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

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 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.