124results about How to "Avoid secondary reunions" patented technology

The invention discloses a silicon-carbon composite cathode material with a three-dimensional preformed hole structure and a preparation method thereof. According to the composite cathode material, a carbon material having high electric conductivity and a stable structure is used as a matrix for dispersedly containing high-volume silicon particles, and proper three-dimensional expansion spaces are reserved around one or several silicon particles. The preparation method comprises the following steps of: carrying out surface modification on the silicon particles; coating the silicon particles by silicon dioxide; coating the silicon dioxide/silicon composite particles by carbon source precursors; carrying out high-temperature carbonization treatment; and removing a silicon dioxide template, and the like. When the composite material prepared by the preparation method is used for a lithium ion battery, the reversible specific capacity is high, and the cycle performance is excellent. The silicon-carbon composite cathode material has the advantages of simple preparation process and wide raw material resource and is suitable for industrial production.

The invention aims at the shortcomings that inorganic nanometer particles are easy to conglomerate and poor in compatibility with a polymer, a polymer emulsion is unstable, and directional conglomerating of emulsion bundles is easy to appear and residues are easy to generate during the polymerization process in a traditional inorganic or organic composite emulsion, and provides a preparing method of a composite styrene-acrylic emulsion containing silicon dioxide. The preparing method includes: using an in situ sol-gel method to produce nanometer silicon dioxide particles which are uniformly dispersed in monomer, and controllable in particle morphology and particle diameters; then preparing a seed emulsion containing the silicon dioxide particles after obtaining a styrene-acrylic pre-emulsion by using mixed type emulsifiers; and finally preparing the composite styrene-acrylic emulsion by adopting a seed emulsion polymerization method. By adopting the preparing method, the styrene-acrylic emulsion of which silicon dioxide is high in filling volume, and uniformly and stable dispersed in the emulsion is obtained.

The invention discloses a lithium ion battery film cathode containing a porous polymer elastomer, which comprises a copper foil current collector and a surface coating, wherein the surface coating is uniformly coated on the surface of the copper foil current collector; and the surface coating is formed in a way that a high-capacity nano particle is compounded in a directional porous polymer elastomer. The high-capacity nano particle is loaded in a hole of the porous polymer elastomer through suction filtration, rolling and electrophoresis and coated on the copper foil current collector. The porous polymer elastomer is one of porous polythiophene, porous polypyrrole or porous polyaniline. The film cathode prepared in the invention can effectively prevent the high-capacity nano particle from causing pulverization due to volumetric expansion and causing capacity attenuation due to secondary agglomeration in charge and discharge processes, and improves the circulation property of the nanoparticle. Meanwhile, the porosity of the polymer can ensure rapid transmission of lithium ions in the cathode, thereby achieving the purpose of being rapidly charged and discharged. The cathode prepared in the invention can be directly used in battery assembly without tabletting or filming, and is suitable for industrialized production.

The invention relates to breathable resin with high breathability and a preparation method of the breathable resin. The breathable resin with high breathability is prepared by the following components by weight percent: 35 to 55 percent of calcium carbonate powder, 0.2 to 0.5 percent of antioxidant, 0.5 to 2 percent of processing additive, 5 to 10 percent of color masterbatch, 20 to 30 percent of linear low-density polyethylene, 5 to 20 percent of low-density polyethylene and 5 to 20 percent of metallocene polyethylene. The breathable resin with high breathability is suitable for producing a breathable film with high breathability, the breathability can reach 5000g/m<2>.24h, the breathable resin is applicable to a high-speed production line in the process for manufacturing the breathable film, the production speed can reach 200m/min, and the production state of continuous production for 36 hours without stopping can be realized.

The invention discloses a graphene electric-conduction ink preparation method, a graphene electric-conduction ink film and a graphene electric-conduction ink film composite material film. According tothe present invention, a graphene electric-conduction filler is uniformly dispersed in an alcohol/ketone/ester/ether solvent under the assisting of a cellulose-based dispersing agent through room-temperature stirring and ultrasonic dispersion to obtain high-quality high-stability high-conductivity graphene ink, and further the high-quality high-stability high-conductivity graphene ink is compounded with other functional materials to obtain graphene-based composite ink; the method has characteristics of simple formula, simple process, high efficiency, environment friendliness, low cost and thelike; and the graphene ink and the composite ink are suitable for scrape coating, screen printing, direct writing, ink-jet printing and other processes, and can firmly form pure graphene or graphenecomposite films and patterns on common hard/soft substrates.

The invention discloses a bamboo charcoal, flame retardant and moisture conductive terylene fiber, a preparation method and an application thereof. The terylene fiber comprises the following raw materials in percentage by weight: 5-10 percent of active carbon parent granule and 90-95 percent of copolymerized type phosphorus flame retardant terylene fiber forming resin, wherein the cross section of the fiber is a profile cross section. The terylene fiber has good functions of adsorption, deodorization, bactriostasis and rot resistance and flame retardance, and because the cross section of the fiber is the profile cross section, the moisture conductive function of the fiber is also excellent, thus the terylene fiber has wide range of application. The preparation method of the bamboo charcoal, flame retardant and moisture conductive terylene fiber has strong operability, reasonable process and high production efficiency and can realize industrial mass production.

The invention relates to a preparation method of a resin matrix composite material filled with metal particles, in particular to a preparation method of a resin matrix composite material containing metal particles. The invention is characterized in that: the invention comprises the steps: 1) dried metal powder and surface modifier are mixed with solvent, and then the mixture obtained is heated and refluxed with the protection of inert gas under 80-150 DEG C, thus forming suspension; 2) the suspension is classified to obtain suspension with single particle-sized particles, which is then extracted and filtered, thus obtaining single particle-sized modified metal powder; 3) the modified metal powder obtained in the step 2) is added into the resin matrix, in which thixotropic agent and curing agent are added, and then a vacuum stirrer and a ultrasonic vibrating device are used together to stir and vibrate the mixture obtained; 4) the mixture obtained in the step 3) after mixed is poured into a die for casting moulding, thus obtaining the resin matrix composite material containing metal particles through curing technique. The method is characterized by good dispersion effective of the metal particles and preventing the metal particles from a secondary aggregation.

The invention discloses high-magnetoconductivity soft magnetic alloy powder. The alloy consists is prepared from the following components in parts by mass: 25.0 to 80.0 parts of Fe, 3.0 to 8.0 parts of Si, 15 to 55 parts of Ni, 1.0 to 7.0 parts of B and 1.0 to 5.0 parts of P. The invention further discloses an inductance piece prepared from the high-magnetoconductivity soft magnetic alloy powder, a preparation method of the high-magnetoconductivity soft magnetic alloy powder and a preparation method of the inductance piece. By the adoption of the preparation method disclosed by the invention, the soft magnetic alloy powder with various particle sizes can be prepared, and the soft magnetic alloy powder is high in magnetoconductivity, lower in power loss, higher in apparent density, high in tap density, lower in oxygen content, high in product pressing performance and high in magnetic ring density. Due to small oxygen content, few impurities, small carbon content, uniform alloy components and high sphericity degree, the high-magnetoconductivity soft magnetic alloy powder can be widely used as a raw material of a novel sintered inductor.

The invention discloses water-based high-barrier coating liquid and a production method thereof. The water-based high-barrier coating liquid comprises 0.5-15 parts of a hydroxy group-containing water-soluble polymer, 0.1-15 parts of a nanometer oxide, 0.01-10 parts of graphene, 0.01-5 parts of an organic siloxane coupling agent, 0.1-30 parts of 0.1-mol/L diluted hydrochloric acid and 30-95 parts of a solvent. According to the water-based high-barrier coating liquid and the production method thereof, nanometer oxide particles produced through a sol-gel method are used as a small-size polymerization inhibitor, and are loaded onto the surfaces of the graphene by means of physical adsorption, and polymerization among the graphene can be inhibited, so that the problem of poor dispersity of thegraphene is solved; and by using cross linking of the nanometer oxide and the water-soluble polymer, the synergistic enhanced barrier action of the graphene/polymer on gas is given full play to. Moreover, a process of the production method of the water-based high-barrier coating liquid is simple and easy to implement, and a produced film material has good mechanical performance and package printing performance at the same time, and can be applied to a wide variety of fields of medicines, food, electronic product packaging, encapsulation and the like.

The invention discloses a preparation method of a calcium carbonate based reinforcing agent for a PVC (polyvinyl chloride) advertising film. The preparation method fundamentally comprises the steps of carrying out clean-washing, air-drying and smashing on calcite raw ore; grading by a vibrating screen; mixing for preparation; coating; drying; and modification. The calcium carbonate based reinforcing agent has the beneficial effects that the tensile strength of the PVC advertising film added with the reinforcing agent prepared by the preparation method is improved by more than 10% compared with that of the PVC advertising film added with common heavy calcium carbonate with the same quantity as the reinforcing agent, both the elongation at break and the product glossiness are improved remarkably, an antibacterial characteristic is added, and the filling content can be improved 5% under the condition of the same product quality.

The invention relates to a nano composite diatom ooze coating including a solvent and the following components with the total mass of 100%: 0.5-1.8% of cellulose, 5-18% of tourmaline, 5-15% of titanium dioxide, 4-18% of kaolin, 5-12% of a sepiolite powder, 35-55% of diatomite, 5-12% of a nano noble metal loaded type catalyst, 1-6% of nano activated carbon, 0.5-0.8% of a levelling agent, 1.5-5% of a thickener, 7-16% of a re-dispersible latex powder, and 0-5% of a pigment. The solvent is preferably water, and the amount of the water is 20-30%, preferably 25%, of the total mass of all the components. Nano noble metal particles are loaded on a carrier firstly and then mixed with other powders, so as to prevent an agglomeration effect of the nano noble metal particles. The prepared nano composite diatom ooze coating has extremely strong adsorption and ion exchange, can adsorb formaldehyde in air, and decomposes formaldehyde and other harmful gases under the action of the catalyst.

The invention discloses a method for preparing a nano titanium dioxide/polyacrylate compound emulsion. The method comprises the steps as follows: at a room temperature, mixing 4-10 parts of hexadecyl trimethyl ammonium bromide, 6-14 parts of acrylic acid and 10-30 parts of an acrylate monomer in parts by mass uniformly and then dropwise adding deionized water until the system becomes clear; adding 2-6 parts of butyl titanate and 1-4 parts of a silane coupling agent, then adding 30-50 parts of deionized water, and performing ultrasonic dispersion; and adding deionized water and hexadecyl trimethyl ammonium bromide, raising the temperature, stirring, and dropwise adding a mixed solution of an initiator and deionized water, performing thermal reaction, raising the temperature to 80-90 DEG C, performing thermal reaction for 0.5-3h continuously, and lowering the temperature to the room temperature to obtain the nano titanium dioxide/polyacrylate compound emulsion. The method is simple in process, and avoids a problem of 'secondary agglomeration' of conventional nano titanium dioxide in a polymerization process of the emulsion effectively, so that a polymerization reaction can proceed smoothly. The prepared nano titanium dioxide/polyacrylate compound emulsion has good stability.

The invention relates to a boron nitride nanosheet, in particular to a preparation method of a two-dimensional boron nitride nanosheet. The preparation method comprises: subjecting blocky hexagonal boron nitride, as a raw material, and a solid intercalation agent, which may fully decompose into gas after being heated, to premixing according to their mass ratio of 1:(5-50) to obtain a mixture; adding the premixed mixture into a ball mill tank, adding milling balls different in size according to a ball-to-material ratio of (6-80):1, with total charge quantity 1/3-2/3 of the ball mill tank by volume, stirring at the speed of 100-400 r/m for ball milling for 2-12 h so that edge defects occur to the boron nitride and the intercalation agent is embedded in the boron nitride for intercalation toobtain a boron nitride mixture physically intercalated with the intercalation agent, which is a uniform white solid mixture; heating the white solid mixture to obtain solid two-dimensional boron nitride nanosheet powder; alternatively, dispersing the white solid mixture in isopropanol to obtain two-dimensional boron nitride nanosheet dispersion.

The invention discloses a preparation method of organic modified graphene and belongs to the field of preparation of two-dimension nano material graphene. The method is characterized by taking low-cost raw graphite as the raw material, adding different masses of dry ice for creating high-pressure and high-energy environment, preparing graphene via a ball milling method, simultaneously introducing nitrogenous organic matters in the ball milling process, taking nitrogenous organic matters as friction agents and modifiers for simultaneously preparing graphene and carrying out in-situ modification to prepare a nitrogenous organic matter modified graphene structure. Through the preparation method of organic modified graphene, graphene with a circular microstructure is prepared by controlling reaction time, reaction pressure and the ratio of the raw graphite to the nitrogenous organic matters; a low-cost and high-efficiency method for preparing graphene with organic modified surface and complete body structure is developed; the problems of high cost, long preparation cycle, low dispersibility and poor interfacial adhesion caused in large-scale application of graphene are solved; the method has a great significance in industrial production and application of graphene.

The invention relates to the technical field of high molecular materials, more specifically, and relates to BOPET film high concentration matt masterbatch and a preparation method thereof. The main points of the technical schemes are as follows: the masterbatch includes, by weight ratio, 50-80 parts of PET, 5-25 parts of silicon dioxide, 1-3 parts of a hyper-dispersant, 3-15 parts of matting resin, 0.1-1 part of an anti-oxidant, and 3-15 parts of silicone microspheres. The masterbatch prepared through the above components and ratio is high in effective concentration, obvious in the cooperativeeffects of several matting components, good in matting effect and low in glossiness of matt BOPET films; and the masterbatch is only applied to the surface layers of the BOPET films, so that the advantage of costs can be obvious.

The invention relates to the technical field of graphene composite material preparation, aims at the problems in the prior art that graphene in a graphene modified polyester composite material is poorin integrity and prone to agglomeration, and discloses a preparation method of a graphene modified polyester composite material based on liquid phase stripping. The preparation method comprises the following steps: taking a graphite derivative as a raw material, dispersing the graphite derivative in an organic solvent, adding a dispersing agent, and preparing a graphene dispersion liquid under the ultrasonic-assisted action; mixing the graphene dispersion liquid with a polyester monomer and a catalyst, and performing esterification reaction and condensation polymerization to obtain the graphene polyester nano composite material. According to the method, a liquid-phase stripped graphene modified polyester composite material is adopted, the agglomeration phenomenon of the graphene after liquid phase stripping is reduced, the stability and integrity of the graphene are improved, the physical and chemical properties of the graphene are relatively strong, the uniform dispersity of the graphene in the modified polyester composite material is further improved, and the finally obtained product graphene polyester fiber is durable in performance and high in washing resistance.

The invention provides a preparation method of manganese-zinc ferrite with a high magnetic conductivity. Fe2O3, ZnO and MnO which are used as raw materials undergo primary ball-milling and presintering to realize primary ferritization, and then undergo secondary ball-milling crushing and granulation to obtain manganese-zinc ferrite particles, and the particles are molded and sintered to obtain a manganese-zinc ferrite powder. The Fe2O3, ZnO and MnO are mixed in a ball mill, triethanolamine or triethanolamine sulfate is added, large particles are broken by utilizing the mechanical force of theball mill to form small particles, the triethanolamine or triethanolamine sulfate can be effectively adsorbed on the surfaces of the particles in an electrostatic manner as a dispersant, so secondaryagglomeration of the particles is prevented, thereby the particle size of the ball-milled particles is small, and the magnetic conductivity of the obtained manganese-zinc ferrite powder is high; and calcium lignosulphonate is decomposed into CaO in the subsequent sintering process, and is deposited at the grain boundary, so the resistivity of the product is improved, thereby the magnetic conductivity of the manganese-zinc ferrite powder is improved.

The invention relates to a method for preparing titanium-based polyester filaments by direct spinning of four-kettle melt. The preparation method comprises the following steps of preparing polyester melt by taking PTA, EG and a polyester titanium catalyst composite material system as raw materials and adopting a four-kettle polymerization process, and then performing melt direct spinning to prepare titanium-based polyester filaments; and adding the PTA, the EG and the polyester titanium catalyst composite material system into an esterification kettle 1 jointly, wherein the polyester titanium catalyst composite material system mainly comprises a polyester prepolymer with the polymerization degree of 5 -30 and a sheet-shaped titanium polyester catalyst dispersed in the polyester prepolymer.According to the method for preparing the polyester filaments by direct spinning of the four-kettle melt, the catalyst is wrapped with the polyester prepolymer with the polymerization degree of 5 -30,so that agglomeration is effectively avoided; the adopted catalyst has excellent hydrolysis resistance and can be added in any stage of esterification and pre-polycondensation; and the method for preparing the titanium-based polyester filaments by direct spinning of the four-kettle melt has the advantages of simple process, low cost and good application prospect.

The invention discloses a preparation method for a superhigh-fineness calcium carbonate composite powder. Simply, the preparation method comprises steps of cleaning of calcite raw ore, air drying, crushing, grading, mixing preparation, cladding, drying and modification. The beneficial effects comprise that the superhigh-fineness calcium carbonate composite powder has relatively high quality, the loading of calcium carbonate is improved, and secondary agglomeration of particles is avoided.

The invention relates to a preparation method of a universal titanium dioxide water slurry. The method includes: adding an organic dispersing agent, an inorganic dispersing agent and water into an inorganic coated titanium dioxide filter cake, performing pulping and dispersing, and then carrying out sanding treatment to prepare a titanium dioxide dispersed water slurry; and adding cellulose into the dispersed water slurry, and conducting high speed dispersing to obtain the universal titanium dioxide water slurry. The method has the advantages of simple process and convenient operation. The mixed use of a cellulose thickening agent in cooperation with the inorganic dispersing agent and the organic dispersing agent can reduce layered settlement due to the adsorption and aggregation among particles in the titanium dioxide water slurry and formation of large particles finally, thus preventing the viscosity rise or serious layering of the water slurry from generating hard precipitates, andensuring the performance and normal use of the titanium dioxide water slurry. The method not only can reduce dust flying and material wasting for customers, and save the energy consumption for grinding and dispersion, but also can give full play to dispersity, covering power, high whiteness and other application performance of titanium dioxide, and the prepared universal titanium dioxide water slurry can be applied to paint, papermaking and other water-based fields.

The invention discloses a sweat-absorbent polyester fiber pantyhose including a pantyhose body. The pantyhose body is formed by interlacing a lining yarn and a veil. The lining yarn is made of a blended viscose fiber and a moisture wicking polyester fiber, and the veil is spandex, in terms of weight percent, the composition of each fiber raw material of the pantyhose body is: 12 to 13% of spandex,8 to 9% of modified viscose fiber, and 78 to 80% of moisture-absorbing and perspiration polyester fiber. The sweat-absorbent polyester fiber pantyhose has better moisture absorption and perspirationperformance, and has washing resistance, antibacterial, anti-ultraviolet, anti-static and other functions.

The invention relates to a composite electrode material of natural modified spherical graphite (MSG)-loading nano-Cu6Sn5 and a fabrication method thereof. The main body of the electrode material is natural modified spherical graphite (MSG), and the particle surface of the main body material loads Cu6Sn5 alloy particles in the scale of nanometer. In the structure of the composite material, Cu6Sn5 nanoparticles are fixedly loaded on the surface of graphite, which buffers the volume expansion as well as ensures the conductivity in the process of recirculation, and the surface of graphite has Cu6Sn5 nanoparticles of high specific capacity, which enhances the capacity of entire electrode materials. By using the present composite material as negative materials of Li-ion batteries, the negative materials of Li-ion batteries can be obtained with high-capacity Li-storage, excellent security and good circulation.

The invention provides silicon-carbon negative electrode material slurry and a preparation method thereof. The method comprises steps of 1) dividing CMC glue solution into two parts, and mixing a first part of the CMC glue solution with conductive agent and a silicon carbon material to obtain slurry 1; 2) adding a graphite material into the slurry 1, and dispersing the material to obtain slurry 2;3) adding a second part of CMC glue solution and the water into the slurry 2, vacuumizing, and dispersing the material to obtain slurry 3; and 4) adding SBR binder into the slurry 3, dispersing, sieving the slurry, and discharging bubbles to obtain silicon-carbon negative electrode material slurry. The method is advantaged in that the agglomeration phenomenon of the silicon-carbon particles in the pulping process is eliminated, that the graphite material uniformly wraps the silicon-carbon particles is guaranteed, and the overall cycle life of a battery is improved.