37results about How to "Simple technological advancement" patented technology

The invention provides a method for preparing a graphene/carbon nanotube/carbon nanofiber membrane ternary composite capacitive demineralization electrode. The method comprises the steps of adding polyacrylonitrile into a well-dispersed graphene oxide and carbon nanotube N,N-dimethylformamide solution, carrying out stirring at a certain temperature so as to prepare a spinning solution, then, preparing a composite film by using an electrostatic spinning technology, and carrying out high-temperature annealing and carbon dioxide activating, so as to obtain a graphene/carbon nanotube/carbon nanofiber membrane ternary composite film. The film obtained by the method can be directly used as the capacitive demineralization electrode. The method provided by the invention is simple, a binder is not required, the prepared electrode material has a flexible characteristic, the assembly is facilitated, and the requirements on environment-friendliness are met; the prepared ternary composite material has a unique microstructure and good electric conductivity, the demineralization performance can be effectively improved, and thus, the ternary composite material has a potential development prospect.

The invention provides a preparation method of a visible light catalyst. The preparation method comprises the following steps: weighing tetrabutyl titanate, ethanol, hydrazine hydrate and AgNO3, dispersing the tetrabutyl titanate in the ethanol, adding N2H4.H2O, ultrasonically dispersing in icy water bath for 0.5 to 1.5 h, forming TiO2 precursor sol, transferring the TiO2 precursor sol into a hydrothermal kettle, adding AgNO3 into the hydrothermal kettle at an ultrasonic state, reacting for 6 to 10 h at 160 to 200 DEG C, and obtaining the anatase TiO2/Ag visible light catalyst. Oxygen vacancyformed inside the TiO2 prepared by virtue of the reduction of N2H4.H2O is synergistic with Ag, so that the absorption spectral range of a sample is enlarged, the propagation rate and separation efficiency of photon-generated carrier can be improved, and the visible light catalytic efficiency can be increased. The oxygen vacancy is separately formed inside TiO2 and nano silver corresponding to thevisible light is carried on the surface of TiO2 by virtue of in-situ reduction reaction, and the preparation method is simple and easy to control.

The invention provides a preparation method of a conductive carbon material with a hierarchical porous structure. The method comprises: dissolving phenolic resin into an ethanol solution; dissolving a surface active agent F127 into an HCl-containing ethanol solution; then adding ethyl orthosilicate, silicon dioxide colloidal particles and the phenolic resin ethanol solution; transferring a mixture into a container, volatilizing ethanol, performing thermal polymerization in a reaction furnace of 100 DEG C to obtain a faint-yellow transparent thin film, and grinding the thin film into powder; putting the powder into a tubular muffle furnace, and performing carbonization under the nitrogen atmosphere protection; soaking a hierarchical porous structure carbon/silicon oxide composite material into HF of which the content is 5wt%, removing silicon oxide, only retaining carbon components of the hierarchical porous structure, washing a sample by using deionized water, and then performing drying to obtain the conductive carbon material with the hierarchical porous structure. According to the preparation method of the conductive carbon material with the hierarchical porous structure, the internal resistance of a lead acid battery electrode can be effectively reduced, and the utilization rate of active substances and the charge-discharge rate are improved; meanwhile, the electrode structure can be stabilized, and the recycling life is prolonged.

The invention provides a coaxially split dual-core containing microfluid control nozzle comprising a chief capillary tube, a first bending capillary tube and a second bending capillary tube; the first bending capillary tube and a second bending capillary tube are arranged inside the chief capillary tube side by side; the bending end of each of the first bending capillary tube and the second bending capillary tube goes through from the side surface of the chief capillary tube; the other end of each of the first bending capillary tube and the second bending capillary tube goes through from an outlet end of the chief capillary tube. The invention also discloses a high voltage electrostatic spinning device applying the nozzle; the spinning device comprises a first syringe pump, a first injection syringe, a second syringe pump, a second injection syringe, a third syringe pump, a third injection syringe, a silica gel flexible pipe, a fiber receiving plate and a high pressure generator. An enforcement method of preparing coaxially split dual-core containing structural nanometer fiber is also provided; under high voltage electrostatic field, high voltage electrostatic spinning technology is carried out to effectively prepare nano fiber having complex structural features containing the coaxially split dual-core.

The invention provides a high-viscosity benzyl silicone oil, which comprises 30-60 parts of diphenyldimethoxysilane; 40-70 parts of dimethyldiethoxysilane; 0.06- 0.12 parts of hydrochloric acid solution; 30-30.5 parts of water; 0.42-0.56 parts of tetramethylammonium hydroxide silicon alkoxide. The present invention also provides a method for preparing the above-mentioned high-viscosity benzyl silicone oil. The high-viscosity benzyl silicone oil of the present invention has high viscosity and high refractive index, and can be applied to many fields such as the preparation of silicone grease, low-temperature lubricating oil, shock absorption of precision instruments, special radiation protection high heat carrier for nuclear power plants, and sealing under continuous high temperature.

The invention provides a preparation method for a positive electrode material lithium cobalt iron phosphate for a lithium ion battery. The chemical formula of lithium cobalt iron phosphate is LiFe<x>Co<1-x>PO<4>/C, wherein x is greater than or equal to 0.1 and less than or equal to 0.2; the preparation method comprises the steps of adding phosphoric acid into deionized water to prepare a phosphoric acid solution; adding reduced iron powder under a stirring state, enabling the mixture to be reacted to obtain a clear mixed solution; adding a lithium hydroxide solution to the mixed solution; after the solution is cooled, adding the cooled solution to a nanometer ball mill, and adding cobalt hydroxide; carrying out ball milling on the mixture, and then adding a caramel solution, stirring uniformly the ball-milled product, and spraying and drying the product to obtain a spherical lithium cobalt iron phosphate/carbon composite material precursor powder; and calcining the precursor powder at a temperature of 600-700 DEG C under a nitrogen atmosphere to obtain the positive electrode material for the lithium ion battery. The positive electrode material for the lithium ion battery obtained by the invention has relatively high energy density and high cycle performance, and can be expected to be the new generation of high-energy-density positive electrode material for the lithium ion battery.

The invention provides a dendrobium leaf-containing composition with a postprandial blood sugar reducing function. The dendrobium leaf-containing composition is prepared from the following raw materials in parts by weight: 1 to 3 parts of freeze-dried powder of a dendrobium leaf hydrolysate, 1 to 3 parts of freeze-dried powder of hericium erinaceus hydrolysate, 1 to 3 parts of freeze-dried powderof plumula nelumbinis, 1 to 3 parts of freeze-dried powder of fructus crataegi and 1 to 3 parts of a sweet and sour taste regulator. The invention also provides a preparation method of the dendrobiumleaf-containing composition. The preparation method comprises the following steps: carrying out hydrolysis and freeze drying on cellulase and pectinase of the dendrobium leaves; carrying out the hydrolysis and the freeze drying on the cellulase of hericium erinaceus; carrying out the freeze drying on the plumula nelumbinis and the fructus crataegi; mixing all the materials in proportions, thus preparing the dendrobium leaf-containing composition. A product prepared by the invention is capable of effectively reducing the postprandial blood sugar, all the materials are medicinal and edible materials, and the product can be taken for a long term, is safe and has a good taste. Meanwhile, a utilization range of the dendrobium leaves is broadened, other parts besides stems are fully developed and utilized, and the utilization rate of a dendrobium plant is increased.

A Pingyin rose essential oil GC chromatographic method comprises the following steps: dissolving Pingyin roses into n-hexane, injecting n-hexane into a gas chromatograph, wherein the gas chromatography detection conditions are as follows: chromatographic column: HP-INNOWax elastic capillary column, injection port temperature: 250 DEG C, detector temperature: 250 DEG C, carrier gas: nitrogen, flow velocity: 0.5 mL/min, and split ratio: 100:1; carrying out temperature programming: maintaining the primary temperature (80 DEG C) for 5 minutes, raising the temperature to 220 DEG C at a speed of 2 DEG C/min, maintaining the temperature for 20 minutes; wherein the injection amount is 0.2 [mu]L, the appearance time of citronellol is 47.917 minutes, the appearance time of nerol is 49.653 minutes, and the appearance time of geraniol is 52.061 minutes; after the instrument becomes stable, calculating the contents of main components of Pingyin rose essential oil. The provided method can accurately measure the main components and contents of Pingyin rose essential oil. Moreover, the service life of the chromatographic column is long.

The invention provides an aluminum-air battery electrolyte compound additive, which is prepared from adipic acid and zinc oxide, wherein the molar ratio of the adipic acid to the zinc oxide is (0.5-5.0) to (0.1-1.0). The invention further provides an aluminum-air battery electrolyte. The aluminum-air battery electrolyte is prepared from sodium hydroxide, the adipic acid, the zinc oxide and water; in the electrolyte, the concentration of the sodium hydroxide is 4M; the concentration of the adipic acid is 0.5-5.0mM; the concentration of the zinc oxide is 0.1-1.0mM; and the remainder is water. The invention further provides a preparation method of the aluminum-air battery compound electrolyte. The method can effectively inhibit hydrogen-evolution self-corrosion of an aluminum alloy anode, can negatively shift an open circuit potential of the aluminum alloy anode; in a constant-current discharge test, the aluminum alloy anode has good discharge performance, meets the discharge requirements of an alkaline aluminum-air battery and has a good development prospect.

The invention discloses a method for preparing BiOCuS nanosheets by adopting concentrated alkali hydrothermal method. The preparation method comprises the following steps: firstly, sequentially adding reactant precursor sulfur-containing compound, copper oxide or soluble copper salt, bismuth oxide or soluble bismuth salt, strong base and deionized water into a reaction kettle, stirring at room temperature until the reactants are dissolved, and then sealing the reaction kettle and placing the kettle into a vacuum oven at 180-240 DEG C, allowing the raw materials to react for 1-5 days, and finally centrifuging and drying to obtain the BiOCuS nanosheets. The method disclosed by the invention is simple to operate, the preparation is easy, the element stoichiometric ratio is controlled accurately, and the used precursor material is low in cost without toxicity, and the prepared nanosheets can be used as superconducting materials.

The invention discloses a method for determining corresponding retained austenite content during bearing steel material thermal processing. The method includes: measuring the corresponding specific volume of a to-be-determined bearing steel material under different thermal processing states, performing an X-ray experiment on the bearing steel test sample obtained through electrolytic polishing and sample preparation to obtain the retained austenite content, and using the retained austenite content as the horizontal coordinate and the specific volume of the to-be-determined bearing steel material as the longitudinal coordinate to build a relationship, namely a working curve, between the retained austenite content and the specific volume of the to-be-determined bearing steel material; quantitatively determining the corresponding retained austenite content of the to-be-determined bearing steel material under one thermal processing state according to the obtained working curve and the position of the specific volume of the to-be-determined bearing steel material in the working curve or by comparing the specific volume under different thermal processing states. The method is simple in test sample preparation, universal in measuring instrument, convenient to operate, high in experiment data precision, high in repeatability, reliable in data, and the like.

The invention discloses a preparation method of 2-hydroxyacetophenone. The preparation method comprises the steps: weighing phenol and acetyl chloride with the molar ratio of phenol to acetyl chloride of 1 to (1.0-1.5), adding phenol and acetyl chloride to a first organic solvent for reaction, carrying out a reaction at the temperature of 20-30 DEG C, then washing with a weak base, and drying and spin-drying to obtain phenyl acetate; adding Lewis acid and an ionic liquid in phenol acetate, wherein the mass of the ionic liquid is 3-10 times that of phenyl acetate, and the reaction temperature is 120-160 DEG C; hydrolyzing the obtained product with a hydrochloric acid solution, and extracting with a second organic solvent; and concentrating an organic layer, then adding a third organic solvent with the volume 1-2 times that of the organic layer, freezing the organic layer, filtering, repeating the operations for 2-3 times, and distilling the obtained filter cake to obtain the product 2-hydroxyacetophenone. The adopted raw materials are low in price, the experimental conditions are mild, the yield is high, the ortho-para ratio can reach 3.55:1, and the preparation method has a great application value in production.

The invention discloses escherichia coli O157:H7 direct type immunofluorescence chromatography test paper. The test paper comprises a supporting layer which is provided with an adsorption layer. A protective layer is arranged on the adsorption layer. The adsorption layer is composed of an adsorptive fiber layer, a cellulose membrane layer and a water absorption material layer, one end of the adsorptive fiber layer is closely connected with one end of the cellulose membrane layer, the other end of the cellulose membrane layer is closely connected with the water absorption material layer, and a detection line is arranged on the cellulose membrane layer and is composed of monoclonal antibodies or polyclonal antibodies composed of escherichia coli O157:H7. The invention further provides a method for preparing the chromatography test paper. The test paper and a detection method are simple, high in specificity, high in sensitivity, visual, accurate and capable of being used for performing qualitative and semi-quantitative detection, the trace contamination of the lowest 1CFU/mL can be detected, the application range is wide, cost is low, and the test paper and the detection method are easy to apply and popularize.

The invention provides a preparation method of pure-phase bismuth ferrite. The method comprises a step of preparing a precursor liquid. Fe(NO3)3.9H2O and Bi(NO3)3.5H2O are dissolved in a solvent to obtain the precursor liquid with the metal ion concentration being 0.2 mol/L. Ammonia water is mixed with a ammonium bicarbonate solution to obtain a precipitating agent. In magnetic stirring, the precursor liquid is uniformly added to a precipitating agent solution dropwise till the pH value of a titration final point is controlled in 9-10. After titration is completed, stirring is continuously carried out to obtain a precipitate. The precipitate is allowed to stand and age, filtration is carried out, and the obtained product is washed with deionized water and absolute ethyl alcohol and is dried to obtain precursor powder. The precursor powder is put in a muffle furnace, the temperature is raised for calcination, and the obtained product is cooled to obtain pure-phase bismuth ferrite powder. The preparation method and the equipment are simple, and the pure-phase bismuth ferrite can be prepared in a large amount at one time. The preparation method is free of organic solvent and is green and eco-friendly, and the pure-phase bismuth ferrite is complete in crystallization and uniform in powder size.

The invention provides a ginkgo fruit and ganoderma lucidum concentrated solution. The ginkgo fruit and ganoderma lucidum concentrated solution is prepared from raw materials in parts by weight as follows: 1-3 parts of a ginkgo fruit hydrolysate, 1-3 parts of a ganoderma lucidum hydrolysate and 0.5-2 parts of sugar acid taste regulatory substances. The invention also provides a preparation methodof the ginkgo fruit and ganoderma lucidum concentrated solution. The preparation method comprises the steps as follows: preparing a ganoderma lucidum sporocarp cellulase hydrolysate; pretreating ginkgo fruits; hydrolyzing the treated ginkgo fruits with amylase and pectinase; compounding the ganoderma lucidum hydrolysate and the ginkgo fruit hydrolysate; and performing vacuum concentration to obtain the ginkgo fruit and ganoderma lucidum concentrated solution. The ganoderma lucidum and the ginkgo fruits are matched and complementary in nutrients and functions, the healthcare function is enhanced, and on the other hand, the absorption and utilization rates of polysaccharides in the ginkgo fruits and cellulose substances in the ganoderma lucidum are increased. Meanwhile, triterpene substancesin the ganoderma lucidum and flavonoid substances in the ginkgo fruits have antibacterial and anti-oxidation functions, and the expiration date is prolonged in the absence of a preservative and an antioxidant.