428 results about "Polyether sulphone" patented technology

The invention relates to a special engineering plastic polyethersulfone microcellular foam material and a preparation method thereof, belongs to the technical field of high polymer material foaming, and solves the problem that high foaming ratio, a microcellular structure and excellent mechanical properties cannot be simultaneously obtained when a macromolecular polyethersulfone material adopts an injection foaming technology in the prior art. The method comprises the following steps: step 1, pretreating raw materials; 2, melt blending: mixing the PES base material, the second component, the functional filler, the cross-linking agent and the foam stabilizer, carrying out melt blending, granulating, and drying to obtain granules; 3, injection foaming: injecting the granules into an injection machine, adding a composite foaming agent into the injection machine, mixing, and performing injection foaming molding to obtain an injection-molded foaming material; and 4, curing: irradiating the injection-molded foam material with rays to obtain the special engineering plastic PES microcellular foam material.

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 anion exchange membranes, in particular to a dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production and a preparation method of the dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production, and the dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production is prepared by blending and crosslinking quaternized polyether-ether-ketone and carboxylated polyether sulfone, the carboxylated polyethersulfone provides a cation channel to form a double-ion synergistic conduction structure; the preparation process of the anion exchange membrane comprises the steps of quaternized polyether-ether-ketone synthesis, carboxylated polyether sulfone synthesis, membrane casting solution preparation, tape casting drying, crosslinking treatment and alkali liquor ion exchange. By constructing a double-ion channel structure, the synergistic conduction of anions and cations is realized, and the total ion conduction efficiency of the membrane is remarkably improved. The two polymer components form a continuously interlaced channel network, so that the defect that the conduction path of the traditional single ion channel membrane is isolated is avoided.

The invention discloses a hydrophilic polyethersulfone ultrafiltration membrane based on metalloporphyrin coordination modification as well as a preparation method and application of the hydrophilic polyethersulfone ultrafiltration membrane. According to the ultrafiltration membrane, a membrane casting solution is prepared by blending a polyether sulfone base material, an organic solvent, a pore-foaming agent and tetra (4-aminophenyl) porphyrin, and the membrane casting solution is cured and formed in a coagulating bath containing ferric ions through a phase inversion process. The preparation method is characterized in that porphyrin compounds and iron ions are subjected to an in-situ coordination reaction in the phase inversion process to form a stable metalloporphyrin complex network structure, and the prepared ultrafiltration membrane has the following advantages that the hydrophilicity is increased, and the pure water flux is increased; the protein rejection rate is not less than 95%; the antibacterial property and the anti-pollution property are excellent. The process is simple and controllable, and the obtained membrane material has important application value in the field of biological medicine separation.

The invention discloses a modified thermoplastic solid-solution anticorrosive coating, a preparation method thereof and application of the modified thermoplastic solid-solution anticorrosive coating on the surface of a pneumatic actuator, and belongs to the field of industrial equipment surface protection materials. Two novel modifiers are designed to construct a multi-protection system. Wherein the layered double hydroxide-silane covalent grafting modifier takes magnesium-aluminum layered double hydroxide as a matrix, and after covalent modification by a silane coupling agent, the matrix is compounded with a quinoline derivative in an intercalation manner, so that the interface bonding and barrier properties are improved; according to the polyaniline-graphene covalent grafting modifier, few layers of graphene and polyaniline are copolymerized and then grafted with a polyurethane prepolymer, so that the toughness and the conductive corrosion resistance of a coating are enhanced. The coating is prepared by taking polyethersulfone as a matrix, compounding the modifier, nano silicon dioxide and other components, mixing, dissolving, dispersing at a high speed and ultrasonically defoaming. The coating has the advantages of high interface adhesion, strong corrosion resistance, dynamic fatigue resistance, environmental protection, no solvent and the like, and is suitable for surface protection of key components such as a pneumatic actuator shell.

The invention discloses a self-repairing composite floor for a clean room and a preparation method of the self-repairing composite floor, and the preparation method comprises the following steps: carrying out amination treatment on nano silicon dioxide and carbon quantum dots by using a silane coupling agent, and sulfonating polyethersulfone ketone by using concentrated sulfuric acid; the preparation method comprises the following steps: carrying out curing treatment on epoxy resin, an amine curing agent, N-hydroxyethyl maleimide and tetrakis (3-mercaptopropionic acid) pentaerythritol ester to obtain epoxy-mercaptan resin; the preparation method comprises the following steps: carrying out prepolymerization reaction on vacuum dehydrated polyester polyol, tetrahydroxyethyl ethylenediamine, furanpropanol, diisocyanate, a catalyst, 2, 2 '-thiodiethanol and hydroxyl silicone oil to obtain a star-shaped polyurethane prepolymer, adding epoxy-thiol resin, glyceryl borate, sulfonated polyethersulfone ketone, aminated silicon dioxide, aminated carbon quantum dots and an auxiliary agent, carrying out ultrasonic treatment, and carrying out drying to obtain the star-shaped polyurethane resin. The self-repairing coating material is obtained; and coating the self-repairing coating material on the surface of a base plate, and performing hot-pressing curing molding to obtain the self-repairing composite floor for the clean room.

The application belongs to the technical field of membrane preparation, and discloses a heavy metal enrichment block polymer nanofiltration membrane and a preparation method, which comprises the following steps: constructing an ultrafiltration base film: by controlling the proportion of sulfonated polyether sulfone (SPES-F) oligomers and polyether sulfone (PES-OH) oligomers, a block structure polymer with different hydrophilic / hydrophobic segment ratios is synthesized, and finally the block structure polymer is constructed into a base film with uniform pore size, high flux and strong stability; interface polymerization modification: on the surface of the hydrophilic base film, a dense and ordered grid-shaped separation layer is generated by interface polymerization (IP). By adjusting the microstructure of the skin layer, an ultrathin skin layer is constructed, and the structural stability of the base film and the skin layer is cooperatively adjusted, so that the thin skin layer realizes short-range low-resistance and effective screening function.

The invention discloses a preparation method and application of a graphene oxide permeable membrane suitable for a concentrated salt brine system, and relates to the technical field of organic matter removal and desalinization. According to the method, polyether sulfone serves as a basement membrane, carboxylated graphene oxide and sodium alginate are subjected to cross-linking construction, and a graphene oxide / sodium alginate composite membrane is prepared; and then the graphene oxide permeable membrane is immersed in an alkali metal Sr < 2 + > solution and transition metal Fe < 2 + > and Fe < 3 + > solutions in sequence, and the graphene oxide permeable membrane is prepared. The prepared permeable membrane material can realize efficient interception of various soluble organic matters in a salt lake brine system, shows excellent desalting performance, and has a good application prospect in the field of salt lake brine treatment.

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 a preparation method and application of a monovalent cation selective membrane for efficient lithium-magnesium separation, and belongs to the technical field of preparation of cation selective membranes. The monovalent cation selective membrane is composed of a polyamide nanofiltration base membrane and a polyethyleneimine positive electricity layer, and the preparation method comprises the following steps: taking piperazine anhydrous as a water phase concentration and trimesoyl chloride as an oil phase monomer, reacting on a polyethersulfone ultrafiltration base membrane, and preparing the polyamide nanofiltration base membrane by utilizing an interfacial polymerization method; and anchoring on the surface of the polyamide nanofiltration base membrane by utilizing cross-linking of gallic acid and PEI with the molecular weight of about 70000 through a multi-layer deposition method to obtain the Gallic-PEI / polyamide composite membrane with the positively charged surface. The membrane can realize lithium-magnesium separation through pore size screening and electrostatic repulsion effect, and has high lithium-magnesium selectivity while maintaining large lithium ion flux in the application process of an electrodialysis system, so that the lithium-magnesium separation effect of salt lake brine is improved.

The invention discloses an antibacterial nanofiber hemodialysis membrane and a preparation method thereof, and relates to the technical field of dialysis membranes, and the preparation method comprises the following steps: mixing a chitosan derivative, heparin, dopamine, an unsaturated monomer and an initiator in a DMF / phosphate buffer mixed solution to obtain a surface treating agent; taking the polyethersulfone nanofiber membrane as a supporting layer, dipping in a surface treating agent, and performing UV irradiation to form a functional layer, thereby obtaining the dialysis membrane. The preparation method comprises the following steps: compounding phenanthroline cerium triacrylate hybridized CeO2 with N-vinyl pyrrolidone, sodium p-styrenesulfonate and lauryl methacrylate to obtain an unsaturated monomer, compounding the unsaturated monomer with a chitosan derivative, heparin and dopamine to prepare a surface treating agent, impregnating a polyether sulfone nanofiber membrane, and carrying out irradiation curing to form a functional layer. The prepared hemodialysis membrane has efficient anticoagulation and broad-spectrum antibacterial properties, high permeability, low protein adsorbability and long-term stability.

The invention discloses a preparation method of an anti-pollution modified polyethersulfone nanofiltration membrane, which comprises the following steps: step A1, preparation of a membrane casting solution and a coagulating bath: dissolving polyethersulfone, a zwitterionic block copolymer, tetrazine modified graphene quantum dots and tetrabutyl titanate in N-methyl pyrrolidone to obtain the membrane casting solution; the zwitterionic block copolymer forms a dynamic hydration layer through strong hydration to inhibit pollutant adsorption; dissolving calcium chloride and disodium hydrogen phosphate in deionized water, adding triethanolamine to adjust the pH value of the solution to 8.0-9.0, continuously stirring, and adding norbornene modified chitosan in the stirring process to obtain a coagulating bath; the invention relates to the technical field of nanofiltration membranes. According to the preparation method of the anti-pollution modified polyethersulfone nanofiltration membrane, vertical array hydroxyapatite whiskers generated by biomimetic mineralization provide a super-hydrophilic surface to reduce organic matter adhesion; the tetrazine-norbornene light-triggered dynamic cross-linked network endows the film surface with self-repairing capability, and the use damage can be repaired.

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 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 invention provides a hot-melt epoxy resin composition, a prepreg, a fiber reinforced composite material and a preparation method, the hot-melt epoxy resin composition comprises 60-70 parts of liquid epoxy resin, 30-40 parts of solid epoxy resin, 10-20 parts of a flame retardant, 5-15 parts of a flexibilizer, 5-15 parts of a curing agent, and 0.5-1.5 parts of an impregnating compound; the prepreg comprises the following components in parts by weight: 30-45 parts of a hot-melt epoxy resin composition and 55-70 parts of a reinforcing material, the fiber-reinforced composite material is obtained by laminating prepregs in a predetermined form and pressing / heating to cure the resin. The carboxyl-terminated nitrile rubber and the polyethersulfone are mixed for toughening, so that the viscosity of a resin matrix in the curing process is effectively ensured while toughening is performed, serious gummosis of the resin matrix is prevented, and the anti-stripping strength of the composite material is improved; the flame retardant and smoke suppression performance of the composite material can meet the requirements of 60s vertical combustion, 30s 45-degree combustion and smoke density test of an aviation system, so that the system realizes halogen-free flame retardance, and the application range of the material is wider.

The invention provides a polyether sulfone flat sheet membrane with high flux and small molecular weight interception as well as a preparation method and application thereof, and relates to the technical field of membrane materials. The preparation method of the polyethersulfone flat sheet membrane with high flux and small molecular weight interception comprises the following steps: mixing polyethersulfone, a pore-foaming agent, an additive and a good solvent to obtain a homogeneous membrane casting solution; mixing a linear hydrophilic polymer with water to obtain a high-viscosity coagulating bath; wherein the molecular weight of the linear hydrophilic polymer is more than 100kDa; coating a base material plate with the homogeneous casting membrane solution, and placing the base material plate in the high-viscosity coagulating bath to obtain a primary polyether sulfone flat sheet membrane; the primary polyether sulfone flat sheet membrane is rinsed and subjected to pore protection, and the polyether sulfone flat sheet membrane with high flux and small molecular weight interception is obtained. The high-viscosity coagulating bath is adopted, and the membrane casting liquid phase conversion time is delayed, so that a uniform and compact layer is constructed on the surface layer of the membrane casting liquid, the formation of all-medium sponge holes is promoted, and the separation precision of small-molecular-weight substances is improved.

The present invention provides a highly efficient seawater treatment method, belonging to the technical field of seawater treatment. Specifically, an MBR membrane is prepared using polyethersulfone as a main material through a phase conversion method. The obtained MBR membrane has uniform pore size, good surface hydrophilicity, strong pollution resistance, good antibacterial properties, good adhesion between the support layer and the separation layer, and a long service life. The MBR membrane is used for seawater treatment, which can not only effectively remove organic matter such as COD and BOD, ammonia nitrogen, heavy metal ions, etc. in seawater, but also the seawater treatment method is mature, stable, and has good controllability, and is suitable for large-scale industrial applications.

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.

This invention relates to a filter membrane and its preparation method, particularly to a platelet-rich suspension leukocyte-removing filter membrane and its preparation method. The method uses polyethersulfone (PES) material, which has stable mechanical properties, heat resistance, and chemical properties, as the core material, and polylactic acid (PLA) material, which has good biocompatibility and safety, as the outer material. A coaxial electrospinning process is employed to prepare the PES-PLA filter membrane. Furthermore, a vinylpyrrolidone-acrylamide copolymer is grafted onto the surface of the PES-PLA filter membrane. The resulting platelet-rich suspension leukocyte-removing filter membrane has a narrow pore size distribution, high porosity, and good hydrophilicity, biocompatibility, and antibacterial properties. It can effectively filter out leukocytes from platelet suspensions and reduce the risk of bacterial contamination.

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 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.

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 belongs to the technical field of water treatment, and particularly relates to a nanofiltration membrane based on interlayer etching modification and a preparation method of the nanofiltration membrane. The nanofiltration membrane based on interlayer etching modification comprises a polyethersulfone ultrafiltration bottom membrane, a polyester interlayer and a polyamide functional layer, the PG-TMC polyester middle layer is partially etched through the PIP solution, resistance brought by the middle layer is reduced, meanwhile, adsorption and diffusion regulation and control of the PIP solution are achieved, the interfacial polymerization process is optimized, the water flux of the nanofiltration membrane is improved, the interception performance of the nanofiltration membrane is optimized, the hydrophilicity of the nanofiltration membrane is improved, and the pore size distribution of the nanofiltration membrane is improved; the trade-off effect existing in an existing nanofiltration membrane technology is effectively solved, and the comprehensive performance of the nanofiltration membrane is improved.