52results about How to "Improve surface hydrophilicity" patented technology

The invention discloses medical efficient antibacterial silicone rubber and a preparation method thereof, and belongs to the technical field of medical silicone rubber materials.The preparation method comprises the following steps that 1, tannic acid is added into N, N-dimethylformamide and stirred to be uniform, then triethylamine is added, stirring continues to be conducted to be uniform, acryloyl chloride is added under the ice-water bath condition, stirring is conducted for a reaction, and a reaction solution is obtained; performing reduced pressure distillation, centrifugation, washing and vacuum drying to obtain modified tannic acid; step 2, carrying out surface activation treatment on the silicone rubber; step 3, adding the surface-activated silicone rubber and an initiator into acetone, heating and stirring for reaction, filtering and washing, and naturally drying to obtain pretreated silicone rubber; and step 4, mixing the modified tannic acid aqueous solution and the pretreated silicone rubber, and performing ultraviolet light illumination and cleaning to obtain the silicone rubber. The obtained silicone rubber has excellent antibacterial performance, and the preparation method is simple, mild in condition and suitable for large-scale production.

The invention relates to the technical field of titanium alloy material surface treatment processes, and particularly discloses a pickling method for a titanium alloy implant material. The pickling method of the titanium alloy implant material comprises the following steps that a pickling solution is prepared, specifically, HF, HNO3 and water are mixed according to the volume ratio of (3-10): (3-10): 120 and stirred to be uniform, and the pickling solution is obtained; and acid pickling is conducted, specifically, the titanium alloy implant material is soaked in an acid pickling solution, timing is started when the titanium alloy implant material is completely soaked in the acid pickling solution, and the acid pickling time is controlled to be 80-150 s. According to the pickling method for the titanium alloy implant material, a flaky oxide layer on the surface of the titanium alloy implant material can be effectively removed, meanwhile, the surface pitting phenomenon is reduced, and the hydrophilicity and corrosion resistance of the titanium alloy implant material are improved.

The invention discloses self-repairing UHPC (Ultra High Performance Concrete). The self-repairing UHPC comprises a UHPC matrix, magnetic induction microcapsules and a hydrophilic modified heat-shrinkable fiber net, wherein the magnetic induction microcapsules and the hydrophilic modified heat-shrinkable fiber net are distributed in the UHPC matrix; wherein the magnetic induction self-repairing microcapsule comprises a core material and a wall material, the core material adopts isophorone diisocyanate, and the wall material comprises melamine formaldehyde resin and a rubidium magnet; the hydrophilic modified thermal shrinkage fiber net is a woven net formed by hydrophilic modified polypropylene fibers and hydrophilic modified nylon fibers. The hydrophilic modified heat-shrinkable fiber net and the electromagnetic induction self-repairing microcapsule are simultaneously introduced into a UHPC concrete matrix, a synergistic effect is exerted to repair cracks, the overall performance of the concrete can be effectively improved, the toughness, crack resistance, impact resistance and the like of the obtained concrete are remarkably improved, and the service life of the concrete is prolonged. And meanwhile, on-demand release of the repairing material in the self-repairing microcapsule can be realized, the utilization efficiency of the repairing agent is improved, and the applicability is wide.

The invention relates to the technical field of polypropylene, and discloses a preparation process of a master batch for a hydrophilic high-strength polypropylene non-woven fabric, and the master batch for the hydrophilic high-strength polypropylene non-woven fabric is obtained by carrying out melt blending extrusion and granulation on polypropylene resin, a hyperbranched polyurethane elastomer and an antioxidant. According to the invention, polypropylene oxide glycol is used as a polyol monomer, a dicarboxyl sulfobetaine polyol monomer is used as a branched chain extension monomer, and monomers such as isophorone diisocyanate and the like are subjected to a polymerization reaction to obtain the hyperbranched polyurethane elastomer. The polypropylene non-woven fabric has good compatibility with polypropylene resin, can be used as a flexibilizer, and significantly improves the breaking strength and elongation at break of the polypropylene non-woven fabric. The hyperbranched polyurethane elastomer takes a dicarboxyl sulfobetaine polyol monomer as a branched chain extension monomer, so that the hydrophilicity of the elastomer is improved, the water contact angle of the non-woven fabric is reduced, and the surface hydrophilicity is improved.

The chelating type water-soluble fertilizer containing humic acid is prepared from the following raw materials in parts by weight: 35 to 45 parts of urea, 20 to 25 parts of dipotassium phosphate, 20 to 25 parts of calcium ammonium nitrate, 5 to 10 parts of humic acid, 25 to 30 parts of chitosan aqueous solution, 5 to 8 parts of bentonite-doped synergist, 4 to 7 parts of hydroxyapatite regulator, 2 to 4 parts of boric acid, 3 to 5 parts of compound element agent and 2 to 5 parts of vitamin agent. According to the chelating water-soluble fertilizer, the urea, the dipotassium phosphate, the calcium ammonium nitrate and the humic acid are blended, the boric acid, the compound element agent and the vitamin agent are added for mutual blending and regulation, the synergistic agent doped with bentonite and the hydroxyapatite regulator are adopted for regulation and effect regulation, synergistic interaction is achieved jointly, the effect of improving the plant yield and the quality of the product is remarkable, and the yield of the product is increased. Meanwhile, the product acts on the stability of plants under high and cold conditions.

The invention relates to the technical field of coatings, and discloses a preparation method of an environment-friendly wear-resistant water-based coating, which comprises the following steps: adding water-based epoxy resin, modified polyester fiber, a defoaming agent, a thickening agent, a pigment filler and a dispersing agent into water, and shearing and dispersing through a high-speed dispersion machine to obtain the environment-friendly wear-resistant water-based coating. According to the preparation method, the polyester fiber is subjected to ultraviolet radiation grafting modification by using the styryl sulfoacid imine monomer, and a large number of hydrophilic sulfonate groups and active imino groups are introduced to the surface of the fiber, so that the dispersity of the polyester fiber in a water-borne epoxy resin coating is improved, and the wear resistance and the hardness are improved. Active imino groups on the surface of the modified polyester fiber can be subjected to a curing reaction with epoxy resin, so that the interface bonding force between the polyester fiber and the epoxy resin is enhanced, a very good toughening effect is achieved, and the tensile strength, the elongation at break and the impact strength of the epoxy resin are improved.

The invention discloses a preparation method of superfine high-moisture-absorption ES hollow fibers, and relates to the technical field of textiles. According to the invention, polyethylene terephthalate is used as a core layer, steric hindrance of a molecular chain of polyethylene terephthalate is increased through 5-methyl isophthalic acid, diffusion and adsorption of water molecules are facilitated, hygroscopicity is realized, then sulfonated sodium dioctyl succinate is compounded with anionic and cationic surfactants to form a hydrophilic finishing agent, moisture retention of the fiber is realized, and then the fiber is subjected to hydrophilic finishing to form a hydrophilic finishing agent. An inorganic filler is added and is coated through the physical adsorption and chemical reaction effects of stearic acid ester, the number of gaps is increased and channels of water molecules are increased by virtue of the incompatibility of the filler and resin, then during spinning, the hydrophilic finishing agent has an overall anionic property, so that a matrix is assisted to reduce friction, and in a high-speed stretching process, the hydrophilic finishing agent has a hydrophilic property. The chemical fibers are prevented from generating tows which are dispersed and are not easy to wind, and the fibers form a certain physical-mechanical property and a stable structure through secondary stretching.

The present invention provides a flexural and tensile reinforced coarse aggregate ultra-high performance concrete and a preparation method thereof, comprising the following components: 300-800 parts of cement, 100-300 parts of fly ash, 100-300 parts of ceramic powder, 200-300 parts of silica ash, 500-800 parts of sand, 300-600 parts of crushed stone, 10-25 parts of polycarboxylic acid water reducer, and 150-200 parts of water; and also comprising MXene-carbon fiber composite material and steel fiber. The MXene-carbon fiber composite material is 0.2% to 2.0% of the total volume of concrete; and the steel fiber accounts for 0.5% to 2.0% of the total volume of concrete. The loading of MXene makes the carbon fiber more hydrophilic and rough, reduces the attachment of bubbles on the fiber surface and the generation of voids, and improves the compactness of the concrete; at the same time, MXene increases the bonding force, toughness and impact resistance of the carbon fiber / epoxy resin composite material; in addition, the conductive material MXene and the carbon fiber both increase the conductivity of the concrete. The present invention utilizes the mixed doping of carbon fiber composite materials and steel fibers to reduce the overall density of the fiber part and the dead weight of concrete, thereby obtaining a concrete product with enhanced toughening and chemical corrosion resistance.

The present invention relates to a high-entropy hydrotalcite-modified carbon fiber photothermal conversion material and a preparation method thereof. The technical scheme is: in a nitrogen or argon atmosphere, the waste fabric is heat-treated at a temperature of 300 to 700°C for 120 to 300 minutes to obtain a carbon fiber with a porous structure; then the metal salt is mixed in an equimolar ratio and stirred at 100 to 200°C for 10 to 25 minutes to obtain a mixed salt melt; then the carbon fiber with a porous structure is immersed in the mixed salt melt for 10 to 30 minutes, taken out, washed with water, and dried to obtain a high-entropy hydrotalcite-modified carbon fiber photothermal conversion material. The present invention has the characteristics of short production cycle, simple process, low cost, cheap and easy-to-obtain raw materials, and large-scale production. The prepared high-entropy hydrotalcite-modified carbon fiber photothermal conversion material has excellent photothermal conversion efficiency and high water evaporation rate.

The invention relates to the technical field of polysulfone membranes, and discloses a membrane suitable for blood filtration and a preparation method thereof.The preparation method comprises the steps that 4-[(dimethylamino) methyl] phenol and a chloromethyl polysulfone membrane are subjected to quaternization, then quaternary ammonium salt cations and sodium sulfonate groups of sodium sulfonate propyl tea polyphenol are subjected to electrostatic interaction, and the membrane is obtained; meanwhile, the introduced phenolic hydroxyl group and the phenolic hydroxyl group of the sodium sulfonate propyl tea polyphenol can form interaction such as a hydrogen bond, so that the sodium sulfonate propyl tea polyphenol can be firmly modified on the surface of the polysulfone membrane and is not easy to wash and remove. A large number of hydrophilic quaternary ammonium salt cations and sulfonate anions and a tea polyphenol structure are introduced on the surface of polyarylether, so that the water contact angle, the surface hydrophilicity, the DPPH free radical scavenging rate and the oxidation resistance of the polysulfone membrane are remarkably improved. The prepared membrane suitable for blood filtration has wide application prospects in the aspects of blood filtration dialysis membranes and the like.

The present application relates to the technical field of environmental microbial degradation of plastics, and particularly relates to a non-decarboxylation klebsiella SW-03 and application thereof in degrading PLA / PBAT plastics, the non-decarboxylation klebsiella SW-03 strain is preserved in Guangdong Microbial Culture Collection Center on December 5, 2025, the preservation number is GDMCC NO:67412, and the preservation address is the 5th floor of the 59th building of the Institute of Microbiology, Guangdong Academy of Sciences, 100, Middle Martyrs Road, Guangzhou City; the non-decarboxylation klebsiella SW-03 is isolated from eutrophic lake environment, can take PLA / PBAT plastics as the only carbon source, realizes the biodegradation of PLA / PBAT plastic film under normal temperature environment, and solves the problems of the current plastic degradation functional strain resource shortage and limited application scene.

The present invention provides a leaching resin with a surface-bonded polycationic phosphonate, and particularly relates to a polystyrene-based leaching resin with a surface-bonded polyquaternary ammonium cationic phosphonate for high-capacity adsorption and extraction of rare earth ions, which is prepared by copolymerization between a surface-bonded unsaturated cationic phosphonate resin and an unsaturated cationic phosphonate. The leaching resin with the surface-bonded polycationic phosphonate not only has good hydrophilicity and can quickly and highly extract rare earth metal ions in an aqueous solution, but also has an anion exchange function. In particular, the chemical stability of the extraction in the solution is high, and the performance of extracting rare earth metal ions is long-lasting, and it is particularly suitable for recycling in the process of extraction, separation or enrichment and recovery of precious metal ions or rare earth ions, or in the field of uranium extraction from seawater.

The invention discloses a preparation method of a multilayer graphene oxide modified separation membrane. The preparation method comprises the following steps: preparing a dopamine solution by using a tris (hydroxymethyl) aminomethane hydrochloride solution; cutting a polyethersulfone film, putting the cut polyethersulfone film into a dopamine solution, and carrying out co-deposition operation; after codeposition is completed, taking out the polyethersulfone film, performing interfacial polymerization on the polyethersulfone film by using a 1, 3, 5-trimesoyl chloride solution, and preparing a graphene oxide / tannic acid mixed solution and a ferric chloride solution; putting the polyethersulfone membrane subjected to interfacial polymerization into a graphene oxide / tannic acid mixed solution for co-deposition, taking out the polyethersulfone membrane, and putting the polyethersulfone membrane into a ferric chloride solution for cross-linking; the codeposition-crosslinking operation is repeated twice, then the polyether sulfone membrane is taken out and dried, and the multi-layer graphene oxide modified separation membrane is obtained.The multi-layer graphene oxide modified separation membrane is reasonable in structure, the polyamide layer not prone to falling off is prepared through the adhesiveness of dopamine, then graphene oxide is codeposited multiple times, the membrane aperture is further reduced, and the hydrophilicity of the membrane is further improved.

The invention provides an E7 peptide functionalized polyimide fiber scaffold as well as a preparation method and application thereof, and relates to the technical field of medical treatment. The E7 peptide functionalized polyimide fiber scaffold provided by the invention comprises a polyimide fabric, the surface of the polyimide fabric is coated with a polydopamine coating; and the surface of the polydopamine coating is coupled with E7 peptide. According to the E7 peptide functionalized polyimide fiber scaffold provided by the invention, the E7 peptide is combined with the PI fabric, so that the E7 peptide functionalized polyimide fiber scaffold has excellent mechanical properties, thermal stability, surface hydrophilicity and biocompatibility. The BMSCs can be effectively recruited, and the osteogenic differentiation capability of the BMSCs can be enhanced. The scaffold provides a novel material selection with mechanical strength and biological activity for tissue engineering repair of MIRCT, and has clinical potential.

The application discloses a method for modifying a hyaluronic acid grafted polyamide membrane against pollution by a thermal method and application thereof, and relates to a method for modifying a polyamide membrane against pollution and application thereof. In order to solve the problem of poor anti-pollution performance of the existing polyamide membrane, the application uses hyaluronic acid for surface grafting modification of the polyamide membrane. Due to the super-hydrophilic property of the hyaluronic acid, a hydration layer is formed on the surface of the modified polyamide membrane, effectively hinders the adhesion of pollutants, and meanwhile, part of the short chains of the hyaluronic acid can promote the desorption of the membrane surface pollutants while being hydrolyzed, so that the flux recovery rate of the membrane is improved, and the operation cost is reduced. Compared with the traditional polyamide membrane or other modification methods, the anti-pollution performance of the hyaluronic acid modified polyamide membrane is significantly improved, and the anti-pollution efficiency is excellent in the treatment of shale oil fracturing flowback wastewater. The application belongs to the technical field of water treatment membrane preparation.

This application belongs to the field of nanophotocatalytic materials technology, and discloses a mesoporous TiO2 / coumarin-doped graphitic carbon nitride (CM-CN) composite photocatalyst, its preparation method, and its application. The invention first uses a crystallization-driven single-colloidal assembly method to prepare TiO2 particles with a uniform mesoporous structure. Then, dihydroxycoumarin is mixed with urea using a thermal polycondensation method and calcined at high temperature to obtain CM-CN. Next, CM-CN and mesoporous TiO2 are self-assembled in a solvent using a solvent dispersion-promoting technique to obtain the mesoporous TiO2 / CM-CN composite photocatalyst. This mesoporous TiO2 / CM-CN composite photocatalyst possesses a hierarchical pore structure, high specific surface area, excellent hydrophilicity, and strong interfacial bonding, achieving efficient transfer and separation of photogenerated carriers, and enabling the construction of a green, stable, and highly active photocatalytic system. The material preparation process is simple, the raw material cost is controllable, there is no secondary pollution, and the photocatalytic performance is significant, showing good potential for large-scale production and widespread application.

This invention relates to the field of polypropylene film technology and discloses a preparation process for biaxially oriented polypropylene film. The invention involves melting, extruding, and water-cooling polypropylene resin and polymer-loaded silver nanoparticles in an extrusion casting machine, followed by transverse and longitudinal stretching, heat setting, and winding in a biaxial tensile testing machine to obtain a biaxially oriented polypropylene film. The polymer-loaded silver nanoparticles exhibit good compatibility with polypropylene and have minimal impact on the mechanical properties of the polypropylene film. The polymer-loaded silver nanoparticles are uniformly dispersed in the polypropylene film matrix, and the smaller particle size of the silver nanoparticles exposes more antibacterial sites, significantly improving the antibacterial properties of the film. Furthermore, polyitacrylamide contains hydrophilic carboxyl groups, amide bonds, and bisphenol groups; its addition to the polypropylene film helps reduce the water contact angle and improve surface hydrophilicity.

The present invention provides a method for preparing antibacterial and degradable spandex, specifically: polyether polyol and 4,4-diphenylmethane diisocyanate are mixed together in a ratio of 1:1.6 to 1.9 in terms of the amount of substance, and a polymerization reaction is performed to obtain a NCO-terminated prepolymer, and then N,N-dimethylacetamide solvent is added to fully dissolve the prepolymer to obtain a prepolymer solution; a quaternary ammonium salt chain extender, an amine chain extender, and a chain terminator are added to the prepolymer solution obtained in step 1 in order to perform a chain extension reaction and a termination reaction to obtain an antibacterial spandex spinning stock solution, and dry spinning is performed in a high-temperature tunnel after aging to obtain antibacterial spandex, and the temperature of the tunnel is set to 180°C to 270°C. The spandex prepared by the present invention not only has antibacterial properties, but also can be degraded in a humid environment. It is suitable for the fields of disposable diapers, bandages, wet wipes, disposable underwear, masks, etc.

The utility model relates to the technical field of sewage treatment, and discloses a combined biological ball packing device for water treatment, which comprises a main body mechanism and a movement control mechanism, the movement control mechanism is positioned on the outer side of the main body mechanism, and the main body mechanism comprises an equipment main body, a sewage collection tank, a sedimentation tank, a first sliding chute, a biological ball sieve and a second sliding chute, the sewage collection tank is fixedly arranged in the equipment main body, the sedimentation tank is fixedly arranged on the right side of the sewage collection tank, the first sliding chute is fixedly arranged in the middle of the sedimentation tank, the biological ball sieve is movably mounted in the first sliding chute, and the biological ball sieve is a biological ball filler; the second sliding groove is fixedly formed in the front end of the biological ball screen. According to the combined type biological ball packing device for water treatment, when people use the combined type biological ball packing device for water treatment, a cleaning rod connected with an auxiliary sliding block can slide through auxiliary sliding, and a biological ball sieve can be effectively cleaned.

The invention provides a hydrophilic structural adhesive applied to hygienic products. The hydrophilic structural adhesive is prepared from a plasticizer, a polymer thermoplastic elastomer, a surfactant, tackifying resin and an antioxidant. By optimizing the proportion of the components and a specific preparation process, the hydrophilic structural adhesive disclosed by the invention not only improves the hydrophilicity and liquid absorption capacity of a material, but also can keep good bonding strength, stability, softness and air permeability of the material, and is suitable for the fields of infant diapers, female hygienic products and the like.

This invention relates to the field of mineral processing technology, and particularly to a depressant for molybdenum sulfide ore and a flotation separation method and application for copper-molybdenum sulfide minerals. The depressant comprises polyphenols; the polyphenols have the molecular formula C0.05. 32 H 30 O 11 The molecular weight is 590.57 g / mol, and the degree of polymerization is 2-11. The molybdenum sulfide mineral depressant is used for the flotation of copper-molybdenum sulfide minerals. The copper-molybdenum sulfide minerals contain chalcopyrite and molybdenite, with a mass ratio of 1-2:1. This invention provides a molybdenum sulfide mineral depressant and a flotation separation method and application for copper-molybdenum sulfide minerals. The aim is to solve the problems of high toxicity, high loss rate, and high intermingling of existing copper-molybdenum sulfide mineral separation flotation depressants, and to achieve effective separation of chalcopyrite and molybdenite.

The present application relates to a kind of crack-resistant sound-insulating and heat-insulating low-carbon mortar and its preparation method and application, the mortar includes the following raw materials: cement, gypsum, lime, magnesium oxide, modified VAE, modified polystyrene particles, defoamer, water-retaining agent, early strength agent, water-reducing agent and water, wherein the modified VAE is obtained by copolymerization of VAE emulsion with 4-tert-butylbenzoic acid vinyl ester, methyl acrylate and styrene, and the modified polystyrene particles are obtained by initiating graft polymerization reaction of methyl methacrylate, α-methylstyrene and maleic anhydride with polystyrene particles. The crack-resistant sound-insulating and heat-insulating low-carbon mortar of the present application can not only significantly improve the sound insulation and heat preservation performance of the building, but also improve the comprehensive performance of the mortar, and can be widely used in the fields of internal and external wall insulation, sound insulation engineering of the building, etc., which is of great significance for achieving the goal of green building.

A long-lasting antifouling polyamide reverse osmosis membrane, its preparation method, and its applications are disclosed, belonging to the field of membrane separation technology. The membrane comprises a porous support layer and a polyamide selective layer on its surface. The polyamide selective layer is covalently grafted with monoamine-terminated hyperbranched polyglycerol. The monoamine-terminated hyperbranched polyglycerol is grafted into the polyamide network through the reaction of its terminal primary amine groups with acyl chloride monomers during interfacial polymerization. This enriches the multi-hydroxyl branched structure of the hyperbranched polyglycerol on the membrane surface, forming a stable hydrophilic antifouling structure. The aforementioned long-lasting antifouling polyamide reverse osmosis membrane, its preparation method, and its applications result in a membrane with long-lasting and stable antifouling performance, strong hydrophilicity, and a simple preparation process, making it easy to industrialize.

The invention belongs to the technical field of electronic materials and devices, and discloses an all-fiber structure vertical organic electrochemical transistor and a preparation method thereof.The all-fiber structure vertical organic electrochemical transistor is composed of a lower electrode layer, a semiconductor active layer and an upper electrode layer, and the upper electrode layer and the lower electrode layer are ion permeable electrode layers; the porous PAN / PVP nanofiber membrane is composed of a porous PAN / PVP nanofiber substrate and a metal conductive layer, the semiconductor active layer is an electrospun PEDOT: PSS / PAm nanofiber membrane treated by DMSO (dimethylsulfoxide); the preparation method comprises the following steps: firstly, respectively preparing the ion permeable electrode layer and the semiconductor active layer, and then assembling the upper electrode layer, the semiconductor active layer and the lower electrode layer into the all-fiber structure vertical organic electrochemical transistor. The vertical organic electrochemical transistor with the all-fiber structure is more compact in structure, higher in channel utilization rate and shorter in ion transport path, and the signal amplification performance and the time response performance of a device are greatly improved.

This invention provides an electrode material, a working electrode, and an electrochemical nitric oxide sensor for use in an electrochemical nitric oxide sensor, relating to the technical field of detection elements. The electrode material for the electrochemical nitric oxide sensor includes a catalyst applied to an electrode substrate and a first water-retaining agent; wherein the first water-retaining agent includes one or more of SiO2, PVP, CMC, PVA, and PEG. The electrode material for the electrochemical nitric oxide sensor provided by this invention, by adding a first water-retaining agent (SiO2, PVP, CMC, PVA, PEG, etc.) to the electrode material, effectively improves the water retention capacity of the electrode material while improving the surface hydrophilicity of the nitric oxide oxidation catalyst, reducing electrolyte volatilization, thereby maintaining the long-term stability of the sensor in low-humidity environments and improving the sensor's lifespan in low-humidity environments.

This application provides a polymer brush, its preparation method, and its application in fluid drag reduction. The preparation method includes: preparation of an initiator layer; preparation of a PNIPAM brush: under a nitrogen atmosphere, N-isopropylacrylamide, pentamethyldiethylenetriamine, and acrylic acid are added to a mixed solvent of methanol and deionized water, and then cuprous bromide is added to obtain a polymerization reaction solution. A substrate material coated with an initiator layer is immersed in the polymerization reaction solution to perform a SI-ATRP reaction, and a PNIPAM brush is obtained on the surface of the substrate material. Preparation of a DM-PNIPAM brush: 4-dimethylaminobutamine and an activator are dissolved in N,N-dimethylformamide to obtain a modified solvent. The substrate material grafted with the PNIPAM brush is immersed in the modified solvent and reacted to obtain the polymer brush, i.e., the DM-PNIPAM brush. The polymer brush provided by this application improves its stability and durability as a drag-reducing agent in fluid drag reduction.

The application belongs to the field of membrane separation technology, and particularly relates to a novel high desalination rate anti-pollution reverse osmosis membrane material and a preparation method thereof. The preparation method comprises the following steps: contacting a porous support membrane with an aqueous solution containing mixed polyamine monomers and amine-modified nano-silicon dioxide, and then interfacially polymerizing with an oil phase solution containing mixed polyacyl chloride monomers to form a polyamide separation layer; then coating a sulfonated polyether sulfone coating solution to form a first modified layer; and finally coating a reaction solution containing modified polyethyleneimine, carboxylated graphene oxide and a crosslinking agent to form a second modified layer. By compounding aromatic and alicyclic polyamines, and combining amine-modified nano-silicon dioxide anchored in the polyamide network to form a dense separation layer, high desalination rate is ensured; by chemical bonding between the sulfonated polyether sulfone layer and the modified polyethyleneimine / carboxylated graphene oxide / crosslinking agent layer, a stable double-layer modified structure is constructed, and excellent anti-pollution performance is given to the membrane surface. The obtained membrane material has high desalination rate, strong anti-pollution property and stable structure.

The invention belongs to the technical field of PVDF membranes, and particularly discloses a modified PVDF membrane and a preparation method and application thereof.The preparation method comprises the steps that after glucosamine is added into a copper salt aqueous solution, the pH value of mixed liquid is adjusted to be 8-10; then dropwise adding a reducing agent, and carrying out reduction reaction to obtain an NH2 / Cu < + > composite material; uniformly mixing the composite material and CNC to obtain a CNC-NH2 / Cu < + > mixture; adding PVDF particles into a PEG solution, and uniformly stirring to obtain a PVDF membrane solution; adding the mixture into a PVDF membrane solution, carrying out ultrasonic dispersion, and then heating and stirring to obtain a membrane casting solution; and coating the membrane casting solution with a membrane, and carrying out phase inversion in pure water to obtain the modified PVDF membrane. The CNC-NH2 / Cu < + > mixture is added, so that the surface hydrophilicity of the membrane is improved, and the removal efficiency of the membrane on trace pollutants is improved; the adsorption of hydrophobic pollutants is reduced, the membrane pollution is obviously reduced, and the service life of the membrane is prolonged.

The invention relates to the technical field of polypropylene, and discloses a preparation process of a masterbatch for hydrophilic high-strength polypropylene non-woven fabrics. Polypropylene resin, hyperbranched polyurethane elastomer, and antioxidant are melt-blended and extruded, and granulated to obtain a masterbatch for hydrophilic high-strength polypropylene non-woven fabrics. The invention uses polyoxypropylene glycol as a polyol monomer, dicarboxyl sulfonate betaine polyol monomer as a branching chain extension monomer, and isophorone diisocyanate and other monomers for polymerization reaction to obtain a hyperbranched polyurethane elastomer. It has good compatibility with polypropylene resin, and can be used as a toughening agent to significantly improve the breaking strength and elongation at break of polypropylene non-woven fabrics. The hyperbranched polyurethane elastomer uses dicarboxyl sulfonate betaine polyol monomer as a branching chain extension monomer, which improves the hydrophilicity of the elastomer, is conducive to reducing the water contact angle of the non-woven fabric, and improves the surface hydrophilicity.

The invention belongs to the technical field of adsorbents, and particularly relates to a highland barley straw adsorbent and a preparation method and application thereof. The preparation method of the highland barley straw adsorbent comprises the following steps: placing highland barley straws in an ester compound aqueous solution for esterification treatment to remove protein and grease components in the highland barley straws so as to obtain esterified highland barley straws; the esterified highland barley straw is placed in a cellulase solution for enzymolysis treatment, and enzymolysis highland barley straw is obtained; and carrying out enzyme deactivation treatment on the enzymolysis highland barley straws, cleaning to be neutral, drying, and crushing to obtain the highland barley straw adsorbent. According to the highland barley straw adsorbent prepared by the method, the adsorption capacity of PM2.5 in air can be remarkably improved, the defect of the existing adsorbent in the aspect of adsorption capacity is effectively improved, the resource utilization of the agricultural waste highland barley straw is also realized, and the resource waste and the environmental pollution are reduced.