34results about How to "Low requirements for experimental equipment" patented technology

The invention provides a bismuth ferrite nano-cylinder and a preparation method thereof. Bismuth nitrate and ferric nitrate are taken as raw materials, and the shape of the prepared bismuth ferrite nano-cylinder is controlled by regulating hydrothermal conditions such as key parameters of sodium hydroxide concentration, reaction temperature and time through a hydrothermal method. The bismuth ferrite nano-cylinder prepared through the simple hydrothermal method is 400-800 nanometers in diameter, and 100-400 nanometers in thickness. Compared with the prior art, the preparation method of the bismuth ferrite nano-cylinder provided by the invention is free from pollution, low in cost, simple in production process and easy for industrial production. The synthesized bismuth ferrite nano-cylinder has wide application prospects in the fields of information storage, sensors and microelectronics.

The invention relates to flake silver powder as well as a preparation method and application thereof.The preparation method comprises the following steps that S1, a silver source is dissolved in deionized water to prepare a solution containing silver ions, a reducing agent is dissolved in the deionized water to obtain a reducing agent solution, and the concentration range of the silver ions in thesolution containing the silver ions is 0.22 mol / L; S2, a pH regulating solution is prepared, the pH regulating solution is added into the solution containing the silver ions, and the pH value of thesolution is regulated to 8-12; S3, a dispersing agent is added into the solution containing the silver ions, and uniform stirring is carried out; S4, at the temperature of 20-60 DEG C, the solution containing the silver ions and the reducing agent solution are fully mixed and reduced in the stirring process to obtain silver particles, part of the reducing agent solution is added into part of the solution containing the silver ions in the mixing process, and after full reduction stirring, the remaining reducing agent solution and the solution containing the silver ions are added into a system at the same time; and continuous stirring and reduction are carried out until the reaction is finished, solid-liquid separation is carried out on the reaction liquid, washing and drying are carried outto obtain the flake silver powder. According to the preparation method, the particle size and the sheet diameter of the prepared silver powder are regulated and controlled, operation is easy, and different use requirements can be met.

The invention relates to a copper-nickel alloy nanowire / titanium dioxide composite material as well as a preparation method and application thereof. The copper-nickel alloy nanowire / titanium dioxide composite material comprises copper-nickel alloy nanowires and titanium dioxide granules which are grown on surfaces of the copper-nickel alloy nanowires in situ. The titanium dioxide granules are grown on the surfaces of the copper-nickel alloy nanowires by using a wet chemical method, so that the copper-nickel alloy nanowire / titanium dioxide composite material can be prepared, and the purposes that VOCs are effectively degraded and thus air is purified can be achieved when the copper-nickel alloy nanowire / titanium dioxide composite material is applied to photocatalytic acetaldehyde degradation under visible light.

The invention belongs to the technical field of phase change materials, and particularly discloses an organic phase change fluid material and a preparation method and application thereof. The method specifically comprises the following steps: (1) mixing an emulsifier, a nucleating agent, water and glycerol, adding nanoscale aluminum nitride and molybdenum disulfide, and performing uniform mixing to obtain a turbid solution; and (2) uniformly mixing the turbid solution obtained in the step (1) with a phase change material to obtain a fatty acid ester water-based emulsion, and cooling the fattyacid ester water-based emulsion to room temperature to obtain the fluid phase change material. The novel fluid phase-change material prepared by the invention is an emulsion, and since ester is used as the phase-change material, the latent heat of phase change is higher than that of other organic phase-change materials, the stability is better, the heat conductivity is higher, and the heat conductivity coefficient is 0.3-1.4W / m / DEG C. The preparation process is simple, has low requirements on experimental apparatuses, is easy to control and can be widely applied to the field of heat storage and transfer.

The invention discloses a graphite carbon / ferroferric oxide composite and a preparation method and application thereof. The composite is spherical particles of a core-shell structure, and in the spherical particles of the core-shell structure, ferroferric oxide particles are adopted as cores, and graphite carbon is adopted as shells. The preparation method comprises the following steps that, 1, ferrous gluconate and Pluronic F127 are added to deionized water to be mixed, and a solution I is obtained; 2, polyetherimide is added to the solution I to be mixed evenly, a solution II is obtained, and the solution II is dried to obtain solid powder; 3, in the inert atmosphere, the solid powder is annealed, and the graphite carbon / ferroferric oxide composite is obtained. The preparation process is simple and convenient, operation is easy, the preparation period is short, the requirement for experiment equipment is low, the graphite carbon / ferroferric oxide composite is suitable for volume production, and the prepared graphite carbon / ferroferric oxide composite has excellent electrochemical performance and can be used for lithium ion battery anode materials.

The invention discloses an RT-LAMP detection kit and a detection method of infectious myonecrosis viruses, wherein the kit consists of a mixed solution of outer primers F3 and B3 and inner primers FIP and BIP; and nucleotide sequences of the primers F3, B3, FIP and BIP are separately shown as SEQ ID NO.1, SEQ ID NO.2, SEQ ID NO.3 and SEQ ID NO.4. According to the detection method, an RT-LAMP detection system is used for detecting whether a sample contains the infectious myonecrosis viruses or not. The method is simple and convenient to operate and is relatively low in requirement on experimental instruments, and the method can be completed in a normal constant-temperature water bath kettle within 60min; moreover, by virtue of a method of adding a dye to a final product and by directly observing a result with naked eyes, the method can rapidly and accurately identify the infectious myonecrosis viruses; and the method has a broad popularization and application prospect in prawn aquaculture.

The invention discloses a method for synthesizing copper nanowire gel by a one-pot method. For a long term, the research on a negative electrode of a traditional lithium battery industry mostly concentrates on a negative electrode material, but the research on a copper foil which is related to the negative electrode material and is used as a negative material current collector is quite scarce. The negative electrode copper foil of a traditional lithium battery only has one function of serving as the current collector, and is slightly inadequate in space of the battery and cost, therefore, the copper foil is enabled to have double functions by using the point, i.e., a new innovation of the copper foil for serving as the current collector and participating in lithium battery reaction like the negative electrode material is realized. The invention relates to a copper nanowire elementary substance; the copper nanowire elementary substance is prepared into the copper foil by using a sheet pressing machine, thus obtaining a negative electrode current collector of a lithium battery; by a performance test of the lithium battery, the material is found to remarkably enhance the capacity of the lithium battery; the first-time charge and discharge capacity reaches 1800mAhg<-1>; besides, the stability is more excellent; the copper foil has significant advantage in comprehensive performance compared with that of a commercial copper foil serving as the negative electrode current collector of the lithium battery.

The invention discloses a magnetic graphene oxide composite material, belonging to carbon matrix composite materials, in particular relates to a preparation method and application of the magnetic graphene oxide composite material. The preparation method of the magnetic graphene oxide composite material comprises the following steps: dispersing graphite oxide and ferric salt into a solution for ultrasonic mixing; then adding a cross-linking agent; after filtration and washing, putting into an alkyl xanthic acid saline solution; after filtration, washing and drying to obtain the material. The magnetic graphene oxide composite material is used for removing heavy metal ions and / or organic pollutant in the water. In conclusion, the preparation method provided by the invention is simple, safe and environment-friendly, is low in price and adopts easily available raw materials, and is easy to carry out industrial production. The prepared composite material has high adsorption efficiency on heavy metal ions and organic pollutant in water and strong capacity of resisting disturbance, can carry out multicomponent adsorption at the same time, is high in recycle utilization rate and is suitable for industrialization popularization and application.

The invention mainly relates to a method for detecting a high-temperature melting capability of chromium ore and a test sample assembly, and belongs to the technical field of metallurgy. The method comprises the following detection steps: (1) finely grinding the chromium ore until the size is 0.074mm or below; then carrying out cold pressing molding on the chromium ore to form a cylindrical test sample with a certain diameter and height; 2) putting the cylindrical test sample into a high-temperature furnace according to a structure of a corundum gasket+a quartz gasket+a test sample; 3) introducing constant flow of reducing gas into the high-temperature furnace and heating and roasting according to a pre-set heating speed; continuously photographing in a heating process and recording real-time temperature; when the softening percentage (the specific value of test sample height to original test sample height under temperature T) of the chromium ore is 90 percent, determining that the temperature is temperature at which the chromium ore starts to melt. The method provided by the invention is simple in technological process and high in operability; a detection result can be used for analyzing the melting capability of the different chromium ores.

The invention discloses a rare earth-N,N'-(2-hydroxyl-3-methoxyl benzyl)ethylenediamine complex single crystal. The invention also discloses a method for preparing the rare earth-N,N'-(2-hydroxyl-3-methoxyl benzyl)ethylenediamine complex single crystal, which is characterized in that rare earth ions, namely Tb<3+> or Pr<3+> or Er<3+>, are dissolved in ethanol first, and N,N'-(2-hydroxyl-3-methoxyl benzyl)ethylenediamine is added into the mixture for reaction, wherein the mass ratio of the rare earth ions to the N,N'-(2-hydroxyl-3-methoxyl benzyl)ethylenediamine is 2:1. The method for preparing the complex single crystal has simple technique and low requirements on experimental equipment, and a prepared complex has definite compositions and molecular structure.

The invention discloses a double-gun jointly spraying composite film preparation technology based on immiscible function materials. Immiscible film material liquids are sprayed to the surface of the same target device by different spray guns respectively to form a composite film. The composite film preparation technology based on two immiscible function materials has the advantages that organic and inorganic materials which cannot be composited into a film with a conventional technology of film formation from solutions can be combined in a standard gaseous state and a dispersed state, so that an organic and inorganic material composite film is formed through deposition. The method can be used for preparing the organic and inorganic material composite film and can also be used for ordinary film formation, large-area film formation, film formation of a device with a complicated structure, film formation of a flexible material and various film formation forms such as chemical reaction film formation, physical deposition film formation and the like.

The present application discloses a method for preparing carbon-coated lithium iron phosphate material, which is characterized in that a one-pot synthesis method is adopted, at least including the following steps: a) the mixture containing melamine compounds, lithium source and iron source is ground to obtain Precursor I; b) adding phosphoric acid to precursor I, grinding to obtain precursor II; c) vacuum drying and ball milling precursor II to obtain precursor III; d) placing precursor III in an inert atmosphere After segmental calcination, the carbon-coated lithium iron phosphate material is obtained. The method adopts a one-pot synthesis method, and is obtained through one-step reaction synthesis. The reaction conditions of the method are simple and controllable, the requirements for experimental equipment are not high, the environment is friendly, and the product yield is high. The obtained carbon-coated lithium iron phosphate (LiFePO 4 / C), the electrochemical performance of the material is effectively improved by carbon coating. The production process of the method is simple, and it is easy for industrial scale-up and commercialization.

The invention relates to the technical field of biomedicine, in particular to PF-127-miRNA-615 agomir complex and a preparation method and application thereof, wherein the PF-127-miRNA-615 agomir complex is made by covering miRNA-615 agomir with Pluronic F-127 hydrogel. A transporter capable of carrying miRNA-615 agomir and filling crack damage is provided, precise transport and local slow release of miRNA-615 agomir are achieved, and three-dimensional space and mechanical supporting capacity can be provided for the growth of neural axons. Therefore, the PF-127-miRNA-615 agomir complex can vigorously promote nerve regenerative repair for brachial plexus root avulsion, and new treatment routes are provided for central and peripheral nerve injury.

The invention discloses a method for synthesizing copper nanowire gel by a one-pot method. For a long time, most of the research on the negative electrode of the traditional lithium battery industry has been concentrated on the negative electrode material, and related to the negative electrode material, copper as the current collector of the negative electrode material Foil research is quite scarce. Traditional lithium battery negative electrode copper foil only undertakes the function of current collector, which is slightly insufficient for the battery's own space and cost. Therefore, it is a new innovation to use copper foil to make it have a dual function, that is, it can not only assume the role of current collector, but also participate in the lithium battery reaction like the negative electrode material. The invention relates to a simple substance of copper nanowires, which is pressed into copper foil by a tablet press to make a negative electrode current collector of a lithium battery. It is found through lithium battery performance tests that the material can significantly enhance the capacity of the lithium battery, and it can be charged and discharged for the first time. The capacity has reached 1800mAhg ‑1 , and the stability is also excellent. The overall performance has obvious advantages over commercial copper foil used as lithium battery anode current collector.

The invention discloses a full-oxide lead-free ferroelectric photovoltaic device with a sandwich structure and a preparation method thereof. The photovoltaic device comprises a substrate, wherein thesubstrate is covered with a BFO layer, the BFO layer is covered with an ITO layer, and the BFO layer is a BiFeO3-delta film which grows in an epitaxial mode. The photovoltaic device is advantaged in that oxygen vacancy doping is ingeniously utilized to increase light absorption efficiency of a ferroelectric layer, and the built-in potential caused by the work function difference between the upperelectrode and the lower electrode is utilized to cooperate with the ferroelectric depolarization field, and thereby separation of photo-induced electron hole pairs is effectively promoted, and photoelectric conversion performance of the device is improved.

The present invention discloses a hydrothermal synthesis method of LuO (OH) nanorods and Lu2O3 nanorods luminescent powder and relates to the rare earth nanometer material preparation and the microstructural regulation and control thereof. The method comprises the following steps: adopting commercial rare earth oxides (lutecium oxide and europium oxide) as raw materials, firstly dissolving the raw materials in concentrated nitric acid to prepared certain concentration lutecium nitrate doped with europium nitrate, then reacting with sodium hydroxide to prepare precipitate, then performing hydrothermal reaction in a sealed reaction tank at 160-200 DEG C to synthesize LuO(OH) nanorods; calcining LuO(OH) nanorods at 600-1000 DEG C for 1-3h and obtaining the corresponding Lu2O3 nanorods. The method process is simple and easily controllable and the feature of the product can be controlled within a certain concentration range of NaOH by adjusting the concentration of mineralizer NaOH in the hydrothermal process.

The invention discloses a naphthalene ring-aminopyrimidine type compound, a preparation method and application thereof, and belongs to the technical field of preparation of new drug compounds. The preparation method disclosed in the present invention comprises: 1-methoxynaphthalene and substituted phenylacetic acid are prepared by acylation reaction to obtain 1-(4-methoxynaphthalene-1-yl)-2-substituted phenylethane-1-one , and then react with DMF-DMA to obtain (E)-3-(dimethylamino)-1-(4-methoxynaphthalene-1-yl)-2-substituted phenyl prop-2-ene-1- Ketone, finally obtains the naphthalene ring-amino pyrimidine type compound (I) shown in the general formula (I) in the ring-closing reaction with guanidine hydrochloride and potassium carbonate. The naphthalene ring-aminopyrimidine type compound of the present invention has a good activity of inhibiting tubulin polymerization, and can effectively inhibit the proliferation activity of human breast cancer MCF-7 cells, and can be used as a leading compound for novel antitumor drug research, and is suitable for the market promotion and application.

The invention relates to an LAMP detection method of utilizing mitochondrial DNA to identify sable meat in beef and mutton and belongs to the technical field of molecular biological detection. The LAMP detection method includes: taking DNA of a to-be-detected meat product as a template, and taking DAF3, DAB3, DAFIP and DABIP as primers to build an LAMP detection system; putting the LAMP detection system into a water bath at constant temperature of 64 DEG C for LAMP reaction for 40min, and adding 1uL of fluorescent dye SYBR GREEN I into reaction liquid after the reaction is finished; if the reaction liquid becomes green, determining that the to-be-detected meat product contains the sable meat; if the reaction liquid becomes orange, determining that the to-be-detected meat product does not contain the sable meat. Compared with conventional PCR, the LAMP detection method has the advantages that detection can be completed only through reaction for 40min in a common constant-temperature water bath, and results can be directly observed by naked eyes through a method of adding the dye into a final product, so that animal-origin components can be identified quickly and accurately; the LAMP detection method has the advantages of simplicity and convenience in operation, low requirement on experimental instrument and easiness in result determination.

The preparation method comprises the following steps: sawing and tenoning a log material, smearing a wood adhesive prepared by taking meta-kaolin as a geopolymer raw material, taking styrene-acrylic emulsion as doped modified resin and taking silane as a coupling agent, and carrying out post-treatment such as pressurizing and cementing to obtain the formaldehyde-free environment-friendly laminated wood. The adhesive layer shearing strength of the product can reach up to 4.9 MPa, the strength is high, the adhesive cost of the laminated wood is reduced, the environmental protection requirement of zero formaldehyde release is met, sustainable development is met, the product can be used as a furniture material, a floor, a wall decorative plate and the like, and the product has important significance on the artificial board industry and has high industrial value.

The invention discloses a graphite carbon / ferroferric oxide composite and a preparation method and application thereof. The composite is spherical particles of a core-shell structure, and in the spherical particles of the core-shell structure, ferroferric oxide particles are adopted as cores, and graphite carbon is adopted as shells. The preparation method comprises the following steps that, 1, ferrous gluconate and Pluronic F127 are added to deionized water to be mixed, and a solution I is obtained; 2, polyetherimide is added to the solution I to be mixed evenly, a solution II is obtained, and the solution II is dried to obtain solid powder; 3, in the inert atmosphere, the solid powder is annealed, and the graphite carbon / ferroferric oxide composite is obtained. The preparation process is simple and convenient, operation is easy, the preparation period is short, the requirement for experiment equipment is low, the graphite carbon / ferroferric oxide composite is suitable for volume production, and the prepared graphite carbon / ferroferric oxide composite has excellent electrochemical performance and can be used for lithium ion battery anode materials.