117 results about "Quaternary amine" patented technology

The invention provides a method for accurately regulating and controlling pores of an MXene material by utilizing a phosphonic acid ligand, which mainly comprises the following key steps of: directionally removing a main group element (A) layer of an MAX precursor by wet etching to obtain lamellar MXene, and then introducing a protonated quaternary amine compound intercalator to strip the MXene. And finally, carrying out functional modification and conversion by adopting a phosphonic acid ligand, and stably introducing phosphonic acid groups between layers and on the surface of MXene through solvothermal reaction to realize accurate regulation and control of interlayer spacing. The prepared material can realize efficient adsorption of uranyl in an acidic environment, shows high selectivity, high adsorption capacity and good acid stability and regeneration capacity to uranyl, provides a stable and efficient selective adsorption solution for treating high-acidity uranium-containing nuclear wastewater, and has a remarkable industrial application prospect.

The invention relates to the technical field of functional polymer materials and environmental pollution control, in particular to hydrogen bond self-assembled bio-based aerogel as well as a preparation method and application thereof. Quaternized chitosan and tannic acid are self-assembled in a water phase through hydrogen bonds and electrostatic interaction to form a three-dimensional network structure, no cross-linking agent or organic solvent is added, the specific surface area of the bio-based aerogel BET is 2-10 m / g, and through the strong electrostatic adsorption effect between cationic groups in the quaternized chitosan and anionic dye molecules (such as Congo red), the cationic groups in the quaternized chitosan and the anionic dye molecules (such as Congo red) are separated from the anionic dye molecules. The material shows excellent dye removal efficiency and adsorption capacity under the conditions of normal temperature and normal pressure and hydrogen bonds provided by rich phenolic hydroxyl groups in tannic acid molecules and a pi-pi accumulation effect, the aerogel can quickly adsorb anionic dye, the adsorption process is efficient, the selectivity is high, the structure is stable, and the aerogel is degradable and can be applied to the field of dye adsorption. And the method has good reproducibility and repeated use stability, and has wide practical application and popularization prospects.

The invention provides a powerful heavy oil stain cleaning agent and a preparation method thereof, and belongs to the technical field of cleaning agents. The cleaning agent is prepared from the following components in percentage by mass: 70 to 90 percent of water, 0.2 to 1.0 percent of tetrasodium glutamate diacetate, 0.2 to 1.0 percent of coconut alkyl quaternary amine ethoxylate, 1.0 to 3.0 percent of C9-11 fatty alcohol-polyoxyethylene ether, 1.0 to 5.0 percent of fatty ether nonionic surfactant, 1.0 to 8.0 percent of polyol solvent, 1.0 to 5.0 percent of monoethanolamine, 0.5 to 2.0 percent of sodium hydroxide and 0.1 to 0.3 percent of essence. The powerful heavy oil stain cleaning agent is good in cleaning effect, small in damage to cleaned objects and good in environmental protection performance.

The invention provides a preparation method of small-particle-size narrow-distribution double-group anion exchange resin. The preparation method comprises the following steps: respectively preparing an oil-phase mixed solution and a water-phase mixed solution; carrying out heating reaction on the two materials under a magnetic stirring condition to obtain superfine resin white balls; the superfine resin white balls are prepared into chloromethylated superfine resin white balls, then primary amination treatment is carried out, quaternary amine groups are grafted, and the double-group superfine anion exchange resin is obtained. The small-particle-size narrow-distribution double-group anion exchange resin of which the effective particle size is less than 50 microns and the uniformity coefficient is less than 1.5 is prepared through the synergistic dispersion effect of the polyvinyl alcohol and the sodium hexametaphosphate and the uniform shearing effect of magnetic stirring.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of an olefin monomer of benzocrown ether imidazole polymerized ionic liquid. Comprising the following steps: adding benzo-12-crown-4-ether, iodo-alkyl acid and polyphosphoric acid into a heat preservation kettle, carrying out heating reaction, adding chloro-alkyl acid, carrying out heating reaction, dropwise adding water to hydrolyze residual polyphosphoric acid, extracting an organic phase by chloroform, washing chloro-alkyl acid by using a sodium carbonate aqueous solution, drying, carrying out suction filtration, and transferring into a reaction kettle; adding 1-methylimidazole, carrying out heating reaction, carrying out rotary evaporation to obtain chloroform, adding dioxane, triethylamine and hydroquinone, carrying out heating reaction, and carrying out rotary evaporation to obtain dioxane; the ionic liquid, organic salt and pure water are added into a dissolving kettle, dichloromethane is used for extracting an organic phase, pure water is used for washing chloride ions and iodide ions in the organic phase, dichloromethane is obtained through rotary evaporation, and a product is dried in vacuum. According to the method, the steps of acylation, quaternization and dehydrohalogenation are used, so that the steps are simplified, and the purification treatment process of acylation after quaternization is avoided.

The application provides a kind of zinc oxide nanoparticles / quaternary amine modified polystyrene nanospheres and its preparation method and application.The application prepares carboxyl functionalized PS / PVP nanospheres with high monodispersity by environmentally friendly water dispersion polymerization method;ZnONPs are successfully loaded after complexing zinc ions with the surface PVP pyrrolidone ring of PS / PVP nanospheres and reducing with reducing agent, and the surface of nanospheres is modified with quaternary amine groups by amidation and further quaternary amination of the surface carboxyl groups of PS / PVP nanospheres.The preparation method is simple, and the reaction condition is easy to realize.The material obtained by the method of the application is polystyrene nanosphere surface loaded with zinc oxide nanoparticles and grafted with quaternary amine groups;it is applied to antibacterial, and zinc oxide nanoparticles and quaternary amine groups play a synergistic effect, so that the material shows high antibacterial activity and can effectively inhibit the proliferation of escherichia coli and staphylococcus aureus.

The invention relates to an anion exchange membrane containing a composite film of an ionomer and zirconium oxide particles of formula ZrO2, the ionomer being a block polymer of formula (AB)nA, the symbol A representing a polyvinylaromatic block bearing quaternary amine groups, the symbol B representing a hydrogenated block of a poly(1,3-diene) or a copolymer comprising monomer units of a 1,3-diene and a vinylaromatic monomer, n being an integer equal to or greater than 1, the zirconium oxide particle content of the composite film being greater than 40% by mass of the composite film mass, the zirconium oxide particles having a median volume size, D50, greater than 100 nm and less than 1 µm. The membrane exhibits good plasticity.

This invention relates to the field of nanofiber technology, and particularly to a quaternary ammonium-modified PPACE-Cl nanofiber, its preparation method, and its application. S1. Preparation of PAN electrospun nanofibers: Polyacrylonitrile, polyvinylpyrrolidone, and carboxylated multi-walled carbon nanotubes are stirred with N,N-dimethylformamide at room temperature for 6-12 h to obtain a uniform and transparent spinning solution. The resulting spinning solution is then placed in a 10 mL syringe and spun in an electrospinning machine to obtain PAN / PVP / MWCNT-CCOH nanofibers. The obtained nanofibers are then placed in hot water at 60-100°C to remove PVP, yielding PAN / MWCNT-COOH nanofibers. S2. Preparation of nitrogen-enriched modified PPACE nanofibers: The PAN / MWCNT-COOH nanofibers prepared in step S1 are placed in an aqueous solution of polyethyleneimine in a high-pressure reactor to obtain modified PPACE nanofibers. S3. Preparation of quaternary ammonium-modified PPACE-Cl nanofibers. The quaternized PPACE-Cl nanofibers of this invention will prepare nanofibers with a surface rich in positive charge, thereby achieving the effect of AuCl4 exhibiting a negative charge in aqueous solution. ‑ Selective enrichment and adsorption are carried out.

The present disclosure relates to a method of preparing a sustained release formulation, the method comprises, mixing of a carrier composition with a volatile organic substance to form a blend; the carrier composition comprises: (i) a hydrophobic organic carrier; and (ii) a quaternary amine, as well as to methods of preparing the sustained release formulation. Also forming part of the present disclosure is a sustained release formulation comprising a blend of: (i) a hydrophobic organic carrier; (ii) a quaternary amine and (iii) a volatile organic substance; wherein the sustained release formulation is essentially water free; and wherein the quaternary amine is of a source different from the source of the hydrophobic organic carrier, as well as to the uses of the sustained release formulation for controlling a target organism. Finally, there is a disclosed carrier composition comprising a blend of: (i) a hydrophobic organic carrier; and (ii) a quaternary amine.

An environmental cracking inhibitor includes a base corrosion inhibitor and a sulfur compound modifier. The base corrosion inhibitor can be an imidazoline, an amine, a quaternary amine, a fatty acid derivative, a phosphate ester, or combinations thereof. The sulfur compound modifier can have the general formula HS—X, where X is a heteroatom substituted alkyl, cycloalkyl, aryl, and / or alkylaryl group. Suitable heteroatoms are sulfur, oxygen, phosphorus, nitrogen, and combinations thereof. The sulfur compound modifier can be 2 mercaptoethanol, cysteamine, or a cysteamine salt.

The application discloses an artificial intelligence-based wound pH detection method and a matched enzymatic in-situ forming hydrogel dressing and a preparation method, and belongs to the technical field of biomedical materials.The application identifies and analyzes a hydrogel image with a pH response reagent through a convolutional neural network algorithm, generates an optimal identification model to identify pH, and further evaluates a wound healing state, so that a new strategy is provided for monitoring and instant diagnosis.The matched enzymatic in-situ forming hydrogel dressing can be flexibly attached to various irregular wounds by consuming glucose through glucose oxidase to generate free radicals to initiate in-situ polymerization of the hydrogel.Meanwhile, the added quaternary amine chitosan has antibacterial function, and can better promote wound healing.The application can improve treatment efficiency and save treatment cost, and has the characteristics of safety, high efficiency and multifunction.

The preparation method comprises the following steps: mixing a lithium source material, water, a first solvent and quaternary amine alkali, reacting the quaternary amine alkali with carbon dioxide in a reaction atmosphere containing carbon dioxide to generate HCO3 <->, reacting the HCO3 <-> with lithium ions in the lithium source material to generate lithium bicarbonate, and collecting a water phase after the reaction; decomposing lithium bicarbonate in the water phase to generate lithium carbonate, collecting a solid phase, and decomposing lithium carbonate in the solid phase to generate lithium oxide to obtain an intermediate; dissolving quaternary ammonium iodide in a second solvent, adding the intermediate, converting the lithium oxide into lithium hydroxide, carrying out ion exchange on the lithium hydroxide and the quaternary ammonium iodide to generate lithium iodide, and collecting a liquid phase; and collecting the lithium iodide in the liquid phase. According to the present invention, based on the characteristics of the specific quaternary ammonium base and the quaternary ammonium iodide salt, the Li in the lithium source material is selectively reinforced, carbonized and leached, the anion impurities in the lithium source material are removed, the anion exchange in the organic phase is achieved, and the high-purity anhydrous lithium iodide is prepared.

The application discloses a low-molecular-weight hydrophobic associating polymer, and a molecular formula of the low-molecular-weight hydrophobic associating polymer is: wherein R is erucylamide propyl dimethyl quaternary amine, hexadecyl dimethyl quaternary amine, octadecyl dimethyl quaternary amine or behenyl dimethyl quaternary amine, x, y, z and m are monomer molar ratios, x is 69% to 80%, y is 16% to 23%, z is 3.5% to 7%, and m is 0.5% to 1%. The application further discloses a preparation method and application of the low-molecular-weight hydrophobic associating polymer. The fracturing fluid prepared from the low-molecular-weight hydrophobic associating polymer has excellent hydrophobic associating performance, shows the characteristics of low viscosity and high elasticity, can simultaneously meet the construction requirements of strong sand carrying capacity and easy pumping, and has a good application prospect in oilfield fracturing.

The invention provides a phase change absorbent and an integrated trapping method for desulfurization and decarburization of flue gas, the flue gas containing CO2 and SO2 is treated based on the phase change absorbent, and particularly, the flue gas is treated by adopting the integrated trapping method disclosed by the invention, so that CO2 and SO2 can be synchronously absorbed, and selective regeneration is realized. The phase change absorbent is an aqueous solution containing 5-80 wt% of organic amine and 5-80 wt% of ionic liquid; the ionic liquid comprises anions and cations; the positive ions are selected from one or more of imidazole positive ions, pyrrolidine positive ions, quaternary amine positive ions, pyridine positive ions, piperidine positive ions, piperazine positive ions and pyrrole positive ions; the anions are selected from one or more of hydrophobic fluorine-containing anions, hydrophobic sulfonate-containing anions and hydrophobic fatty acid anions.

A liquid cleaning composition including: at least 80 wt. % liquid solvent; a cationic quaternary amine biocide; and a non-cationic, amine oxide moisturizing agent.

The invention provides a preparation method and application of a high-flux blood-compatible polyimide separation membrane, polyimide polymer powder is added into a solvent B, a quaternization reagent is added to obtain quaternization polyimide polymer powder, the quaternization polyimide polymer powder is added into a solvent C, and the high-flux blood-compatible polyimide separation membrane is obtained. And scraping the membrane casting solution by using a scraper to prepare an asymmetric separation membrane, and washing to obtain the high-flux blood-compatible polyimide separation membrane. The separation membrane applied to the field of biological water treatment is prepared through chemical imidization condensation reaction and quaternization reaction. The high-flux blood-compatible polyimide separation membrane obtained by the invention has excellent thermal stability, good mechanical properties, protein adsorption resistance, bacterial adhesion resistance, blood compatibility and anticoagulation capability. The method has wide application prospects in the fields of ultrafiltration, hemodialysis, purification, biological sewage treatment and the like.

The invention discloses an imidazoline Schiff base corrosion inhibitor and a preparation method and application thereof, and relates to the field of oil well metal pipe anticorrosive coatings. Heterocyclic carboxylic acid reacts with organic polyamine to obtain an imidazoline reactant; reacting the imidazoline reactant with iodo-n-butane to obtain a quaternization modified reactant; and reacting the quaternization modified reactant with cinnamyl aldehyde to obtain the corrosion inhibitor. Three molecular groups in the corrosion inhibitor can play a synergistic effect, and the corrosion inhibitor has a good corrosion inhibition effect under strong acid environment and high temperature environment conditions. The corrosion inhibitor can be applied to corrosion protection of oil casing materials in the development process of oil and gas fields, so that smooth production and development of oil and gas resources are guaranteed with low economic cost.

The present disclosure provides compositions and methods for sample processing, particularly for oligonucleotide analysis e.g. analysis of formulated nucleic acid drugs. A composition for pretreating at least one target nucleic acid in a biological mixture provided herein includes a chaotropic agent selected from a substituted guanidine, a substituted amidine, a substituted quaternary amine, or a combination thereof, an optional protease, and / or an optional disulfide-reducing agent. Methods of analyzing at least one target nucleic acid in a biological mixture is also provided herein. Furthermore, the present disclosure provides methods for quantifying at least one target cationic lipid interacting with a nucleic acid.

Described herein are wound dressings and methods of their use, wherein the wound dressings comprise a polymeric component. The polymeric component is a polyethyleneimine intermediate selected from the group consisting of:at least one R60 is —(CH2)3OH but less than 50% of all R60 are —(CH2)3OH; and the polyethyleneimine intermediate has a ratio of total quaternary amines to total hydroxyl groups of at least 1:1.

The invention comprises a method and apparatus for dispensing a biocide, comprising: a container and a biocide formulation in the container, the biocide formulation comprising: (1) the biocide and a solvent, the biocide comprising a protonated polymer comprising repeating charged units; (2) a total cationic charge density in a range of 0.005 to 0.95 meq / g, at least ten percent of the total cationic charge density from charges of non-quaternary amines of the protonated polymer; (3) an activity coefficient, γ, of a protonated site of the protonated polymer, of greater than 0.7; and (4) a counterion chloride concentration of less than 900 ppm.

The invention discloses an absorbable antibacterial medical material, a preparation method thereof and an absorbable antibacterial medical instrument, and belongs to the technical field of medical instruments. The absorbable antibacterial medical material comprises an absorbable main polymer, an absorbable antibacterial polymer and a hydrophilic polymer, the absorbable main polymer accounts for 50-97 wt% of the total weight of the three polymers; the absorbable antibacterial polymer accounts for 2-30 wt% of the total weight of the three polymers; the hydrophilic polymer accounts for 1-20wt% of the total weight of the three polymers; the absorbable antibacterial polymer is composed of a plurality of repetitive units, the repetitive units are caprolactone structural units, the caprolactone structural units have thioether bond grafted antibacterial side chains, and the antibacterial side chains contain guanidyl or quaternary amine groups. The antibacterial plastic has stable antibacterial ability, good mechanical properties and high mechanical retention rate in the degradation process.

The invention discloses a method for preparing low molecular weight poly (gamma-butyrolactone) polyhydric alcohol under a solvent-free condition. The method comprises the following steps: (1) dehydrating quaternary amine alkali and polyol under heating and vacuum conditions to form a catalytic initiation system; (2) diluting the catalytic initiation system by using part of gamma-butyrolactone; and (3) adding the diluted catalytic initiation system into the precooled gamma-butyrolactone to carry out polymerization reaction, and reacting for a certain time to obtain the poly (gamma-butyrolactone) polyol. Compared with the prior art, the method provided by the invention has the remarkable advantages of low cost of a catalytic system, easiness in preparation, no need of a solvent in a reaction process, high conversion rate, easiness in realization of industrial production and the like.

A product for adsorbing one or more PFAS from a liquid is disclosed. The product may comprise attapulgite or sepiolite that has been surface functionalized with (a) a quaternary amine surface coating solution that comprises a mono-quaternary amine compound or a di-quaternary amine compound and (b) a mercapto surface coating solution that comprises a surface coating agent that includes one or more mercapto groups that chemically bond to the attapulgite or sepiolite surface. When the quaternary amine surface coating solution includes the mono-quaternary amine compound, the product is free of di-quaternary amines. When the quaternary amine surface coating solution includes the di-quaternary amine compound, the product is free of mono-quaternary amines. Also disclosed is a method of producing the product and a method of adsorbing a PFAS in a liquid using the product.

The present application relates to a kind of aluminum alloy cleaning agent and its preparation method and application, aluminum alloy cleaning agent includes by weight percentage: chelating agent 0.1-0.5%, surfactant 4-8%, cleaning additive 6-12%, monobasic acid 5-10%, solubilizing agent 3-5%, the rest is water;Its advantages are that, using different surfactant fatty acid methyl ester ethoxylate and C9-11 ethoxylated alcohol: coconut alkyl quaternary amine ethoxylate mixture compound use, give consideration to wetting, emulsification, oil removal etc., not only clean thoroughly to the oil dirt on the surface of aluminum alloy, and the cleaning agent of the present application does not add aluminum corrosion inhibitor, strong alkali additive, does not contain phosphorus and silicon, friendly to environment, no corrosion to aluminum alloy, no residue, will not affect the performance of aluminum alloy, reduce the harm to human body, and wastewater treatment pressure, in the application of cleaning oil dirt on the surface of aluminum alloy and improving the service life of aluminum alloy cleaning agent has important value.

The invention discloses an iron-based composite material and application thereof in arsenic-containing wastewater treatment. The material takes a porous skeleton constructed by freeze drying and calcining as a carrier, and the skeleton is formed by combining modified charcoal and MIL-101 (Fe) through an interface; nZVI and CuO are loaded on the surface of the skeleton in sequence, and a chitosan gel layer with enriched groups is coated on the surface of the skeleton. The preparation method comprises the following steps: compounding an MIL-101 (Fe) dispersion liquid with nZVI and modified charcoal in an inert atmosphere; dropwise adding a copper nitrate solution, and carrying out alkaline conversion to load CuO; introducing a quaternized chitosan acetic acid solution to form neutral gel; and carrying out freeze drying and segmented microwave roasting to solidify the structure. The surface carboxylation of the modified biochar is realized through nitric acid acidification and inert atmosphere roasting. The material has a stable porous structure and synergistic active sites, and is suitable for efficient purification of arsenic-containing wastewater.

This invention discloses an imidazoline Schiff base corrosion inhibitor, its preparation method, and its application, relating to the field of anti-corrosion coatings for oil well metal pipes. The method involves reacting a heterocyclic carboxylic acid with an organic polyamine to obtain an imidazoline reactant; reacting the imidazoline reactant with iodobutane to obtain a quaternized modified reactant; and reacting the quaternized modified reactant with cinnamaldehyde to obtain the corrosion inhibitor. The three molecular groups present in the corrosion inhibitor of this invention can exert a synergistic effect, exhibiting good corrosion inhibition performance under strong acid and high-temperature conditions. The corrosion inhibitor of this invention can be applied to protect oil and gas field casing materials from corrosion during oil and gas field development, thereby ensuring the smooth production and development of oil and gas resources at a lower economic cost.

The application discloses an electrode assembly and a battery. The electrode assembly comprises a plurality of pole pieces and a separator arranged between two pole pieces with opposite polarities, wherein at least one pole piece has a plurality of first protrusions; the pole piece comprises a current collector and an active material layer arranged on the surface of the current collector, the first protrusions are formed by bending a part of the current collector and a part of the active material layer towards the same side of the pole piece, the height of the first protrusions is H1, and 20 microns ≤ H1 ≤ 80 microns; the active material layer comprises a softener, the softener is selected from at least one of organic silicon, a fatty acid salt and a quaternary amine salt, the weight percentage of the softener in the total weight of the active material layer is A, and 0.01% ≤ A ≤ 0.4%. In the application, the overall flexibility of the pole piece 300 is improved by adding the softener to the active material layer, the height of the first protrusions is higher, the active material layer at the first protrusions does not produce micro-cracks, and then the electrode assembly meeting the use requirements is easily processed, and the electrolyte infiltration effect is improved.

The application relates to the technical field of anion exchange membrane preparation, in particular to a PyPECH / PVA / PI diffusion dialysis acid recovery anion exchange membrane based on a crosslinked network structure, a preparation method and application thereof. PVA, PI and polyepichlorohydrin (PECH) are stirred in dimethyl sulfoxide to form a uniform mixture, then the mixture is coated on glass and placed in an oven at 80 DEG C for 48 hours to form a film by evaporation. The prepared film is immersed in a bipyridine reagent for 8 hours, then the bipyridine on the surface of the film is washed away, both sides of the film are covered with a polytetrafluoroethylene film, a flat plate heating machine is used to keep the temperature at 80 DEG C under a pressure of 1 Mpa, and crosslinking and quaternary amination reaction is carried out for 8 hours. After the reaction is completed, the film is taken out after being cooled to room temperature, and the film is cleaned with deionized water. After drying, the film is heated to 120 DEG C in an oven, then the temperature is lowered by 10 DEG C every 2 hours until the temperature is lowered to room temperature, the film is taken out, and the above steps are repeated three times to prepare the anion exchange membrane. The prepared anion exchange membrane has excellent dimensional stability and diffusion dialysis performance.

Compositions and methods for dyeing aramids include one or more dye carriers selected from dialkyl imidazolium salts having a cation of the general formula: where R1 and R2 are, independently, selected from C1 to C8 alkyl, and bis-quaternary amine salts having a cation of the formula: where R1 is, independently at each instance, a C1-C6 alkyl; R2 and R3 are, independently at each instance, a C1-C6 alkyl or substituted C1-C6 alkyl, and X is, independently at each instance, a halogen; and one or more cationic dyes.

A preparation method of lithium iodide and a solid-state battery, the preparation method comprising mixing a lithium source material, water, a first solvent and a quaternary amine base, reacting the quaternary amine base with carbon dioxide under a reaction atmosphere containing carbon dioxide to generate HCO3 ‑ , HCO3 ‑ reacting with lithium ions in the lithium source material to generate lithium bicarbonate, collecting an aqueous phase after the reaction; decomposing the lithium bicarbonate in the aqueous phase to generate lithium carbonate, collecting a solid phase, decomposing the lithium carbonate in the solid phase to generate lithium oxide to obtain an intermediate; dissolving a quaternary ammonium iodide salt in a second solvent and adding the intermediate, converting the lithium oxide into lithium hydroxide, and performing ion exchange between the lithium hydroxide and the quaternary ammonium iodide salt to generate lithium iodide, collecting a liquid phase; and collecting the lithium iodide in the liquid phase. Based on the characteristics of the specific quaternary amine base and the quaternary ammonium iodide salt, the application selectively enhances carbonization leaching of Li in the lithium source material, removes anion impurities in the lithium source material, and also realizes anion exchange in an organic phase and preparation of high-purity anhydrous lithium iodide.