832 results about "Preparation procedures" patented technology

The present invention provides a method for preparing dental restorations, the method comprising the steps of (a) compiling a database of materials for use in preparing a dental restoration; (b) compiling a database of procedures for preparing the dental restoration; (c) determining the geometrical constraints of the dental restoration; (d) determining the aesthetic constraints of the dental restoration; and (e) inputting the geometrical constraints and the aesthetic constraints to a computer to mathematically select from the material database and the procedure database a recipe for producing the dental restoration.

The invention relates to a preparation method for aromatic series polybenzimidazole resin film, comprising: (1) under function of polyphosphoric acid/phosphorus pentoxide system, condensation polymerization reaction is carried out to aromatic series amine and aromatic series dicarboxylic acids mixed according to mol ratio of 1:1 in nitrogen atmosphere; (2) after cooling, polymer is poured into water and broken down into powder in a resin pulper and washed over and over again by distilled water and soaked for 48 hours in NaHCO3 solution and washed till pH value shows neutral and drawn and filtered for drying in vacuum; (3) the polymer dried is dissolved in even solution prepared by organic solvent with mass percent of 5 percent, and then is dried at temperature of 130 DEG C for 12 hours, and is soaked in hot water for boiling and striping, and is dried in vacuum at temperature of 100 DEG C for 5 hours and then is obtained. The polybenzimidazole prepared by the invention has the advantages of big molecule weight, stable thermal stability, fine solubility and film forming performance, etc. The preparation has simple technology, low cost, convenient operation and can be finished in common equipments through preparation procedure.

This invention relates to a silica dioxide aerogel and the preparation method thereof. Said silica dioxide aerogel is surface activity adjustable and nanometer porous. The preparation procedures comprise: use polysiloxane, water, solvent and catalyst as raw material to make wet gel by sol-gel processing, wherein the volume ration of polysiloxane, water, solvent and catalyst is 1:3-15:0.5-1.0:0.02-0.1; conduct surface conditioning of the wet gel, wherein the volume ratio of the coating material and the conditioning solvent is 1:5-15; take out the wet gel to conduct normal pressure drying and sectional thermal treatment, with the temperature range between 100 and 600Deg C. This invention can transform the original hydrophobic state of the aerogel particle to hydrophilic state according to the practical need, suitable for different application requirement. It also has benefits of low cost and simple process, which makes it much qualified for industrial production.

The present invention relates to a security control method and device for emergency calls in a mobile communication system, and the security control method in a mobile communication system supporting emergency calls according to an embodiment of the present invention comprises: a step in which a terminal transmits a message containing terminal security capabilities to a source network during handover in an emergency call; a step in which a mobility manager of the source network transmits, to a mobility manager of a target network, the message containing terminal security capabilities; a step in which the mobility manager of the target network transmits, to a base station of the target network, a hand-over request message containing the terminal security capabilities; and a step in which, after the hand-over preparation procedure has been completed, a base station of the source network transmits, to the terminal, a hand-over command message containing the terminal security capabilities.

The invention discloses a method for preparing 1, 2-propylene glycol reaction hydrogenated by glycerol, which adopts CuO-SiO2 as catalyst, one or two of carbinol and water as reaction solvent. The glycerol is hydrogenated to prepare 1, 2-propylene glycol under the operation condition of reaction temperature of 140-200 DEG C and reaction pressure of 4.0-10.0 Mpa. The inventive catalyst adopts normal preparation procedure and the catalyst composition is simple and doesn't contain chromium metal. The alcohol-water mixed solvent system realizes high conversion rate of the reaction.

The invention provides a catalyst preparation method. The procedure is that:1} a solution containing soluble compounds with loaded components is prepared; 2} the solution produced in procedure 1 is sprayed on a rolling carrier or a carrier preloading one or a plurality of components and the carrier is heated in the process of spraying; 3) the product produced in procedure 2 is dried or roasted; 4) the procedures 2 and 3 are repeated. The active components of the catalyst prepared in the method of the invention contain group eight elements. When the catalyst preparation method of the invention is applied in the hydrocarbon preparation procedure from mixed gas of carbon monoxide and hydrogen, the active components of the catalyst prepared contain group eight elements. The invention provides a better shell catalyst preparation technique, which solve the problem of internal diffusion in certain chemical conversion procedures. The catalyst can be applied in hydrocarbon preparation reaction of gas mixture of carbon monoxide and hydrogen.

The invention discloses a metal/graphene composite material and a preparation method thereof. The metal/graphene composite material comprises metal particles and graphene; the metal particles are uniformly clad with the graphene; the mass ratio of the metal to the graphene is 1:(0.005-0.1); and the graphene is reduced graphene oxide which has an atom-laminated structure and is obtained through in-situ reduction of graphene oxide on the surfaces of the metal particles. Compared with a traditional preparation method, the preparation method disclosed by the invention has the advantages that the processes of metal melting, activating and the like are not performed, so that the preparation procedure of the composite material is greatly simplified; energy waste and environment pollution are avoided; and the metal/graphene composite material which is higher in dispersity and better in property is obtained.

The invention discloses a waterborne plastic-absorbing glue and a preparing method thereof. The waterborne plastic-absorbing glue is prepared from, by weight, 40-60 parts of aromatic aqueous polyurethane dispersion, 40-60 parts of ethylene-vinyl acetate emulsion, 0-10 parts of tackifying resin, 0.05-0.5 part of antifoaming agent, 0.1-1 part of wetting agent, and 0.1-1 part of thickening agent. The plastic-absorbing glue has excellent heat-resistant performance, pickup rate, bordure performance, low-temperature viscosity stability, and low activation temperature. The preparing method comprises the steps of adding aqueous polyurethane dispersion and ethylene-vinyl acetate emulsion into a high-speed dispersing kettle, then adding the tackifying resin, wetting agent, and antifoaming agent in sequence under a stirring condition, and finally adding the thickening agent to adjust the mixture into suitable viscosity to obtain the waterborne vacuum plastic-absorbing glue. According to the waterborne plastic-absorbing glue and the preparing method thereof, it is not necessary to adjust the pH of the ethylene-vinyl acetate emulsion in advance, and thus preparation procedures of traditional plastic-absorbing glue are simplified, and deslagging risks in the preparing process are lowered.

The invention discloses a method for preparing a metal silver nanostructure in water solution, which includes the steps: determining types and proportions of initial reactants according to requirements of different morphologies and evenly mixing the initial reactants to obtain precursor water solution; growing silver nanostructures in the precursor water solution at the constant temperature of 50-105 DEG C; and centrifugally separating and washing reaction solution to obtain silver nanostructures of different morphologies. Inert gas for protection is omitted, reaction temperature is low, the preparation process is simple, the cost is low, and the method overcomes the shortcomings of complicated preparation procedures, low yield, high cost and the like of a traditional polyhydroxy reduction method, a traditional illumination method and a traditional oxidation reduction method, and has important significance for industrial mass production and practical application of the silver nanostructures of different morphologies.

This invention discloses a preparation of tervalence double specificity antibody and its service application. The antibody includes person IgG1 heavy chain first constant region CH1, k chain constant region CL structure field, heavy chain heavy chain variable region VH and light chain variable region VL antibody A, and single chain variable region scFv of antibody B. VH is connected to N terminal of CH1, scFv connected to C terminal of CH1, VL connected to N terminal of CL, scFv to C terminal of CL. The preparation procedures include building of express carrier, express and detect of double specificity antibody, purification of double specificity antibody, combination analysis of double specificity antibody etc. there are little side effect, good guidance quality etc. advantages of the tervalence double specificity antibody of this invention, it can be used to prepare curing medicine of cancer.

The invention discloses a new preparation method for silicon dioxide gas gel with high intensity and low density, belonging to inorganic porous material technical field. The concrete preparation procedures comprise: hydrolyzing orthosilicate methyl ester or orthosilicate methyl ester for two to six hours under the pH value between one point five and four point five at the temperature between fifty to eighty DEG C, adding ammonia in drops, then injecting into a mold to form a wet gel monomer in the air, putting the wet gel obtained to a pressure tank, aging for three to ten days in the aging liquid with a certain ratio at the temperature between eighty DEG C to one hundred and fifty DEG C, then obtaining the silicon dioxide gas gel setting material with high intensity and low density through drying. The new preparation method for silicon dioxide gas gel with high intensity and low density has the advantages of having easy operation and simple technology, increasing the intensity of traditional silicon dioxide gas gel material, simultaneously ensuring low density, and promoting the application of silicon dioxide gas gel in setting and insulation product field.

The invention discloses a preparation method of a supporting type film bulk acoustic wave resonator. The method comprises the following steps: growing a metal insertion layer on a (111) surface Si substrate, and continuing to grow a single crystal AIN film on the (111) surface Si substrate through a metal-organic chemical vapor deposition method, and finally depositing a metal electrode and a supporting layer on the single crystal AIN film. By means of film transfer, peeling, top electrode etching and other processes, a sandwich piezoelectric stacking structure of the film bulk acoustic wave resonator is formed at last. According to the preparation method disclosed by the invention, by importing the metal insertion layer, the mismatch phenomenon between the AlN epitaxial and the growth substrate is reduced, and the yield and the figure of merit of the device are improved on one hand; and on the other hand, a top electrode pattern can be directly etched after the film transfer and peeling procedures, so that the preparation procedures are simplified.

The invention discloses a nanometer material with controllable particle sizes and silicon dioxide hollow spheres and a method for preparing nanometer material. TEOS (tetraethyl orthosilicate) is used as an organic silicon source, CTAB (cetyl trimethyl ammonium bromide) is used as a structure directing agent, water, ethyl alcohol and cyclohexane are used as solvents, and PVP (polyvinyl pyrrolidone) is used as a stabilizer. The method includes carrying out heat reaction by the aid of the solvents to form precursors of the SiO2 hollow spheres; calcining the precursors and removing organic matters so as to obtain the SiO2 hollow spheres. The nanometer material and the method have the advantages that the silicon dioxide hollow spheres prepared by the aid of the method are excellent in dispersibility and have the adjustable particle sizes (of 220-430 nm), large pore diameters (of 10-12 nm) and uniform shell thicknesses, and cavities are large and can be used for storing large quantities of guest molecules; the nanometer material is high in chemical stability and packaging capacity and can be widely applied to the fields of enzymatic catalysis, substance adsorptive separation and the like; the method includes simple synthesis processes, is clean and is free of pollution and low in cost, and preparation procedures are good in repeatability.

The invention discloses a copper-bearing bimetallic nanometer material with a dentritic structure and a method for manufacturing the copper-bearing bimetallic nanometer material. The method includes manufacturing procedures of adding surfactants and mixed solution containing copper and another metal precursor into water solution; adding moderate reducing agents into the water solution to reduce the water solution. The copper-bearing bimetallic nanometer material and the method have the advantages that the dentritic nanometer structure is single in morphology and uniform in size, and components of the copper-bearing bimetallic nanometer material are controllable; raw materials required in the method are cheap and are easily available, the preparation procedures are simple and convenient, elapsed reaction time is short, and safe operation can be implemented; the dentritic nanometer structure can have important application in the catalysis and electrochemistry fields.

The invention discloses a method for preparing graphene aerogel and application thereof, and relates to the technical field of graphene materials. The method includes steps of uniformly mixing graphene oxide dispersion liquid and amine curing agents with one another to obtain graphene oxide mixed liquid; hermetically heating the obtained graphene oxide mixed liquid to obtain the graphene aerogel. The amine curing agents are one type of or a plurality of types of diaminodiphenyl-methane, diamino diphenyl sulfone, diethylenetriamine, triethylenetetramine, diethylaminopropylamine and m-phenylenediamine. The graphene aerogel prepared by the aid of the method can be applied to epoxy resin, so that graphene aerogel/epoxy resin composite materials with high conductivity and excellent mechanical properties can be obtained. The method and the application have the advantages that the graphene aerogel prepared by the aid of the method is internally of a uniform macroporous structure and is high in porosity; the amine curing agents are adopted in preparation procedures, accordingly, the epoxy resin interface bonding can be improved, and the conductivity and the mechanical properties of the epoxy resin can be enhanced.

The invention relates to a high-temperature oil-soluble temporary blocking agent. The high-temperature oil-soluble temporary blocking agent is characterized by comprising the following components in percent by weight: 10-40% of asphalt, 20-50% of C9 petroleum resin, 15-50% of coumarone resin, 5-15% of a surfactant, 2-15% of a polymer fiber and 1-10% of a softening-point additive. The preparation procedures of the high-temperature oil-soluble temporary blocking agent are as follows: firstly, adding the asphalt into a reactor, heating to melt the asphalt, adding the C9 petroleum resin and the coumarone resin into the reactor, stirring continuously until the substances in the reactor are fully melted, continuously adding the surfactant, the polymer fiber and the softening-point additive into the reactor, stirring for 30 minutes to mix uniformly, stopping heating a mixture, cooling, then collecting particles, washing, and screening to obtain the high-temperature oil-soluble temporary blocking agent with different particle sizes. The high-temperature oil-soluble temporary blocking agent provided by the invention overcomes the defect that the traditional oil-soluble temporary blocking agent can not resist high temperature. The high-temperature oil-soluble temporary blocking agent has good oil solubility, acid and salt resistance and high-temperature degradation resistance. The added softening-point additive is capable of regulating the range of the softening point, and thus an oil layer can be protected.

The invention discloses graphene conductive ink, which is composed of the following components in mass part: 20-50 parts of adhesive resin, 40-100 parts of alcohol solvent, 10-80 parts of graphene, 1-3 parts of dispersing agent, 1-3 parts of defoaming agent, and 1-3 parts of stabilizing agent, wherein the adhesive resin is one or two types from acrylic resin and polyurethane resin; the alcohol solvent is one or multiple types from ethyl alcohol, glycerin and isopropyl alcohol; the graphene is one or multiple types from single-layer graphene, double-layer graphene and three-layer graphene. The graphene conductive ink is simple in preparation procedure and low in cost; the graphene is selected as an electric conducting medium, so that the electric conducting performance is excellent, the stability is high and the mechanical property is good; the graphene conductive ink has excellent abrasive resistance and scratching resistance.

A preparation method of a high-capacity monocrystalline type ternary cathode material comprises steps as follows: S1, a nickel cobalt manganese hydroxide precursor of a core-shell structure is prepared with a coprecipitation method, a loose and porous core is prepared by intermittently introducing a certain quantity of bicarbonate at the initial stage of core making, after core making ends, and loose flaky shells are prepared by substantially reducing the rotation speed and increasing pH; meanwhile, at the core-shell transition stage, a dispersant is added to effectively prevent agglomerationof the shells due to decrease of the rotation speed; S2, the prepared precursor and lithium salt are mixed and calcined once in the oxygen-rich atmosphere at the high temperature, and the monocrystalline type ternary cathode material is obtained. A battery is prepared from the ternary cathode material and has high capacity and good safety performance due to high lithium ion transport efficiency and reduced anisotropy in crystals. The problem of poor capacity of the material because of low lithium ion transport efficiency of monocrystalline type ternary materials is effectively solved. Besides,the monocrystalline type ternary cathode material is prepared through one-time sintering, the preparation procedure is simple, and the production cost is low.

Novel membranes based on functionalized porous inorganic materials for ion exchange and conduction have been synthesized and characterized. The preparation procedure of these new membranes involves the synthesis of porous inorganic films, into which hydrophilic moieties are incorporated along the interior pore surfaces of the inorganic framework. Ion-conducting species are grafted into the pores via reactions with surface groups of the inorganic framework to allow for ion transport through the pore network.

The invention discloses a method for preparing a functional polymer material, and belongs to the field of fiber material and plastic processing. The invention aims at solving the shortcomings of low efficiency and high cost of carrying out functionalization on traditional polymer materials by blending and surface chemical grafting. The method disclosed by the invention comprises the following steps: acting an alternating electric field on functional material particles to be physically embedded on the surface of an extruded base material of the polymer material, carrying out chemical crosslinking and physical blending on a crosslinking group and the surface of the base material of the polymer material, and blowing cold air to the base material of the polymer material for curing or blowing cold air to the base material of the polymer material for curing after stretching to obtain the functional polymer material. The selection range of functional substances in the method disclosed by the invention is very wide, the utilization rate is high, the effect is good, the dosage is small, the preparation procedure of the material is short, and the efficiency is high, so that the method can be widely used in the fields of the textile and garment industry, plastic industry, environmental management, drug extraction and the like.