39results about How to "Uniform and stable size" patented technology

The invention discloses a nano cellulose, and a preparation method thereof. The preparation method comprises following steps: a fiber raw material is smashed; lignin is removed with sodium chlorite; acidolysis of cellulose is carried out with phosphoric acid; an obtained material is subjected to centrifugation; and the nano cellulose is obtained via dialysis. The invention also provides the nano cellulose prepared via the preparation method. According to the preparation method, sodium chlorite is used for processing the fiber raw material; lignin is removed; acidolysis of cellulose with phosphoric acid is carried out; and the ideal nano cellulose is obtained. The preparation method is low in energy consumption; the obtained nano cellulose is convenient to disperse; size is uniform and stable; the preparation method is simple; residue acid can be washed with deionized water; and a problem of acid solution treatment is avoided.

The invention provides a method for preparing stable nano-silver. The method comprises the steps that micelle of amphiphilic chitosan and polycaprolactone crafted copolymer or a derivative of the amphiphilic chitosan and polycaprolactone crafted copolymer serves as a stabilizer, and the stable nano-silver is obtained. The method for preparing the stable nano-silver has the advantages that formed silver nanoparticles of a good three-dimensional area center structure are evenly distributed and are uniform and stable in size, and not any reducing agents or complex methods are used in the preparation method of the nano-silver, so that repeatability is good. Compared with other micelle type stabilizers, the preparation process of a raw material and micelle aqueous solution of the raw material are simple, the material itself is non-toxic, small in use amount and fast in preparation speed. Compared with other existing preparation technologies, the method is convenient to operate, simple in process and fast in preparation speed. In addition, equipment is conventional, and irradiation time is short.

The invention relates to an AC-DC lateral-light source light-emitting plate, comprising light guide plate and light source, where the back of the light guide plate is provided with reflecting film, and characterized in that: it also comprises a 'U'-shaped elastic insulating bar, where two sides of the lower part of the insulating bar is provided with salient edges on the inner wall, extending in the direction of the insulating bar; the light source comprises LEDs welded on a circuit board at certain intervals; the circuit board is inserted below the salient edges; the polished end surface of the light guide plate is inserted above the salient edges; the back of the light guide plate is provided with netlike refracting grooves formed by 3D laser carving, where the further the refracting groove is apart from the light source, the larger the groove diameter is and the larger the space is; the power supply input end of the light source is connected with a switching power supply. The invention can be widely applied to highways, city traffic marks, etc.

The invention provides environment-friendly paper and a preparation method thereof. The environment-friendly paper comprises the following components by weight percent: 65-85% of calcium carbonate fibers, 3-10% of thermoplastic starch, 10-20% of polyolefin resins and 2-5% of auxiliary components, wherein the calcium carbonate fibers are needle-like single-crystal fiber materials with average diameter of 0.5-1mu m and length diameter ratio being not less than 20 / 1; the thermoplastic starch is the micronized, plasticized and modified starch material; the polyolefin resins are polyethylene or polypropylene materials with melt index being 5-30; and the auxiliary components at least comprise surfactants with contents being not less than 1% and lubricants with contents being not less than 1%. The environment-friendly paper has the characteristics of low ration, little proportion and stable and uniform size, has good ink absorbency and printing adaptability, excellent performance indexes, such as whiteness, opacity, smoothness and tensile index and good texture and processability and can realize thermoplastic process. The environment-friendly paper accords with the present national development policy of the low carbon industry and has broad market prospect.

The invention provides a preparation method of CuInS2 alloy quantum points. The method comprises the following steps of preparing In2S3 quantum points; providing inorganic indium salt, elemental sulfur, organic amine or organic phosphorus; mixing the inorganic indium salt, the elemental sulfur, the organic amine or the organic phosphorus; performing stirring in insert atmosphere, and performing degassing treatment to form a mixed solution; heating the mixed solution to 80 to 150 DEG C in the insert atmosphere; continuously heating the materials to 180 to 250 DEG C; performing preparation to obtain the In2S3 quantum points; preparing CuInS2 alloy quantum points; dissolving the In2S3 quantum points into a non-polar solvent; performing stirring treatment in the insert atmosphere to obtain an In2S3 quantum point solution; dissolving copper ion precursors into thiol; performing stirring treatment in the insert atmosphere; obtaining a Cu-thiol ligand solution; injecting the Cu-thiol ligand solution into the In2S3 quantum point solution at uniform speed to perform cation exchange; performing purification treatment; obtaining the CuInS2 alloy quantum points.

The invention provides a kind of preparation method of mulberry-shaped barium polyacrylate powder doped with europium, the preparation method comprises the following steps: a, weigh Ba(NO 3 ) 2 Dissolved in water to give Ba(NO 3 ) 2 solution; b, in Ba(NO 3 ) 2 Eu(NO 3 ) 3 Solution and 50wt% polyacrylic acid aqueous solution, stir evenly to obtain a mixed solution; c, put the mixed solution in a reaction kettle, and conduct a hydrothermal reaction at a temperature of 120~140°C for 4~16h; d, filter after the hydrothermal reaction is completed , the resulting precipitate was washed and dried to obtain a mulberry-like europium-doped barium polyacrylate powder. The preparation method of the present invention uses hydrothermal reaction, the preparation method is simple, does not need high-temperature roasting, and is suitable for large-scale industrial production. By controlling the hydrothermal reaction temperature and other conditions, the mulberry-shaped barium polyacrylate powder is obtained. The product size is uniform and stable, the shape is controllable, and it has a large specific surface area and good photoluminescence performance.

The invention belongs to the technical field of water purification and particularly relates to a preparation method of nanocellulose, the nanocellulose, a water purifying membrane and a preparation method of the water purifying membrane. The preparation method of the nanocellulose comprises steps as follows: raw material pretreatment; preparation of alpha cellulose and preparation of nanocellulose. The nanocellulose is prepared with the preparation method. The water purifying membrane comprises the nanocellulose. The preparation method of the water purifying membrane comprises steps as follows: preparation of a lignin base layer, preparation of a polyether sulfone ultrafiltration layer and preparation of the water purifying membrane, wherein the raw material lignin of the lignin base layer is a product separated in the preparation method of the nanocellulose. The preparation method adopts mild conditions, pollution emission is avoided, and the finally prepared nanocellulose meets requirement for preparation of the water purifying membrane. Further, the content of the nanocellulose in the water purifying membrane obtained with the provided preparation method of the water purifying membrane is high, the service life is longer and the water purifying effect is better.

The invention belongs to the field of material technology, and discloses an egg yolk-eggshell structure precious metal@hollow carbon nanosphere composite material and its preparation method and application. The preparation method is: in the synthesis of noble metal @SiO 2 On the basis of core-shell nanospheres, the multi-core-shell structure noble metal @SiO was prepared by surface modification and emulsion polymerization. 2 @Polychloromethylstyrene composite nanospheres, followed by the self-crosslinking reaction of the methylene group of polychloromethylstyrene, under the condition of adding a crosslinking agent in disorder, it can be inside the shell A rich microporous network structure is built, benefiting from the rigid structure of the polychloromethylstyrene shell, after high-temperature carbonization and HF etching, the egg yolk-eggshell structure noble metal@hollow carbon nanosphere composite material is obtained. The invention can be used as high-activity p-nitrophenol reduction catalyst material, high-capacity lithium-sulfur battery limited sulfur nano-carbon carrier material, high-performance formaldehyde adsorption material and biological antibacterial material.

The invention provides a production technology for a hollow abnormal-shape electric anaerobic copper plate, comprising the following technologies of: upwards leading a continuous anaerobic copper strip blank, carrying out cold rolling, annealing, brushing in an acid washing way, carrying out primary cold-rolling forming (a cold rolling method), straightening, testing, and packing. Compared with the prior art, the production technology has the following advantages that 1) the production technology is high in production efficiency, and the cold rolling technology primarily and coldly rolls double rows of continuous electric convex hulls through a specific abnormal-shape hole pattern, so that the primary forming can be carried out; 2) the product is regular in appearance shape, the electric convex hulls which are primarily formed by the cold rolling method and the cross-section shapes are regular in shapes, and are stable and even in size, and the defect problem such as the 'bamboo joints' shape caused by the repeated press forming in the conventional technology can be avoided; 3) the production technology is short in technological process, is low in cost, and is directly and coldly rolled into stripe materials as required by upwards leading the continuously-cast anaerobic copper strip blank, the primary cold-rolling forming can be carried out after the thermal treatment, the higher-cost procedures such as the heating and the hot-rolling cogging can be eliminated, the technology can be optimized, and the production cost can be reduced; and 4) the product is good in product quality, and has the characteristics of being high in purity, low in oxygen content, high in electric conductivity, and good in surface quality.

The invention relates to a building paint stirring device, which comprises a filter chamber, a grinding chamber, a mixing discharge part, a stirring chamber, a first air piston part and a second air piston part. The paint with different particle sizes is classified through the filter chamber, and the large-grained paint is further ground by setting the grinding parts to achieve the uniform particle size of the paint and avoid the inhomogeneity of the paint. By setting up a stirring device with a specific structure and setting the air jet, the stirring process of the paint is more uniform and stable, thus achieving a high degree of stability and uniformity of the paint product.