35results about How to "Uniform shape distribution" patented technology

The invention discloses a layered porous Fe 3 Se 4 @NC@CNTs composites and their preparation and application in sodium-ion batteries. Fe(NO 3 ) 3 , CNTs, CH 4 N 2 O, NaCl nanoparticles were encapsulated into the polymer fiber network and then calcined in protective gas to obtain hierarchical porous Fe 3 Se 4 @NC@CNTs Composites, Fe 3 Se 4 The nanoparticles are well coated in the porous carbon structure, and the CNTs are intertwined to form a 3D conductive network. The invention is easy to operate, the reaction conditions are controllable, the obtained 3D hierarchical porous structure is special, and the specific surface area is large, which not only facilitates the full contact between the electrolyte and the active material, but also effectively adapts to the volume expansion of the material during the charge and discharge process , when used as the anode material of sodium ion battery, its electrochemical performance is greatly improved.

The invention discloses a semi-dull material for a BOPP semi-dull transfer base film, and a preparation method and an application thereof. The semi-dull material comprises, by weight, 66.7-86.9 partsof PP resin, 8-18 parts of HDPE, 5-15 parts of a compatibilizer, and 0.1-0.3 part of an antioxidant. The invention also discloses a preparation method of the semi-dull material for the BOPP semi-dulltransfer base film. The preparation method comprises the following steps: proportioning materials, mixing the materials in a mixer for 8-10 min, carrying out melt extrusion to obtain strips, and pelletizing and drying the strips to prepare the finished granular product. The invention further discloses an application of the semi-dull material for the BOPP semi-dull transfer base film in the BOPP semi-dull transfer base film. The surface of a dull layer using the BOPP semi-dull transfer base film has uniform roughness and uniform raised or sunk morphology distribution, and the dull layer has a stable dull layer, has a good transfer effect and realize an excellent decoration effect.

The invention discloses a self-assembly nanosphere or hydrogel based on commercial amino acid and a preparation method thereof. The method provided by the invention comprises the following operating steps: taking a certain amount of commercial amino acid, dissolving by the use of dimethyl sulfoxide to obtain a stock solution, diluting by the use of a phosphoric acid buffer at a pH of 7.4, and performing ultrasound so as to obtain the nanosphere or hydrogel. The nanosphere prepared in the invention is simple and cheap, morphology and distribution of the nanosphere are uniform, and the size of the nanosphere is easy to regulate and control according to concentration. According to the prepared hydrogel, gelation can be realized only by ultrasound; and the hydrogel is not easy to deteriorate. The nanosphere and hydrogel obtained in the invention are based on the commercial amino acid which are cheap and can be obtained in quantity. In addition, the preparation method is simple and fast. The prepared material has good stability, and the preparation method paves the way for industrial application of the nanosphere and hydrogel.

The invention relates to the technical field of basic cupric carbonate micro-powder preparation and especially relates to a sheet-shaped self-assembled basic cupric carbonate flower-type ball and a simple preparation method thereof. The sheet-shaped self-assembled basic cupric carbonate flower-type ball is prepared from basic cupric carbonate nanosheets through assembling, the diameter of the flower-type ball is 1 to 10 microns, and the particle shapes of the flower-type balls are uniform. The preparation method comprises carrying out ultrasonic mixing on an aqueous solution of a soluble copper salt and an absolute ethanol-water solution of L-aspartic acid, putting the mixture in a constant-temperature blast oven, carrying out a reaction process and then treating the product to obtain a basic cupric carbonate flower-type ball powder material. The L-aspartic acid, the soluble copper salt, the anhydrous ethanol and the deionized water are mixed under ultrasonic agitation and undergo a hydrothermal reaction to produce the sheet-shaped self-assembled basic cupric carbonate flower-type ball. A series of characteristics show that the sheet-shaped self-assembled basic cupric carbonate flower-type ball produced through a system using L-aspartic acid as a template and a raw material has narrow particle size distribution, uniform distribution of morphology and controllability.

The invention discloses a preparation method of cuprous oxide hollow nano-spheres. The preparation method comprises the following steps: dispersing certain amounts of a cupric salt and a surfactant in deionized water, adding a certain amount of a complexing agent until a blue and transparent copper complexing solution is formed, adding a reducing agent, carrying out solid-liquid separation on the above obtained product, washing the obtained solid, centrifuging the washed solid, and carrying out vacuum drying to obtain the cuprous oxide hollow nano-spheres. The preparation method has the advantages of simplicity in operation and short reaction time, and cuprous oxide prepared in the invention has a nanometer scale and uniform morphology distribution.

The invention discloses a heat-insulating and anti-ultraviolet glass film and a preparation method thereof. The preparation method is as follows: S1: dispersing a salicylate compound and a PET resin in an aqueous solution of ethanol to form a coating liquid; S2: dissolving the In the fluidized bed reactor, metal oxide solid particles are passed into supercritical carbon dioxide fluid entrained with coating liquid, so that salicylate compounds and PET resin are coated on the surface of metal oxide solid particles, and modified metal oxides are obtained. Oxide solid particles; S3: Mix the modified metal oxide solid particles, coupling agent, additives and PET uniformly to form a casting solution and pour it into a mold to obtain the glass film. The preparation method of the glass film of the present invention not only improves the heat insulation and anti-ultraviolet performance of the glass film, but also makes the overall performance of the glass film more uniform, prolongs its service life, and is more conducive to large-scale popularization and application.

A lanthanum-cerium co-doped neodymium-iron-boron isotropic bonded magnetic powder and a preparation method thereof, the chemical formula of the magnetic powder is expressed as: [RE 1‑x (LR) x ] a Fe 100‑a‑b‑c m b B c , where 0.05≤x≤0.7, 11≤a≤13, 0≤b≤1.55, 5.5≤c≤6.2, RE is Nd or a combination of Nd and any one or several rare earth elements except La and Ce, LR Represents rare earth elements La and Ce, M is Al and / or Nb. Wherein, the grain size of the magnetic powder is 20-70nm. The present invention uses relatively surplus and cheap rare earth lanthanum and cerium to partially replace the neodymium element in NdFeB, and controls the ratio of lanthanum and cerium and the ratio of lanthanum and cerium to neodymium, and adds an appropriate amount of Nb and / or Al elements to suppress α-Fe The precipitation can reduce the irreversible loss of magnetic flux and increase the coercive force. By combining the rapid quenching process and parameter control, while saving costs, it can also maintain good magnetic properties and make comprehensive and balanced utilization of rare earth elements.