29results about How to "Reduce decomposition rate" patented technology

The invention discloses a preparation method and application of a magnesium-aluminum hydroxide composite flame retardant, and relates to the technical field of flame retardancy. The preparation method comprises the following steps: mixing magnesium hydroxide and aluminum hydroxide in proportion, adding the mixture into a modified liquid for pretreatment; dispersing the mixture into DMF, dropping protocatechuic aldehyde into the mixture under stirring, introducing nitrogen, and reacting to obtain Schiff-alkalized magnesium hydroxide / aluminum hydroxide; dispersing the mixture into DMF, adding DOPO under stirring, and reacting to obtain a magnesium hydroxide / aluminum hydroxide composite flame retardant; the composite flame retardant contains three flame retardant elements, namely, N, P, and Si, and generates non-combustible gases such as N2 and NH3 to dilute the gas phase during combustion, and also generates groups such as P-O-P, Si-O-Si, and Si-C, so as to form a high-strength and dense silicon layer and carbon layer on the surface of a polymer, effectively reducing the heat conduction speed, isolating oxygen, and slowing down the escape of combustible gas, thereby reducing the decomposition rate of the resin and slowing down the combustion rate.

The invention discloses a method for preparing a tin-based perovskite solar cell through a double-stage reduction strategy. The method comprises the following steps that S1, a hole transport layer is prepared on an anode substrate; s2, stannous fluoride, formamidine hydriodate, p-fluorophenethyl ammonium bromide, stannous iodide and thiosulfate are dissolved in an organic solvent for a reaction, a perovskite solution is obtained, the hole transport layer is coated with the perovskite solution, and a perovskite layer is obtained; s3, preparing an electron transport layer on the perovskite layer; and S4, sequentially preparing a hole barrier layer and a cathode electrode on the electron transport layer to obtain the tin-based perovskite solar cell. According to the method, the decomposition rate of the perovskite thin film under air and illumination is reduced, sustainable dynamic reduction is achieved by taking thiosulfate as an additive, and the storage stability and the operation stability of the tin-based perovskite solar cell are greatly improved through the dynamic sustainable behavior.

The invention relates to the technical field of emulsion in water, in particular to a saflufenacil-containing emulsion in water and a preparation method thereof. The saflufenacil suspending agent is prepared from the following raw materials in percentage by mass: 5-30% of saflufenacil, 10-40% of a solvent, 3-5% of an emulsifier, 3-5% of an anti-freezing agent, 0.01-0.1% of a defoaming agent, 0.1-1% of a stabilizer and the balance of water. The water emulsion containing the saflufenacil provided by the invention has good high-temperature storage stability, the decomposition rate of the saflufenacil is less than 5%, and the shelf life of 2 years is met; the dispersing and diluting properties in water with different hardness are good; the anti-flying agent is simply mixed with other dosage form products for use before flying prevention, the barrel mixing compatibility is good, and the abnormal problems of flocculation, layering and the like are not prone to occurring.

The invention relates to a herbicide composition and a preparation method thereof, and relates to the technical field of agricultural herbicides, and the herbicide composition is prepared from the following raw materials in parts by mass: 40-50 parts of a herbicide drug-loading system, 3-5 parts of carbon black, 0.5-1 part of an anti-ultraviolet agent, 0.5-1 part of an antioxidant, 5-15 parts of a compound high-dispersity emulsifier and 10-15 parts of filler. The preparation method comprises the following steps: mixing carbon black, an anti-ultraviolet agent, an antioxidant and a filler, uniformly stirring, adding a herbicide loading system and a compound high-dispersity emulsifier, and uniformly stirring to obtain a mixture; and carrying out mechanical pulverization and airflow pulverization on the mixture, drying, screening and packaging to obtain the herbicide composition. The herbicide composition has the effect of improving the stability of the herbicide composition, the decomposition rate of the herbicide can be effectively reduced, and the weeding effect of the herbicide composition is improved.

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

The invention relates to a one-dosage type copper-molybdenum display etching solution and a preparation method and application thereof. The etching liquid comprises the following components in parts by weight: 5-15 parts of hydrogen peroxide; 10 to 15 parts of organic acid; 8-12 parts of an organic base; 0.008 to 0.07 part of a chelating agent; 0.002 to 0.07 part of a corrosion inhibitor; 0.04 to 0.3 part of a surfactant; 0.1 to 0.6 part of a hydrogen peroxide stabilizer; and 65-73 parts of ultrapure water. The chelating agent and the corrosion inhibitor in the etching solution are jointly adsorbed on the metal surface, the corrosion inhibitor and the chelating agent can form intermolecular hydrogen bonds to obtain a product with larger molecular volume, the product is adsorbed on the metal surface to generate a protective isolation layer, and meanwhile, the contained delocalized large pi bonds and nitrogen atoms can provide electron pairs for empty orbits of metal, so that the metal surface is protected. And coordination bonds are formed to be adsorbed on the metal surface to form a compact adsorption film, so that the corrosion of the metal is effectively inhibited, and the taper angle and the etching morphology of the etched metal are stabilized.

The invention relates to the technical field of semiconductors, and discloses a method for stripping a substrate wafer, which comprises the following steps of: forming a first metal layer on the surface of a gallium nitride layer opposite to the substrate wafer, and forming a second metal layer on the surface of a support wafer; correspondingly contacting and bonding the first metal layer and the second metal layer together to form a bonded wafer; performing a first heating process; a laser scanning process is carried out on the surface of one side of the substrate wafer of the bonded wafer along a laser scanning path from the edge to the center by adopting a laser, so that the substrate wafer is separated from the gallium nitride layer; the temperature of the bonded wafer is gradually reduced from the edge to the center in the process; a laser scanning path on the surface of the substrate wafer is a spiral line from the edge to the center; and along a laser scanning path, from the edge to the center, the laser energy density, the laser scanning linear speed and the decomposition rate of the gallium nitride layer are gradually reduced, and the distances between adjacent light spots are the same. According to the invention, the yield of the gallium nitride layer after the laser lift-off process can be improved, and the fracture risk of the substrate wafer is reduced.

The invention relates to the technical field of beta-arbutin extraction, and discloses a method for extracting beta-arbutin from beta-arbutin fermentation liquor. The method comprises the steps of separating and removing mycoprotein, passing through an ultrafiltration membrane, passing through a nanofiltration membrane, passing through a reverse osmosis membrane, decolorizing, concentrating and crystallizing. The method can effectively improve the impurity removal efficiency of the fermentation liquor, shorten the process time, improve the product content and the product yield, reduce the energy consumption, reduce the cost, and reduce the discharge and treatment difficulty of wastewater. In addition, membrane concentration process conditions are mild, the product decomposition rate is low, and the extraction income is greatly improved.

The invention relates to the technical field of lithium batteries, and provides a lithium ion secondary battery. In the lithium ion secondary battery, a negative plate comprises a silicon carbon material; the silicon-carbon material comprises a porous carbon substrate and a silicon material distributed in pores of the porous carbon substrate; the open pore volume of the silicon carbon material is recorded as V cm < 3 > / g; the electrolyte comprises a first additive and a second additive, the first additive comprises ethyl 2, 2-difluoroacetate and / or a derivative thereof, and the second additive comprises 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether and / or a derivative thereof; the mass ratios of the first additive and the second additive are respectively recorded as A1% and A2%; a1 and A2 satisfy 5 < = A1 + A2 < = 30; and V is more than or equal to 0.0001 and less than or equal to 0.1, so that the low-temperature performance of the battery can be effectively improved, the high-temperature performance of the battery is considered, and the cycle performance of the battery is improved.

Belonging to the technical field of flame retardant materials, the invention discloses a fireproof flame retardant polymer composite material, which comprises the following components by weight: 20-60 parts of polyamide, 10-50 parts of polyurethane, 2-10 parts of a synergistic flame retardant, 1-5 parts of a lubricant, 1-2 parts of an antioxidant, and 1-5 parts of an anti-aging agent. The binaphthol phosphate provided by the invention contains a phosphorus-containing seven-membered macroring, and a triazinyl group and a carbazolyl group which are contained on 9, 9 '-(6-chloro-1, 3, 5-triazine-2, 4-diyl) bis (9H-carbazole), and a plurality of large steric hindrance groups with non-coplanar structures are introduced into a synergistic flame retardant through the reaction of the triazinyl group and the carbazolyl group; the thermal stability and the flame retardant property of the composite material are improved through heterocyclic groups on the heterocyclic diamine monomer, and the synergistic flame retardant effect of nitrogen and phosphorus elements is fully exerted; the composite material has good char forming capability and molten drop resistance; the synergistic flame retardant and the matrix have excellent compatibility, the problem that the mechanical property is reduced due to addition of a traditional flame retardant is effectively prevented, the structural rigidity of the material is improved through the synergistic flame retardant, and the overall mechanical strength of the composite material is enhanced.

The invention provides an injectable polyurethane microsphere as well as a preparation method and application thereof. Wherein the polyurethane is a polymerization product of polylactic acid polyol and bio-based isocyanate. The injectable polyurethane microsphere is smooth in surface, relatively small and uniform in particle size, good in dispersity, easy to inject, easy to disperse and relatively small in adverse reaction when being used as a facial filling agent.

The invention discloses a ceramic bearing device for thin glass processing and a ceramic supporting strip preparation method, the ceramic bearing device for thin glass processing comprises a plurality of ceramic supporting strips and a supporting frame, the ceramic supporting strips are vertically arranged, and the plurality of ceramic supporting strips are arranged in parallel; the ceramic supporting strip comprises a continuous ceramic line, and the diameter of the ceramic line is 1-2 mm. The ceramic line is provided with a plurality of first arc-shaped ceramic line segments, every two adjacent first arc-shaped ceramic line segments are connected through a connecting part, and each connecting part comprises a horizontal ceramic line segment or a second arc-shaped ceramic line segment. The first arc-shaped ceramic line segment is of an arc-shaped structure; the arc-shaped ceramic line segment is of an arc-shaped structure; the ceramic support strip is prepared by integral forming; the prepared ultra-thin glass bearing device is resistant to acid and alkali corrosion and stable at high temperature, and the supporting strips used for bearing ultra-thin glass are integrally formed and long in service life.

The present invention provides a disinfectant production device. The disinfectant production device includes a treatment tank; an aeration mechanism; a storage mechanism, the side wall of the fixed rod is inclinedly provided with an annular slide groove, and the interior of the slide groove is slidably connected to the spherical protrusion at one end; an electrolysis mechanism; a boosting mechanism, the compression plug is installed at the top of the limit rod, the side wall of the compression plug is provided with the first through hole, and the compression plug is slidably connected to the air outlet pipe; a discharging mechanism; the side wall of the slide rod and the interior of the cylinder are slidably connected to the first piston, the two ends of the spring are respectively fixedly connected to the first piston and the cylinder, and the spring is sleeved on the side wall of the slide rod; a cooling mechanism; a mixing mechanism; a one-way valve. The disinfectant production device provided by the present invention has the advantages of increasing the concentration of sodium hypochlorite solution, slowing down the decomposition rate of sodium hypochlorite, and quickly adding disinfectant to the sewage pool.

This invention relates to a nano-suspension containing thiazolium zinc and kasugamycin, wherein the mass ratio of thiazolium zinc to kasugamycin in the suspension is 7:1, and the particle size D90 of the suspension is 0.40 μm to 0.80 μm. The nano-suspension is prepared by thoroughly mixing thiazolium zinc technical, kasugamycin technical, necessary suspending agents, and water, followed by sand milling. In the suspension containing thiazolium zinc and kasugamycin prepared by this invention, the decomposition rate of kasugamycin is lower, and it is suitable for maintaining a low decomposition rate for extended periods in harsh environments.

This invention discloses a working solution for synthesizing hydrogen peroxide via the anthraquinone method, comprising a solvent and a working carrier. The solvent comprises aromatic hydrocarbons, diisobutylmethanol, and terephthalamide derivative A. Terephthalamide derivative A, by volume, has C9~C64... 10 The aromatic hydrocarbon comprises 30-95 parts, preferably 60-80 parts; the diisobutylmethanol comprises 2-20 parts, preferably 5-15 parts; and the terephthalamide derivative A comprises 5-30 parts, preferably 5-15 parts; the aromatic hydrocarbon is generally C9-C6. 10 Aromatic hydrocarbons; the working carrier is one or more of anthraquinone and its derivatives. This working solution exhibits excellent solubility and mass transfer capabilities for hydrogen, anthraquinone, and hydroanthraquinone, with a hydrogenation efficiency exceeding 13 g / L. It has low miscibility with water, good extraction and separation effects, and stable physicochemical properties. It can improve the production efficiency of the anthraquinone process for producing hydrogen peroxide and has promising prospects for industrial application.

The utility model relates to the technical field of sewage treatment, and discloses an ozone generating device for sewage treatment, which comprises a first storage box, an ozone generator and a mounting plate, the ozone generator is arranged in the first storage box, the lower part of the ozone generator is arranged above the mounting plate, and the mounting plate is arranged in the first storage box. The lower portion of the mounting plate is mounted above an oscillator, a cooling device is arranged on the right side of an ozone generator and mounted on the inner side of a first storage box, a telescopic pipe is mounted on the left side of the ozone generator, and a first connecting pipe is mounted on the left side of the telescopic pipe; the left side of the first connecting pipe is installed in a threaded groove, the threaded groove is installed in a first storage box, a second connecting pipe is installed in the first connecting pipe, and a pipe body is installed on the left side of the second connecting pipe. According to the utility model, the decomposition rate of ozone is reduced, and the water purification effect is ensured.

The invention provides a lumen tissue anastomat which comprises an anastomosis ring and an anastomosis structure arranged on the anastomosis ring and used for fixing lumen tissue, and the anastomosis structure comprises an anastomosis nail. The anastomosis ring is made of a first material, and the anastomosis nail is made of a second material. In a human body environment, the first material can be decomposed to form a first substance, and the first substance reacts with the second material to degrade the second material. According to the mode, the anastomosis ring made of the first material can be decomposed in a human body environment, and the decomposed product can react with the anastomosis nail made of the second material, so that the anastomosis nail can be degraded more quickly; and meanwhile, the first material has a relatively low decomposition rate in the human body, so that the situation that the first material is decomposed too quickly before the lumen tissue is healed can be avoided.

The invention discloses a dispersible oil suspending agent containing rimsulfuron and quizalofop-p-ethyl and a preparation method of the dispersible oil suspending agent, and belongs to the field of pesticide preparations. The dispersible oil suspending agent containing rimsulfuron and quizalofop-p-ethyl provided by the invention is prepared from the following components in percentage by mass: 0-5% of rimsulfuron, 5-10% of quizalofop-p-ethyl, 1-5% of a dispersing agent, 10-20% of an emulsifier, 1-5% of a thickening agent, 1-5% of a stabilizer and the balance of medium oil, wherein the content of rimsulfuron is not zero; the stabilizer is sodium benzoate and / or tannic acid. The dispersible oil suspending agent disclosed by the invention is good in physical state after being subjected to 7-day cold storage at 0 DEG C and 14-day hot storage at 54 DEG C, is free from thixotropy or curing, and is good in long-term storage stability at normal temperature; the decomposition rates of rimsulfuron and quizalofop-p-ethyl are relatively low.

The invention relates to the technical field of herbicides, and particularly discloses a preparation method of a mesosulfuron-containing herbicide dispersible oil suspending agent, the mesosulfuron-containing herbicide dispersible oil suspending agent is obtained by adding additives such as effective components mesosulfuron and mefenpyr-diethyl into a methyl oleate solvent, and the suspending agent is good in stability, low in toxicity, low in cost and suitable for industrial production. After heat storage or long-term storage at normal temperature, the decomposition rate of effective components is low, the physical and chemical properties are stable in the shelf life of the mesosulfuron-methyl herbicide, and reliable technical support is provided for further popularization of the mesosulfuron-methyl herbicide.

The invention discloses a short-term magnesium alloy contraceptive ring and a preparation method, and belongs to the technical field of medical alloy materials, the short-term magnesium alloy contraceptive ring comprises the following elements by mass: 30-48% of Zn; 0.5 to 3.0% of Ca; the balance is Mg; and the raw materials are sequentially subjected to smelting, casting, secondary extrusion and 3D printing, and the short-term magnesium alloy contraceptive ring is prepared. The contraceptive ring obtained according to the preparation method is suitable for 3D thixoforming printing under the condition that other reinforcing auxiliary components do not need to be additionally added, the size of the contraceptive ring is controllable, the contraceptive ring is matched with the womb of a female individual, and the problems of discomfort, pain or displacement and the like caused by size mismatching are avoided.

The invention relates to the technical field of cement production admixtures, in particular to a desulfurizer for a cement kiln line, a preparation method and application thereof, which adopts polyacrylamide, sodium humate, methyldiethanolamine, triethanolamine, triethylenetetramine, sodium bicarbonate and sodium hexametaphosphate as effective ingredients, which are directly added in a secondary suspension preheater of a dry cement kiln to fix sulfur in cement clinker, and has the characteristics of high desulfurization efficiency, small fluctuation of flue gas, mature on-site process, low investment, no wastewater discharge and the like.

The application relates to a powder containing n-butyl thiophosphoric triamide and application thereof. The powder containing n-butyl thiophosphoric triamide provided by the application can effectively reduce the decomposition rate of n-butyl thiophosphoric triamide after being added into a fertilizer, effectively prolong the action time of n-butyl thiophosphoric triamide, and improve the urease inhibition effect.

The invention provides a compound taking a nitrogen-containing heterocyclic ring as a parent nucleus, a preparation method of the compound, a conjugate and a medicine, and belongs to the technical field of gene engineering. The compound taking the nitrogen-containing heterocyclic ring as the parent nucleus provided by the invention contains a 1, 4, 7, 10-tetraazacyclododecane structure, so that the stability of the whole compound in a living body can be improved, the compound containing a cell-targeting ligand is not easy to degrade in the living body, and further, the effect of improving the stability of the compound and biomolecules (such as a cell-targeting ligand) is facilitated. The stability of the conjugate formed by connecting the nucleic acid molecules in an organism can be improved, the stability of the biomolecules can also be improved, and the decomposition rate of the biomolecules can be reduced; when the conjugate is used for cell targeted delivery, the effectiveness of a delivery system can be improved, the delivery effect is improved, and the effect of biomolecules is further improved.

The present invention discloses a method for preparing an implant material, which is characterized in that it comprises the following steps: preparing a matrix slurry, preparing the matrix slurry into a matrix blank; drying the matrix blank, and pre-sintering the matrix blank after drying to obtain a primary matrix; preparing a first film blank on the surface of the primary matrix, and then final sintering the primary matrix blank to obtain the implant material; the implant matrix inside the implant material finally obtained is firmly combined with the film layer on the surface, and the implant is not prone to falling off or damage during use, and the implant has high biological activity.

The invention relates to the technical field of pesticide microemulsions, in particular to a saflufenacil-containing microemulsion as well as a preparation method and application thereof. The invention relates to a micro-emulsion containing saflufenacil, which is prepared from the following raw materials in percentage by mass: 1 to 5 percent of saflufenacil, 5 to 30 percent of refined glufosinate-ammonium, 2 to 16 percent of solvent, 18 to 32 percent of emulsifier, 0 to 10 percent of cosolvent and the balance of water. The cold storage stability of the microemulsion can be improved by limiting the octyl decyl alcohol polyether phosphate and the tristyrylphenol polyoxyethylene ether ammonium sulfate as the emulsifier. The stability of the microemulsion at low temperature can be improved by limiting the type of the emulsifier and the type of the cosolvent, and the clear and transparent microemulsion is obtained.

The invention discloses a preparation method of a medical PTFE etched tube, and relates to the technical field of medical apparatus and instrument manufacturing. The method comprises the following steps: firstly, drying a pipe through an ultrasonic cleaning and drying machine; then plasma surface activation treatment is carried out to enhance the surface performance, and then etching is carried out under the assistance of a rotary conveying device to ensure uniformity; and finally, through multi-stage pure water rinsing and clean hot air drying, it is ensured that the surface of the pipe is clean and free of impurities. According to the method, the interface property of the material is improved, the surface tension is reduced, and the corrosion resistance and oxidation resistance of the material are improved.

The application discloses a coupling method and system for cumene refining and low-temperature concentration of cumene hydroperoxide, wherein the coupling method for cumene refining and low-temperature concentration of cumene hydroperoxide comprises the steps of refining cumene and low-temperature concentrating cumene hydroperoxide, and heat coupling is performed between the refining process of cumene and the refining process of cumene hydroperoxide by controlling the temperature and pressure of cumene refining and the temperature and pressure of cumene hydroperoxide concentration. The application realizes zero energy consumption in the concentration process, effectively establishes a low-temperature double-effect process, and simultaneously achieves the purposes of reducing product decomposition and energy consumption.

The invention relates to the technical field of chlorpyrifos missible oil preparations, and particularly discloses a preparation method of an efficient and environment-friendly chlorpyrifos missible oil preparation. Comprising the following operation steps: S1, uniformly mixing a chlorpyrifos active compound, an ester compound and an alcohol ether organic solvent, and heating and stirring to obtain a mixed solution A; s2, adding a mixed emulsifier into the mixed solution A, and continuously and uniformly stirring to obtain a mixed solution B; and S3, adding an epoxy compound into the mixed solution B, and continuously and uniformly stirring to obtain the efficient environment-friendly chlorpyrifos missible oil preparation.

The invention provides a sterilization and disinfection liquid composition which comprises sodium silicate, sodium benzoate, sodium acetate, sodium persulfate, sodium chloride and sodium metaphosphate, the composition is simple in raw material composition and low in cost, and the obtained composition is extremely high in stability, not easy to decompose, easy to store and transport and extremely high in economic value.