291 results about "Porous microspheres" patented technology

According to the adjustable and controllable silk fibroin porous microspheres and the preparation method thereof, the microspheres with the size of 20 microns to 1 mm are prepared by adjusting technological parameters for preparing the microspheres. Pores are of a nano-submicron-micron multi-stage composite pore structure, and the porous microspheres have elasticity. The method provided by the invention shows wide application potential in the aspect of preparing silk fibroin microspheres with diversified sizes, and the microspheres have remarkable advantages in application scenes of medical injectable microspheres and medical embolism microspheres due to unique physical and chemical characteristics; the method has remarkable application value in multiple fields.

The invention provides spherical porous carbon as well as a preparation method and application thereof, and relates to the technical field of porous carbon materials. The preparation method provided by the invention comprises the following steps: carrying out spray drying on a phenolic resin solution in which lithiates and borides are dissolved to obtain resin microspheres; pre-oxidizing the resin microspheres at the temperature of 150-300 DEG C to obtain a carbon sphere precursor; carbonizing the carbon sphere precursor in an inert atmosphere at the temperature of 1000-1200 DEG C to obtain carbon microspheres; performing cyclic activation and pore forming on the carbon microspheres in an active atmosphere of 800-1000 DEG C to obtain porous microspheres; and reducing the porous microspheres in a reducing atmosphere of 400-600 DEG C to obtain the spherical porous carbon. The spherical porous carbon material with developed micropores and high specific surface area can be prepared, meanwhile, the coulombic efficiency is high, the conductivity is good, the used preparation method is simple and efficient, and large-scale industrial production is facilitated.

The invention belongs to the field of modified self-repairing calcium aluminate cement 3D printing, and particularly relates to a phosphate modified self-repairing calcium aluminate cement 3D printing material and a preparation method thereof. The phosphate modified self-repairing calcium aluminate cement 3D printing material prepared by the invention is prepared from the following raw materials in parts by mass: 60 to 70 parts of calcium aluminate cement, 3 to 7 parts of silica fume, 2 to 4 parts of metakaolin, 0.5 to 3.5 parts of double-template modified calcium bentonite, 0.8 to 1.5 parts of amino modified sodium polyphosphate and 0.15 to 0.8 part of basalt fiber. The invention relates to a concrete anti-microbial agent, which is prepared from the following raw materials in parts by weight: 20-30 parts of water, 20-30 parts of water, 20-30 parts of water, 20-30 parts of nano calcium carbonate, 20-30 parts of nano calcium carbonate, 20-30 parts of magnesium phosphate cement coated bacteria-loaded porous microspheres, 20-30 parts of a polycarboxylate superplasticizer, 20-30 parts of an organic silicon defoaming agent and 25-35 parts of mixing water. The technical-economic cooperation requirement of building 3D printing under complex working conditions is met, and various indexes of phosphate modified calcium aluminate cement applied to the 3D printing technology are met.

The invention discloses a preparation method of a cell inflammatory factor adsorbent, which comprises the following steps: mixing styrene, divinyl benzene and hydroxyethyl acrylate, and adding a pore-foaming agent and mesoporous SiO2 nano powder to prepare a porous microsphere carrier; the preparation method comprises the following steps: mixing chitosan and poly (N-isopropylacrylamide) in an acetic acid solution to obtain a temperature-sensitive chitosan hydrogel precursor solution; the preparation method comprises the following steps: activating the surface of a porous microsphere carrier by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide, mixing the activated porous microsphere carrier and a temperature-sensitive chitosan hydrogel precursor solution to obtain a water phase, and assembling, washing and drying in an oil phase to obtain the cell inflammatory factor adsorbent. Through the design of the core-shell structure and the addition of the mesoporous SiO2 nano powder, the temperature response characteristic and the recyclable characteristic are given to the cell inflammatory factor adsorbent, the adsorption capacity of cell factors is also improved, and a new solution is provided for physical adsorption of the cell inflammatory factors.

The invention relates to the technical field of catalyst materials, and particularly discloses a high-stability hydrogenation catalyst and a preparation method thereof. The invention relates to a preparation method of a high-stability hydrogenation catalyst, which comprises the following steps: preparing a hollow porous microsphere as an inner core from amino-terminated hyperbranched polyaryletherketone and polyvinyl alcohol, and then coating the porous microsphere with a mesoporous silicon dioxide intermediate layer by a sol-gel method; and finally, forming an Mg-Al hydrotalcite layer on the outermost side through a coprecipitation method, dipping and modifying with La (NO3) 3 and Ce (NO3) 3 solutions to obtain a catalyst carrier, dipping the catalyst carrier in an active metal dipping solution, and drying to obtain the catalyst. The high-stability hydrogenation catalyst provided by the invention has excellent mechanical properties and more reaction active sites, has high catalytic activity and catalytic efficiency, and is relatively long in catalytic life.

The invention discloses an organic wastewater adsorbent as well as a preparation method and application thereof, and belongs to the technical field of sewage treatment. Comprising the following steps: carrying out nitration reaction on styrene porous microsphere resin, and then carrying out reduction reaction to obtain amino-modified porous microsphere resin; the preparation method comprises the following steps: carrying out polymerization reaction on high-nitrogen-content amino organic small molecules and aldehyde group small molecules under the action of a basic catalyst in an adsorption polymerization manner to generate a nitrogen-doped organic porous polymer, and coating the surface of amino-modified porous microsphere resin with the nitrogen-doped organic porous polymer to obtain the organic wastewater adsorbent. The porous microsphere resin adsorbent with large adsorption capacity and high organic matter removal rate is synthesized by using the carrier advantage of styrene microsphere resin and introducing a porous heteroatom polymer on the microsphere resin. When the adsorbent is used, the adsorbent is directly added into an organic wastewater solution, and the removal rate of bisphenol A, aniline and tetracycline can reach 90% or above.

The invention discloses a wet oxidation catalyst as well as a preparation method and application thereof, and belongs to the field of wastewater treatment. Styrene porous microsphere resin is used as a raw material, under the action of a catalyst, polyfunctional aldehyde group small molecules and polyfunctional cyano group small molecules are subjected to a Knoevenagel reaction in an adsorption polymerization mode, the surface of the styrene porous microsphere resin is coated with a layer of conjugated carbon organic porous polymer, and the conjugated carbon organic porous polymer is prepared. Forming conjugated carbon coated porous microsphere resin; then carrying out sulfonation reaction to obtain sulfonic acid group modified conjugated carbon coated porous microsphere resin; and then dipping in a noble metal salt solution to form a resin metal compound, and then filtering, washing and drying to obtain the wet oxidation catalyst. The catalyst can be used for catalytic oxidation degradation of organic wastewater, bisphenol A is used as simulated organic wastewater, and the removal rate of treated bisphenol A is 95% or above.

Aiming at the problem that a conventional mask cannot absorb large cells through natural permeation, the invention provides the preparation method of the nano-microsphere cell active factor mask, and the nano-microsphere cell active factor mask is prepared through the processes of preparing an emulsion system, solidifying small liquid drops, alkalizing materials such as polymer collagen / chitosan microspheres, stirring to prepare a nano-microsphere cell active stock solution and the like. According to the prepared polymer collagen / chitosan porous microspheres, cell active factors are diffused into the pore diameters of the microspheres, the permeability of active factor cells is improved through a microsphere carrier, and proliferation and growth of skin epidermal cells are greatly promoted.

The invention relates to the technical field of floor slab concrete, and discloses aerated concrete applied to sound insulation and heat preservation of a floor slab and a preparation method of the aerated concrete aiming at the problems that an existing sound insulation floor slab containing the aerated concrete is poor in structural stability, namely the sound insulation effect and the long-term effect of mechanical properties are poor and the like. Comprising 30-40 parts of fly ash, 25-35 parts of sand, 15-20 parts of ardealite, 10-15 parts of quick lime, 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 part 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, and uniformly stirring to obtain silicon-aluminum homogenate; and adding nano titanium dioxide, carrying out ultrasonic dispersion and freeze drying, transferring into a heating furnace, and heating and calcining to obtain the silicon-aluminum porous microspheres. The supporting and strengthening effects on pores are realized through gas production reaction and the like in the material, so that the structural strength and durability of the aerated concrete are improved.

The invention provides a porous bio-based polymer microsphere as well as a preparation method and application thereof. The porous bio-based polymer microsphere provided by the invention comprises a mixture of a bio-based high-molecular polymer P1 and a bio-based block copolymer P2, wherein the bio-based block copolymer P2 is a bio-based block copolymer of which the end-capped group at one end is a hydrophilic group and the end-capped group at the other end is a hydrophobic group. The porous microspheres are prepared by adopting a method of combining condensation phase separation, solvent replacement and solvent volatilization, the obtained microspheres are uniform and stable, the pelletizing rate of the microspheres is nearly high, the yield is high, and subsequent screening is not needed; the process is simple, and the difficulty in operation and control of the process caused by introduction of multiple water phases / oil phases is reduced.

The invention discloses lanthanum ferrite with a hollow porous microsphere structure as well as a preparation method and application thereof, and belongs to the technical field of gas sensitive materials. The lanthanum ferrite (LaFeO3) material is synthesized by adopting a hydrothermal method and heat treatment combined method, and the obtained lanthanum ferrite (LaFeO3) material can work under a high-temperature condition, so that the gas-sensitive property of the material is effectively improved. Meanwhile, the synthesis process is simple, the repeatability is good, the practicability and economical efficiency are high, and the high reference and application value is achieved in the field of preparation and research of gas sensitive materials; the problems that a traditional lanthanum ferrite preparation method is tedious, time-consuming and high in cost, and prepared lanthanum ferrite (LaFeO3) is low in cation and oxygen vacancy containing capacity, poor in carrier transport and oxidation reduction performance and the like are solved.

The invention relates to the technical field of road engineering materials, in particular to a blade glass fiber regenerated RPC type wear-resistant and rut-resistant rubber and plastic composite auxiliary material. The material is prepared from the following components in parts by weight: 40 to 60 parts of regenerated polyethylene, 20 to 40 parts of modified wind driven generator blade regenerated glass fiber powder, 10 to 20 parts of rubber powder, 3 to 8 parts of maleic anhydride grafted polyethylene, 5 to 10 parts of styrene-butadiene-styrene block copolymer (SBS), 1 to 3 parts of polyethylene wax and 5 to 10 parts of calcium powder. The preparation process of the modified regenerated polyethylene comprises the steps of isocyanate esterification and porous microspheroidization. The modified wind driven generator blade regenerated glass fiber powder is prepared by performing acid etching on wind driven generator blade regenerated glass fiber powder, performing plasma activation, and compounding polyfunctional group titanate and a polyamino silane coupling agent. The leaf glass fiber regenerated RPC type wear-resistant and rut-resistant rubber and plastic composite auxiliary material prepared by the preparation method disclosed by the invention has the advantages that various properties of an asphalt pavement are remarkably improved, meanwhile, green cyclic utilization of waste resources is realized, and remarkable economic and social benefits are achieved.

The invention discloses graded particle zirconia ceramic and a preparation method thereof.The graded particle zirconia ceramic comprises nano zirconia powder and porous microspheres, each porous microsphere is internally provided with a closed and / or communicated and through microporous structure, the particle size of each porous microsphere is 10-200 micrometers, and the particle size of each porous microsphere is 10-200 micrometers. And the aperture of the internal micropores is 0.3-1 [mu] m. According to the invention, the porous microsphere introduces a microporous structure into the graded particle ceramic, and the distribution of the microporous structure is consistent with that of the calcined microsphere in the graded particle ceramic, so that when the ceramic is damaged and the crack expands to a microporous area, the micropores at the tip of the crack bear larger stress due to a stress concentration effect; the microcrack toughening agent can induce main crack bifurcation or deflection, consumes crack propagation energy, prolongs a crack propagation path, and has an obvious microcrack toughening effect, so that the fracture toughness of the ceramic is improved.

The invention discloses a magnetic porous microsphere for in-vitro diagnosis and a preparation method of the magnetic porous microsphere, and belongs to the technical field of preparation of micro-nano materials. According to the invention, styrene is used as a polymerization monomer, and a dispersion polymerization method is adopted to prepare monodisperse polystyrene microspheres; ferric chloride and ferrous sulfate are selected as precursors, magnetic nanoparticles are synthesized through a coprecipitation method under the alkaline condition, the initial loading capacity is changed, the magnetic nanoparticles are loaded on the surfaces and in pore channels of polymer porous microspheres through a multi-step seed growth method, and the magnetic nanoparticles are prepared. The composite magnetic polystyrene microspheres with high magnetic content, good magnetic responsiveness and superparamagnetism are synthesized; finally, functional groups are introduced to the surfaces of the magnetic spheres by monomers containing the functional groups through a monomer swelling polymerization method, and the prepared magnetic porous microspheres have the advantages of uniform particle size, small coefficient of variation and large specific surface area, and can be better combined with antigens and antibodies, so that in-vitro diagnostic function detection such as nucleic acid extraction and chemiluminescence is carried out.

The invention provides a high-flux porous microsphere for chromatography and a preparation method thereof, and the preparation method of the high-flux porous microsphere for chromatography comprises the following steps: respectively dissolving agarose and aminated glucan in water, and uniformly mixing an agarose solution and an aminated glucan aqueous solution to obtain an aqueous phase; adding the water phase into the oil phase containing the emulsifier, and stirring and emulsifying at 70-90 DEG C for 30-90 minutes to obtain a mixed solution; cooling the obtained mixed solution to 20 DEG C or below at a speed of 1-5 DEG C / min, and curing into a ball to obtain a microsphere; and adding NHS-PEG-COOH into the obtained microspheres, carrying out a primary cross-linking reaction, adding epoxy chloropropane into the obtained microspheres, and carrying out a secondary cross-linking reaction to obtain the high-flux porous microspheres for chromatography. According to the preparation method of the high-flux porous microspheres for chromatography, the separation efficiency of the obtained porous microspheres can be improved, and relatively high dynamic adsorption capacity can still be realized at a high flow rate.

The invention relates to the field of coatings, in particular to a solvent-free epoxy coating for a drinking water tank and a preparation method thereof.The solvent-free epoxy coating is prepared from a component A and a component B. The component A comprises 40-60 parts of epoxy resin, 5-20 parts of reactive diluent, 0.3-0.5 part of dispersing agent, 0.1-0.8 part of defoaming agent, 0.6-1.2 parts of thixotropic agent, 20-35 parts of pigment and 10-20 parts of filler; the epoxy resin comprises bisphenol A epoxy vinyl ester resin and hydrogenated bisphenol A resin; the active diluent comprises a cardanol-based active diluent and 4-epoxy isoeugenol; the dispersing agent comprises a polymeric dispersing agent and polyurethane acrylate porous microspheres; the component B comprises a modified alicyclic amine curing agent and cardanol carbamate, and the mass ratio of the modified alicyclic amine curing agent to the cardanol carbamate is (1.8-5): 1; the amine value of the modified alicyclic amine curing agent is 360 to 420 mgKOH / g. The solvent-free epoxy coating for the drinking water tank is non-toxic, has relatively strong adhesive force, water resistance, flexibility and antibacterial property and relatively long service life, and is suitable for various drinking water tanks.

The invention relates to the technical field of biological materials, in particular to a PDRN porous microsphere as well as a preparation method and application thereof. The PDRN porous microspheres are prepared from the following raw materials: PDRN, an oil phase matrix, a curing agent and metal salt, the curing agent is at least one of polyethylene glycol acrylate and polylysine; the metal salt is at least one of calcium chloride, zinc chloride, magnesium chloride and ferric chloride. The PDRN porous microsphere has the advantages of being controllable in size, excellent in disintegration resistance and excellent in swelling resistance, is high in moist heat sterilization tolerance and strength, can be used as a filling material for medical beauty or an ideal candidate material of a tissue engineering scaffold, and has potential application value.

The invention relates to the technical field of lithium adsorbents, in particular to a preparation and application method of a porous microsphere adsorbent for extracting lithium, and the preparation method comprises the following steps: preparing a water phase solution containing methacrylic acid, water and an emulsifier; the preparation method comprises the following steps: preparing an oil phase solution containing a fluorinated methacrylate monomer containing beta-diketone, cyclohexyl methacrylate, methoxyethyl methacrylate, N, N-bis (acryloyl) cystamine, ethylene glycol dimethacrylate, azodiisobutyronitrile and a solvent; dropwise adding the oil-phase solution into the water-phase solution for gradient emulsification, adding sodium persulfate to initiate polymerization, and performing centrifugal drying to obtain porous microspheres; and immersing the porous microspheres into a NaOH solution for hydrolysis activation, and drying to obtain the porous microsphere adsorbent for selective adsorption of lithium ions. Wherein the beta-diketone can enhance the targeted adsorption effect of the adsorbent on lithium ions and has relatively high selectivity and adsorption capacity, and the strong electron-withdrawing property of CF3 further polarizes carbonyl and enhances the coordination ability of the lithium ions.

The invention discloses an ozone catalyst and a preparation method and application thereof, and belongs to the field of wastewater treatment.The preparation method comprises the following steps that aromatic organic small molecules containing heteroatoms are subjected to a coupling reaction under the action of the catalyst in an adsorption polymerization mode to generate an aromatic heteroatom polymer, and the aromatic heteroatom polymer is obtained; the surface of the styrene type porous microsphere resin is coated with the coating liquid; then dipping in an aqueous solution containing a metal salt A and a metal salt B, and carrying out metal ion loading; and finally, carrying out reduction reaction on the metal ion coordinated composite resin to obtain the metal monatomic composite resin material. The ozone catalyst disclosed by the invention is used for carrying out ozone catalytic oxidation treatment on organic wastewater, and the highest removal rate of bisphenol A can reach 87.6%.

The invention relates to the technical field of glucose detection, in particular to a high-sensitivity glucose detection material and a preparation method thereof. The preparation raw materials of the high-sensitivity glucose detection material comprise the following components in parts by weight: 1-2 parts of modified glucose oxidase, 6-10 parts of modified porous microspheres, 1-1.5 parts of chloroplatinic acid and 0.6-1 part of palladium acetate. The prepared detection material is high in detection sensitivity and good in repeatability and stability.

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 invention relates to the field of biological materials, in particular to a preparation method of magnetic microspheres and amino and / or carboxyl magnetic microspheres. The invention provides a preparation method of magnetic microspheres, which comprises the following steps: carrying out first polymerization reaction on styrene in the presence of an initiator to obtain polystyrene seed microspheres; swelling the seed microspheres in the presence of a pore-foaming agent, a monomer and an initiator to generate a second polymerization reaction; extracting and washing to obtain porous microspheres; modifying carboxyl on the inner and outer surfaces of the porous microspheres through a third polymerization reaction, mixing with iron ions, and coprecipitating to obtain the monodisperse superparamagnetic microspheres. The magnetic microspheres provided by the invention have monodispersity and superparamagnetism, and the particle size and the magnetic content of the magnetic microspheres can be regulated and controlled as required; the surface of the microsphere is rich in amino or carboxyl functional groups, and the content range of amino and carboxyl can be regulated and controlled according to the requirements of coupled protein; the method can be widely applied to the fields of in-vitro detection, biomedical research, protein separation and purification, cell sorting and the like.

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 discloses a PVDF / PFA composite filter material for sewage treatment and a preparation method of the PVDF / PFA composite filter material, and relates to the technical field of water treatment. When the filtering material is prepared, firstly, N-propenylimidazole and 1-chloro-3-phenylpropane react to prepare vinyl imidazolium salt, PVDF subjected to alkali treatment is grafted with the vinyl imidazolium salt, then the PVDF and 5-aza-uracil react, and modified PVDF is obtained; secondly, enabling resorcinol, 3, 5-dihydroxybenzoic acid and formaldehyde to react to obtain porous microspheres, and sulfonating the porous microspheres through chlorosulfonic acid to obtain modified microspheres; finally, PVDF, PFA, polyoxyethylene and the modified microspheres are mixed and subjected to melt spinning, and a fiber membrane is prepared; and carrying out in-situ generation of ferroferric oxide, and activating with hypochlorous acid to obtain the PVDF / PFA composite filter material for sewage treatment. The filter material prepared by the invention has good antibacterial, hydrophilic and photocatalytic degradation properties.

The invention discloses a feed for feeding cordyceps sinensis host hepialus larvae as well as a preparation method and application of the feed, and relates to the technical field of artificial feeds. The feed comprises the following components in parts by weight: 5-20 parts of beer yeast powder and / or casein, 30-80 parts of wheat germ powder, 20-40 parts of carrot powder, 0.2-5 parts of a modified preservative, 0.05-0.2 part of antibiotics, 0.2-5 parts of vitamins, 0.01-1 part of edible oil, 6-15 parts of agar and 200-400 parts of water. The modified preservative is composed of a chitosan oligosaccharide-natamycin compound subjected to plasma activation treatment and potassium sorbate according to the ratio of 1: 3-1: 5; a modified preservative composed of a chitosan oligosaccharide-natamycin compound subjected to plasma activation treatment and potassium sorbate is adopted, a porous microsphere structure is formed through a specific preparation process, and the contact area of the preservative and the feed is greatly increased. Agar and water form a gel matrix at a specific temperature, and nutritional ingredients and the like are injected into a coaxial micro-fluidic device, so that the preservative effect of the feed is remarkably enhanced.

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 method for preparing PDLLA porous microspheres with high porosity and uniform particle size distribution in batches, and belongs to the technical field of polymer biomedical material preparation. According to the method, an ultrasonic-assisted double-emulsification system is combined with an inner water phase (an ammonium bicarbonate solution), an oil phase and an outer water phase (a polyvinyl alcohol solution), and a staged curing process is adopted to realize accurate regulation and control of a pore structure and a particle size. Petroleum ether is introduced as a poor solvent to optimize the precipitation uniformity, ultrasonic and mechanical stirring synergistically improve the emulsification uniformity, and staged curing ensures that the solvent evaporation rate is matched with pore formation. The porosity of the prepared PDLLA microspheres reaches 75%-87%, the SPAN value is as low as 0.512, the pore size distribution is uniform, the process expandability is high, and the method is suitable for the biomedical fields of drug carriers, tissue engineering scaffolds and the like. The technical problems of low porosity, wide particle size distribution and complex process are solved, and the method has a remarkable application prospect.

The invention belongs to the technical field of adsorption materials, and discloses an ammonia gas adsorption material based on bimetallic MOF / resin and a preparation method of the ammonia gas adsorption material. Comprising the following steps: adding styrene sulfonate, an initiator and a Cu / Co bimetal MOF material into water, and carrying out ultrasonic dispersion to obtain an aqueous phase solution; uniformly stirring a vinyl monomer and a liquid pore-foaming agent to obtain an organic phase solution; and mixing the aqueous phase solution with the organic phase solution, carrying out heating polymerization under a stirring condition, removing the liquid pore-foaming agent to obtain porous microspheres, and carrying out protonation to obtain the ammonia gas adsorption material based on the bimetallic MOF. The composite adsorption material disclosed by the invention has a relatively high specific surface area, can expose more active sites, and has high removal efficiency on ammonia gas; and the preparation cost is low, the period is short, and the method is suitable for popularization and application.