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2556 results about "Sodium polyacrylate" patented technology

Sodium polyacrylate, also known as waterlock, is a sodium salt of polyacrylic acid with the chemical formula [−CH₂−CH(CO₂Na)−]ₙ and broad application in consumer products. This superabsorbent polymer has the ability to absorb 100 to 1000 times its mass in water. Sodium polyacrylate is an anionic polyelectrolyte with negatively charged carboxylic groups in the main chain. While sodium neutralized polyacrylic acids are the most common form used in industry, there are also other salts available including potassium, lithium and ammonium.

Preparation method for coating anode material of lithium battery

The invention provides a preparation method for a coating anode material of a lithium battery. The preparation method comprises the following specific steps: (1) weighing a coating material and monomer sulfur; weighing the coating material and the monomer sulfur according to a mass ratio, wherein the mass ratio of the coating material to the monomer sulfur ranges from 1:1 to 1:100; (2) preparing a dispersion solution of the sulfur: dissolving the monomer sulfur into a sodium polyacrylate water solution with the mass percentage of 2%-10% at a room temperature to obtain the dispersion solution of the sulfur; (3) preparing a dispersion solution of the coating material: dissolving the coating material into a surfactant water solution at 20-45 DEG C to obtain the dispersion solution of the coating material; and (4) preparing the coating anode material of the lithium battery. According to the preparation method for the coating anode material of the lithium battery, self discharge of the battery is reduced effectively and the stability of the structure in a charging/discharging process of a sulfur electrode is kept; a sulfur active material prepared by the preparation method is used as a lithium-sulfur secondary battery anode material and the prepared lithium material has a high specific discharge capacity and a good circulating performance.

Preparation process of wet-process superfine modified calcium carbonate

The invention discloses a preparation process of wet-process superfine modified calcium carbonate. The preparation process comprises the following steps: performing cleaning and screening, rough crushing, fine crushing, dry grinding and grading on calcite ores; collecting fine powder of 600 meshes and preparing slurry with water in such a manner that the solid content is 70%-80%; adding a modifier sodium stearate to the slurry for modification treatment and then performing wet grinding, and adding a grinding medium zirconium oxide microspheres and a dispersant sodium polyacrylate during grinding, wherein the volume ratio of the grinding medium to the slurry is 1: 1.5, and the dosage of the modifier is 0.6%-1.2% of the solid content; and putting the slurry obtained after the wet grinding through a vibrating screen, collecting the obtained wet-process superfine modified calcium carbonate slurry into a slurry barrel for flashing drying, collecting the finished product and packaging. The new preparation process is adopted; the wet grinding-modifying integrated technique and the flashing drying technique are adopted so that the production efficiency is high and the production cost is low; the product has the advantages of small particle size, low oil absorption value, high activity and the like; and the major product quality indices are at the international leading level.

Fruit fresh-keeping paperboard and preparation method thereof

The invention provides a fruit fresh-keeping paperboard and a preparation method thereof. The fruit fresh-keeping paperboard consists of paperboard base paper and fresh-keeping coat which is spread on the surface of the paperboard base paper. The paperboard base paper is mainly made from the waste paper, and the base weight is 90 to 100 g/m2. The fresh-keeping coat mainly comprises the following components in part by weight: 1 part of cristobalite, 0.25 to 1.5 parts of kaolin, 0.005 to 0.01 part of sodium polyacrylate, 0.0003 to 0.0005 part of nisin, 0.0001 to 0.0003 part of natamycin, 0.2 to 0.5 part of oxidized starch and 1.0 to 2.0 parts of water, and the base weight is 5 to 30 g/m2. The waste paper is made into the paperboard base paper through, disintegration, high-consistency slag removal, defibering, low-consistency slag emoval and screening, the cristobalite, kaolin, the sodium polyacrylate, the nisin, the natamycin and water are added into a high-speed dispersion machine to be made into pigment dispersion liquid after being adequately dispersed and filtered, and the oxidized starch and the water are heated to be dissolved to obtain the oxidized starch liquid. The pigment dispersion liquid is mixed with the oxidized starch liquid to obtain the fresh-keeping paint liquid, after being filtered by 180 to 200-mesh sieve, the fresh-keeping paint liquid is spread onto the surface of the paperboard base paper through a spreading machine, and the paperboard base paper with the surface being coated with the fresh-keeping paint is secondarily dried, press finished and decorated to obtain the finished product. The fruit fresh-keeping paperboard has the advantages that the fresh-keeping effect is good, the environment compatibility is good, the fresh-keeping package and the storage and transportation package are integrated, and the continuous mass production can be realized on the papermaking machine.

Preparation method of aragonite crystal form calcium carbonate

The invention relates to a preparation method of aragonite crystal form calcium carbonate, comprising the following steps: lime is sent into a digestion equipment and added with water for digestion treatment, water and quick lime are added slowly according to the ratio of 3:1 to 5:1, calcium hydroxide emulsion is obtained by filtrating, the calcium hydroxide emulsion is sent into a carbonization equipment, magnesium hydroxide needle crystal is added as a seed crystal, CO2 is injected in the materials which are mixed at the same time, aragonite crystal form light calcium carbonate is obtained by carbonization reaction; the light calcium carbonate screened pulp is sent into a filtration device for dehydrating and calcium carbonate filter cake is obtained; the sodium polyacrylate is added as a dispersant and light calcium carbonate with particle size distribution of 1-2 mum is obtained after grinding, thus obtaining a dispersion liquid product which reachs 70% of solid content or the liquid product is sent into a drying device for drying to obtain light calcium carbonate dry powder. The preparation method enjoys cheap price, simple preparation process and perfect performance, thus being applicable to the industrialized production. The obtained aragonite crystal form calcium carbonate is suitable to be a papermaking coating.

Temporary plugging agent for staged fracturing of horizontal well and preparation method thereof

ActiveCN102199420ALow differential pressureDrilling compositionSodium bicarbonateCross-link
The invention relates to a temporary plugging agent for the staged fracturing of a horizontal well and a preparation method thereof. The temporary plugging agent consists of the following components of guar gum, aluminum oxide, magnesium oxide, an ammonium persulfate microcapsule gel breaker, sodium polyacrylate spherule and sodium bicarbonate according to a mass ratio of 48:107:193:(11-42):24:1.26. The preparation method comprises the following steps of: mixing the guar gum, the aluminum oxide, the magnesium oxide, the ammonium persulfate microcapsule gel breaker, the sodium polyacrylate spherule and the sodium bicarbonate which serve as raw materials uniformly at room temperature according to the ratio, adding the mixture into water slowly with stirring, and stirring for 5 minutes to obtain the temporary plugging agent for the staged fracturing of the horizontal well. The temporary plugging agent is subjected to a cross-linking reaction at the well temperature of between 60 and 80 DEG C to form a rubber plug with a certain strength, the strength of tolerant differential pressure exceeds 30 MPa, and after fracturing construction is performed, the ammonium persulfate microcapsule gel breaker dissolves out and breaks a cross-linking structure of a guar gum cross-linking system.

Green and environment-friendly soil stabilizer taking industrial waste as raw material and application method thereof

The invention discloses a green and environment-friendly soil stabilizer taking industrial waste as raw material and an application method thereof, which overcomes the problem of the prior art that lime or cement is taken as the main component of hardening agent, and the lime or cement is hardened to form a fully dense structure, plants can not grow in the structure, so the road greening can not be realized, and other problems. The soil stabilizer of the invention takes the industrial waste as raw material, the industrial waste is evenly mixed with pre-gelatinized starch and sodium polyacrylate, the industrial waste can be of one or the combination of more kinds of coal ash, blast furnace slag or silica micropowder and is used for solidifying soil and preventing water loss and soil erosion; the application method is as follows: the soil stabilizer, plant seed, soil and water are stirred into complex soil, and then the complex soil is coated on the construction surface, the complex soil can be solidified in short time, and usually can not generate water loss and soil erosion under the rainfall condition. The soil stabilizer of the invention has good water permeability, air permeability, water-retaining capacity and nutrient preserving capability, has neutral PH value and facilitates the sprouting and growing of plants.

High-temperature protective coating for high-carbon steel billet and application thereof

InactiveCN104177873AHigh temperature adhesionImproved thermal shock stabilityCoatingsBrickAdhesive
The invention discloses a high-temperature protective coating for a high-carbon steel billet. The coating comprises a dry powder material and an adhesive. The dry powder material is prepared from the following components in parts by weight: 30-50 parts of corundum carbon-free waste brick materials, 10-12 parts of electro-fused mullite, 25-30 parts of fused alumina zirconia waste brick materials, 8-10 parts of silicon carbide, 3-6 parts of soft clay, 3-6 parts of kyanite and 2-4 parts of sodium polyacrylate. The adhesive is prepared from a solid compound adhesive and a liquid compound adhesive. The dosage of the solid compound adhesive is 3-6% of the total weight of the dry powder material and the dosage of the liquid compound adhesive is 2-4% of the total weight of the dry powder material. The protective coating can be used for directly spraying the hot state billet with the surface temperature of 400-1100 DEG C, and not only has the double functions of preventing oxidization and resisting decarburization, but also has the self-repairing ability, so that the loss of iron scale and the thickness of a decarburized layer in the heating process of the high-carbon steel billet are remarkably reduced, the surface quality of the billet is improved. The production efficiency of a rolling mill is improved, and the production cost is lowered.

Antibacterial ES composite short fiber used for surface layer of hot-air non-woven fabric and preparation method of fiber

The invention discloses an antibacterial ES composite short fiber used for a surface layer of a hot-air non-woven fabric. The ES composite short fiber has a skin-core structure, that is, the fiber iscomposed of a core layer and a skin layer; the core layer is prepared from, by weight, 90-97 parts of polypropylene and 2-5 parts of an ethylene-propylene copolymer; the skin layer is prepared from, by weight, 85-95 parts of polyethylene, 5-7.5 parts of methyl methacrylate graft modification polyethylene, 3-6 parts of an ethylene-propylene copolymer and 6-9 parts of a composite antibacterial agent; the composite antibacterial agent is prepared from, by weight, 70-85 parts of chitosan-grafted sodium polyacrylate super absorbent resin, 70-85 parts of a crylic acid-2-acrylamide-2-methyl propanesulfonic acid copolymer, 25-37 parts of silver nitrate and 5-9 parts of nanometer silver. The antibacterial ES composite short fiber used for the surface layer of the hot-air non-woven fabric is high inantibacterial efficiency and has a lasting antibacterial effect, and the prepared surface layer of the hot-air non-woven fabric is good in softness and texture, high in longitudinal and transverse strength and durable.
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