341 results about "Polysulfone" patented technology

The invention relates to the technical field of reverse osmosis membrane supports, in particular to a polyester non-woven fabric and a preparation method and application thereof.The preparation method comprises the steps that S1, polyester main body fibers and polyester adhesive fibers are used as raw materials to prepare high-quantitation original cloth M0 and low-quantitation original cloth H0; carrying out hot pressing pretreatment on the H0 to obtain a product H0 '; s2, overlapping and hot-pressing M0 and H0 'to obtain a composite non-woven fabric M1H1; s3, the M1H1 is impregnated with a functional solution, and the functional solution contains para-aramid nanofibers and nano calcium carbonate modified by hexadecyl trimethyl ammonium bromide; and then carrying out cold pressing on the composite non-woven fabric impregnated with the functional solution to obtain the nano-material modified composite non-woven fabric. And S4, carrying out secondary hot pressing treatment to obtain the polyester non-woven fabric. The polyester non-woven fabric can effectively avoid the problems of excessive curling, excessive permeation of a polysulfone solution and the like during curing after being coated with polysulfone, and is more beneficial to application in a reverse osmosis membrane.

This disclosure relates to the fabrication of high-performance thin film composite (TFC) reverse osmosis (RO) membranes comprising a thin polyamide rejection layer (thickness of 100-200 nanometer), a porous substrate including polysulfone (PSf) layer (thickness of 40-50 micron) cast on polyester nonwoven fabric (thickness of ˜100 micron). Hydrophilic and antibacterial TFC polyamide RO membranes were developed by incorporating green Lignin and nanostructured silver-based metal organic frameworks (MOFs) into the selective layer. The polyamide layer of TFC RO membranes was fabricated on the porous PSf substrate by interfacial polymerization between aqueous monomer solutions containing MPD, and adequate additives in water and organic monomer solutions containing TMC in the mixture of hexane and co-solvents. The optimized produced RO membranes were provided water flux of 95-100 LMH and sodium chloride (NaCl) salt rejection of 98.5-99.0% during filtration of 2000 ppm NaCl solution at 225 psi pressure, and water flux of 55-60 LMH and sodium chloride (NaCl) salt rejection of 98.6-98.9% during filtration of 35000 ppm NaCl solution at 800 psi pressure. This disclosure also relates to developing a roll-to-roll PSf membrane as a substrate for making TFC RO membranes for water desalination

A membrane includes a polysulfone-based support, a polydopamine (PDA) layer disposed on a surface of the polysulfone-based support, and a silver / polydopamine (Ag / PDA) composite layer disposed on a surface of the polydopamine layer. The polysulfone-based support has a pore size of up to 600 nanometers (nm). The Ag / PDA composite layer contains core-shell structure particles and spherical particles. The core-shell structure particles have a silver nanoparticle core and a polydopamine shell. The spherical particles are silver-decorated polydopamine particles. The membrane can at least partially separate an Erichrome Black T (EBT) dye from an EBT dye / salt containing mixture by rejecting the EBT dye and allowing the EBT dye / salt containing mixture to pass through the membrane.

The invention belongs to the technical field of membrane separation, and particularly relates to a low-pressure high-flux polyamide / polysulfone hollow fiber composite nanofiltration membrane and a preparation method thereof. The preparation method of the composite nanofiltration membrane comprises the following steps: dissolving sulfonated polysulfone, poly (1-vinyl-3-butylimidazole) bromide and polyvinylpyrrolidone to prepare a spinning solution, and spinning to obtain a base membrane; carrying out hydrophilic modification on the base membrane by using 1, 3-propane sultone; then, an aqueous phase solution containing poly (gamma-glutamic acid) and triethylene tetramine and an organic phase solution containing trimesoyl chloride and 3, 5-diaminobenzoic acid are subjected to interfacial polymerization in the inner cavity of the modified base membrane to form a polyamide separation layer; and finally, carrying out heat treatment to obtain the composite nanofiltration membrane. Through the synergistic effect of zwitterionic ionization of the base membrane and biomacromolecule construction of the separation layer, the mass transfer resistance of water is remarkably reduced, unification of high flux and high selectivity is achieved, and good structural stability is achieved.

The invention relates to a reverse osmosis membrane and a preparation method thereof, and the preparation method comprises the following steps: immersing a polysulfone-based membrane into a dopamine-containing mixed solution, and carrying out constant-temperature oscillation to form a dopamine pretreatment layer so as to obtain a modified base membrane; dissolving rosmarinic acid ester modified m-phenylenediamine, piperazine, a surfactant, an auxiliary agent and a pH regulator in water, and stirring for dissolving to obtain a water phase solution; dissolving an acyl chloride monomer in an organic solvent, stirring and dissolving, then adding the modified titanium dioxide, and carrying out ultrasonic dispersion to obtain an oil phase solution; immersing the modified base membrane into the water phase solution, taking out the modified base membrane, immersing the modified base membrane into the oil phase solution, taking out the modified base membrane and drying the modified base membrane to obtain a pre-compounded reverse osmosis membrane; and carrying out post-treatment on the pre-compounded reverse osmosis membrane to obtain the reverse osmosis membrane. Under the condition that the water yield is guaranteed, the reverse osmosis membrane disclosed by the invention has a high desalination rate and the oxidation resistance of the reverse osmosis membrane is improved for a long time.

The application belongs to the technical field of porous adsorption membrane materials, and discloses a titanium lithium ion porous adsorption membrane material and a self-assembly preparation method and application thereof. The preparation method comprises the following steps: dissolving a film-forming polymer in a dispersion liquid containing MXene nanosheets to form a uniform precursor liquid; the MXene nanosheet is a carbide, nitride or carbonitride of a transition metal with a single-layer structure; dispersing a titanium lithium composite oxide in the precursor liquid to form a casting solution; coating the casting solution on a support, and then performing phase inversion by using pure water to obtain a matrix film; placing the matrix film in a lithium elution liquid for immersion washing, replacing lithium ions in the matrix film, and causing a self-assembly reaction of the titanium lithium composite oxide in the matrix film, so that the titanium lithium ion porous adsorption membrane material is obtained. The application innovatively introduces MXene nanosheets and a polysulfone matrix film, fixes the MXene nanosheets on the polysulfone matrix film as an in-situ growth substrate of the titanium lithium composite oxide, and the obtained membrane material has a high adsorption capacity.

The invention discloses cyano-terminated modified polysulfone and a preparation method thereof. The terminal cyano group is selected from at least one of the following groups: n, m, p, q and r are independently 0 or 1; r1, R2, R3 and R4 are respectively and independently selected from any one of H, methyl, trifluoromethyl and cyano. Through molecular structure design, a polar group (cyano) with large dipole moment is introduced into the end group of polysulfone to prepare the cyano-terminated modified polysulfone and the film thereof. According to the polysulfone provided by the invention, the cyano group at the chain end has a relatively large degree of freedom, and when the cyano group is subjected to sub-Tg polarization, the steric hindrance is relatively small. Therefore, the cyano-terminated modified polysulfone can maintain relatively low dielectric loss and high Tg while increasing the dielectric constant.

The invention discloses a hydrophobic gas diffusion electrode loaded with silver nanoparticles and application of the hydrophobic gas diffusion electrode in electrocatalytic carbon dioxide reduction, and belongs to the technical field of electrocatalysis. The hydrophobic gas diffusion electrode comprises a gas diffusion layer and a catalyst layer sprayed on the gas diffusion layer; the catalyst layer comprises a silver nanoparticle catalytic material, a first ionomer and a second ionomer; wherein the first ionomer is a fluororesin ionomer, and the second ionomer is a quaternized polysulfone ionomer. A system for preparing CO by reducing CO2 through electro-catalysis is constructed, the system comprises an MEA electrolytic cell, a cathode, an anode and an anion exchange membrane, and the cathode adopts the hydrophobic gas diffusion electrode loaded with the silver nanoparticles. The preparation method is mild in preparation condition and environmentally friendly, the modified hydrophobic gas diffusion electrode has high hydrophobicity, efficient conversion of CO2 can be achieved under the high current density, FECO can reach 96.5% under the high current density, and excellent catalytic performance is shown.

The invention discloses a preparation method of an organic-inorganic composite microcapsule as well as an obtained product and application of the organic-inorganic composite microcapsule. The preparation method comprises the following steps: firstly, preparing a MoS2-metal composite material by adopting pulse laser irradiation, mixing the MoS2-metal composite material, PAO5 oil, polysulfone and an organic solvent to obtain an organic phase, and dissolving lauryl sodium sulfate and polyvinyl alcohol in water to obtain a water phase; and mixing the organic phase and the water phase, and obtaining the microcapsule by adopting a solvent evaporation method. The method disclosed by the invention is simple to operate and low in cost, and the obtained microcapsule can automatically store a lubricant and has excellent tribological performance in the friction process.

The invention relates to a method for synergistically regulating and controlling the aperture of a material separation membrane based on electric field-vacuum heating, which comprises the following steps: S1, uniformly mixing polysulfone, an additive and a solvent, and preparing a supporting layer membrane casting solution; s2, coating the surface of a polyolefin-based microfiltration membrane with the supporting layer membrane casting solution obtained in the step S1, and preparing a polysulfone ultrafiltration base membrane through immersion precipitation phase inversion; s3, uniformly mixing sulfonated polysulfone, N, N-dimethylformamide, ethylene glycol monomethyl ether and a pore-preserving agent to prepare a sulfonated polysulfone separation layer membrane casting solution; and S4, coating the surface of the polysulfone ultrafiltration base membrane obtained in the step S2 with the sulfonated polysulfone separation layer membrane casting solution obtained in the step S3, applying a direct-current electric field perpendicular to the surface of the membrane, and simultaneously performing vacuum heating to obtain the material separation membrane. An electric field and vacuum heating synergistic technology is adopted to induce oriented arrangement of sulfonated polysulfone to form an ordered structure, the membrane pore size and the membrane structure consistency are accurately controlled, and the membrane permeation flux and separation selectivity are optimized.

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 invention provides a multi-electric-layer nanofiltration membrane for extracting lithium from a salt lake and a preparation method of the multi-electric-layer nanofiltration membrane, and belongs to the technical field of nanofiltration membranes. Firstly, polysulfone and dimethylformamide are put into a mixing kettle, and a membrane casting solution is obtained; coating a non-woven fabric with the membrane casting solution, and then preparing a non-woven fabric and polysulfone combined base membrane through phase inversion; soaking the base membrane in an isopropanol solution, and removing redundant solution on the surface by using a rubber roller; the preparation method comprises the following steps: coating the surface of a base membrane with a solution of a water phase 2, then removing the redundant water phase on the surface, then coating the surface with an oil phase 2, drying a membrane, sequentially and repeatedly coating the membrane with the water phase 2 and the oil phase 2 for multiple times to obtain a nanofiltration membrane with multiple middle layers, then coating the membrane with a solution of a water phase 1, removing the redundant water phase on the surface, then coating the surface with an oil phase 1, and drying to obtain the nanofiltration membrane with multiple electric layers. According to the invention, a plurality of middle layers are positively charged, so that the electrostatic repulsion effect on magnesium ions can be fully exerted, and the magnesium ion interception is obviously improved.

This invention relates to the field of gas separation membrane material preparation, and discloses a CO2 separation mixed matrix composite membrane and its preparation method. The method includes: mixing an amino-containing MOF, a bridging ligand, a first solvent, and an optional first catalyst and carrying out a first reaction; separating a solid product from the first reaction product to obtain a pre-modified solid; mixing the pre-modified solid, a portion of an amino polymer, a second solvent, and an optional second catalyst and carrying out a second reaction; separating a solid product from the second reaction product to obtain a modified MOF; mixing the modified MOF with water to obtain a mixture; then mixing the mixture with another portion of an amino polymer and coating it onto a polysulfone ultrafiltration membrane containing a silicone rubber interlayer. The CO2 separation mixed matrix membrane exhibits significant wetting between particles and the amino polymer, without generating interfacial defects, and has a high MOF loading, resulting in excellent carbon dioxide separation performance.

The application discloses a low-shrinkage polyester shrink film for labels, which adopts a three-layer co-extrusion structure and comprises an A-layer surface layer, a B-layer core layer and a C-layer bottom layer; the A-layer and the C-layer are arranged on the two sides of the B-layer and are both made of common PETG film; the B-layer is made of PETG shrink film functional master batch chips, hydroxyethyl cellulose and polysulfone; the total weight of the PETG shrink film functional master batch chips, the hydroxyethyl cellulose and the polysulfone is 100 wt%; the adding amount of the PETG shrink film functional master batch chips is 90 wt% to 95 wt%; the adding amount of the hydroxyethyl cellulose is 1 wt% to 3 wt%; and the rest is the polysulfone. The application further discloses a preparation method of the shrink film. After a small amount of hydroxyethyl cellulose and polysulfone are added into the PETG shrink film functional master batch of the core layer, the shrinkage of the shrink film can be obviously reduced, the shrinkage rate is relatively high, and the shrinkage temperature is relatively low; the improved shrink film is especially suitable for being used as a label with low shrinkage; and in post-processing and use, the improved shrink film is beneficial to improving the product yield.

The invention relates to the technical field of membrane materials, in particular to a reverse osmosis membrane, a preparation method and application. The reverse osmosis membrane is prepared by the preparation method. The preparation method comprises the following steps: paving a prepared polysulfone support layer on a carrier containing a water layer, and standing to obtain the water-saturated polysulfone support layer; uniformly coating a water-phase solution on one surface, deviating from the carrier, of the water-absorbing saturated polysulfone supporting layer, then removing the redundant water-phase solution on the polysulfone supporting layer, uniformly coating an oil-phase solution, and then removing the redundant oil-phase solution on the polysulfone supporting layer, so as to obtain the polysulfone carrier. Carrying out interface reaction on the oil phase solution and the water phase solution to obtain a nascent state reverse osmosis membrane containing a polyamide separation layer; and performing post-treatment on the nascent state reverse osmosis membrane to obtain a finished product reverse osmosis membrane. The application refers to the application of the reverse osmosis membrane in seawater desalination. The preparation method can be used for preparing the reverse osmosis membrane with high desalination rate and high water flux.

The application discloses a high-desalination anti-pollution reverse osmosis membrane and a preparation method and application thereof. The reverse osmosis membrane comprises a non-woven fabric layer, a polysulfone support layer, an ethylenediamine cyclen organic cage intermediate layer and a polyamide separation functional layer which are arranged in a stack, wherein the reverse osmosis membrane comprising the ethylenediamine cyclen organic cage intermediate layer has obvious improvements in permeation flux, desalination rate and pollution cleaning recovery performance. The prepared reverse osmosis membrane has excellent pollution cleaning recovery performance on the basis of high desalination.

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.

The application discloses a kind of polymer porous membrane, its preparation method and application in turbidity removal pre-filtering, belong to the technical field of porous membrane preparation.Its technical scheme includes: when the non-solvent phase separation of film-forming polymer solution occurs and the separation layer is formed on the outer surface of polymer membrane, simultaneously, water-soluble coating layer polymer solution is coated on the surface of separation layer, to obtain polymer porous membrane;Film-forming polymer solution uses polysulfone polymer as film-forming base material, uses water-soluble chloride as porogen, uses nitrogen-containing organic matter as solvent;Coating layer polymer solution has porogen effect, and viscosity is 200-1000 mPa·s.The application is applied to turbidity removal pre-filtering, solves the technical problems that existing non-solvent phase separation technology is difficult to obtain large aperture, surface opening rate is high and easy to appear finger-shaped hole, has the characteristics of large aperture, surface opening rate is high, cross section is sponge hole.

The application belongs to the technical field of new material household water purification separation membrane, and particularly relates to a pump-free household nanofiltration membrane and a preparation method thereof. A blended casting solution of polyether sulfone and polysulfone is embedded into the reverse layer of non-woven fabric to form a rough base membrane layer, and then the base membrane layer is shaped through an oven with a temperature of 50 DEG C, and then is subjected to three-phase (water phase, amphiphilic phase and oil phase) interfacial polymerization, and finally is subjected to post-treatment and shaping again, so that a membrane with a screening function capable of selectively separating monovalent ions and divalent ions is obtained, and the household nanofiltration membrane with satisfactory water output under the condition of no pump is prepared.

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.]

The invention relates to the technical field of environmental protection, and discloses a preparation process of a hydrophilic modified polysulfone fiber membrane, which comprises the following steps: carrying out click reaction on azido polysulfone and an alkynyl quaternary ammonium salt intermediate to obtain polysulfone containing triazole, hydroxyl and quaternary ammonium salt functional groups, and spinning by a dry-wet spinning method to obtain the hydrophilic modified polysulfone fiber membrane. Hydrophilic ether bonds, hydroxyl groups and quaternary ammonium salt groups are introduced, so that the surface hydrophilicity of the polysulfone fiber membrane is remarkably improved; triazole and hydroxyl groups contained in the polysulfone fiber membrane can form coordinate bonds with Hg < 2 + >, so that a very good chelating adsorption effect is achieved, and the adsorption performance and the adsorption capacity of the polysulfone fiber membrane on the Hg < 2 + > are improved. Meanwhile, the polysulfone fiber membrane contains a cationic quaternary ammonium salt group which can form good electrostatic interaction with Cr2O7 < 2->, so that the adsorption performance and the adsorption capacity of the polysulfone fiber membrane on the Cr2O7 < 2-> are further improved.

The invention relates to the technical field of power distribution cabinet systems, in particular to an intelligent heat dissipation power distribution cabinet system of an anti-impact composite material, which comprises a cabinet body, an intelligent heat dissipation module, a temperature monitoring module, a fault early warning module and a control module, the power distribution cabinet system further comprises a heat dissipation and dehumidification cooperative control sub-module, an intelligent energy consumption management sub-module and an electric arc detection and fire extinguishing linkage sub-module. According to the intelligent heat dissipation power distribution cabinet system of the impact-resistant composite material, the cabinet body is made of a polysulfone material, a plurality of adjustable partition plates made of the polysulfone material are arranged in the cabinet body, the cabinet body, the partition plates and the heat dissipation pipeline are arranged in the cabinet body, each module shell is made of the polysulfone material, and the polysulfone material can integrally enhance the capacity of the power distribution cabinet for resisting impact such as external collision and vibration; in cooperation with a self-adaptive buffer protection structure composed of a polysulfone elastic buffer pad and a memory alloy spring, impact energy can be further absorbed, the risk that internal electrical elements are damaged due to impact is reduced, the service life of the power distribution cabinet is prolonged, and the operation reliability of the power distribution cabinet is improved.

The invention relates to the technical field of reverse osmosis membranes, in particular to a reverse osmosis membrane as well as a preparation method and application thereof. The reverse osmosis membrane comprises a polysulfone supporting layer; the aromatic polyamide separation layer is formed on the surface of the polysulfone supporting layer and is formed through an interfacial polymerization reaction of m-phenylenediamine and trimesoyl chloride; the surface of the aromatic polyamide separation layer is coated with the composite modified layer, and the composite modified layer comprises modified nano-hydroxyapatite, a zwitterionic polymer, an antioxidant, nano-silica and a quaternary ammonium salt functionalized silane coupling agent. The reverse osmosis membrane structure improves the hydrophilicity and the surface charge characteristic of the membrane, and enhances the pollution resistance, the antibacterial property and the separation performance of the membrane. The aromatic polyamide separation layer formed through interfacial polymerization has desalting capacity, and the composite modification layer improves the interception efficiency of colloidal particles and has good cleaning regeneration capacity and long-term operation stability.

The application relates to the technical field of aluminum alloys, in particular to a high-strength corrosion-resistant aluminum material and a preparation method thereof. Raw materials such as a chitosan corrosion inhibitor, an amino acid corrosion inhibitor, a polysulfone and a lignosulfonate are mixed to obtain a microcapsule corrosion inhibitor; the microcapsule corrosion inhibitor is added into a dopamine solution to obtain a dopamine microcapsule corrosion inhibitor through stirring reaction. The dopamine microcapsule corrosion inhibitor and a curing agent are added into an epoxy resin to obtain an epoxy resin paint; the epoxy resin paint is coated on the surface of pretreated aluminum profiles to obtain a finished product. The finished product prepared by the application has good corrosion resistance, durability and crack resistance, so the application has a wide application prospect in the technical field of aluminum alloys.

The invention discloses a multi-polymer composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The multi-polymer composite material comprises the following components in parts by mass: 30-70 parts of a polymer A, 20-40 parts of a polymer B and 10-30 parts of a polymer C. According to the invention, three different polymers are compounded to prepare the multi-polymer composite material; wherein the polymer A comprises at least one of polyamide, polylactic acid and polyformaldehyde, serves as a structural framework and provides mechanical strength; the polymer A comprises at least one of thermoplastic polyurethane, ethylene-vinyl acetate copolymer and polycaprolactone, the polymer B comprises at least one of thermoplastic polyurethane, ethylene-vinyl acetate copolymer and polycaprolactone, the polymer C comprises at least one of polyether-ether-ketone and polysulfone, and the polymer B, the polymer C and the polymer A are compounded, so that the mechanical property of the multi-polymer composite material can be ensured, and the mechanical property of the multi-polymer composite material can be improved. And the processability of the multi-polymer composite material is improved.

A membrane for active CO2 pumping and method for making the same is disclosed. The membrane includes a first polymer that is hydrophobic and unfunctionalized, and a second polymer having DAC functionalities. The membrane has a charged functionality gradient extending between two compositions. CO2 is pumped continuously through the membrane by the charged functionality gradient when a moisture gradient is maintained across the membrane such that one side is drier than the other. The method for making the membrane includes dissolving the first and second polymers into first and second solutions, respectively, which are applied to a substrate as sprays to form first and second layers and a plurality of layers in between, while modifying a flow rate for the first and second solutions such that the layers together form the charged functionality gradient. The first and second polymers may be Udel polysulfone and PAES-co-QAPAES(50)[I], respectively.

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 discloses an impact-resistant high-thermal-conductivity polyphenylene sulfide composite material and a preparation method thereof, and relates to the technical field of plastic processing. The preparation method comprises the following steps: S1, preparation of a highly oriented PPS fiber insert; and S2, preparation of the impact-resistant high-thermal-conductivity PPS composite material. The application provides an impact-resistant high-thermal-conductivity PPS composite material and a preparation method thereof. Firstly, the viscoelasticity of PPS resin is improved by using high-melt-viscosity and high-temperature-resistant aromatic polyamide, the interfacial compatibility of PPS / aromatic polyamide is enhanced by using a functionalized polysulfone-based resin as a compatibilizer, so that the stretchability and the tensile orientation degree of PPS are improved; PPS composite fibers are obtained by using a melt spinning machine, and a fiber solid-phase high-multiple-stretching-annealing forming process is established, so that the high-toughness and highly oriented PPS composite fiber material is obtained.

To generate a recycled material of higher quality from hollow fibers.SOLUTION: A hollow fiber processing system performing a reproduction processing of hollow fibers containing polyvinylpyrrolidone comprises: a shredding device which shreds hollow fibers; a kneader which adds 0.03 to 1 pts.wt. of a compound having a phosphite structure and a hindered phenol structure in the same molecule to 0.2 to 5 pts.wt. of polyvinylpyrrolidone contained in the hollow fibers; and a granulator which forms pellets from hollow fiber chips to which the compound was added by the kneader.SELECTED DRAWING: Figure 1