590 results about "Polyether sulphone" patented technology

The invention relates to a synthesis method and application of a poly (ether) sulfuryl block copolymer based on chain exchange reaction, and belongs to the technical field of high polymer materials, the synthesis method comprises the following preparation steps: S1, taking an organic solvent, adding a poly (ether) sulfuryl material into the organic solvent, heating and stirring until the poly (ether) sulfuryl material is completely dissolved to obtain a mixed system; and S2, adding an amino-containing hydrophilic polymer material with reaction activity into the mixed system prepared in the step S1, and removing the solvent after reaction to obtain the poly (ether) sulfuryl block copolymer. The preparation process is easy to operate, the production period is short, the obtained material is stable in performance, and industrial production is easy.

The invention discloses a glue solution for a copper-clad plate and a preparation method of the glue solution, and relates to the technical field of copper-clad plates. According to the prepared glue solution for the copper-clad plate, the composite epoxy resin, the curing agent, the accelerant, the solvent, the flexibilizer and the inorganic filler, the composite epoxy resin comprises bisphenol A epoxy resin, epoxy phenyl polysiloxane, itaconic acid polyaryletherketone and hydroxyl-terminated fluorine-containing vinyl polysiloxane, so that the interface bonding force with the copper plate is enhanced; the dielectric constant and the dielectric loss are effectively reduced, the peel strength and the toughness of the material are also remarkably improved, and the toughening agent is modified polyether sulfone microspheres; the modified polyethersulfone microspheres are prepared by coating polyethersulfone microspheres with hexamethylenediamine tetrapropionamide diamine, the hexamethylenediamine tetrapropionamide diamine is prepared by carrying out acylation condensation reaction on hexamethylenediamine tetramethyl propionate and ethylenediamine, and the polyethersulfone microspheres are prepared by carrying out electrostatic spinning on a spinning solution of polyethersulfone and vinylpyridine, so that the peel strength of the glue solution is remarkably improved.

The invention discloses a high-temperature-resistant metal surface coating and a preparation method thereof, and the high-temperature-resistant metal surface coating comprises the following components in parts by weight: 40-60 parts of ceramic silicon resin, 20-30 parts of polyether sulfone modified organic fluorine resin, 8-10 parts of water-based polyimide resin, 10-15 parts of zinc chrome, 4-6 parts of boron nitride, 3-5 parts of a modified phenolic aldehyde amine curing agent, 8-15 parts of barium sulfate and 8-10 parts of short carbon fiber. The invention relates to the technical field of preparation of metal surface coatings. The metal surface coating is prepared from the following components in parts by weight: 5-8 parts of hollow glass beads, 2-4 parts of a silane coupling agent, 1-3 parts of an organic silicon defoaming agent, 8-12 parts of a dispersing agent, 1-2 parts of a thickening agent and 6-9 parts of a composite coating anti-aging agent. According to the high-temperature-resistant metal surface coating and the preparation method thereof, the ceramic silicon resin, the polyethersulfone modified organic fluororesin and the water-based polyimide resin are adopted as main resin components, a stable structure can be formed at high temperature, and the high-temperature-resistant metal surface coating can bear higher temperature.

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 provides a preparation method of a high-flux stable-selection anti-fouling nanofiltration membrane, which comprises the following steps: carrying out amination modification on a nano material by an activation method to prepare a modified nano material; piperazine, an acid absorbent and the modified nano material are added into deionized water to be mixed, and a water phase solution is prepared; the preparation method comprises the following steps: mixing trimesoyl chloride and normal hexane to prepare an organic phase solution; immersing the polyethersulfone-based membrane into the water phase solution, draining, inversely immersing into the organic phase solution, and carrying out interfacial polymerization reaction to generate a polyamide layer to obtain a composite membrane; and then carrying out post-treatment on the composite membrane to obtain the composite membrane. The membrane has high permeability, high selectivity and strong anti-pollution performance.

The invention belongs to the field of solid-state batteries, and particularly relates to a solid-state battery and a composite electrolyte, preparation and application thereof, and the preparation method of the composite electrolyte comprises the following steps: dissolving a base membrane polymer with a solvent A to obtain a base membrane solution, and forming the base membrane solution into a wet membrane; pre-forming the wet film in an environment with the humidity of 50-80% RH in advance; soaking the wet film in a solvent B, and forming the wet film into a base film; and compounding the base membrane and a precursor solution for forming the electrolyte, and then carrying out in-situ polymerization to prepare the composite electrolyte, wherein the base membrane polymer comprises at least one of polyether sulfone, sulfonated polyether sulfone and polyetherimide; the solvent B is a mixed solvent of water and C1-C4 alcohol, and the volume ratio of the water to the C1-C4 alcohol is 1: (0.1-10); the precursor solution is a solution containing a monomer, a plasticizer and electrolytic salt. The method provided by the invention can be used for preparing the solid electrolyte with a special structure and excellent performance such as fast charge stability.

The invention discloses a preparation method of a nanofiltration membrane with high magnesium and lithium selectivity. The method mainly comprises the following steps: (1) preparing an aqueous phase solution containing macrocyclic amine; (2) soaking a polyether sulfone base membrane into the water-phase solution in the step (1) for a certain time, taking out the base membrane, and removing redundant water drops; (3) preparing a normal hexane solution containing acyl chloride; (4) soaking the base membrane in the step (2) into the n-hexane solution in the step (3), and reacting for a certain time; (5) soaking the membrane in the step (4) into a secondary reaction aqueous solution containing an amine monomer, and reacting for a certain time; and (6) putting the obtained composite membrane into a drying oven, and heating for a period of time to obtain the high-magnesium-lithium selective nanofiltration membrane. The nanofiltration membrane prepared by the method has relatively high magnesium-lithium selectivity.

The invention discloses a dual-modified polyethersulfone membrane and a preparation method thereof, and relates to the technical field of polyethersulfone membranes. According to the technical scheme, the preparation method comprises the following steps: carboxylating polyether sulfone to obtain carboxylated polyether sulfone; the preparation method comprises the following steps: carrying out cationization treatment on chitosan to prepare cationic chitosan; the prepared carboxylated polyether sulfone, cationic chitosan and an additive are prepared into the dual-modified polyether sulfone membrane through a phase inversion method. The problems of general membrane forming property, insufficient infiltration capacity, poor hydrophilicity, membrane body pollution and the like of the polyether sulfone membrane in the actual use process are solved, meanwhile, the biocompatibility of the polyether sulfone membrane is improved, and the service life of the membrane is also greatly prolonged.

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 discloses a preparation method of a high-temperature-resistant benzidine yellow pigment, and belongs to the technical field of pigment synthesis, and the high-temperature-resistant benzidine yellow pigment is prepared by diazotizing 3, 3 '-dichlorobenzidine, coupling the diazotized 3, 3'-dichlorobenzidine with a sulfonimide modified acetoacetanilide derivative to obtain a pigment compound, and finally compounding the obtained pigment compound with sulfanilamide group grafted polyethersulfone. According to the high-temperature-resistant benzidine yellow pigment prepared by the preparation method disclosed by the invention, the high-temperature-resistant performance of the benzidine yellow pigment is remarkably improved and the use performance of the benzidine yellow pigment is improved by introducing the sulfonimide group and the polyethersulfone grafted with the sulfanilamide group for synergistic modification.

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.

A hollow fiber flow field separation system used in the method comprises a hollow fiber flow field separation channel, the hollow fiber flow field separation channel is divided into an inner layer and an outer layer and is provided with a three-way port, the outer layer is a silicon dioxide tube, and the inner layer is a silicon dioxide tube; the inner layer is a hollow fiber membrane made of a polyether sulfone material; the plunger pump is communicated with the hollow fiber flow field separation channel so as to pump the flow carrying liquid to flow in the hollow fiber flow field separation channel; the metering valve is communicated with the hollow fiber flow field separation channel so as to control the flow velocity ratio of the inlet and the outlet of the hollow fiber membrane in the focusing process; the valve is communicated with the hollow fiber flow field separation channel, and the switching of the sampling process, the focusing process and the elution process of the carrier liquid in the hollow fiber flow field separation channel is sequentially controlled by changing the flow direction of the channel. The method has the advantages of high anti-interference capability, high purification speed, high separation accuracy, simplicity in operation and the like, and is expected to be used for separating and quantifying polystyrene nanoparticles in complex matrix samples such as environment or biological tissues.

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 relates to a poly (ether) sulfuryl block copolymer integrated nanofiltration membrane and a preparation method and application thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: adding an additive with reaction active sites into a membrane casting solution, adding another substance capable of carrying out a cross-linking reaction with the additive in the membrane casting solution into a coagulating bath, and carrying out a cross-linking reaction with the additive in the membrane casting solution to obtain the poly (ether) sulfuryl block copolymer integrated nanofiltration membrane. Preparing a flat sheet membrane through a non-solvent induced phase separation technology; the compact hollow fiber nanofiltration membrane is integrally prepared on line by using a double-layer spinning nozzle through dry spraying and wet spinning by taking a membrane casting solution added with a monomer with reaction activity as an inner layer and taking a solution containing another substance capable of being subjected to cross-linking reaction with the monomer with reaction activity in the membrane casting solution as an outer layer. The method disclosed by the invention has the characteristics of simple process, simplicity and convenience in operation, short preparation period and environmental friendliness, and compared with a traditional membrane preparation process, the method is more favorable for preparing the high-flux and high-interception nanofiltration membrane.

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 invention discloses a preparation and application method of a modified ion exchange membrane for electrodialysis, aiming at the problems of poor selectivity, low mechanical strength, high energy consumption and the like of the existing ion exchange membrane, the high-performance modified membrane is prepared by a base membrane pretreatment-functional grafting-gradient curing synergistic process. The preparation method specifically comprises the following steps: performing ultrasonic cleaning and acid-base activation on a polyethersulfone or sulfonated polystyrene-based membrane, soaking the polyethersulfone or sulfonated polystyrene-based membrane in a modification solution containing an amino / carboxyl / sulfo functional monomer, a cross-linking agent and an initiator, and performing gradient heating curing to form a stable cross-linked network; the grafting rate of the modified membrane is 15-35%, the ion exchange capacity is 1.8-2.5 mmol / g, the water content is 25-40%, and the membrane surface resistance is less than 3 omega.cm < 2 >. When the membrane is applied to an electrodialysis device, the membrane runs under the conditions of 10-30V direct-current voltage, 5-15cm / s flow velocity and 25-45 DEG C, the high-salinity wastewater desalination rate is greater than or equal to 95%, and the monovalent ion selectivity coefficient reaches 5.8-7.2; when the catalyst is used for acid-base recovery, the H < + > migration number is 0.92-0.96, and the energy consumption is reduced by 18-25%.

The invention relates to amino-functionalized polyethersulfone as well as an efficient preparation method and application thereof. The invention belongs to the field of preparation of functionalized polyethersulfone. The invention aims to solve the technical problems of high cost, tedious steps and low synthesis efficiency of the existing method for preparing amino-functionalized polyether sulfone. The amino-functionalized polyethersulfone polymer is synthesized and prepared by selecting a specific active monomer, so that the steps of protecting and deprotecting amino groups on the monomer are not needed in the polymerization process, and a conjugated structure in the specific dichloro monomer can stabilize the amino groups and obviously improve the polymerization reaction efficiency. The preparation method has the advantages of simple process, easily available raw materials and low cost. The method is applied to the fields of petrochemical engineering, fine chemical engineering and medical treatment.

The preparation method comprises the following steps: (1) soaking male silkworm moths in white spirit, extracting, and filtering to obtain a male silkworm moth extracting solution; (2) performing percolation extraction on herba epimedii, semen cuscutae, fructus lycii, cordyceps sinensis, herba cistanche, rhodiola rosea, radix astragali, radix rehmanniae praeparata and stigma croci with white spirit to obtain percolate; (3) combining the male silkworm moth extracting solution and the percolating solution to obtain a medicine extracting solution; and (4) filtering the medicine extracting solution by using a 0.22-1 mu m polypropylene filter membrane, standing for 30-60 days, then filtering by using a 0.22-1 mu m polyethersulfone filter membrane, mixing with rock candy liquid, adjusting the alcohol content to (39 + / -2) degrees, and filtering by using a 0.22-1 mu m polyethersulfone filter membrane to obtain the traditional Chinese medicine wine. The medicinal liquor prepared by the preparation method disclosed by the invention is high in stability, and the problem that precipitates are generated by an original production process is effectively solved.

The invention discloses a high-wear-resistance and corrosion-resistance polyether-ether-ketone-based composite material as well as a preparation method and application thereof. According to the material, 60.0-70.0 parts of polyether-ether-ketone is used as a matrix, 18.0-30.0 parts of modified carbon fibers (with 50-200 nm micro-grooves etched in the surface and ZnO nanowires deposited through electrostatic spinning) acidified by nitric acid and coated by polyether sulfone are added, 2.5-12.5 parts of aminated nano zinc oxide / silicon nitride compound particles (with the mass ratio being (0.5-5): (2-7.5) and 2.1-6.0 parts of a graphene / PTFE lubricating system are cooperated, and multi-scale interface enhancement is achieved. A double-screw segmented temperature control (380-420 DEG C) and two-stage injection molding (380 DEG C / 80 MPa to 400 DEG C / 120 MPa) process is adopted, and gradient cooling (20 DEG C / min) is matched to form a Si3N4-rich wear-resistant layer, so that the mass loss rate of the composite material is less than or equal to 0.5% and the volume wear rate is less than or equal to 0.05 mm < 3 > / N.m after the composite material is soaked in an electrolyte with the pH value of 2-12 for 168 hours. The PEEK composite material is especially suitable for new energy automobile lithium battery slurry delivery pump rotors, motor sealing elements and other key parts, and breaks through the technical bottleneck of interface stripping and insufficient corrosion resistance of the traditional PEEK composite material.

The invention discloses a hollow fiber membrane for treating printing and dyeing wastewater and a preparation method thereof, and relates to the technical field of sewage treatment.The hollow fiber membrane for treating printing and dyeing wastewater comprises a polyether sulfone hollow fiber base membrane, and hydrophilic groups and hydrophobic groups are grafted on the surface and the thickness direction of the polyether sulfone hollow fiber base membrane; the number of the hydrophilic groups positioned on the outer surface of the polyether sulfone hollow fiber base membrane is higher than that of the hydrophilic groups positioned on the inner surface of the polyether sulfone hollow fiber base membrane; the number of the hydrophobic groups positioned on the inner surface of the polyether sulfone hollow fiber base membrane is higher than that of the hydrophobic groups positioned on the outer surface of the polyether sulfone hollow fiber base membrane. The hollow fiber membrane has the effects of improving the removal performance of the hollow fiber membrane on water-soluble dyes and grease impurities in printing and dyeing wastewater and having better durability and self-cleaning performance.

The invention discloses a high-performance super-hydrophobic coating, and relates to the technical field of coating preparation. The high-performance super-hydrophobic coating comprises a composite resin matrix composed of polyurethane and polyethersulfone, and zinc selenide nanoparticles and hydrophobic modified inorganic micro-nanoparticles used for constructing a super-hydrophobic surface are dispersed in the composite resin matrix. Polyether sulfone has good tolerance, can significantly improve the thermal stability and structural strength of the coating in a high-temperature environment, and can be blended and crosslinked with a polyurethane network to form a more stable multiphase composite system, enhance the crack resistance and peel strength of the coating, and effectively improve the adhesive force; the zinc selenide nanoparticles can effectively absorb ultraviolet rays and protect the organic resin matrix from being damaged by ultraviolet radiation. The high-performance super-hydrophobic coating provided by the invention is suitable for outdoor severe environments with high temperature, strong ultraviolet radiation and chemical corrosion risk, and long-term stable protection can be provided for outdoor equipment by coating the surface of the outdoor equipment with the high-performance super-hydrophobic coating to form a protective coating.

The invention discloses modified epoxy resin suitable for oven forming and a preparation method and application thereof, and belongs to the technical field of resin-based composite materials. The modified epoxy resin comprises the following raw materials in parts by mass: 45-60 parts of bisphenol A epoxy resin; 10 to 15 parts of glycidyl amine tetrafunctional epoxy resin; 15 to 20 parts of glycidyl ester type trifunctional epoxy resin; 10 to 16 parts of a toughening agent; 40 to 45 parts of 4, 4 '-diaminodiphenyl sulfone; the toughening agent is thermoplastic phenolphthalein polyaryletherketone resin or thermoplastic phenolphthalein polyethersulfone resin, and the obtained modified epoxy resin has similar viscosity-temperature characteristics, highest exothermic temperature and relatively long gelation time as MTM45-1 oven molding resin applied in airbus certification, and is suitable for being used in preparation of oven molding prepregs. And the obtained oven molded prepreg has good stability, and the difference of products in each batch is small.

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 provides a resin glue solution for a copper-clad plate, a high-heat-resistance copper-clad plate and a preparation method, and relates to the technical field of copper-clad plates. According to the resin glue solution for the copper-clad plate, common epoxy resin and isocyanate modified epoxy resin are used as base materials, and organic micro-powder PES powder with good heat resistance is adopted. Compared with inorganic micro-powder, the organic micro-powder PES powder has more excellent dispersing performance. Furthermore, organic micro-powder polyether sulfone PES powder with a relatively high proportion is adopted, and the organic micro-powder polyether sulfone PES powder is compatible with octa-p-aminophenyl-POSS. The compatibility of the 8-p-aminophenyl-POSS not only promotes the dispersion of the organic micro-powder PES powder, but also the amino group in the 8-p-aminophenyl can directly react with the epoxy resin, so that the heat resistance of the epoxy resin is further improved. By adopting the octa-p-aminophenyl-POSS containing silicon element and polyamino, the peel strength, toughness and water resistance of the resin glue solution are better improved, and the comprehensive performance of the obtained copper-clad plate is further improved.

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 provides an anti-sugar and anti-aging cod collagen peptide as well as a preparation method and application thereof, according to the method, the yield and functional characteristics of active peptide are remarkably improved by combining ultrasonic wave with nanometer grinding pretreatment and combining step-by-step directional enzymolysis and a three-stage ultrafiltration membrane precise separation technology. The method specifically comprises the following steps: carrying out ultrasonic pretreatment on dry cod skin, and then soaking and activating in warm water containing natural anti-sugar components; grinding and dissociating collagenous fibers by adopting high-pressure homogenization and nanoscale zirconium oxide beads; the high-purity peptide fragment with the molecular weight of 500-3000Da is obtained through step-by-step enzymolysis of a compound enzyme I and an enzyme II in combination with gradient interception of a three-stage polyethersulfone ultrafiltration membrane. The total nitrogen content of the obtained product is larger than or equal to 14.5%, the proportion of the target peptide fragment is larger than or equal to 96.7%, the yield is larger than or equal to 18.1%, and the product has remarkable anti-saccharification and anti-aging activity and can be applied to skin care products such as essence and masks to achieve collagen repair and skin barrier function improvement.

The invention discloses a preparation method of a layer-by-layer self-assembled enzyme catalysis nanofiltration membrane and application of the layer-by-layer self-assembled enzyme catalysis nanofiltration membrane to removal of organic micropollutants. The preparation method comprises the following steps: manufacturing a hollow fiber ultrafiltration membrane assembly by using a polytetrafluoroethylene hard thick tube and polyether sulfone hollow fiber ultrafiltration membrane filaments; and alternately depositing polyelectrolyte and laccase in the hollow fiber membrane component to obtain the asymmetric polyelectrolyte gradient deposited layer-by-layer self-assembled enzyme catalysis nanofiltration membrane. When the layer-by-layer self-assembled enzyme catalysis nanofiltration membrane is applied to removal of organic micropollutants, due to the fact that the composite membrane has a relatively evacuated pore structure, and when the organic micropollutants are removed through rich hydrophilic functional groups of a modified layer of the membrane and the catalytic oxidation effect of laccase, high flux is achieved, and meanwhile the rejection rate is kept at a high level; the retention rate of organic micropollutant bisphenol A is 90% or above, and the retention rate of atrazine is 99% or above.

The invention provides a brominated flame-retardant polybutylene terephthalate composite material and a preparation method thereof. The brominated flame-retardant polybutylene terephthalate composite material is prepared from the following components in parts by weight: 27 to 58 parts of polybutylene terephthalate resin, 1 to 15 parts of polyether sulfone resin, 13 to 42 parts of a reinforcing agent, 10 to 20 parts of a brominated flame retardant and 2 to 8 parts of a flame-retardant synergist, the polyarylether sulfone resin is selected from polyphenyl sulfone and / or polyethersulfone. According to the brominated flame-retardant polybutylene terephthalate composite material and the preparation method thereof, the specific composition of the brominated flame-retardant polybutylene terephthalate composite material is designed, and the brominated flame-retardant polybutylene terephthalate composite material with excellent comprehensive performance is prepared through the matching effect of the specific polyether sulphone resin and other components; under the conditions of high temperature and high humidity, the mechanical strength retention rate is relatively high, the shrinkage rate is small, and meanwhile, the flame retardance and the tensile property are relatively high.

The invention discloses a preparation method of a BMED anti-pollution ion exchange conducting membrane for treating acid crystal water, and belongs to the field of wastewater treatment. The invention aims to solve the problems of poor anti-pollution performance, poor ion selectivity, low ion transmission efficiency and increased energy consumption of the existing ion exchange membrane caused by membrane pollution of the existing ion exchange membrane. The invention provides an innovative ion exchange membrane surface modification strategy, graphene oxide is doped into sulfonated polyethersulfone, meanwhile, a conductive material polypyrrole is introduced, and specifically, the introduction of GO not only optimizes the hydrophilic-hydrophobic balance of the membrane surface, but also improves the surface roughness and the distribution of fixed charge density. PPy is introduced as a conductive material, the conductivity of the whole membrane is improved, pollutant electrophoresis separation is adopted under the participation of an external electric field, and the scaling phenomenon on the surface of the membrane is effectively relieved through the multi-layer surface modification strategy, so that the anti-pollution performance of the membrane is greatly improved.