62results about How to "Low preparation equipment requirements" patented technology

The invention discloses a self-decomposition temporary plugging agent for a workover fluid and a using method of the temporary plugging agent. The self-decomposition temporary plugging agent comprises 10-40 parts of particles I with the particle size ranging from 1 mm to 10 mm by mass, 20-60 parts of particles II with the particle size ranging from 20 meshes to 40 meshes by mass, 0.2-1 part of staple fibers with the length ranging from 3 mm to 10 mm by mass and 18-40 parts of superfine powder with the particle size ranging from 100 meshes to 300 meshes by mass; the particles I, the particles II, the staple fibers and the superfine powder are any one of or a mixture of several of polylactic acid, poly lactic-glycolic acid and polycaprolactone in any ratio. The using method of the agent comprises steps as follows: the staple fibers are evenly mixed in the water-based workover fluid, other components of the self-decomposition temporary plugging agent are added, and the mixture is evenly mixed. The self-decomposition temporary plugging agent for the workover fluid can be completely degraded into carbon dioxide and water in an aqueous solution and causes no damage to stratums, and the using method of the agent is suitable for on-site preparation.

The invention discloses a polyvinylidene fluoride anti-pollution membrane and a preparation method thereof, and belongs to the field of environmental functional membrane materials. The preparation method comprises: (1) self-polymerizing dopamine on the surface of polyvinylidene fluoride powder, and adhering the generated poly dopamine functional layer onto the surface of the polyvinylidene fluoride powder; (2) preparing a poly dopamine modified polyvinylidene fluoride membrane by using a phase conversion method; and (3) depositing a nano-TiO2 functional layer on the membrane prepared in the step (2) through a liquid phase deposition method to prepare the polyvinylidene fluoride anti-pollution membrane. According to the present invention, by combining the strong adhesion and the polyfunctional group of poly dopamine, the ultraviolet resistance and stable chemical performance of polyvinylidene fluoride, and the advantages of hydrophilicity, high photocatalytic activity and the like of nano-TiO2, the polyvinylidene fluoride anti-pollution membrane is developed; and the prepared polyvinylidene fluoride anti-pollution membrane has excellent pollution resistance, and can be used in various membrane separation fields.

The invention relates to a levetiracetam slow release medicinal composite and a preparation method thereof. The tablet core of the medicinal composite is mainly composed by 55-65% of levetiracetam in weight percentage and 35-45% of non hydrophilia auxiliary material with the slow release function in weight percentage, the non hydrophilia auxiliary material with the slow release function is mixed by one, two or three of ethyl cellulose, methyl cellulose or behenic acid glyceride, and the slow release medicinal composite does not need a functional controlled release coating to adjust the drug release. The levetiracetam medicinal composite has stable drug release performance, good biocompatibility and dissolution performance; and the preparation technology is simple, is easy to reproduce, and is applicable to industrialization production.

The invention discloses a preparation method of a FeS2 film. The method comprises the following steps: using FTO conductive glass as a base; configuring a seed layer solution; soaking the base into the seed layer solution to coat in a pulling manner at room temperature; forming a layer of even ZnO nanocrystalline seed on the surface of the base; preparing a precursor solution; forming an even and compact ZnO nano rod array film on the surface of the base; covering the surface of the base with a Fe(OH)3 nano rod array by the ZnO nano rod array film at room temperature; carrying out vulcanizing treatment, and converting the Fe(OH)3 nano rod array into an FeS2 nano rod array. The FeS2 film comprises the base made of the FTO conductive glass; the base is covered with the FeS2 nano rod array; each FeS2 nano rod is formed by stacking FeS2 nano particles. The FeS2 film has the advantages that the optical absorption properties and the photoelectric conversion efficiency are improved by increasing the effective optical absorption area of a ferrous disulfide film.

The invention discloses a method for preparing grapheme/cobalt-nickel bimetallic hydroxide. The method comprises the following steps: selecting graphite powder with certain granularity, performing oxidation treatment, filtering and cleaning to obtain graphite powder, then performing microwave expansion on the graphite powder to obtain expanded worm graphite powder, placing the expanded worm graphite powder in an N-methyl pyrrolidone solvent, performing ultrasonic concussion and centrifugal separation, extracting suspension liquid on the upper layer, placing a cobalt salt and a nickel salt with a certain molar ratio therein to obtain a precursor with certain concentration, placing the precursor in a high pressure reactor for heating, filtering, cleaning and drying the product after cooling the same to obtain the grapheme/cobalt-nickel bimetallic hydroxide. The composite material has the advantages of cheap raw materials, low cost, good electrode storage effect and so on, and can be applied to the electrode materials and electrochemical catalysis of supercapacitors.

The invention provides a preparation method of a composite nanostructure double-effect sulfur fixation type lithium-sulfur battery anode material. A nanotube structure is used as a support, nanosheetsare grown in a nanotube via a hydrothermal reaction to form a physical barrier, an organic ligand is added to perform chemical coordination so as to realize a physical-chemical double-effect sulfur fixation structure, and sulfur is injected into the nanotube via carbon disulfide sulfur injection to obtain the lithium-sulfur battery anode material. The composite nanostructure achieves the purposeof high-efficiency sulfur fixation via physical sulfur fixation and chemical sulfur fixation, the preparation method provided by the invention has the advantages of easy acquisition of raw materials,simple process, convenient operation, low cost, environmental friendliness and the like, the requirements for the preparation equipment in the entire reaction process are low, thereby being conduciveto the industrial production, and the prepared material can effectively inhibit the shuttle effect of polysulfide, prolong the cycle life of the lithium-sulfur battery, relieve the volume expansion, and improve the electrochemical performance of the lithium-sulfur battery, so that the prepared material is further applied to the field of new energy resources.

The invention relates to a method for preparing a ferrous disulfide film by chemical bath deposition and vulcanization. The method comprises the following steps: adopting citric acid or malonic acid as a complex agent; obtaining uniform, compact and high-crystallized precursor films on modified general glass in a water bath environment of less than 100 DEG C; vulcanizing; and quickly cooling to obtain the FeS2 film with the purity of not less than 99%. The citric acid or the malonic acid is adopted as the complex agent for complexing metal ions, so that a large amount of ferrous ions and sulfur ions can be inhibited to be not subjected to homogeneous deposition in a solution during early reaction period, thereby enabling heterogeneous deposition to become a main body and being favorable for film formation. Through the adoption of a water bath heating way, a reaction solution is uniformly heated, and the film statically and slowly grows and is uniform and compact. Through the adoption of a quick cooing way, impurity phases are dynamically reduced to improve the purity of the film. The ferrous disulfide film has no selectivity for a substrate, is synthesized in a low-temperature solution, is good in crystallinity, simple in process and low in cost, and is suitable for large-scale production application.

The invention discloses a preparation method of a highly doped nitrogen, phosphorus and carbon nano-sheet for efficient hydrogen production to improve the dosage concentration of heterogeneous atoms such as nitrogen and phosphorus in carbon materials, increase catalytic activity sites in the carbon materials and improve catalytic activity of the carbon materials. An appropriate proportion of nitrogen sources, carbon sources and phosphorus sources are dissolved, stirred, mixed, dried, pyrolyzed and the like to obtain the high-concentration nitrogen and phosphorus doped carbon nano-sheet. The preparation method has the advantages that raw materials are easily obtained, the technology is simple, operation is convenient, the preparation method is low in cost and environmentally friendly and the like. The whole reaction process is low in requirement for preparation equipment, industrial production is facilitated, the prepared materials have nitrogen and phosphorus with high dosage concentration, electro-catalysis hydrogen production performance is effectively improved, and the preparation method has practical industrial significance.

The invention relates to a method for preparing a SiC particle-aluminum alloy composite material cylinder liner, which can meet the requirement of light-weight manufacturing of engines. The method comprises the following steps of: preparing SiC particle-aluminum alloy composite material slurry with volume fraction of between 10 and 20 percent by a stirring casting method; heating to the temperature of between 700 and 750 DEG C for later use; forming the SiC particle-aluminum alloy composite material slurry which is heated to the temperature of between 700 and 750 DEG C and serves as a raw material in a cylindrical mould which is preheated to the temperature of between 350 and 500 DEG C by a centrifugal casting method under the condition that a G parameter is between 50 and 100g; cooling and solidifying to obtain a cylindrical cast, wherein the cast consists of a SiC particle-aluminum alloy composite material annular belt which is distributed close to the external diameter of the cylindrical cast and has an average volume fraction of between 35 and 55 percent and an aluminum alloy annular belt which is distributed close to the internal diameter of the cylindrical cast and does not have any SiC particles; removing the aluminum alloy annular belt part which is distributed close to the internal diameter of the cylindrical cast and does not have the SiC particles by a machining method to obtain a cylindrical member which is made of a high-size SiC particle-aluminum alloy composite material; and mechanically turning and thermally processing the high-size SiC particle-aluminum alloy composite material cylindrical member and chemically corroding the inner wall of the cylinder liner to prepare a cylinder liner part. The SiC particle-aluminum alloy composite material cylinder liner prepared by the method has the characteristics of low linear expansion coefficient, high wear resistance and high thermal performance.

A mixed material of lithium cobalt oxide and three elements and a preparing method thereof are disclosed. Solid-phase mixing and sintering synthesis are adopted to prepare the mixed material from the lithium cobalt oxide having a specific granularity and three elements having a specific granularity according to a proper ratio. The method has low requirements on preparing equipment, but the prepared mixed material has a high compaction density (4.40 g/cm<3> or above), and has better safety performance at 4.5 V or even a higher voltage.

The invention discloses a high-temperature-resistant high-humidity-resistant halogen-free flame-retardant antistatic polypropylene material, and belongs to the technical field of high polymer materials. According to the high-temperature-resistant high-humidity-resistant halogen-free flame-retardant antistatic polypropylene material disclosed by the invention, a halogen-free flame retardant, a coupling agent and expandable graphite with specific contents are added into polypropylene resin, and the expandable graphite is modified by utilizing the coupling agent and then the modified graphite ismatched with other components, so that the original mechanical properties of the polypropylene resin can be effectively retained, the thermal deformation temperature and the flame retardance of the material are remarkably improved, and meanwhile, the material can be prevented from being separated out in a high-temperature and high-humidity environment; the material also meets the GWIT standard ofglowing filaments at 850 DEG C, has excellent antistatic performance, and particularly meets the high use requirements of the glowing filaments in the field of electronic products. The invention further discloses a preparation method of the high-temperature-resistant high-humidity-resistant halogen-free flame-retardant antistatic polypropylene material. The preparation method is simple in operation steps and low in requirements for preparation equipment, and can achieve industrial large-scale production.

The invention discloses a halogen-free flame-retardant low-dielectric-loss glass fiber reinforced polypropylene material, and belongs to the technical field of high polymer materials. The halogen-freeflame-retardant low-dielectric-loss glass fiber reinforced polypropylene material is prepared from the following components in parts by weight: 35 to 80 parts of polypropylene resin, 10 to 40 parts of low-dielectric-loss glass fiber and 1 to 4 parts of halogen-free flame retardant; and the dielectric loss of the low-dielectric-loss glass fiber at the frequency of 4-4.5 GHz is 4*10 <-2>-5*10 <-2>.According to the product, the halogen-free flame retardant with specific content and the glass fiber material with specific dielectric loss coefficient are added into the polypropylene resin, so thatthe original mechanical properties of the polypropylene resin can be effectively retained, the dielectric loss of the material is relatively low, and the thermal deformation temperature and flame retardancy of the material are also improved, and the material meets high use requirements in the field of electronic products. The invention further discloses a preparation method of the product. The preparation method is simple in operation steps and low in requirements for preparation equipment and achieves industrial large-scale production.

The invention discloses a copper foil in-situ growth three-dimensional copper sulfide negative electrode material for a sodium-ion battery, a preparation method and application. A method for preparinga copper-foil-loaded copper sulfide negative electrode material for a sodium-ion battery comprises the following steps of: taking a certain current for constant output, taking a copper foil as an anode, taking a graphite flake as a cathode and taking a solution A as an electrolyte for reaction, repeatedly washing the reacted copper foil with deionized water, drying with nitrogen to obtain a product A, and finally annealing in argon to obtain a product B; and directly tabletting the product B as a negative plate of a button cell. By preparing the in-situ grown negative plate, the use of a binder is abandoned, and an electrode active substance directly grows on a current collector, so that the active substance of the current collector is in full contact. According to the method, the manufacturing cost of the battery is reduced, the battery assembling steps are simplified, the overall energy density and the electron transmission efficiency of the battery are effectively improved, and theelectrochemical performance of the battery is greatly improved.

The invention relates to aqueous cellulose acetate (CA) dispersion and a preparation method thereof, and belongs to a preparation technology of a polymer micro-particle suspension. The preparation method is characterized in that CA is taken as a main raw material; an emulsifier, an organic solvent and water are taken as auxiliary materials; and the aqueous CA dispersion is prepared by utilizing an innovative method, namely an ethanol demulsification-centrifugal dispersion method. The invention aims at providing the brand-new aqueous CA dispersion and the preparation method thereof. The aqueous CA dispersion prepared by the method has the advantages of simplified processing technique, low requirements for preparation equipment, good repeatability and good stability, thus facilitating industrial production; meanwhile the aqueous CA dispersion also has the characteristics of higher solid content, low viscosity, less pollution, short coating time, good film forming property and good sustained and controlled release effect on medicaments; and the aqueous CA dispersion can be utilized as a taste masking material for masking unpleasant odor of the medicaments so as to increase the compliance of a patient.

The invention discloses a method for in-situ preparation of small-size metal oxide on graphene. The method comprises the following step: radiating a graphene-metal ionic reaction liquid by using laserof which the wavelength is 200-600nm (the radiation times are different according to nucleation speeds of different oxides, generally 15 minutes to 2 hours), so as to obtain small-size metal oxides of which the granularity is less than 3nm on graphene through in-situ preparation, wherein the graphene-metal ionic reaction liquid is at least one of a flocculent mixed solution generated after metalions are adsorbed and complexed with graphene, a flocculent mixed solution generated after metal ions are adsorbed and complexed by graphene oxide, and a flocculent mixed solution generated after metal ions are adsorbed and complexed by reduced graphene oxide. The method is not only small in size of metal oxides (the granularity is less than 3nm), uniform in dispersion, free of chemical agents such as reducing agents and stabilizers, free of raw material amount requirement, simple to operate and green and efficient.