86results about How to "Particle Size Control" patented technology

The invention discloses a class of fluorescent nanoparticles and a preparation method and an application thereof. The fluorescent nanoparticle comprises matrix material and fluorescent dye dispersed in the matrix material, wherein the matrix material is the compound composed of hydrophobic polymer main chain of which is hydrocarbon chain, organo-siloxane and organosilicon-polymer, and the fluorescent dye is rare earth complex with photoluminescence performance. The preparation method of the fluorescent nanoparticle comprises the following steps: dissolving rare earth complex, hydrophobic polymer and compound RSi (OR') 3 into organic solvent miscible with water; adding the mixture into aqueous solution containing surfactant; using precipitation and hydrolytic condensation reaction to form nanoparticles. The nanoparticle of the invention has favourable luminous performance and favourable stability, can have a silicon oxide shell and a surface functional group and can be used for bondingbiomolecules; biological probes based on the fluorescent nanoparticle have wide application prospects on the aspects of high-sensitivity fluorescence immunoassay, imaging and the like.

The invention discloses a cuprous oxide nanocrystalline with adjustable morphology and dimension as well as a preparation method and an application thereof. The preparation method comprises the following steps: copper hydroxide which is used as a precursor is synthesized; the pH value of the system is regulated; the system whose pH value is regulated is reduced in order to obtain cuprous oxide nanocrystalline. A surfactant is not needed to add, the cuprous oxide nanocrystalline with specific morphology and dimension can be obtained by adjusting the pH value of the reaction system, and the nanocrystalline can be used for photocatalytic degradation of organic pollutants, and the method is a rapid, simple and green preparation method of cuprous oxide nanocrystalline.

The invention discloses a preparation method for a buffering layer material of a copper indium gallium selenide film solar battery. By the method, a precursor of chemical bath reaction is prepared by using a zinc sulfate solution as a Zn<2+> source, a thiourea solution as a S<2-> source, ammonia water as a buffering agent and sodium citrate as a complexing agent; and a Zn(O,S) semiconductor film with uniform and compact grain size distribution and good adhesive force is prepared on a copper indium gallium selenide film and the common glass substrate and serves as the buffering layer of the copper indium gallium selenide film solar battery. The Zn(O,S) instead of CdS serves as the buffering layer of the copper indium gallium selenide film solar battery, so production of the copper indium gallium selenide film solar battery is environment-friendly and economic. The band gap width of the Zn(O,S) is more than that of the CdS, so more incident photons can reach an absorption layer through the buffering layer, short-circuit current of the battery is increased and photoelectric conversion efficiency of the battery is improved.

The invention discloses a preparation method of the MOF-metal nanoparticle-COF composite material. The method comprises the following steps: dispersing MOF into a solution containing a metal ion precursor, adding a sodium borohydride solution or performing illumination reduction, or performing hydrogen reduction after centrifugation to obtain the MOF-metal nanoparticle composite material. Activating at a high temperature of 120-150 DEG C and then dispersing in 1, 3-butanediol; the method comprises the following steps: adding 1, 4-dioxane and mesitylene into a mixed solvent of 1, 4-dioxane andmesitylene; then adding a small amount of aldehyde group organic ligand and ultrasonically and uniformly mixing; subsequent addition of acetic acid, adding a corresponding amount of amino organic ligand, and continuously stirring for a period of time to obtain an MOF-metal nanoparticle-COF seed crystal compound; and adding an aldehyde group organic ligand and an amino group organic ligand, uniformly stirring and mixing, adding a corresponding amount of acetic acid, and continuously stirring, heating and preserving heat to obtain the MOF-metal nanoparticle-COF compound. Covalent binding of thetwo materials is achieved through a Schiff base reaction between aldehyde groups on the surfaces of the seed crystals and amino groups on the surfaces of the MOF materials, the binding force is stableand firm, the preparation method is simple, the method can be used for mass production, and traditional high-temperature and high-pressure reaction conditions are not needed in the compounding process.

The invention provides a method for efficiently concentrating cobalt and nickel from a low-grade nickeliferous laterite ore. The method is based on mine-phase reconstruction, and the ore is subject to physical treatment, high temperature chlorination and reduction roasting to convert the nickel and the cobalt in the ore from oxide or composite oxide (silicate and ferrite) mineral into magnetic metal or alloy, magnetic separation method or combined floatation-magnetic separation method is used for separation to concentrate the cobalt and the nickel. The method is used for treating the low-grade nickeliferous laterite ore (Ni is 0.2-2.0%), contents of the nickel ore concentrate is more than ten times of that of the crude nickel ore; and the nickel recovery is more than 80%.

The invention provides a positive material for a lithium ion battery and a preparation method thereof. The method comprises the following steps of: providing nano lithium phosphate with a hollow structure; mixing the nano lithium phosphate, a soluble manganese source compound and an additive with a mixed solvent of water and polyhydric alcohol; carrying out ball milling to obtain a mixed solution; then keeping heat of the mixed solution in a closed reaction kettle filled with inert gas under the condition that the temperature is 150-230 DEG C to obtain lithium phosphate; mixing the lithium phosphate with a carbon source compound and carrying out the ball milling; and calcining to obtain the positive material for the lithium ion battery of carbon coated lithium phosphate. According to the positive material and the preparation method thereof disclosed by the invention, polyhydric alcohol-hydrothermal reaction between a solid and liquid can be carried out on the lithium phosphate and the soluble manganese source compound, so that the grain diameter of a lithium phosphate crystal is effectively reduced and a crystal form of the lithium phosphate crystal is integrally formed; and furthermore, the positive material for the lithium ion battery with high specific capacity and specific energy can be obtained and is good for popularization. The invention further provides the lithium ion battery.

The invention discloses a method for preparing TiO2 nanocrystal particles, which comprises the following steps: dispersing titanic acid nanotubes in an oxydol water solution, and carrying out hydrothermal reaction to obtain monodisperse high-photocatalytic-activity anatase TiO2 nanocrystal particles. The process for preparing the titanic acid nanotubes comprises the following steps: mixing a titanium source and a sodium hydroxide water solution, carrying out hydrothermal reaction to obtain sodium titanate nanotubes, and carrying out acid exchange on the sodium titanate nanotubes to obtain the titanic acid nanotubes; or mixing a titanium source and a potassium hydroxide water solution, carrying out hydrothermal reaction to obtain potassium titanate nanotubes, and carrying out acid exchange on the potassium titanate nanotubes to obtain titanic acid nanotubes; or carrying out anode oxidation on metal titanium in a fluorion-containing electrolyte to obtain the titanic acid nanotubes.

The present invention relates to the technical field of nanometer selenium hydrosols, particularly to a nanometer selenium hydrosol having antitumor activity, a preparation method, a preservation method and applications thereof, wherein the hydrosol at least contains nanometer selenium with a concentration of 0.5-5.0 mmol / L, and Coriolus versicolor polysaccharide protein with a concentration of 100.0-600.0 mg / L. The preparation method at least comprises: S01, adding a solution containing selenium ions and / or selenous ions to a Coriolus versicolor polysaccharide protein aqueous solution; S02, adding a reducing agent solution to the mixed solution obtained in the step S01 in a dropwise manner, and shaking; and S03, carrying out volume metering on the product obtained after the reducing reaction, and carrying out dialysis treatment. According to the present invention, the hydrosol is stable at a temperature of 2-10 DEG C; and the Coriolus versicolor polysaccharide protein has the hydrophilic hydroxyl and the hydrophilic amino, and the two groups can enhance the affinity between the nanometer selenium and the cancer cells, and can improve the uptake on the nanometer selenium by tumor cells so as to achieve the whole treatment effect of medication dosage reducing, treatment effect improving and less toxic-side effect, such that the effective scheme is provided for the combination chemotherapy of cancers in the clinic.

The invention relates to a high-strength temporary blocking agent for oil and gas wells and a preparation method and application thereof. The temporary blocking agent for oil and gas wells is prepared from the following ingredients through crosslinking reaction: thickening agent, dispersing agent, adhesive and a temperature resistant material with mass ratio of (2.5-3):(1.3-2):(2.8-3):(1.7-2), preferentially, 3:2:3:2. The temporary blocking agent for oil and gas wells has the advantages of high strength, filter cake formation, good solubility and controllable time, flowback is facilitated and the method is simple to operate.

The invention discloses a preparation method of a high-activity molybdenum disulfide (MoS2) hydrogenation catalyst. The method comprises the following steps: dissolving or dispersing a certain amountof molybdenum source and reductive sulfur source in a high-viscosity solution, and adding a reducing agent to obtain a solution or turbid liquid; regulating and controlling the types of the molybdenumsource, the sulfur source and a solvent; putting the prepared solution or turbid liquid into a closed stainless steel reaction kettle, and controlling the reaction temperature to be 120-220 DEG C andthe reaction time to be 3-72 hours; and after the reaction is finished, cooling, separating, washing and drying to obtain the high-activity MoS2 hydrogenation catalyst. The synthesis method disclosedby the invention has the advantages of low temperature, low pressure, no need of adding an additional reducing agent and the like, and the prepared MoS2 hydrogenation catalyst has the advantages thatthe interlayer spacing is enlarged, the accumulation degree is less than 3 layers, and the lamellar length is shorter than 10nm, so that the highest hydrogenation active site exposure rate is achieved. The high-activity exposed nano MoS2 hydrogenation catalyst synthesized by the method disclosed by the invention has extremely high catalytic hydrogenation activity in the field of catalytic hydrogenation of oil products.

The invention discloses a nanocomposite catalyst for an ethane oxidative dehydrogenation reaction and a preparing method thereof. According to the method, firstly, an M1 purity-phase compound in a vanadium molybdenum niobium tellurium multielement metal oxide system is obtained through hydro-thermal synthesis and hydrogen peroxide purification processing; then, cerium oxide sol with the mass fraction of CeO2 being 5-30% is prepared; two methods, namely the sol-gel method and the physical mixing method are adopted, and the M1 purity-phase compound in the vanadium molybdenum niobium tellurium multielement metal oxide system and a finished product of cerium oxide nanometer complex catalyst are obtained. According to the prepared nanocomposite catalyst, the surface of rod-shaped crystal of the M1 purity-phase compound is evenly provided with a great mount of CeO2 nanometer particles, and the grain diameter of the CeO2 ranges from 2 nm to 30 nm. The nanocomposite catalyst has higher catalytic activity and selectivity in the ethane oxidative dehydrogenation reaction process, and meanwhile the synthesizing cost of the vanadium molybdenum niobium tellurium multielement metal oxide system can be lowered through the introduction of the CeO2.

The invention provides a preparation method of metal powder and alloy powder. The preparation method comprises the following steps that powder of an oxide or a mixture of several oxides or a pressed piece is composited with a metal current collector to be served as a cathode, graphite is served as an anode, molten alkaline earth metal halide with excessive alkaline earth metal oxides or alkali halide with excessive alkali metal oxides or a mixture of the molten alkaline earth metal halide and the alkali halide is served as an electrolyte, in a protective atmosphere, electrolysis is performed for 1-5 hours with the electrolysis temperature being 400-900 DEG C and the electrolysis voltage being 1.4-3.2 V, a product is taken out after being cooled to the normal temperature, then the product is washed in distilled water, dilute acid or an organic solvent, and the metal powder or alloy powder is obtained after the product is subjected to vacuum drying. According to the preparation method of the metal powder and alloy powder, the particle size is controllable, and thus the metal powder and alloy powder are directly prepared.

The invention discloses a graphene-silicon dioxide composite wall-material phase-change nanocapsule and a preparation method thereof. A core material of the phase-change nanocapsule is a paraffin phase-change material, a wall material of the phase-change nanocapsule is a graphene-silicon dioxide composite material, and the particle size of the nanocapsule is nanometer scale. The preparation methodcomprises the following steps: mixing the phase-change material with an alkoxy silane compound so as to obtain an oil phase, adding a cationic surfactant and a water / ethanol mixed solvent, and carrying out high-speed shearing and ultrasonic refining so as to obtain an oil-in-water type fine emulsion; dispersing graphene into deionized water under the assistance of an anionic surfactant so as to form stable graphene dispersion liquid; and dropwise adding the graphene dispersion liquid into the fine emulsion, sequentially adding ethanol and a basic catalyst, heating to react, filtering, washing, and drying, so as to obtain a black powder product. The wall material of the phase-change nanocapsule is the graphene-silicon dioxide composite material, so that a supercooling phenomenon of the phase-change nanocapsule can be eliminated, and meanwhile, the heat conductivity coefficient and heat stability of the phase-change nanocapsule can be increased.

The invention relates to a SiOx-C composite negative electrode material with a core-shell structure and a preparation method thereof. The composite negative electrode material comprises a conductive core M, a SiOx layer and a carbonaceous shell; the surface of the conductive core M is coated with SiOx gas in an in-situ deposition mode to form a core-shell structure of the conductive core M@SiOx layer; the surface of the core-shell structure is coated with a carbon source precursor through a pyrolytic reaction to form the carbonaceous shell; the preparation method comprises the following stepsof placing the conductive core in a furnace with inert gas protection; introducing the SiOx gas into the furnace to deposit on the surface of the conductive core to form the M@SiOx core-shell structure; and carrying out uniform mixing on the core-shell structure and the carbon source precursor and then performing the pyrolysis reaction to obtain the M@SiOx-C composite negative electrode material with the core-shell structure. The SiOx-C composite negative electrode material with the core-shell structure prepared in the invention has the advantages of high conductivity, high first coulombic efficiency and high cycling stability. The preparation method is simple in process flow, easy to control, low in synthesis cost and suitable for large-scale production.

The invention discloses an efficient pulverizer for ceramic production. The efficient pulverizer for ceramic production comprises a first pulverizing cavity, a pulverizing roller and a hydraulic cylinder, wherein the outer wall of the first pulverizing cavity is covered with an electric heating layer, the upper side of the first pulverizing cavity is connected with a feeding funnel, a first rotary shaft is vertically arranged at the axis position of the inside of the first pulverizing cavity, screw blades are evenly arranged on the outer wall of the first rotary shaft, an air outlet pipe is horizontally arranged at the left end of the outer wall of the lower side of the first pulverizing cavity, and the left end of the air outlet pipe is connected with an exhaust fan. The efficient pulverizer for ceramic production integrates material pulverizing and drying functions, ensures the quality of processed finished products and fully pulverizes materials through two pulverizing mechanisms, an oblique pulverizing gap enables pulverizing time to be long and enables pulverizing to be sufficient, the material pulverizing effect is ensured, the size of pulverized material particles can be controlled, practicability is high, dehumidification is performed in the drying process through a drying device, drying efficiency is improved, noise in the working process of the efficient pulverizer is small, and a working environment of an operator is improved.

The invention discloses cyclodextrin modified nano-silver hydrogel, and a preparation method and an application thereof. The cyclodextrin modified nano-silver hydrogel contains 0.1%-0.4% by mass of nano-silver particles modified by in-situ reduction of cyclodextrin, the nano-silver particles are uniformly dispersed, the tensile strength of the cyclodextrin modified hydrogel is 3.5-6 MPa, and the relative standard error for measuring a molecular surface scanning Raman signal is lower than 10%. The preparation method comprises the following steps: (1) uniformly mixing cyclodextrin with a silver salt aqueous solution to obtain a mixture, and heating under an alkaline condition to react to obtain cyclodextrin modified nano-silver gel; and (2) adding a gelator, and preparing the cyclodextrin modified nano-silver hydrogel via a frozen gel forming method. The cyclodextrin modified nano-silver hydrogel provided by the invention is good in uniformity, strong in repeatability, good in mechanical property, sensitive in detection, simple to prepare and mild in reaction, and is used as a surface enhanced Raman substrate.

The invention relates to an environmental response type anti-tumor nanometer medicine with high medicine loading capacity, a carrier and a preparation method thereof. The nanometer medicine comprisesan amphiphilic polymer carrier and a medicine prodrug; the amphiphilic polymer carrier comprises a hydrophilic segment and a hydrophobic segment which are connected mutually; the hydrophilic segment comprises polyethylene glycol or poly(N-(2-hydroxypropyl)methacrylamide); the hydrophobic segment comprises D-alpha-tocopherol succinate; the medicine prodrug comprises a medicine for treating tumor aswell as a hydrophobic chain segment which is connected with the medicine through a chemical bond; and the hydrophobic chain segment comprises D-alpha-tocopherol succinate. The nanometer medicine hasthe characteristics of high medicine loading capacity, environmental responsiveness and adjustable and controllable grain size, and can achieve the properties that the tumor penetration ability is high, the tumor cell multidrug resistance is achieved, drug-resistant cells are killed in advance, tumor related fibroblast is not killed and tumor stem cells can be killed effectively according to composition of different polymers and the loaded prodrug molecule types.

The invention provides a method for preparing gold nanoparticles through fructus lycii extract liquid. The method comprises the following steps that firstly, fructus lycii is washed and then subjected to extraction through deionized water, and the fructus lycii extract liquid is obtained; secondly, the fructus lycii extract liquid obtained in the first step is heated to be boiled, and boiling is kept for a certain time, a chloroauric acid solution is added into the fructus lycii extract liquid to form a reaction system, the pH of the reaction system is adjusted to be 4.0-5.5 by regulating the addition amount of the chloroauric acid solution, the reaction system is kept in a boiling state, reaction is carried out for 2-60 minutes, and reaction liquid is obtained; thirdly, the reaction liquid obtained in the second step is subjected to centrifugal separation, precipitate is obtained and dried, and the gold nanoparticles are obtained. The particle sizes of the gold nanoparticles prepared through the method are smaller than 50 nm, and the gold nanoparticles do not contain chemical reagent residuals and are suitable for being applied to the field of biological medicines.

The invention discloses a composite condensation product with a double-embedding function as well as a preparation method and application of the composite condensation product. The preparation methodcomprises the following steps: (1) adding Zein into an ethanol water solution, and carrying out stirring for dissolving to obtain a Zein solution; (2) adding chitosan into an acetic acid solution, carrying out stirring for dissolving, and then carrying out overnight hydration to obtain a chitosan anti-solvent solution; (3) adding curcumin and quercetin into the Zein solution, carrying out uniformstirring and mixing, and then carrying out overnight hydration to obtain a Zein-Cur-Que mixed solution; and (4) adding the chitosan anti-solvent solution into the Zein-Cur-Que mixed solution, carryingout uniform stirring and mixing, then carrying out rotary heating to remove ethanol, and then adjusting the pH value to 3.0-7.0 to obtain the composite condensation product with the double-embeddingfunction. The composite condensation product disclosed by the invention can simultaneously embed two substances with different polarities, is high in embedding rate and high in bioavailability, and can be used in the field of food processing.

The invention discloses a method of preparing lithium battery vanadate positive materials by utilizing a hydrothermal method. The method comprises the following steps of: mixing ammonium metavanadate and a hydrogen dioxide solution in 35ml deionized water, stirring the mixture under an indoor temperature until obtaining a clear yellow solution, adding soluble salt of stoichiometric ratio into the solution, continuing stirring the solution so as to uniformly mix, shifting the solution into a 50ml autoclave, and carrying out a hydrothermal reaction, thus obtaining the lithium battery vanadate positive materials after the hydrothermal method or sintering after the hydrothermal method. According to the method provided by the invention, the lithium battery vanadate positive materials, such as AgVO3 and Na0.33V2O5, prepared by the method have the good electrochemical property, the preparation period is short, the process is simple, the productive rate of a product is large, and the purity is high.

The present invention describes soap-free emulsion polymerization process to prepare fluorous emulsion. The fluorous emulsion is prepared with trifluorochloroethylene as main component and through the ternary copolymerization of three kinds of monomer including trifluorochloroethylene, alphatic olefine ester and alphatic olefine acid; and has homogeneous grains and high storage stability. The copolymerization is completed in a high pressure reactor with water, monomers and initiator, at 65-75 deg.c and 0.7-2.5 MPa condition for 20-45 hr. The fluorous emulsion has solid content of 21-35 %, and polymer number average molecular weight of 7000-9500, and may be stored stably for over 6 months without lamination and gelatinizing.

The invention relates to an organic-inorganic hybrid shell bifunctional phase change capsule and a preparation method thereof. The material comprises a main body material, a monomer, an initiator andan emulsifier, wherein the mass percentage content of each component is as follows: 25%-75% of the main body material, 30%-50% of the monomer, 0.5%-3% of the initiator and 2%-20% of the emulsifier; the main body material is industrial organic paraffin with a melting point of 5-58 DEG C; and in the preparation process, the polydivinylbenzene / TiO2 hybrid shell bifunctional phase change capsule withadjustable micron-scale to nano-scale particle sizes is prepared through Pickering emulsion polymerization. According to the preparation method, the organic-inorganic mixed phase is pretreated throughhigh-speed dispersion under the condition that a co-emulsifier is not added, so that the organic-inorganic hybrid shell bifunctional phase change capsule has a smaller micro-nano size, and the prepared capsule has better heat-conducting property and mechanical property; the heat transfer rate is improved; and moreover, the excellent formaldehyde light degradation performance is also realized.

The invention relates to a preparation method of particle size homogeneous nanometer spinel ferrite, which belongs to the art of the metal oxides preparation. Metallic ion is first deoxidized into highly scattered nanometer metallics in a colloid mill, and then the blended solution containing the nanometer metallics is transferred into a Teflon gallbladder for water hot crystallization under high-pressured reaction so as to form the spinel ferrite particle with a diameter of 5 to 200 nanometers. The invention has the advantages that the high-speed shearing action of the colloid mill ensures that the deoxidized metallics are highly dispersed, thereby enabling the particle size homogeneous nanometer spinel ferrite. The reaction is carried in the solution, and the diameter of the nanometer particle can be controlled through adjusting the reactant density, the reaction temperature and the reaction time; since no need for high-temperature roasting process in the reaction, the operation becomes quite easy. Moreover, the invention has low cost and low energy consumption, thereby being favorable for industrialized application.

The invention relates to a self-supporting SiOx-based composite negative electrode material and a preparation method thereof. The negative electrode material comprises a three-dimensional conductive inner core M, a SiOx layer and a carbonaceous shell. The SiOx gas is deposited in situ and coats the surface of the three-dimensional conductive inner core to form a three-dimensional frame structure of a three-dimensional conductive inner core M@SiOx layer, a carbon source precursor is employed for pyrolytic reaction and then coats the surface of the three-dimensional frame structure to form the carbonaceous shell. The preparation method of the self-supporting SiOx-based composite negative electrode material comprises the steps of: putting the three-dimensional conductive inner core into a furnace with inert gas shielding, introducing the SiOx gas into the furnace to deposit the SiOx gas on the surface of the three-dimensional conductive inner core to form a three-dimensional structure ofM@SiOx; and uniformly mixing the three-dimensional frame structure and the carbon source precursor to perform pyrolysis reaction to obtain the self-supporting SiOx-based composite negative electrode material. The self-supporting SiOx-based composite negative electrode material has the advantages of good structural stability, high first coulombic efficiency and good cycling stability. The preparation process is simple in flow, easy to control, low in synthesis cost and suitable for large-scale production.

The invention discloses a nitrogen-doped carbon quantum dot and a preparation method thereof. The method comprises the following steps: providing an organic phenol, mixing the organic phenol with peroxide in a solvent to carry out a phenolic hydroxyl oxidation reaction to obtain an organic hydrazine; and providing an organic amine to react with the organic hydrazine in a closed environment to obtain the nitrogen-doped carbon quantum dot. By using organic phenol, organic amine, peroxide and deionized water as raw materials, the nitrogen-doped carbon quantum dot which has stable fluorescence performance and stable chemical properties and is dispersible in water and environment-friendly is synthesized. By regulating the ratio of the raw materials and the reaction time, the structure, particlesize and optical performance of the nitrogen-doped carbon quantum dot are regulated. No heat source is needed by the method such that energy consumption is low, cost is low and operation is simple. Meanwhile, the nitrogen-doped carbon quantum dot material prepared by the method does not contain heavy metals such as Cd and Te, and has wider application fields than traditional quantum dot materials.

The invention provides a preparation method of magnetic nanometer particles with the adjustable and controllable particle diameter. According to the preparation method, a chemical thermal decomposition method is adopted, firstly, organic substances and partial or all metal precursors are mixed to take complex reaction so that at least partial metal precursors take the complex reaction with the organic substances, the decomposition speed of the partial metal precursors in the subsequent chemical thermal decomposition reaction is changed, then, mixed solution subjected to the complex reaction is mixed with reaction solvents, the rest metal precursors and surface active agents to form a reaction system, the temperature of the reaction system is raised for carrying out the chemical thermal decomposition reaction, the constant-temperature maintaining and the centrifugal separation are carried out after the reaction, and the magnetic nanometer particles are obtained. The method has the advantages that only the consumption of the organic substances participating in the complex reaction needs to be regulated, other reaction conditions are maintained unchanged, the regulation and the control of the particle diameter of the magnetic nanometer particles can be realized, and in addition, the regulation and control range can reach 0.5nm, so the invention belongs to the preparation method of the magnetic nanometer particles with the adjustable and controllable particle diameter, and good application prospects are realized.

The invention discloses a method for preparing microcrystalline celluloses by acid hydrolysis after pretreatment through high shear machinery. The method comprises the following steps: firstly, pulping and filtering wood dissolving pulp or refined cotton by high shear machinery to obtain pretreated pulp; mixing the pretreated slurry with acid liquor, and carrying out acid hydrolysis reaction to obtain an acid hydrolysis reaction product; finally, filtering the acid hydrolysis reaction product to obtain hydrolyzed celluloses; and washing the hydrolyzed celluloses to be neutral, and carrying outspray drying to obtain microcrystalline celluloses. According to the invention, the wood dissolving pulp or refined cotton is subjected to pulping pretreatment by the high shear machinery, the actingforce of the high shear machinery is used for cutting off fibers in the pretreatment process, so that the porosity and the specific surface area inside the fibers are increased, the accessibility ofacid liquor to the celluloses is improved, the penetration speed of the acid liquor into the celluloses is increased, the acid hydrolysis rate of the acid liquor to a cellulose amorphous region is increased, and the dosage of chemicals is reduced or the reaction time is shortened. The particle size of the microcrystalline cellulose product is regulated and controlled.

The invention discloses an organic-inorganic hybrid nanoparticle based on POSS (polysilsesquioxane) and ferrocene as well as a preparation method of the organic-inorganic hybrid nanoparticle. The organic-inorganic hybrid nanoparticle is obtained by self-assembling POSS-terminated poly(dimethylaminoethyl methacrylate)-b-poly(ferrocenyl hydroxyethyl methylacrylate) in an aqueous solution. The preparation method is simple, the condition is mild, the prepared organic-inorganic hybrid nanoparticle has the characteristics of temperature, pH and oxidation-reduction property response, the particle size can be regulated through temperature, pH, oxidation-reduction property and the like in the environment easily, and the organic-inorganic hybrid nanoparticle has potential application value in the field of functional polymers.

The invention discloses a particle controllable preparation method and device based on an ultrasonic auxiliary continuous anti-solvent film dialysis process. A first sealed container of the device is connected with a first peristaltic pump. The first peristaltic pump is connected with a lower end connector of a film module shell pass. A fourth sealed container is connected with an upper end connector of the film module shell pass. A second sealed container is connected with a second peristaltic pump. The second peristaltic pump is connected with a lower end connector of a film module tube pass. Hollow fiber film bundles in a film module form a tubular structure, the tube pass of the film module is formed, and the space between the hollow fiber bundles and a film module shell forms the shell pass of the film module. By the adoption of the ultrasonic auxiliary continuous operation film module, the anti-solvent and solvent on the two sides of a film are controlled to penetrate towards the opposite sides correspondingly, raw materials are promoted to be separated out of a solution, and particle growth and dispersion are adjusted and controlled through dynamic dialysis and ultrasound enhancing, so that particles which are controllable in particle size, narrow in particle size distribution and good in dispersity are prepared efficiently, and the preparation method and device can be used for preparing various oral preparations or can be used for further processing of injections.

The invention discloses an alum crushing plant with a centralized sewage disposal function. The alum crushing plant comprises a base, hydraulic assemblies are fixedly connected to the lower surface, close to the two sides, of the base, idler wheels are arranged on the bottoms of the hydraulic assemblies, a through groove is formed in the upper surface of the base, a disposal mechanism is fixedly connected to the upper surface of the base through the through groove, the disposal mechanism comprises a shell, a frame and a driving motor, the surface of the shell is fixedly connected with the inner wall of the through groove in the base, the top of the inner wall, close to the left side, of the shell is fixedly connected with an inner threaded pipe, the inner wall of the inner threaded pipe isconnected with a screw rod in a threaded mode, the surface, close to the bottom, of the screw rod adopts polished rod design, and a first though hole allowing the screw rod to rotate is formed in theupper surface, close to the left side, of the frame. According to the alum crushing plant with the centralized sewage disposal function, the problems that in the actual use process, due to insufficient follow-up treatment of alum after the alum is crushed by rotation of blades, alum accumulation and obstruction are likely to be caused, the work efficiency is reduced and using is inconvenient aresolved.