749 results about "Aqueous medium" patented technology

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.

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.

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).

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).

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.

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 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.

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 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%.

The invention relates to the technical field of carbon nanomaterials, and discloses a water-based high-dispersion carbon nanotube-graphene composite conductive liquid and a low-temperature curing process thereof, the process comprises pre-dispersion, fine dispersion, conductive liquid preparation, curing treatment, low-temperature curing and post-treatment, and by optimizing the composite dispersion process and a surface modification method, the conductive liquid is prepared. The agglomeration phenomenon of nano materials is inhibited, uniform and stable dispersion of the carbon nanotubes and graphene in a high-water-based medium is realized, and the storage stability and applicability of the conductive liquid are improved; by designing a multi-stage low-temperature cross-linking mechanism, the curing temperature is reduced, the process time is shortened, and damage of high temperature to a heat-sensitive base material is avoided; through the synergistic effect of the graphene and the carbon nanotubes and the application of an interface enhancement technology, a continuous and stable three-dimensional conductive path is formed in a low-temperature film forming process, and the conductivity, the mechanical strength and the environmental stability of the conductive film are improved.

The invention discloses a preparation method of hydroxyapatite-artificial bear gall powder nanoparticles, the preparation method comprises the steps of preparing hydroxyapatite nanoparticles and loading artificial bear gall powder, the preparation method is simple and easy to implement, mild in condition and suitable for drug loading, and the preparation method is suitable for large-scale industrial production. The prepared nano-particles have good biocompatibility, degradability, high safety, high stability and high aqueous medium dispersibility, and due to the stability, the nano-particles can realize long-time circulation of drugs in vivo and avoid premature removal of the drugs, so that the bioavailability of the drugs is improved; the obvious pH-responsive slow release of the artificial bear gall powder can be realized, so that the artificial bear gall powder can be used in targeted therapy; compared with other carrier materials, the adopted raw materials are low in price, do not contain metal, have great advantages in cost and environmental protection, are easier to realize large-scale industrial production, and have good application prospects.

The method for stimulating the defenses of a plant or tree against an infection of bacterium or fungus comprises the application on the plant or tree of an aqueous extract from at least leaves of a Rocket plant. The application on the plant or tree is achieved by foliar spray. The extract is obtained by grinding the Rocket plants in an aqueous medium, filtering the ground material obtained and recovering the liquid extract of Rocket plants obtained after filtering.

A method of remediating a contaminated aqueous medium includes contacting the aqueous medium with an amount of a particulate nanocomposite material that contains elemental carbon (C); an orthorhombic titanium dioxide (TiO2); a tetragonal TiO2 crystalline phase; a cubic cadmium oxide (CdO) crystalline phase; a hexagonal magnesium titanate (MgTiO3) crystalline phase; and, an orthorhombic magnesium titanate oxide (Mg0.6Ti2.4O5). Based on the total number of atoms in the nanocomposite material and as determined by energy dispersive X-ray spectroscopy, the nanocomposite material has an atomic concentration of carbon (C) of from about 1 atomic percent (at. %) to about 5 at. %; an atomic concentration of magnesium (Mg) of from about 5 to about 15 at. %; an atomic concentration of titanium (Ti) of from about 15 to about 30 at. %; and, an atomic concentration of cadmium (Cd) of from about 1 to about 10 at. %.

The present application relates to a treating agent and a treated fiber fabric or coating. The treating agent includes a silicone polymer, an emulsifier, and an aqueous medium, wherein the silicone polymer includes structural units derived from monomer I, which includes a silicon monomer I-A and optionally a silicon monomer I-B, each of which is defined in the specification. The treating agent can simultaneously impart good oil and water repellency to a fiber fabric and good stain or graffiti resistance to a coating.

Provided in the present invention are a composition for filling, and a preparation method therefor and the use thereof. The composition comprises gel particles and an aqueous medium hyaluronate solution, wherein the gel particles comprise silk fibroin, hyaluronic acid or a salt thereof and a cross-linking agent, and the gel particles comprise a porous three-dimensional structure; and the mass ratio of the silk fibroin to the hyaluronic acid or a salt thereof to the cross-linking agent is (0.1-10):(1-20):1.

The present invention provides a tablet and a method for manufacturing a tablet that allows for easy formulation of coated tablets, even when calcium carbonate is used for coating the tablet. [Solution] A tablet coated with a coating layer, wherein the coating layer comprises calcium carbonate granules and a binder for binding the calcium carbonate granules together. The invention also provides a method for manufacturing a tablet coated with a coating layer, comprising a raw material preparation step of dispersing calcium carbonate granules and a binder for binding the calcium carbonate granules together in an aqueous medium to obtain a coating raw material, and a coating layer formation step of coating a tablet with the coating raw material.

The present invention relates to a biosensor comprising a plurality of functionalized sets of carbon atoms in the sp2 hybridisation state, its method of preparation and its use, in particular for the detection of ecotoxicological risks, in particular the determination of the toxicity of substances present in an aqueous medium, as well as to the corresponding determination method.

A water-based rust inhibiting agent according to the present disclosure contains a carboxylate, a sorbitan-based surfactant, a silane coupling agent having an epoxy group or a glycol group, and an aqueous medium.

This invention belongs to the field of dyeing technology, and specifically relates to a flame-retardant needle-punched felt made of oxidized fiber / acrylic chlorofiber and a non-aqueous medium dyeing method with cationic dyes. This method addresses the problems of difficult dyeing and limited color options associated with oxidized fibers. By blending acrylic chlorofiber with oxidized fibers, this invention ensures the flame-retardant properties of the needle-punched felt while allowing it to be dyed with cationic dyes in a non-aqueous medium. This solves the dyeing problem of oxidized fibers while being environmentally friendly and water-saving.

The invention relates to a method for producing higher alcohols. The invention also relates to a reaction mixture and a method for producing at least one higher alcohol, said method comprising a reaction mixture comprising a mixed culture of a first and a second microorganism in an aqueous medium comprising carbon monoxide gas, wherein the first microorganism is an acetogenic microorganism capable of converting a carbon source to acetic acid and / or ethanol; and-the second microorganism is selected from the group consisting of Clostridium kluyveri capable of converting acetic acid and / or ethanol to form an acid, and C. carboxidivorans; wherein the first microorganism is further capable of converting the acid to the corresponding higher alcohol, and the higher alcohol comprises at least 6 carbon atoms.

The invention provides a collagen nano dispersion preparation as well as a preparation method and application thereof. The preparation method of the collagen nano dispersion preparation comprises the following steps: S1, dissolving type I collagen and type III collagen in an acidic aqueous medium to prepare a collagen solution; s2, regulating and controlling the temperature, the pH value and the ionic strength of the collagen solution, so that the collagen solution is self-assembled; and S3, when the average particle size of the collagen fibers reaches a target range, performing dynamic freezing on the self-assembly system. The preparation and stable dispersion of the nano-scale collagen fiber can be realized without chemical crosslinking, the uniformity, biocompatibility and safety of the product are remarkably improved, and the nano-scale collagen fiber has excellent water-light effects and the like, and can be widely applied to the field of medical cosmetology.

A drainage-optimized additive composition for papermaking is disclosed. The composition comprises an aqueous media and a glyoxalated polyacrylamide (gPAM) resin having a weight average molecular weight (Mw) of at least about 5 MDa. The composition comprises from about 1.95 to about 2.45 wt. % of the gPAM resin. A method of preparing the composition is also disclosed, and comprises preparing a cationic acrylamide (cAM) prepolymer having at least one predetermined property, and selectively glyoxalating the cAM prepolymer by controlling the concentration of the cAM prepolymer in the aqueous media during glyoxalation in relation to the predetermined property. The method may be carried out in situ during a papermaking process (i.e., as an on-site method). A process of forming paper with the composition also disclosed, and comprises combining the composition with the aqueous suspension of cellulosic fibers, forming the cellulosic fibers into a sheet, and drying the sheet to produce a paper.

The invention provides temperature-sensitive enhanced composite hydrogel as well as a preparation method and application thereof. The temperature-sensitive enhanced composite hydrogel is prepared from the following raw materials: a triblock copolymer, hydroxybutyl chitosan and an aqueous medium. According to the invention, the synthetic polymer material and the natural biopolymer derivative are compounded, so that the defects of a single-component material are overcome, the mechanical strength and stability of the hydrogel are remarkably improved, and the prepared hydrogel has good biocompatibility and degradability.

The invention provides an oil-in-water emulsified cosmetic containing (a) an aqueous medium,(b) two or more higher fatty acids of 12 to 24 carbon atoms and alkali metal salts thereof,(c) at least one compound selected from the group consisting of monoalkyl glyceryl ethers having an alkyl group of 12 to 24 carbon atoms and monoalkenyl glyceryl ethers having an alkenyl group of 12 to 24 carbon atoms,(d) a thickener comprising (d-1) a polysaccharide derived from a microorganism and (d-2) a (meth)acrylic-based polymer selected from the group consisting of a poly(meth)acrylic acid salt and a polymer including at least one selected from the group consisting of a (meth)acrylic acid ester, a (meth)acryloylalkyltaurine and a salt thereof as a structural unit, and(e) a nonionic surfactant.

To provide a production method by which a fluoropolymer substantially free from dimers and trimers of a monomer constituting a polymer used in polymerization of a fluoromonomer can be produced.SOLUTION: A method for producing a fluoropolymer includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, where the polymer (1) is a polymer of a monomer (1) represented by the general formula (1) defined by CF2=CF-R-CZ1Z2-A0 (where R is a linking group; Z1 and Z2 are each independently F or CF3; and A0 is an anionic group), in which the content of a dimer and a trimer of the monomer (1) is 1.0 mass% or less based on the polymer (1).SELECTED DRAWING: None

A method of immobilizing contaminants disposed in an aqueous medium comprising contacting the aqueous medium with a particulate crystalline nanocomposite for a sufficient contact time to permit adsorption of the contaminants. The particulate crystalline nanocomposite includes: a tetragonal (CaMoO4) crystalline phase; a (CaSiO3) crystalline phase; and, a graphitic-(C3N4) crystalline phase, wherein at least a fraction of the graphitic-C3N4 is in the form of mesoporous nanosheets.