253results about How to "Reduce oxidation" patented technology

The invention relates to the technical field of lithium iron phosphate production, and discloses a carbon-coated titanium-doped lithium iron phosphate positive electrode material and a preparation method thereof.The preparation method comprises the following steps that 1, a ferrous solution and a phosphorus source solution are mixed in proportion, dopamine hydrochloride is added, a pH regulator is dropwise added in the stirring state, the pH of the solution is adjusted to 4.0-5.5, a reaction is conducted, a titanium source solution is added, and a reaction solution is obtained; after uniformly stirring, continuously dropwise adding a pH regulator to regulate the pH value of the solution to 5.5-6.5; the iron phosphate octahydrate coated with the titanium-embedded polydopamine is obtained; 2) calcining the titanium-embedded polydopamine-coated ferrous phosphate octahydrate in an inert gas atmosphere to obtain carbon-coated titanium-doped anhydrous ferrous phosphate; 3) mixing the carbon-coated titanium-doped anhydrous ferrous phosphate with lithium phosphate and a carbon source, ball-milling, mixing, spray-drying and calcining to obtain a carbon-coated titanium-doped lithium iron phosphate positive electrode material; the synthesis process is simple, and energy consumption is reduced.

The invention discloses a low-carbon magnesia-carbon refractory material for clean steel smelting and a preparation method thereof, and relates to the technical field of magnesia-carbon refractory materials. The low-carbon magnesia-carbon refractory material comprises the following components: 40-50 wt% of fused magnesite with the particle size of 3-5 mm, 20-30 wt% of fused magnesite with the particle size of 1-3 mm, 10-20 wt% of fused magnesite with the particle size of less than or equal to 74 [mu] m, 8-12 wt% of silicon powder, 1-3 wt% of alumina powder and 3-5 wt% of crystalline flake graphite. 2-4 wt% of a composite additive and 4-6 wt% of phenolic resin are added; the composite additive comprises andalusite and mullite. The material has excellent mechanical properties, thermal shock resistance, oxidation resistance and erosion resistance; the preparation method has the characteristics of low cost and simple process, and the prepared low-carbon magnesia carbon refractory material has excellent oxidation resistance, thermal shock resistance and slag resistance by exerting the phase volume expansion effect and intergranular phase enhancement effect of the multiphase ceramic; the used graphite is low in content, graphite consumption and molten steel recarburization risk can be reduced, and the method is suitable for smelting clean steel.

The invention discloses injectable hydrogel for eye drug sustained release and a preparation method and application thereof.The method comprises the steps that a NaIO4 solution is dropwise added into a hyaluronic acid solution, after the reaction is conducted in a dark place at the room temperature, ethylene glycol is added for continuous reaction, and formylated hyaluronic acid is prepared; the preparation method comprises the following steps: adding adipic dihydrazide into a carboxymethyl cellulose solution, uniformly stirring at room temperature, adding 1-hydroxybenzotriazole and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and stirring to react, so as to prepare aminated carboxymethyl cellulose; and mixing the PBS solution of aminated carboxymethyl cellulose with the PBS solution of formylated hyaluronic acid, uniformly stirring, adding a to-be-carried drug and a FeCl3 solution, and carrying out a reaction to prepare the injectable hydrogel for sustained release of the eye drug. The hydrogel is convenient to use and high in gelation rate, effectively realizes controllable release of drugs, and has a wide application prospect in the field of biological medicines.

The invention belongs to the technical field of welding, and discloses a dissimilar metal power modulation galvanometer laser welding method which comprises the following steps: finely cleaning a 6061 aluminum alloy and a 304 stainless steel plate by using acetone, and then airing for more than 20 minutes; the aluminum steel sheet is assembled, pressed and fixed on a welding test platform in a steel-up-aluminum-down mode; the position of the welding test platform is adjusted, argon serves as welding protection gas, and a protection gas nozzle is arranged to be aligned with a welding pool area; laser welding parameters are set, a laser power modulation mode is set to be a gradient power mode, and the gradient power mode is to regulate and control phase point laser power in a circular scanning track in the advancing direction of a welding seam; a welding test is carried out in the mode that a galvanometer laser head is fixed and a welding test platform is moved, and a laser and the welding test platform are synchronously started and stopped; and the protective gas is started 5 seconds before the laser is started, and after the laser is stopped, the protective gas is stopped lagging for 10 seconds so as to continuously protect the welding seam and prevent oxidation.

The invention provides anti-aging collagen peptide mask liquid and a preparation method thereof. The mask liquid is prepared from the following components in percentage by mass: 1 to 2 percent of tremella polysaccharide, 3 to 4 percent of herba portulacae extract, 2 to 3 percent of radix gentianae extract, 0.3 to 0.8 percent of nicotinamide, 1.2 to 1.6 percent of alpha-arbutin, 0.2 to 0.6 percent of chrysanthellum indicum extract, 0.7 to 1.5 percent of geranium flower / leaf / stem extract, 0.4 to 0.8 percent of aloe barbadensis extract, 0.7 to 1.3 percent of radix sophorae flavescentis extract, 0.3 to 0.9 percent of herba houttuyniae extract, 1.2 to 1.7 percent of herba centellae extract and the balance of water. The traditional Chinese medicine composition is prepared from the following raw materials in percentage by weight: 0.2 to 0.6 percent of fructus hippophae extract, 0.02 to 0.06 percent of peony root bark extract, 0.06 to 0.09 percent of scutellaria baicalensis root extract, 0.04 to 0.08 percent of rosemary extract, 0.01 to 0.04 percent of pearl powder and the like. The mask liquid prepared by the invention has an anti-aging effect.

The invention belongs to the technical field of keel bending, and particularly relates to an automatic bending device for a light steel joist, which comprises a conveyor, a bending assembly is arranged above the conveyor, and the device is provided with the bending assembly, so that the light steel joist can be attached to the surface of the bending assembly to be subjected to pre-deformation bending treatment; the light steel joist is subjected to small-angle deformation before formal bending treatment, so that the resilience after edge folding can be reduced, the residual stress in the light steel joist can be released, the possibility of quality problems such as deformation and cracking caused by stress concentration is reduced, the structural strength and durability of the light steel joist are enhanced, and the service life of the light steel joist is prolonged. The stability and reliability of the whole structure are guaranteed, the internal stress distribution is more uniform and reasonable, so that the machining precision and the product quality are improved, the bending consistency of the light steel keel is guaranteed, manual intervention is not needed, the automation degree of the bending process is greatly improved, the labor intensity is relieved, and the production efficiency is improved.

The invention provides a preparation method of a semiconductor structure, and particularly relates to the technical field of semiconductors. The preparation method of the semiconductor structure comprises the steps that a substrate is provided, the substrate comprises a substrate body, a pad oxide layer, a first pad nitride layer and a plurality of groove isolation structures, the pad oxide layer covers the portion, between every two adjacent groove isolation structures, of the substrate body, the first pad nitride layer covers the surface of the pad oxide layer, and the groove isolation structures are at least partially exposed out of the substrate body; removing the first pad nitride layer; performing ion implantation on the substrate; carrying out thinning treatment on the pad oxide layer; forming a second pad nitride layer on the surfaces of the trench isolation structure and the pad oxide layer; etching the second pad nitride layer, the pad oxide layer and the substrate by taking the patterned photoresist as a mask so as to form an opening in the substrate; and performing thermal oxidation treatment on the substrate in the opening to form an oxide layer. By adopting the preparation method of the semiconductor structure, the speed of a semiconductor device can be increased, and the circuit performance of the semiconductor device can be improved.

The invention discloses a high-quality laser welding manufacturing device and a high-quality laser welding manufacturing method, which solve the problems of concentrated energy distribution, small inherent focal depth, insufficient depth-diameter ratio of welding and insufficient welding thickness of the existing ultrafast laser welding technology. The zoom collimation system, the cone mirror, the acousto-optic modulation unit and the long focal depth compression unit are sequentially arranged on a light path where the welding laser is located in the emergent direction of the welding laser. The zoom collimation system is used for changing the spot diameter of the welding laser and collimating the spot diameter; the cone mirror is used for shaping the welding laser subjected to diameter-variable collimation into long-focal-depth laser; the acousto-optic modulation unit divides the long-focal-depth laser into N sub-beams and adjusts the spatial position of each sub-beam, and N is a positive integer greater than or equal to 1; and the long focal depth compression unit is used for adjusting the spot diameter and focal depth length of each sub-beam, so that the focal position and energy of each sub-beam are suitable for laser welding.

The invention relates to the technical field of daily chemicals, in particular to a dark tea extract containing eurotium cristatum composite strains for solid aerobic fermentation. The composite strains comprise eurotium cristatum and saccharomycetes. The dark tea extract provided by the invention is stable in performance and not easy to discolor, contains components such as polysaccharide, amino acid and mineral substances, and can help skin moisturize. The permeability of the components is enhanced in the fermentation process, moisture can be locked on the surface layer of the skin, and the moisture degree of the skin is kept. The skin care product has very strong antioxidant capacity, and can neutralize free radicals, slow down the oxidation process of skin, delay skin aging and reduce wrinkles and fine wrinkles. A certain calming effect can be achieved on the skin which is prone to redness and itching or has slight inflammation.

The invention relates to the technical field of lithium ion batteries, in particular to an electrolyte, a preparation method thereof, an injection method and a lithium ion battery, the electrolyte comprises a first electrolyte for first injection and a second electrolyte for second injection, the first electrolyte comprises a first solvent, a first lithium salt and a first additive, the second electrolyte comprises a second solvent, a second lithium salt and a second additive, the first electrolyte comprises a first solvent, a first lithium salt and a first additive, the second electrolyte comprises a second solvent, a second lithium salt and a second additive, the mass percentage of the second electrolyte in the electrolyte is 5-20%, the first additive comprises dimethyl sulfide and vinylene carbonate, and the second additive comprises triphenyl phosphate and vinylene carbonate. According to the electrolyte, the first additive comprises dimethyl sulfide, and the second additive comprises triphenyl phosphite, so that the bad problems of high-temperature gas production and negative electrode interface black spots in the use process of a lithium-rich material lithium supplementing agent are solved.

The invention belongs to the technical field of metal adsorption material preparation, and particularly relates to a preparation method of an attapulgite composite cellulose hydrogel material, which comprises the following steps: (1) uniformly dispersing acid modified attapulgite in water, then adding sodium alginate and polyvinyl alcohol, heating and stirring; (2) adding sodium carboxymethyl cellulose, and continuously stirring to obtain a mixed solution; and (3) injecting the mixed solution into a mold by using an injector, freeze-thawing, freeze-drying, immersing into a CaCl2 solution, cross-linking, washing for multiple times, and freeze-drying again to obtain the attapulgite composite cellulose hydrogel material. Sodium alginate, polyvinyl alcohol, sodium carboxymethyl cellulose and acid modified attapulgite in a proper proportion are matched with a multiple freeze drying method to construct a three-dimensional structure with multiple chemical adsorption, high specific surface area, long diffusion channel and abundant pores, so that the adsorption efficiency and the adsorption capacity of the composite material are improved, and various application requirements are met.

The utility model discloses a pressing cover type toona sinensis pickle quick pickling device which comprises a placing frame, a supporting frame fixed at the upper end of the placing frame and a containing box nested in the placing frame, and further comprises a mounting cover mounted on the upper side of the containing box, the cover plate is mounted on the lower side of the mounting cover and is used for extruding the cedrela sinensis in the containing box; and the lifting plate is mounted on the upper side of the mounting cover, and a hydraulic telescopic rod is fixed to the lower end of the lifting plate. According to the pressing cover type quick pickling device for the pickled cedrela sinensis, the cedrela sinensis needing to be pickled is contained in the containing box, during pickling, the cedrela sinensis in the containing box is extruded through the cover plate, the flavor and taste of the cedrela sinensis after being mixed with seasoning are improved, meanwhile, when the cover plate extrudes the cedrela sinensis, the cedrela sinensis can be conveniently pickled, and the taste of the cedrela sinensis is improved. And part of redundant air in the containing box can be discharged from the air outlet barrel, so that the air in contact with the cedrela sinensis in the pickling environment is reduced, the oxidation of the cedrela sinensis is reduced, and the flavor and taste of the pickled cedrela sinensis are further improved.

The invention provides a 3D glass hot bending forming technology, and relates to the technical field of 3D glass preparation, and the 3D glass hot bending forming technology comprises the following steps: 1, designing and cutting plate glass according to 3D glass, and carrying out CNC finish machining, washing and drying to obtain plate original glass; step 2, loading the dried plate original glass into a mold, and preheating the plate original glass step by step in a multi-stage preheating station; 3, after the preheated and heated mold is moved to a hot pressing station, 3D glass in a preset shape is obtained by adjusting the temperature of an upper pressing plate and a lower pressing plate and adjusting the pressing speed and the load of the upper pressing plate; 4, the hot-pressed 3D glass mold is moved to annealing stations, and the minimum resilience effect of the 3D glass is achieved through step-by-step cooling of the multi-stage annealing stations; and step 5, taking out the 3D glass, cooling, cleaning, laminating, and finishing. The method is used for solving the technical problems that a traditional 3D glass hot bending process is difficult to meet the specification requirement that the size precision of a product is lower than 0.2 mm, and concave and convex points exist on the surface of the glass, and further grinding and polishing are needed.

The invention discloses a method for simultaneously extracting starch and protein and application thereof. The invention belongs to the technical field of corn deep processing. The invention aims to solve the technical problems that the existing method is low in production efficiency and the obtained corn starch and corn protein are poor in processing characteristic and digestion characteristic. The method comprises the following steps: (1) performing vacuum low-temperature alkalization cooking on corn kernels in a calcium hydroxide solution; (2) performing ultrasonic-high static pressure cooperative treatment after cooking, and then soaking; (3) performing coarse grinding on the soaked corn kernels, then performing fine grinding, and performing enzymolysis with compound protease; and (4) finely grinding, filtering, standing, centrifuging, washing with water, precipitating, respectively collecting a lower-layer white part and an upper-layer yellow part, and freeze-drying to respectively obtain the corn starch and the corn protein. The method improves the processing characteristics of starch and the digestion characteristics of protein, and can be applied to development and production of high-quality corn starch or corn protein-based food.

The invention relates to the technical field of power grids, and discloses a horizontal flywheel energy storage system and a system control method, and the system comprises a flywheel energy storage unit, a first-stage connector, a double-fed motor and a system control unit. The flywheel energy storage unit is rigidly or flexibly connected with a rotor of the doubly-fed motor through the primary connector; a stator of the double-fed motor is electrically connected with an alternating current power grid; the system control unit is electrically connected with the flywheel energy storage unit, the primary connector and the double-feed motor; wherein the flywheel energy storage unit, the primary connector and the doubly-fed motor are all horizontally arranged, and the flywheel energy storage unit adopts vacuum sealing. The flywheel energy storage unit, the first-stage connector and the double-fed motor are all arranged in a horizontal mode, a larger and heavier flywheel rotor can be supported, the rotational inertia of the flywheel rotor is increased, and then the capacity of the horizontal flywheel energy storage system for providing the rotational inertia for an alternating current power grid is improved.

The invention belongs to the technical field of semiconductors, and particularly relates to a polishing composition and a preparation method and application thereof. The polishing composition comprises grinding particles, an oxidizing agent, an organic dispersing agent, an inorganic dispersing agent, a pH buffering agent, a pH adjusting agent and water. Wherein the oxidizing agent comprises permanganate, the organic dispersing agent forms an organic coating layer on the surface of the grinding particles, and the inorganic dispersing agent forms an inorganic coating layer on the surface of the organic coating layer. Through the steric hindrance of the organic dispersing agent and the static stable synergistic effect of the inorganic dispersing agent, the grinding particles obtain a good dispersing effect. Meanwhile, the outer surface of the organic coating layer is coated with the inorganic coating layer, so that oxidative damage of a strong oxidant to organic dispersant molecules of the organic coating layer can be prevented, and the dispersion stability and the polishing stability of the polishing composition are improved. Therefore, the polishing composition containing the grinding particles can continuously obtain low-defect and low-roughness surfaces when processing third-generation semiconductor materials.

The invention discloses a high-temperature oxidation resistant coating as well as a use method and application thereof. The solute of the coating comprises 33%-40% of Al2O3, 42%-49% of SiO2, 8%-14% of Fe3O4, 3%-8% of SiC and 5%-7% of (Y2O3 + ZrO2), the proportion of Y2O3 in the (Y2O3 + ZrO2) is 5%-9%, and a solvent is distilled water. When the coating and the using method are applied to homogenization pretreatment of the nickel-based superalloy, the homogenization treatment time of the superalloy in a heat treatment furnace can be effectively prolonged, erosion and oxidation of high-temperature furnace gas to the surface of a steel ingot are avoided, subcutaneous oxidation cracks and element depletion are reduced, and the quality of the steel ingot is improved. And the method has positive influence on the surface grinding efficiency of the homogenized steel ingot, tool loss and other procedures.

The invention relates to the technical field of food packaging, in particular to an antibacterial fresh-keeping packaging film for food packaging and a preparation method of the antibacterial fresh-keeping packaging film, and aims at solving the problems that a traditional food packaging film is insufficient in antibacterial performance and not ideal in fresh-keeping effect. According to the preparation method, polyethylene resin and polylactic resin are taken as main raw materials, so that the packaging film is endowed with excellent mechanical property and barrier property, the oxidation process of food can be slowed down, the damage of oxygen to the food is reduced, the loss of nutritional ingredients in the food is prevented, and the freshness and nutritional ingredients of the food can be effectively kept; the modified nano-silver particles are added into the food, so that the growth and metabolic activities of microorganisms such as various bacteria and molds can be effectively inhibited, the risk that the food is polluted by the microorganisms is remarkably reduced, the deterioration of the food due to microbial decomposition is avoided, and the food quality is improved. Therefore, the quality and taste of the food are better maintained, and the shelf life of the food is prolonged.

The invention belongs to the technical field of metal materials and radiation protection, and particularly relates to a preparation method of thermal neutron shielding steel. According to the method, efficient spray forming of the B4C / 304 stainless steel composite material is achieved through a gas-solid two-phase flow driving mechanism under the negative pressure environment, B4C ceramic particles are evenly dispersed and embedded into a 304 stainless steel matrix, and due to the strong driving force of gas-solid two-phase flow, firm interface bonding is formed between the B4C particles and the matrix. According to the process, gas atomization and solid-phase medium particles are combined, a gas-solid two-phase mixed flow is formed, the atomization efficiency is greatly improved, the powder particle size is refined, reinforced phase distribution is optimized, and a new way is opened up for preparation of the high-performance thermal neutron shielding steel composite material.

The invention discloses a food packaging film sealing machine, and relates to the technical field of film sealing machines, the food packaging film sealing machine comprises a film sealing rack, the top of the film sealing rack is provided with a belt conveying rack, the top of the inner side of the film sealing rack is fixedly connected with two sets of suspension brackets, and the inner side of each set of suspension bracket is rotationally connected with a fixed roller; and a packaging film is wound between the two fixed rollers. According to the food packaging box, through cooperation of parts such as the gas outlet channel, inert gas is input into the gas outlet channel from the hose and then blown out of the gas outlet of the gas outlet channel, water stains and other stains on the surface of the food packaging box are removed, and the clean surface is beneficial to tight attachment between the packaging film and the food packaging box; the purging of the inert gas ensures that no impurity interference exists in the packaging area, so that the heat sealing head can uniformly and effectively heat and press the packaging film, and the sealing performance and firmness of packaging are improved.

The invention relates to the technical field of preparation of silicon carbide ceramics, in particular to an in-situ reaction sintered silicon carbide ceramic and a preparation method thereof.The preparation method comprises the following technological stages which are conducted in sequence: S1, preparation of silicon carbide slurry, specifically, organic matter precursor raw materials are weighed according to the mass content percentage to form the silicon carbide slurry; s2, vacuum grouting: injecting the silicon carbide slurry in the vacuum grouting tank into the shaping mold from the bottom of the shaping mold to form a silicon carbide green body; and S3, in-situ reaction sintering is conducted, specifically, the silicon carbide green body is placed in a sintering furnace, heating, heat preservation and cooling are conducted on the silicon carbide green body in the argon atmosphere through a segmented temperature control technology, and the silicon carbide ceramic is obtained. The silicon carbide ceramic prepared by the method disclosed by the invention has relatively high density and excellent mechanical properties.

The utility model belongs to the technical field of agricultural product preservation, and particularly relates to a lotus root anti-brown spot preservation container which comprises a base, a splicing bin and a bin cover, a filling bin filled with natural antioxidants and microbial inhibitors is arranged in the splicing bin, and the lotus root anti-brown spot preservation container can inhibit the activity of phenol oxidase, prevent brown spots, inhibit the growth of mould and bacteria and delay lotus root decay; a sponge mat is arranged at the bottom of the container to absorb excessive moisture, keep dry and further prevent mould breeding; a microporous membrane is arranged between the splicing bin and the bin cover, gas exchange is allowed, microorganisms are prevented from entering, the concentration of oxygen and the concentration of carbon dioxide are controlled, and the preservation effect is enhanced; the quick-release lock catch structural design enables the container to be mounted and dismounted more conveniently and quickly, the air holes are formed in the partition pieces, air circulation is ensured, a suitable storage environment is provided, and the overall design is efficient, environmentally friendly and easy and convenient to operate.

The invention relates to the field of marine food manufacturing, in particular to high-protein-content soy sauce and a preparation method thereof, and the high-protein-content soy sauce comprises the following raw materials: laminarin, modified anthocyanin, compound protein, docosahexaenoic acid, astaxanthin, taurine, carrageenan, beta-amylase, soybeans, salt and purified water. The laminarin, the modified anthocyanin and the compound protein play a role through a synergistic effect, the compound protein in the soy sauce is wrapped by the modified anthocyanin to form a compound, a laminarin film is tightly attached to the outer layer of the compound formed by the modified anthocyanin, and the wrapping capacity and the structural stability of the compound are further enhanced; meanwhile, the oxidation process of fat and protein in the soy sauce is slowed down, the modified anthocyanin and a laminarin film interact to maintain the protein content in the soy sauce, laminarin, the modified anthocyanin and compound protein form a dynamic balance system, the nutritional value and quality of the soy sauce are improved, and the soy sauce with high protein content is provided.

The invention discloses an aluminum-scandium alloy and a preparation method and application thereof, and belongs to the technical field of rare earth alloy sputtering target materials, metal aluminum particles and metal scandium particles are used as raw materials, high vacuum is extracted, inert gas is introduced for multiple times of electric arc melting, aluminum-scandium alloy melt with uniform components is obtained, and after the aluminum-scandium alloy melt is cooled, the aluminum-scandium alloy is obtained. The method comprises the following steps: preparing an aluminum-scandium alloy ingot, carrying out induction heating on the aluminum-scandium alloy ingot prepared by electric arc melting to completely melt the alloy so as to obtain an alloy melt, guiding the alloy melt to be injected into a mold through an argon pressure difference, naturally cooling to form a primary alloy, and carrying out homogenizing annealing on the primary alloy under a vacuum condition to obtain the aluminum-scandium alloy. And eliminating the residual internal stress of the primary alloy to obtain the aluminum-scandium alloy. The aluminum-scandium alloy prepared through the method is low in oxygen content, high in density, fine in crystal grain, uniform in structure and good in machining performance.

The invention relates to the technical field of pharmaceutical preparations, and discloses a preparation method of an acetylcysteine injection for terminal sterilization, which is characterized in that the oxygen content and hydrogen sulfide content in liquid medicine are reduced by vacuumizing and nitrogen charging, and the appropriate pH is adjusted to make related substances meet the requirements, so that the sterilized acetylcysteine injection with high quality and stability is prepared. The method solves the problem that hydrogen sulfide and related substances in the acetylcysteine injection exceed the standard.

The invention discloses a lutein-loaded functional hollow salt and a preparation method thereof, the functional hollow salt is prepared by taking a Maillard reaction product of whey protein isolate and maltodextrin as a salt carrier, mixing the salt carrier with lutein-loaded vegetable oil and carrying out spray drying, the weight percentage of sodium chloride in the functional hollow salt is greater than 50% and less than or equal to 85%. The particle size of the hollow salt is 1 / 10 of that of common salt. The reduction of the particle size generally shows that a denser particle structure is formed in the spray drying process, so that the exposure of active ingredients can be reduced, the possibility of oxidation or photolysis is further reduced, and the stability of the ingredients is improved; through comparison of sensory evaluation, it is found that when the same salty taste feeling is achieved, 20-30% of salt can be reduced in the hollow salt; the lutein-loaded hollow salt prepared by the invention is relatively dispersed, has no adhesion phenomenon, and can be stored for a long time under a certain condition.

The invention discloses a composite antioxidant enhancer containing rosmarinic acid and a preparation method of the composite antioxidant enhancer, relates to the technical field of food, and aims to solve the problem that the existing food fresh-keeping antioxidant in the prior art is relatively single in component and incomplete in antioxidant capacity, so that the effect in daily food fresh-keeping is not very good. Comprising the following components: 5% of rosemary essential oil, 20% of tea polyphenol, 15% of aloe polysaccharide, 5% of curcumin, and the balance of food-grade glycerin as a carrier, the composite antioxidant enhancer is prepared through an enhancer preparation device, and the enhancer preparation device comprises a mixing tank. The lower ends of the multiple fixing rods extend to the lower end in the mixing tank and are jointly and fixedly connected with a shearing pipe, the middle of the lower end of the supporting plate is rotationally connected with a rotating pipe, and the lower end of the rotating pipe extends to the upper end in the shearing pipe and is fixedly connected with a first spiral blade; the lower end of the rotating shaft extends out of the lower end of the rotating pipe and extends to the lower end in the shearing pipe to be fixedly connected with a third spiral blade.

The invention relates to a heat-treatment-free high-toughness aluminum-magnesium-silicon alloy and a preparation method thereof, belongs to the technical field of aluminum alloys, and solves the problems that a heat-treatment-free aluminum alloy in the prior art is not high in toughness and cannot meet the production of large thin-wall components. The invention relates to a heat-treatment-free high-toughness aluminum-magnesium-silicon alloy, which comprises the following elements in percentage by mass: 7 to 9 percent of Mg, 2 to 3 percent of Si, 0.1 to 0.4 percent of Mn, 0.05 to 0.2 percent of Ti, 0.05 to 0.1 percent of Zr, 0.01 to 0.05 percent of B, 0.01 to 0.1 percent of Cu, 0.05 to 0.2 percent of Zn, 0.05 to 0.1 percent of Ca, 0.05 to 0.1 percent of RE, 0.003 to 0.005 percent of Be, 0 to 0.15 percent of Fe, less than or equal to 0.15 percent of other uncontrollable impurity elements and the balance of Al. And preparation of the heat-treatment-free high-toughness aluminum-magnesium-silicon alloy is achieved.

The invention relates to the technical field of natural product extraction, in particular to a process for separating and extracting nervonic acid from xanthoceras sorbifolia bunge. The preparation method comprises the following steps: extracting xanthoceras sorbifolia bunge kernels to prepare xanthoceras sorbifolia bunge oil; the xanthoceras sorbifolia bunge oil is filtered and refined through a composite polyethersulfone membrane, and mixed fatty acid is prepared; mixing fatty acids to prepare nervonic acid. Molybdenum disulfide and lithium fluoride treated by hydrochloric acid are jointly dispersed in a solution, and after a composite nano material prepared through treatment of molybdenum disulfide and lithium fluoride is used for treating a polyether sulfone membrane, the obtained composite polyether sulfone membrane does not generate pollution and has an adsorption effect on impurities in xanthoceras sorbifolia bunge oil; when the xanthoceras sorbifolia bunge oil is filtered by the polyether sulfone membrane, other impurities are adsorbed, the xanthoceras sorbifolia bunge oil is refined, the content of an extraction solvent and other impurities in the xanthoceras sorbifolia bunge oil is reduced, and the extraction rate and purity of nervonic acid extracted from the xanthoceras sorbifolia bunge oil are improved.

The invention provides a method for reducing the interface state density of a SiC-MOS device and an MOS capacitor. The method comprises the following steps: providing a silicon carbide substrate; forming a silicon dioxide oxide layer on the silicon carbide substrate; pure oxygen annealing is carried out by adopting a rapid annealing process; pure nitrogen annealing is carried out by adopting a rapid annealing process; forming a gate electrode on the silicon dioxide oxide layer; and forming a substrate electrode at the bottom of the silicon carbide substrate to obtain the SiC-MOS capacitor. According to the invention, the two-step annealing process of low-pressure pure oxygen annealing and pure nitrogen annealing is carried out on the silicon dioxide (SiO2) / silicon carbide (SiC) interface, so that the device has relatively low interface state density and relatively high flat-band voltage stability.