57results about How to "High particle content" patented technology

(EN) The invention concerns a method for producing a thermoplastic molding material or element, said material or element containing nanometric inorganic particles. In molten state, the thermoplastic is mixed with the nanometric inorganic particles and with a solubilizing agent in a conveyor screw extruder, the pressures and temperatures being adjusted so that the plastic is in melt form and the solubilizing agent in supercritical state. The invention is characterized in that at the output of the extruder, the mixture passes through a slot with a passage less than 20 $g(m)m to penetrate into an expansion zone and the molten material, wherein are incorporated the nanometric inorganic particles, is evacuated, reduced into molding material after cooling or transferred into a molding tool to be molded. The invention also concerns the molding material and the molding elements obtained by this method, as well as the uses thereof.

The invention relates to the preparation of organic macromolecule compounds and the technical field of pipeline systems, in particular to a method for preparing a poly alpha-olefin drag reduction agent suspension. A solvent comprises 15-45 percent of poly alpha olefin particles, 5-15 percent of long carbon chain amide, 50-60 percent of solvent, 1-5 percent of surface active agent, 0.1-2 percent of thickening agent, and 10-20 percent of suspending agent and stabilizing agent according to the proportion when the total weight of the solvent is 100, and long carbon chain amide powder particles are fully contacted in the solvent containing at least one surface active agent and emulsified at a certain temperature, and the alpha-olefin drag reduction agent suspension is obtained by adding ground poly alpha-olefin particles with super high molecular weight and at least one of a surface active agent, a suspending agent, a stabilizing agent and a dispersing agent into the emulsified solvent. The suspension prepared by the method has long storage cycle, high content of poly alpha-olefin particles, large drag reduction rate, and low transportation and preparation costs.

The invention provides a biomass load type nano-metal catalyst and a preparation method and application thereof. The catalyst is MNPs@AOFC, and the loading capacity of MNPs is 1.6-25.8 mg/g. The metal is a precious metal or CU, and the particle size of the metal nano particle is 3-60 nm. In amidoxime group functionalized cellulose, the mass content of the amidoxime group is 3.88-16.84%; the cellulose is bacterial cellulose. The AOFC carrier both serves as a reducing agent and a stabilizer, reaction is carried out for 2 hours under a hydrothermal condition to uniformly load the metal nano particles on the surface of the AOFC carrier, and amidoxime groups with different mass percents can be controlled to obtain the catalyst of the metal nano particles with different particle sizes. The catalyst has good stability, and the metal catalyst with a unit mass can continuously reduce more than 3500 times of p-nitrophenol. The catalyst can be applied to catalytic reduction reaction.

The invention discloses a four-step method for processing and recycling tin ore floatation wastewater, which comprises a new floatation technique, chemical treatment, physical treatment and biological treatment. The four-step method is characterized in that the principle of putting prevention first and providing prevention and control is adopted. The method is as follows: the new floatation technique and process are utilized to reduce the floatation wastewater and the microgranular particles from the headstream and reduce the usage amount of floatation reagents; because the chemical treatment method is used, the concentration of polyacrylamide in the tin ore floatation wastewater is increased from 0.5 percent to 0.9-1.1 percent, and the settling rate of part of the wastewater is improved; the physical treatment method is adopted to increase the settling distance and the settling time, the settling distance is extended for another 600 to 800m on the basis of 200m, and the settling time is increased for another 25 to 27 hours on the basis of 10 hours; aquatic organisms or plants, such as fish, frogs, aquatic weeds and the like are adopted to process the wastewater, the ecological reconstruction is realized, the agricultural irrigation standards are met, the utilization ratio of floatation return water is improved from 86 percent to above 97 percent, and peaceful and friendly coexistence of human and environment is realized.

The invention relates to the technical field of preparation of nanomaterials, in particular to a preparation method of a polyethylene glycol/ZnO/Ag nanoparticle composite fiber, and aims to provide the preparation method of a polyethylene glycol/ZnO/Ag nanoparticle composite fiber material. The preparation method comprises the following steps of: preparing spinning solution; preparing [PEG+PVP]/[Zn(NO3)2+AgNO3] composite nanofiber; and preparing ZnO/Ag composite nanofiber. The method has the advantages of simple process, low cost and capabilities of improving the dispersibility of the nanoparticles in polymer solution and the uniformity of the obtained fiber and being applied to a gas sensitive sensor.

The invention relates to a hot pressing sintering particle reinforcing zinc-based composite material and a preparation method thereof, and belongs to the technical field of composite material preparation. The method includes the steps of preparing Zn powder, Al power, Cu power and TiB2 power as raw materials according to the mass ratio of 50-90 to 15-40 to 1-3 to 1-20, conducting high energy ball-milling and prepressing, and then obtaining the hot pressing sintering particle reinforcing zinc-based composite material through a segmented sintering method. The prepared components are reasonable in design, the preparation process is simple, and the zinc-based composite material which is high in interface combination strength and low in porosity and defect rate is obtained through the coordinative effects of all the components and all parameters.

The invention discloses a cement grinding aid. The cement grinding aid contains the ingredients in parts by mass: 4-20 parts of triethanolamine, 5-20 parts of ethylene glycol, 5-10 parts of ammoniom acetate, 18-23 parts of urea, 3-5 parts of unsaturated polyester resin, 30-40 parts of paper pulp waste lye, 4-12 parts of carboxymethyl cellulose and 5-10 parts of sodium sulfate. According to the cement grinding aid, carboxymethyl cellulose and sodium sulfate are added based on the original cement grinding aid, and carboxymethyl cellulose in the grinding aid can be used for overcoming the phenomenon of powder agglomeration and improving the gradation of granules. Sodium sulfate can be used for accelerating the hydrating and hardening speed of cement, and the degree of hydration of the cement can be increased through using sodium sulfate and triethanolamine in a matched manner. The condition that the fluidity and cohesion of the cement granules are not high can be changed through using carboxymethyl cellulose and sodium sulfate in a matched manner, the fluidity of cement powder can be improved by hydrophobic groups in carboxymethyl cellulose and hydrophilic group molecules in sodium sulfate, and the powder material can be fully ground, so that the fineness and strength of the cement can be improved.

The invention discloses a transgranular grain boundary distribution micro-nano complex particle reinforced aluminum base composite material and a preparation method thereof. Firstly, K2TiF6 powder isfed in a pure aluminum melt to prepare an uniform-structured Al-Al3Ti intermediate alloy through assistance by ultrasonic stirring; the average particle size of Al3Ti particles in the obtained Al-Al3Ti intermediate alloy is smaller than 5 microns; then, the K2TiF6 powder and KBF4 powder are mixed according to a mole ratio of 1: 2, and are fed in the pure aluminum melt to prepare an uniform-structured Al-TiB2 intermediate alloy through assistance by ultrasonic stirring; the average particle size of TiB2 particles in the obtained Al-TiB2 intermediate alloy is smaller than 100 microns; finally, Al, the Al-Al3Ti intermediate alloy and the Al-TiB2 intermediate alloy are used as raw materials, or Al, alloy elements, the Al-Al3Ti intermediate alloy and the Al-TiB2 intermediate alloy are used as the raw materials; the raw materials are molten; reinforced particles are dispersed through assistance by ultrasonic stirring; and a transgranular grain boundary double-reinforcement aluminum base composite material is obtained after casting.

Nasal implant obtained by additive manufacturing, comprising a main portion and a return portion connected by an intermediate portion, the main and return portions forming an angle of between 25° and 90°,

• • said implant is made from a biocompatible ceramic of synthetic origin;
  • said implant has an average macroporosity characterized by:
    • a density of material of between 20% and 95% by volume, said density of material being higher in said intermediate portion than in said main portion;
    • cavities defining sections of cavities, said sections of cavities each having a diameter of between 0.3 mm and 1 mm;
  • said sections of cavities each having an area and a form substantially equal over the entire implant.

The invention discloses a pond engineering circulating water zero-discharge culture system. The culture system comprises a culture area, a sewage collection area, a waste collection area, a solid-liquid separation device, a purification area I, a filter feeding area, a sedimentation area, a biochemical area and a purification area II. The sewage collection area is used for collecting sewage generated in the culture area, and the waste collection area is used for collecting sewage in the sewage collection area and conducting layering; the solid-liquid separation device is used for carrying outsolid-liquid separation on the bottom-layer sewage, and the purification area I is provided with an aquatic plant floating bed I; filter feeding organisms are cultured in the filter feeding area, andthe sedimentation area is used for settling the sewage; the biochemical area is used for receiving supernatant liquor and supernatant liquid and performing aeration treatment on mixed liquid; and thepurification area II is used for purifying and treating the mixed liquid treated by the biochemical area and conveying a purified water body to the culture area. According to the sewage collection area, a flow field in circulating water and a space of an outer pond are reasonably utilized, culture tail water treatment and production are organically combined together, 60%-90% of water body area canbe used for tail water treatment, and large-density culture can be realized.

A Ni-P-PTFE anti-scale plating by rear earth cerium-induced ultrasonic chemical codeposition and a preparing process thereof are disclosed. The PTFE content in the plating is increased by rear earth cerium ultrasonic induced codeposition. The Ni-P-PTFE anti-scale plating (2) is prepared on a C45 steel plate (1) substrate. The content of PTFE particles in the plating (2) is 30-40 vol%, and the scaling rate is 0.000010-0.000001 g*m<-2>h<-1>. The preparing process comprises steps of: 1) preparing a sample and performing oil removing treatment and rust removing treatment; 2) dispersing PTFE emulsion by an activating agent; 3) preparing a plating solution; 4) mixing the PTFE activating solution and the plating solution; 5) activating the sample, and performing cerium-induced ultrasonic chemical codeposition; 6) drying; and 7) performing performance detection. The beneficial effects of the anti-scale plating and the preparing process are that: (1) the activating agent can uniformly disperse the PTFE particles; (2) the combination of rare earth-induced codeposition and ultrasonic wave plating allows the PTFE particles in the plating to be high in content and uniform in distribution; and (3) the prepared Ni-P-PTFE plating has a good anti-scale property.

The invention provides a preparation method of superparamagnetic carboxylated chitosan/Fe3O4 nanoparticle aggregate. The method comprises the following steps: (1) preparing a stable superparamagneticFe3O4 nanoparticle water dispersion solution of carboxylated chitosan; (2) dissolving an emulsifier into a non-polar solvent to obtain an emulsifier solution; (3) dissolving hydrophilic metal salt orthe hydrophilic metal salt and the carboxylated chitosan into the superparamagnetic Fe3O4 nanoparticle water dispersion solution, so as to obtain a dispersion solution A; then adding the dispersion solution A into the emulsifier solution and stirring and pre-emulsifying to obtain crude emulsion; then putting a container filled with the crude emulsion into an ice water bath; carrying out ultrasonictreatment to obtain reverse-phase fine emulsion; and (4) directly dropwise adding a crosslinking agent into the reverse-phase fine emulsion, and enabling the crosslinking agent and the carboxylated chitosan to react to obtain the superparamagnetic carboxylated chitosan/Fe3O4 nanoparticle aggregate. The method provided by the invention is simple and efficient; and the prepared superparamagnetic nanoparticle aggregate has the advantages of good dispersity, high magnetic component content, strong magnetic responsibility, excellent biocompatibility and the like.

The invention discloses an aqueous nanometer inorganic oxide-organic hybrid coating composition and its preparation method and application. The coating composition contains at least one aqueous film-forming organic high polymer, at least one nanometer inorganic oxide particle and at least one amphoteric hyperbranched resin. The invention provides a simple method for solving the problem of compatibility and stability of nanometer inorganic oxide-organic hybridization through an amphoteric hyperbranched polymer additive. Through introduction of the amphoteric hyperbranched resin in the coating composition, the compatibility of the nanometer inorganic oxide particles and the aqueous film-forming organic high polymer is improved so that the coating is not easily cracked at high nanometer inorganic oxide particle content. The surface morphology of the coating changes, the coating surface hydrophilicity is improved and the coating stain resistance is improved.

A floor machine comprising a motor, a body, and a dust collection system. The dust collection system comprises a skirt, which is coupled to the floor machine and forms a cavity over the body and a floor treatment pad. The skirt includes an air channel device secured to a bottom edge of the skirt. The air channel device encircles the floor treatment pad and comprises a multiplicity of slots between a floor and the skirt. Jointly, the skirt and air channel device confine particles within the cavity. A vacuum for sucking the particles from the cavity creates high velocity air flow through the air channel device. Negative pressure within the cavity prevents particles from escaping. The particles are removed from the cavity through a vacuum tube into the vacuum.

The invention discloses a novel cement grinding aid, which comprises the following raw materials by weight: 20-30 parts of allyl alcohol, 20-30 parts of diethanolamine, 20-30 parts of maleic anhydride, 10-15 parts of sodium lignin sulfonate, 1-8 parts of sodium pyrophosphate, 1-10 parts of a magnesium lignin sulfonate salt, 1-5 parts of sodium dodecylsulfonate, and 5-10 parts of carboxymethylcellulose. The invention provides the novel cement grinding aid, wherein the carboxymethyl cellulose is added in the formula of the cement grinding aid, such that the powder agglomeration phenomenon is significantly solved, the gradation of the particles is improved, the particle content of the micro-powder is increased, the fluidity of the cement powder is accelerated, and the powder material is sufficiently grinded so as to improve the fineness and the strength of the cement.

The invention discloses an efficient and automatic sewage suction device for pond engineering circulating water. The sewage suction device comprises a plurality of grids, a sewage suction cover, at least two water outlet pipes, a plurality of rows of ultraviolet fluorescence sensors, a plurality of sewage suction pipes, a sewage suction pump and a controller. The grids are parallel to one anotherand are arranged at the bottom of a sewage collecting area at equal intervals, and a plurality of water flow grooves are formed by the grids and the bottom wall of the sewage collecting area. The sewage suction cover is in an inverted U shape, covers the two adjacent grids and defines a water flow channel with the water flow grooves. The two water outlet pipes are arranged in parallel and fixed tothe inner walls of the two opposite sides of the sewage suction cover. A plurality of water outlets are formed in each water outlet pipe at equal intervals. The multiple rows of ultraviolet fluorescence sensors correspond to the multiple water flow grooves respectively, and each row of ultraviolet fluorescence sensors are installed on the bottom walls of the corresponding water flow grooves. Thedevice can automatically detect and suck deposited particles, operation is more convenient, the content of the particles in sucked sewage is higher, the sewage suction effect is better, and the sewagesuction efficiency and the sewage suction effect can be improved.