1089results about How to "Efficient preparation method" patented technology

A sterile method for preparing stable thrombin component from a single donor's plasma in which the thrombin component and the clotting and adhesive proteins component are harvested simultaneously from the same donor plasma in less than one hour. The combined components provide an improved biological hemostatic agent and tissue sealant by virtue of its freedom from the risk of contaminating viruses or bacteria from allogenic human or bovine blood sources. The thrombin provides polymerization of the clotting and adhesive proteins in less than five seconds, and is sufficiently stable to provide that fast clotting over a six hour period. Further, the clotting times can be predictably lengthened by diluting the thrombin with saline.

A semiconductor device manufacturing method includes, forming isolation region having an aspect ratio of 1 or more in a semiconductor substrate, forming a gate insulating film, forming a silicon gate electrode and a silicon resistive element, forming side wall spacers on the gate electrode, heavily doping a first active region with phosphorus and a second active region and the resistive element with p-type impurities by ion implantation, forming salicide block at 500° C. or lower, depositing a metal layer covering the salicide block, and selectively forming metal silicide layers. The method may further includes, forming a thick and a thin gate insulating films, and performing implantation of ions of a first conductivity type not penetrating the thick gate insulating film and oblique implantation of ions of the opposite conductivity type penetrating also the thick gate insulating film before the formation of side wall spacers.

An RFID tag which is provided with a coil-shaped antenna such that a conductor is placed on the periphery of a magnetic core, the RFID comprising: the magnetic core, an FPC wound on the periphery of the magnetic core, two or more linear conductor patterns formed in parallel with one another on the FPC, an IC that is connected to the linear conductor patterns and disposed on the FPC, a crossover pattern that electrically connects one end and the other end of outermost linear conductor patterns among the linear conductor patterns formed in parallel with one another, where in the two or more linear conductor patterns, adjacent linear conductor patterns in a joint portion in the wound FPC are electrically connected in respective start edges and end edges.

The invention discloses a method for preparing polymer porous nanofiber through mixed phase separation. The diameter of the prepared polymer porous nanofiber is between 300nm and 900nm, and the aperture is 1 to 120nm. The preparation method for the polymer porous nanofiber comprises the following steps of: mixing a polymer, an additive and a solvent according to certain proportion; heating and stirring the mixture until the mixture is completely dissolved and forms transparent solution; performing electrostatic spinning on the solution; depositing primarily generated fibers in ice-water bath or the water bath with the temperature of 0 to 20 DEG C, wherein thermally induced phase separation and nonsolvent induced phase separation are caused; and extracting residual solvent and additive through post treatment to obtain the polymer porous nanofiber. The preparation method is simple and highly effective and is convenient to perform; and polymer porous nanofibers with different diameters and porosities can be prepared by adjusting the conditions of electrostatic spinning. The method has enormous application prospect in aspects, such as high-tech composite materials, water treatment, catalyst carriers, electrode materials and the like.

The invention discloses an anode material for a lithium-ion battery and a preparation method of the anode material. The material is structurally characterized by adopting a core-shell structure and comprises an active and stable core formed by uniformly dispersing submicron-grade multi-scale tungsten carbide particles in an amorphous silicon substrate and a highly-conductive shell coated with a thin-layer graphene sheet formed by stripping. The preparation method is a two-step ball-milling method, during ball milling in the first step, the tungsten carbide particles can fully play a milling assisting role to efficiently refine original coarse silicon; during ball milling in the second step, the graphene sheet formed by stripping ordinary graphite can stabilize the structure and improve the electrical conductivity. Therefore, the prepared anode material for the lithium-ion battery has the advantages of stable structure, good cycle performance, excellent rate performance and the like.

The invention discloses a water phase preparation method of a spherical silver nanoparticle with adjustable size, which comprises the following steps of: 10, preparing a silver seed solution : 101, mixing deionized water with a sodium citrate solution, and obtaining a stabilizer solution after stirring; 102, heating the stabilizer solution to the temperature of water bath, adding an AgNO3 solution, and then adding a NaHB4 solution; and 103, utilizing the deionized water to obtain a constant volume after cooling at room temperature, and obtaining the silver seed solution; 20, preparing the spherical silver nanoparticle: 201, adding deionized water to a flask, then adding sodium citrate solution to obtain a reducer solution, and heating the reducer solution to a boiling state; 202, adding the silver seed solution to the reducer solution, and then adding the AgNO3 solution; and 203, cooling at room temperature to obtain the spherical silver nanoparticle. The preparation method can be used for preparing the spherical silver nanoparticle with favorable monodispersity, and the size of the spherical silver nanoparticle can be adjusted.

The invention discloses a nano silicon/porous carbon composite anode material of lithium ion batteries as well as a preparation method and an application of the composite anode material. The composite anode material is a core-shell structure material consisting of a porous nano silicon particle core and a porous carbon layer shell. The preparation method of the composite anode material comprises the steps as follows: carbonization treatment is performed after an organic polymer layer is coated on the surface of aluminum-silicon alloy powder, aluminum is removed by performing acid etching on a carbonization product, pore forming is performed on a carbon layer, and thus the nano silicon/porous carbon composite anode material is obtained. The preparation method is simple and low in cost, the mass production requirement is met, and the prepared composite anode material can be used for preparing the lithium ion battery and shows high capacity and excellent cycle and rate performance.

The invention provides a completely-methanated catalyst as well as a preparation method and an application thereof. The preparation method comprises the following steps of: respectively mixing precursors of an active component, a first auxiliary agent and a second auxiliary agent and dissolving into water to prepare a solution I; adding a precipitating agent into water to be dissolved to respectively prepare a solution II and a solution II'; adding a precursor of a carrier into the water to be dissolved to prepare a solution III or a solution III'; adding the solution I into the solution II to carry out precipitation to obtain a precipitating system I; adding the solution II' into the solution III to carry out the precipitation to obtain a precipitating system II or adding an acidic solution into the solution III' to peptize to obtain the precipitating system II; and then mixing the precipitating system I with the precipitating system II. According to the completely-methanated catalyst as well as the preparation method and the application thereof, the catalyst is prepared by applying a sub-step reverse precipitating method; and the catalyst has the characteristics of high activity and high safety and is suitable for being applied to a high-temperature or low-temperature completely-methanated reaction process for synthesizing natural gas by coal gasification through methanation.

The invention discloses a preparation method of nemadectin. According to the invention, a fermentation broth used for producing nemadectin is directly dried by spraying, such that solid powder is obtained; the solid powder is extracted by using an organic solvent, the extract is filtered, and nemadectin in the extract is absorbed by using macroporous resin; nemadectin absorbed by macroporous resin is then eluted; and the eluent is extracted, concentrated, and dried, such that a nemadectin pure product is obtained. According to the invention, a direct spray-drying method is adopted upon the fermentation broth, and the obtained dried solid fermentation bacterium powder is transportation-tolerant, and is easy to store. With the method provided by the invention, the producing of nemadectin degradation product is reduced, the bacterium powder is easy to extract, and the consumption of the extraction solvent is low. The technology is simple, the cost is low, and the method is easy to operate. With the method, the prepared nemadectin has a high HPLC purity of above 90%.

The invention discloses carbon nano tube reinforced polyaniline nano-fiber and a preparing method thereof. The preparing method includes steps of: adding aniline monomers and carbon nano tubes into dilute acid for ultrasound treatment to obtain carbon nano tube and aniline monomer blend solution; dissolving initiators into ethanol to form initiator solution and dissolving oxidants in dilute acid to form oxidant solution; and adding the initiator solution into the carbon nano tube and aniline monomer blend solution, then adding the oxidant solution, severely swinging for a moment, performing centrifugation, washing, redispersion and the like after standing reaction is complete so as to finally obtain the carbon nano tube reinforced polyaniline nano-fiber. The preparing method is simple, efficient and high in controllability. The carbon nano tubes can be uniformly dispersed on a polyaniline matrix. The mean diameter of the obtained carbon nano tube reinforced polyaniline nano-fiber is 30-60 nm, the length is 1-2 mu m, and electric conductivity is 10(-8)-10(2) S/cm, and the carbon nano tube reinforced polyaniline nano-fiber can be used in the application fields such as sensors, actuating devices, ultra-capacitors, electrochromatic windows, functional coatings and ultrafiltration membranes.

The invention discloses a bioactive bacterial cellulose-zein composite film and a preparation method thereof. The method comprises the following steps: preparing and purifying a bacterial cellulose film; uniformly stirring the purified bacterial cellulose in distilled water, shearing by using a high-speed shearing machine, and homogenizing by high pressure microfluidization to obtain a nano-fiber dispersion liquid; dissolving zein and water-insoluble bioactive substances in an ethanol-water solution to obtain an alcoholic solution; dissolving sodium caseinate in water, stirring and adding the solution into the alcoholic solution to obtain a mixed solution; removing the ethanol, and centrifuging to obtain bioactive molecule enriched zein nanoparticles; mixing the nano-fiber dispersion liquid and the bioactive molecule enriched zein nanopartiles, uniformly stirring, and carrying out ultrasonic treatment; and sucking and filtering in vacuum, and quickly forming a film; and drying. The composite film material has the advantages of excellent mechanical performance, biocompatibility and biodegradability, and has managed bioactivities of bacteria resistance, oxidation resistance and the like.

The invention relates to a two-dimensional perovskite single-crystal and a preparation method thereof. The chemical composition of the two-dimensional perovskite single-crystal material is A2PbBr4, wherein A is C4H9NH3+ or C3H7NH3+. Lead bromide and ammonium bromide with the ratio being 1:2 are adopted as raw materials, dimethylformamide is adopted as a solvent, chlorobenzene or a mixture of chlorobenzene and acetonitrile are adopted as an anti-solvent, and due to the anti-solvent mixing evaporation method, the large-size two-dimensional perovskite single-crystal is prepared under the room temperature atmosphere environment. The method is low in environment condition requirement, simple in process, applicable to preparing large-size crystal. The two-dimensional perovskite single-crystal has the good application prospect in the photoelectric field, and the efficient and simple preparation method has the great potential for single-crystal commercialization application.

The invention relates to a method for preparing biodegradable polyester. Firstly, melt polycondensation is conducted through diol and dicarboxylic acid and a low molecular weight polyester prepolymer with number average molecular weight between 2, 000 and 20, 000 or intrinsic viscosity below 0.64dL/g is prepared; binary oxadiazoline and diacyl bis-caprolactamate are combined to extend chain, and chain extension is carried out at a certain temperature; and the biodegradable polyester is obtained. The number average molecular weight of polybutylene adipate (PBA) can reach up to 39, 000 and the intrinsic viscosity to 1.13dL/g. For poly (butylene succinate) (PBS) with relatively high melting point, the intrinsic viscosity after chain extension is up to 0.99dL/g.

The invention discloses a Cu2O-TiO2/reduced graphene oxide (RGO) ternary complex, and a preparation method and applications thereof. The preparation method of the ternary complex comprises the following steps: preparing graphene oxide (GO) through a Hummers method, preparing a TiO2/RGO binary complex through a hydrothermal method, and preparing the Cu2O-TiO2/RGO ternary complex through precipitating and reducing processes. The preparation method has the advantages of simplicity, low cost and benefiting for the industrialized production; and the prepared ternary complex has a high catalysis activity in a visible region as a visible-light-induced photocatalyst, has a high catalysis efficiency, is especially suitable for degrading organic pollutants in a solution, and can be used for photo-decomposing water to produce hydrogen and degrading volatile organic pollutants in air as the visible-light-induced photocatalyst.

The present invention relates to silicone compositions which comprise at least one ketoximosilane-terminated polydiorganosiloxane and also at least one alkoxysilane. These compositions are neutrally crosslinking and combine a low odour with high adhesion and good storage stability.

The invention discloses an aluminum alloy 7085 microalloyed with strontium, which is formed by microalloying aluminum alloy 7085 with a small amount of strontium. The alloy mainly comprises Al, Zn, Mg, Cu, Zr and Sr, wherein the mass percent of Zn is 7.0-7.95%, the mass percent of Mg is 1.41-1.80%, the mass percent of Cu is 1.50-1.59%, the mass percent of Zr is 0.138-0.148%, the mass percent of Sr is 0.0228-0.0237%, and the balance is Al and a small amount of impurity elements. The preparation process flow of the alloy is as follows: melting pure Al, sequentially adding Al-Cu intermediate alloy, Al-Sr intermediate alloy, Al-Zr intermediate alloy, pure Zn and pure Mg, melting, adding hexachloroethane for refining, standing and maintaining the temperature for 5-10 minutes, and then casting into ingots; and carrying out post treatments of annealing, stamping and soilid solution ageing on the alloy ingots formed by casting. The invention has the advantages of high rigidity, good exfoliation corrosion resistance and wide application range.

The invention discloses a completely biodegradable material filling master batch and a preparation method thereof. The completely biodegradable material filling master batch is characterized by comprising the following components in percentage by weight: 5-35 percent of completely biodegradable material based carrier, 60-90 percent of filler and 1-10 percent of auxiliary agent. The excellent completely biodegradable material filling master batch has great filling amount in a completely biodegradable material, remarkable cost advantage and good mechanical performance, has good dispersibility after adding, improves the heat resistance and stability of a biodegradable material and effectively improves the processing environment, and is a good completely biodegradable material filling master batch.