36results about How to "Control the degree of oxidation" patented technology

The invention provides a preparation method for oxidized graphene-poly-dopamine composite aerogel. The preparation method comprises the following steps that 1, 0.15-0.7 g of dopamine powder is dissolved in 10-18 ml of distilled water, the dopamine aqueous solutions are mixed with 50-60 ml of oxidized graphene aqueous solutions with the concentration of 5-6 mg / ml, and stirring is performed to obtain oxidized graphene-dopamine mixed solutions; 2, 3-9 ml of tris aminomethane buffer solutions with the concentration of 0.1-0.12 mol / L are dropwise added into the mixed solutions while stirring is performed, stirring is continuously performed for 2-2.5 h, and standing is performed to enable the dopamine to be fully polymerized to obtain oxidized graphene-poly-dopamine composite aquogel; 3, after being placed in an environment with the temperature ranging from minus 20 DEG C to minus 10 DEG C to be frozen for 24-30 h, the composite aquogel is processed through freeze drying, and then the oxidized graphene-poly-dopamine composite aerogel is obtained. The method is simple in technology, and the prepared composite aerogel has the advantages of being high in porosity, excellent in adsorptivity, high in strength and the like.

The invention discloses equipment for preparing graphene oxide through microflow control. The equipment comprises a first raw material tank, a second raw material tank, a micro-mixer, a micro-channel reactor, a separation device, a graphene oxide collection device, an acid liquor collection device and a purification device, wherein the first raw material tank and the second raw material tank are respectively connected with a feed port of the micro-mixer, a discharge port of the micro-mixer is connected with a feed port of the micro-channel reactor, a discharge port of the micro-channel reactor is connected with the separation device, the graphene oxide collection device and the acid liquor collection device are respectively connected with the separation device, and the purification device is connected with the graphene oxide collection device.

The invention discloses a staged oil-frying and steaming technology of Cantonese braised pork. The staged oil-frying and steaming technology of the Cantonese braised pork comprises the following steps: removing hair, carrying out dicing, preparing pre-cooking soup, carrying out curing, injecting salt by puncturing, carrying out mixed oil-frying by using water and oil, carrying out mixed re-frying by using water and oil, carrying out steaming, and so on. The staged oil-frying and steaming technology of the Cantonese braised pork integrates cooking methods of traditional Chinese dishes and processing technologies of western meat products; during the oil-frying stage, the oil-frying is successively carried out at different temperature by adopting a water-oil mixed method, so that production of harmful materials can be effectively controlled during the oil-frying process so as to preserve good senses and flavors of the meat products to the maximum extent; moreover, vegetable fat, namely corn oil, is used as the oil for oil-frying in the staged oil-frying and steaming technology of the Cantonese braised pork, so that the oil-fried meat products are healthier, and better in edible properties.

The invention discloses a method for preparing graphene oxide through microfluidic control, which comprises the following steps: preparation of a first premixed solution: mixing graphite powder and a first intercalator to obtain the first premixed solution; preparing a second premixed solution, namely mixing an oxidizing agent and a second intercalator to obtain the second premixed solution; performing micro-flow mixing: feeding the first premixed solution and the second premixed solution into a micro-mixer for mixing to obtain a mixed suspension of graphite, an oxidizing agent and an intercalator; performing micro-flow reaction: feeding the mixed suspension into a micro-channel reactor for reaction; performing separation: preliminarily separating graphene oxide and an acid solution containing an oxidizing agent in a reaction mixture flowing out of the microchannel reactor, collecting the graphene oxide, and carrying out quenching reaction; and performing purification: washing the collected graphene oxide to finally obtain a high-purity graphene oxide aqueous dispersion liquid or a graphene oxide filter cake.

The invention discloses a preparation method of a thin-layer graphene oxide material. As preferable one of embodiments, the preparation method of the thin-layer graphene oxide material comprises the following steps of: sufficiently mixing graphene microchip, acid solvent and oxidant uniformly for reacting under a set temperature; and washing the mixture to be neutral and untrasonically treating the mixture to obtain the thin-layer graphene oxide material. A reducing agent is added to the thin-layer graphene oxide to carry out the reducing reaction to produce the reduced thin-layer graphene oxide material. Furthermore, the obtained thin-layer graphene oxide and the reduced thin-layer graphene oxide are dispersed in a solvent to obtain thin-layer graphene oxide dispersion liquid and reduced thin-layer graphene oxide dispersion liquid. The preparation method disclosed by the invention is simple in process, simple in needed equipment, safe and simple to operate, low in cost, strong in controllability, easy to realize large-scale industrial production, and capable of expanding the different application needs of the graphene oxide.

The invention discloses an arc smelting preparation method of an oxide-reinforced platinum-rhodium-based composite material. The arc smelting preparation method comprises the following steps that a platinum-rhodium alloy composite material ingot blank containing rare-earth Y powder and zirconium oxide powder is putted into an electric arc furnace to carry out electric arc smelting so as to obtaina button-shaped spindle; an X-ray fluorescence analyzer is used to measure whether the Zr content and the Y content on both sides of the spindle are uniform, wherein if the contents are not uniform, the bottom surface of the spindle is upward and arc smelting is carried out, and after smelting for many times, the Zr content and the Y content on both sides of the spindle are uniform; hot rolling iscarried out on the obtained spindle, and annealing treatment is then carried out; and then rolling, drawing and heat treatment are carried out to prepare a wire or sheet product, and an oxide-reinforced platinum-rhodium-based composite material product is obtained. The arc smelting preparation method has a simple preparation process, no pollution to the environment, controllable components of theprepared composite material, excellent comprehensive performance of the material and suitability for industrial production, and the obtained composite material can be applied to electric heating materials, electrode materials and the like.

The invention provides a method for preparing unconventional-refraction-index mixed film based on magnetron sputtering and belongs to the technical field of optical film. According to the method, a unconventional-refraction-index mixed material adopts pulse direct-current magnetron sputtering deposition, specifically, joint sputtering of a tantalum target material and silicon target material is conduced with a cathode, a radio frequency ion source is used for ionizing oxygen in the same cavity, and the tantalum target material and the silicon target material are made to jointly perform a reaction on the surface of a substrate to form the film. Since the film prepared by the adoption of magnetron sputtering has a higher structure than the film prepared through thermal evaporation, the durability and stability of the film prepared by the adoption of magnetron sputtering are excellent than the film layer deposited through thermal evaporation.

The invention provides a wear-resistant and corrosion-resistant protecting film and a preparation method and application thereof and belongs to the field of protecting materials. The wear-resistant and corrosion-resistant protecting film has a multilayered structure which successively comprises a metal Ta layer, a metal Ta and TaO2 mixed transitional layer and a TaO2 layer from the surface of a matrix and the surface of the film. The preparation method of the wear-resistant and corrosion-resistant protecting film comprises the following steps of depositing the metal Ta on the surface of the matrix by adopting an ion plating method to form a metal Ta film on the surface of the matrix; and irradiating the metal Ta film by adopting an atomic oxygen beam to form the wear-resistant and corrosion-resistant protecting film on the surface of the matrix, wherein energy of the atomic oxygen beam is 0.1-2 eV and the irradiation time is 30-120 min. The preparation method provided by the inventionis simple and easy to operate, and the prepared wear-resistant and corrosion-resistant protecting film has relatively good protecting performance to a titanium-based material.

The invention relates to the field of medicinal preparations, in particular to a dianhydrodulcitol lipidosome freeze-dried powder injection and a preparation thereof. The weight ratio of dianhydrodulcitol to phospholipids to cholesterol in dianhydrodulcitol lipidosome is 1:(5-40):(2.5-15). The weight ratio of dianhydrodulcitol to phospholipids to cholesterol is preferably 1:(10-30):(5-10). The encapsulation rate of the prepared dianhydrodulcitol lipidosome can be 85% or above, and the grain diameter of the prepared dianhydrodulcitol lipidosome is smaller than 200 nm. After administration, the medicine is rapidly absorbed, takes effect rapidly, and is accurate in quantification and convenient to use, the first-pass effect of the oral medicine is avoided, and the treatment effect and bioavailability are improved.

The invention relates to the field of medicinal preparations, in particular to a dianhydrodulcitol lipidosome freeze-dried powder injection and a preparation thereof. The weight ratio of dianhydrodulcitol to phospholipids to cholesterol in dianhydrodulcitol lipidosome is 1:(5-40):(2.5-15). The weight ratio of dianhydrodulcitol to phospholipids to cholesterol is preferably 1:(10-30):(5-10). The encapsulation rate of the prepared dianhydrodulcitol lipidosome can be 85% or above, and the grain diameter of the prepared dianhydrodulcitol lipidosome is smaller than 200 nm. After administration, the medicine is rapidly absorbed, takes effect rapidly, and is accurate in quantification and convenient to use, the first-pass effect of the oral medicine is avoided, and the treatment effect and bioavailability are improved.

The invention discloses a preparation method of a cross-linking antibacterial acellular matrix material. Oxidized chitosan quaternary ammonium salt is cross-linked with an acellular matrix material, multiple aldehyde groups on oxidized chitosan quaternary ammonium salt are cross-linked with active groups on the acellular matrix, the structural stability of the material is improved, meanwhile, chitosan quaternary ammonium salt is grafted in the acellular matrix material, and therefore excellent antibacterial and bacteriostatic performance is provided for the acellular matrix material. According to the method, cross-linking and providing of the antibacterial performance of the material are combined, the preparation method is a preparation method of the novel functional acellular matrix material, and the method can be widely applied to the field of biological materials.

The invention belongs to the field of pharmaceutical preparations, in particular to a long-chain fat emulsion injection containing olive oil and a preparation method thereof. The fat emulsion comprises an oil phase composed of olive oil, soybean oil and an emulsifier, an aqueous phase composed of water for injection and glycerin, an oleic acid stabilizer, a pH regulator and a fat-soluble antioxidant; the fat emulsion injection consists of water The phase and the oil phase are prepared by ultrasonic emulsification, and the average particle size is about 280±20nm. The invention solves the problems of uneven particle size distribution and oil floating in fat emulsion, greatly reduces the residual oxygen in the emulsion and the oxidation degree of oil phase components, increases the long-term stability of fat emulsion injection, and reduces the adverse effects of patients. reaction, increasing drug safety.

The invention discloses an arc smelting preparation method of an oxide-reinforced platinum-rhodium-based composite material, which comprises: putting a platinum-rhodium alloy composite material ingot containing rare earth Y powder and zirconia powder into an electric arc furnace, and performing arc smelting to obtain Button-shaped ingot; use X-ray fluorescence analysis instrument to measure whether the Zr and Y content on both sides of the ingot is uniform, if not, place the bottom of the ingot upwards and perform arc melting. After several times of melting, the Zr and Y content on both sides of the ingot will be uniform; The obtained ingot is hot-rolled and then annealed; then rolled, drawn and heat-treated to prepare a wire or sheet product to obtain an oxide-reinforced platinum-rhodium-based composite product. The invention has simple preparation process, no pollution to the environment, controllable composition of the prepared composite material, excellent comprehensive performance of the material, and is suitable for industrial production. The obtained composite material can be applied to electrothermal materials, electrode materials and the like.

An embodiment of the present invention provides a color metal comprising: a metal substrate comprising a first metal; an oxidation degree control pattern disposed on the metal substrate, the oxidationdegree control pattern increasing or decreasing the oxidation degree over time of the first metal; and a coating film disposed on the metal substrate on which the oxidation degree control pattern hasbeen disposed, wherein a first region of the metal substrate, on which the oxidation degree control pattern is present, and a second region of the metal substrate, on which the oxidation degree control pattern is not present, display different colors due to a difference in oxidation degree over time.

The invention discloses a continuous preparation and purification device for graphene oxide, which includes a reactor, a concentrated sulfuric acid solution storage bottle and a water / hydrogen peroxide storage bottle connected to the reactor through a delivery pipe, and a three-way valve is arranged on the delivery pipe. Directly below and directly above are correspondingly equipped with an ultrasonic plate, a feeder, a stirring paddle, and a first lifting platform connected to the reactor through a discharge pipe, and the discharge pipe is connected to the filter column through a second conveying pipe provided with a second peristaltic pump. The filter column is connected to the graphene oxide storage bottle through the third conveying pipe provided with the third peristaltic pump; the invention also discloses a preparation method of graphene oxide: the strong acid and the oxidant are separately fed and oxidized with graphite, and then stripped and purification to obtain graphene oxide. The device of the present invention is provided with a concentrated sulfuric acid solution storage bottle, a feeder, a reactor and a filter, and realizes the continuous preparation and purification of graphene oxide; the method of the present invention improves the preparation and purification efficiency of graphene oxide, and realizes concentrated sulfuric acid Solution recovery and continuous utilization.

The invention provides a method for preparing a non-conventional refractive index mixed thin film based on magnetron sputtering, which belongs to the technical field of optical thin films. In the present invention, the unconventional refractive index mixed material is deposited by pulsed DC magnetron sputtering, specifically, the cathode is used to jointly sputter tantalum and silicon targets, and a radio frequency ion source is used to ionize oxygen in the same chamber, so that they are jointly deposited on the surface of the substrate. Reaction film. Because the thin film prepared by magnetron sputtering technology has a denser structure than that of thermal evaporation, its durability and stability are better than those of thermal evaporation deposition.