37 results about "Manganese acetylacetonate" patented technology

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 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 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 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.