121 results about "Triiron Tetraoxide" patented technology

The invention discloses a preparation method of doxorubicin hydrochloride magnetic nanoparticles. The preparation method comprises the following steps: (1) dissolving nano block polymer polyethylene glycol-polylactic acid in dimethyl formamide to prepare a solution A; (2) dissolving doxorubicin hydrochloride in dimethyl formamide to prepare a solution B; (3) adding triethylamine into the solution B, and performing the deionization ultrasonic dissolving on the doxorubicin hydrochloride; (4) dissolving ferroferric oxide powder in tetrahydrofuran, and ultrasonically dispersing to obtain a solution C; (5) dropwise adding the deionized solution B into the solution A under a stirring condition; (6) stirring and uniformly mixing the doxorubicin hydrochloride and nano blocks, and volatilizing organic solvent to obtain medicine carrying micelle; (7) dropwise adding the solution C into the medicine carrying nano micelle obtained in the step (6), and uniformly stirring; (8) dialyzing to obtain magnetic medicine carrying nano micelle; and (9) adding a freeze drying protective agent into the nano micelle to obtain the magnetic medicine carrying nanoparticles. The method is simple in operation procedures and easy in operation.

The invention provides a method for preparing carbon / calcium phosphate / ferroferric oxide composite structured nano particles, and application of the nano particles. The method comprises the following steps: by taking calcium hydroxide, polyacrylic acid, isopropanol, ferrous chloride and diammonium phosphate as raw materials, performing calcining, mixing, drying and the like, thereby obtaining the carbon / calcium phosphate / ferroferric oxide composite structured nano particles by using the simple method. The prepared product is uniform in particle size, high in photo-thermal conversion efficiency and good in biocompatibility, and has very good application prospects in fields such as photo-thermal treatment, medicine conveying and biological imaging.

Provided are a friction material composition, friction material, and friction member that have excellent fade resistance and abrasion resistance at high temperatures despite not containing copper which has a high environmental burden or containing 0.5 mass% or less of copper. This friction material composition is configured to be a friction material composition that includes a binding agent, an organic filling material, an inorganic filling material, and a fiber substrate, does not include copper as an element in the friction material composition or contains 0.5 mass% or less of copper, and contains one or more types of inorganic filling material selected from -alumina having an average particle size of 10nm to 50 [mu]m, dolomite having an average particle size of 1-20 [mu]m, calcium carbonate having an average particle size of 1-20 [mu]m, magnesium carbonate having an average particle size of 1-20 [mu]m, manganese dioxide having an average particle size of 1-20 [mu]m, zinc oxide having an average particle size of 10 nm to 1 [mu]m, triiron tetraoxide having an average particle size of 1.0 [mu]m or less, cerium oxide having an average particle size of 0.5-5 [mu]m, and zirconia having an average particle size of 5-50 nm.

The invention relates to a functional material for preparing multifunctional healthy running water and a manufacturing method thereof. Composed of component A and component B, component A is composed of tourmaline, ferric oxide, zinc, copper, magnesium, iron, manganese powder and adhesive auxiliary materials, and is made by low-temperature tableting by special equipment ; Component B is a complex ion element, which is composed of medical stone, wood fish stone, fine wine jade, sepiolite, biotite, volcanic slag, calcium sulfite and clay, and is formed by sintering at high temperature; the preparation of component A : The materials are weighed in proportion, after mixing, heating, cooling, and ball milling to pulverize into micron-sized powders; adding binder to the mixed powder after ball milling and mixing; forming flakes with a punching machine; the prepared black The slices are sent to the heating furnace again to maintain a constant temperature; after cooling, they are packaged for later use. Preparation of component B: Weigh the materials according to the proportion and mix them one by one evenly, add the binder and mix them into agglomerates; inject the agglomerates into the tablet press machine to make sheets, and sinter them in a special sintering furnace after drying. Get the desired product. The water quality after being treated by the multi-functional healthy living water material prepared by the present invention has no toxic and harmful substances to the human body, and has no peculiar smell and good taste; the water body has moderate hardness and contains minerals and trace elements needed by the human body; the water body is weakly alkaline Nature, small molecular group water, the oxidation-reduction potential of water is reduced to a negative value at -200 ~ -550MV, and the nutritional and physiological functions of the water body are strong.

The invention discloses a magnetic ZnO / Fe3O4 composite catalyst as well as a preparation method and application thereof. The preparation method of the composite catalyst comprises the following steps: under an inert atmosphere, dissolving iron oxide and zinc salt according to the ratio in a solvent, mixing an aqueous solution of sodium borohydride and carrying out reduction reaction and after the reaction is completed, drying the obtained precipitate to obtain the composite catalyst. The deficiencies of the prior art are overcome, the invention provides the magnetic ZnO / Fe3O4 catalyst which has the advantages of simple preparation, cheap raw materials and high catalytic activity and the preparation method thereof. By the catalyst, the removal rate of crystal violet in the Fenton reaction can be obviously increased.

The invention discloses a method for preparing triiron tetraoxide nanometer particles. A hyperbranched polymer is hydrophobically modified by fatty acyl chloride to prepare an amphiphilic hyperbranched polymer; and the highly dispersed triiron tetraoxide nanometer particles are prepared via a water / organic one-step solvothermal method by virtue of the micelle self-assembly effect of the amphiphilic hyperbranched polymer as a protective agent in a solution, the average particle size of the triiron tetraoxide nanometer particles is 8nm-35nm; the surfaces of the triiron tetraoxide nanometer particles are amphiphilically modified by virtue of encapsulation and dispersion effects of the amphiphilic hyperbranched polymer on the triiron tetraoxide nanometer particles, so that triiron tetraoxide nanometer particles are dispersed and stably exist in solvents with different degrees of polarity, at the same time, a plurality of active groups are given on the surface of the particles, the active groups provide possible sites for the secondary functionalization of particles and the application range of the triiron tetraoxide nanometer particles is extended.