1113 results about "Aqueous medium" patented technology

A production method for an aqueous dispersion according to the present invention comprises polymerizing a first monomer that includes tetrafluoroethylene in the presence of a compound represented by formula (X) and a polymerization initiator under conditions in which an aqueous medium is present but an emulsifier that includes fluorine atoms is substantially absent to produce an aqueous dispersion that includes particles of a first fluorine-containing polymer that has an average particle diameter of no more than 500 nm and does not have a melting point.　Formula (X): C(X1)(X2)=C(X3)-L-Z. In formula (X), X1, X2, and X3 are each independently a hydrogen atom, a fluorine atom, a perfluoromethyl group, or an alkyl group, L is a single bond or a divalent linking group, and Z is an anionic group or a salt of an anionic group.

A fluoroelastomer production method including a step in which monomers A comprising a compound represented by CX1X2=CX3-L-Z, a cyano-group-containing monomer, and at least one compound selected from the group consisting of tetrafluoroethylene, fluorine-containing vinyl ethers, and fluorine-containing allyl ethers are polymerized in an aqueous medium under conditions that substantially no fluorine-atom-containing emulsifier is present.

An inkjet ink contains a quinacridone pigment, a pigment dispersion resin, and an aqueous medium. The pigment dispersion resin includes an adsorption resin adsorbed to the quinacridone pigment and a non-adsorption resin not adsorbed to the quinacridone pigment. The non-adsorption resin has a percentage content in the pigment dispersion resin of at least 20% by mass and no greater than 50% by mass. A supernatant obtained by centrifugation of the inkjet ink at 1,050,000 G for 3 hours has a phosphorous concentration of at least 1.0 ppm and no greater than 6.0 ppm. The supernatant has a sulfur concentration of at least 1.0 ppm and no greater than 6.0 ppm.

The present disclosure relates to supported metal catalysts, such as biochar-supported atomically dispersed metal catalysts, and methods of using supported metal catalysts to remove contaminants, such as antibiotics and per- and polyfluoroalkyl substances (PFAS), from aqueous medium.

Adhesive compositions including a multivalent metal salt, an multidentate acidic organic compound, and an aqueous medium are disclosed. The multivalent metal salt and multidentate acidic organic compound can include, as a mixture, a carbonate salt and / or carbonic acid. The aqueous medium can include pH adjusting agent such as sodium hydroxide. The adhesive composition, upon curing, can have a porosity of 10-50%. The adhesive composition, upon curing, can include a plurality of pores. The adhesive composition can be porous, and upon curing can have a plurality of pores having a pore size of between 20 μm to 200 μm. Methods of producing the adhesive composition are disclosed. Methods of using the adhesive composition are further disclosed.

The invention discloses a synthesis method of bromo-triazine, which belongs to the technical field of organic synthesis, and comprises the following steps: preparing an alumina-loaded N, N-dimethylaminopyridine catalyst, filling the alumina-loaded N, N-dimethylaminopyridine catalyst in a fixed bed reactor, introducing tribromophenol and metal oxide mixed slurry and cyanuric chloride slurry, carrying out a reaction for 2-4 hours, and carrying out a reaction for 2-4 hours to obtain the bromo-triazine. Raising the temperature for reaction to obtain a crude product solution; and performing post-treatment to obtain a bromo-triazine product. According to the invention, the aluminum oxide loaded N, N-dimethylaminopyridine catalyst is synthesized, and the N, N-dimethylaminopyridine enables the reaction speed to be higher and the yield to be higher; nano aluminum oxide is adopted for loading, so that on one hand, dealkalization synthesis of bromotriazine is realized, and on the other hand, the reaction efficiency is accelerated; the continuous process realizes non-aqueous medium and low-temperature short-time reaction, so that hydrolysis is further avoided; the aluminum oxide loaded N, N-dimethylaminopyridine catalyst is high in activity and stability, the synthesis method is simplified, and the aluminum oxide loaded N, N-dimethylaminopyridine catalyst is suitable for industrial large-scale production.

The present invention discloses a preparation method of yellow azoxy and azo stilbene dyes. Using 4-nitrotoluene-2-sulfonic acid as a raw material and water as a reaction solvent, in the presence of choline hydroxide, dye yellow 11 is obtained through a condensation reaction. The molecular structure of choline hydroxide contains a quaternary ammonium salt group and a hydroxyl group. The hydroxyl group provides additional hydrophilicity, which helps to improve the solubility and dispersibility of the dye in an aqueous medium and enhance the affinity between the dye and the fiber. Choline hydroxide can effectively provide the alkaline environment required for the reaction, promote the synthesis reaction of the dye, and better control the selectivity and yield of the reaction. Since the choline hydroxide molecule contains a hydroxyl group, it can form hydrogen bonds with the sulfonic acid groups in the dye molecule, enhance the stability between dye molecules, and improve the light fastness and acid and alkali resistance of the dye. Using choline hydroxide not only optimizes the reaction conditions, improves the purity and yield of the dye, but also significantly improves the performance of dye yellow 11.

Disclosed herein is an aqueous nucleic acid purification buffer comprising a polar aprotic solvent. Also provided herein are using such purification buffers to precipitate nucleic acids from a solution onto a solid support, thereby providing a solid support that binds to nucleic acids. Also provided herein is a method for treating a nucleic acid comprising exposing a sample comprising the nucleic acid to an aqueous medium comprising a polar aprotic solvent in the presence of a solid support; and precipitating the nucleic acid onto the solid support, thereby providing a solid support that binds to the nucleic acid. Further provided herein are kits and compositions comprising such aqueous nucleic acid purification buffers, as well as related nucleic acid analysis devices, and uses of the kits.

The invention relates to the technical field of inorganic compound preparation, and particularly discloses a method for preparing high-purity iron phosphate through low-temperature acidolysis of phosphated residues, which comprises the following steps: washing, drying and crushing the phosphated residues to obtain phosphated residue powder; carrying out low-temperature acidolysis reaction on the phosphated residue powder and inorganic acid in an aqueous medium at 60-90 DEG C to obtain an acidolysis solution; adding an oxidizing agent into the acidolysis solution, adjusting the pH value of the system to 2.5-4.5 at 65-85 DEG C, carrying out oxidation impurity removal, and filtering to obtain an iron-containing phosphate solution; and selectively supplementing an iron source according to the molar ratio of iron to phosphorus in the solution, adjusting the pH value to 1.0-3.0, and carrying out precipitation reaction at 65-75 DEG C to generate iron phosphate. According to the method, low-energy-consumption resource utilization of the phosphated residues is achieved by combining low-temperature acidolysis with oxidation impurity removal and component regulation and control, the product purity meets the battery-grade requirement, and the method is suitable for preparing the lithium battery positive electrode material precursor.

Provided is a water repellent composition containing a polymer (A), a polyether-modified polydimethylsiloxane (B), and an aqueous medium (C). The polymer (A) contains a repeating unit derived from a monomer (a1) represented by the formula CH2=C(-R11)-C(=O)-R12 (in the formula, R11 is a hydrogen atom or a methyl group and R12 is a C9-40 hydrocarbon group.).

The invention relates to self-curing keratin 3D printing ink integrated with shear activation microcapsules and a preparation method of the self-curing keratin 3D printing ink, and belongs to the technical field of biological 3D printing and intelligent materials.The preparation method comprises the steps that high-molecular-weight soluble keratin powder is dissolved in a biocompatible water-based medium with the pH being 6.5-8.5, and after even mixing and defoaming are conducted, a keratin base solution is obtained; wrapping the core material in a corresponding shell to obtain a microcapsule with the average particle size of 1-10 microns; under the stirring condition, the microcapsules are evenly dispersed into a keratin base solution at the temperature of 0-8 DEG C until a uniform suspension system is formed, and the self-curing keratin 3D printing ink integrating the shear activation microcapsules is obtained. And the curing process of the ink is internalized in the printing behavior, so that the printing process is simplified, and the equipment cost and the operation difficulty are reduced. The cross-linking agent is effectively isolated, so that the ink can be stably stored for several weeks before printing without gelling, and the problem that double-component ink must be immediately used after being mixed is solved.

The present invention relates to a process for the preparation of substituted 4-(N′-hydroxy-carbamimidoyl)benzoic acids, which can be obtained by nitrilase catalyzed hydration of substituted terephthalonitriles of formula (II) in an aqueous medium to afford (ammonium) 4-cyanobenzoic acids (IIa). The hydration is followed by treatment of the aqueous reaction medium with hydroxylamine or a salt thereof to afford amidoximes (I).

The invention relates to a composition in powder form, comprising an alkaline earth metal peroxide, alkalophilic or alkalotolerant aerobic saprophytic microorganisms, nutritive ingredients for these microorganisms, and optionally a base; and a solution as well as microspheres, their preparation processes and their uses in the decontamination of environments such as soils and aqueous media. figure for abstract: no figure

A method for producing modified polytetrafluoroethylene including: polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I) to obtain a modified polytetrafluoroethylene:wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more. Also disclosed is a composition containing the modified polytetrafluoroethylene and the polymer (I).

The invention discloses a low-stress processing method of an aluminum alloy annular forge piece, which comprises the following steps of: heating an aluminum alloy bar, preserving heat, upsetting, punching, pre-rolling, finally rolling into a ring piece, carrying out solution treatment on the ring piece, adopting an aqueous medium at the temperature of more than or equal to 85 DEG C during solution cooling, carrying out cold bulging after solution treatment, controlling the bulging quantity to be 1.8-2.2%, carrying out aging treatment after bulging, and finally carrying out low-stress processing on the ring piece. And thus, the low-stress aluminum alloy ring piece is obtained. According to the method, the residual stress of the aluminum alloy ring piece can be effectively removed, and the forge piece performance is improved. The method is used for machining the aluminum alloy annular forgings.

Some embodiments are directed to systems and methods for direct recycling of batteries. In one aspect, a method includes obtaining spent cathode materials from spent batteries. The method includes wet milling the spent cathode materials in an aqueous medium to obtain deagglomerated particles. The method includes spray drying the deagglomerated particles to obtain a plurality of clusters of particles. The method further includes annealing the plurality of clusters of particles in a gaseous environment to obtain a plurality of single particles.

A toner comprises a toner particle comprising a resin A and a resin B, wherein the resin A has a structure represented by a predetermined general formula, and the resin B has a monomer unit represented by a predetermined general formula, and a toner manufacturing method comprises a step of dispersing a toner base particle comprising the resin B in an aqueous medium to obtain a toner slurry, and a step of adding a radical polymerization initiator and a monomer composition comprising a monomer represented by a predetermined general formula to the resulting toner slurry to form the resin A on a surface of the toner base particle.

To provide an aqueous ink composition which is excellent in alcohol dilution property and ink followability.SOLUTION: An aqueous ink composition contains an aqueous urethane resin and an aqueous medium, wherein the aqueous urethane resin contains an aqueous urethane resin (A1) and an aqueous urethane resin (A2), the aqueous urethane resin (A1) is an ether-based urethane resin having a glass transition temperature of -70 to -30°C, the aqueous urethane resin (A2) is an ester-based urethane resin having a glass transition temperature of 60 to 120°C, and the content of the total of the aqueous urethane resin (A1) and the aqueous urethane resin (A2) is 20 to 94 mass% with respect to the total mass of a non-volatile content in the aqueous ink composition.SELECTED DRAWING: None

The invention provides a preparation method of a gelatin hemostatic composite material capable of being hydrated quickly, which comprises the following steps: S1) carrying out crosslinking treatment on a gelatin raw material to obtain a crosslinked gelatin material; s2) mixing the cross-linked gelatin material with an aqueous solution of hygroscopic inorganic salt to swell the cross-linked gelatin material; and S3) cooling and shaping the swollen crosslinked gelatin mixed material obtained in the step S2), and performing oriented freezing to obtain the gelatin hemostatic composite material. The invention also provides a rapidly hydratable hemostatic gelatin composite material and a hemostatic product. When the gelatin hemostatic composite material provided by the invention is in contact with a proper amount of aqueous medium, the hemostatic gelatin paste can be reconstructed by rapidly absorbing water through the micro capillary structure and the hygroscopic inorganic salt, so that the preparation waiting time before clinical use is shortened; meanwhile, the hemostatic gelatin composite material is a dry composition, so that the stability and shelf life of the product are improved.

This disclosure relates to polyethylene glycol (PEG)-functionalized nanoparticles comprising a functional agent, and preparation methods, properties and applications thereof. The nanoparticle represented by PEG-L-G / P, comprising a type of hydrophilic PEG, a hydrophobic functional agent G, which are covalently linked by L: a linker or a chemical bond, and a type of hydrophobic polymer P. The G and P form the hydrophobic core, while the PEG constitutes the hydrophilic outer layer of the nanoparticle in an aqueous medium. The functional agent comprises one or more functional compounds including a therapeutic drug, an imaging diagnostic agent, a photoelectric responsive diagnostic agent, an immune-stimulating agent, or a combination thereof. The nanoparticles comprising such functional agent can offer various applications in multiple biomedical fields.

The objective of the present invention is to provide a new component embedding technology using CNF. [Solution] Cellulose nanofibers (CNF) and added components are mixed in an aqueous medium and dried to provide a component-embedded dried body characterized in that the components are physically embedded within the aggregated structure of the CNF.

The invention discloses a graphene reinforced Al-Cu composite material and a preparation method and application thereof, and belongs to the technical field of metal matrix composite materials and preparation thereof. The problems that in an existing graphene reinforced aluminum matrix composite, graphene is poor in dispersity in an aluminum matrix, and harmful interface reaction is serious at the high temperature are solved. According to the preparation method, the surface of aluminum powder is plated with nano-copper particles through chemical plating, the potential of the aluminum powder in a water medium is regulated and controlled through a copper plating layer on the surface, the surface of the aluminum powder is provided with positive charges, graphene can be evenly dispersed in a matrix through electrostatic self-assembly, and meanwhile the surface copper plating layer is used for inhibiting interface reaction and hindering generation of a brittle phase. In addition, by adding the metal copper, the solid solution and second phase strengthening effects can be achieved, and the mechanical property of the composite material is further improved.

The invention relates to a formulation of microbial consortia selected from (a) Bacilli group, (b) Pseudomonas group and (c) Actinomycete group having nitrogen fixing capacity, when the bacteria comes in contact with soil or any aqueous media it gets active, which further helps for plant growth and makes the soil environment more suitable for plant.

The invention relates to the technical field of concrete admixtures, discloses a preparation method of a concrete anti-segregation agent, and aims to solve the problems of more side reactions, uncontrollable reaction process and disordered product molecular structures caused by unstable active functional group monomers in the existing water phase polymerization process. According to the core technical scheme, the method comprises the following steps: firstly, pretreating an anchoring functional group monomer and a pH-responsive shielding functional monomer in an aqueous medium to form a reversible shielding association body; and then, sequentially introducing the chain segment carrying the shielded anchoring functional group and the chain segment carrying the dispersed long side chain to the main chain of the polymer in stages by adopting a sequential dropwise addition polymerization process. The side reaction is effectively inhibited through the monomer pretreatment step, and the stability of the polymerization process is ensured; the accurate regulation and control of the microstructure of the polymer are realized through a sequential polymerization process, and the finally prepared anti-segregation agent shows excellent water retention anti-segregation performance and dispersing performance in concrete.

The invention relates to a method for manufacturing a super-hydrophobic PVC (polyvinyl chloride) pipe based on a phase separation pore-forming technology. According to the method, graded pores are constructed through compounding of a pore-forming agent system, water solubility and oil solubility in a synergistic manner; then ensuring that the pore-forming agent accurately positions the inner wall by utilizing an extrusion directional enrichment technology; a toxic solvent is replaced by aqueous medium phase separation; and finally, the coating is prevented from falling off through in-situ hydrophobization. A solution with high performance, low cost and zero pollution is provided for the super-hydrophobic pipe.

The present application relates to specifically defined copolymers, a method for their preparation, a complex containing this copolymer, the use of the copolymer for solubilizing and stabilizing membrane proteins as well as a kit for this use containing the polymers according to the present invention.

This disclosure relates to polyethylene glycol (PEG) -functionalized nanoparticles comprising a functional agent, and preparation methods, properties and applications thereof. The nanoparticle represented by PEG-L-G / P, comprising a type of hydrophilic PEG, a hydrophobic functional agent G, which are covalently linked by L: a linker or a chemical bond, and a type of hydrophobic polymer P. The G and P form the hydrophobic core, while the PEG constitutes the hydrophilic outer layer of the nanoparticle in an aqueous medium. The functional agent comprises one or more functional compounds including a therapeutic drug, an imaging diagnostic agent, a photoelectric responsive diagnostic agent, an immune-stimulating agent, or a combination thereof. The nanoparticles comprising such functional agent can offer various applications in multiple biomedical fields.

To provide an aqueous dispersion composition containing solid particles that includes at least one kind selected from a group consisting of resveratrol superior in dispersibility with inhibition of precipitation or an analog thereof; a production method thereof; and a food, cosmetics, and a pharmaceutical using the aqueous dispersion composition.SOLUTION: An aqueous dispersion composition contains solid particles including at least one kind selected from a group consisting of resveratrol and an analog thereof, an aqueous medium, and a dispersion auxiliary agent. The dispersion auxiliary agent includes at least one kind selected from phospholipid, saponin, sucrose fatty acid ester, polyglyceryl fatty acid ester, sorbitan fatty acid ester, polyoxyethylene phytosterol, polysaccharide, sugar derivative, polyvinyl pyrrolidone, polyvinyl alcohol, and enzyme treated matter.SELECTED DRAWING: None

The invention relates to astaxanthin microcapsule powder adopting a freeze spray drying technology and a production process of the astaxanthin microcapsule powder, and discloses the astaxanthin microcapsule powder which realizes astaxanthin activity protection, powder forming and continuous industrial preparation under a low-temperature condition through a synergistic strategy of embedding a composite wall material and regulating emulsion stability by glycerol, and the production process of the astaxanthin microcapsule powder. The astaxanthin microcapsule powder adopting the freeze spray drying technology is characterized by comprising the following components in parts by weight: 1-3 parts of astaxanthin oil, 20-40 parts of a wall material system, 0.2-0.5 part of an emulsifier, 0.1-0.3 part of an antioxidant and 30-50 parts of a water-phase medium, the wall material system is a composite wall material system and comprises gelatin, maltodextrin and hydroxypropyl-beta-cyclodextrin, and the water-phase medium is a water-phase medium. The wall material comprises gelatin, maltodextrin and hydroxypropyl-beta-cyclodextrin, and the gelatin accounts for 40%-60%, the maltodextrin accounts for 30%-50%, and the hydroxypropyl-beta-cyclodextrin accounts for 10%-20%.