147 results about "Porous microspheres" patented technology

The invention discloses a water treatment filtering material and a preparation method thereof, and relates to the technical field of water treatment. When the water treatment filtering material is prepared, alkaline lignin, epichlorohydrin and triethylenetetramine are subjected to a reaction through a reverse suspension cross-linking technology, and lignin porous microspheres are prepared; carrying out reaction on the lignin porous microspheres and picolinamide ligands to obtain modified lignin porous microspheres; 3-mercaptopropyltriethoxysilane and titanium dioxide are subjected to a reaction, and modified titanium dioxide is prepared; the preparation method comprises the following steps: reacting pyromellitic dianhydride, 1, 4-diaminobutylene and 4 ', 4-diaminodiphenyl ether to prepare functionalized polyamide; the functional polyamide, the modified lignin porous microspheres and the modified titanium dioxide are prepared into a spinning solution, and a polyamide membrane is prepared through electrostatic spinning; and carrying out liquid reaction on bromohexane on the polyamide membrane to obtain the water treatment filtering material. The prepared water treatment filtering material has excellent antibacterial property, heavy metal adsorption property, dye removal property and mechanical property.

The application provides a modified hollow porous silica microsphere and a preparation method and application thereof. The preparation method of the modified hollow porous silica microsphere comprises the following steps: S1, mixing a pre-hydrolysis solution of orthosilicate, a pre-hydrolysis solution of alkyl trialkoxysilane, a pre-hydrolysis solution of 1,2-bis(trialkoxysilyl)ethane and a polyol to obtain a mixture, refluxing, removing alcohol and obtaining a prepolymer; S2, mixing the prepolymer obtained in the step S1 with water, emulsifying, adjusting pH to alkaline, aging, filtering and drying, and the modified hollow porous silica microsphere is obtained. The application uses 1,2-bis(trialkoxysilyl)ethane as one of main silicon sources, and uses the mode of pre-hydrolyzing different silanes separately and then mixing and condensing, so that the highly hydrolyzable and polymerizable silane is prevented from being highly hydrolyzed and polymerized and the non-hydrolyzable and polymerizable silane is prevented from being hydrolyzed and polymerized, the preparation process is simple, the raw material cost is low, the porous microspheres obtained have good morphology and high yield, the operation condition is mild, and the application is easy to industrialize.

The invention belongs to the technical field of grinding wheel abrasives, and particularly relates to a diamond porous microsphere, a grinding wheel abrasive and a preparation method and application thereof. The preparation raw materials of the diamond porous microspheres comprise mixed powder, a binder and water, the mixed powder comprises a first ceramic bond, diamond and a pore forming agent. The first ceramic bond, the diamond and the pore forming agent are used as raw materials for preparing the diamond porous microspheres, the diamond porous microspheres have natural pores and prefabricated spherical pores, the porosity is high, and the self-sharpening performance of the grinding wheel grinding material can be improved; the grinding wheel abrasive material is prepared through secondary air degreasing sintering of the diamond porous microspheres, a new three-dimensional pore structure is formed among the naturally stacked diamond porous microspheres, the grinding wheel abrasive material with a'natural pore + prefabricated spherical pore + stacked pore 'multi-stage pore structure is obtained, the cooling, lubricating and chip removal effects of a grinding wheel can be greatly improved, and the service life of the grinding wheel is prolonged. Therefore, the grinding performance and the service life of the grinding wheel are improved.

This invention discloses an iontophoresis gel scleral contact lens and its preparation method, comprising a contact lens frame, a polymer porous microsphere drug-carrying layer loaded with nano-sustained-release drugs, an electrode layer, and a flexible material covering the electrode layer on the contact lens frame, and a gel layer covering the outer side of the contact lens frame. This iontophoresis gel scleral contact lens has a simple structure, facilitates convenient and rapid drug delivery, and provides sustained-release efficacy. It allows patients to self-administer the drug, directly delivering it to the intraocular lesion site, avoiding adverse reactions in other tissues or the whole body, and has a sustained-release function to reduce the frequency of drug administration.

The invention relates to the technical field of polycarboxylate superplasticizer modification, in particular to a method for modifying a polycarboxylate superplasticizer through Ti-SiO2 porous microspheres, the modified polycarboxylate superplasticizer and application. The polycarboxylate superplasticizer is modified by adopting the nano Ti-SiO2 porous microspheres, and the modified polycarboxylate superplasticizer effectively reduces the liquid level tension of slurry, increases the spacing of cement particles and releases more free water, so that the viscosity reduction performance of cement slurry is improved, the mechanical property and durability of a hardened cement material are improved, and the strength of concrete is enhanced. The modified polycarboxylate superplasticizer prepared by adopting the method for modifying the polycarboxylate superplasticizer by adopting the nano Ti-SiO2 porous microspheres, provided by the invention, has relatively high water-reducing rate and relatively good workability and viscosity reduction performance, and the mechanical strength and durability are improved.

The invention discloses a preparation method and application of sand control fluid in an outer annular space of an oil-string casing, and belongs to the technical field of oil-gas field development. The preparation method comprises the steps that S1, the perforation aperture of the oil-string casing and the sand grain size and temperature of a sand production oil layer are obtained; s2, uniformly mixing a non-metallic mineral material, pulverized coal and natural organic compound particles, adding water, and roasting to prepare porous microspheres; s3, paraffin is added, and microspheres wrapping the paraffin are prepared; and S4, adding water and cement to prepare a primary sand control fluid, and adding a retarder or an accelerator to enable the primary sand control fluid to meet the set initial setting time to prepare the sand control fluid. After the prepared sand prevention fluid is solidified, the paraffin can be melted and discharged at the oil layer temperature, so that a sand prevention barrier is formed in an annular space outside an oil-string casing, and due to the fact that the microspheres are porous, a wellbore in the casing is communicated with a sand outlet oil layer, oil gas can enter an oil pipe through pores to be normally exploited and produced, and sand grains are isolated outside. The method is suitable for oil layer sand prevention in oil-gas field exploitation.

The present application provides a kind of porous poly-L-lactic acid microspheres, and its preparation method and injection preparation comprising porous poly-L-lactic acid microspheres, the porous poly-L-lactic acid microspheres are prepared by emulsification-solvent evaporation method from first component, second component and optional auxiliary component, wherein the first component is poly-L-lactic acid, the second component is sodium carboxymethyl cellulose, the content of the first component is 98%-99.9% of the total mass of the first component and the second component, the content of the second component is 0.1%-2% of the total mass of the first component and the second component, and the porous poly-L-lactic acid microspheres have topological morphology.

This invention provides a biodegradable microsphere, its preparation method, and its application. The biodegradable microsphere comprises a porous microsphere with a continuous internal pore structure and a gelatin component loaded on the porous microsphere. The biodegradable polyester microspheres prepared by this invention using a thermally induced phase separation-crystallization method have an excellent interconnected porous structure. The microspheres formed by combining with gelatin biomacromolecules can provide an excellent adhesion and survival environment for cells.

The invention relates to the technical field of drugs for neutron capture therapy and medical contrast agents, in particular to 157Gd neutron embolism microspheres as well as a preparation method and application thereof. According to the technical scheme, the 157Gd neutron embolization microsphere comprises an amidoxime-based porous microsphere and 157Gd loaded on the amidoxime-based porous microsphere. The preparation method comprises the following steps: grafting and polymerizing a functional monomer containing a nitrile group onto a porous substrate microsphere to obtain a porous microsphere containing a polyacrylonitrile group; carrying out ammoximation reaction on the porous microspheres containing the polyacrylonitrile groups, and converting nitrile groups into amidoxime groups to obtain amidoxime-based porous microspheres; and carrying out coordination chelation on the amidoxime-based porous microspheres and 157Gd, so as to obtain the 157Gd neutron embolization microspheres. The medicine is mainly used for neutron capture therapy of tumor local embolism.

The invention discloses a composition with an anti-oxidation function as well as a preparation method and application thereof, and belongs to the technical field of functional foods. The preparation method of the composition comprises the following steps: preparing a gamma-aminobutyric acid-citric acid eutectic mixture; constructing a corn oligopeptide-plant polyphenol oligosaccharide composite micelle; preparing corn germ concentrated powder-lactitol porous microspheres; and synergistically blending. Aiming at the problems of lack of synergistic effect, release mismatching and the like in the prior art, a three-stage physical structure design is adopted, a quick release-medium release-slow release cascade system is constructed, and component time sequence release and function collaboration are realized; plant polyphenol oligosaccharide is introduced to construct natural micelles, and the stability is improved through porous starch coating. The problems of poor component synergism, easy inactivation and the like are solved, endogenous and exogenous anti-oxidation linkage is realized, the action time is prolonged, and the bioavailability is improved.

The present application provides a kind of polyurethane foam of wide frequency range sound absorption.The polyurethane foam of wide frequency range sound absorption includes polyurethane matrix and the porous polyurethane microsphere of bimodal distribution of particle size dispersed therein, the porous polyurethane microsphere is prepared by incomplete reverse emulsification method, its particle size presents bimodal distribution, the particle size ratio of large particle size porous microsphere and small particle size porous microsphere is 2:1~10:1, and the total mass ratio of large particle size porous microsphere and small particle size porous microsphere is 0.5:1~4:1.The present application is dispersed by bimodal distribution of porous polyurethane microsphere in polyurethane foam material, so as to obtain the polyurethane foam sound absorption material of wide frequency range, and the method process is simple.

The invention discloses a seamless constant-temperature moisture-absorbing and heating fabric containing phase-change microcapsules and a preparation method, and relates to the technical field of functional textile materials. The fabric comprises a three-layer seamless structure formed by integrally weaving regenerated cellulose-based yarns, wherein an outer layer contains 10%-20% of ternary composite microcapsules and 20%-40% of far infrared polyester fibers, so that moisture absorption and heating (the heating rate is 1.6-2.0 DEG C / min) and infrared radiation are realized; the middle layer contains 15%-25% of phase change microcapsules and 5%-10% of heat conduction filler, a heat buffer channel is constructed, and the constant temperature duration is 4.5-5.2 hours; the inner layer contains 10%-18% of double-response microcapsules and 5%-10% of porous microspheres, and the skin microenvironment is adjusted. According to the invention, the synergy of instantaneous temperature rise, long-acting constant temperature and comfortable humidity regulation is realized, the retention rate of temperature rise amplitude after 50 times of washing reaches 93.5-94.8%, the interlayer peel strength is maintained at 11.6-12.0 N / cm, and the fabric has high washability and structural integrity.

The invention discloses a preparation method of a monodisperse high-molecular polymer filler, which comprises the following steps: synthesizing seed microspheres with uniform particle size by a dispersion polymerization method, and preparing porous microspheres with required size and aperture by a two-step seed swelling method. In the preparation process, the selection, the mixing mode, the reaction temperature, the reaction time, the material proportion and the like of all the raw materials are accurately controlled, for example, the mass ratio of the dispersing agent to the vinyl monomer is (5-20)%: 1, and the like. A particle size control and pore size distribution model is also introduced to assist in controlling the product performance. The preparation method is simple in process, controllable in process and easy for industrial large-scale production. The obtained monodisperse polymer chromatographic filler has the advantages of accurately adjustable particle size and pore size, good monodispersity, good sphericity and narrow pore size distribution, can be widely applied to the fields of biochemistry, catalytic carriers, drug carriers and the like, effectively overcomes the defects of the traditional chromatographic filler, and meets the requirements of the market on high-performance chromatographic filler.

The invention provides porous silica gel microspheres and a preparation method thereof, and the preparation method comprises the following steps: mixing porous polymer microspheres, a solvent and an organic silicon source, depositing the organic silicon source in pores of the porous polymer microspheres, and carrying out solid-liquid separation to obtain polymer / silica gel composite microspheres; and calcining the obtained polymer / silica gel composite microspheres to obtain the porous silica gel microspheres. According to the preparation method, the porous polymer microspheres are used as a template, surface functionalization treatment does not need to be carried out on the porous polymer microspheres, a surfactant does not need to be used for dispersing the porous microspheres, and an organic silicon source is directly deposited into pores of the porous polymer microspheres; the porous silica gel microspheres can be prepared after the obtained polymer / silica gel composite microspheres are calcined, the use of compounds with extremely high dangerousness and high toxicity is avoided, the raw material cost is saved, the operation process is simplified, the preparation process is safe and environment-friendly, and the porous silica gel microspheres can be applied to the fields of chromatographic packing and the like.

The invention discloses a low-emission scratch-resistant polypropylene composite material and a preparation method thereof, and relates to the technical field of high polymer materials. The low-emission scratch-resistant polypropylene composite material is prepared from the following raw materials: polypropylene resin, functionalized molybdenum trioxide porous microspheres, mineral powder, a flexibilizer, an antioxidant and a light stabilizer. The organic siloxane is grafted to the functionalized molybdenum trioxide porous microspheres, and low-molecular substances such as formaldehyde, acetaldehyde and the like generated in the production process are adsorbed by utilizing the porous structures of the functionalized molybdenum trioxide porous microspheres, so that the odor of the material is reduced; and meanwhile, the grafted organosiloxane reduces the surface friction coefficient and provides lasting scratch resistance. The synthesis raw materials of the functionalized molybdenum trioxide porous microspheres are easy to purchase, economical, environment-friendly and efficient, and the production cost is reduced.

The invention relates to the technical field of preparation of micro-nano adsorption materials, in particular to a magnetic porous microsphere for in-vitro diagnosis and a preparation method of the magnetic porous microsphere. The invention discloses a preparation method of magnetic porous microspheres for in-vitro diagnosis. The preparation method comprises the following steps: S1, preparing polystyrene-based spheres; s2, preparing porous polystyrene microspheres; s3, preparing magnetic composite microspheres; s4, constructing a porous silicon dioxide middle layer; and S5, introduction of a surface functionalized layer: polymerizing a monomer containing a functional group on the surface of the composite microsphere coated with a layer of porous silicon dioxide through a monomer swelling polymerization method, so as to introduce a functionalized polymer layer on the surface of the microsphere and in a porous channel, thereby obtaining the magnetic porous microsphere for in vitro diagnosis. The prepared magnetic porous microspheres are low in settling velocity, good in magnetic separation efficiency, good in monodispersity, uniform in particle size distribution, high in magnetic content, high in surface functional group content and wide in application scene.

The application relates to the technical field of floor concrete, and discloses aerated concrete applied to floor sound insulation and heat preservation and a preparation method thereof, aiming at the problems of poor structural stability of aerated concrete, poor long-acting sound insulation effect and mechanical property of existing sound insulation floor containing aerated concrete, and the aerated concrete comprises, in terms of mass fractions, 30-40 parts of fly ash, 25-35 parts of sand, 15-20 parts of phosphogypsum, 10-15 parts of quicklime, 5-8 parts of silicon-aluminum porous microspheres, 3-5 parts of slaked lime, 1-2 parts of Fe3O4@polypropylene fiber and 0.2-0.5 parts of aluminum powder; the preparation method of the silicon-aluminum porous microspheres comprises the following steps: mixing a silicon source, an aluminum source and a surfactant, uniformly stirring, obtaining silicon-aluminum homogenate; then adding nano titanium dioxide, ultrasonic dispersion, freeze-drying, then being transferred into a heating furnace, heating calcination, obtaining silicon-aluminum porous microspheres. The application realizes the support and reinforcement of pores through the gas production reaction in the material, so that the structural strength and durability of the aerated concrete are improved.

The invention belongs to the technical field of building materials, and particularly relates to an anti-seepage self-repairing material and a preparation method and application thereof. According to the material, graded porous SiOmicrospheres with functionalized surface epoxy groups are taken as a carrier, are loaded in order through space, and are coated with a hydrophobic dynamic repairing agent and a mineral reinforced precursor at the same time. A main chain of the hydrophobic dynamic repairing agent contains a dynamic disulfide bond, so that the hydrophobic dynamic repairing agent has rapid hydrophobic plugging and room-temperature self-healing capabilities; the mineral reinforced precursor can generate secondary C-S-H gel in the cracks, and long-term reinforcement is achieved. The two realize efficient cascade repair under the adjacent action of the carrier space, and the epoxy group on the carrier surface and the cement matrix form strong chemical bonding. After the material is doped into concrete, the self-repairing efficiency and the long-term durability of cracks can be remarkably improved, the material is particularly suitable for concrete structures in water conservancy, ocean and other harsh and humid environments, and the problems that an existing repairing technology product is poor in durability and an interface is prone to falling off are solved.

The application discloses a hydrophobic lignin porous microsphere / hydrophilic fiber composite filter membrane and a preparation method thereof, and relates to the technical field of composite membrane preparation.The application comprises the following steps: S1, preparing hydrophobic lignin; S2, cross-linking reaction of the hydrophobic lignin and a cross-linking agent in an organic solvent C, and then dialysis and heating solidification are sequentially performed on the cross-linked material to obtain a hydrophobic lignin porous microsphere suspension; S3, modification is performed on the hydrophobic lignin porous microsphere suspension by using sulfamic acid, N,N-dimethylformamide and papermaking fibers to obtain sulfonated cellulose, and then the sulfonated cellulose is washed and dialyzed to obtain a hydrophilic cellulose dispersion system; and S4, the hydrophobic lignin porous microsphere suspension and the hydrophilic cellulose dispersion system are stirred at a certain temperature for a period of time, and then the hydrophobic lignin porous microsphere / hydrophilic fiber composite filter membrane is obtained through suction filtration.The hydrophobic lignin porous microsphere / hydrophilic fiber composite filter membrane prepared by the application has excellent sewage treatment effect.

The invention relates to the technical field of analytical chemistry and nano sensing materials, and discloses a quantum dot microsphere fluorescent probe for trace quaternary ammonium salt detection and a preparation method thereof, and the probe is prepared from porous CdSe quantum dot microspheres, fluorescein isothiocyanate and a buffer solution. The FITC is used as an energy donor, the porous microspheres are used as an energy receptor, the FITC and the porous microspheres close the distance through electrostatic adsorption, a fluorescence resonance energy transfer system with an open initial state is constructed, and fluorescence quenching of the FITC and fluorescence enhancement of the quantum dots are shown. When quaternary ammonium salt is detected, the FITC is separated from the surface of the microsphere by utilizing a hydrophobic competitive replacement mechanism, the FRET process is blocked, the fluorescence of the FITC is recovered, and the fluorescence of the quantum dots is reduced, so that the detection is realized through the change of a ratio fluorescence signal. The method has the advantages of high detection sensitivity, good selectivity, high response speed, strong anti-interference capability and the like, and realizes rapid quantitative detection of trace long alkyl quaternary ammonium salt in a complex environment.

The invention relates to a composite porous microsphere as well as a preparation method and application thereof. The composite porous microspheres have a core part and a shell part, the core part is porous and contains a cross-linked polymer, the shell part covers at least a part of the surface of the core part and contains silicon oxide, the average particle diameter of the composite porous microspheres is 0.5-60 [mu] m, and the specific surface area of the composite porous microspheres is 150 m < 2 > / g or more. The composite porous microspheres can be used for analyzing or separating organic compounds.

The invention belongs to the field of antibacterial material synthesis, and relates to a preparation method of Ag / Pt bimetal cluster modified nitrogen / boron co-doped carbon porous microspheres and a product and application thereof.The preparation method comprises the steps that urea, boric acid, polyethylene glycol and zinc nitrate hexahydrate are evenly mixed and subjected to heat treatment in the atmosphere of air and nitrogen, and the nitrogen / boron co-doped carbon porous microspheres are obtained; placing the microspheres in a nitric acid aqueous solution, removing Zn ions in the system, reserving vacancies for subsequent Ag and Pt modification, placing the obtained sample in a mixed solution of silver nitrate and hexachloroplatinic acid, freeze-drying to ensure that the silver nitrate and hexachloroplatinic acid are uniformly attached to the interiors and surfaces of the pores of the porous microspheres, and then performing heat treatment in a hydrogen-argon mixed gas atmosphere to obtain the silver / Pt / Ag composite microspheres. And reducing silver nitrate and hexachloroplatinic acid to obtain the Ag / Pt bimetallic cluster modified nitrogen / boron co-doped carbon porous microspheres. The prepared antibacterial material is good in high-temperature stability and excellent in performance, can meet the requirements of various fields for efficient, long-acting and safe antibacterial agents, is particularly used for preparing plastic with an antibacterial function through a direct addition method or an antibacterial master batch method, can also be used for forming fibers with antibacterial and peculiar smell removal functions through a melt spinning or solution spinning process, and is suitable for industrial production. The antibacterial agent can also be dispersed in a solution to carry out post-treatment on textiles and the like so as to realize antibacterial and odor-removing functions.

The application discloses a high-loading multi-mode chromatography medium, a preparation method and application thereof. The chromatography medium comprises a chromatography matrix and a ligand. The chromatography matrix is a C 6‑20 porous microsphere with an amine group, a hydroxyl group, a carboxyl group, a sulfydryl group or a chlorine substitution on the surface; and the ligand is a hydrophobic alkenyl monomer and an alkenyl monomer with ion exchange function, and the hydrophobic alkenyl monomer and the alkenyl monomer with ion exchange function are different. The application grafts and polymerizes hydrophobic alkenyl compounds and ion exchange alkenyl compounds on the surface of the chromatography matrix. More chromatographic modes are combined by different types and different proportions of the hydrophobic alkenyl monomer and the alkenyl monomer with ion exchange function. The hydrophobicity of the ligand and the number of ion exchange groups in the prepared chromatography medium can be accurately controlled. The number of ligand binding proteins is increased by adjusting the proportion of the hydrophobic alkenyl monomer and the alkenyl monomer with ion exchange function of the chromatography medium.

The invention discloses a collagen-loaded poly-L-lactic acid porous microsphere and a preparation method thereof. According to the method, a W / O / W emulsion solvent volatilization method is adopted, an aqueous solution of recombinant III-type humanized collagen and a pore-foaming agent is used as an inner aqueous phase, a dichloromethane solution of poly-L-lactic acid (PLLA) is used as an oil phase, an aqueous solution of polyvinyl alcohol (PVA) is used as an outer aqueous phase, and the collagen-loaded PLLA porous microspheres are prepared through emulsification, solvent volatilization and aftertreatment. The microspheres can be used for injection filling, can realize immediate filling through the loaded collagen, and can stimulate self collagen regeneration for a long time through degradation of poly-L-lactic acid.

The invention provides a special light conversion agent for a light conversion adhesive film, a preparation method of the special light conversion agent and application of the special light conversion agent to a commercial light conversion adhesive film, the light conversion agent takes porous SrSi2O2N2: Eu < 2 + > microspheres as a core and SiO2 as a shell, a silane coupling agent is grafted on the surface of SiO2, and an inorganic fluorescent additive is subjected to surface modification through the silane coupling agent, so that the light conversion agent is obtained. And forming an organic binding layer of organic matrix-silane coupling agent-inorganic fluorescent powder light conversion agent. According to the method, the sites of the light conversion agent in the adhesive film are fixed and uniformly dispersed, so that the compatibility of the light conversion agent and the adhesive film matrix is greatly improved, and the stability of the light conversion effect of the photovoltaic adhesive film is improved.

The invention relates to the technical field of biomedical materials, in particular to a preparation process of absorbable styptic powder for abdominal visceral organ surgery, which comprises the following steps: reacting natural polysaccharide with a cross-linking agent to form a polysaccharide substrate material, preparing porous microspheres through emulsification and curing, mixing the porous microspheres with a degradable polymer to obtain composite particles, and drying the composite particles to obtain the absorbable styptic powder for abdominal visceral organ surgery. And surface modification is carried out. By introducing the porous microsphere structure, the controllable degradable polymer and the surface modification technology, the water absorption performance, the degradation rate and the tissue adhesion stability of the hemostatic powder are remarkably improved, meanwhile, the production process is simplified, the cost is reduced, and the clinical requirements for efficient, safe and convenient hemostatic materials are met.

The invention provides a water-permeable porous foamed PVC (polyvinyl chloride) board as well as a production method and application thereof, and the PVC board is prepared from the following raw materials in parts by weight: 90-120 parts of matrix resin, 3-8 parts of quaternary ammonium salt grafted silicon-fluorine hybrid porous microspheres, 3-8 parts of a dynamic crosslinking type elastomer, 4.3-13.0 parts of a foaming agent, 17-35 parts of a composite stable plasticizer, 3-9 parts of a processing aid and 0.1-0.3 part of an antibacterial agent. The PVC board provided by the invention has the advantages of water permeability, antibacterial property, stable structure and the like.

The invention provides a moisture-absorbing and sweat-releasing antibacterial polylactic acid fabric and a preparation method thereof.The fabric comprises a PLA base cloth layer, an electrostatic spinning film layer and a hydrophilic functional layer, the electrostatic spinning film layer is a silk fibroin / PHMB film, the hydrophilic functional layer comprises hydrophilic polyurethane and porous microspheres, and the porous microspheres are prepared from polyaspartic acid and 2, 2 '-biphenyl through a one-step spinning method. The catalyst is prepared from 2, 3-epoxypropyl-dimethyl-dodecyl ammonium chloride. The wettability difference between the PLA base cloth layer and the hydrophilic polyurethane / porous microsphere film layer is large, so that water is directionally conducted to the hydrophilic layer from the hydrophobic layer, the moisture absorption and sweat releasing functions are achieved, meanwhile, reverse osmosis of the water is prevented, and the dryness of the composite fabric is guaranteed.

This invention discloses a PVDF / PFA composite filter material for wastewater treatment and its preparation method, relating to the field of water treatment technology. In preparing the filter material, the invention first reacts N-propenylimidazolium with 1-chloro-3-phenylpropane to obtain a vinylimidazolium salt; then, alkali-treated PVDF is grafted with the vinylimidazolium salt and reacted with 5-azauracil to obtain modified PVDF; secondly, resorcinol, 3,5-dihydroxybenzoic acid, and formaldehyde are reacted to obtain porous microspheres, which are then sulfonated with chlorosulfonic acid to obtain modified microspheres; finally, PVDF, PFA, polyethylene oxide, and modified microspheres are mixed and melt-spun to prepare a fiber membrane; then, iron(III) oxide is generated in situ and activated with hypochlorous acid to obtain the PVDF / PFA composite filter material for wastewater treatment. The filter material prepared by this invention exhibits excellent antibacterial, hydrophilic, and photocatalytic degradation properties.