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11905 results about "Sodium carboxymethylcellulose" patented technology

Carboxymethyl cellulose (CMC) or cellulose gum or tylose powder is a cellulose derivative with carboxymethyl groups (-CH2-COOH) bound to some of the hydroxyl groups of the glucopyranose monomers that make up the cellulose backbone. It is often used as its sodium salt, sodium carboxymethyl cellulose.

Large-capacity high power polymer ferric lithium phosphate power cell and preparation method thereof

The invention discloses a large-capacity high-power polymer lithium iron phosphate power battery. The weight ratio of anode slurry is as follows: 81 to 85 percent of lithium iron phosphate, 1 to 5.5 percent of superconduction carbon, 0 to 2.5 percent of conductive carbon soot, 0 to 4 percent of conductive black lead, 0 to 2.5 percent of crystalline flake graphite, 0 to 2 percent of carbon nanometer tube as well as 6 to 7.5 percent of polyvinylidene fluoride; the weight ratio of cathode slurry is as follows: 89 to 91 percent of cathode material, 1 to 3.5 percent of superconduction carbon, 0 to 2 percent of conductive carbon soot, 0 to 4 percent of conductive black lead, 2.5 to 3.5 percent of styrene-butadiene rubber as well as 1.5 to 2 percent of sodium carboxymethyl cellulose; the steps for preparing the battery are as follows: preparing slurry, coating the anode and the cathode, rolling and pressing a polar plate, transversely and separately cutting the polar plate, baking the polar plate, welding the polar ears of the anode and the cathode, preparing a battery cell, putting the electric core into a shell and sealing, baking the electric core, injecting liquid into the battery as well as forming the battery and dividing the volume of the battery. The invention relates to a lithium-ion secondary battery which can provide drive energies for electric tools, electric bicycles, motor cars and electric vehicles.
Owner:MCNAIR TECH

Inorganic hydrated salt expanded graphite composite phase-changing heat storage material and preparation method thereof

The invention relates to an inorganic hydrated salt expanded graphite composite phase-changing heat storage material. In the preparation method thereof, 85-89 mass parts of inorganic hydrated salt sodium acetate trihydrate as a heat storage matrix, 5.5-6.5 mass parts of disodium hydrogenphosphate as a nucleating agent, 2.5-3.5 mass parts of carboxymethyl cellulose as a thickening agent, and 3-4.5 mass parts of expanded graphite is blended in an inorganic hydrated salt mixture as a material with a high thermal conductivity. Due to the use of the expanded graphite, the material not only maintains excellent properties of natural flake graphite such as good thermal conductivity, no toxicity and the like, but also has adsorbability which the natural flake graphite does not have. The invention solves the problems of sub-cooling degree, phase stratification and low thermal conductivity during the heat storage process. The composite phase-changing material has a low sub-cooling degree after the phase changing performance is improved, the solution thereof is uniform without sedimentation and stratification during the solid-liquid phase change, the performance is stable, the repeatability of good, and the phase-changing heat storage can be enhanced through improving the thermal conductivity of the material.
Owner:ENG COLLEGE OF ENG CORPS PLA UNIV OF SCI & TECH

Preparation method of negative electrode slurry capable of reducing expansion of lithium ion battery

The invention discloses a preparation method of negative electrode slurry capable of reducing the expansion of a lithium ion battery. The preparation method comprises the following steps of: carrying out dry blending on a negative electrode active substance and a conducting agent in advance; dissolving sodium carboxymethyl cellulose into de-ionized water to obtain a CMC (Carboxyl Methyl Cellulose) gel solution with the concentration of 1.0%-2.0%; adding one part of the CMC gel solution into a mixture of the negative electrode active substance and the conducting agent and stirring at a high speed for 0.5-1h; adding the balance of CMC gel solution and stirring at a high speed for 1-3h; adding a modified SBR (Styrene Butadiene Rubber) binding agent and stirring at a middle speed for 0.3-1h; and adjusting the viscosity. By adopting the method of carrying out the dry blending on artificial graphite and the conducting agent in advance, adding the glue solution by two times and utilizing modified SBR as the binding agent, a bridge phenomenon of the artificial graphite is reduced, a pole piece structure is changed, the binding force between grains is improved and the expansion of a negative electrode is reduced; meanwhile, the slurry sedimentation of the artificial graphite is inhibited. The preparation method of the negative electrode slurry capable of reducing the expansion of the lithium ion battery has important meanings on ternary lithium ion batteries and improvement of machinability, capacity and safety of high-capacity power batteries.
Owner:南京国轩新能源有限公司

Nano silver colloid aqueous solution preparation method using sodium cellulose glycolate

The invention discloses a method for preparing a nanometer silver colloid aqueous solution by adopting sodium carboxymethyl cellulose. The method comprises the following steps: a silver nitrate solid is dissolved in deionized water so as to prepare a silver nitrate aqueous solution A; sodium carboxymethyl cellulose is dissolved in deionized water so as to prepare a solution B; the solution A and the solution B are mixed, wherein the concentration of silver nitrate is 5*10<-5>-2.5*10<-2> mol/l, and the concentration of the sodium carboxymethyl cellulose is 0.2 to 25 g/l; the pH value of the solutions is controlled between 7 and 11; and the solutions react for 2 to 20 hours at a temperature between 15 and 90 DEG C, so as to obtain the aqueous solution containing silver colloid particles with the average particle size less than 100 nanometers. The nanometer silver colloid aqueous solution obtained by the method is brownish-grey at high concentration and is transparent bright yellow after dilution. The prepared nanometer silver colloid particles are stable in shape, good in dispersibility, adjustable and controllable in particle size distribution. The method has the advantages that the method adopts a common reaction vessel for reaction, and is simple in process, little in equipment investment and easy to implement, and raw materials involved in the reaction are friendly to environment, free from pollution, few in product impurities and convenient for post-treatment.
Owner:TIANJIN UNIV

Sterile polymerized covering dressing for wound surface

The invention provides a sterile polymerized covering for a wound surface-medical wet dressing for a burn wound, a preparation method of the dressing, and application. The dressing comprises the following components: 10 to 30g of chitosan, 30 to 80g of polyving akohol, 5 to 10g of alginate, 5 to 15g of isomaltose hypgather, 2 to 6g of carbomer 940, 2 to 5g of gelatin, 5 to 10g of sodium carboxymethylcellulose, 10 to 30g of glycerol, and 0.01 to 0.2g of menthol; 15 to 60g of condensed tannin which is remarkable in treatment can be selectively added; and a skin penetration enhancer or an appearance conditioning agent also can be selectively added. The dressing can be prepared into an irregular dressing in order to be suitable for the wound surfaces in irregular and special positions and also can be prepared into a solid plate-shaped dressing which can be shorn at random. According to the sterile polymerized covering dressing for the wound surface, the freezing and thawing technology and the irradiating technology are combined and cross-linked to realize the preparation, and the defects of the prior art can be overcome. The dressing is high in biocompatibility, free from toxicity and sensitization and high in mechanical strength and comfort level, is out of adhering during the process of being replaced after being attached for a long time, and is a nonantigenic protective barrier which has the effect of resisting and inhibiting bacteria.
Owner:JIANGSU HUAYI CELL & TISSUE ENG CO LTD

Preparation method and applications of ferrous sulfide/biological carbon composite material

The present invention discloses an efficient ferrous sulfide / biological carbon composite material and a preparation method thereof, and applications of the ferrous sulfide / biological carbon composite material in repair of heavy metal pollution water bodies. According to the present invention, biological carbon is adopted as a carrier, a ferrous sulfate solution and the biological carbon are mixed, sodium carboxymethyl cellulose is added as a stabilizer and a dispersant, a sodium sulfide solution is added to the system in a dropwise manner under the nitrogen protection, and vigorous stirring is performed to make the generated ferrous sulfide nanoparticles uniformly grow on the surface of the biological carbon, such that the disadvantage that the ferrous sulfide nanoparticles are easily agglomerated is substantially improved so as to increase the effective contact area between the ferrous sulfide nanoparticles and the pollutant, and the adsorption ability and the oxidation reduction ability of the ferrous sulfide and the biological carbon are integrally combined so as to improve the pollutant removal ability; the preparation method has advantages of simple and rapid process, low production cost, environmental protection and no secondary pollution; and the efficient ferrous sulfide / biological carbon composite material can strongly repair the Cr(VI) polluted water body, can effectively reduce the biological toxicity of the Cr(VI) on wheat seeds, and has wide application prospects in the fields of repair of organic pollution and inorganic pollution in environments.
Owner:NANKAI UNIV

High capacity lithium iron phosphate power cell and production technique thereof

The invention relates to a high-capacity iron phosphate lithium power battery, which is characterized in that the anode material uses the iron phosphate lithium; an anode current collector uses the aluminum foil; a conductive agent uses the superconducting carbon black and the conductive graphite; the anode material binder uses the polyvinylidene fluorine; the cathode material uses the natural graphite or the artificial graphite; the cathode current collector uses copper foil; the conductive agent uses the superconducting carbon black and the conductive graphite; and the cathode material binder uses the polyvinylidene fluorine or the sodium carboxymethylcellulose and the styrene butadiene rubber. The invention also discloses a processing technology of the high capacity iron phosphate lithium power battery, comprising the following step: matching ingredients, coating, baking, rolling, processing slice, baking, staking, assembling upper cover , baking, liquid injection, formation and partial volume. The invention adopts a stacking type, and has simple processing technology, compact battery structure and stable performance; thus, the battery capacity is greatly improved. The invention has an advantage of providing the lithium ion secondary battery of a driving energy source to the small and medium sized electric tools, such as the household electric appliance, the electric bicycle, the electric motorcycle and the electric automobile.
Owner:山东海霸电池有限公司
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