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62results about How to "Experimental repeatability is strong" patented technology

Transparent nanometer zirconium dioxide liquid phase dispersoid, and preparation method and application thereof

The invention discloses transparent nanometer zirconium dioxide liquid phase dispersoid, and a preparation method and application thereof. The dispersoid comprises liquid phase media and nanometer zirconium dioxide particles, wherein the nanometer zirconium dioxide particles are uniformly dispersed into liquid phase media; the solid content of the dispersoid is 1 weight percent to 50 weight percent; the one-dimensional dimension of the nanometer zirconium dioxide particles is 1 to 12nm; the liquid phase media are water, organic solvents, a mixture of water-soluble organic solvents and water, or a mixture of different organic solvents. The nanometer zirconium dioxide in the product has high crystallinity degree; the particle diameter is small; the distribution is uniform; any surfactant is not contained; the purity is high; the dispersion effect is good; no sedimentation occurs after the still standing for 6 months or longer. The product prepared by the method does not need any treatment, and is directly the transparent nanometer zirconium dioxide liquid phase dispersoid; any substance does not need to be added for dispersion assistance; the problems of easy agglomeration, poor dispersibility and poor optical performance of the composite material are solved; higher application performance and wider application ranges are given to the product.
Owner:BEIJING UNIV OF CHEM TECH

Method for preparing alloy material of high niobium-titanium-aluminum by discharging plasma agglomeration

This invention discloses a method for preparing high-Nb Ti-Al alloy by discharge plasma sintering. The method comprises: loading element mixed powder alloy powder into a graphite mold, placing in a discharge plasma-sintering furnace, applying an axial pressure of 10-80 MPa, heating at a rate of 50-800 deg.C / min in 10-2-6 Pa vacuum or inert atmosphere, sintering at 900-1400 deg.C, keeping the temperature, and cooling to room temperature to obtain high-Nb Ti-Al alloy blocks. The method can prepare highly compact high-Nb Ti-Al alloy blocks with uniform composition and high performance in a short time and at a low sintering temperature. Besides, the method also has such advantages as low energy consumption, little pollution, easy operation and good repeatability.
Owner:UNIV OF SCI & TECH BEIJING

Preparation method for sodium alginate-acrylamide-based hydrogel

The invention discloses a preparation method for sodium alginate-acrylamide-based hydrogel. The preparation method comprises the following steps of: dissolving sodium alginate powder in deionized water; then sequentially adding an acrylamide monomer, a methylene diacrylamide cross-linking agent, ammonium persulfate and an N,N,N',N'-tetramethylethylenediamine catalyst; uniformly stirring the materials, pouring the mixture into a glass die, and heating the mixture to obtain a hydrogel; completely soaking the hydrogel in a 0.01-1 mol / L non-monovalent cation aqueous solution for 1-10 hours, wherein cations diffuse and enter in a hydrogel network structure, and induce sodium alginate to cross-link, so as to generate the high-strength and high-toughness sodium alginate-acrylamide-based hydrogel during the process. The hydrogel disclosed by the invention has the following performances: the highest tensile strength can achieve 1 MPa, and the highest tensile elasticity modulus can achieve 250 KPa; a loading-unloading test is performed on the hydrogel, and when the great tensile multiple before unloading is 8, the highest dissipated energy can achieve 2180 KJ / m<3>.
Owner:XI AN JIAOTONG UNIV

Preparation method of calcium phosphate nanopowder with controllable length-to-diameter ratio and calcium-to-phosphorus ratio

The invention discloses a preparation method of calcium phosphate nanopowder with a controllable length-to-diameter ratio and calcium-to-phosphorus ratio. The method comprises the step: carrying out areaction by mixing phosphate or phosphoric acid with a calcium salt to prepare the calcium phosphate nanopowder, wherein the one-dimensional size of a calcium phosphate nanoparticle can be regulatedto be 50nm-5mu m and the length-to-diameter ratio can be regulated to be 2-50 by adding a pH regulator into a reactant, components and proportions of the calcium phosphate nanopowder serving as a product can be regulated by controlling the feeding ratio of the phosphate or phosphoric acid to the calcium salt to be 1.5-1.67, and the calcium phosphate nanopowder is beta-tricalcium phosphate and / or hydroxyapatite. According to the method disclosed by the invention, the length-to-diameter ratio of the product is regulated by controlling the proportion of weak bases and relatively strong bases in the pH regulator; the calcium-to-phosphorus ratio of the product is controlled by changing the feeding ratio of a calcium source to a phosphorus source; a supergravity technology is combined to enhancea micromixing effect, so that the calcium phosphate nanopowder is prepared; and the preparation method is low in production cost, simple in operation, good in repeatability, better in application performance and wider in application range.
Owner:BEIJING UNIV OF CHEM TECH

Nanometer hydroxyapatite dispersion body and preparation process thereof

The present invention discloses a nanometer hydroxyapatite dispersion body and a preparation process thereof. According to the nanometer hydroxyapatite dispersion body, nanometer hydroxyapatite particles are uniformly dispersed in a liquid phase medium, the solid content of the nanometer hydroxyapatite dispersion body is 1-5 wt%, the size of the nanometer hydroxyapatite particles is 40-60 nm, theaspect ratio of the nanometer hydroxyapatite particles is 1-5, and the liquid phase medium is water, an organic solvent, the mixture of a water-miscible organic solvent and water, or the mixture of different organic solvents. According to the present invention, by combining the hydrothermal method and the super gravity technology, the microcosmic mixing effect is strengthened, and the method has advantages of low production cost, simple operation and good repeatability; the prepared nanometer hydroxyapatite dispersion body has advantages of controlled particle size, good dispersion effect andgood stability; and with the technical scheme, the problems of easy agglomeration, poor dispersibility and the like of the nanometer hydroxyapatite particles can be solved, and the product can be endowed with the high application performance and the broad application range.
Owner:BEIJING UNIV OF CHEM TECH

High-dispersity nano-zirconia particles and method for preparing transparent dispersoid of high-dispersity nano-zirconia particles

The invention discloses high-dispersity nano-zirconia particles and a method for preparing transparent dispersoid of the high-dispersity nano-zirconia particles. The solid content of transparent nano-zirconia liquid phase dispersoid ranges from 1 wt% to 80 wt%, zirconia crystals are small in grain size and even in distribution, the one-dimensional size ranges from 1 nanometer to 10 nanometers, andthe average grain size is 3 nanometers. According to the preparation method, the nano-zirconia particles are prepared through a method for pyrolyzing inorganic zirconium salt in a supergravity environment, the aggregation performance is greatly reduced as the supergravity level is improved, and then the transparent zirconia liquid phase dispersoid is directly obtained after washing and modifyingare carried out; the problem that nano-zirconia particles are easy to aggregate, poor in dispersity and poor in composite optical performance can be solved, and therefore the product has higher application performance and a wider application range.
Owner:BEIJING UNIV OF CHEM TECH

Method for preparing transparent aluminum hydroxide liquid dispersion

The invention relates to a method for preparing transparent aluminum hydroxide liquid dispersion. The method comprises the following steps: 1) dissolving an aluminum salt in water or in an organic solvent to prepare an aluminum salt solution and dissolving alkali in water or in another organic solvent so as to prepare alkali liquor; 2) adding the aluminum salt solution and the alkali liquor into a hypergravity rotation packed bed or sleeve type annular micro-channel reactor for precipitation and crystallization so as to prepare an aluminum hydroxide precursor suspension; 3) transferring the aluminum hydroxide precursor suspension into a hydro-thermal reaction vessel for water / solvent heat treatment; 4) subjecting slurry obtained after water / solvent heat treatment to standing, cooling, filtering and washing so as to obtain a filter cake; and 5) dispersing the cleaned filter cake in a liquid medium so as to obtain the transparent aluminum hydroxide liquid dispersion. The transparent aluminum hydroxide liquid dispersion prepared in the invention has good stability and has the characteristics of high ZETA potential, obvious Tyndall effect and thixotropic gelation.
Owner:BEIJING UNIV OF CHEM TECH

C21 steroid saponin aglycone derivative as well as preparation method and application thereof in preparing anti-tumor drugs

The invention discloses a C21 steroid saponin aglycone derivative as well as a preparation method and an application thereof in preparing anti-tumor drugs. The structural formula of the C21 steroid saponin aglycone derivative is as shown in formula IX. The C21 steroid saponin aglycone derivative disclosed by the invention has the advantages of being better in bioactivity, higher in selectivity, lower in toxicity and the like. The C21 steroid saponin aglycone derivative has a significant inhibitory effect on human breast cancer cells, cervical cancer cells, lung cancer cells and liver cancer cells (as shown in Specification), wherein R1 is selected from H and F, R2 is selected from H and F, and R3 is selected from H and F.
Owner:JIANGSU NAIQUE BIOLOGICAL ENG

Sapogenin derivative, preparation method of derivative and application thereof in preparation of antitumor drugs

The invention discloses a sapogenin derivative shown as a structural formula IX, a preparation method of the sapogenin derivative, and application thereof in preparation of antitumor drugs. The structural formula is as shown in the specification, wherein R1 is selected from H and CH3; R2 is selected from H and CH3; and n refers to 1 and 2. The sapogenin derivative disclosed by the invention has the advantages of high biological activity, high selectivity, low toxicity and the like and has obvious effects of inhibiting human breast cancer cells, cervical cancer cells, lung carcinoma cells and hepatoma carcinoma cells.
Owner:JIANGSU NAIQUE BIOLOGICAL ENG

Fiber coated with liquid metal and preparation method thereof

The invention relates to a preparation method for a fiber coated with a liquid metal. The preparation method for the fiber coated with the liquid metal is based on microfluidic technology and comprises the steps that first, a polymer fiber with a hollow structure is obtained; the polymer fiber is collected by a conveyor belt and a turntable; the liquid metal is poured into a fiber cavity by an injection method; and the fiber coated with the liquid metal is obtained. The fiber coated with the liquid metal is a polymer, and the liquid metal is wrapped inside. The diameter of the fiber is 100-1,000 [mu]m and the length is 1 cm- to 10 m. The preparation method for the fiber coated with the liquid metal has simple operation, low cost, strong experiment reproducibility, uniform fiber structure,controllable size, good conductivity, stretchable deformation, and can be used as indispensable conductive and sensing elements in flexible electronic systems, and has broad application prospects.
Owner:NANJING DRUM TOWER HOSPITAL

Indium aluminum zinc oxide thin film transistor based on gate dielectric layer with high dielectric constant and full room temperature preparation method thereof

The invention relates to an indium aluminum zinc oxide thin film transistor based on a gate dielectric layer with high dielectric constant and a full room temperature preparation method thereof. The indium aluminum zinc oxide thin film transistor includes a P<+>-Si substrate, a Ta2O5 gate dielectric layer, double active layers, a source electrode and a drain electrode which are arranged in turn from bottom to top. The preparation method includes the following steps: (1) growing a Ta2O5 gate dielectric layer on a P<+>-Si substrate; (2) growing a first layer of IAZO film on the Ta2O5 gate dielectric layer; (3) growing a second layer of IAZO film on the first layer of IAZO film; and (4) growing a source electrode and a drain electrode on the second layer of IAZO film. An IAZO TFT with excellent performance is prepared in a room temperature environment by exploring and optimizing the sputtering preparation conditions of the Ta2O5 gate dielectric layer. The prepared IAZO TFT shows extremelyhigh electrical performance, and has a broad application prospect in flexible display and integrated circuits in the future.
Owner:SHANDONG UNIV

Experimental device and method for measuring efficiency of replacing crude oil with supercritical carbon dioxide in tight oil core

The invention relates to an experimental device and method for measuring the efficiency of replacing crude oil with supercritical carbon dioxide in a tight oil core. The invention belongs to the technical field of oil-gas field development. The device comprises a constant-temperature box, an intermediate container containing crude oil and CO2, a rock core holder and a replacement intermediate container, saturated crude oil operation and CO2 pressurization and injection operation are conducted on a rock core through a displacement pump, the amount of crude oil replaced by CO2 under different pressures and different pressure drops is measured, and the CO2 utilization rate and the CO2 crude oil replacement efficiency are calculated. Compared with the prior art, according to the invention, themeasurement of the efficiency of replacing crude oil in a compact rock core with supercritical CO2 at high temperature and high pressure is realized; gas expansion errors caused by adopting a traditional rock core weighing method are reduced, the limitation that the traditional method can only measure the replacement efficiency from formation pressure to atmospheric pressure is broken through, and measurement of the crude oil replacement amount under different pressure drops and gas-oil separation and accurate metering in the pressure drop process are achieved. The device is low in construction cost, wide in application range, high in precision, high in experiment repeatability and easy to popularize.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Preparing method of chondriosome-targeted multilayer tumor deep-penetration sound sensitizer with sound responsiveness

The invention belongs to the technical field of biological medicine, and particularly discloses a preparing method of a chondriosome-targeted multilayer tumor deep-penetration sound sensitizer with sound responsiveness. The method comprises the following steps of 1, synthesizing an adipose membrane with IR780; 2, hydrating the adipose membrane obtained in step 1, adding PFP, and conducting sonic vibration and centrifugation under an ice bath to prepare the sound sensitizer IR780-NDs. The sound sensitizer prepared by means of the preparing method can deeply penetrate through tumors at multiplelayers, and is uniformly distributed in the tumors.
Owner:CHONGQING MEDICAL UNIVERSITY

Device and method for simulating hydrate decomposition induced by invasion of drilling fluid into reservoir

The invention provides a device and a method for simulating hydrate decomposition induced by invasion of drilling fluid into a reservoir. The device comprises a high-pressure reaction kettle (34), a high-low-temperature water bath temperature control system (102), a high-low-temperature constant-temperature air bath box (21), a drilling fluid pumping system (104), a gas control system (105), a back-pressure unloading system (106) and a data acquisition system (107), wherein the reaction kettle is arranged in the high-low-temperature constant-temperature air bath box, a reaction temperature ofthe reaction kettle and a gas temperature in the gas control system are respectively controlled by the high-low-temperature water bath temperature control system, and the drilling fluid pumping systemis connected to the reaction kettle through a pipeline, the back-pressure unloading system and the gas control system communicate with the interior of the reaction kettle through pipelines and air inlet / outlet holes (10) formed in the upper part of the reaction kettle, and the back-pressure unloading system is used for separately controlling the pressure balance of the reaction kettle, the gas control system and the outside.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

A kind of transparent nano-zirconia liquid phase dispersion and its preparation method and application

The invention discloses transparent nanometer zirconium dioxide liquid phase dispersoid, and a preparation method and application thereof. The dispersoid comprises liquid phase media and nanometer zirconium dioxide particles, wherein the nanometer zirconium dioxide particles are uniformly dispersed into liquid phase media; the solid content of the dispersoid is 1 weight percent to 50 weight percent; the one-dimensional dimension of the nanometer zirconium dioxide particles is 1 to 12nm; the liquid phase media are water, organic solvents, a mixture of water-soluble organic solvents and water, or a mixture of different organic solvents. The nanometer zirconium dioxide in the product has high crystallinity degree; the particle diameter is small; the distribution is uniform; any surfactant is not contained; the purity is high; the dispersion effect is good; no sedimentation occurs after the still standing for 6 months or longer. The product prepared by the method does not need any treatment, and is directly the transparent nanometer zirconium dioxide liquid phase dispersoid; any substance does not need to be added for dispersion assistance; the problems of easy agglomeration, poor dispersibility and poor optical performance of the composite material are solved; higher application performance and wider application ranges are given to the product.
Owner:BEIJING UNIV OF CHEM TECH

Preparation method of bioactive medical dressing

The invention discloses a preparation method of a bioactive medical dressing. The method comprises the following steps of S1, taking raw material solutions for later use, and performing printing through a microfluidic 3D printing assembly; and S2, introducing contents into all channels in a multi-channel coaxial jet head, controlling the flow speed, setting parameters of a 3D printer, and using the 3D printer to control a micro-fluidic chip to print the three-dimensional diabetic foot ulcer functional medical dressing, wherein the raw material solutions comprise an alginate solution, a first high-molecular polymer solution, a bioactive component solution and a second high-molecular polymer solution. According to the method, the process is simple, subsequent treatment of the dressing is not needed, the production efficiency is high, the cost is low, the product is stable, the precision is high, and the experimental repeatability is high.
Owner:WUYI UNIV

Method for evaluating driving ability of automatic driving automobile in hybrid driving environment

The invention discloses a method for evaluating the driving ability of an automatic driving automobile in a hybrid driving environment, and the method comprises the steps: constructing a scene modeling method suitable for the testing of the automatic driving automobile according to a scene generation process of a driving simulator, and controlling a background automobile in a scene through the control of the hardware of the driving simulator by a human driver, wherein the driving simulator software enables the external program to control the tested automatic driving automobile in the scene through the API, thereby achieving the testing of the automatic driving automobile in the mixed driving environment; and finally, establishing an evaluation index and an evaluation standard, and visually displaying an evaluation result in a score mode. Compared with a virtual simulation test, the method has the advantages that man-machine interaction can be realized, and the randomness of a human driver is considered. Compared with a field real vehicle test, the method has the advantages of rich and changeable scenes, high repeatability, low cost and high efficiency.
Owner:SOUTHEAST UNIV

Intelligent floating-structure mooring and broken cable experiment simulation system

The invention discloses an intelligent floating-structure mooring and broken cable experiment simulation system. The intelligent floating-structure mooring and broken cable experiment simulation system comprises an experiment module, an intelligent broken cable device, a mooring cable and an intelligent control and monitoring system, wherein the intelligent broken cable device is fixedly arrangedat a position of a cable guide hole of the experiment model, one end of the mooring cable is fixedly arranged at the bottom of a pool, the other end of the mooring cable is connected to the intelligent broken cable device, the mooring cable is connected to the position of the cable guide hole of the experiment model by the intelligent broken cable device, the mooring cable and the experiment modelcan be disconnected by the intelligent broken cable device, the intelligent broken cable device is controlled to achieve broken cable control of the mooring cable by the intelligent control and monitoring system, and dynamic response monitoring of the experiment model and instantaneous tension monitoring of the mooring cable are achieved. Broken cable control of a floating mooring structure is simulated under an experiment condition, the instantaneous dynamic response of a floating body and the dynamic characteristic of the mooring cable can be accurately simulated when the mooring cable is broken, and the problem of broken cable instantaneous control and monitoring under the experiment condition is solved.
Owner:TIANJIN UNIV

A preparation method of calcium phosphate nanopowder with controllable aspect ratio and calcium-phosphorus ratio

The invention discloses a preparation method of calcium phosphate nanopowder with a controllable length-to-diameter ratio and calcium-to-phosphorus ratio. The method comprises the step: carrying out areaction by mixing phosphate or phosphoric acid with a calcium salt to prepare the calcium phosphate nanopowder, wherein the one-dimensional size of a calcium phosphate nanoparticle can be regulatedto be 50nm-5mu m and the length-to-diameter ratio can be regulated to be 2-50 by adding a pH regulator into a reactant, components and proportions of the calcium phosphate nanopowder serving as a product can be regulated by controlling the feeding ratio of the phosphate or phosphoric acid to the calcium salt to be 1.5-1.67, and the calcium phosphate nanopowder is beta-tricalcium phosphate and / or hydroxyapatite. According to the method disclosed by the invention, the length-to-diameter ratio of the product is regulated by controlling the proportion of weak bases and relatively strong bases in the pH regulator; the calcium-to-phosphorus ratio of the product is controlled by changing the feeding ratio of a calcium source to a phosphorus source; a supergravity technology is combined to enhancea micromixing effect, so that the calcium phosphate nanopowder is prepared; and the preparation method is low in production cost, simple in operation, good in repeatability, better in application performance and wider in application range.
Owner:BEIJING UNIV OF CHEM TECH

Nano modified composite material and preparation method and application thereof

The invention discloses a nano modified composite material and a preparation method and application thereof. The preparation method comprises the following steps of: pre-dispersing carbon nanotubes by using a dispersing agent to obtain a uniformly dispersed carbon nanotube dispersion liquid, the dispersing agent being uniformly distributed and coating the surfaces of the carbon nanotubes; removing moisture in the carbon nanotube dispersion liquid, then carrying out high-temperature treatment on the obtained dried carbon nanotubes, and removing the dispersing agent on the surfaces of the carbon nanotubes to obtain pre-dispersed carbon nanotubes; and uniformly mixing the pre-dispersed carbon nanotubes with resin to obtain the nano-modified composite material. According to the preparation method, use of strong acid and organic solvents is avoided in the whole dispersion process, the dispersing agent is used in the pre-dispersion stage and is easy to remove, experimental conditions are simple and easy to operate, environmental pollution is avoided, the viscosity of the resin dispersion is greatly reduced under the same content of the pre-dispersed carbon nanotubes, and the processing manufacturability is greatly improved. The method can be widely applied to composite material preparation and other fields.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI

ZnS nanobelt/CdS nanorod heterojunction synthetic method

The invention discloses a ZnS nanobelt / CdS nanorod heterojunction synthetic method, and the method is characterized in that the method comprises the following steps: firstly depositing a gold film on a silicon substrate through employing an ion sputtering instrument, putting ZnS powder into a ceramic boat, and placing the ceramic boat at the position of a pipe-type thermocouple; secondly placing the silicon substrate in a downwind direction of the ZnS powder, letting in argon gas, increasing the reaction temperature to 900+ / -20 DEG C under the protection of the argon gas, and carrying out reaction for 2+ / -0.5h under the temperature, wherein a white sample can be seen on the silicon substrate after the reaction; finally opening a device, placing the CdS powder at the position of the thermocouple, placing the white sample at a downwind port of the ZnS powder, increasing the reaction temperature to 800+ / -20 DEG C under the protection of the argon gas, carrying out reaction for 1+ / -0.3h at the temperature under the protection of argon gas, decreasing the temperature to the indoor temperature after the reaction is completed, and obtaining a flaxen sample on the silicon substrate.
Owner:GUIZHOU UNIV

Acylhydrazone copper (II) complex and preparation method and application in inhibiting urease activity thereof

The invention discloses an acylhydrazone copper (II) complex and a related preparation method and application in inhibiting urease activity thereof. The preparation method is as shown in the description. According to the acylhydrazone copper (II) complex, the acylhydrazone copper (II) complex has a higher inhibiting effect on the urease activity, the inhibition ratio is 95.1% under the concentration of 50 microgram per milliliter, and the IC50 value is 0.18+ / -0.02 microgram per milliliter.
Owner:LIAONING NORMAL UNIVERSITY

Experimental Setup and Method for Evaluating Hydrate Formation and Accumulation Behavior in Deepwater Drilling

The invention discloses an experimental device and method for evaluating formation and aggregation behaviors of hydrate in deepwater drilling. The experimental method comprises a high-pressure reaction kettle, a high / low-temperature incubator, a gas control system, a return pressure unloading system and a data acquisition system, wherein a middle barrier and a side barrier are arranged in the inner cavity of the high-temperature reaction kettle; a fluid flowing channel is formed in one side of the side barrier; an air inlet and an air outlet are formed in the top of the high-pressure reaction kettle; a lower air inlet is formed in the bottom of the high-pressure reaction kettle; both the upper air inlet and the lower air inlet are connected with the gas control system; the air outlet is connected with the return pressure unloading system. The experimental device aims at drilling fluid systems of natural gas hydrate stratum drilling, frozen earth drilling and ocean drilling, the process that decomposition gases or shallow gases of hydrate in drillings or stratums enter shaft annuluses to form hydrate can be simulated, and furthermore the influence of annulus circulation channels upon formation and aggregation behaviors of the hydrate and the capability of drilling fluid upon the formation and aggregation behaviors of the hydrate can be evaluated and simulated.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

A kind of aspirin crystal and its crystallization method and application

ActiveCN110156602BImpurity content meetsThe impurity content meets the requirements of the PharmacopoeiaOrganic compound preparationAntipyreticPyrrolidinonesBond formation
The invention discloses an aspirin crystal, a crystallization method and application thereof. In the present invention, water-soluble polymer additives are added to the crystallization system, the ideal morphology of aspirin is obtained through molecular simulation, and the molecular arrangement of the (0 1 1) crystal plane is obtained by cutting, and it is found that the (0 1 1) crystal plane is composed of exposed hydroxyl groups, The carbonyl group and the oxygen atom in the ester group are easy to interact with polyvinylpyrrolidone to form hydrogen bonds and form strong adsorption. In addition, polyvinylpyrrolidone and vinylpyrrolidone-vinyl acetate copolymers have relatively large molecular weights and will not intercalate crystals. cells become impurities. The obtained product particles have small aspect ratio, good fluidity, high bulk density, high yield and up to standard impurity content. Strong repeatability, little interference from external factors, especially suitable for industrial production.
Owner:SOUTH CHINA UNIV OF TECH

Nickel oxide nanoparticles and synthesis method thereof

The invention discloses nickel oxide nanoparticles and a synthesis method thereof. The method comprises the following steps: adding sodium alginate powder into a wet-process shearing granulator, starting a stirring paddle and a cutter, spraying an adhesive into the wet-process shearing granulator, shearing, granulating and drying to obtain sodium alginate particles, and adding the sodium alginate particles into a nickel nitrate hexahydrate solution for reaction to obtain nickel alginate particles; and washing, drying and calcining to obtain the nickel oxide nanoparticles. The nickel oxide nanoparticles prepared by the method are of a cubic structure, and the particle size is about 30nm. The method is high in repeatability, is slightly interfered by external factors, and is also suitable for synthesizing other metal oxide nanoparticles.
Owner:SOUTH CHINA UNIV OF TECH

An enhanced boiling heat transfer test device and test method

The invention discloses a strengthened boiling heat transfer testing device and a testing method. The testing device comprises a condenser, a main container, a base and a heater, wherein the condenser is communicated with the main container, and the main container is arranged on a base; the main container comprises a glass container, screw rods, an upper cover plate covered on the top end of the glass container and a lower cover plate covered on the bottom end of the glass container, wherein the upper and lower cover plates respectively have through holes, the screw rods pass through the through holes of the upper and lower cover plates and are fixed with the upper and lower cover plates; the base comprises a ceramic base arranged in the base; the heater comprises a main heater and an auxiliary heater, the main heater is positioned on the middle position of the base, arranged on the ceramic base and is fixed with the through hole of the lower cover plate; the auxiliary heater is positioned in the main container and is arranged on the lower cover plate. The testing device and the testing method provided by the invention have the advantages that a sample is flexible to replace, the operation is convenient, the boiling state under high heat flux density is measured, testing effects in boiling under different structures are compared, and the test result is stable and reliable.
Owner:SOUTH CHINA UNIV OF TECH

Spiral fiber wrapped with perovskite quantum dots, and preparation method and device

The invention provides a spiral fiber wrapped with perovskite quantum dots, and a preparation method and device. The outside of the perovskite quantum dot fiber is a polymer fiber, and the inside of the perovskite quantum dot fiber is wrapped with the perovskite quantum dots. The preparation method comprises the following steps of: based on the hydrodynamic effect, designing a micro-fluidic device by utilizing the characteristics that perovskite quantum dots are separated out by solvent volatilization after reaction of a perovskite quantum dot precursor solution and a polymer solution is subjected to rapid phase inversion, and generating a spiral polymer fiber internally wrapped with the perovskite quantum dots. The flow velocity of each phase of fluid can be adjusted, the fluorescence wavelength of the fiber can be controlled, and fibers with different fluorescence, different diameters and different spiral sizes can be generated. The preparation method is simple to operate, low in cost and high in experiment repeatability, a perovskite quantum dot composite material can be generated under a low environment requirement, and the prepared fiber has the three-dimensional spiral morphology, is uniform in structure and controllable in size, can serve as a light-emitting material and is wide in application prospect.
Owner:NANJING DRUM TOWER HOSPITAL

Automatic electric-control gravity-type striker for constructing acute spinal cord injury animal model

ActiveCN102379752BPrecise timing strike processImprove accuracySurgical veterinaryOperabilityEngineering
The invention discloses an automatic electric-control gravity-type striker for constructing an acute spinal cord injury animal model, which is characterized in that the striker comprises a base, a support, a transverse beam, an electromagnetic striker and a control box used for controlling the electromagnetic striker to act; the support is vertically arranged on the base, a vertical guide rail is arranged on the support, the transverse beam is arranged on the vertical guide rail, and a transverse beam height adjusting mechanism which is used for driving the transverse beam to slide on the guide rail and locking the transverse beam on the guide rail is arranged on the transverse beam; and the electromagnetic striker is fixed at one end of the transverse beam. The automatic electric-control gravity-type striker for constructing the acute spinal cord injury animal model has the advantages that the operability is high and the secondary strike can be effectively avoided.
Owner:XIANGYA HOSPITAL CENT SOUTH UNIV

A Schottky diode based on indium aluminum zinc oxide and its preparation method

The invention relates to a Schottky diode based on indium aluminum zinc oxide and a preparation method thereof. The diode structure includes SiO arranged sequentially from bottom to top 2 / P + ‑Si substrate, metal electrode Ti, IAZO film and double-layer metal electrode Pd, double-layer metal electrode Pd includes the first layer metal electrode Pd and the second layer metal electrode Pd arranged in sequence from bottom to top, IAZO film and metal electrode The Ti is an ohmic contact, and the IAZO film and the double-layer metal electrode Pd are a Schottky contact. The present invention designs a kind of IAZO SBD with Schottky contact on the top for the first time. IAZO has a very wide forbidden band width and a wide range of bandgap modulation, which is beneficial to ensure the light stability of IAZO SBD device performance; the SBD has better Excellent electrical properties, can be prepared at low temperature, suitable for industrial production.
Owner:SHANDONG UNIV
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