy metals and nitrate nitrogen in the subsurface flow constructed wetland, so that the application can be used for treating industrial wastewater, mining wastewater, tail water of a sewage treatment plant and the like, and controlling the ecological environment health hazards caused by combined wastewater pollution of heavy metals and nitrate nitrogen.

The utility model relates to the technical field of water-based resin processing, in particular to a secondary dispersing device for water-based resin. The device comprises a main dispersing tank, and a primary dispersing mechanism is fixedly mounted on the back surface of the main dispersing tank; and a conveying belt is fixedly mounted on the top surface of the main dispersing tank. According to the secondary dispersing device for the water-based resin, the water-based resin is put into the main dispersing tank and is communicated with an external power supply, a first servo motor drives a primary dispersing rod to rotate, a water-based resin raw material is primarily dispersed, and a conveying belt drives a scraping plate to rotate; scraping the particle suspension floating above the main dispersion tank into a secondary dispersion tank for secondary dispersion; a second servo motor drives a stirring frame and a crushing rod to rotate, the crushing rod shears and crushes particles in the particle suspension, and the stirring frame performs secondary stirring and mixing, so that the effect of secondary dispersion of the water-based resin is achieved, the uniformity of resin particles can be remarkably improved, and the performance of a final product is improved.

The invention discloses a neutron absorption grating manufacturing method and a neutron absorption grating thereof, and the manufacturing method comprises the following steps: S1, pre-preparation: carrying out the etching on a substrate according to a preset pattern, forming a periodic accommodation structure, and carrying out the cleaning and drying; s2, preparing an absorbing material particle suspension: adding a volatile solvent and a surfactant into the high-neutron absorption coefficient material particles, and performing ultrasonic dispersion to obtain the absorbing material particle suspension; s3, ultrasonic-assisted filling: under vacuum, covering the absorbing material particle suspension on the surface of the periodic accommodating structure, keeping a certain liquid level height, and carrying out ultrasonic treatment and standing; and S4, post-treatment is conducted, specifically, surface cleaning is conducted on the periodic containing structure. According to the invention, particle filling is carried out by using the particle suspension with strong fluidity and an ultrasonic-assisted filling mode, so that the accommodating structure is compactly filled with the material particles with high neutron absorption coefficients, and the high-quality neutron absorption grating is obtained; the preparation method is simple to operate and low in cost.

The invention discloses a silver sheet magnetic-assisted 4D printing method capable of turning, and belongs to the technical field of thermal management materials. The defects that in the prior art, a thermal interface material filler is single in orientation mode and cannot meet diversified heat dissipation requirements, and a high-performance material preparation process is complex are overcome. The preparation method comprises the following steps: 1, preparing silver suspension; 2, preparing a nano magnetic particle suspension; 3, adding the nano magnetic particle suspension into the silver suspension, stirring and incubating; 4, filtering; 5, preparing light-cured silver paste; and 6, exposing and curing in a constant magnetic field. The magnetic-assisted 4D printing device is used for magnetic-assisted 4D printing of the silver sheets capable of being turned.

This invention provides a countercurrent particle suspension reactor, belonging to the field of chemical reactor technology. It includes a reaction body zone, a feeding zone, and a receiving zone. Particles enter the reaction body zone from the feeding zone, moving downwards. Airflow enters the reaction body zone from the receiving zone, moving upwards. Within the reaction body zone, the particles and airflow form a countercurrent, slowing the particle descent and allowing them to participate in the reaction. After the reaction, the particles enter the receiving zone for collection. By using countercurrent flow, the residence time of particles in the reaction body zone is extended, avoiding backmixing, agglomeration, and other undesirable behaviors within the reactor. This reactor can be used for both solid and liquid particles. The countercurrent particle suspension reactor provided by this invention solves the problems of short particle residence time and undesirable behaviors such as backmixing, agglomeration, and coalescence within the reactor in existing technologies.

The invention discloses a semiconductor chip chemical grinding fluid supply method, and aims to improve the stability and accuracy of grinding fluid preparation and supply. Comprising the following steps: respectively storing grinding fluid components including a grinding particle suspension, a chemical additive and the like; performing multi-stage filtration on the grinding particle suspension through a precision filtration system to form a filtration suspension with preset particle distribution; accurately mixing the filtered suspension, the chemical additive solution and the diluent according to a preset proportion by adopting a dynamic mixing device to form a chemical grinding fluid; and the grinding liquid is supplied to the semiconductor chip grinding equipment through the dynamic fluid control system, so that the stability of the grinding process is ensured. The method solves the problems of purity, uniformity and supply stability of the grinding fluid through step-by-step storage, multi-stage filtration and dynamic mixing, and is suitable for manufacturing of high-precision semiconductors.

Provided herein are pharmaceutical compositions, intravitreal implants and particle suspensions comprising a polymer matrix and at least one therapeutic agent that is released in a substantially linear manner for a particular duration.

The application discloses an experimental device and experimental method for studying the disturbance of particle suspension caused by cleaning behavior, relates to the technical field of building environment, intelligent control and airflow solution model, and comprises a conveying device, a reciprocating cleaning device, a material supply device, a power unit, a control system, a data recording system and a storage system. The application can complete the experimental research on the disturbance of particle suspension caused by the cleaning behavior of particles through a simple control system, and can satisfy the experimental scheme requirements under various working conditions by programming the control system and replacing the reciprocating cleaning device, thereby providing convenience for the experimental research on the disturbance of particle suspension caused by the cleaning behavior. In addition, the application can automatically control after the experimental working condition and parameters are determined, thereby effectively reducing the workload of manual operation while ensuring the experimental efficiency and accuracy.

The invention discloses an alpha-Al2O3 nano-particle high-precision particle size grading method based on a four-layer non-equidistant density gradient solution and a collaborative sedimentation mechanism, which comprises the following steps: S1, carrying out surface dispersion treatment on alpha-Al2O3 nano-particles to form a uniform particle suspension with the mass fraction of 0.1-0.2 wt%; and S2, constructing four layers of non-equidistant density gradient liquid: sequentially and slowly injecting solvents with different densities into the centrifugal tube from bottom to top. According to the method, a four-layer non-equidistant density gradient liquid system is constructed, and a multi-stage differential sedimentation interface is formed in the centrifugation process, so that alpha-Al2O3 nanoparticles in different particle size sections obtain a relatively clear migration path, the mixing crossing probability of particles with approximate particle sizes at the interface is reduced, and the definition of a hierarchical structure is improved.

The invention belongs to the field of particle suspension evaporation, and relates to a particle suspension evaporation method and system based on a vibration substrate. According to the method, particle suspension liquid drops are deposited on a vibration substrate, and the substrate is driven to generate periodic vibration with specific frequency and amplitude, so that the liquid drops enter a resonance state. Under the resonance condition, complex convection is formed in the liquid drops, single circulation driven by evaporation is broken, the trend that particles continuously migrate to the edge is remarkably weakened, and therefore the coffee ring effect is effectively restrained. Compared with the prior art, the method has the advantages that the structure is simple, the operation is convenient, uniform deposition of particles can be realized without adding a surfactant or special surface modification, and the method has good universality and wide application prospect, and is suitable for the fields of biological detection, ink-jet printing, functional coating, micro-nano device manufacturing and the like.