58 results about "Polysulfone" patented technology

The utility model discloses a kind of polysulfone granular material washing devices, relate to polysulfone production equipment technical field.Polysulfone granular material washing device, including washing kettle, heat preservation device and washing liquid circulating device, the upper portion of washing kettle is provided with feed inlet, top is provided with eluent outlet, bottom is provided with washing liquid inlet, the lower portion in washing kettle is provided with first perforated plate, upper portion is provided with second perforated plate, second perforated plate can be moved back and forth along the axial direction of washing kettle;Heat preservation device is set on washing kettle;Washing liquid circulating device includes the cooler, solid-liquid separator, washing liquid tank, circulating pump and heater connected in sequence.The technical scheme of the utility model adopts the mode of ethanol countercurrent circulation flow to wash polysulfone granular material in washing kettle, and when washing, limit the polysulfone granular material to be washed between first perforated plate and second perforated plate, can more fully elute diphenyl sulfone on polysulfone granular material, guarantee the washing effect.

The present invention relates to a hollow fiber membrane comprising at least one polysulfone-based material and at least one polyvinylpyrrolidone-based polymer, characterized in that the porosity of the hollow fiber membrane is from 77.5% to 82% and the sieving coefficient for dextran with a molecular weight of 10,000 g / mol is from 0.42 to 0.75 and the albumin sieving coefficient of the hollow fiber membrane is less than 0.01.

The application relates to a double-layer separation membrane and a preparation method thereof. The preparation method of the double-layer separation membrane comprises the following steps: uniformly mixing ZIF-67 nanoparticles, polysulfone particles, a first organic solvent and deionized water under the condition of 5 DEG C to 20 DEG C to obtain an outer layer casting solution; dissolving the polysulfone particles in a second organic solvent and uniformly mixing under the condition of 60 DEG C to 80 DEG C to obtain an intermediate layer casting solution; simultaneously forming the outer layer casting solution and the intermediate layer casting solution on a base material by adopting a double-knife co-casting method to obtain a double-layer separation membrane precursor; and performing baking treatment on the double-layer separation membrane precursor under the condition of 40 DEG C to 60 DEG C to make the outer layer casting solution form a film; then immersing the double-layer separation membrane precursor into a coagulation bath to obtain the double-layer separation membrane after complete solidification. The double-layer separation membrane with specific structure and performance is prepared by adopting the double-knife co-casting method, the flux of the double-layer separation membrane is large, the double-layer separation membrane is suitable for water treatment, dye treatment, metal ion removal and the like, and is favorable for wide application.

An aromatic polysulfone having repeating units comprising the structure represented by the following general formula (S-1) and terminal structures represented by the following general formula (Se-1). -ph 1 -SO2-ph 2 -O- (S-1) [In formula (S-1), ph 1 and ph 2 Each can be independently a phenylene group that may have substituents. [(Ra)] x -Ar-O- (Se-1) [In formula (Se-1), Ar is an aromatic hydrocarbon group that may have substituents; Ra is a salt of sulfonic acid group or sulfonic acid group; x is an integer greater than 2, and multiple Ra can be the same or different.]

This invention provides the application of adamantane-1,3-diamine in the preparation of reverse osmosis membranes with controllable desalination performance, the reverse osmosis membrane itself, its preparation method, and its application, relating to the field of reverse osmosis membrane preparation. The controllable desalination performance reverse osmosis membrane includes a polysulfone ultrafiltration membrane and a polyamide layer disposed on the surface of the polysulfone ultrafiltration membrane; wherein the polyamide layer is formed by interfacial polymerization of an aqueous amine solution and an organic acyl chloride solution followed by heat treatment and curing; and the aqueous amine solution contains adamantane-1,3-diamine. This invention, by adding adamantane-1,3-diamine, prepares a series of SWRO membranes with similar surface morphology and permeate flux, but different desalination performances. This allows for flexible fulfillment of diverse application requirements without altering existing permeate processes and membrane cleaning processes, improving the overall efficiency and economy of the system.

The application relates to the technical field of reverse osmosis membranes, in particular to a high-performance reverse osmosis membrane and a preparation method thereof. The reverse osmosis membrane is prepared by the method. The method comprises the following steps: growing a cuprous oxide nanoparticle layer on a polysulfone porous membrane layer in situ, so as to obtain a first combined membrane piece; growing a polyacrylamide layer on the cuprous oxide nanoparticle layer in the first combined membrane piece, so as to obtain a second combined membrane piece; and growing a polyamide layer on the polyacrylamide layer in the second combined membrane piece, so as to obtain a high-performance reverse osmosis membrane. The high-performance reverse osmosis membrane prepared by the application has high water flux and high desalination rate, and the high water flux and the high desalination rate are stable.

A composite working electrode and an electrochemical sensor comprising the same are disclosed, the composite working electrode comprising at least one carbon material coated with a polysulfone and at least one active redox species comprising an oxygen family atom bonded in a ring structure, wherein the ring structure is substituted with a carbon ring, and wherein a moiety containing a hydrogen atom is connected to the carbon ring such that it is configured to provide a hydrogen bonding with the bonded oxygen family atom.

This application relates to the field of fire extinguishing materials technology, and in particular to a microcapsule fire extinguishing agent, its preparation method, and its application. A microcapsule fire extinguishing agent includes a core material and an outer shell layer; the core material is encapsulated within the outer shell layer; the core material is a low-boiling-point liquid fire extinguishing agent, and the outer shell layer comprises a first shell layer and a second shell layer from the inside out; the first shell layer includes a polymer material with multiple active hydrogen atoms, a crosslinking agent, and an antifoaming agent, and the second shell layer is a polysulfone resin; the active hydrogen atoms in the polymer material of the first shell layer enhance the adhesion performance of the second shell layer on the first shell layer and the synergistic performance of both; further, the crosslinking agent is used in the second shell layer to improve the density and water resistance of the first shell layer; the combined use of the polymer material with multiple active hydrogen atoms in the first shell layer, the crosslinking agent, and the polysulfone resin in the second shell layer results in a microcapsule fire extinguishing agent with excellent encapsulation rate, water resistance, and fire extinguishing performance, thereby improving its stability during storage and use.

The present application relates to the technical field of polyimide, in particular to a modified polyimide resin for carbon fiber composite material, and a preparation method and application thereof.Preparation raw materials include bisether anhydride type polyamide acid solution, ketone anhydride type polyamide acid solution and thermoplastic polymer solution, and the polymer in the thermoplastic polymer solution includes at least one of polyether ether ketone, polyether sulfone, polysulfone and polyphenyl sulfone.The present application can effectively reduce the viscosity while keeping the mechanical properties by modifying the polyimide resin with specific thermoplastic polymer, and the viscosity of the modified polyimide resin at 25 DEG C can be reduced to 5000 cp by selecting polyether sulfone; and the mechanical properties of the modified polyimide resin based composite material can be improved by limiting the weight ratio of the bisether anhydride type polyamide acid solution, the ketone anhydride type polyamide acid solution and the thermoplastic polymer solution to 1:(0.9-1.1):(0.3-0.8).

The invention relates to a hollow-fiber membrane, having a membrane material which comprises a hydrophobic polymer and a hydrophilic polymer. The hydrophobic polymer comprises a polysulfone, and the hydrophilic polymer comprises a polyvinylpyrrolidone in a proportion of 1-9 wt.%, wherein the content of polyvinylpyrrolidone in the layer which is near the surface of the inner lumen of the membrane equals 35 wt.% or more according to the XPS measuring method, and the albumin filter coefficient equals less than 0.01, measured according to the method specified in the description. The invention additionally relates to a hollow-fiber dialyzer comprising such a membrane.

This invention relates to a hollow fiber membrane having a membrane material comprising a hydrophobic polymer and a hydrophilic polymer, wherein the hydrophobic polymer comprises polysulfone, and the hydrophilic polymer comprises polyvinylpyrrolidone in a proportion of 1% to 9% by weight, wherein the content of polyvinylpyrrolidone in the layer near the surface of the membrane lumen is 35% by weight or more according to XPS measurement, and the albumin filtration coefficient is less than 0.01 according to the method given in the specification. Furthermore, this invention relates to a hollow fiber dialyzer comprising such a membrane.

This invention provides an antifouling ultrafiltration membrane with adjustable pore size, its preparation method, and its application, belonging to the field of membrane separation technology. The antifouling ultrafiltration membrane provided by this invention includes a polyolefin support layer, and a polysulfone ultrafiltration layer and a sulfonated polysulfone functional selective layer stacked on the surface of the polyolefin support layer. The ultrafiltration membrane of this invention can form a superhydrophilic-underwater superoleophobic interface, which can significantly inhibit the adsorption, adhesion, and scaling of oil droplets on the membrane surface, alleviate membrane fouling problems, and significantly improve the membrane flux recovery rate and long-term operational stability. The ultrafiltration membrane prepared by this invention simultaneously possesses high separation accuracy and high water flux, with good batch uniformity, and has excellent application prospects in the field of oily wastewater treatment.

The present application relates to the technical field of moisture-permeable membrane materials, and provides a polysulfone moisture-permeable hollow fiber membrane, the average pore size of a first surface is not greater than 100 nm, and the average pore size of a second surface is not less than 0.25 μm; the content of sulfonic acid groups on the first surface is greater than the content of sulfonic acid groups on the second surface, and the difference between the content of sulfonic acid groups on the first surface and the content of sulfonic acid groups on the second surface is not less than 1X10 ‑3 -4; the water conversion efficiency of the hollow fiber membrane is 40% to 70%, and the water vapor permeation rate of the hollow fiber membrane is 0.5 to 3 g / min. The structure of the polysulfone moisture-permeable hollow fiber membrane provided by the present application shows high water conversion efficiency and water vapor permeation rate, and also has good tensile strength, so that it has a long service life.

The present application relates to a kind of anti-pollution temperature-sensitive polyamide nanofiltration membrane and its preparation method;Including polysulfone base film and the polyamide active separation layer formed on it by interfacial polymerization, polyamide active separation layer surface is covalently grafted with a layer of copolymer brush, copolymer brush is formed by the random copolymerization of zwitterionic monomer structural unit and temperature-sensitive monomer structural unit by ultraviolet light initiation. By ultraviolet light initiation grafting technology, sulfobetaine methacrylate and N-isopropyl acrylamide are copolymerized on the same membrane surface, realize the synergistic effect of the strong hydration and antibacterial properties of zwitterionic polymer and the intelligent conformational transition ability of temperature-sensitive polymer. In the anti-bovine serum albumin pollution test, the flux decline rate after pollution is only 20.41%, and the flux recovery rate after 40 DEG C warm water cleaning is as high as 93.02%;After being treated in 1000 mg / L sodium hypochlorite solution for 4 hours, the water flux changes only by 17.22%, and the rejection rate changes only by 0.21%, ensuring the durability of membrane performance.

The application discloses a kind of hydroxyl aluminum oxide-based alkaline electrolytic water composite diaphragm and preparation method thereof, belong to diaphragm preparation technical field, the diaphragm is composed of polysulfone, polyvinylpyrrolidone, quaternary ammonium polyvinyl alcohol, gamma-AlOOH powder, by the introduction of gamma-AlOOH powder can significantly reduce surface resistance, enhance gas resistance, improve mechanical strength and dimensional stability, improve thermal stability and chemical stability, by quaternary ammonium modification can significantly enhance the permanent hydrophilicity of diaphragm, improve diaphragm ion conduction efficiency.

The application discloses an enhanced polytetrafluoroethylene composite framework structure composite material and a preparation method thereof. The material is composed of polysulfone modified polytetrafluoroethylene resin, carbon fiber, molybdenum disulfide, a reactive silicone resin precursor and a platinum catalyst, a continuous three-dimensional siloxane network is constructed in situ at the interface through a silicon hydrogen addition cross-linking, and a multi-scale reinforced framework structure is formed in cooperation with the carbon fiber. The material has excellent mechanical properties, creep resistance and wear resistance, and is suitable for high-performance sealing and wear-resistant fields.

A membrane for an electrochemical device is disclosed. The membrane comprises a sulfonated polysulfone polymer cation exchange membrane. An electrochemical device is also disclosed, comprising a negative electrode, a positive electrode, a membrane separating the negative and positive electrodes, and an electrolyte.

The utility model provides a kind of composite diaphragm, the composite diaphragm includes substrate and the coating layer being arranged in the substrate at least one surface;The substrate includes mesh base and the composite coating layer being arranged in the mesh base at least one side, the composite coating layer includes inorganic particle and the composite coating layer formed by at least one polymer in polysulfone, polyethersulfone or poly aryl sulfone;The coating layer includes first coating layer and second coating layer sequentially arranged, the first coating layer is close to substrate one side;The first coating layer is the coating layer formed by polymer microsphere in substrate surface dot distribution;The second coating layer includes anion transport function layer.The bubble point of the composite diaphragm is high, and the air isolation performance is good, and it can also ensure good ion transport performance, stability, and can also operate under higher pressure, reduce power consumption and cost.

This application discloses a nanofiltration membrane and its preparation method. The nanofiltration membrane consists of a porous polysulfone-based ultrafiltration membrane, an organic ligand-metal coordination interlayer, and a polysulfonamide separation layer. The organic ligand-metal coordination interlayer is disposed on the surface of the porous polysulfone-based ultrafiltration membrane, and the polysulfonamide separation layer is disposed on the surface of the organic ligand-metal coordination interlayer. The nanofiltration membrane prepared in this application exhibits excellent acid resistance, high water flux, high rejection rate, and long-term stability. After operating in an H₂SO₄ solution at pH=2 for 500 hours, the rejection rate remains above 95%, and the flux decline is less than 5%, making it particularly suitable for separation processes in strongly acidic environments.

The application refers to Fe-Ni / polysulfone inorganic-organic hollow fiber hybrid membrane and a preparation method thereof, including a preparation process: step 1: dissolving polysulfone in an organic solvent and adding an additive, stirring to form a uniform solution; then adding 0.5% to 30% of Fe and Ni metal powder by mass ratio under stirring to obtain a spinning solution; step 2: mixing pure water and a polar solvent according to a certain ratio to form a uniform solution, obtaining an inner coagulation bath; step 3: transferring the spinning solution to a liquid supply tank after vacuum degassing, quantitatively and constantly conveying to a spinneret, at the same time, quantitatively and constantly conveying the inner coagulation bath into the spinneret, the spinning solution passing through an air gap and entering an outer coagulation bath, the hollow fiber membrane being coagulated and formed under the action of the inner / outer coagulation bath, being washed by pure water and dried to obtain the Fe-Ni / polysulfone hollow fiber membrane, which has a typical asymmetric structure, high mechanical strength and good biocompatibility, can significantly improve the hydrophilicity of the membrane and can also enhance the protein contamination resistance of the membrane.

The application discloses a kind of hydrolysis-resistant polyamide molding materials and preparation method and application thereof, belong to high polymer material technical field.The hydrolysis-resistant polyamide molding material includes the following raw materials by mass fraction:PA6T / PA66 copolyamide 100 parts, modified short glass fiber 10-30 parts, modified polysulfone 15-25 parts, ethylene-maleic anhydride copolymer 1-5 parts, functional additives 1-5 parts.The modified polysulfone is polysulfone and acryloyl chloride are subjected to Fu-Ker acylation reaction in benzene ring side chain and branched chain containing carbon-carbon double bond and carbonyl group.The application replaces traditional pure PA66 with PA6T / PA66 copolyamide, and adds modified short glass fiber and modified polysulfone in the matrix material of polyamide, using molecular level crosslinking structure to make material keep structural stability under long-term high temperature and high humidity conditions, and the molding material prepared has excellent long-term high-temperature hydrolysis resistance.

The application discloses a preparation method of a surface-coated titanium dioxide polysulfone modified membrane, and belongs to the technical field of water treatment. The preparation method of the surface-coated titanium dioxide polysulfone ultrafiltration membrane specifically comprises the following steps: (1) dopamine-coated polysulfone flat membrane: dopamine is dissolved in a Tris-HCl buffer solution to obtain a dopamine buffer solution, and polysulfone flat membrane is soaked in the dopamine buffer solution to obtain dopamine-coated flat membrane; (2) TiO2 is dissolved in a methanol solution to obtain TiO2 suspension, and the dopamine-coated flat membrane is soaked in the TiO2 suspension to obtain TiO2 surface-coated flat membrane. The preparation method of the surface-coated titanium dioxide polysulfone flat membrane has simple preparation process and low raw material price. The modified membrane has good water treatment effect, can effectively reduce organic matters in water, can effectively reduce membrane pollution, and can prolong the service life of the membrane.

A method of making high-performance thin-film composite (TFC) nanofiltration (NF) membrane, comprising a polysulfone (PSf) or polyethersulfone (PES) support membrane layer and a selective layer that comprises a modified polypiprazine-amide nanofiltration (NF) membrane for separation of lithium from magnesium / lithium and brine solution. The method comprising: i) preparing a polysulfone (PSf) or polyethersulfone (PES) support membrane by using a non-solvent induced phase separation (NIPS) technique; (ii) contacting the formed support membrane with an aqueous diamine solution comprising 0.1-3% w / v piperazine, and 0.5-2.0% w / v NaOH, for a time period of 60-120 seconds; (iii) removing excess aqueous diamine solution from the support surface; (iv) gently pouring an organic solution containing 0.15% w / v TMC on the support surface and initiating an interfacial polymerization (IP) reaction; (v) draining the organic solution from the support surface and heat-curing the formed thin film composite (TFC) at about 80° C. for about 5 minutes; and (vi) washing the final thin-film composite (TFC) nanofiltration (NF) membrane.

The application discloses a kind of high stability chiral perovskite / polysulfone composite material and preparation method thereof, belong to polymer composite material and chiral separation purification technical field, for chiral perovskite in aqueous solution easy degradation, site is embedded and lead leakage and other problems, phosphotungstic acid and 3-amino propyl triethoxysilane are introduced in casting solution in the application.By phase inversion in-situ crystallization process, chiral perovskite crystal is generated in the "rigid and soft double network" protection of polysulfone pore wall co-assembly.Phosphotungstic acid constructs rigid shielding layer and micro electric field, and silane forms flexible anchoring network.The application effectively overcomes crystal agglomeration and aqueous solution instability defects, locks free heavy metal while breaking the game effect, greatly improving separation flux and selectivity, and has great industrial application prospect.

The invention discloses high-performance epoxy resin and a preparation method thereof, and belongs to the technical field of high polymer materials, the high-performance epoxy resin is composed of epoxy resin, a curing agent and a modifier PSF-DOPO, and a DOPO structural unit in the modifier PSF-DOPO is chemically bonded on a main chain of polysulfone through a P-C bond. The method comprises the following steps: firstly, synthesizing a Schiff base monomer ESI; secondly, synthesizing novel polysulfone PSF; thirdly, dissolving DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and PSF (Phosphorus Sulfonate Factor), and then reacting to obtain And finally, preparing the epoxy resin composite material. The material has high toughness and high strength and is prepared by physically blending the epoxy resin prepolymer and the modifier, the PSF-DOPO multifunctional polymer modifier is used for synchronous toughening and flame-retardant modification of epoxy resin, the mechanical property of the obtained material is comprehensively and remarkably improved, and the material also has excellent intrinsic flame retardance and is durable and stable in performance; the material has wide application prospects in the fields of aerospace structural members, high-end electronic packaging, high-performance composite materials and the like which require high mechanical properties and excellent flame retardance.