1923 results about "Acetone" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The invention relates to the technical field of high polymer material chemistry, and discloses a high and low temperature resistant anti-yellowing optical adhesive and a preparation process thereof, the high and low temperature resistant anti-yellowing optical adhesive comprises the following components by weight: 40-60% of modified organic silicon resin, 20-30% of urethane acrylate, 10-15% of alicyclic epoxy resin, 0.5-5% of a nano inorganic filler, 0.8-2.5% of an anti-yellowing composite reagent, and the balance of a solvent. The coating is prepared from the following components in percentage by weight: 0.5 to 1.5 percent of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 0.1 to 0.3 percent of fluorine modified polyacrylate flatting agent and 0.3 to 1.0 percent of chloroplatinic acid-divinyl tetramethyl disiloxane complex catalyst. The preparation method comprises the following steps: mixing alpha, omega-dihydroxy polydimethylsiloxane and phenyltrimethoxysilane according to a mass ratio of 8: 2-7: 3, adding 0.3-1.0% of a chloroplatinic acid-divinyl tetramethyl disiloxane complex catalyst, and raising the temperature by stages under the protection of nitrogen, so that the glass transition temperature of the adhesive can reach 120 DEG C below zero and 125 DEG C, and the temperature of the adhesive can reach 120 DEG C below zero and 125 DEG C below zero. And the long-term service requirement of the optical device in an extreme temperature environment is met.

The invention discloses a wear-resistant vehicle body film and a preparation method thereof, and relates to the technical field of films. The wear-resistant automobile body film prepared by the invention is prepared from polytetrahydrofuran ether glycol, isophorone diisocyanate, a catalyst, dihydric alcohol quaternary ammonium salt, a functional aid, modified silicon dioxide and a chain extender. The dihydric alcohol quaternary ammonium salt is obtained by reacting N, N '-dihexyl-N, N'-dimethyl propane-1, 3-diamine with monochloroacetone and then condensing with glycerol; the functional additive is obtained by reacting 2-boric acid thiophene-4-methyl acetate with 2, 7-dibromofluorene and then carrying out bromination hydrolysis; the modified silicon dioxide is obtained by reacting pretreated silicon dioxide with melamine and then reacting with sodium hypophosphite. The wear-resistant vehicle body film prepared by the invention has good anti-aging, wear-resistant, antibacterial and flame-retardant properties.

The invention discloses a hydrogel wound dressing with a synergistic healing promoting function as well as a preparation method and application thereof. The preparation method comprises the following steps: 1, dissolving oxidized methacrylated hyaluronic acid and dopamine in deionized water to obtain a solution A; the preparation method comprises the following steps: dissolving N-isopropylacrylamide, a photoinitiator 2-hydroxy-2-methyl-1-(4-(2-hydroxyethoxy) phenyl)-1-acetone and a cross-linking agent N, N '-methylene bisacrylamide in deionized water to obtain a solution B; 2, mixing the solution A and the solution B to obtain a pre-gel solution; or dissolving polyphenylboronic acid ester nanoparticles or polyphenylboronic acid ester-kaempferol with deionized water to obtain a solution C, and mixing the solution C with the solution A and the solution B to obtain a pre-gel solution; and 3, injecting the pre-gel liquid into a mold, and illuminating to obtain the hydrogel wound dressing loaded with the nanoparticles. The hydrogel disclosed by the invention can be used for effectively solving various problems in a wound healing process and promoting rapid and high-quality healing of a wound.

The invention discloses a crown ether functionalized covalent organic framework material as well as a preparation method and application thereof, and the method comprises the following steps: adding a covalent organic framework material, 4-bromobenzo-15-crown-5, potassium carbonate and potassium iodide into an acetone solution for reaction, washing the obtained crude product, performing Soxhlet extraction with tetrahydrofuran for a certain time, and drying to obtain the crown ether functionalized covalent organic framework material. The crown ether functionalized covalent organic framework material is obtained. Compared with a synthesis method of crown ether functionalized COFs in the prior art, the method has the advantages that the crown ether (4-bromobenzo-15-crown-5) can be grafted to the COFs in one step, the Na < + > adsorption capacity and the adsorbent recycling performance are greatly improved, the synthesis method is simple, and synthesis of the crown ether functionalized COFs is greener, more convenient and more economical.

The invention relates to the technical field of waterproof materials, and particularly discloses a high-elasticity waterproof emulsion and a preparation method thereof. The invention discloses a high-elasticity waterproof emulsion. The water-based paint is prepared from the following raw materials in parts by mass: 40 to 60 parts of modified acrylic resin emulsion, 25 to 40 parts of waterborne polyurethane, 3 to 6 parts of hydroxyethyl methylacrylate, 0.5 to 1 part of mercaptopropionic acid, 6 to 8 parts of fluorinated mica sheet, 3 to 6 parts of organic silicon emulsion, 2 to 4 parts of fluorocarbon surfactant, 0.8 to 1.5 parts of adipic dihydrazide, 0.3 to 0.8 part of dynamic cross-linking agent, 3 to 8 parts of compatilizer, 0.5 to 1 part of antioxidant, 0.5 to 1 part of anti-aging agent, 0.5 to 1.5 parts of defoaming agent and 40 to 55 parts of solvent. The modified acrylic resin emulsion is prepared from a monomer comprising diacetone acrylamide. The high-elasticity waterproof emulsion prepared by the invention has relatively good elasticity, waterproof performance and aging resistance.

The invention relates to an electrolytic copper foil anode plate electrode and a preparation process thereof, and belongs to the technical field of electrolytic copper foil production. The electrolytic copper foil anode plate electrode sequentially comprises a titanium substrate, an Ir-Ta oxide transition layer and an IrO2-RuO2-SnO2 oxide composite coating from inside to outside. The preparation process comprises the following steps: firstly, forming a micron-sized rough surface by utilizing acetone and ethanol ultrasonic cleaning and oxalic acid etching; the transition layer is subjected to sol dispersion and sintering treatment through polyethylene glycol, so that the balance of low porosity and high bonding strength is realized; the composite coating adopts an acetylacetone-ethylene glycol monomethyl ether solvent system, and a nanocrystalline structure is formed through step-by-step sintering; and an Ir-rich passivation layer is generated through electrochemical activation, and the finally obtained anode plate electrode has more excellent electrochemical activity and longer service life.

The invention relates to the technical field of sewage treatment, in particular to an electrostatic spinning PVDF nanofiber membrane for sewage treatment and a preparation method and application of the electrostatic spinning PVDF nanofiber membrane. The preparation method comprises the following steps: dissolving PVDF (Polyvinylidene Fluoride) particles in a mixed solvent of DMF (Dimethyl Formamide) and acetone, adding nano TiO2 particles subjected to APTES (Aminopropyltriethoxysilane) surface modification, and adding PVP (Polyvinyl Pyrrolidone) into the solution to obtain a uniform spinning solution; spinning by adopting electrostatic spinning equipment to obtain a PVDF / TiO2 / PVP nanofiber membrane; the nanofiber membrane is soaked in a sodium hydroxide solution, then the membrane is soaked in a Tris-HCl buffer solution containing dopamine, and the final electrostatic spinning PVDF nanofiber membrane is obtained. The average diameter of nanofibers of the nanofiber membrane is 200-300nm, the porosity of the membrane is 70-80%, and the water contact angle is less than 60 degrees; when the nanofiber membrane is used for treating sewage containing organic pollutants and heavy metal ions, the removal rate of the nanofiber membrane on methyl orange can reach 95% or above; the rejection rate of copper ions can reach 90% or above; the removal efficiency of organic pollutants and heavy metal ions is obviously improved.

The application discloses a preparation method of carbon aerogel material for light electromagnetic shielding, and comprises the following steps: adding resorcinol, phloroglucinol, a template agent and formaldehyde into pure water, stirring and dissolving to obtain a precursor solution; adding the precursor solution into white oil containing a surfactant, emulsifying, heating in an oil bath and fully reacting; centrifugal separation to obtain powder, high-temperature carbonization, dispersion in oleylamine, addition into a stock solution containing nickel acetylacetonate, triphenylphosphine and oleylamine, high-temperature reaction and cooling, addition of a mixture of hexane and ethanol to obtain a product; centrifugal separation and washing to obtain light high-electromagnetic-shielding carbon aerogel. The carbon aerogel material for light electromagnetic shielding prepared by the method has the advantages of small density, high efficiency, corrosion resistance, high electromagnetic shielding efficiency, high product yield and the like, and by controlling the nucleation and growth rate of Ni2P, the Ni2P nanoparticles can be uniformly grown on the carbon aerogel microspheres, and the method is suitable for application in large-scale industrial production.

The invention discloses a high-bonding-strength conductive adhesive and a preparation method and application thereof.The preparation method comprises the following steps that S1, epoxy resin E51 is placed in a three-neck flask, acetone is added, stirring is conducted till the epoxy resin E51 is completely dissolved, and ethidene diamine is slowly dropwise added; s2, under the protection of nitrogen, heating to 70-80 DEG C, adding a catalyst triphenylphosphine, carrying out a constant-temperature reaction, after the reaction is completed, cooling to 35-45 DEG C, adding deionized water, and stirring; s3, acetone and unreacted ethylenediamine are removed, then deionized water is used for washing, an obtained product is placed in a vacuum drying oven to be dried, and amino modified epoxy resin of faint yellow viscous liquid is obtained; s4, mixing the amino modified epoxy resin with an anhydride curing agent, a conductive filler, a diluent and a coupling agent; and S5, fully stirring the mixture, carrying out vacuum defoaming, and uniformly stirring to obtain the conductive adhesive. According to the invention, the shearing strength of the chip and the copper bracket can be improved to more than 30MPa.

The invention discloses a thickening agent, a salt-resistant and high-temperature-resistant fracturing fluid prepared by using the thickening agent as well as a preparation method and application of the salt-resistant and high-temperature-resistant fracturing fluid, and belongs to the technical field of oil and gas development. The problems that in the current oil and gas reservoir exploitation process, the flow-back fluid utilization rate is low, and a thickening agent and fracturing fluid prepared from the thickening agent are high in thickening cost, poor in efficiency, insufficient in temperature resistance and salt resistance and the like are solved. The amphoteric polyacrylamide copolymer is synthesized by using acrylamide, diacetone acrylamide and alkyl sulfobetaine, the copolymer is used as a thickening agent and can be used for preparing the fracturing fluid together with the fracturing flow-back fluid containing high salt, and the fracturing fluid which is high in consistency, resistant to high temperature and salt and high in viscosity can be obtained under the low concentration of the obtained fracturing fluid. And better rheological property and sand-carrying effect are achieved. In addition, an anti-swelling agent can be added into the fracturing fluid to prevent clay from swelling. Meanwhile, an auxiliary surfactant can be added into the fracturing fluid, so that the dissolving speed of the fracturing fluid is adjusted, and the surface tension is reduced.

The present invention relates to the technical field of antibiotic production, and in particular to a dalbavancin intermediate A40926 and a separation and purification method thereof, comprising the following steps: S1, filtering a fermentation broth containing the dalbavancin intermediate A40926 to obtain a collected liquid; S2, adsorbing the collected liquid through a macroporous adsorption resin, eluting with ethanol, and collecting an eluate a having an A40926 unit greater than 100 mg / L; S3, ultrafiltrating and concentrating the eluate a to obtain a concentrated liquid having an A40926 unit of 15,000 to 16,000 mg / L; S4, subjecting the concentrated liquid to a chromatography exchange resin, top-washing with pure water, and gradient eluting with an ammonium acetate-ethanol solution, to collect an eluate b having an A40926 purity greater than 95%; S5, adjusting the pH of the eluate b to 8.0±0.2, adding acetone, adjusting the feed liquid temperature to 2 to 8°C, stirring for 6 to 7 hours, performing crystallization, and filtering and drying to obtain the dalbavancin intermediate A40926.

The invention provides a sulfonated modified COF-based hydrogel based on a TPAD skeleton, and a preparation method and application thereof, and belongs to the field of water treatment. The preparation method comprises the following steps: S1, synthesizing a TPAD-NHBoc amino monomer by using reagents such as 1, 4, 5, 8-tetrachloroanthraquinone and the like; s2, sequentially adding a TPAD-NHBoc amino monomer, a Dha aldehyde monomer, dioxane and trifluoroacetic acid into a glass tube according to a certain proportion, carrying out ultrasonic treatment, stirring, putting into a reaction kettle, and reacting at 115-125 DEG C for 96-120 hours; s3, after the reaction is finished and cooling is performed, carefully taking out the blocky gel from the glass tube, respectively immersing the blocky gel into dioxane and DMF, and repeatedly replacing the solvent for washing; s4, washing the gel, soaking the washed gel in a DMF solution containing 1, 3-propane sultone, and carrying out a reaction at 75-85 DEG C for 16-20 h to obtain sulfonated modified gel; s5, the obtained sulfonated modified COF-based gel is soaked in DMF, acetone, methanol and water for multiple times of soaking and washing, and the hydrogel is obtained. The sulfonated modified hydrogel based on the TPAD skeleton has excellent solar photo-thermal water evaporation performance.

The invention relates to the technical field of purification of fine chemical intermediates, in particular to a purification method of a mannitol carbonate sulfate preparation process intermediate, which comprises the following steps: S1, synthesizing diacetone-D-mannitol; s2, preparing an organic solution containing solids; s3, performing deprotection reaction to prepare a solid crude product; s4, removing unreacted solids; s5, extracting and separating by-product solids; and S6, purifying the target product solid and recovering mannitol. Through system separation and multi-component recovery, preparation of a high-purity product and cyclic utilization of unreacted substances, byproducts and raw materials are realized, the yield is remarkably improved, the cost is reduced, and the quality of a final product is guaranteed.

The invention relates to the technical field of protective films, in particular to a high-light-transmittance label protective film and a preparation method thereof.A multi-layer protective film formed by compounding a release film layer, an adhesive layer, a PET film and a protective layer is constructed; composite vinyl ester resin constructed by taking epoxy resin and acrylic acid as raw materials is subjected to toughening modification, and then a linear reactive diluent is compounded to construct a high-toughness protective layer which is resistant to high temperature and aging and can be photo-cured; long-chain alkane modified nano silicon dioxide is introduced into the protective coating, nano silicon dioxide is aminated by 3-aminopropyltriethoxysilane, and then 17-carbon monoisocyanate prepared by taking acetone, stearic acid, triphenylphosphine, sodium azide and N-chlorosuccinimide as raw materials is grafted to form the long-chain alkane modified nano silicon dioxide. Vinyl butadiene styrene rubber, composite vinyl ester resin, tackifying resin, a softening agent and a photoinitiator are mixed to prepare the adhesive layer.

The invention provides a silica hydrogel, a method for removing the same, and a silica hydrogel film. A silica-based composite material modified by an alkyl amine group NH2L and an organic alkyl group R is prepared by adopting a reversed-phase microemulsion method, and a silica colloid material highly modified by an organic group is obtained by controlling the molar weight of alkyl amine silane and alkyl silane and controlling no use and no contact of any alcohol solvent in the whole preparation process. Adding acetone for demulsification, centrifugally collecting, washing solids, drying to obtain a solid silicon dioxide colloid material, and dissolving the solid silicon dioxide colloid material in deionized water to obtain the silicon dioxide hydrogel. The silica hydrogel has solubility in an alcohol solvent and can be removed by the alcohol solvent. The silicon dioxide hydrogel can be combined on the surface of a membrane material to obtain a silicon dioxide hydrogel membrane.

The present invention discloses a preparation method of a graphite-like carbon nitride-yttrium-stabilized zirconium oxide composite hydrogen barrier coating. First, a low-carbon steel substrate is pretreated to obtain a pretreated substrate; then zirconium n-propyl alcohol, n-propyl alcohol, acetylacetone and yttrium nitrate are mixed and reacted, aged to obtain a yttrium-stabilized zirconium oxide sol; the sol is coated on the pretreated substrate and dried, and the coating, drying and repeated treatments are followed by pre-sintering, followed by repeated coating, drying, and finally heat treatment to obtain a yttrium-stabilized zirconium oxide coating YSZ; melamine and thiourea are mixed, calcined and ground to obtain powdered graphite-like carbon nitride g-C3N4; finally, g-C3N4 powder and a coating coated with YSZ are sintered to obtain a graphite-like carbon nitride-yttrium-stabilized zirconium oxide g-C3N4 / YSZ composite coating. The hydrogen barrier coating prepared by the present invention can solve the problem that hydrogen embrittlement is prone to occur when current steel equipment is used in a hydrogen environment, and improve the safety of steel equipment during hydrogen energy utilization.

The invention relates to the technical field of diaphragms, in particular to an alkaline electrolyzed water porous diaphragm and a preparation method and application thereof.The preparation method comprises the following steps that engineering thermoplastic resin and a diluent are mixed in a nitrogen atmosphere in a sealed mode to obtain a mixed solution, and then the mixed solution is heated to obtain a membrane casting solution; the membrane casting solution is cast on a glass plate at the temperature of 200-350 DEG C, the casting thickness of the membrane casting solution on the glass plate is controlled to be 100-500 microns, then the glass plate where the membrane casting solution is cast is placed at the room temperature to be cooled and then placed in cooling water to be cooled again, so that the membrane casting solution is solidified on the glass plate to form a membrane, and the glass plate and the membrane are separated to obtain an alkaline electrolytic water liquid membrane; and immersing the alkaline electrolyzed water liquid membrane into heated acetone to extract the diluent, thereby obtaining the alkaline electrolyzed water porous diaphragm. The diaphragm prepared by the preparation method of the alkaline electrolyzed water porous diaphragm has relatively low ion impedance and relatively high mechanical strength and alkali resistance.

The invention relates to the technical field of energetic materials, in particular to a laser response type high-entropy alloy-based initiating explosive material and a preparation method thereof. The initiating explosive material is mainly formed by uniformly loading a heat-sensitive high-energy compound (such as lead stilbeneate or hexa (4-amino-3, 5-dinitropyrazole) copper) on high-entropy alloy nanoparticles containing five or more metal elements, wherein the heat-sensitive high-energy compound is such as lead stilbeneate or hexa (4-amino-3, 5-dinitropyrazole) copper. The preparation method comprises the following steps: mixing acetylacetone metal salt, a surfactant and a reducing agent in an organic solvent, and stirring and reacting at 180-220 DEG C to prepare high-entropy alloy nanoparticles; the nano particles and a high-energy compound are co-dispersed in a mixed solvent containing a dispersing agent, ultrasonic treatment is carried out to form suspension liquid, and freeze drying is carried out to obtain the nano particles. The method is characterized in that the excellent photo-thermal conversion performance of the high-entropy alloy is utilized, under low laser energy irradiation, a high-energy compound can be effectively excited, and stable detonation of secondary charge CL-20 is successfully achieved. According to the invention, the problems of high response threshold and low output energy of the existing laser initiating explosive material are solved.

The invention relates to the technical field of composite materials, in particular to a large-length-diameter-ratio composite pipe fitting forming method which comprises the steps of S1, core mold splicing, S2, air pipe sleeving, S3, paving and winding, S4, core mold dissolving, S5, sealing and depoling, S6, flange mounting, S7, mold closing and bag making and S8, heating and curing. Wrapping the hot melt adhesive at the bonding position by using an aluminum foil adhesive tape, then removing the aluminum foil adhesive tape, sleeving the bonded core mold by using a release air pipe longer than the core mold, pouring acetone into the release air pipe, dissolving the EPS foam rod, completely sealing the inlet end of the release air pipe, and finally sealing the release air pipe. And the sealed release air pipe is pulled out of the pipe fitting prefabricated body, the pipe fitting prefabricated body is obtained, and then the composite pipe fitting is manufactured in cooperation with a female die and a bag. The technical problem that the large-length-diameter-ratio composite pipe fitting with the perfect inner surface effect and the perfect outer surface effect cannot be manufactured through an existing technology on the premise that the mechanical property of a product is guaranteed is solved.

The disclosure relates to compositions comprising a phentermine and a unicyclic aminoketone and methods of use thereof. The methods of use include inducing weight loss or reducing weight gain in a human subject. The unicyclic aminoketone may be diethylpropion or bupropion. In some embodiments, the compositions further include tadalafil or naltrexone.

The invention relates to the field of printing inks and discloses a wear-resistant and scratch-resistant printing ink, a preparation method thereof, and an application thereof. The printing ink comprises: a modified aqueous polyurethane emulsion, a modified mica sheet, a pigment, an additive, and deionized water; the modified aqueous polyurethane emulsion is prepared by introducing a double-terminal hydroxyl chain extender into a polymer; the double-terminal hydroxyl chain extender is reacted with a Schiff base intermediate obtained by reacting salicylaldehyde and p-aminobenzyl alcohol and isocyanoethyl methacrylate, and the obtained double-bonded Schiff base intermediate is reacted with 1,1,3,3-tetramethyldisiloxane to prepare the ink; the modified mica sheet is reacted with triethylenetetramine, formaldehyde, and acetone, and then formaldehyde is added under alkaline conditions for polycondensation, the obtained cationic polymer and glutaraldehyde are prepared into the cationic mica sheet, and finally polyaniline is grown on the surface of the mica sheet through interfacial polymerization. The ink prepared by the invention has good adhesion, high hardness, and excellent water resistance, wear resistance, heat resistance, antistatic properties, and antibacterial properties.

The invention discloses an optical paste film and a preparation method thereof, and relates to the technical field of optical functional materials. The optical slurry film is prepared by taking a polyethylene glycol terephthalate film as a base material and coating an optical slurry coating, the optical slurry coating is prepared from the following raw materials in parts by weight: 12 to 16 parts of nano silicon dioxide, 22 to 28 parts of acetone and butanone mixed solvent, 7 to 9 parts of modified titanium dioxide, 4 to 6 parts of nano zirconium oxide, 30 to 35 parts of modified epoxy resin, 18 to 22 parts of butyl acrylate, 4 to 6 parts of dioctyl sebacate, 2.5 to 3.5 parts of silane coupling agent KH-570, 1 to 1.5 parts of organic silicon flatting agent and 0.6 to 1 part of organic silicon defoaming agent. 1.2-1.8 parts of an antioxidant 1010, 3-4 parts of a photoinitiator 184 and 6-8 parts of bis (4-tert-butylphenyl) iodine hexafluorophosphate; the polyethylene glycol terephthalate film pretreatment material comprises absolute ethyl alcohol and deionized water. The raw materials are scientifically proportioned, the titanium dioxide and the epoxy resin are clearly modified, the preparation process is complete, and the finished product is high in light transmittance, good in weather resistance, adaptive to the requirements of the optical field and high in practicability.

The invention discloses a method for preparing phenol by utilizing a biomass raw material, which comprises the following steps: 1) crushing biomass, adding the crushed biomass into a caustic alkali solution to carry out hemicellulose removal treatment, and carrying out solid-liquid separation to take a solid substance, so as to obtain hemicellulose-removed biomass; 2) adding the hemicellulose-removed biomass into an ethylene glycol-ferric chloride eutectic solvent for lignin extraction, then adding an acetone-water mixed solution, then carrying out solid-liquid separation, taking a liquid substance, adding water to precipitate the lignin, then carrying out solid-liquid separation, and taking a solid substance to obtain the lignin; and 3) pyrolyzing the lignin in a protective atmosphere to obtain lignin oil containing phenol. The method for preparing phenol from biomass raw materials has the advantages of simple operation, high phenol yield, high product purity, low energy consumption, safety, environmental protection and the like, and is suitable for large-scale industrial application.

The invention belongs to the technical field of rhenium alloy materials, and particularly relates to a high-strength rhenium alloy material and a preparation method thereof. The rhenium alloy material is prepared from the following raw materials in percentage by mass: 12 to 24 weight percent of molybdenum, 6 to 9 weight percent of niobium, 2 to 5 weight percent of cobalt, 1 to 3 weight percent of tungsten, 0.5 to 1.2 weight percent of modified tantalum carbide, 3 to 6 weight percent of high-entropy rare earth and the balance of rhenium and other inevitable impurities. The modified tantalum carbide is prepared by the following preparation process: adding tantalum chloride, zirconium oxychloride and phenolic resin into a mixed solution of acetylacetone and n-butyl alcohol, stirring for 1-2 hours under a heating condition, dropwise adding ammonia water, continuously stirring for 0.5-1 hour, and drying to obtain a precursor; calcining the precursor, and cooling to obtain the modified tantalum carbide. The rhenium alloy prepared through the method has high hardness, good bending strength and excellent high-temperature mechanical property.

The invention belongs to the technical field of preparation of organic chemicals, and particularly relates to trifluoropyruvic acid and a method for preparing trifluoropyruvic acid from trifluoroacetone. The method comprises the following steps: dissolving trifluoroacetone in a chlorinated solvent, adding a catalyst, introducing chlorine, carrying out a closed reaction, controlling the reaction temperature, cooling to room temperature after the reaction is finished to obtain a 1, 1, 1-trichlorotrifluoroacetone reaction mixture, adding an alkali liquor to carry out a hydrolysis reaction, separating out a water phase after the reaction is finished, and drying to obtain the trifluoropyruvic acid. And continuously applying the chlorination solvent, continuously adding the acid into the water phase to adjust the pH value to 3-4 to obtain a trifluoropyruvic acid water solution, finally extracting and pulping to obtain a wet trifluoropyruvic acid product, and purging with air to obtain a pure trifluoropyruvic acid product. According to the method for preparing trifluoropyruvic acid from trifluoroacetone, the raw materials are easy to obtain, the process is stable, the yield is high, the cost is low, and the invention further provides a trifluoropyruvic acid product.

The invention provides a preparation method of an insecticide synergistic responsive release delivery system, and belongs to the technical field of insecticides. Chlorantraniliprole insecticide is dissolved in an acetone solvent containing Tween 80 to form a drug-carrier complex; then polymerizing the N-isopropylacrylamide temperature-sensitive monomer under the action of an ammonium persulfate and tetramethylethylenediamine initiation system to form a temperature-responsive hydrogel matrix; four key parameters including the optimal molar ratio, the optimal embedding temperature, the optimal embedding time and the optimal phase change temperature control precision of an amido hydrophilic group and an isopropyl hydrophobic group are calculated by applying a double-layer game model, and a drug-carrier complex is embedded into a hydrogel matrix through a physical embedding effect to construct a three-layer nested delivery structure; the technical problem that the pesticide effect utilization rate is low due to the fact that the pesticide lacks an accurate temperature-responsive release control mechanism in environmental application is solved.

The invention provides a high slump loss resistant aliphatic water reducer with a branched structure and a controllable polymerization preparation method of the high slump loss resistant aliphatic water reducer. The water reducing agent is prepared from the following components in parts by weight: 14 to 24 parts of acetone, 19 to 29 parts of formaldehyde, 7.5 to 11.5 parts of sodium hydrogen sulfite, 3.5 to 6.5 parts of four-arm star-shaped low-carbon hydrophobic core, 2.5 to 5.5 parts of amide-ester bifunctional slow-release monomer, 2.0 to 4.5 parts of zwitter-ion-phosphonic acid based clay inhibitor and 60 to 90 parts of deionized water. The obtained water reducing agent has good initial dispersibility, stable adsorbability, excellent slump loss resistance and relatively strong clay interference resistance.

The application relates to a device for water-solid contact electrocatalytic degradation of trace antibiotics by using a high-charge-density nanofiber membrane, which comprises the following steps: S1, preparing Ti3C2T x MXene nanosheets; S2, preparing Ti3C2T x MXene / DMF spinning solution; S3, preparing high-electronegativity polymer spinning solution, dissolving high-electronegativity polymer powder in DMF and acetone, performing magnetic stirring by using a PTFE stirring rod magnet to perform mixing, and obtaining high-electronegativity polymer spinning solution; S4, mixing Ti3C2T x MXene / DMF spinning solution and the high-electronegativity polymer spinning solution, and then performing spinning, so that a high-charge-density nanofiber membrane is obtained; and S5, assembling the prepared high-charge-density nanofiber membrane into an ultrasonic filtration unit, and then making wastewater containing trace antibiotics and suspended particles enter the ultrasonic wave chamber from a water inlet pipe.

The invention relates to the technical field of electroplating, in particular to a nickel stripping agent, a preparation method of the nickel stripping agent and a nickel plating layer stripping method. The nickel stripping agent comprises the following raw materials: an oxidizing agent, a complexing agent, a dissolution promoter, a surfactant and a corrosion inhibitor, wherein the mass ratio of the oxidizing agent to the complexing agent to the dissolution promoter to the surfactant to the corrosion inhibitor is (4-15): (3-25): (1-11): (0.01-1): (0.01-5); wherein the oxidizing agent is nitrobenzoic acid; the complexing agent is one or more of 2-amino-2-methyl-1-propyl alcohol, acetylacetone, nitrilotriacetic acid, nitrilotriacetic acid sodium salt, acrylate, sodium gluconate and ethylenediamine hydrochloride; the dissolution promoter is an alcohol ether solvent. According to the nickel stripping agent, the oxidizing agent with relatively low toxicity and a non-toxic or low-toxicity non-volatile complexing system are adopted, nickel can be completely removed, a base material cannot be eroded, and the threat to the health of operators can be remarkably reduced.