48 results about "Polyethersulfone membrane" patented technology

The invention provides a preparation method of a hydrophobic modified polyethersulfone porous membrane, which comprises the following steps: firstly, preparing a hydrophobic modified solution, then carrying out crosslinking pretreatment to form a hydrophobic crosslinking coating on a polyethersulfone base membrane, then carrying out crosslinking under ultraviolet irradiation, and finally preparing the hydrophobic polyethersulfone porous membrane. The pre-crosslinked membrane formed by crosslinking pretreatment is formed by forming a hydrophobic crosslinked coating on a polyethersulfone base membrane, and a hydrophobic monomer is grafted on the hydrophobic crosslinked coating under the irradiation of ultraviolet light; the hydrophobic cross-linked coating not only coats the outer surface of the polyethersulfone base membrane, but also can be impregnated on a porous structure in the polyethersulfone membrane, and finally the hydrophobic modified polyethersulfone porous membrane is prepared. Wherein the cross-linking agent is a monomer containing a plurality of unsaturated bonds, an addition polymerization reaction can occur among the unsaturated bonds to form a spatial net-shaped structure, the hydrophobic cross-linking coating can be firmly covered on the porous structure of the polyether sulfone and cannot fall off, and the hydrophobic monomer is also provided with unsaturated bonds, so that the addition polymerization reaction occurs between the hydrophobic monomer and the cross-linking agent, and a certain number of hydrophobic groups are grafted.

The invention discloses an interface in-situ assembled gel and nanoparticle composite polyether sulfone membrane as well as preparation and application thereof, and belongs to the technical field of nano material and membrane separation. According to the invention, a gel and nanoparticle composite structure is constructed in situ on the surface of the membrane and in pores through a phase separation strategy for the first time, a gel layer of a main body is formed by crosslinking polyphenol and zirconium oxychloride, and nanoparticles are formed by complexing unoccupied sites of polyethyleneimine and polyphenol; a nucleation site is provided for in-situ construction of the gel layer on the surface. Compared with a surface modification post-treatment method, the method disclosed by the invention has the advantages of process integration, coating stability and the like; compared with a mixed matrix membrane constructed by zeolite and carbon nanotubes, agglomeration and polymer embedding are avoided, and a coating constructed by mixing hydrophilic gel and nanospheres can be formed on the surface of the polymer.

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.

This invention discloses a multi-stage treatment method for photovoltaic fluoride-containing wastewater based on semi-permeable membrane separation and the semi-permeable membrane thereof. The multi-stage treatment method includes the following steps: S1, primary treatment; S2, secondary treatment; S3, tertiary treatment. This method first performs primary treatment on the initially high-impurity fluoride-containing wastewater, which can rapidly degrade organic matter and heavy metals in the wastewater. Then, secondary treatment removes most of the heavy metal ions from the wastewater. Crystallization can effectively remove dissolved salts from the wastewater, while electrodialysis can concentrate and recover metal ions from low-concentration wastewater and desalinate the wastewater. Finally, tertiary treatment efficiently separates fluoride ions from the wastewater, and reverse osmosis filtration further removes the remaining fluoride ions and other dissolved salts, ensuring effluent quality. The semi-permeable membrane is a modified polyethersulfone membrane, and water quality is further purified by adding microorganisms.

The invention discloses a purification method of cord blood mesenchymal stem cell source exosome, and relates to the technical field of bioengineering. The method comprises the following steps: firstly, carrying out pH regulation pretreatment on cell culture supernate through a technical path of combining gradient centrifugation and membrane filtration, and sequentially removing cell debris and large-particle impurities by adopting multi-stage differential centrifugation; then carrying out selective protein precipitation by utilizing polyethylene glycol with specific molecular weight, and realizing fine separation of the exosome by combining sucrose-meglumine diatrizoate density gradient centrifugation; and finally, terminal purification is completed under low-temperature and low-pressure conditions through a polyethersulfone membrane filtration system with an optimized pore size. According to the method, centrifugal parameters, reagent concentration and filtering conditions are precisely regulated and controlled, so that the particle size of the obtained exosome is intensively distributed in the range of 30-150nm, the protein purity reaches 95% or above, the recovery rate exceeds 85%, and the separation efficiency and quality of the exosome are remarkably improved.

The invention discloses application of acid polysaccharide from tribonema to preparation of functional food or feed containing prebiotics, and the acid polysaccharide is prepared by the following method: (1) adding dried tribonema powder into water, stirring and extracting, and collecting supernate; (2) adding the residues into water, stirring and extracting, collecting supernate, merging the supernate, concentrating, deproteinizing, precipitating and collecting precipitate; dissolving the precipitate in water, dialyzing, and freeze-drying; (3) dissolving the tribonema crude polysaccharide in water, and adding absolute ethyl alcohol for first-stage precipitation; adding absolute ethyl alcohol into supernate obtained after the first-stage precipitation to carry out second-stage precipitation; adding absolute ethyl alcohol into supernate obtained after the second-stage precipitation to carry out third-stage precipitation; (4) testing the total sugar content of each stage of precipitate; and (5) dissolving the precipitate with the highest total sugar content in water, and carrying out ultrafiltration treatment by adopting a polyether sulfone membrane to obtain the tribonema-derived acidic polysaccharide. The polysaccharide disclosed by the invention has prebiotic activity.

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 present invention discloses a self-supporting polyethersulfone ultrafiltration membrane that resists biofouling, as well as its preparation method and application. The ultrafiltration membrane is produced by immobilizing cellulose nanocrystals and antibacterial ions on the surface and within the pores of the polyethersulfone membrane using polyphenol monomers. The self-supporting polyethersulfone ultrafiltration membrane can stably support hydrophilic and antibacterial materials, thereby imparting excellent hydrophilic properties and biofouling resistance, and can be efficiently and stably applied in water treatment or biological material processing.

The invention discloses a bionic modification method of a hemodialysis membrane and application of the bionic modification method, and belongs to the technical field of medical materials.The method comprises the steps that vinylbenzylamine and vinyltriethoxysilane are dissolved in triethyl phosphate to be stirred, an initiator azodiisobutyronitrile is added, and heating polymerization is conducted to obtain a polymer [P (EP-VTES)]; carrying out amidation reaction to form a gallic acid functional polymer (Ga-EPTES); ga-EPTES is cross-linked to the surface of a polyethersulfone membrane in a monomolecular layer form, and the hemodialysis membrane with the functions of resisting oxidation and removing free DNA is prepared. According to the bionic modification method of the hemodialysis membrane, the functional limitation and modification defects of a traditional blood purification material are broken through, an efficient, safe and large-scale solution is provided for sepsis treatment, and the bionic modification method has scientific value and clinical transformation potential.

The invention discloses a method for predicting the performance of a GO separation membrane based on molecular simulation and a preparation method of the GO separation membrane. Based on a molecular dynamics simulation technology, revealing a relationship among a GO interlayer water distribution state, an interlayer spacing and a chemical environment, and obtaining an interlayer water distribution state beneficial to ion transmission and corresponding geometric and chemical parameters of the membrane; the GO ion separation membrane is prepared under the guidance, a suspension of single-layer GO is prepared, a polyethersulfone membrane is adopted as a substrate, and thermal reduction treatment is performed after vacuum filtration and membrane formation. By reasonably regulating and controlling the interlayer spacing and the chemical environment of the GO membrane, fine regulation and control are carried out on the distribution state of water molecules containing interface bound water and non-interface free water in a confinement channel, and selective transmission of Li < + > relative to Na < + > and Mg < 2 + > by the GO membrane can be realized.

The application relates to a method for purifying umbilical cord blood mesenchymal stem cell-derived exosomes, and relates to the technical field of bioengineering. The method combines gradient centrifugation and membrane filtration. First, the cell culture supernatant is pretreated by adjusting the pH, and cell debris and large-particle impurities are removed by multi-stage differential centrifugation. Then, selective protein precipitation is carried out by using polyethylene glycol with a specific molecular weight, and the exosomes are finely separated by sucrose-meglumine diatrizoate density gradient centrifugation. Finally, terminal purification is completed under low-temperature and low-pressure conditions by using a polyether sulfone membrane filtration system with optimized pore size. By precisely controlling the centrifugation parameters, reagent concentration and filtration conditions, the exosomes obtained by the method have a particle size concentrated in the range of 30-150 nm, a protein purity of more than 95%, and a recovery rate of more than 85%, and the separation efficiency and quality of the exosomes are significantly improved.

The application provides a composite pervaporation desalination membrane and a preparation method and application thereof. The composite pervaporation desalination membrane comprises a separation layer with a separation function and an organic porous base membrane layer serving as a support; the raw materials of the separation layer comprise a polyvinyl alcohol aqueous solution, a PFSA-g-GO nanocomposite and a crosslinking agent, the addition amount of the PFSA-g-GO nanocomposite is 0.2-4.5 mass%, the addition amount of the crosslinking agent is 1-10 mass%, and the mass% is the percentage of the mass of each component to the mass of the polyvinyl alcohol; and the organic porous base membrane layer is a polyacrylonitrile membrane or a polyethersulfone membrane. The preparation method is simple and easy to implement, and has low cost, and can simultaneously improve the water flux and desalination rate of the composite pervaporation desalination membrane.

The utility model discloses a hemodialysis filter with a blood perfusion adsorption function. The hemodialysis filter comprises a filter, two dialysate connectors, a plurality of hollow fiber filaments, two blood connectors and a plurality of adsorption particles. The two dialysate connectors are fixedly connected with the outer wall of the filter, the inner ends of the two dialysate connectors penetrate through the inner wall of the filter, and the dialysate connectors are used for conveying dialysate; the plurality of hollow fibers are mounted on the inner wall of the filter and are made of polyether sulfone membranes; the two blood interfaces are respectively connected in series with the two ends of the filter; the plurality of adsorption particles are mounted in the hollow fiber filaments which are far away from the blood connector and the dialysate connector and are 1 / 3-1 / 2 of the number of the hollow fiber filaments, and the adsorption particles are resin carbon soaked by heparin. According to the hemodialysis and perfusion combined device, the hemodialysis and perfusion functions can be simultaneously completed by a single device through the combination of the characteristics of the hemodialysis filter and the hemoperfusion device, so that the occurrence of infection of patients is reduced.

The invention discloses acid polysaccharide derived from tribonema and a preparation method and application thereof, the preparation method comprises the following steps: (1) adding dried tribonema powder into water, stirring and extracting, and collecting supernate; (2) adding the residues into water, stirring and extracting, collecting supernate, merging the supernate, concentrating, deproteinizing, precipitating and collecting precipitate; dissolving the precipitate in water, dialyzing, and freeze-drying to obtain tribonema crude polysaccharide; (3) dissolving the tribonema crude polysaccharide in water, and adding absolute ethyl alcohol for first-stage precipitation; adding absolute ethyl alcohol into supernate obtained after the first-stage precipitation to carry out second-stage precipitation; adding absolute ethyl alcohol into supernate obtained after the second-stage precipitation to carry out third-stage precipitation; (4) testing the total sugar content of each stage of precipitate; and (5) dissolving the precipitate with the highest total sugar content in water, and carrying out ultrafiltration treatment by adopting a polyether sulfone membrane to obtain the tribonema-derived acidic polysaccharide. The purification process is simple, convenient and efficient.

The invention provides a method for extracting nervonic acid from xanthoceras sorbifolia bunge. The method comprises the following steps: S1, performing low-temperature squeezing pretreatment on xanthoceras sorbifolia bunge kernels to obtain low-impurity crude oil; s2, performing ultrasonic-assisted PEG-4000 / ammonium sulfate aqueous two-phase extraction to enrich nervonic acid; s3, filtering through a composite polyether sulfone membrane loaded with amino modified montmorillonite-graphene, and intercepting impurities such as erucic acid in a targeted manner; s4, carrying out mild saponification and acidification; and S5, carrying out low-temperature gradient crystallization to obtain high-purity nervonic acid. Compared with the prior art, molecular distillation, a toxic solvent and a composite membrane are not needed, high-targeting interception-high-flux synergy is achieved, an aqueous two-phase system can be recycled, the final nervonic acid purity is larger than or equal to 99.5%, the extraction rate is larger than or equal to 0.8%, the waste liquid amount is reduced by 70%, the total consumed time is shortened to 10-12 h, and the problems that in the prior art, purity is low, pollution is large, and cost is high are solved.

This invention relates to the field of wastewater treatment technology, specifically to a process and system for removing heavy metals from ink wastewater. It includes the following steps: coagulating ink wastewater with a metal composite coagulant, adsorbing and removing sludge wastewater with an ink sludge-based adsorbent, and filtering wastewater using a catechol-modified polyethersulfone membrane, followed by detection. This invention utilizes high-iron copper slag with titanium tetrachloride and acetylacetone to prepare a metal composite coagulant, transforming the copper slag into a high-value-added water treatment agent. This significantly reduces the production cost of the coagulant. Through the synergistic leaching of dilute sulfuric acid and hydrogen peroxide, the iron element in the copper slag is efficiently extracted and oxidized into Fe, which has a strong coagulation effect. 3+ The trace amounts of copper and other metal ions dissolved also provide a basis for subsequent composite reactions, thus improving the overall treatment efficiency and effluent quality of oily sludge wastewater.

This invention provides a high-performance polyethersulfone membrane and its preparation method, comprising the following steps: sulfonated polyethersulfone is blended with polyethersulfone and dissolved in a mixed solvent containing ionic liquid, and aminated nano-SiO2 particles are added, followed by ultrasonic dispersion to achieve covalent grafting, resulting in a premix; aminated Fe3O4 nanoparticles are added to the premix, and after ultrasonic dispersion, a crosslinking agent is added and stirred until homogeneous, resulting in a casting solution; the casting solution is degassed until no bubbles are visible, then cast onto a substrate, and coated using a doctor blade, with a magnetic field applied below the doctor blade during the coating process; the coated membrane is immersed in a coagulation bath, and through the synergistic effect of phase inversion and interfacial crosslinking reaction, a polyethersulfone membrane is obtained; the membrane exhibits high water permeability, antifouling properties, and high mechanical strength.

The present application belongs to the technical field of analytical chemistry, environmental monitoring and water quality online detection, and particularly relates to a hydroxyapatite-chitosan modified polyether sulfone membrane, a preparation method thereof and application of the membrane in detection of heavy metal ions in combination of membrane solid phase extraction and laser-induced breakdown spectroscopy. The present application mixes chitosan, hydroxyapatite and an aqueous glacial acetic acid solution to obtain a functional solution; the functional solution is coated on the surface of a polyether sulfone microporous filter membrane, and then solidified by alkali neutralization to obtain a hydroxyapatite-chitosan modified polyether sulfone membrane. The hydroxyapatite-chitosan modified polyether sulfone membrane provided by the present application can be well adapted to LIBS, can realize effective enrichment of trace heavy metals in a liquid sample to the membrane surface, can construct a high-stability solid target, and can realize rapid, high-sensitivity and high-anti-interference detection of heavy metal ions in the liquid sample.

The invention provides an anticoagulant hollow fiber membrane for blood purification and a preparation method thereof, and relates to the technical field of medical polymer membranes, and the preparation method comprises the following steps: respectively introducing a spinning solution and an internal solidification solution into a coaxial spinning nozzle for hollow fiber spinning, so that the spinning solution is firstly in contact with the internal solidification solution on a lumen side, an initial phase separation interface is formed on the lumen side, and the initial phase separation interface is formed on the lumen side; according to the preparation method, a hydrophilic polymer component and a surface anticoagulation modification component are introduced into a polyether sulfone membrane matrix, and the solvent exchange rate between an internal coagulation liquid and a spinning liquid is controlled in the spinning phase inversion process, so that a sulfobetaine polymer is directionally migrated to a lumen side interface and is enriched on a blood contact inner surface; on the premise of ensuring the structural strength of the membrane body and the stability of the pore structure, a high-density anticoagulation functional layer is constructed on a blood contact interface, so that the separation of structural support and interface functions is realized, the blood compatibility is improved, and the blood coagulation risk is reduced.

The invention provides an MXene-based metal ion cage membrane as well as preparation and application thereof, and belongs to the technical field of nanofiltration membranes. The MXene-based metal ion cage membrane provided by the invention comprises a hydrophilic modified polyethersulfone membrane, a first polyethyleneimine modified layer, a K < + > intercalation MXene membrane and a second polyethyleneimine modified layer which are sequentially laminated, and the K < + > intercalation MXene membrane comprises an MXene membrane formed by self-assembly of MXene nanosheets and K < + > intercalated between the MXene nanosheet layers. The MXene-based metal ion cage membrane provided by the invention has excellent stability in water, the rejection rate of dye molecules and metal cations is relatively high, and the filtering efficiency is relatively high.

The application relates to a modified two-dimensional material film and a preparation method and application, comprising a two-dimensional material film, the two-dimensional material film is subjected to electron beam irradiation; the irradiation dose of the electron beam irradiation is 5 kGy; the preparation steps of the two-dimensional material film are as follows: a solution of two-dimensional material powder is ultrasonically dispersed, the supernatant colloid with single-layer two-dimensional material lamella in the upper layer is taken as experimental material; the colloid solution is added into deionized water to dilute the solution concentration, and a glass rod is used to stir and uniformly mix; a polyether sulfone film with a pore size of 0.2 mu m and a diameter of 50 mm is used as a base film, the base film is placed on a vacuum filtration device, the diluted colloid solution is poured into the vacuum filtration device, water is pumped away through the vacuum filtration device, and the two-dimensional material is deposited on the base film to obtain a two-dimensional material film. The electron beam irradiation technology is a stable and convenient modification method, has good irradiation effect on the two-dimensional material, and according to different irradiation times, the two-dimensional film material with different strong and weak inductive effects is obtained.

The invention belongs to the technical field of biotechnology and cell preparation, and particularly relates to a preparation method of a plant exosome compound based on an ultra-pure technology, which comprises the following steps: S1, treating plant tissues by adopting a low-temperature enzyme-assisted wall breaking technology to prepare plant tissue homogenate; s2, carrying out primary clarification on the homogenate obtained in the step S1, and removing large-particle impurities; s3, carrying out microfiltration pretreatment on the clarified liquid obtained in S2 through a polyether sulfone membrane; s4, carrying out tangential flow ultrafiltration on the filtrate obtained in S3 to remove macromolecular impurities; s5, performing tangential flow nanofiltration on the filtrate obtained in the step S4 to enrich exosomes; s6, performing iodixanol and sucrose mixed density gradient separation on the enrichment liquid obtained in S5, and collecting exosomes in corresponding density intervals; s7, the exosome obtained in the step S6 is subjected to buffer solution replacement, and the density gradient agent is removed; and S8, adding a low-temperature freeze-drying protective agent into the plant exosome obtained in the S7 to prepare the plant exosome compound.

The present application relates to a kind of polypeptide separation and purification antibacterial anti-pollution high-flux polyether sulfone membrane, the present application is by dissolving substrate in solvent, and adding pore-forming agent and the modifier synthesized, heating stirring to form yellow transparent casting membrane liquid.Modifier is mainly prepared by synthesizing amino acid hydrochloride.D-A modifier is blended with substrate, solvent and pore-forming agent, and the effect of blending modification is achieved.The experiment uses phase inversion process to prepare a kind of polypeptide separation and purification antibacterial anti-pollution high-flux polyether sulfone membrane.The present application has the advantages that the synthesis condition of modifier is mild, and the method is simple;The addition of modifier realizes the hydrophilization modification of membrane surface, also significantly improves the antibacterial, anti-pollution performance and flux of membrane, is conducive to the long-term stable operation of membrane, and has good permeation rate to polypeptide, has very good rejection rate to macromolecular impurities, and the prepared polypeptide separation and purification antibacterial anti-pollution high-flux polyether sulfone membrane has wide application.

The invention relates to a nitrogen-doped graphene quantum dot composite nanofiltration membrane as well as a preparation method and application thereof. The preparation method comprises the following specific steps: providing a nitrogen-doped graphene quantum dot solution and marking the nitrogen-doped graphene quantum dot solution as an N-GQDs solution; the preparation method comprises the following steps: pre-treating a polyethersulfone membrane to obtain a PES substrate membrane; preparing a tannic acid / iron intermediate layer on the PES substrate film to obtain a PES-TA / Fe film; mixing an N-GQDs solution and 2-hydroxypropyl-beta-cyclodextrin to obtain a water phase solution, depositing the water phase solution on the surface of a PES-TA / Fe membrane for a certain time, pouring out the water phase solution, and adding a 1, 3, 5-trimesoyl chloride / normal hexane solution to carry out an interfacial polymerization reaction; and transferring the prepared membrane into a drying oven for thermal crosslinking to obtain the required nitrogen-doped graphene quantum dot composite nanofiltration membrane, namely the N-CD membrane. The permeability of the nanofiltration membrane is improved while the interception performance of the nanofiltration membrane is not reduced, and the method has a wide application prospect in antibiotic wastewater treatment.

The invention belongs to the technical field of polyethersulfone, and particularly discloses a highly asymmetric polyethersulfone membrane and a preparation method thereof. The highly asymmetric polyethersulfone membrane is prepared through dual induction based on a specific membrane casting solution system, the microstructure is of a porous structure, the membrane thickness is 100-130 microns, the highly asymmetric polyethersulfone membrane is sequentially divided into a macroporous layer and a microporous layer in the thickness direction, the average aperture ratio of the macroporous layer to the microporous layer is larger than or equal to 50, and the thickness ratio of the macroporous layer to the microporous layer is (1-4): (1-2). On the premise that the macropore depth can be regulated and controlled, the macropore depth of the membrane can be deepened, and a certain compact layer (namely a micropore layer) thickness of the membrane can be kept, so that the separation capacity and the service life of the membrane can be ensured while the filtration capacity of the membrane is improved.

The application discloses an interface in-situ assembled gel and nanoparticle composite polyether sulfone membrane and preparation and application, and belongs to the field of nanometer material and membrane separation technology. The application in-situ constructs a gel and nanoparticle composite structure on the membrane surface and in the pore channel through a phase separation strategy for the first time, a main gel layer is formed by cross-linking of polyphenol and zirconium oxychloride, and nanoparticles are formed by complexing of polyethylene imine and free sites of the polyphenol, which provides nucleation sites for the in-situ construction of the gel layer on the surface. Compared with a post-processing method of surface modification, the method has the advantages of process integration and stable coating; compared with a mixed matrix membrane constructed by zeolite and carbon nanotube, the application avoids agglomeration and polymer embedding, and can form a coating layer on the polymer surface, which is constructed by mixing hydrophilic gel and nanospheres.

This invention belongs to the technical field of covalent organic framework membrane materials, and provides a covalent organic framework / polyethersulfone hybrid matrix membrane, its preparation method, and its application. The method includes the following steps: mixing polyethersulfone, a solvent, and trialdehyde resorcinol to obtain a trialdehyde resorcinol solution; coating the trialdehyde resorcinol solution onto a glass fiber filter membrane to obtain a trialdehyde resorcinol / polyethersulfone membrane; mixing p-phenylenediamine, a catalyst, and water to obtain a p-phenylenediamine solution; and immersing the trialdehyde resorcinol / polyethersulfone membrane in the p-phenylenediamine solution to react, thereby obtaining the covalent organic framework / polyethersulfone hybrid matrix membrane. The preparation method of this invention is mild, and the resulting membrane is uniform and stable, fully combining the advantages of high polymer flux and strong CO2 adsorption and separation by covalent organic frameworks, significantly improving the H2 flux and H2 / CO2 selectivity of the covalent organic framework / polyethersulfone hybrid matrix membrane.

The present disclosure is related to a polymeric membrane, comprising a modified surface obtained from coating with hydrophilic monomers and curing the hydrophilic monomers with actinic irradiation, preferably UV light, wherein the hydrophilic monomers comprise at least one amino moiety; at least one polyoxyalkylene unit; and at least one (meth)acrylate moiety.

The invention relates to the technical field of membrane separation, in particular to a phthalazinone copolyether sulfone membrane which is formed by copolymerization of phthalazinone diphenol, dichlorodiphenyl sulfone and biphenol, the molecular structure of the phthalazinone copolyether sulfone membrane comprises sulfonyl and phthalazinone structural units, and the molar percentage of the phthalazinone diphenol is 20-40%. Along with the increase of the content of the phthalazinone structure in the phthalazinone copolyethersulfone, finger-shaped pores in the hollow fiber membrane disappear and become spongy pores, the membrane structure becomes compact, the surface of the hollow fiber membrane becomes a loose and porous structure, the hydrophilicity of the hollow fiber membrane is improved, the water contact angle of the hollow fiber membrane is reduced from 71.5 degrees to 58.5 degrees, and the water contact angle of the hollow fiber membrane is reduced from 71.5 degrees to 58.5 degrees. The porosity of the hollow fiber membrane is reduced, the water flux is firstly increased and then reduced, and the breaking strength of the membrane is improved.

The invention relates to the technical field of wastewater treatment, in particular to a process and a system for removing heavy metals from printing ink wastewater. Comprising the following steps: coagulating printing ink wastewater by using a metal composite coagulant, adsorbing sludge removal wastewater by using a printing ink sludge-based adsorbent, filtering the wastewater by using a catechol-based modified polyether sulfone membrane, and detecting. According to the method, the high-iron-content copper slag, titanium tetrachloride and acetylacetone are used for preparing the metal composite coagulant, the copper slag is converted into a water treatment agent main body with the high additional value, the production cost of the coagulant is greatly reduced, and through collaborative leaching of dilute sulphuric acid and hydrogen peroxide, the water treatment efficiency is greatly improved; the iron element in the copper slag is efficiently extracted and oxidized into Fe < 3 + > with a strong coagulation effect, and the dissolved trace copper and other metal ions also provide a basis for the subsequent composite reaction, so that the treatment efficiency of the oil sludge sewage and the effluent quality are integrally improved.