503results about How to "Reduce the degree of oxidation" patented technology

The invention discloses a method for preparing large-size high-quality graphene with controllable number of layers, wherein graphite powder or flake graphite is mainly adopted as a raw material. The method specifically comprises the steps of intercalating the graphite raw material by virtue of an intercalating agent to initially weaken the intercalation interaction force and obtain different orders of graphite intercalation compounds (GICs); soaking the GICs in an appropriate expander, and then under the case that an auxiliary agent is added or not, enabling the intercalation materials to be quickly reacted with the expander to release a gases to obtain highly expanded wormlike graphene aggregate and further to cause the distances among graphene lamellar layers to be increased; and after certain processing, peeling, and then repeatedly centrifuging and dispersing to obtain a graphene dispersion with different numbers of layers. According to the method disclosed by the invention, the intercalation-expansion-peeling process is involved, raw materials are cheap, the reaction process is simple and easily controlled, and the number of layers of graphene is precisely controlled; the obtained graphene lamellar layers have the advantages of few defects, large size, high conductivity, high yield and the like, the large-scale industrial production is easily implemented, and the problems of high cost, low productivity, poor quality, small size, uncontrollable number of layers and the like in an existing graphene preparation technology are solved.

The invention discloses a method for electrochemically preparing graphene. The method comprises the following steps: 1, intercalating and expanding graphite paper by adopting graphite paper as a positive electrode and an aqueous intercalator solution as an electrolyte to obtain expanded graphite; 2, filtering and washing the expanded graphite, and carrying out ultrasonic peeling treatment on the expanded graphite to obtain a flocculent graphene slurry; and 3, filtering the graphene slurry, and drying the graphene slurry through adopting a microwave vacuum drier to obtain fluffy graphene powder. The electrochemical method solves the problem of use of heavy metal-containing reagents, strong acids, strong oxidants and expensive organic liquids in the graphene preparation process in the prior art, and has the advantages of simple preparation technology, low energy consumption and low cost.

The present invention discloses a low-cost high-strength anti-fatigue nonflammable wrought magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following chemical components in percentage by mass: 2.0-6.0% of Al, 1.5-4.0% of Ca, 0.2-0.8% of Mn, 0.1-0.8% of rare earth (RE), and the balance Mg and trace inevitable impurities, wherein the RE is one or more of cheap rare earth elements of La, Pr, Ce and Nd, and the content of the cheap rare earth is not zero simultaneously. The magnesium alloy provided by the present invention will meet the urgent need of users for high-performance materials, and the application of the magnesium alloy to magnesium alloy products, for example, load-bearing structural parts of aerospace, vehicles, rail trains and so on, structural parts of medical treatment, welfare and outdoor sport equipment, and parts (e.g., compressor scroll pans) having certain requirements for heat resistance and fatigue performance, is expanded.

A brazing sheet material for CAB brazing without applying flux. The brazing sheet material including an aluminum core alloy layer provided with a first brazing clad layer material on one or both sides of the aluminum core layer and at least one second brazing clad layer material positioned between the aluminum core alloy layer and the first braze clad layer material. The second brazing clad layer material is an Al—Si alloy brazing material having 5% to 20% Si and 0.01% to 3% Mg, and the first brazing clad layer material is an Al—Si alloy brazing material having 2% to 14% Si and less than 0.4% Mg. Also disclosed is a brazed assembly manufactured in a brazing operation.

The invention relates to a hydraulic extruding method for producing magnesium alloy wire or rod, and relative specific extruding mould, which can avoid crack and high cost or the like. The inventive method comprises that processing magnesium alloy blank, coating lubricant, and heating with era oil, heating hydraulic extruding mould and controlling temperature, arranging magnesium alloy blank, filling era oil, arranging movable convex mould, pressurizing and extruding. The inventive mould comprises a movable convex mould (26), under a convex mould (6) and coaxial with the convex mould (6), wherein the lower end of the convex mould (26) is through a convex mould through hole (8) at the middle of a convex mould press plate (17) to be mounted on the upper part of an extruding barrel (13), and the extruding barrel (13) is a multilayer cold press extruding one. The invention can obtain better physical property and surface quality, or the like.

The invention relates to a Zr-Co-Re thin film getter provided with a protection layer, and a preparation method thereof. The Zr-Co-Re thin film getter is composed of a getter layer and the protection layer; main components of the getter layer are Zr, Co, and one or more selected form rare earth elements La, Ce, Pr, and Nd; and main component of the protection layer is Ni. Pulsed laser deposition film plating is adopted, and deposition of the double-layer structured thin film getter containing the protection layer and the getter layer on texture monocrystalline silicon is carried out. The texture substrate is capable of increasing effective area of the getter thin film, and so that inspiratory flow rate and inspiratory capacity are increased. The surface of the getter layer is plated with a Ni protection layer; Ni is capable of realizing dissociation of hydrogen, and increasing absorption amount of hydrogen; and the Ni protection layer is capable of inhibiting absorption of oxygen and reducing activation temperature. Activation of the Zr-Co-Re thin film getter can be realized in roasting processes at a temperature of 180 to 350 DEG C; after roasting, the Zr-Co-Re thin film getter possesses excellent inspiration performance at room temperature, can be used for internal gas residue removing of high vacuum microelectronic devices.

The invention provides a nano hard alloy material containing spherical face-centered cubic structure cobalt powder and a preparation process thereof and belongs to the technical field of hard alloy preparation. The method comprises the steps of using 12-14 wt.% of the spherical face-centered cubic structure cobalt powder with the average grain diameter in a range of 200-300nm, 65-70 wt.% of tungsten carbide with the average grain diameter in a range of 200-300nm, 16-23 wt.% of tungsten carbide-titanium carbide-vanadium carbide-tantalum carbide-chromium carbide solid solution powder with the average grain diameter in a range of 300-400nm and a proper amount of an active and surface dispersing agent, and combining with airtight inert gases to protect high-speed ball milling, spray drying and overpressure sintering, so that sintering bodies are compact to the maximum extent, grain growth is restrained, the high-temperature performance of an alloy is optimized, and finally the high-hardness high-strength hard alloy material is obtained. The process is optimal in technology, easy to operate and applicable to industrial production.

The invention discloses a lycium ruthenicum beverage and a preparation method thereof and provides a beverage prepared by taking dried lycium ruthenicum fruit powder as a main raw material and a preparation method thereof. The lycium ruthenicum beverage is composed of following raw materials by weight percent: 0.1%-7% of the dried lycium ruthenicum fruit powder, 0.05%-3% of guar gum, 0.2%-7% of CMC-Na (Carboxyl Methyl Cellulose-Na), 0.05%-3% of xanthan gum, 3%-15% of erythritol, 0.006%-0.6% of stevioside, 0.01%-0.8% of citric acid, 0.01%-0.4% of sodium citrate, 0.01%-1.5% of tea polyphenol and the balance being water. The beverage is prepared by taking the dried lycium ruthenicum fruit powder as the main raw material; reasonable compatibility and synergistic effects of all the components are utilized and the color of a product is amaranth; the lycium ruthenicum beverage has a unique flavor, no astringent and mellow mouth feel, and has the effects of nourishing liver and kidney, replenishing vital essence to improve eyesight and nourishing blood, enhancing the immunity of people, beautifying, resisting oxidization, decaying aging, resisting fatigues, lowering blood pressure and lowering blood sugar.

The invention provides colored liquid metal and a manufacturing method thereof. A colored liquid metal raw material comprises a liquid metal body, pigment and/or nanometer conductive particles. The colored liquid metal can be presented in various specific colors while achieving electrical conduction. Firstly, the colored liquid metal has good electrical conductivity of liquid metal and rich colors of the pigment, an approach to color printed electronics can be opened up, and the aesthetic property and experience of the printed electronics can be remarkably promoted; meanwhile, the oxidation resistance and rust-proof property of traditional liquid metal are improved.

The invention relates to a preparation method of graphdiyne. The preparation method comprises that 1, in a nitrogen or argon protective atmosphere, a reaction substrate 1,3,5-tripropargylbenzene and a catalyst are put into a reaction container, a solvent is added into the reaction container to dissolve the materials in the reaction container, and the solution undergoes a heating reaction, 2, in the reaction process in the step 1, the solution is subjected to vacuum pumping process multiple times so that a reaction side product 2-butyne is removed and a solvent is supplied to make up for a loss of the solvent, and 3, after the reaction, the reaction product is purified so that the product graphdiyne is obtained. Compared with the prior art, the preparation method has simple processes. The prepared graphdiyne has the uniform surface and a low oxidation degree and can stably exist in air.

The present invention discloses probiotics enriched crisp apple products and a preparation method thereof, and belongs to the technical field of agricultural product processing. Apples are used as raw materials, the apples are washed, the washed apples are blanched, a vacuum soaking method is used to enrich probiotics into apple tissues, and then a vacuum freeze-drying and vacuum microwave combined drying method is used to prepare the probiotics enriched crisp apple products. The method comprises the following steps: (1) raw material washing and blanching; (2) probiotic soaking liquid preparing; (3) vacuum soaking; and (4) vacuum freeze-drying and vacuum microwave combined drying. The prepared probiotics enriched fruit and vegetable crisp products are mellow in fruit fragrance, and crisp and tasty. The viable probiotic number can be maintained at 10<7> CFU/g at 25 DEG C for 90 days or more. The preparation method avoids the two major defects of high cholesterol risk of the probiotic fermented milk products and the non-consumption of lactose intolerant population, and the products combine health care and leisure, and have broad market prospects.

The invention discloses an anti-oxidation medical hot-melt pressure-sensitive adhesive and a preparation method thereof. The anti-oxidation medical hot-melt pressure-sensitive adhesive comprises the following components: tackifying resin, a thermoplastic elastomer, a softening agent, an antioxidant group and a tackifier group, wherein the tackifying resin is hydrogenated petroleum resin, the thermoplastic elastomer is SBS/SIS, the antioxidant group comprises a phenolic anti-aging agent, a peroxide decomposing agent and an ultraviolet absorbent, and the tackifier group comprises at least one selected from rosin modified resin, terpene resin, a maleic anhydride grafted compatilizer, microcrystalline wax, dicyclohexyl phthalate and polyisobutene. According to the invention, harm is not causedto skins during peeling while the adhesive force of the product is further improved, and all the components are nontoxic and harmless, have no irritation to the skins, and have low allergenicity. Inaddition, the oxidation resistance of the product is greatly improved, the application range of the product is expanded, and the bonding reliability is further ensured.

The invention belongs to the technical field of medicines, and relates to a method for extracting astaxanthin from haematococcus pluvialis. The method comprises the steps of culturing a seed stock solution in a glass apparatus with a drainage system, and carrying out later amplification culture of the haematococcus pluvialis and accumulation culture of the astaxanthin after 10-15 d; centrifuging a culture in an exponential growth period of seed culture; and inoculating cell clusters in a BBM basal medium to obtain a primary culture. The later accumulation culture of the astaxanthin is amplification culture by using a breathable plastic bag type simple device provided by the invention. In the accumulation stage, a stress culturing method is adopted to obtain a lab-scale test haematococcus pluvialis culture; and haematococcus pluvialis powder is obtained by spray drying. According to a preparation technology that extracts astaxanthin from the haematococcus pluvialis by adopting an ultrasonic cell disruption assisted mixed solvent extraction method, the haematococcus pluvialis powder is added in an organic solvent to carry out ultrasonic cell disruption, and then the astaxanthin is obtained by the steps of reflux extraction in a water bath, suction filtration, filtrate merging and concentration. Compared with a conventional direct extraction method, the method provided by the invention saves extraction time, and increases astaxanthin yield.

The invention discloses a method for promoting growth of GOSS textures of silicon steel strips by using pulse current. The method comprises the following steps of: conveying the silicon steel strips at the speed of 2 to 10 meters per minute under the drive of a conveying device; and guiding the pulse current of a pulse power supply to a moving silicon steel strip electrifying zone through a pair of electric contact devices, and performing electric stimulation treatment on the silicon steel strip electrifying zone in air atmosphere to promote the generation of a large amount of GOSS textures in the primary re-crystallization process, wherein the silicon steel strips are in a high magnetic induction cold-rolled state, the thickness of the silicon steel strips is 0.1 to 0.5 millimeter, the width of the silicon steel strips is 10 to 150 millimeters and the silicon content of the silicon steel strips is 0.5 to 6.5 percent. Compared with the traditional thermal treatment furnace annealing treatment process, the method has the advantages of low energy consumption, high production efficiency and low production cost, and the GOSS textures in the primary re-crystallization process have manycomponents. By electron back-scattered diffraction (EBSD) detection, the GOSS texture content of the silicon steel strips treated by adopting electric stimulation of the pulse current reaches 15 to 25 percent.

The invention discloses a method for preparing a germinated black tartary buckwheat and hawthorn fruit vinegar beverage, and relates to the method for preparing beverages. The invention aims to solve the problems of the current method for preparing fruit vinegar beverages as follows: the functional ingredients seriously lose, the production cycle is long, the energy consumption is large, and the sensory flavor of product is not good enough. The method comprises the following steps: 1, screening; 2, cleaning; 3, soaking seeds; 4, germinating; 5, liquefying; 6, saccharifying uncooked materials; 7, preprocessing hawthorns; 8, squeezing juice; 9, conducting alcoholic fermentation; 10, conducting acetic fermentation; 11, mixing; 12, fining and clarifying; 13, sterilizing to obtain the germinated black tartary buckwheat and hawthorn fruit vinegar beverage. The method is mainly used for preparing the germinated black tartary buckwheat and hawthorn fruit vinegar beverage.

The invention relates to a method for using cheap fish enzyme to prepare flavouring material and fish oil, wherein said method comprises that: washing and breaking cheap fish into meat slurry; adding water at same mass, mixing into uniform fish slurry; putting it into enzymolysis pot, increasing temperature to 50-65Deg. C, adding 1000u/g-3000u/g excision protein enzyme and 1000u/g-3000u/g interior protein enzyme, mixing and enzymolyzing to liquidize the fish slurry; foaming at the bottom of pot, exhausting the air at upper part, increasing temperature to 85-90Deg. C when the enzymolysis is end, holding temperature for 15-30min to disinfect the enzyme; discharging fish skeleton and fish oil from the pot bottom, the left liquid is the final product. The invention can avoid forming emulsion layer abundant with fat and protein composite, with high protein utilization.

A method for preparing a metal composite plate/strip by rolling, comprises the following steps: 1) respectively rolling the composite surfaces of a base plate and a cladding plate to obtain the base plate corrugation and the cladding plate corrugation for mating with each other; 2) cleaning the composite surfaces of the base plate and the cladding plate to expose the metal matrixes; 3) sequentially laminating the base plate and the cladding plate so that the base plate corrugation on the base plate and cladding plate corrugation on the cladding plate mate with each other, compacting, and performing welding sealing treatment to obtain a composite plate slab; 4) rolling the qualified composite plate after inspection by using a compositing machine to a desirable thickness, to obtain a composite plate/strip.