266 results about "Polyether sulphone" patented technology

The invention belongs to the technical field of membrane separation, and particularly relates to a method for preparing a high-flux hollow fiber nanofiltration membrane based on interfacial polymerization, the obtained membrane and application. The method comprises the following steps: firstly, carrying out pre-adsorption treatment on a polyethersulfone hollow fiber ultrafiltration base membrane through a polyethyleneimine aqueous solution to form a reactive anchoring layer; then sequentially dipping in an aqueous phase solution containing piperazine, sodium phytate and nanoscale cellulose whiskers and an organic phase solution containing trimesoyl chloride and 5-isocyanate isopeptide acyl chloride for interfacial polymerization; and finally, carrying out heat treatment on the obtained primary composite membrane, and completing a gas-phase cross-linking reaction in a glutaraldehyde steam atmosphere. According to the method, the hollow fiber nanofiltration membrane with high flux, high selectivity, excellent chlorine resistance and pollution resistance is successfully prepared through a multi-stage strengthening process, and the hollow fiber nanofiltration membrane is suitable for the fields of drinking water purification, industrial wastewater reuse, material separation and the like.

The invention relates to the technical field of polyamide nanofiltration membranes, in particular to an acid and alkali resistant high-strength nanofiltration membrane and a preparation method thereof. The problem that the strength and the acid and alkali resistance of a polyamide nanofiltration membrane in the prior art cannot be considered at the same time is solved. The base membrane material of the polyamide nanofiltration membrane is modified polyethersulfone and is obtained by chemically bonding a carbon nanotube subjected to double surface modification by titanium dioxide sol-gel and a KH550 coupling agent in a polyester non-woven fabric, and the modulus of the material is improved by utilizing an inorganic-organic hybrid network; the functional layer of the polyamide nanofiltration membrane is made of modified polyamide, and the modified polyamide functional layer is formed by forming a polyamide matrix through polymerization reaction of 2, 2 '-disulfonic acid-4, 4'-diaminobiphenyl, piperazine and trimesoyl chloride and introducing 4-amino-2, 2, 6, 7-tetramethyl-1, 3-pentanediol at the same time. And the chemical resistance is improved by a free radical capturing group generated by 2, 2, 6, 6-tetramethylpiperidine and octa-isobutyl cage type silsesquioxane.

The invention discloses an organic micromolecule modified polyethersulfone composite dielectric film and a preparation method and application thereof, and belongs to the technical field of functional polymer composite materials and preparation thereof. The problems that an existing PESU-based dielectric film is insufficient in energy storage density and low in charging and discharging efficiency are solved. According to the PESU-based dielectric film, PMDA is doped in a PESU substrate through a blending process, the stacking and polarization characteristics of polymer chain segments are improved on the molecular level by means of the doping of PMDA, and the charge-discharge efficiency, the energy storage density and the breakdown field strength of the PESU-based dielectric film are remarkably improved while the excellent mechanical property of the PESU substrate is kept. Test results show that the obtained composite film achieves energy density of 8.6 J / cm < 3 > and energy storage efficiency of 67.0% under the field intensity of 560 kV / mm.

The application provides a virus-removing polyether sulfone porous membrane and a preparation method thereof. The virus-removing polyether sulfone porous membrane comprises, in sequence along a thickness direction, an outer layer region and an inner layer region, wherein the average pore size of the outer layer region is 10-20 nm, the thickness of the outer layer region is 20-50 microns, the average pore size of the inner layer region is 5-10 microns, and the thickness of the inner layer region is 60-150 microns; and the virus-removing polyether sulfone porous membrane is prepared by a method comprising at least the following process: taking polyether sulfone as a raw material, and obtaining the virus-removing polyether sulfone porous membrane under the action of a water-soluble diluent and a hydrophilic additive; wherein the water-soluble diluent comprises ethylene carbonate and polyethylene glycol. The virus-removing polyether sulfone porous membrane has a high virus removal rate and a high protein permeation rate.

The application discloses a filter core material and a preparation method thereof, and belongs to the technical field of water purification filter cores. The filter core material comprises the following components in percentage by mass: a honeycomb support matrix: 15-60%; a filter substrate: 30-40%; and a coating substrate: 0-50%. The filter core material and the preparation method thereof maintain a stable support structure during the preparation of a gamma-Al2O3 / BN composite ceramic layer through polypropylene and cellulose nanofiber. The filter substrate is obtained through gradient low-temperature sintering, effectively removes small particles and pollutants in water, and has excellent filtering performance. The active carbon fiber and polyether sulfone are coated on the filter substrate through electrospinning, which ensures good filtering performance and water permeability, improves the wear resistance and compressive strength of the filter core, and removes the honeycomb support matrix through high-temperature combustion, further improves the water permeability, and the active carbon fiber is physically activated during the combustion process, further improving the adsorption capacity.

The invention relates to polyethersulfones which can be used as engineering thermoplastics and also as polymers suitable for use in membrane technologies. A method for producing a polyethersulfone includes carrying out a nucleophilic polycondensation between 4,4'dioxydiphenyl sulfone and 4,4'dichlorodiphenyl sulfone in the presence of potassium carbonate in an aprotic solvent environment in two steps of: a) obtaining a dipotassium salt of 4,4'dioxydiphenyl sulfone and b) adding 4,4'dichlorodiphenyl sulfone to the salt obtained in the first step, then holding the resulting mixture while controlling the viscosity thereof to provide a mixture containing a polyethersulfone in a dissolved form in which the mass fraction of the polymer is from 50.5 to 53.3%, isolating the polyethersulfone and drying same. The invention makes it possible to produce a high-molecular-weight polyethersulfone having a controlled set mass-average molecular mass of from 85340 to 104300 g / mol, rendering the polymer suitable for use in the production of finished articles.

The application belongs to the field of high dielectric constant (ε r ), low dielectric loss (tan delta) composite dielectric material, and particularly relates to a preparation method of a modified polyether sulfone / polyether imide polymer alloy. g Polymer polyether imide is blended, the mixture is added into DMAc at a solid content of 15%-20%, is stirred and dissolved at 80 DEG C, then a thin film is prepared on a glass plate by using a scraping coating method, finally the glass plate is transferred to a vacuum oven, is kept at 55 DEG C overnight, is kept at 100 DEG C for 3-5 hours, and is cured at 180 DEG C for 3-5 hours, thereby a blended film is prepared, wherein the mass fraction of the modified polyether sulfone in the mixture is 1wt%-30wt%. The modified polyaryl ether sulfone polymer segment with a side chain branched large dipole moment polar group is used as an organic filler, a small amount of addition can greatly reduce the dielectric loss, the operation is simple, the spectrum is good, and the influence on T g is very small, and the dispersion and interface problems of inorganic fillers are avoided.

The application provides a boron nitride nanosheet-doped polyamide composite nanofiltration membrane and a preparation method. The method uniformly disperses boron nitride nanosheets in deionized water, and then uniformly mixes the boron nitride nanosheets with a piperazine aqueous solution. The mass ratio of the boron nitride nanosheets to the piperazine is (5.01-20.04):(60-200), and a mixed solution is obtained. The mixed solution is vacuum filtered on a polyether sulfone ultrafiltration membrane, and the polyether sulfone ultrafiltration membrane is left with a mixture of uniformly dispersed boron nitride nanosheets and piperazine. A triformylchloride solution is poured on the mixture of the boron nitride nanosheets and the piperazine. The mass ratio of the boron nitride nanosheets to the triformylchloride is (5.01-20.04):100. The triformylchloride and the piperazine are interfacially polymerized on the surface of the polyether sulfone ultrafiltration membrane. The solvent of the triformylchloride solution is then poured off. After drying, a boron nitride nanosheet-doped polyamide composite nanofiltration membrane is obtained, and the permeation flux and the antifouling property of the polyamide nanofiltration membrane are improved.

The invention discloses a passive sampling device and method for specifically enriching quinolones and tetracyclines antibiotics, and relates to water body detection. Firstly, a hydrogel thin film prepared from ZIF-C as an adsorbent is adopted as a binding film, ZIF-C particles are uniformly dispersed on the surface of the binding film, specific adsorption of quinolones and tetracyclines antibiotics can be achieved, then the binding film, a diffusion film and a polyether sulfone filtering film are sequentially stacked to be assembled into an o-DGT device, o-DGT is put into a water body, and through diffusion and adsorption, the specific adsorption of the quinolones and tetracyclines antibiotics can be achieved. The method realizes the extraction and detection of quinolone and tetracycline antibiotics by the DGT technology.

Provided is a coating composition which has excellent coating properties and which forms a coating film that has good water vapor resistance and corrosion resistance. A coating composition comprising an aqueous dispersion containing a water-soluble polyamideimide resin (P), a polyethersulfone resin (Q), and a fluorine-containing polymer (R) containing a non-melt-processable fluorine-containing polymer (S) and a melt-processable perfluoropolymer (T) having a melting point of 200-350 DEG C, the mass ratio of the water-soluble polyamideimide resin (P) to the polyethersulfone resin (Q) is 10 / 90 to 40 / 60.

The application discloses an anticoagulant biomaterial for blood purification and a preparation method and application thereof, and comprises the following steps: providing an amphiphilic copolymer P(AA-MMA); blending polyethersulfone, P(AA-MMA) and a solvent, stirring at a set temperature to obtain a casting solution, and preparing a blending membrane from the casting solution; soaking the blending membrane in a 2-morpholine-4-yl ethanesulfonic acid buffer solution containing argatroban, 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide and hydroxy succinimide, and reacting at room temperature to obtain an argatroban grafted blending membrane, namely the anticoagulant biomaterial. The method improves the hydrophilicity of the membrane, reduces the albumin adsorption of the membrane, reduces the adhesion of platelets on the membrane, prolongs the coagulation time APTT, PT and TT of the membrane, and is better in biocompatibility and enhanced in anticoagulation performance.

The invention relates to a calcium chloride injection and a production method thereof, and relates to the technical field of calcium chloride injection production, a solvent of the calcium chloride is water for injection, and the injection contains the following components: 80-120 g / L of calcium chloride; the concentration of the water for injection is 800-1200 g / L; hydrochloric acid is a proper amount of component for adjusting the pH value to 5.3-5.8; and the sodium hydroxide is a proper amount of component used for adjusting the pH value to 5.3-5.8. According to the calcium chloride injection and the production method thereof, the problems of solution turbidity, calcium ion precipitation, oxidative degradation and the like caused by insufficient dissolution and local supersaturation of calcium chloride in the prior art are effectively solved by accurately controlling the concentration of calcium chloride and adopting a nitrogen protection dissolution process. Meanwhile, a 0.22 mu m polyethersulfone two-stage filter element series connection filtering process, an integrity testing process with the foaming point larger than or equal to 3450 kPa and a sterilization and leak detection integrated process are adopted, the sterility guarantee level and stability of the product are remarkably improved, the endotoxin of the finished product is smaller than 0.5 EU / mL, the number of visible foreign matter larger than or equal to 10 mu m is reduced by larger than or equal to 60%, and the clinical safety and effectiveness of the injection are ensured.

The invention discloses a treatment system for synergistically removing odor substances and a new pollutant PFAS in water and a treatment method thereof. The treatment system comprises a pre-oxidation unit, an algae removal, adsorption and clarification unit, a membrane separation and concentration unit and a destruction unit which are connected in sequence. The pre-oxidation unit is provided with an oxidation pond with a transverse reciprocating dynamic aeration assembly, so that the ozone mass transfer efficiency is improved. The algae removal, adsorption and clarification unit enables a suspended carbon mud bed to periodically expand and contract through a pulse generator so as to strengthen adsorption. The membrane separation and concentration unit adopts a modified polyether sulfone conical-end filtering membrane and is matched with an online cleaning mechanism, so that PFAS is efficiently intercepted, and secondary pollution is avoided. The destroying unit is used for carrying out synergetic high-temperature incineration on the membrane separation concentrated water and the waste carbon mud, and PFAS is thoroughly decomposed at the temperature higher than or equal to 900 DEG C; by optimizing ozone aeration, pulse adsorption, fluorine-free membrane separation and collaborative incineration, efficient collaborative removal of odor substances and new pollutant PFAS and harmless treatment of waste are achieved, the system integration degree is high, the treatment effect is good, and the risk of secondary pollution is avoided.

The present application relates to a kind of water-based paint for leather surface waterproof, belong to coating technical field.The water-based paint is made of the following components: 80 parts polyether sulfone modified polyurethane-acrylate composite resin dispersion, 5 parts crosslinking agent polycarbodiimide, 10 parts anti-adhesive polydimethylsiloxane, 10 parts cosolvent dipropylene glycol methyl ether, 10 parts nano reinforcing material, 1.5 parts amino-terminated hyperbranched polyamide.Core resin dispersion is prepared by grafting onto polyurethane-acrylate skeleton through sulfonated polyether sulfone chemistry.The present application is prepared by unique resin chemical modification and nanocomposite technology, so that the obtained coating has excellent waterproofness, high adhesion, good mechanical strength and anti-aging property, especially suitable for high requirements such as automotive interior, furniture and other leather surface treatment, while meeting environmental protection requirements.

The invention belongs to the technical field of polyethersulfone, and particularly discloses a polyethersulfone microfiltration membrane with an integrally-formed double-layer structure and a preparation method of the polyethersulfone microfiltration membrane. The polyethersulfone microfiltration membrane is prepared from a single solution coating through an upper and lower layer dual induction process, and the cross section of the membrane is in a highly asymmetric form with a double-layer structure on the integrity; the upper layer is of a coarse-branch continuous macroporous structure and can accommodate more intercepted particles, so that the service life of the filter membrane is prolonged; the lower layer is of a fine branched continuous small hole structure, so that interception of particles can be ensured, and the filtering quality is improved; the upper layer and the lower layer are communicated in aperture, the structural cohesion is good, and no fracture phenomenon occurs; the thickness ratio of the upper layer to the lower layer is 2: (2.5-3.5); the preparation technology is simple and controllable in process, easy to implement, low in equipment requirement and suitable for batch production.

The invention discloses a heat dissipation coating suitable for a PTC (Positive Temperature Coefficient) electric heater and a preparation method of the heat dissipation coating. The heat dissipation coating is prepared by adding graphene, carbon nanotubes, boron nitride and other substances with high thermal conductivity into the coating, matching with a polyethersulfone material and a polytetrafluoroethylene material with excellent temperature resistance to prepare film substances and blending. According to the heat dissipation coating prepared by the invention, the heating power of the PTC electric heater and the infrared heat radiation intensity of the surface can be effectively improved, and the temperature rise time of the environment is shortened. And the heat dissipation coating has excellent high temperature resistance, and can be used at 260 DEG C for a long time without peculiar smell. In addition, the heat dissipation coating is environment-friendly in preparation process and excellent in corrosion resistance.

This invention relates to a special engineering plastic polyethersulfone microporous foam material and its preparation method, belonging to the field of polymer foaming technology. It solves the problem in existing technologies where high foaming ratio, microporous structure, and excellent mechanical properties cannot be simultaneously achieved when using injection molding technology for macromolecular polyethersulfone materials. The method of this invention includes the following steps: Step 1: Raw material pretreatment; Step 2: Melt blending: Mixing PES substrate, second component, functional filler, crosslinking agent, and cell stabilizer, followed by melt blending, granulation, and drying to obtain granules; Step 3: Injection molding: Injecting the granules into an injection molding machine, adding a composite foaming agent to the injection molding machine, mixing, and injection molding to obtain an injection-molded foam material; Step 4: Curing: Irradiating the injection-molded foam material with X-rays to obtain the special engineering plastic PES microporous foam material.

The present application relates to the field of water treatment membrane separation technology, in particular to a corrosion-resistant and anti-blocking nanofiltration membrane for coal mine wastewater reverse osmosis treatment and a preparation method thereof, which is used to solve the problem that the existing nanofiltration membrane is prone to chemical corrosion and physical blockage, affecting the service life and treatment efficiency of the membrane; polyether sulfone is used as the base material, which has excellent film-forming property, anti-pollution property, chemical stability and corrosion resistance; amino-MXene, manganese-nickel nanowire and ZIF-8 nanoparticles are added, the amino-MXene enhances the Donnan exclusion effect on heavy metal ions, the manganese-nickel nanowire provides a catalytic site for potassium persulfate, the ZIF-8 nanoparticles provide an additional fast transport channel for water molecules, and the permeability and heavy metal removal rate are improved; polyvinyl alcohol and piperazine form hydrogen bonds to form Turing structures, increase the effective membrane area, and improve the water permeability; the zwitterionic polymer is grafted on the surface of the membrane to form a hydration layer with water molecules, prevent the adsorption of pollutants and prevent blockage.

This invention relates to the field of polyaryletherketone (PAEK) material modification technology, specifically to an ultra-low temperature resistant PAEK composite material and its preparation method, comprising the following materials: PAEK resin, polyethersulfone resin, aramid fibers with surface carboxylation pretreatment, sheet-like thermally conductive filler with a thermal conductivity of at least 400 W / m·K, and a coupling agent; this invention, through the synergistic blending modification of sheet-like thermally conductive filler with polyethersulfone (PES) microspheres and aramid fibers, achieves the advantages of high strength, high toughness, and low thermal stress in the composite material under extreme low temperature environments.

The application provides a high-temperature-resistant geotextile and a preparation method thereof, and belongs to the field of building materials. By grafting maleic anhydride on benzene diamine aminated polyether ether ketone, a gradient polar group distribution is formed, the interface bonding force and the compatibility are improved; meanwhile, the polyether sulfone is modified by introducing carboxyl and epoxy groups, a complementary network is formed, the matrix toughness and the interface bonding force are enhanced; the phosphate provides a polar bonding site on the surface of aluminum nitride, the ionic liquid forms a heat conduction network, and the heat conduction efficiency is improved; the silane group provides a chemical bonding site on the surface of silicon carbide, and the dopamine forms a secondary structure thereon, and the interface bonding force is enhanced; the polyether ether ketone with the amino-maleic anhydride structure is interwoven with the carboxyl-epoxy group of the polyether sulfone, a interpenetrating network is formed, and the matrix toughness and the thermal stability are improved; the multi-level interface structure of aluminum nitride and silicon carbide is helpful to uniform stress transmission and interface firmness.

This invention discloses an antifouling membrane made of lanthanum-loaded carbon nanomaterials suitable for phosphorus recovery in wastewater, its preparation method, and its applications. The invention involves loading lanthanum carbonate octahydrate onto the surface of multi-walled carbon nanotubes (MWCNTs) to form lanthanum-loaded carbon nanomaterials (La@MWCNTs), which are then deposited onto the surface of a polyethersulfone-based membrane using vacuum filtration to form a self-supporting membrane. The prepared lanthanum-loaded carbon nanomaterial antifouling membrane possesses both phosphorus removal and recovery capabilities, exhibiting high efficiency in phosphorus removal from water. This facilitates phosphorus elution and recovery, effectively solving the problems of lanthanum-loaded carbon nanomaterial aggregation and recovery, and effectively avoiding the risk of lanthanum-based adsorbent leakage during phosphorus removal. Furthermore, the lanthanum-loaded carbon nanomaterial antifouling membrane operates within a low-pressure range, exhibiting low energy consumption and effectively mitigating membrane fouling caused by humic acid. It shows promising application prospects in wastewater phosphorus recovery and eutrophication control.

The invention discloses a double intelligent response and closed-loop control polyethersulfone hollow fiber membrane module and a preparation method thereof.The module comprises a membrane filament bundle, an intelligent control system, a transparent shell, an end cover and an inlet and outlet interface, the membrane filament bundle is composed of a plurality of polyethersulfone hollow fiber membrane filaments, and the inner surfaces of the membrane filaments are grafted with temperature response polymers; an inner surface temperature response layer is formed, a pH response polymer is grafted on the outer surface, an outer surface pH response layer is formed, a dual intelligent response layer with inner and outer partition and function synergy is formed, an independently anchored gradient transition layer is arranged between the response layer and the membrane substrate, and the polymer density of the gradient transition layer is gradually reduced from the membrane surface to the interior of the membrane substrate. The intelligent control system is used for anchoring the response layer on the surface of a base body to enhance the binding force and prevent falling off, integrates a temperature sensor, a pH sensor, a microprocessor and an electric heating element to form a closed-loop control loop, and can adjust the performance of the film in a real-time and self-adaptive mode according to feeding conditions.

A process for producing a phenolic monomer product comprising depolymerizing a recycled polymeric material to obtain a depolymerized mixture comprising phenolic monomers and purifying the depolymerized mixture. The polymeric material comprises at least one PAES polymer and at least one additive, and the PAES polymer preferably comprises a backbone comprising at least one sulfone recurring unit, a first end group being a halide, and a second end-capped group, preferably selected from alkoxy groups and / or phenoxy groups. The additive comprises a polyalkylene oxide and / or a polyvinylpyrrolidone (PVP). A purity of at least 95 wt% of phenolic monomers can be achieved in the product. In particular embodiments in which a recycled hemodialysis membrane comprises a polyethersulfone and PVP, a purity of at least 98 wt% based on the total weight of the phenolic monomer product of 4,4'-sulfonyl phenolic monomers can be achieved after depolymerisation and phenolic monomer purification.

This invention discloses a stable nalmefene hydrochloride injection and its preparation method, relating to the field of biomedical technology. The injection consists of nalmefene hydrochloride, sodium chloride, hydrochloric acid, and water for injection, and contains no metal ion chelating agents, with a pH value controlled between 3.5 and 3.6. The method includes: preparing the solution and adjusting the pH under high-purity nitrogen protection in a solution preparation system with low metal ion introduction risk; filtering the solution through a polyethersulfone membrane with low metal leaching, and then filling it into ampoules with a vulcanized inner surface. This invention, through the systematic integration of multiple measures such as source control of the solution preparation system, inert atmosphere protection, precise pH control, surface passivation of packaging materials, and the use of high-purity materials, synergistically inhibits the metal ion catalytic oxidation of the active ingredient, ensuring that the content of the key degradation impurity II (2,2'-bisnalmefene) remains stably below the quality standard during long-term storage, solving the problem of chemical stability control of products in chelator-free formulations, and combining safety and process robustness.

The invention discloses a symmetric polyether sulfone flat sheet membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The preparation method of the flat sheet membrane comprises the following steps: mixing 15-30 parts of polyethersulfone, 2-10 parts of polyvinylpyrrolidone and 60-80 parts of a cyclic lactam solvent in proportion, melting at 130-160 DEG C, casting to form a membrane, cooling and curing, extracting with hot water, and drying to obtain the symmetric polyethersulfone flat sheet membrane. According to the invention, the dissolution and separation film formation of the polyether sulfone material are realized through the melting and solidification process of the cyclic amide. An organic-solvent-free system containing a cyclic lactam solvent is adopted, no organic solvent exists in the whole process, zero VOC emission is achieved, and environment friendliness is achieved. The prepared separation membrane is of a complete spongy homogeneous structure, is uniform in pore diameter and free of finger-shaped pores, and has good pressure resistance, backwashing resistance and high flux performance. Compared with a traditional thermally induced phase separation method, the operation temperature is lower, and the energy consumption in the preparation process is remarkably reduced.

The invention relates to an intrinsic flame-retardant low-dielectric epoxy resin. The molecular structure of the epoxy resin comprises a) a biphenyl group, and at least one of b) a polyphenylene oxide (PPO) group, c) a polyether sulfone (PES) group or d) a polyamide imide (PAI) group. The preparation method comprises the following steps: dissolving biphenyl epoxy resin in a solvent, adding a polymer with an active group, adding independently or in a certain proportion in a combined manner, fully dissolving, adding a catalyst, heating, and carrying out solution polymerization; and after the reaction is finished, supplementing the solvent to prepare the solvent type modified epoxy resin. The obtained product can improve the limit oxygen index of the epoxy resin, reduce the dielectric constant Dk and the dielectric loss factor Df, realize a greener and more environment-friendly flame-retardant target, and better adapt to the performance requirements of high-end electronic products on high-speed transmission and low loss of electric signals.

The application relates to a high-flux high-rejection asymmetric polyether sulfone ultrafiltration membrane preparation method, which comprises the following steps: S1, mixing polyether sulfone, a conventional good solvent, a volatile poor solvent and a hydrophilic additive, and then uniformly placing and defoaming at a constant temperature to obtain a casting solution; S2, pouring the casting solution on a glass carrier, uniformly coating the casting solution on the glass carrier through a stainless steel scraper to form a primary film, and then performing air evaporation induction pre-phase to obtain a membrane solution; S3, immersing the membrane solution in a coagulation bath, so that the coagulation solution invades the inside of the membrane solution and gradually diffuses inward to be solidified into a film; S4, washing the solidified film formed by using pure water, and storing the film in glycerol, and the preparation of the high-flux high-rejection asymmetric polyether sulfone ultrafiltration membrane is completed. The application is simple, convenient, efficient, economical, environment-friendly and practical, and is very beneficial to product industrialization.

The invention belongs to the technical field of membrane materials, and particularly relates to a preparation method of a dumbbell-shaped polyethersulfone virus-removing membrane, which comprises the following steps: S1, mixing a membrane-forming polymer, an amphiphilic polymer, a non-solvent pore-foaming agent and an organic solvent, stirring, dissolving and defoaming to obtain a uniform and stable membrane casting solution; s2, blade-coating the membrane casting liquid on a support body to form a liquid membrane; s3, exposing the liquid film in humidity-controllable air for a period of time, and carrying out a steam-induced phase separation process; s4, immersing the cast film obtained in the step S3 into a coagulating bath to complete phase inversion so as to form a solid-state film; s5, the formed solid membrane is sequentially subjected to water washing, hole preserving treatment and drying, and the dumbbell-shaped polyethersulfone virus-removing membrane is obtained. The compact layer in the dumbbell-shaped structure ensures the high virus rejection rate, and the porous structure with the open interior reduces the transmission resistance of water to the minimum, so that the unification of the high virus rejection rate and the high water flux is realized, and the protein transmittance is ensured to be more than 98%.