37 results about "Manganese acetylacetonate" patented technology

The invention relates to a preparation method of flexible carbon fiber with superamphiphobic property, and belongs to the technical field of production of superamphiphobic materials. The preparation method comprises the following steps of dissolving polyacrylonitrile and manganeseacetylacetonate into N,N-dimethylformamide, forming a uniform electrostatic spinning solution, and adopting an electrostatic spinning technique, so as to obtain nanometer spinning fibers; pre-oxidizing the nanometer spinning fibers, placing under the nitrogen atmosphere, and carbonizing at high temperature, so as to obtain manganese-doped nanometer carbon fiber; soaking the manganese-doped nanometer carbon fiber into an ethyl alcohol solution of POTS (1H,1H,2H,2H-perfluorooctyltriethoxysilanes), so as to obtain the flexible carbon material with superamphiphobic property. The preparation method has the advantages that the technology is simple, the shape of the spinning fiber can be adjusted, and the green and environment-friendly effects are realized; the average size of the spinning carbon fiber is 300 to 450nm. The prepared carbon fiber with the superamphiphobic property has the advantages that the contact angle is about 155 degrees at different pH (potential of hydrogen) values, the rolling angle is about 4 degrees, and the contact angles for different types of oil are about 152 DEG C.

The invention discloses an amphiphilic superparamagnetism magnetic resonance contrast medium and a preparation method thereof. The contrast medium takes MnFe2O4 nanometer grains as cores; polyalcohol The invention discloses an amphiphilic superparamagnetism magnetic resonance contrast medium and a preparation method thereof. The contrast medium takes MnFe2O4 nanometer grains as cores; polyalcoholmical compatibility, low toxicity and good stability. The preparation method has the advantages of simple operation, low cost, low requirements on the equipment, and easy realization of industrialiological compatibility, low toxicity and good stability. The preparation method has the advantages of simple operation, low cost, low requirements on the equipment, and easy realization of industrialized production.ized production.olecules evenly clad the surfaces of the MnFe2O4 nanometer grains; and part of hydroxies on the outer ends of the polyalcohol molecules react with 9-fluorenylmethyl chloroformate to form amphiphilicmolecules evenly clad the surfaces of the MnFe2O4 nanometer grains; and part of hydroxies on the outer ends of the polyalcohol molecules react with 9-fluorenylmethyl chloroformate to form amphiphilicshell structures through acyl chloride reactions. The preparation method comprises the following steps: taking the polyalcohol as a solvent, pyrolyzing ferric and manganese acetylacetonates at a highshell structures through acyl chloride reactions. The preparation method comprises the following steps: taking the polyalcohol as a solvent, pyrolyzing ferric and manganese acetylacetonates at a hightemperature to obtain the MnFe2O4 nanometer grains clad by the polyalcohol molecules through, and then carrying out the acyl chloride reaction between 9-fluorenylmethyl chloroformate and polyalcohol htemperature to obtain the MnFe2O4 nanometer grains clad by the polyalcohol molecules through, and then carrying out the acyl chloride reaction between 9-fluorenylmethyl chloroformate and polyalcohol hydroxies on the surfaces of the nanometer grains. The contrast medium has the advantages of small grain size, high crystallinity, high saturation magnetization rate, high relaxation capability, good bydroxies on the surfaces of the nanometer grains. The contrast medium has the advantages of small grain size, high crystallinity, high saturation magnetization rate, high relaxation capability, good biolog

The invention discloses a starch adhesive. The starch adhesive is prepared through the steps of firstly, adding deionized water, polyvinyl alcohol and n-octanol to a reaction kettle with a stirrer, raising the temperature to 88-92 DEG C, and keeping the temperature for 30 min so that polyvinyl alcohol can be completely dissolved; secondly, cooling the mixture to 52-57 DEG C, adding starch, copper sulfate and manganese acetyllacetonate, adding sulfur peroxide after the mixture is evenly stirred, and making the mixture react for 60-80 min under unceasing stirring; thirdly, adding sodium hydroxide (30% solution), regulating the PH value to 9-10, adding melamine, and making the mixture react for 60-80 min; fourthly, adding a sodium thiosulfate (30%) solution, adding the rest of deionized water after the mixture is evenly stirred, conducting stirring for 30-40 min so that the solution can be in the semitransparent state, and then adding polyacrylonitrile and diisocyanate to react for 40-60 min; fifthly, adding potassium sorbate and kaolin, and conducting stirring for 30-40 min to obtain the product. The product is strong in adhesive strength, stable in water resistance, long in storage period, high in drying speed and good in permeability and mobility.

The invention discloses an amphiphilic superparamagnetism magnetic resonance contrast medium and a preparation method thereof. The contrast medium takes MnFe2O4 nanometer grains as cores; polyalcohol molecules evenly clad the surfaces of the MnFe2O4 nanometer grains; and part of hydroxies on the outer ends of the polyalcohol molecules react with 9-fluorenylmethyl chloroformate to form amphiphilic shell structures through acyl chloride reactions. The preparation method comprises the following steps: taking the polyalcohol as a solvent, pyrolyzing ferric and manganese acetylacetonates at a high temperature to obtain the MnFe2O4 nanometer grains clad by the polyalcohol molecules through, and then carrying out the acyl chloride reaction between 9-fluorenylmethyl chloroformate and polyalcohol hydroxies on the surfaces of the nanometer grains. The contrast medium has the advantages of small grain size, high crystallinity, high saturation magnetization rate, high relaxation capability, good biological compatibility, low toxicity and good stability. The preparation method has the advantages of simple operation, low cost, low requirements on the equipment, and easy realization of industrialized production.

The invention relates to a method for preparing 64 Cu marked and folic acid targeted functional trimanganese tetroxide nano-particles with stable polyethyleneimine.The method comprises the steps that folic acid is mixed with NH2-PEG-COOH to obtain FA-PEG-COOH; manganese tris(4-oxopent-2-en-2-oate) is in reaction with PEI to obtain Mn3O4-PEI NPs, FI modification is performed, NOTA-NHS and activated FA-PEG-COOH are added, acetylation is performed, and MOTA-Mn3O4-PEI-Ac-FI-(PEG-FA)NPs is obtained; ammonium acetate is in reaction with [64 Cu]CuCl2 and added to an NOTA-Mn3O4-PEI-Ac-FI-(PEG-FA)NPs solution then, and the nano-particles are obtained after reaction.According to the method, the preparation process is simple and easy to operate; the obtained material has an excellent PET / MR double modal imaging effect, and the method has a potential application value in the multimodal nano contrast agent field.

The invention relates to the technical field of water treatment, in particular to a spinel type ZnFeMnO4 nano material and a preparation method and application thereof. The preparation method of the spinel type ZnFeMnO4 nano material comprises the following steps: A) stirring and mixing zinc acetylacetonate, ferric acetylacetonate, manganese acetylacetonate and an ethylene glycol solution containing polyvinylpyrrolidone to obtain a mixed solution; B) enabling the mixed solution to make reaction at the temperature of 185-190 DEG C; and C) calcining a solid product after the reaction to obtain the spinel type ZnFeMnO4 nano material. In the spinel type ZnFeMnO4 nano material, the unique occupation mode of each element enhances the electron interaction between Fe / Mn, enhances the conductivity of the material and the binding capacity of the material and peroxymonosulfate (PMS), and obviously improves the catalytic activity and selectivity, thereby effectively degrading organic pollutants in water.

The invention discloses a method for preparing flexible carbon fibers with super-amphiphobic properties, belonging to the technical field of super-amphiphobic material production. Polyacrylonitrile and manganese acetylacetonate are dissolved in N,N‒dimethylformamide to form a uniform electrospinning solution, and nano-spun fibers are prepared by electrospinning technology; the nano-spun fibers are first pre-treated After oxidation, it is then placed in a nitrogen atmosphere for high-temperature carbonization treatment to obtain manganese-doped carbon nanofibers; soaking the manganese-doped carbon nanofibers in ethanol solution of POTS to obtain super-amphiphobic flexible carbon materials. The process of the invention is simple, the shape of the spinning fiber can be adjusted, and the invention is green and environment-friendly. The average size of the spun carbon fibers is 300-450 nm, and the prepared carbon fibers with superamphiphobic properties exhibit a contact angle of about 155° and a rolling angle of about 4° at different pHs. The contact angle to different oils is about 152°.

The invention discloses an acetylacetone manganese-initiated RAFT (reversible addition fragmentation chain transfer) polymerization method which comprises the following steps of: preparing a bulk polymerization reaction system comprising a vinyl monomer, an initiator and a chain transfer agent or a solution polymerization reaction system comprising a vinyl monomer, an initiator, a chain transfer agent and a solvent; and performing a polymerization reaction at 25-100 DEG C to obtain a polymer, wherein the molar ratio of the vinyl monomer to the initiator to the chain transfer agent is 200:(0.2-4):(0.5-2), the molar ratio of the vinyl monomer to the solvent is (0.5-3):1, and the initiator is acetylacetone manganese. The method disclosed by the invention adopts acetylacetone manganese as an RAFT polymerization initiator for the first time, is suitable for a wide range of monomers, and is effective to methacrylates, vinyl acetates and styrene monomers; the temperature application range is wider, and the application universality is enhanced; and as an initiator, the acetylacetone manganese can realize a higher end group functional degree of the tail end of the polymer.

The invention discloses a preparation method of micro-branched micro-crosslinked polyacrylamide. The preparation method comprises the following steps: adding an acrylamide monomer of which the mass percent is 20-30% into water; then adding dimethylaminoethyl methacrylate, persulfate, a chain transfer agent, EDTA and manganese acetylacetonate, regulating the pH value to 5-8, and initiating a polymerization reaction at 20-40 DEG C; after 5-10 hours of reaction, taking out a colloid, and performing granulation; and the adding NaOH accounting for 1.5-3% of the mass of the colloid, and performing hydrolysis at 80-100 DEG C for 1-3 hours to obtain the finished product. The micro-branched micro-crosslinked polyacrylamide prepared by the method disclosed by the invention has high viscosity, and has excellent thermal stability and mechanical shearing resistance; and experiments indicate that the viscosity retention rate of the micro-branched micro-crosslinked polyacrylamide disclosed by the invention after mechanical shearing is more than 81%, and the viscosity retention rate after 90 days of aging is 79% or above. The method disclosed by the invention has the advantages of mild reaction conditions, simple operation process, low cost and the like.

The invention relates to a biodegradable plastic and a preparation method thereof, belonging to the technical field of plastic processing, wherein the parts by weight of each component are 16-21 parts of chitin, 2-5 parts of sodium fluorosilicate, 2-5 parts of gelatin, 1~3 parts of calcium carbonate, 1~3 parts of glycerin, 18~22 parts of superfine starch, 1~3 parts of glycerin, 0.4~0.7 parts of stearic acid, 0.4~0.7 parts of oleic acid, 15 parts of low density polyethylene ~20 parts, 15~20 parts of high-density polyethylene, 0.4~0.7 parts of manganese acetylacetonate, the preparation method is to raise the temperature of the container to 75~85°C, put the above raw materials in the container in proportion High to 125~130°C, keep stirring at this temperature and react for 1.5~1.8h, adjust the pH of the reaction solution to 5.8~6.5 with hydrochloric acid to obtain a uniformly dispersed solution; pour the solution into a preheated mold for foaming, The biodegradable plastic is obtained by thermal treatment and demoulding; compared with the same type of products on the market, the plastic has the advantages of lower production price, faster degradation speed, non-toxic, and no pollution to the environment.

The invention provides a manganese composite valence cross-linked substance adsorption catalytic material. The material is prepared from the following raw materials in parts by mass: 1-5 parts of manganese-doped carbon dots; 20 to 40 parts of activated carbon; 10 to 20 parts of aluminum oxide; 15 to 25 parts of manganese cross-linked montmorillonite powder; and 5-10 parts of sodium carbonate. According to the invention, a novel adsorption catalytic material is prepared from a manganese (III / IV) compound in a composite valence state and is used for treating industrial polluted waste gas. The preparation method comprises the following steps: firstly, forming a Mn (IV)-doped carbon dot nano material from gallic acid and manganese dioxide under a hydrothermal condition, then crosslinking montmorillonite with manganese (III) acetylacetonate to obtain an active manganese compound in a middle valence state, and finally, adding activated carbon, sodium carbonate and the like, and granulating and forming to prepare the adsorption catalytic material of a manganese composite valence state (III / IV) crosslinking substance. The raw materials are easy to obtain, the method is simple, operation is convenient, practicability is high, and the prepared adsorption catalytic materials in different shapes have wide application prospects.

The invention relates to catalysts, preparation methods and application fields, in particular to a MnY catalyst used for catalytic removal of formaldehyde in indoor air and a preparation method thereof. The catalyst is composed of a catalyst carrier NaY molecular sieve and an active component Mn, and the active component Mn uses manganese (II) acetylacetonate as a manganese source. The preparation method is as follows: immerse NaY molecular sieve in the acetone solution containing manganese (II) acetylacetonate, stir until the acetone solvent is completely volatilized to obtain the catalyst precursor; perform temperature program activation in the activation atmosphere, then cool to room temperature and take it out to obtain MnY catalyst. The MnY catalyst prepared by this method is used for the removal of formaldehyde in indoor air. Since the surface of the Y molecular sieve is dispersed with Mn oxide active centers that have a good catalytic effect on the oxidation and removal of formaldehyde, the formaldehyde adsorbed on the surface of the Y molecular sieve can be catalytically degraded into CO. 2 and H 2 O, and is not affected by the adsorption capacity. The method is simple, fast, and environmentally friendly, and shows good catalytic performance in indoor catalytic removal of formaldehyde.

The invention belongs to the field of inorganic nonmetallic materials preparation, and relates to a preparing method of a yttrium manganese acid nanometer material. The method comprises the steps of fully dissolving yttrium acetylacetone and manganese acetylacetone in a methanol solution, conducting a solvothermal reaction, conducting filtering and washing, and then conducting drying and calcination cooling to obtain the yttrium manganese acid material. According to the preparing method of the yttrium manganese acid nanometer material, the technology is simple, convenient and easy, the product purity is high, the preparing cost is low, and the size of the yttrium managanese acid nanometer material is 20-30 nm; in addition, both the homogeneity and the dispersity of the product are good, the manufacturing technique is simple, the sintering temperature is low, and the yttrium manganese acid nanometer material can be easily applied to mass production in practice. As a photocatalytic material, the yttrium manganese acid nanometer material has a high catalytic activity and has wide application prospects in the field of degradation of dyestuff wastewater and indoor noxious gases, photocatalysis sterilization and the like.

The invention provides a preparation method of graphene / LaMnO3 composite material for a supercapcitor. The preparation method includes the following steps: 1. ultrasonically dispersing graphene oxide in absolute ethyl alcohol to obtain a solution A; 2. dissolving lanthanum acetylacetonate and manganese acetylacetonate in propionic acid to obtain a solution B; 3. uniformly mixing the solution A with the solution B, and then adding a mixed solution to a rotary evaporator for rotary evaporation treatment to obtain a precursor C in a gel state; and 4. Performing high-temperature thermal treatment on the precursor C under the protection of reducing gas to obtain the graphene / LaMnO3 composite material for the supercapacitor. The preparation technology is simple, the cost is low, and the prepared graphene / LaMnO3 composite material has relatively high specific capacitance and relatively good cycle stability, and is suitable for large-scale production.

The invention discloses a preparation method and biological application of T1-T1 synergistic effect gadolinium chelate manganous-manganic oxide nano particles. The preparation method and the biological application of the T1-T1 synergistic effect gadolinium chelate manganous-manganic oxide nano particles include that firstly manganeseacetylacetonate is combined, and then oleylamine is used as a solvent, a high-temperature pyrolysis method is used to combine oil solubility manganous-manganic oxide nano particles, and then a ligand exchange method is utilized to use alendronate to be exchanged on the surfaces of the manganous-manganic oxide nano particles, so that nano particles are formed, wherein the surfaces of the nano particles are provided with a large number of amino groups. Then, the surfaces of the amino groups are connected with diethylenetriamine pentaacetic acid, so that the surfaces of the nano particles are provided with a large number of carboxyl groups, and at last a chelate effect is utilized to enable the large number of carboxyl groups and gadolinium to be chelated. Therefore, gadolinium chelate manganous-manganic oxide nano particles are obtained. The preparation method is low in requirement for equipment, convenient for operated process, low in needed raw material cost, and nuisanceless in accessory products. And at last through in vitro and in vivo magnetic resonance imaging experimental testing, so that compared with independent manganese and independent gadolinium, T1 magnetic resonance imaging contrast effect is strengthened.