53results about How to "The preparation process is easy to implement and flexible" patented technology

The invention discloses a two-dimensional noble metal nanometer material and a preparation method thereof. The material comprises a substrate and a noble metal on the substrate; particularly, a gold film is covered on the substrate, vertical noble metal nanometer sheets are arranged on the substrate covered by the gold film and have the height of 0.5 microns to 1.5 microns, the width of 0.5 microns to 2.5 microns and the thickness of 15 nm to 25 nm, and the noble metal is metal gold, metal silver or metal platinum. The method comprises an electrodeposition method which comprises the followingsteps: firstly, depositing the gold film on the surface of the substrate; putting the substrate as a cathode into an electrolyte to electrolytically deposit for 3 hours to 7 hours under a current of 1to 50 microampere / cm<2>, wherein the electrolyte is prepared by an acid solution of the noble metal and polythene pyrrolidone according to the density of 1g / L:3 to 7g / L; and then, washing and dryingto prepare the two-dimensional noble metal nanometer material. The product can be widely applied to the fields of biomedicine, diagnosis, and the like. The preparation method needs raw materials having fewer types and low cost and being easy to get, has simple technological process and no environmental pollution and is easy to realize the industrialized production.

The invention discloses a polyvinyl alcohol / inorganic nanometer oxide particle composite material and a preparation method thereof. The material has a core-shell structure taking inorganic nanometer oxide particles as a core and polyvinyl alcohol as a shell, the core and the shell are connected by a chemical bond of M-O-C bond and a hydrogen bond, and the M in the M-O-C bond is Si or Al or Ti or Zn; and the method comprises that: firstly, the inorganic nanometer oxide particles are dispersed in low molecular alcohol or by a sol-gel method to prepare dispersoid or low molecular alcosol of the inorganic nanometer oxide particles; the dispersoid or low molecular alcosol is added with an initiator and vinyl acetate monomer for even mixing, and the mixture is subjected to polymerization reaction at a temperature of between 60 and 70 DEG C to prepare a polyvinyl acetate / inorganic nanometer oxide particle complex; and finally, the complex is added to alcoholic solution of alkali with the concentration between 0.1 and 1M for alcoholysis reaction at a temperature of between 25 and 45DEG C for 1 to 2 hours to prepare the polyvinyl alcohol / inorganic nanometer oxide particle composite material. The polyvinyl alcohol / inorganic nanometer oxide particle composite material can be used in the fields such as fibers, package materials, paper processing agents, binding agents, carrier materials, optical materials, film materials and the like.

The invention discloses a nano chain composed by metallic nickel particles connected by copper oxide films and a preparation method thereof. The nano chain is formed by the alternative connection of the metallic nickel particles and the copper oxide fims, wherein the diameter of each metallic nickel particle is 6 nm to 130 nm, the film length of each copper oxide film is 15 nm to 50 nm, the film width of each copper oxide is 30 nm to 50 nm and the film thickness of each copper oxide is 1 nm to 10 nm. The preparation method of the nano chain composed by the metallic nickel particles connected by the copper oxide films comprises the following steps: firstly, an aluminum sheet is processed through an anodic oxidation method so that a through-hole alumina template is obtained; a gold film is plated on one side of the through-hole alumina template in an evaporated mode and then the through-hole alumina template is used as a negative pole and placed in copper electrolyte and nickel electrolyte respectively for multiple alternative electrolytic depositions, so that the alumina template is obtained, wherein the through holes of the through-hole alumina template are placed with the copper cylinders and the nickel cylinders, the copper cylinders and the nickel cylinders are connected alternatively and one side of the alumina template is plated with the gold film; then the alumina template is soaked in aqueous alkali, so that a nano chain array which is formed by the alternative connection of copper oxide films and nickel particles is obtained; and finally the nano chain array is placed in ethylalcohol for ultrasonic dispersion, so that target production is obtained. The nano chain composed by the metallic nickel particles connected by the copper oxides and the preparation method thereof can be widely applied to magnetic recording, micro-mechanical sensors and biological medicine filed, such as the deliver of medicine, hyperthermia and magnetic separation.

The invention discloses a nano composite ethylene-propylene rubber cable material and its preparation method. The material is composed of ethylene-propylene-diene rubber, a nano compound, an organic modifier, inorganic metal hydroxide, an aging resister, a curing active agent and a peroxide according to 100:1-20:0.5-10:50-200:0.5-10:10-20:0.1-10, wherein, the nano compound is nano montmorillonite and nano calcium carbonate according to the weight ratio of 1:0.5-2, the organic modifier is a silane coupling agent or a titanic acid coupling agent or methacrylic acid or acrylic acid, the curing active agent is zinc oxide and stearic acid, the peroxide is dicumyl peroxide. The preparation method comprises the following steps: proportioning the raw materials according to the weight, successively adding the raw materials with the corresponding weight into an open mill or an internal mixer for mixing, placing on a plate vulcanizing machine for vulcanizing, producing the products with zero-halogen flame-retardant, age resistance and excellent mechanical property. The products is suitable for the occasions with requirement of zero-halogen flame-retardant, age resistance and frequent movement in the nuclear power plants, warships, mining industry and the like.

The invention discloses a micron semisphere composed of silver nano-flakes as well as a preparation method and a use thereof. The micron semisphere with the diameter of 1-30mu m is formed by stacking the silver nano-flakes adhered to a conducting substrate into a sector plate, wherein, the plane of the sector plate is vertical to the center of the semisphere; and the nano-flakes forming the sector plate are of a single crystal structure of silver, the length is 0.5-15mu m, the width is 20nm-1mu m and the thickness is 20-50nm. The preparation method comprises the following steps: firstly evenly mixing a silver nitrate aqueous solution with the concentration of 2-32g / L and a citric acid aqueous solution with the concentration of 8-144g / L based on the volume ratio of (0.8-1.2): (0.8-1.2) to obtain an electrolyte; and taking the conducting substrate as a cathode and a graphite flake as an anode to be placed in the electrolyte, and carrying out electro-deposition under constant current with the density of 0.1-1mA / cm<2> for 10-180 minutes to finally obtain the micron semisphere composed of the silver nano-flakes. The obtained micron semisphere can be utilized as a surface enhanced Ramanscattering (SERS) active substrate so as to measure content of rhodamine or polychlorinated biphenyls (PCBs) or p-methyl benzenethiol adhered thereon by utilizing a confocal Raman spectrometer.

The invention discloses an electrostatic condenser based on nano electrodes and a preparation method of the electrostatic condenser. The condenser comprises two groups of pore arrays which are inserted into each other in parallel, are not communicated with each other, are provided with openings towards different surfaces and are arranged in an anode aluminum oxide template, wherein carbon nano tubes electrically connected with conductive films covering the surfaces of the pore arrays are deposited in pores. The method comprises the following steps of: preparing a secondary aluminum oxide template in a secondary anode oxidation method, wherein one surface of the template is provided with a first pore array, and the back of the template is provided with gaps which are parallel to pores of the first pore array and formed in the circumference of an arc barrier layer formed by the pores of the first pore array; corroding the back of the secondary aluminum oxide template in an acidic copper chloride solution to obtain the anode aluminum oxide template on one surface of which the first pore array is arranged and on the back of which a second pore array is arranged; and depositing the carbon nano tubes in the pores of the first pore array and the second pore array by a chemical vapor deposition technology, and performing evaporation on the conductive films on the two surfaces of the anode aluminum oxide template, thus obtaining the target product. The electrostatic condenser can be widely applied to the field of energy storage and utilization.