166results about How to "The preparation process is stable and reliable" patented technology

The invention provides a polyaniline-manganese dioxide-titanium nitride nanowire array composite material which comprises a carbon substrate (1), a titanium nitride nanowire array (2), a villiform manganese dioxide nano-film (3) and a coralliform polyaniline nanofiber (4). The titanium nitride nanowire array (2) is perpendicularly arranged on the surface of the carbon substrate (1) and connected with the carbon substrate (1) to form an integral structure, the manganese dioxide nano-film (3) coats the surface of the titanium nitride nanowire array (2), and the coralliform polyaniline nanofiber (4) is adhered on the surface of the manganese dioxide nano-film (3). The invention further provides a preparation method of the composite material and application of the composite material in a supercapacitor. The polyaniline-manganese dioxide-titanium nitride nanowire array composite material has features of an orderly-arranged porous structure, is regular and controllable in shape and appearance, can be directly applied to an electrode material of the supercapacitor and has wide actual application value and industrial production prospect.

The invention discloses a carbon nanotube filling composite membrane with alcohol penetration priority in the field of penetration vaporization membrane separation technology and preparation method thereof. The preparation method of the composite membrane comprises the following steps: casting polyvinylidene fluoride on a polyester non-woven fabric, scraping membrane by an immersion phase inversion method for obtaining a supporting layer; And then stirring the carbon nanotube and the polydimethylsiloxane by ultrasound for uniform dispersion, adding cross-linking agent and catalyst for reacting and forming a membrane casting solution, casting onto the bottom membrane and obtaining a separating layer. The membrane obtained by the method has the advantages of improved mechanical strength, penetration throughtput and selectivity, especially substantially increased hydroxylate multi-wall carbon nanotube hydrophobicity after trichlorosilane modification, improved polydimethylsiloxane compatibility and separating factor. The invention has the advantages of reliable and stable method, simple preparation technology, enhanced mechanical performance of pure polydimethylsiloxane membrane, improved penetration throughput and separating factor, and good industrial application prospect.

The invention discloses phosphorylcholine structure-modified graphene oxide and a preparation method thereof. The phosphorylcholine structure-modified graphene oxide is formed by connecting at least one oligomer containing a phosphorylcholine structure to a graphene oxide slice by a chemical grafting mode. The phosphorylcholine structure-modified graphene oxide is chemically grafted with the hydrophilic phosphorylcholine structure, so that the phosphorylcholine structure-modified graphene oxide is high in dispersibility and stable in water, saline and cell culture fluid, and can be placed at room temperature for a long term and does not have precipitate. The phosphorylcholine structure is an inherent compound such as a part of phospholipid in an organism, so that the phosphorylcholine structure-modified graphene oxide possibly has biocompatibility and is possibly applied to the biomedical field. The preparation method for the phosphorylcholine structure modified graphene oxide is simple, convenient and reliable and is easy to implement.

A rare earth doped nanometer composite ceramic coating comprises a spray coating, the spray material of the spray coating is rare earth oxide component doped nanometer tungsten carbide powder, the nanometer tungsten carbide powder is nanometer WC-10Co4Cr powder, and the particle size of the particle size of the powder is 15-53[mu]m; and the doped rare earth oxide is Sc2O3, La2O3 or Ce2O3, and the content of the doped rare earth oxide is 0.5-3wt%. The microscopic hardness of the above wear resistant coating is 1350-1450HV0.2, the surface wear resistance of the coating is above 140 times that of ZG06Cr13Ni4Mo, the self corrosion potential and the self corrosion current density of the coating are smaller than those of a common tungsten carbide coating, and the coating provided by the invention has large microscopic hardness, bonding strength and small amount of porosity. A water turbine with the surface sprayed with the coating provided by the invention has greatly improved erosion and corrosion resistance, and the coating prolongs the service life of the surface material of the water turbine 12.5-25 times.

The invention discloses a bottled grease micro emulsion freeze-dried preparation with 13 composite vitamins. The preparation is prepared by wrapping lipid-soluble vitamins A, D, E and K in grease micro emulsion of which the particle size is smaller than 120nm, mixing with water-soluble vitamins B and C, folic acid, nicotinamide and the like, adding a freeze-drying forming agent and a redissolution additive, and freeze-drying. The novel freeze-dried preparation, which contains 13 vitamins and is developed according to the above formula and the preparation method, is simple in process, the stability of the vitamins can be improved, and the side effect caused by medicine decomposition and decomposition products is alleviated; the problem of codissolution of lipid-soluble vitamins and water-soluble vitamins is effectively solved, sufficient dissolution of medicine compounds is ensured, and the side effect of undissolved substances on human bodies is avoided.

The invention relates to a magnesium-strontium-rare earth interalloy and a preparation method thereof, belonging to the fields of metal materials and metallurgy. The interalloy provided by the invention is prepared from the following components in percentage by weight: 60.0-90.0% of magnesium, 5.0-20.0% of strontium and 5.0-20.0% of rare earth, wherein the rare earth is one or more of cerium-richmixed rare earth, lanthanum-rich mixed rare earth, cerium, yttrium, lanthanum, praseodymium, samarium, europium, terbium, holmium, erbium, thulium, dysprosium and gadolinium. The preparation technique provided by the invention comprises the following steps: under the gas protection, melting a pure magnesium ingot, proportionally adding strontium (or magnesium-strontium interalloy) and rare earth (or magnesium-rare earth interalloy) into the melt, stirring while keeping the temperature until the melt composition becomes uniform, and casting into an alloy ingot or extruding into a wire or rod. The interalloy has the advantages of excellent refinement and modification effects, long effective period, simple preparation technique, high reliability, low cost and the like.

The invention discloses a method for preparing high-purity perfluoroisobutyronitrile. The method comprises the steps that the raw material perfluoroisobutyronitrile passes through a single-stage adsorption tower at a certain flow rate under a certain temperature and pressure by using a mass flowmeter; and after most water and a small amount of acidic matter are adsorbed and removed, the raw material perfluoroisobutyronitrile enters a rectifying tower, then batch rectification is carried out at a low temperature, and impurities such as nitrogen, oxygen, carbon dioxide, carbon monoxide, halogenated alkane, halogenated olefin and fluorocarbon are removed by emptying the tower top, so that the high-purity perfluoroisobutyronitrile with the purity of more than 99.99% is obtained. The method isreasonable in process and simple to operate, and is an ideal technology for preparing the high-purity perfluoroisobutyronitrile.

The invention provides bismuth titanate based piezoelectric ceramic with high curie temperature and a preparation method thereof. (1-x)(0.6Bi4Ti3O12-0.4BaTiO3)-xPbTiO3 ceramic is prepared by the traditional solid-phase sintering method, wherein x=0.02-0.10. The piezoelectric ceramic with the high curie temperature is prepared from Bi4Ti3O12 prepared by a molten salt method and analytical pure BaTiO3, Pb3O4 and TiO2 serving as raw materials by the steps that powder is mixed, ball-milled, dried, presintered, secondarily ball-milled, pelleted, molded and batched sequentially and is finally sintered for 2-4 hours at the temperature of 1,050 to 1,100 DEG C. The piezoelectric ceramic is prepared by the traditional piezoelectric ceramic preparation method. The prepared BaBi4Ti4O15 based piezoelectric ceramic has the curie temperature of over 450 DEG C, a stable and reliable preparation process, an electrical property which meets the requirement on the practicability of the piezoelectric ceramic and application to special high-temperature environments such as aerospace, petrochemical industry and the like.

The invention relates to a high-purity ginkgolide and its composition. It is a white powder with slightly bitter taste. The content of ginkgolide A is 10-20%, the content of ginkgolide B is 10-20%, and the content of ginkgolide C is 10-20%. 5-15%, the bilobalide content is 30-50%, and the total lactone content is 80-95%. Ginkgo biloba is used as raw material, heated and refluxed with ethanol solution with a mass fraction of 20-80% to extract, the extract is concentrated to recover ethanol, separated by a macroporous resin column, desorbed by ethanol, diluted with water, and then passed through a gel-type hydrogen bond Adsorption and desorption of the adsorption resin, collection of effluent and desorption liquid, concentration, drying, ethanol dissolution, activated carbon decolorization, concentration and drying. The preparation process is simple, reliable, low in cost and high in yield, and no toxic organic solvent is used in the process, which is an environment-friendly process. The high-purity ginkgolide is used as an active ingredient to prepare a composition that can be used as various preparations (capsules, tablets, oral liquids, granules, powders, injections, etc.) of ginkgolide medicines or health care products.

The invention discloses a form preparing method for assembling nanometer-micrometre array material, which is characterized by the following: pre-processing 70%(100)high-purity aluminium foil; putting high-purity aluminium foil into acid solution with chloride ion to etch (aluminum foil for anode, ampere density applied by aluminum foil: 0. 1í‡104-7. 0í‡107A/m2, chloride ion solution strength of etching liquor: 0. 5molíñL-1-6. 0molíñL-1, acid concentration: 0. 1molíñL-1-5. 0molíñL-1, etching temperature: 60-02 deg. c, etching time: 2-200s); washing aluminum foil with plenty of clear water; scouring off etching liquor on the surface; drying the aluminum foil after washing; getting aluminium tunnel pore mold with bore diameter of 100nm-2000nm.

The invention discloses a magnetic phase change alloy. The magnetic phase change alloy has a formula of (Mn1-alpha M alpha)xNiy(Ge1-beta Si beta)z; M=Fe or Co; x is not more than 36 and not less than 30; y is not more than 36 and not less than 30; z is not more than 36 and not less than 30; x+y+z=100; alpha is more than 0 and less than 0.8; and beta is not more than 1 and not less than 0. The magnetic phase change alloy has high-temperature huge magnetic heat effect, and widens the temperature range of a magnetic heating material; needed raw materials are rich in storage, easy to store and low in cost; and a preparation process is simple and reliable, is excellent in stability, and is easy to industrial produce. The magnetic phase change alloy is excellent in comprehensive performance, and is an ideal Mn base non-rare earth magnetic heat pump and thermomagnetic power generation candidate material.

The invention discloses a method for preparing high-purity trifluoroiodomethane. The method comprises the steps that: raw material trifluoroiodomethane passes through a two-stage adsorption column ata certain temperature and pressure and at a certain flow rate to remove most of the water and some organic impurities, then trifluoroiodomethane enters a rectification tower, batch rectification is conducted at low temperature, and tower top is emptied to remove impurities of halogenated alkanes, halogenated olefins, halogenated alkynes, nitrogen, oxygen, carbon dioxide, carbon monoxide and the like of C1 to C5, thereby obtaining the high-purity trifluoroiodomethane with a purity greater than 99.99%, wherein the H2O content is less than 30 ppmv, HF content is less than 1ppmw, and requirementsof the semiconductor etching and electrical insulation industries are met. The method is reasonable in process and simple in operation, and is an ideal technique for preparing the high-purity trifluoroiodomethane.

A lipid emulsion of astragaloside A is proportional prepared from astragaloside A, oil, surfactant, isotonic regulator, cosolvent and water for injection. Its preparing process is also disclosed.

The invention discloses a mesoporous photo-thermal catalyst for medium-high temperature methane dry reforming as well as a preparation method and application thereof. The preparation method belongs tothe field of solar photo-thermal conversion and photo-thermal catalyst preparation methods, and adopts an impregnation method to load a thermal catalyst Ni to the surface of a mesoporous TiO2 photocatalyst, so as to form the Ni-mesoporous TiO2 photo-thermal catalyst with nano Ni particles loaded on the surface of mesoporous TiO2. The medium-high temperature methane dry reforming photo-thermal synergistic catalyst provided by the invention is simple to prepare and easy to operate, has good photo-thermal synergistic catalytic activity at 400-600 DEG C, and has obviously improved activity compared with the traditional Ni-based thermal catalyst, so that the catalyst has higher industrial application level and prospect.

The invention discloses a non-asbestos composite fiber and a preparation method of the on-asbestos composite fiber, and belongs to the technical field of chemical material manufacturing. The non-asbestos composite fiber has the main technical characteristics that: the fiber is composed of the following raw material compositions in percentage by weight: 62-80% of a fiber material, 17-34% of a powder material, and 3-6% of a modifier, wherein the fiber material is a non-natural fiber material subjected to high-temperature treatment, the powder material is selected from talcum powder, bentonite, vermiculite and mica powder and the like in silicate materials, the particle size of the powder material enables the powder material to achieve 100% of passing rate at 100 meshes, and the modifier is a polymer resin or a combination thereof. The composite fiber disclosed by the invention is simple in material production process and low in cost, and has good comprehensive performances such as low shot content, small fiber diameter and high fiber strength and the like; and the used fiber does not contain asbestos and asbestos fiber, therefore, the non-asbestos composite fiber is nonpoisonous, and has no harm to the human body and environment. Therefore, both in production and use, the safety and reliability can be ensured, so the non-asbestos composite fiber is an environmental-friendly novel composite fiber material.

The invention discloses a process for preparing hirudin peptide for reducing harmful bleeding reaction of hirudo. The process comprises the following steps: grinding and homogenating dried hirudo, adding 10000NFU/g of pepsin at 36-38 DEG C and pH of 2.0, and performing enzymolysis for 8 hours and above; performing alcohol precipitation on enzymatic hydrolysate, and concentrating and lyophilizing the filtrate to obtain hirudo extract. The hirudo extract PHL prepared by using the method can be used for inhibiting the process of atherosclerosis on the premise of not influencing the blood coagulation factor of endothelial cells. A reliable preparation process is provided to a safe and reliable novel oral preparation which can be clinically used for preventing atherosclerosis for a long time and has weak harmful bleeding reaction.

The invention relates to a fly ash and soil composite material used in highway roadbed and is characterized in that the material consists of fly ash, soil and polypropylene fiber; the technique is simple and reliable to ensure that the fly ash and soil composite material has good frost resistance property; the unconfined compressive strength of the fly ash and soil which is doped with the polypropylene fiber is 1.26 to 1.74 times higher than the unconfined compressive strength of pure fly ash and soil. According to the characteristics of roadbed freezing injury mechanism and structural style in seasonal frozen areas, the fly ash and soil composite material of the invention adopts novel materials which have the advantages of good resistance to freezing and thawing, high strength, low cost and environmental protection as the roadbed filler, which not only has theoretical guidance meaning, but also has direct practical meaning for solving engineering problems.