374results about How to "Uniform particle size" patented technology

The invention discloses a material for rapid three dimensional printing forming and a preparation method thereof. The material comprises a modifying powder material A and bonding agent B, wherein preparation method of the modifying powder material A comprises the following steps: adding powder material and a first solvent into a ball mill or grinding mill, and milling to obtain a pretreated powder material; adding surfactant, lubricant and organic resin into a second solvent in sequence, and stirring and dispersing for 2-3 hours to obtain modifying solution; mixing the pretreated powder material and the modifying solution, adding into the grinding mill, mixing and milling at normal temperature, drying, grinding, and pulverizing to obtain the modifying powder material A. When in use, one weight part of the modifying powder material A and 0.01-0.07 weight parts of the bonding agent B are blended. The material provided by the invention is used as the raw material for a rapid three dimensional printing forming machine, and can be used for effective rapid forming on different types of three dimensional printing machines.

The invention discloses a hollow core-shell nanometer mesoporous medicament carrying system with magnetism and luminescent performance. In the medicament carrying system, a magnetic Fe3O4 hollow capsule is used as an inner core, mesoporous SiO2 is used as a shell layer, and an organic luminescent material and a biocompatible polymer are modified on the outer surface of the shell layer. A preparation method of the medicament carrying system comprises the following steps of: firstly, preparing monodisperse fusiform beta-FeOOH nanoparticles by a hydro-thermal method, coating mesoporous silicon dioxide on the surfaces of the nanoparticles, removing a pore-forming agent through thermal treatment, and simultaneously, converting the inner core into alpha-Fe2O3 from the beta-FeOOH, so that a cavity is generated in the inner core so as to form a hollow nanometer capsule structure; secondly, converting the inner core into the magnetic Fe3O4 hollow capsule through reduction treatment; and finally, modifying the organic luminescent material and the biocompatible polymer on the surface of the magnetic mesoporous nanometer capsule. The nanometer composite capsule of the invention has the advantages of core-shell structure and cavity structure, uniform particle size, high biocompatibility and excellent magnetism.

The invention relates to the manufacturing field of nano composite emulsion materials, in particular to graft nano zinc oxide/polyacrylate composite emulsion and a manufacturing method thereof. Firstly an initiator azobisisovaleric acid is anchored on the surface of nano zinc oxide particles, two portions of hexadecane are added to 100 portions of mixed monomers, and 5 portions of nano ZnO particles anchoring the azo initiator are added and ultrasonically oscillated for 20 minutes to form an oil phase pre-dispersion solution. The pre-dispersion solution is added to an emulsifier aqueous solution and dispersed by a high-shear dispersion homogenizer at high speed for 30 minutes to form a mini-emulsion. The mini-emulsion is transferred to a reactor, heated to the temperature of 75 DEG C, with polyreaction initiated for 3 hours, and then heated to the temperature of 85 DEG C, polymerized for 2 hours, cooled to room temperature and discharged. The invention solves the problems of high cost and poor stability of the nano composite emulsion prepared by coupling agents, and low encapsulation efficiency and graft ratio of nano polymer composite particles. The composite emulsion has the advantages of simple preparation process, low cost, even particle size, good performance, high encapsulation efficiency and graft ratio of the nano-particles, forms nano monodisperse state in the polymer, and is suitable for the fields of coating materials, leather finishing materials, adhesives and functional plastics.

The invention discloses a device for preparing superfine spherical metal powder for 3D printing. The device comprises a shell, a crucible disposed in the shell and a powder collecting area. The device is characterized in that the crucible is of an inner-outer-embedded ring structure, the bottom of the inner accommodating cavity of the crucible and the bottom of the outer accommodating cavity of the crucible are provided with central holes which are communicated, space allowing molten metal to flow is arranged between the bottom of the inner accommodating cavity and the bottom of the outer accommodating cavity, a pressing piece is disposed above the central hole of the inner accommodating cavity, and a transmission rod contacts with the pressing piece; the power collecting area comprises a collecting plate disposed at the bottom of the shell and a rotary disc which is disposed above the collecting plate, connected with a motor and used for atomizing metal power particles. The invention further discloses a method for preparing the superfine spherical metal powder. The method mainly combines a pulse micro-pore injection method and a centrifugal atomizing method. By the method and the device, the superfine spherical metal powder which is narrow in particle size distribution interval, high in sphericity, good in flowability and spreading property and high in production efficiency, and the superfine spherical metal powder conforms to the application requirements of 3D printing.

The invention belongs to the field of luminescent materials, and discloses an electroluminescent material and a preparation method thereof. The electroluminescent material has a genera chemical formula of N1-xR2O4:xLn, zM, wherein N is one or two of Zn, Ca, Sr and Ba; R is one or two of Al and Ga; Ln is one or two of Tm<3+>, Tb<3+>, Eu<3+>, Sm<3+>, Ce<3+> and Dy<3+>; M is one or two of Ag, Au, Pt and Pd metal particles; and x is more than or equal to 0.0001 and less than or equal to 0.2, and z is more than 0 and less than or equal to 1*10<-2>. For the electroluminescent material provided by the invention, by means of introducing the metal particles and using a surface plasma resonance effect generated on metal surfaces, the luminous intensity can be increased by 60 percent; meanwhile, the preparation method is simple in operation, is easy and pollution-free, is easy to control, and facilitates industrial production.

The invention discloses a lithium/carbon pyrophosphate coated lithium iron phosphate composite and a preparation method thereof. The preparation method comprises the steps of preparing Li2O coated lithium iron phosphate, and obtaining the lithium/carbon pyrophosphate coated lithium iron phosphate composite through in-situ solid phase reaction of excessive LiO2 and excessive phosphor salt. Smooth-faced lithium iron phosphate is prepared by the fluxing action of Li2O in a first sintering process, a certain phosphorus source and a carbon source are added in a second mixing process, the added phosphorus source reacts with excessive Li2O in a second sintering process to produce lithium pyrophosphate, and finally the lithium/carbon pyrophosphate coated lithium iron/carbon phosphate composite is prepared. Lithium pyrophosphate is a vitreous fast ionic conductor, and can greatly improve power performances of lithium iron phosphate.

The invention discloses a preparation method of CaCu3Ti4O12 (CCTO) ceramic, and the method can be used for solving the technical problem of high dielectric loss caused by the existing preparation method of the CaCu3Ti4O12 ceramic. The technical scheme of the invention is as follows: a casting technology is adopted to prepare a CCTO ceramic wafer, then a two-step sintering technology is adopted to obtain a ceramic material with dense structure and uniform particle size; and according to the changes of the dielectric constant epsilon r and dielectric loss tan delta of the CCTO ceramic along with the testing frequency and the temperature, CCTO crystalline integrity, grain boundary, defect and other aspects can directly influence the high dielectric constant. In addition, at the room temperature and 1KHz, when the sintering temperature is 1025-1100 DEG C and heat preservation is performed for 10 hours, the epsilon r of the CCTO ceramic prepared through two-step sintering is 104, which is more or less the same with the value reported in literatures; and the dielectric loss is reduced from 0.3-0.6 reported in the background art to 0.03, which shows that the concentration of oxygen vacancies can be reduced by adopting the two-step sintering method. Therefore, the high-temperature low-frequency dissipation of the ceramic can be significantly reduced; and the lattice distortions can be reduced along with the increase of the heat preservation time.

The invention discloses a GPS-based unmanned aerial vehicle variable-rate spraying control device and method. The device comprises a flight control subsystem, a sensing acquisition subsystem, a flow control subsystem and a power supply module. The sensing acquisition subsystem is connected with the flight control subsystem and the flow control subsystem separately. The power supply module supplies power for the flight control subsystem, the sensing acquisition subsystem and the flow control subsystem. The method is implemented in a way that the flow values corresponding to flight speeds are taken as the given values through an integral separation PID control strategy, then a single chip microcomputer outputs corresponding PWM signals to change the rotation speeds of a diaphragm pump, and thus the flows are changed; and the PID control strategy refers to that the flows of nozzles are detected by flow sensors, the process variables and the set values are constantly compared, and the flow of the pump is constantly corrected and controlled, so as to improve the control precision. The PWM technology is adopted to adjust the diaphragm pump, to realize the control that the flows change along with the speeds, and an intelligent variable-rate spraying control system high in efficiency, good in stability and low in cost is formed.

The invention discloses a metal/graphene catalyst and preparation method thereof. The mass percent of the metal is 1-30%, the mass ratio of the metal salt and the graphene is (0.1-100):100, the mass ratio of the organic amine and metal salt is (50-500):1, the metal salt and graphene are added in the organic amine to ultrasonically disperse for 5-300 minutes, the dispersed solution is stirred and heated to 100-300 DEG.C after reacting for 0.5-24 hours, the solution is filtered, washed and dried to obtain the metal/graphene catalyst. The metal/graphene catalyst is simple in preparation method and controllable in metal particle size.

The invention discloses halogen-free flame-retardant temperature controlled microcapsules and a preparation method thereof. Each halogen-free flame-retardant temperature controlled microcapsule consists of a core material and a wall material, wherein the core material refers to liquid paraffin, the wall material refers to inorganic material silica, and the mass ratio of the wall material silica to the core material liquid paraffin is (1-3):1. The preparation method comprises the following steps: mixing, stirring and dissolving liquid paraffin, an emulsifier and distilled water, thereby obtaining emulsion; mixing ethyl orthosilicate, absolute ethyl alcohol and distilled water, regulating the pH value to 3-4, thereby obtaining silica-containing sol; adding the emulsion into the silica-containing sol, continuously stirring at a constant temperature for 2-3 hours, regulating the pH value to 5-6, aging at room temperature for 24 hours, stirring the obtained gel, performing suction filtration, washing, drying, thereby obtaining the halogen-free flame-retardant temperature controlled microcapsules. The halogen-free flame-retardant temperature controlled microcapsules have natural flame-retardant characteristic, and the formed microcapsules are uniform in granularity and have high conductivity and thermal stability.

A preparing method of a monodisperse phenolic resin carbon microbead is provided. The method includes following steps of: forming water-in-oil phenolic resin liquid drops in a micro-channel reactor by a microfluidic liquid drop technique; preparing the phenolic resin liquid drops into phenolic resin microbeads by thermocuring; washing and separating the phenolic resin microbeads to obtain a monodisperse phenolic resin microbead; and subjecting the monodisperse phenolic resin microbead to high-temperature carbonization in an inert atmosphere to form the monodisperse phenolic resin carbon microbead. The method overcomes the defects in the prior art, namely complex processes, difficulty in accurate control of product particle sizes, irregular morphology, and the like, and has advantages of simple and rapid preparation process, controllable microbead particle size, uniform particle size, good degrees of sphericity, and the like.

The invention relates to a method for preparation of a polyvinyl alcohol embolism microball by synchronous solidification, the method is based on hydrodynamic principle, in a micro-scale channel, a polyvinyl alcohol aqueous solution, crosslinking agent aqueous solution and catalyst aqueous solution mixed fluid is used as a discrete phase fluid, an organic solvent which is not mutually soluble with water is used as a continuous phase fluid, the discrete phase fluid is divided into a nano-liter scale discrete phase and droplets smaller than nano-liter scale at the two fluid intersection position by shear force and/or extrusion force of the continuous phase fluid and fluid interfacial tension interaction, the droplets are solidified into solid particles by synchronous crosslinking, and the solid particles are washed and dried into the polyvinyl alcohol embolism microball. The polyvinyl alcohol embolism microball prepared by the method is uniform in particle size, size-controllable, and good in degree of sphericity.

The invention relates to a method for preparing a sandwich Co-Al-hydroxide composite metal oxide (Co-Al-LDH) electrode material of super capacitor, belonging to the technical field of preparing the electrode material of super capacitor. The invention uses an all-returning mixed solution film reactor to make coprecipitation reaction on Co-Al mixed salt solution and basic solution, making nucleation/crystallization separation, controlling the nucleating and growing conditions of the crystal, respectively, then baking at a certain temperature, and fully exposing the electrochemical active situ of the Co on the basis of keeping the sandwich of Co-Al-LDH. The prepared Co-Al-LDH has the advantages of high specific capacitance, good multiplication property, and excellent electrochemical circulating performance.

The invention relates to cotton, wood and bamboo composite pulp phase-change microcapsule viscose and a preparation method thereof, belonging to the viscose field. The phase-change microcapsule comprises 80-250 parts of methyl methacrylate, 80-150 parts of phase change paraffin, 2.5-6 parts of an emulsifying agent, 0.5-1.5 parts of azo initiator, and 300-400 parts of deionized water. According to the invention, cotton, wood and bamboo composite pulp is used for preparing spun-viscose for producing the cotton, wood and bamboo composite pulp phase-change microcapsule viscose, and steps such as alkali steeping, aging, yellowing, dissolving and the like during the viscose production process are optimized. The microcapsule disclosed by the invention has a uniform grain size, is suitable for producing composite viscose and capable of remarkably improving the quality of the viscose and the spinnability with small influence; moreover, the prepared viscose not only has a natural moisturizing and ventilating effect of composite bamboo pulp fiber, but also has the function of accumulating heat and adjusting temperature.

The invention relates to a preparation method for a petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth, and belongs to the technical field of nanometer material production. The preparation method comprises the steps of mixing ethanol, deionized water, ammonia water, tetraethyl orthosilicate, resorcinol and formaldehyde for reaction; drying a solid phase and performing calcination in argon; etching the solid phase with a sodium hydroxide solution to obtain the solid phase, and drying the solid phase to obtain the hollow mesoporous carbon nanometer sphere; mixingsodium molybdate dihydrate, thiourea and the hollow mesoporous carbon nanometer sphere for hydrothermal reaction, performing centrifugal washing after hydrothermal reaction, drying the solid phase, and performing high-temperature calcination under protection of argon atmosphere to obtain the petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth. The preparation method has the advantages that the raw material is low in cost, the process is environmental-friendly, high yield is achieved, and the prepared petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth can be used as a lithium ion battery electrode material, a photocatalytic material or an electrocatalytic material.

The invention discloses a dual-shell phase change stored energy micro-capsule and a preparation method thereof. The method includes steps of heating and dissolving alkane to core solution, and then adding core solution to solution of cyanate ester and anionic emulsifier; after ultrasonic emulsification, dropwise adding diamine and forming micro-capsule water solution packed by polyuria; mixing and stirring a certain matching ratio of methyl methacrylate, butyl acrylate, compound emulsifier and de-ionized water to form prepolymer; and then adding the prepolymer to the micro-capsule water solution packed by polyurial; stirring and heating for a certain time, cooling; and then filtering and washing by a Buchner funnel; at last, vacuum-drying and obtaining the dual-shell phase change stored energy micro-capsule. The prepared n-alkane core material is completely packed by diamine and multifunctional cyanate ester used as an inner shell and polyacrylic resin used as an outer shell; the formed micro-capsule is free from poison, uniform in grain diameter, smooth in surface, and free from agglomeration.

The present invention provides a preparation method of composite silica microparticles with monodispersity, comprising the steps of: (a) adding at least one precursor selected from a titania precursor and an alumina precursor, and a silica precursor to a solvent, which are hydrolyzed to form composite silica microparticles; (b) drying and calcining the composite silica microparticles; and (c) hydrophobically treating the calcined composite silica microparticles.

The invention discloses a nitrogen-doped carbon quantum dot with high fluorescence quantum yield and a preparation method and an application of the nitrogen-doped carbon quantum dot. The carbon quantum dot is obtained by the following steps: mixing a nitrogen-containing carbon source, a surface-modified molecule and high-boiling point alcohol, and fully reacting in an inert protective atmosphere at 200-240 DEG C. The prepared carbon quantum dot has the characteristics of uniform particle size (mainly distributed at 2-4nm), high nitrogen content (can be up to 10wt%), high fluorescence quantum efficiency (can be up to 20%), low cytotoxicity and the like, and can be widely applied to the fields such as cell imaging and living imaging; synthesis and surface modification are finished in one step; and the nitrogen-doped carbon quantum dot is simple in process and low in cost, can be produced in a macro scale, and can fully meet the requirements of industrialized application.

The invention discloses an analysis and detection method of surface enhanced Raman of benzo (a) pyrene. The method comprises the following steps that: firstly, gold nanoparticles are synthesized in a solution phase, are decorated by thiol and automatically assemble to form a large-area gold nanoparticle film in a gas/liquid interface, the large-area gold nanoparticle film is transferred to a silicon wafer to serve as an SERS (Surface Enhanced Raman Scattering) substrate, and the hydrophobic carbon chain end of the thiol can capture benzo (a) pyrene molecules to locate the benzo (a) pyrene molecules in the effective range of a plasma resonance magnetic field of the gold nanoparticles so as to analyze and detect the surface enhanced Raman of the benzo (a) pyrene. The particle diameters of the synthesized gold nanoparticles are uniformly distributed, the structure of a single layer of nanoparticles assembled in the gas/liquid interface is regular and orderly, and the nanoparticles can realize quantitative analysis on the benzo (a) pyrene if being taken as the SERS substrate. The method is simple in substrate preparation, short in sample analysis time and capable of realizing on-line detection through portable Raman, and the substrate can be reused.

The invention discloses an organic modified nanometer complex oxide material and a preparation method thereof. The SiO2 microsphere is taken as a substrate, an inorganic metal oxide is embedded in the bulk phase of the SiO2 microsphere and an organic group is connected to the surface of the inorganic metal oxide; the organic modified nanometer complex oxide material is expressed in a general formula MeOg-SiO2, wherein Me is short for Metal, and Og is short for Organicgroup; and Me is one or more of Co, Mn, Cu, Fe, V, Ti, Cr, Ni, Zn, Zr and Al and Og is one or more of methyl, ethyl, propyl, vinyl, chloroallyl, naphthyl, phenyl, trifluoropropyl, fluorophenyl and pentafluorophenyl. The operational process is simple and easy to control. Since the metallic ion and the organic group are respectively introduced on the bulk phase and the surface of the SiO2 simultaneously, the invention has the broad prospect on the application aspects of nano-devices and functional material.

The invention discloses a method for preparing a lithium-rich manganese-based layered lithium battery cathode material based on an efficient solid-phase chemical complexation reaction. The method comprises the following steps: firstly preparing a lithium source, a nickel source and a manganese source which are used as raw materials and preparing a solid ligand complexing agent; dry-blending the prepared raw materials and the solid ligand complexing agent according to a certain molar ratio based on stoichiometric ratio of metallic elements in a molecular formula of the target product lithium-rich manganese-based layered lithium battery cathode material which is to be prepared, and fully grinding; drying mixed materials obtained at low temperature to obtain a solid-phase complexing agent precursor; and sintering the solid-phase complexing agent precursor in the air or in an oxygen-enriched atmosphere, so as to obtain the lithium-rich manganese-based layered lithium battery cathode material. The method provided by the invention is simple and easy to control, is green and environmentally friendly, and has advantages of low production cost, high production efficiency and excellent product performance.

The invention discloses a method for preparing porous one-dimensional nanometer cobaltosic oxide. The method comprises: a, synthetic step: at the room temperature, bivalent cobalt salt is mixed with a solution of urea, and the obtained mixed solution is heated up to a temperature of between 80 and 120 DEG C for reaction for 0.5 to 12 hours; b, filter-washing step: the synthetic solid product is filtered, washed and dried to obtain the dried cobalt hydroxide with nanometer structure; and c, calcination step: the product obtained by the filter-washing step is heated at a temperature of between 200 and 400 DEG C for 1 to 2 hours, and cooled down to the room temperature. Compared with the prior art, the method has the advantages that: the nanometer powder is uniform in size and good in dispersibility and cleanliness; only the cobalt source is used as a precursor, so that a crystal seed is unnecessarily added; the yield is high, the cost is low, the process flow is short, and the cobaltosic oxide prepared by the method has quite high specific surface area, and when the cobaltosic oxide is applied to the lithium ion battery, the performance of the battery can be greatly improved.

The invention relates to the field of biomedicine, particularly to a polyethylene glycol modified Bi nano photothermal conversion material as well as a preparation method and an application thereof, and aims to solve problems that photothermal conversion performance, photothermal stability and biosecurity of existing developed inorganic photothermal conversion materials (such as gold nano-rods, gold nano-shells, carbon nano-tubes, Cu9S5 nanocrystals and the like) need to be improved and synthetic processes are relatively complex. The particle size of the polyethylene glycol modified Bi nano photothermal conversion material is 20-200 nm, and the photothermal conversion efficiency of the polyethylene glycol modified Bi nano photothermal conversion material is 25%-35%. The method comprises steps as follows: I, a Bi nanoparticle material is prepared; II, the Bi nanoparticle material is coated. The polyethylene glycol modified Bi nano photothermal conversion material as a photothermal conversion nanomaterial is used for photothermal therapy of malignant tumors.

The invention discloses a peony seed oil microcapsule and a preparation method of the peony seed oil microcapsule, and belongs to the technical field of food engineering. The peony seed oil microcapsule comprises a core material phase and a wall material phase. Through being metered by weight parts, the core material phase consists of 10 to 60 parts of peony seed oil and 0.5 to 5 parts of oil soluble emulsifiers; the wall material phase consists of 20 to 75 parts of wall materials, 5 to 50 parts of wall material connecting auxiliary agents, 20 to 150 parts of water, 1 to 8 parts of water-soluble emulsifiers and 0.5 to 5 parts of stabilizers. The pressure emulsification homogenizing is used, so that the particle diameter of an emulsion reaches the nanometer level, so that the particle size of an obtained product is uniform; the reconstitution capacity is good; the solubleness is good; the peony seed oil microcapsule can be dissolved in cold water; no precipitate and no floating object exist in a solution; no floating oil exists after the still standing for 48 hours; the solution can be compounded with other emulsions such as milk; the application range of the peony seed oil is expanded. The peony seed oil microcapsule and the preparation method have the advantages that the process is simple; the production cost is low; the product stability is greatly improved; and the nutrition activity of the peony seed oil is maintained.

The invention discloses a preparation method of a direct methanol fuel cell anode catalyst, and belongs to the technical field of electrocatalysis and energy. The method comprises the following steps: firstly preparing polyethyleneimine (PEI) functionalized graphene, then mixing H2PtCl6, CuCl2 and PEI functionalized graphene according to a certain mass ratio, dispersing in secondary water by ultrasonic, performing in-situ reduction of H2PtCl6 and CuCl2 by sodium borohydride under a room temperature condition so as to prepare a PtCu two-component nanoparticle/graphene catalyst (PtCu/graphene). The PtCu two-component nanoparticles (PtCuNPs) prepared by the method of the invention are uniformly dispersed on PEI functionalized graphene, and the particle size of the PtCu alloy nanoparticles is about 4-6 nm. Electrochemical experiment results show that the PtCu/graphene catalyst has excellent electrocatalytic activity for methanol oxidation; and the method is simple in operation, is mild and controllable in experiment conditions, and has extensive application prospects.

The invention discloses a mesoporous polydopamine liquid-state fluorine-carbon-entrapped ultrasonic contrast medium and a preparation method thereof. Through a template method, dopamine hydrochloride,a block copolymer F-127 and 1,3,5-trimethylbenzene are used as basic raw materials for preparing liquid-state fluorine-carbon-entrapped mesoporous polydopamine solution (the MPDA ultrasonic contrastmedium) with different particle diameters. The prepared mesoporous polydopamine (MPDA) has good biocompatibility and a mesoporous structure, liquid-state fluorine-carbon can enter a mesoporous pore channel, and under heating and irradiation of an ultrasonic wave, bubbles are generated to reinforce the ultrasonic contrast effect. The ultrasonic contrast medium is controllable in particle diameter,and simple in preparation method, expected to be further applied for tumor diagnosis and treatment integration after synergistically wrapped with a drug, and has a high research value and extensive application prospect.

The invention discloses a colorful ink powder prepared by adopting miniemulsion polymerization and a method thereof. A core-shell compound emulsion particle of a resin coated pigment, wax and a charge agent is prepared by adopting a miniemulsion polymerization method and has a particle diameter of 50-100nm, then a colored ink powder particle which has a particle diameter of 50-10 mu m is prepared through an electrolyte agglomeration compounding method, and the colorful ink powder is prepared through steps of separating, washing, drying, adding and the like. According to the colorful ink powder, the pigment and the wax are packaged by adopting the resin, thus the leakage problem of the pigment and the wax is effectively solved. The prepared colorful ink powder has the advantages of controllable particle diameter, narrower distribution, uniform dispersing of components and the like and the morphology of the particles is regular.

The invention discloses a solid phase synthesis method of a silver and chitosan and/or chitosan derivative nanometer compound. The silver and chitosan and/or chitosan derivative nanometer compound has the effects of promoting wound healing, stopping bleeding, relieving pain, diminishing inflammation and killing bacteria. The silver and chitosan and/or chitosan derivative nanometer compound can beutilized for treating female colpitis, cervicitis, cervical erosion, bedsore, skin ulcers, burns, scalds, wounds, other skin inflammation, tinea manus and tinea pedis. The silver and chitosan and/or chitosan derivative nanometer compound also can be utilized for preparation of various wound dressings such as films, sponges, suppositories for gynaecology, and adhesive films.

The invention relates to a clear oral preparation with coenzyme Q10 and a preparation method thereof, belonging to the food additive technical field. The oral preparation comprises the following raw materials by weight percent: 0.1%-10% of coenzyme Q10, 0.5%-30% of emulsifier, 5-20% of co-emulsifier, 0.5%-10% of stabilizer and the balance water. The preparation process comprises the following steps: weighting the raw materials according to the formula, firstly dissolving coenzyme Q10 in emulsifier and co-emulsifier, adding the obtained mixture in a stabilizer aqueous solution to form a uniform mixed solution, and finally preparing a finished solution through high speed shearing. The invention has the advantages that the technology does not use organic solvent, the desired devices are simple, clear and uniform nanometer disperse system with coenzyme Q10 can be prepared, the system has good dispersibility, the bioavailability can be improved, and the coenzyme Q10 aqueous solution can bestored stably for over one year.

The invention provides a method for preparing a hydrogel micro-solution storage device and multi-phase heterogenous microparticles on the basis of microfluidic double-emulsion-phase droplet technique. A microfluidic chip mainly comprises a microfluidic body with micro-channels and a sealing substrate. The method includes that oil-in-water-in-oil (o/w/o) double-emulsion-phase micro-droplets are formed in the micro-channels of the microfluidic chip at first, and the double-emulsion-phase micro-droplets are polymerized into the micro-solution storage device structure containing a hydrogel shell and oil core content via photo-initiation technology; and oil cores can be slowly separated from the hydrogel shell to form the multi-phase heterogenous microparticles after the micro-solution storage device is placed under a certain dry condition.