32results about How to "Preserve intrinsic properties" patented technology

The invention discloses a limonite purple-clay product, which consists of the following raw materials in percentage by weight: 30 to 50 percent of limonite, and 50 to 70 percent of purple-clay mud. The preparation method comprises the following steps: grinding the limonite and the purple clay mud into powder of between 80 and 120 meshes; mixing according to a proportion, adding water and stirringto prepare unfired pottery; sealing and packaging the unfired pottery, and aging for 10 to 15 days; preparing a blank of the required product, and drying in the shade indoors for 2 to 3 days; grinding and polishing the shady dried blank to prepare a semi-finished product; and firing the prepared semi-finished product in a kiln for 15 to 20 hours at the temperature of between 1,120 and 1,180 DEG C, and cooling to prepare the required product. In the invention, the limonite resource is sufficiently utilized, and waste is turned into wealth; and the fired limonite purple-clay product has light weight, high strength and no toxicity or radiation, the original characteristic and separated trace elements of the limonite have no changes, and the advantages of good ventilation and plasticity of the purple-clay are combined. The limonite purple-clay product can be manufactured into various nice new material tea sets, mugs and other products.

The invention provides an activation method of a high-capacity lithium ion battery negative electrode material. The activation method comprises the following steps of 1) performing film formation on agraphene oxide aqueous solution in a porous template by a drop-coating method, and allowing to stand; 2) spraying the graphene oxide aqueous solution onto the dried three-dimensional graphene oxide / template attachment material, and drying for use; 3) impregnating the material in an aqueous solution dissolved with an activation agent, and allowing to stand after ultrasonic processing; and 4) placing the product in a tubular furnace for oxygen-free sintering after drying, cooling the sintered product to a room temperature, washing the product with deionized water until washing water is neutral,and drying, thereby obtaining the activated graphene / template negative electrode material. By the activation method, the inherent characteristic of a two-dimensional graphene sheet is maintained, meanwhile, graphene and the porous template are more uniformly distributed, the active sites of graphene phase-template phase-electrolyte phase catalytic reaction are remarkably improved, and the power density and the cycle rate performance are remarkably improved.

The invention relates to an old style forming method of Jinshan stone with a decoration effect, and relates to the technical field of building materials. According to the invention, a key technology of accelerating color penetration and strengthening color attachment is adopted, specifically, the method comprises the following steps of: brewing 100g of tea leaves by using 1L of boiled water, cooling to the room temperature, filtering by using gauze to obtain tea water for spare use; placing 5g of potassium permanganate in 25L of tap water, and uniformly stirring, thus obtaining a solution for accelerating color permeation for spare use; adding 250ML of poly ethyl acetate emulsion adhesive into the solution for accelerating color permeation, and uniformly stirring, thus obtaining a solution for accelerating color permeation and strengthening color attachment for spare use; adding the tea water into the solution for accelerating color permeation and strengthening color attachment, uniformly stirring, and placing for one hour, thus obtaining the old style forming liquid for spare use; painting the old style forming liquid on the surface of Jinshan stone by using a soft fur brush, cooling, and preparing an old-style Jinshan stone product. The Jinshan stone old style forming method is used for old forming decoration treatment on Jinshan stone, is simple, ingenious and practical, ensures that the product is plain and elegant, and ensures that the decoration effect is good.

The invention relates to the field of graphene-based foam composites, in particular to a light flexible graphene / polymer foam electromagnetic shielding material, and a preparation method and an application thereof. The preparation method comprises the steps that three-dimensional full-communicated metal foam grown with graphene and a high molecular polymer precursor are adopted; a graphene / metal foam complex is mixed with the high molecular polymer precursor to ensure that the surface of the graphene / metal foam complex is coated with a layer of high molecular polymer precursor; the high molecular polymer precursor in a mixture is cured and then dissolved to remove a porous metal base; and then the light flexible graphene / polymer foam electromagnetic shielding material is obtained. The graphene / polymer foam composite has very low density and good flexibility, and graphene in the graphene / polymer foam composite forms a full-communicated network in a seamless connection manner, so that the composite has excellent conductivity and electromagnetic shielding property, and can be widely applied to the fields of aerospaces, portable electronic devices and the like.

The invention specifically relates to a preparation method for a flexible vertically-aligned carbon nanotube array covered with thin-layer carbon, belonging to the field of preparation of flexible vertically-aligned carbon nanotube arrays. The preparation method comprises the following steps: depositing a thin layer of carbon on the surface of a substrate through plasma deposition; then growing carbon nanotubes by using a plasma-enhanced chemical vapor deposition method so as to obtain a composite structure of a vertically-aligned carbon nanotube array covered with the thin-layer carbon, wherein the thin-layer carbon located at the top allows the carbon nanotubes in the vertically-aligned array to be interconnected so as to guarantee that all the carbon nanotubes in the array participate in heat transfer; simply pressing the vertically-aligned array and peeling the vertically-aligned array from the substrate so as to obtain the self-supported flexible vertically-aligned carbon nanotubearray. The prepared self-supported flexible vertically-aligned carbon nanotube array has excellent thermal conductivity, good bendability and strong adhesion, and has good application prospects in the fields of flexible thermal interface materials and flexible energy storage materials.

The invention relates to the graphene composite material field, and particularly to a graphene foam / polymer high-conductivity composite material, a preparation method and applications thereof. Steps of the method comprises as follows: providing a fully communicated three-dimension grapheme foam network and a precursor solution of a high-molecular polymer; mixing the graphene foam with the precursor solution of the high-molecular polymer to form a graphene foam / high-molecule polymer precursor mixture; and solidifying the precursor of the high-molecular polymer in the mixture to form a high-conductivity graphene foam composite material. The invention adopts the three-dimension graphene foam to form a fully- communicated graphite rapid transmission network by a seamless connection, which enables the graphene foam composite material to possess great conductivity and mechanical property and can be widely applied to the conductive composite materials and elasticity conductor field.

The invention provides a reduction furnace bell inner wall spraying device, a spraying method and a reduction furnace, and relates to the technical field of polysilicon equipment. The spraying device includes a bell jar, a rotating part, a sealing part, a vacuum pumping part, an exhaust part and a cold gas power spraying part, and after the sealing part is used to form a closed space inside the bell jar, the vacuum pumping part, the cold gas power spraying part and the The exhaust part makes the inside of the bell jar under the high-temperature protective gas atmosphere, and then uses the cold gas power spraying part to spray powder on the inner wall of the bell jar to form a coating on the inner wall of the bell jar, wherein the inside of the bell jar is kept under high temperature protection before spraying In the atmosphere of inert gas, the oxidation of the coating can be avoided during the spraying process, and the intrinsic properties of the coating material can be preserved to the greatest extent. Coating with high bond strength. The invention also provides a method for spraying the inner wall of the bell jar of the reduction furnace.

The invention relates to a preparation method of a graphene / styrene-butadiene rubber composite with a functional characteristic and aims at compounding directionally-arranged graphene nanosheets intostyrene-butadiene rubber so as to provide excellent conductivity, wear resistance and the like. The material provided by the invention is of a double-layer structure, one layer is a functional layer mainly formed by directional arrangement of the graphene nanosheets, and the other layer is an elastic insulation layer mainly made of the styrene-butadiene rubber. The preparation method comprises thesteps: (1) carrying out ultrasonic treatment on the graphene nanosheets in a polyvinylpyrrolidone (PVP) solution to obtain a graphene dispersion solution; (2) adding the graphene dispersion solutioninto styrene-butadiene latex to carry out ultrasonic treatment or mechanical stirring; and (3) pouring the mixed solution obtained in the step (2) into a die, and carrying out solidification at a certain temperature to obtain a final composite. The composite is low in graphene nanosheet addition amount, excellent in conductivity and wear resistance in a direction parallel to the directional arrangement direction of the graphene nanosheets, good in insulation property in a direction vertical to the arrangement direction of the graphene nanosheets, soft and foldable and can be used in the fieldsuch as electrostatic protection and electromagnetic wave shielding.

The invention relates to a method for dyeing wool quickly at low temperature. The method comprises the following steps of: preparing a levelling agent, preparing a dye solution and dyeing the wool at the low temperature, wherein 1) the levelling agent is prepared from the following raw materials in part by weight: 15 to 25 parts of sodium acetate, 25 to 35 parts of aromatic polyether sodium benzene sulfonate, 5 to 15 parts of sodium hydrogensulfite, 15 to 25 parts of n-amyl alcohol and 1,000 parts of water, and a method for preparing the levelling agent comprises the following steps of: weighing the sodium acetate in the ratio, adding the sodium acetate into the water, dissolving and stirring uniformly; and regulating the pH value to reach 4.5 by using glacial acetic acid, adding the aromatic polyether sodium benzene sulfonate, the sodium hydrogensulfite and the n-amyl alcohol, and stirring the mixture in a constant temperature oscillator uniformly for 30 minutes for later use; and 2)the dye solution is prepared from the following raw materials in part by weight: 2 to 8 parts of dye, 1 to 5 parts of levelling agent and 1,000 parts of water, and a method for preparing the dye solution comprises the following steps of: adding the dye and the levelling agent into the water in the ratio, stirring uniformly, and regulating the pH value to be between 4.5 and 5 by using glacial acetic acid for later use.

The invention provides a preparation method of collagen regenerated cellulose fiber. The preparation method comprises the following steps: preparing viscose spinning dope; adding collagen solution into the viscose spinning dope, wherein the adding quantity of the collagen accounts for 4-15% of the mass of the methylcellulose of the viscose spinning dope; evenly mixing to obtain protein viscose mixed liquid; adding an initiator into the mixed liquid, wherein the adding quantity of the initiator accounts for 2.3-5% of the mass of the collagen; after that, stirring at the temperature of 19-25 DEG C for 2-8h to obtain spinning solution; filtering and defoaming the spinning solution, and then carrying out wet spinning. After the preparation method is adopted, the collagen is successfully grafted into the regenerated cellulose fiber, and the collagen regenerated cellulose fiber can be spun; the grafting efficiency and the grafting rate of the method are high; the obtained collagen fiber has silk-like gloss and is fluffy and soft in hand feeling.

The invention is a mechanical stripping method of functionalized boron nitride nanosheets. The method adopts boric acid and commercial hexagonal boron nitride as raw materials, and synthesizes them through the following three steps: taking boric acid and commercial hexagonal boron nitride in a mortar After uniform mixing, high-temperature pretreatment is carried out, so that the commercial block hexagonal boron nitride is corroded by dehydration boric acid and fixed by boron oxygen, and a uniformly reacted solid mixture is obtained; the solid mixture obtained after the reaction is roughly ground and placed in a ball mill tank In the process, mechanical ball milling is carried out; the white powder obtained after ball milling is dissolved and dispersed in deionized water, and washed repeatedly to ensure that the free boric acid is completely washed away, and the functionalized boron nitride nanosheet dispersion product is obtained; or The product obtained by centrifugal washing is dried to obtain a functionalized boron nitride nanosheet powder product. The method is simple to operate, does not require harsh experimental conditions, boric acid and deionized water can be recycled, and the obtained product has high crystallinity and functionalization degree.