18results about How to "Simple preparation conditions" patented technology

The invention discloses a preparation method and application of a high-temperature-resistant and high-pressure-resistant water environment composite coating. According to the method, SiO2 serves as a pretreatment layer (providing binding force between a coating and a substrate), silicon resin serves as a main resin framework, a high-temperature-resistant organic resin material serves as nano particles (serving as a secondary resin framework after sintering), zirconium and cerium composite oxide nano particles serve as a high-temperature corrosion inhibitor, and the high-temperature corrosion inhibitor is prepared. And an isocyanate polymer is used as a cross-linking curing agent of the components to prepare the high-temperature-resistant and high-pressure-resistant water environment coating after high-temperature sintering. The coating disclosed by the invention can be coated on metal substrates such as low-carbon steel, stainless steel, aluminum alloy and copper alloy, so that the metal substrates can resist corrosion in a high-temperature and high-pressure water environment. And after the coating is cured and sintered, the surface is smooth and has certain hydrophobicity.

The invention discloses a carbon-coated silicon-based composite material and a preparation method thereof.The preparation method comprises the steps that firstly, a silicon monoxide material and a lithium source liquid phase are mixed in the mode of solvent evaporation after liquid phase mixing, and a layer of lithium silicate precursor is evenly distributed on the surfaces of silicon monoxide particles through high-temperature sintering; and mixing the carbon-coated silicon-based composite material with an organic resin liquid phase, and carrying out high-temperature carbonization to obtain the carbon-coated silicon-based composite material. The invention also discloses an application of the carbon-coated silicon-based composite material as a lithium ion battery negative electrode material. The carbon-coated silicon-based composite material prepared by the method disclosed by the invention has relatively high first coulombic efficiency and excellent cycle performance and rate capability, and the method disclosed by the invention is simple in preparation process and further has the characteristic of industrialization.

The invention discloses a preparation method and application of a porous para-aramid nanofiber membrane. The preparation method of the para-aramid nanofiber membrane comprises the following steps: placing a substrate coated with an aramid nanofiber solution in an aprotic solvent to obtain an aramid nanofiber membrane containing the aprotic solvent; and immersing the aramid nanofiber membrane containing the aprotic solvent into a protic solvent, replacing the aprotic solvent in the nanofiber membrane with the protic solvent, and heating and drying to obtain the para-aramid nanofiber membrane. The para-aramid nanofiber membrane prepared by the preparation method of the para-aramid nanofiber membrane has highly adjustable porosity and pore structure, and has a huge application prospect in the fields of battery diaphragm and membrane separation and the like, and the preparation method is simple and suitable for large-scale industrial application.

The present invention discloses a portable hydrogen generating device based on water free radical cations, and the technical scheme thereof is as follows: comprising a housing, a power source, a reaction chamber with an air inlet and an air outlet, a benzene generator for generating a benzene gas flow, and a deionized water generator for generating a deionized water gas flow, wherein the benzene generator and the deionized water generator are both connected to the air inlet of the reaction chamber, an anode plate and a cathode plate are respectively provided on both sides of the reaction chamber, a plurality of corona needles arranged toward the cathode plate are provided on the anode plate, and the anode plate and the cathode plate are both connected to the power source. Compared with the prior art, the hydrogen generating device of the present invention is easy to use, the conditions required for the preparation of hydrogen are simple, the hydrogen production concentration is high, the energy consumption is low, dry burning does not occur, and the safety is good.

The invention belongs to the technical field of coagulants, and discloses a titanium gel coagulant, a composite titanium salt coagulant, a preparation method and application, the titanium gel coagulant is a TiCl4-ethanol-acetylacetone-water mixture, and the composite titanium salt coagulant is a composite preparation formed by compounding the titanium gel coagulant with a coagulant aid. The titanium gel coagulant and the composite titanium salt coagulant have the characteristics of low material price, simplicity in synthesis, good turbidity removal effect and the like, in addition, the titanium gel coagulant and the composite titanium salt coagulant not only enrich the research content of the coagulant, but also provide a new technical choice for the field of water treatment, and are stable in property and suitable for industrial production. The long-term storage and use can be realized.

The invention discloses an anthryl-derived triphenyl quaternary phosphonium salt compound and application thereof, and particularly relates to a compound shown as a formula I or pharmaceutically acceptable salt thereof, wherein variables of the compound are defined in the specification. The compound disclosed by the invention shows a good killing effect on various cancer cells. In addition, the compound provided by the invention has the advantages of cheap and easily available raw materials, remarkable anti-cancer effect and suitability for large-scale preparation. # imgabs0 #

The invention belongs to the technical field of oil-gas field development, and relates to a CO2 slow response type gel for an ultra-high-temperature oil reservoir and a preparation method of the CO2 slow response type gel. The invention relates to a CO2 slow response type gel for an ultra-high temperature oil reservoir. The CO2 slow response type gel comprises an anionic surfactant, a cross-linking agent, a thiourea auxiliary agent and water. The CO2 slow response type gel for the ultra-high-temperature oil reservoir is relatively low in viscosity before being in contact with CO2, and can be well injected into a deep stratum, so that the swept area is enlarged; and after CO2 is introduced, at the temperature of 140 DEG C or above, after 5 hours, cross-linking is performed to form a three-dimensional network structure, the volume expansion viscosity is increased, and good viscoelasticity is achieved, so that the stratum is better blocked.

The present application relates to a kind of preparation methods of perovskite film, comprising the following steps: mixing imidazolium ionic liquid and lead halide in container according to the proportion of 1:1, adding DMF or DMSO solvent, heating and stirring, then adding first solvent and precipitating white precipitate, drying white precipitate to obtain white powder. White powder is mixed with at least one of MAI, FAI, CsI cation salt and second solvent, to configure perovskite precursor solution, after heating and stirring, filtering, placing filtrate in oven, to obtain perovskite crystal material. Perovskite crystal material is placed in tank, then methanamine vapor is introduced, to obtain perovskite intermediate, then the perovskite intermediate is dissolved in acetonitrile, to obtain acetonitrile mixed solution. Acetonitrile mixed solution is spin-coated or blade-coated on substrate, to obtain perovskite film layer. The present application also discloses perovskite assembly prepared by the method. The present application can prepare perovskite film in air environment without annealing treatment.

The application belongs to the field of organic synthesis and particularly relates to a synthesis method of substituted silabicyclo[4.1.0]heptan-2-one derivatives. The method comprises the following steps: pyridine N-oxide mediates intramolecular radical tandem cyclization reaction of 1,6-silabenzyne compounds to obtain silabicyclo[4.1.0]heptan-2-one derivatives. The reaction condition of the application is mild and simple, only needs to add a catalytic amount of non-metal photocatalyst, does not need to add other metal catalysts and ligands; and the reaction does not need strict anhydrous and anaerobic conditions, is easy to operate, has a relatively short reaction time, the product is easy to separate and purify, and has a relatively high yield.

The invention provides a preparation method and application of a citric acid modified Cd-MOF material, and belongs to the technical field of metal organic framework materials. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) is synthesized by adopting a chemical grafting and steam diffusion method, and the adsorption performance and the reusability of the citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) are systematically researched. Parameters such as concentration, dosage, pH and the like of citric acid are associated, the adsorption effect of the citric acid on heavy elements in a portable solution is investigated, and the adsorption capacities of the citric acid on anionic dye Congo red (CR) and heavy metal ions (Cu < 2 + >) are as high as 900.9 and 287.4 mg.g <-1 > respectively. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) obtained by the invention has the characteristics of being simple, green, environment-friendly and reusable, has excellent adsorption performance, and can be used for simultaneously removing organic dye and heavy metal ion pollution in water.

The invention relates to high-purity cordierite ceramic powder and a preparation method thereof. The preparation method of the high-purity cordierite ceramic powder comprises the following steps: (1) preparing high-purity and high-reactivity MgO powder, Al2O3 powder and SiO2 powder according to chemical components of cordierite, mixing, drying and screening to obtain mixed raw material powder; (2) carrying out primary high-temperature reaction on the mixed raw material powder at 1200-1400 DEG C to reduce the sintering activity of the powder, cooling, and carrying out dry pressing to obtain a biscuit block; (3) carrying out secondary high-temperature reaction on the biscuit block at 1450-1460 DEG C so as to enable the interior of the biscuit to be partially molten and generate a liquid phase, and cooling to obtain a loose and breakable high-purity cordierite block; and (4) crushing the high-purity cordierite block to a target particle size to obtain the high-purity cordierite ceramic powder.

This application provides a method for preparing decellularized pericardium, employing a combination of specific pretreatment, sterilization, defatting, decellularization, and freeze-drying processes. This method effectively removes antigenic substances from animal tissues while maximally preserving the integrity of bioactive components and structures in the material. Simultaneously, the preparation process effectively incorporates inorganic metal ions, polysaccharides, and drugs to prevent adhesions. The resulting decellularized pericardium possesses both natural rough and smooth surfaces. The smooth surface has a dense fibrous structure, effectively blocking the invasion of adhesion tissues without affecting tendon function. The rough surface allows tissue ingrowth, facilitating rapid vascularization and tendon repair. Furthermore, the decellularized pericardium is loaded with functional components, further promoting tendon healing and preventing adhesions.

The invention provides a characteristic chromatogram construction method and application of a traditional Chinese medicine composition, and the characteristic chromatogram construction method of the traditional Chinese medicine composition comprises the following steps: obtaining a characteristic chromatogram of a test sample by adopting a high performance liquid chromatography; chromatographic conditions of the high performance liquid chromatography are as follows: a chromatographic column is a TC-C18 chromatographic column; the detection wavelength is 190 to 240 nm; acetonitrile is used as a mobile phase A, a phosphoric acid solution is used as a mobile phase B, and a specific gradient elution procedure is adopted for elution; the traditional Chinese medicine composition is a traditional Chinese medicine compound composition comprising semen cuscutae, herba taxilli and radix dipsaci. According to the method disclosed by the invention, effective separation of various chemical components is realized, relatively more chromatographic peak information is obtained, and comprehensive evaluation and comprehensive control of overall quality of internal characteristic components of the traditional Chinese medicine compound composition including semen cuscutae, herba taxilli and radix dipsaci such as the longevity pill are realized.

This invention belongs to the field of valuable metal recovery and water purification technology, and more specifically, relates to an organically covalently cross-linked alginate fiber, its preparation method, and its applications. This invention prepares alginate fibers with good water resistance through organic covalent cross-linking technology, which can be used for the recovery of valuable metals from aqueous solutions, the removal of heavy metals, the softening of drinking water, and the removal of cationic organic pollutants. It can solve the problem of calcium content in existing alginate fibers. 2+ The alginate adsorbent material prepared by ion crosslinking technology suffers from a large number of sacrificed adsorption sites, resulting in low adsorption capacity and limiting its widespread application. The organic covalently crosslinked alginate fiber designed and synthesized in this invention has the characteristics of fast adsorption rate, excellent adsorption performance, and easy solid-liquid separation. Moreover, the organic covalently crosslinked alginate fiber can be regenerated and reused.

This invention discloses a simple method for preparing nano-petal-shaped spherical tin dioxide powder material. (1) Stannous sulfate powder is added to deionized water and mixed to obtain solution A; (2) Sodium carbonate or potassium carbonate is added to deionized water and completely dissolved to form solution B; (3) Solution A obtained in step (1) and solution B obtained in step (2) are thoroughly mixed and stirred continuously; (4) The solution obtained in step (3) is allowed to stand and separate into layers, the supernatant is removed, the concentrated high-concentration suspension is centrifuged and washed and the precipitate is collected, and the precipitate is dried to obtain precursor powder; (5) The precursor powder obtained in step (4) is calcined and heat-treated to completely transform the precursor powder into a stable tin dioxide phase structure, thereby obtaining high-purity and uniform nano-petal-shaped spherical tin dioxide powder. The method of this invention is simple, mild, and easy to realize large-scale industrial production.

The application provides a SiC aerogel material, a preparation method and application thereof. The preparation method comprises the following steps: (1) taking silicon powder as a silicon source and a carbon-containing halide as a carbon source, mixing the silicon powder and the carbon-containing halide according to a proportion to obtain raw material powder, and obtaining mixed powder after pretreatment; (2) placing the obtained mixed powder into a combustion synthesis reaction kettle, then introducing high-purity argon with a certain pressure, igniting the mixed powder to occur combustion synthesis reaction through a tungsten wire coil, and obtaining a carbon-rich SiC aerogel block; and (3) oxidizing and removing carbon from the obtained carbon-rich SiC aerogel block at a certain temperature to obtain a layered nanowire-stacked SiC aerogel. The preparation method has the advantages of simple production process, short cycle, easiness in large-scale production, cheap and easily-obtained raw materials, and the obtained SiC aerogel has the characteristics of low density, high porosity, large specific surface area, good thermal stability and chemical stability, and has a wide application prospect in the fields of heat insulation, energy storage, catalysis, environment, electromagnetic wave absorption and electromagnetic interference shielding.

The application discloses a preparation method of a hierarchical pore double-heterojunction catalyst for enhancing photothermal catalytic carbon dioxide reduction, and the catalyst is obtained by confining a heterojunction precursor solution in polystyrene template channels with a three-dimensional ordered multilayer opal structure, and then through simple calcination treatment, a hierarchical pore S-type heterojunction / Schottky junction photothermal catalytic material with a macropore-mesopore structure is obtained. Compared with other zero-dimensional / two-dimensional photothermal catalytic materials, the heterojunction structure is expanded to a three-dimensional hierarchical porous frame structure, and the obtained photothermal catalytic material has unique advantages of controllable structure and adjustable loading, and provides abundant active reaction site centers for a photothermal catalytic process.