75 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.

The invention relates to the technical field of geological exploration, in particular to a deep water ultra-shallow natural gas reservoir rock physical shear wave velocity prediction method, which comprises the following steps: calculating the equivalent bulk modulus, shear modulus and density of a mixed matrix of various minerals according to the shale content; calculating the bulk modulus and the shear modulus of the skeleton; calculating the bulk modulus and the shear modulus of the saturated rock through the model, and calculating the density of the saturated rock through the density of the rock matrix; distributing longitudinal and transverse velocities in a suspension state and a bearing state, and calculating equivalent longitudinal and transverse wave velocities; taking the longitudinal wave velocity as a known condition, and constructing an inversion objective function by using the equivalent longitudinal wave velocity; comparing the actual longitudinal wave speed with the calculated longitudinal wave speed; and realizing nonlinear inversion of the shear wave velocity according to an algorithm, and obtaining the shear wave velocity of the work area to be inverted. According to the method, rock physical models in a particle suspension state and a bearing state are considered at the same time, and shear wave velocity prediction and direct inversion of the shear wave velocity of the deepwater ultra-shallow natural gas reservoir are realized.

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 relates to a preparation method of a water-in-water nanocellulose Pickering emulsion with uniform and controllable size, which comprises the following steps: S1, preparing an aqueous two-phase system, and respectively preparing a water-based continuous phase and a dispersed phase of a water-soluble polymer with compatible type, concentration and molecular weight; s2, preparing an aqueous continuous phase suspension containing 5%-8% of cellulose nanocrystal (CNC) particles; s3, assembling a micro-channel device which comprises a two-water-phase two-channel angle-designable feeding pipe, a length-dependent composite pipe for regulating and controlling the size of a dispersed phase, a lead-in pipe for introducing the particle suspension and the composite pipe according to a set angle, and a spiral pipe for forcibly assembling and optimizing particles on a two-phase interface and adaptively regulating and controlling the length / screw pitch / diameter; s4, preparing a water-in-water emulsion with stable CNC particles; according to the method, two-water-phase compounding and particle interface assembling are strengthened through micro-channel design, the flow speed and the air pressure interruption time are regulated and controlled, accurate control over the emulsion size and the droplet distance is achieved, and the common problems that the emulsion size is not uniform and the particle coverage degree is not high are solved.

The invention discloses a soil particle directional deposition sample preparation method based on magnetic / electric field regulation and control, which comprises the following steps: mixing soil particles with a functional medium which is a magnetic nanoparticle dispersion liquid or a charged surfactant solution; enabling the surfaces of the soil particles to adsorb a functional medium through ultrasound or stirring to form temporarily magnetized or charged modified particles; injecting the modified particle suspension into a deposition tank, applying a magnetic field or an electric field, and regulating the long axis direction of the modified particles to a target angle; capturing a particle deposition image in real time through a monitoring system, processing the particle deposition image and calculating a particle deposition direction by utilizing an intelligent image analysis module, and feeding back and adjusting parameters of a magnetic field or an electric field according to a processing result of the intelligent image analysis module; and after deposition is completed, removing the external field to obtain the sample with the controllable deposition angle. The method can be used for accurately preparing soil particle directional deposition samples with different deposition angles, and is simple and convenient to operate and good in repeatability.

The application provides a low-crystallinity hydroxyapatite microsphere for implantation and a preparation method thereof, and the preparation method comprises the following steps: preparing a mixed solution of a calcium source reagent and a phosphorus source reagent, adding inorganic acid, alkali and a buffer into the mixed solution, adding a surfactant, and obtaining a hydroxyapatite micro-particle precipitate through constant-temperature reaction; cleaning the hydroxyapatite micro-particle precipitate, and preparing a hydroxyapatite micro-particle suspension by adding water; and performing spray drying on the hydroxyapatite micro-particle suspension to obtain the hydroxyapatite microsphere; wherein the surfactant is one or more of PEG and PVP. The hydroxyapatite microsphere obtained by the application has stable structure, belongs to spherical large particles, is easy to inject, and is not prone to agglomeration; when the hydroxyapatite microsphere is injected into a human body, the hydroxyapatite microsphere has good supporting effect; and the preparation method of the application is simple, has few process steps, and is easy to realize reaction conditions, and is suitable for large-scale production.

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 belongs to the technical field of biomedical materials, and discloses light-controlled liquefied hydrogel for inhibiting wound scar formation and a preparation method and application thereof.The light-controlled liquefied hydrogel is prepared from 6-18 parts of PVA hydrogel, 3-9 parts of borax boric acid buffer solution and 1-3 parts of PDA (at) CeO2-SAB nano-particle suspension.The hydrogel has the advantages that light-controlled liquefaction can be achieved, and the hydrogel can be applied to wound scar formation. The material has the characteristics of uniform particle size, accurate drug release, inhibition of CD36 expression, good biocompatibility, biodegradability and the like, can be used for infected wounds, and provides a novel, simple and effective material for wound inflammation inhibition and scar repair resistance treatment.

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 present invention relates to a syringe comprising: a syringe barrel having an open proximal end leading into an interior, the interior having a cylindrical wall and an angled distal surface terminating in an outlet; a plunger rod; and a plunger seal, a proximal end of the plunger seal configured to be attached to a distal end of the plunger rod, and a distal end of the plunger seal configured to be inserted through the open proximal end into the interior of the syringe barrel, the plunger seal forms a seal with the cylindrical wall of the interior of the syringe barrel, and the distal end of the plunger seal terminates at an angled distal surface, wherein the angled distal surface of the syringe barrel is sharper than the angled distal surface of the plunger seal. The invention also relates to a kit comprising such a syringe.

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 microstructure preparation equipment and a microstructure preparation method. The microstructure preparation method comprises the following steps: providing a container filled with a particle suspension and a base material with a hydrophilic interface; placing the provided substrate at least partially in the particle suspension in the container; and evaporating the particle suspension in the container to deposit suspended particles in the particle suspension on the hydrophilic interface of the substrate so as to form a target microstructure on the surface of the substrate. In one embodiment, at least a portion of a substrate having a hydrophilic interface is placed into a particle suspension in a container by preparing the particle suspension. Then, the particle suspension liquid in the container is evaporated, so that the needed target microstructure is generated on the hydrophilic interface of the base material, and the deposition time can be adjusted to control the height of the deposited microstructure. Therefore, by adopting the manufacturing method for the target microstructure, the production process of the target microstructure is relatively simple, and the cost is low.

The application discloses a preparation method of a long-acting interface lubricating coating, which comprises the following steps: (1) adding 5-7 mass parts of nano sol, 4-6 mass parts of micrometer porous powder, 1.0-1.2 mass parts of low surface energy substance and 4-6 mass parts of ammonia water into 80-120 mass parts of ethanol, stirring under water bath heating condition, obtaining modified micrometer particle suspension, drying the suspension into powder at high temperature, and obtaining modified porous powder; (2) fully mixing 0.8-1.2 mass parts of the modified porous powder with 3-5 mass parts of silicone oil, putting into a vacuum pump to vacuumize, enabling the silicone oil to enter the modified porous powder, separating the excess silicone oil after the vacuum state is removed, and obtaining the porous powder containing silicone oil; (3) carrying out hole sealing treatment on the porous powder containing silicone oil, mixing the porous powder with silicone oil after high-temperature drying, and obtaining a mixed solution of the hole sealing powder and the silicone oil; (4) adding 2.5-4 mass parts of resin into 2-5 mass parts of diluent, then adding 0.5-0.6 mass parts of silane coupling agent, then adding 0.5-0.8 mass parts of the mixed solution of step (3), finally adding 0.75-1.2 mass parts of curing agent, uniformly mixing, brushing or spraying onto a substrate, and air-drying to obtain the interface lubricating coating.

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.