408 results about "Volatile solvents" patented technology

The present invention belongs to the field of high-performance materials, and discloses a PBO aerogel fiber and a preparation method thereof, comprising the following steps: (1) preparing a polyhydroxyamide (PHA) spinning solution; (2) extruding the PHA spinning solution from a spinneret into a coagulation bath to spin a PHA-PBO wet gel fiber; (3) freeze-drying the PHA-PBO wet gel fiber to obtain a PHA-PBO aerogel fiber; (4) heating the PHA-PBO aerogel fiber to obtain a PBO aerogel fiber. The above method uses a precursor PHA spinning and a volatile solvent to avoid solvent residue inside the fiber; secondly, a partial rigid skeleton structure is constructed in the wet gel fiber to avoid the collapse of the fiber structure during the drying process, so that the final aerogel fiber product has a high porosity, has the advantages of light weight, high strength, and high temperature resistance, and has potential application prospects in the fields of thermal insulation protection, sound absorption and vibration reduction, and catalyst carriers.

The invention relates to a method for preparing a polyolefin film by using a volatile solvent, which comprises the following steps: (1) weighing polyolefin resin and a volatile organic solvent, stirring and fully mixing to obtain a uniform mixed solution; (2) feeding the obtained uniform mixed solution into a double-screw extruder to obtain a high-temperature melt, and carrying out curtain coating and cooling to obtain a membrane; and (3) stretching the obtained membrane to obtain a porous membrane, and carrying out heat setting to obtain a finished product membrane. Compared with the prior art, the method has the advantages that the solvent extraction process is reduced, the porosity of the membrane is adjustable in the range of 40-85%, the preparation process is green and environment-friendly, and the method has potential application in the fields of battery diaphragms, water treatment, breathable and moisture permeable fabrics and the like.

A thermal distillation apparatus including vertical, planar evaporation surfaces on which a solution flows as thin films and which are the external surfaces of a first heat exchanger within which flows a first fluid that supplies heat to convert at least some of the volatile solvent of the solution to a vapor, vertical, planar condensation surfaces that are external surfaces of a second heat exchanger within which flows the first fluid or a second fluid that absorbs the thermal energy that is released as vapors of the solvent condensed on the condensation surfaces, air at ambient pressure between the condensation surfaces and the evaporation surfaces, means for supplying the solution to the evaporation surfaces, means for collecting the condensed vapors from the condensation surfaces, and means for collecting the unevaporated portion of the solution from the evaporation surfaces.

A thermally conductive silicone composition that has high thermal conductivity and excellent workability and misalignment resistance, and contains, in specific ratios:a silicone gel cross-linked product (A);a silicone oil (B) not containing either aliphatic unsaturated bonds or SiH groups and being used as a surface treatment agent for components (C) and (D);an aluminum powder (C) including (C-1)-(C-3),(C-1) being an aluminum powder having an average particle diameter of 40-100 μm,(C-2) being an aluminum powder having an average particle diameter of at least 6 μm and less than 40 μm, and(C-3) being an aluminum powder having an average particle diameter of at least 0.4 μm and less than 6 μm;a zinc oxide powder (D) having an average particle diameter of 0.1-10 μm; anda volatile solvent (E).

The invention belongs to the technical field of seawater desalination equipment, and particularly discloses a photothermal conversion coating capable of being used for a solar evaporator, a preparation method of the photothermal conversion coating and the solar evaporator. The specific preparation method of the photothermal conversion coating comprises the following steps: firstly, mixing the carbon nano tube, the black titanium dioxide, the dispersing agent, the defoaming agent and the volatilizable solvent to obtain mixed slurry; and then spraying the mixed slurry for multiple times by utilizing a hot air-assisted air spraying method to obtain the photothermal conversion coating for the solar evaporator. And the thickness is 30-80 [mu] m. The solar evaporator can be obtained by sequentially spraying waterborne polyurethane and a photothermal conversion coating on the substrate material with the water absorption rod. The prepared photothermal conversion coating has high hydrophilicity and high light absorption capacity, and the solar evaporator has high evaporation rate.

The invention discloses a hydroxy propyl cellulose structural color organic gel and a preparation method and application thereof.The preparation method comprises the following steps that S1, hydroxy propyl cellulose, an organic solvent with the boiling point higher than 150 DEG C, acrylic acid or acrylate monomers, a photoinitiator and the like are dispersed in a volatile solvent, after the volatile solvent volatilizes, full stirring is conducted, and the organic gel is obtained; standing for a period of time to obtain hydroxy propyl cellulose liquid crystal based organic gel pregel; and S2, carrying out light curing on the hydroxy propyl cellulose liquid crystal base pregel to obtain the hydroxy propyl cellulose structural color organic gel. The preparation method provided by the invention has the advantages of simple operation, strong operability and the like, overcomes the defect of short color retention time of a hydroxy propyl cellulose structural color hydrogel material under a non-closed condition, and can be applied to sensing, display, bionic skin, optical information storage / encryption, anti-counterfeiting, 3D printing and the like.

The invention discloses high-performance silver paste added with nano silver oxide and a preparation method of the high-performance silver paste. The high-performance silver paste comprises the following components: an organic carrier, glass powder, silver powder and an additive, the organic carrier comprises a volatile solvent and non-volatile resin; the non-volatile resin comprises ethyl cellulose, nitrocellulose, acrylic resin, polyamide wax resin and hydrogenated castor oil; the volatile solvent comprises texanol, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate, tributyl citrate, dimethyl oxalate and dimethyl silicone oil; the additive adopts nano silver oxide. The invention relates to the technical field of solar cells. Compared with silver powder, the nano silver oxide is smaller in particle size, large in specific surface area and low in tap density, the viscosity can be improved when the nano silver oxide is added into the paste, the height-width ratio of a printing grid line electrode can be improved, the shading area can be reduced, the current of a battery piece can be improved, and the photoelectric conversion efficiency of the battery piece can be improved.

The invention discloses a liquid crystal polymer film based on a covalent organic framework photo-thermal agent and a preparation method and application thereof, and the method comprises the following steps: preparing COF powder by using tetra (4-aminophenyl) porphyrin and an aldehyde monomer as raw materials; the preparation method comprises the following steps: adding COF powder and aniline into tetrahydrofuran, and carrying out ultrasonication to obtain COF nanoparticles; the COF nanoparticles and a liquid crystal mixture are evenly mixed and then heated, an evenly-mixed precursor solution is obtained, and the liquid crystal mixture is composed of liquid crystal monomers HCM 021, HCM 020 and C6M and an initiator Irgacure 651; and pouring the precursor solution into a hybridized and oriented liquid crystal box, and polymerizing under ultraviolet light to obtain the hybridized and oriented COF-liquid crystal polymer film. According to the invention, COF nanoparticles are added into a liquid crystal substrate as a photo-thermal agent, so that the COF-liquid crystal polymer film can actuate the liquid crystal polymer substrate to generate reversible curling and bending movement under the condition of volatile solvent steam or near-infrared illumination; the method has a good application prospect in the fields of mechanical execution robots, near-infrared light sensors, solvent vapor sensors and the like.

The invention relates to the technical field of coatings, in particular to an insulating coating as well as a preparation method and application thereof. The insulating paint provided by the invention comprises the following components in parts by weight: 20-60 parts of epoxy resin; the epoxy resin is selected from one or more of bisphenol A epoxy resin E-39, bisphenol A epoxy resin E-44, bisphenol A epoxy resin E-51, phenolic resin F-51 and phenolic resin F-44; 20-50 parts of an anhydride curing agent; the anhydride curing agent is selected from one or more of an HY 1235 anhydride curing agent and an EK 860 anhydride curing agent; 5-25 parts of a toughening agent; 5-15 parts of a reinforcing material; 10 to 20 parts of a diluent; and 0.1-2 parts of an accelerant. The insulating paint provided by the invention is excellent in insulating property, mechanical property, environment-friendly property and construction property through matching of the specific epoxy resin and the specific anhydride curing agent, does not contain a volatile solvent, and is specially designed for spraying the surface of a dry sleeve.

The invention relates to the technical field of waste gas separation, and discloses a low-energy-consumption recovery method and system for organic waste gas, and the method comprises the steps: analyzing the volatile solvent component concentration, concentration fluctuation data, solvent recovery energy consumption correlation factors and temperature and humidity data of the organic waste gas through multi-source coupling, and obtaining a characteristic coupling feature set; analyzing key process conditions of waste gas separation based on the feature set feed-forward situation to obtain optimal energy consumption operation parameters; the parameters and conditions of the waste gas separation process are optimized in combination with the parameters and feature set dynamic constraint, and a Pareto optimal scheme is obtained; selecting a scheme as an optimal control strategy according to separation efficiency dynamic characteristics and energy consumption stability key factors in the feature set; the digital twinning collaborative deduction control strategy and feature set is coded into a separation control instruction; based on recovery energy efficiency verification and product quality detection indexes after actual operation, performing feedback optimization to obtain a low-energy-consumption instruction generation strategy; the low-energy-consumption recovery efficiency of the organic waste gas can be improved.

The invention belongs to the technical field of liquid crystal elastomer fibers, and discloses an anti-gelling spinning method for liquid crystal elastomer fibers. The preparation method comprises the following steps: carrying out Aza-Michael reaction on a liquid crystal monomer and a sulfydryl substance to obtain an oligomer solution component A, and mixing the oligomer solution component A with a component B to obtain a precursor spinning solution; then, adjusting the concentration of a volatile solvent of the precursor spinning solution for spinning, and crosslinking and curing by ultraviolet light after spinning to obtain liquid crystal elastomer fibers; wherein the component B is a mixed solution of an anticoagulant with an active functional group and diethyl ether. The gel phenomenon in the obtained precursor spinning solution is eliminated, so that the stability and the storage property of the spinning solution are improved, and the problem that the precursor spinning solution is easy to gel and block a tube is solved. In addition, the spinning solution can break through gel point spinning and has universality, the component B serves as a cross-linking agent during UV curing, and the mechanical performance of the prepared liquid crystal elastomer fiber is enhanced.

The invention discloses a mixed matrix membrane for ammonia separation and a preparation method thereof, polyether block polyamide (Pebax) rich in ether bonds and a liquid adsorbent are dissolved in a solvent, reflux stirring is performed to obtain a membrane casting solution, then the membrane casting solution is coated on a substrate, the solvent is heated to volatilize, and the final mixed matrix membrane is obtained. Benefited from the strong ammonia gas affinity of the Pebax polyether chain segment and the liquid adsorbent, the obtained mixed matrix membrane has an efficient ammonia separation effect, and when the mixed matrix membrane is used for separating synthesis ammonia residual gas, the ammonia permeability can reach 2656.9 Barrer, and the ammonia / nitrogen selectivity and the ammonia / hydrogen selectivity reach 594.1 and 150.8 respectively.

The invention discloses a tooth whitening gel and a preparation method thereof. The tooth whitening gel comprises the following components in percentage by mass: 5%-25% of a film-forming agent, 0.1%-15% of peroxide, 0.1%-15% of a regulator and 45%-94.8% of a volatile solvent, the film-forming agent is modified ethyl cellulose, and the preparation method comprises the step of treating ethyl cellulose by adopting one or more of irradiation, illumination, oxidation, heating, mechanical pulverization and grinding to obtain the modified ethyl cellulose. The preparation method of the tooth whitening gel comprises the step of uniformly mixing the raw materials including the film-forming agent, the peroxide, the regulator and the volatile solvent to obtain the tooth whitening gel. The tooth whitening gel provided by the invention can be ensured not to be dissolved by saliva after being smeared on teeth, and can be ensured to be completely removed when being removed.

The invention provides a lamp surface composite coating and a preparation method thereof as well as an LED module and a preparation method thereof. The lamp surface composite coating comprises a coating mixture and a volatile solvent, the coating mixture comprises an ink mixture and modified inorganic matte powder in a mass ratio of (9-12): (0.5-1.2); wherein the ink mixture is prepared from the following components in parts by mass: 50 to 60 parts of epoxy resin, 25 to 35 parts of filler, 15 to 20 parts of organic solvent, 1 to 5 parts of flatting agent and 1 to 5 parts of dispersing agent; the filler comprises at least one of nano carbon spheres and modified nano carbon spheres; the modified inorganic matt powder comprises inorganic matt powder and a surface treating agent, wherein the inorganic matt powder comprises at least one of gas-phase SiO2, micronized wax, silica powder and talcum powder. The lamp surface composite coating disclosed by the invention can have good heat dissipation performance, and when the lamp surface composite coating is applied to an LED module, the heat dissipation performance and the optical performance in an LED display screen and the adhesive force between lamp beads and a lamp panel can be improved at the same time, so that the display effect of an LED is improved.

The invention provides an ionic liquid assisted pyrolysis method for regeneration of a graphite material of a decommissioned battery, and belongs to the technical field of recycling of the decommissioned battery, the ionic liquid assisted pyrolysis method comprises the following steps: soaking a pretreated graphite material in a composite ionic liquid, the composite ionic liquid comprises a component A and a component B, the component A comprises any one of imidazole ionic liquid, pyridine ionic liquid and ammonium salt ionic liquid, and the component B is fluorine-containing ionic liquid; pyrolyzing the soaked graphite material in an inert atmosphere; and cleaning and drying the pyrolyzed graphite material to obtain regenerated graphite. According to the method, the graphite in the retired battery is regenerated by adopting an ionic liquid assisted pyrolysis method, and the ionic liquid serving as a green and non-volatile solvent has good chemical stability and excellent dissolving property and can effectively promote pyrolytic reaction at low temperature, so that graphite damage possibly caused in the traditional high-temperature pyrolysis process is avoided.

The invention discloses a microwave-enhanced mixed waste textile low-temperature depolymerization recovery device and method.The microwave-enhanced mixed waste textile low-temperature depolymerization recovery device comprises a feeding system, a stirring system, a microwave catalytic depolymerization system and a condensation reflux system, the feeding system comprises feeding of mixed waste textiles, a catalyst and a solvent, the microwave catalytic depolymerization system serves as a reaction zone, reactants are heated through microwaves, and the reactants are separated from the stirring system; the condensation reflux system is communicated with the reaction area, so that a volatile solvent in the reaction can be effectively refluxed; the reactants are fed into a microwave catalytic depolymerization system according to a certain proportion to be subjected to a depolymerization reaction, a solid-liquid mixed product is obtained, and a catalyst, a natural fiber solid, a solvent and a bis (hydroxyethyl) terephthalate monomer product can be further obtained from the solid-liquid mixed product. According to the method, microwave heating and the specific catalyst are combined, gradient efficient depolymerization recovery is conducted on mixed waste textiles such as natural fiber and synthetic fiber blended materials, the recovered product is high in purity and value, and the problems that in the prior art, waste textile recovery is high in energy consumption, large in process pollutant discharge amount and the like are solved.

The production equipment comprises a shell, an opening is formed in the left side of the shell, the inner bottom wall of the shell is fixedly connected with a stripping coagulating bath tank, the inner wall of the shell is fixedly connected with a drying water bath tank, and the drying water bath tank is fixedly connected with a water outlet of the shell. Avoiding grooves are formed in the two sides of the stripping coagulating bath and the two sides of the drying water bath, the inner wall of the shell is rotationally connected with a first circulating conveying system, the surface of the first circulating conveying system is in lap joint with a PET film, the inner wall of the shell is rotationally connected with a second circulating conveying system, and the surface of the second circulating conveying system is in lap joint with a filter screen. According to the invention, the rapid curing and forming capability of a polymer in water is utilized, stripping is assisted by virtue of water surface tension, and the interface affinity is reduced by replacing a volatile solvent with small surface tension and utilizing a porous rough substrate with small contact area, so that membrane separation is facilitated; the wrinkle-free ultrathin composite film is obtained on the basis of the simple cleaning method.

The invention discloses a polyarylene ether nitrile nanofiber membrane and a preparation method of the polyarylene ether nitrile nanofiber membrane through double-solvent synergistic electrostatic spinning, and relates to the field of high polymer material preparation. The method comprises the following steps: preparing two electrostatic spinning solutions with obvious volatilization rate and dissolution parameter difference, and alternately depositing two types of fibers on a collecting surface by adopting dual-channel synergistic electrostatic spinning; in the deposition and drying process, chain segments at fiber cross points are induced to swell, mutually diffuse and cure in situ to form bonding points by utilizing the poor evaporation rate of a high / low volatile solvent and the poor solvent-polymer compatibility, so that the self-densification and the structure stabilization of the nanofiber membrane are realized. The obtained nanofiber membrane has high-density in-situ bonding points and remarkably improved mechanical properties, does not need additional post-treatment such as hot pressing or solvent spraying, and is suitable for application such as interlayer reinforcement and interface toughening of composite materials. The process has continuity and controllability, and the density and mechanical properties of the membrane body can be customized by adjusting a solvent system and spinning parameters.

The invention discloses a method for recovering rare earth in neodymium iron boron waste based on a ternary eutectic solvent, 13 HDESs composed of trioctylphosphine oxide (TOPO) as HBA and an alcohol compound as HBD are totally prepared and characterized, through optimization, batch counter-current extraction experiments are carried out by taking actual leachate as mother liquor under the optimal condition, and the recovery rate of rare earth in neodymium iron boron waste is greatly improved. HDES is used for three-stage counter-current extraction, the total rare earth concentration in mother liquor is reduced from 4389.3 mg / L to 33.5 mg / L, complete recovery of rare earth is achieved, a loaded organic phase can be stripped through 0.2 mol / L sodium oxalate, HDES after reverse extraction can enter circulation after being washed with deionized water, and the HDES still keeps good stability after five times of circulation. And roasting the back-extracted rare earth to finally form a rare earth oxide product. The process is green and clean, does not need to use toxic volatile solvents, and has a wide application prospect.

The invention relates to a method for synchronously preparing a special-shaped inorganic nanofiber membrane. The method comprises the following steps: firstly, dissolving a polymer spinning aid, an acid chloride precursor and a silicon oxide precursor in a volatile solvent, spinning the mixed solution into a membrane by adopting an electrostatic spinning technology, and carrying out high-temperature calcination on a hybrid nanofiber membrane containing the polymer spinning aid, the acid chloride precursor and the silicon oxide precursor, the special-shaped inorganic nanofiber membrane is obtained. Compared with a nanofiber membrane material prepared by an existing process technology, the special-shaped nanofiber membrane disclosed by the invention shows good gas purification performance, is high in particulate matter separation efficiency and low in filtering resistance, and provides a reference thought for related fields such as high-efficiency and low-energy-consumption air purification membrane materials and the like.

There is provided a composition for topical application to the penis for the treatment of erectile dysfunction, the composition being free of glyceryl trinitrate (GTN), sildenafil and an acetylcholinesterase inhibitor, and comprising volatile and non-volatile solvents, the volatile solvents comprising a lower alcohol and water and the non-volatile solvents comprising a polyhydric alcohol and a glycol. Preferably, the composition does not contain any pharmaceutically active ingredients for the treatment of erectile dysfunction. Also provided is a method of determining the cooling ability of a test composition, such as the composition described above.

The present invention provides a zeolite imidazolate skeleton polycrystalline membrane and a preparation method thereof, comprising: S1: preparing a precursor solution containing metal ions and organic ligands, coating the precursor solution on a carrier, and heating and cooling the carrier coated with the precursor solution to prepare an amorphous film; the precursor solution includes a metal salt, an organic ligand, and a solvent; the zeolite imidazolate skeleton material is composed of a metal node, an organic ligand A, and an organic ligand B; the organic ligand A is imidazole-2-formaldehyde or 2-methylimidazole, and the organic ligand B is selected from 2-methylimidazole, benzimidazole, 2-aminobenzimidazole, 4,5-dichloroimidazole, 2-nitroimidazole, and 4-methylimidazole-5-formaldehyde; and the solvent is methanol. S2: treating the amorphous film with steam generated by heating a polar solvent to form a crystalline film; S3: activating the crystalline film with a volatile solvent; and the present invention prepares a continuous, dense, defect-free zeolite imidazolate skeleton membrane with strong carrier binding and gas separation performance.

Disclosed are: a cosmetic composition for absorbing sebum, comprising a wax-coated porous powder comprising a porous powder and a wax coating layer formed on the surface thereof, wherein the surface of the porous powder is an outer surface and an inner surface; and a method for preparing the cosmetic composition, the method comprising the steps of: (a) forming a wax coating layer on the outer surface and the inner surface of the porous powder; (b) supporting a volatile oil inside the powder, and (c) dispersing a result product of step (a) in a non-volatile solvent.

The utility model provides a perovskite vacuum drying device. The perovskite vacuum drying device comprises a drying cavity and a placing table arranged in the drying cavity, a sealing plate is arranged on the inner top face of the drying cavity, and an air extraction opening is formed in the surface of the side, perpendicular to the sealing plate, of the drying cavity and used for being externally connected with a vacuumizing device. A plurality of air inlets are formed in the middle of the sealing plate in the air exhaust direction and used for being externally connected with air path guide pipes. A plurality of pipelines are evenly distributed on the side, facing the containing table, of the sealing plate in parallel and correspond to the air inlets. And air outlet holes are uniformly distributed in one side, facing the placing table, of each pipeline. The perovskite vacuum drying device provided by the utility model can control the local area concentration of a volatile solvent in a crystallization process, so that a high-quality perovskite thin film is obtained in each large-size area, accurate control of each crystal orientation is realized, and a large-area perovskite thin film with uniform crystal orientation is obtained.

The application provides a method for inkjet printing of oligonucleotides, and belongs to the technical field of in-situ synthesis of oligonucleotides.The method comprises the following steps: modifying the surface of a solid carrier with a chemically active functional group; depositing oligonucleotide synthesis reagents onto the surface of the modified solid carrier by inkjet to perform in-situ synthesis; and the solvent in the oligonucleotide synthesis reagents comprises one or two of glutaronitrile, acetonitrile and propylene carbonate.The application uses a new type of difficult-to-vaporize solvent, greatly reduces the volatilization of reagents during inkjet synthesis and the generation of organic vapors during synthesis, and thus maintains a high in-situ synthesis reaction efficiency of oligonucleotides.

The present invention relates to body adhesive formulations. In particular, body adhesives that are water resistant yet are washable and removeable by way of washing in water in accordance with the ga

The present invention relates to a compacted powder comprising at least: a) an oily phase in an amount of at least 10% by weight relative to the total weight of the composition, said oily phase comprising at least one non-volatile oil; and b) a powdered phase in an amount of at least 40% by weight relative to the total weight of the composition, said powdered phase comprising at least: i) perlite; and ii) at least one spherical filler selected from the group consisting of mineral fillers, organic fillers of natural origin, and mixtures thereof; and iii) at least one particulate colorant; and c) at least one amorphous hydrocarbon-based block copolymer; and d) at least one pigment; the composition is free of talc particles or mica particles in free form and is obtainable via a process comprising the steps of: 1) mixing the oil phase, the amorphous hydrocarbon-based block copolymer, the powdered phase and at least one volatile solvent to form a slurry; and 2) injecting the slurry into a container and shaping it by compaction, in particular pressing and / or suction.

The invention discloses a polyester polymer microsphere containing hyaluronic acid (sodium) and a preparation method of the polyester polymer microsphere, the hyaluronic acid (sodium) is dispersed in a microsphere body, and the hyaluronic acid (sodium) accounts for 2-20% of the weight of the polyester polymer microsphere. The preparation method of the microspheres comprises the following steps: dispersing hyaluronic acid (sodium) in a polyester polymer solution in a non-solution form to obtain a polyester polymer solution in which hyaluronic acid (sodium) is dispersed; the step of dispersing the hyaluronic acid (sodium) in the non-solution form is that the hyaluronic acid (sodium) is dispersed in the form of solid particles or a solid particle suspension; in the polyester polymer solution, the solvent for dissolving the polyester polymer is a volatile solvent. The microspheres provided by the invention can wrap hyaluronic acid (sodium) with higher content, and have better stability.

An example method for making an optical element comprises: (a) receiving in a printing device a plurality of liquids, each including a volatile solvent, wherein one or more of the liquids also includes a suspension of particles or a sol-gel precursor; (b) receiving in the printing device a plurality of print maps corresponding to the plurality of liquids, each print map defining a pattern of application of the corresponding liquid for a series of pre-sintered layers of the optical element; (c) for each pre-sintered layer, operating the printing device to: (i) deposit the plurality of liquids according to the patterns defined in the plurality of print maps for that pre-sintered layer, and (ii) dry the pre-sintered layer; and (d) sintering the series of pre-sintered layers to form a vitreous monolith comprising the optical element.

The invention discloses a coating preparation method capable of regulating and controlling the morphology of a coating. The coating preparation method is used for spraying on an instrument. A drug solution used in the preparation method of the coating comprises at least one solvent, a drug active ingredient and an excipient in a preset proportion are added into the solvent, when only one solvent is used, the solvent is a polar and high-volatility solvent A, stirring and ultrasonic oscillation are carried out at room temperature so as to uniformly dissolve the solvent A, and the drug solution is obtained, when the medicine solution is sprayed, the spraying flow and the moving speed of a spray head are adjusted through external spraying equipment according to a preset standard so as to spray at least one layer of medicine solution on an external instrument, and therefore the preset coating morphology is formed on the surface of the instrument through the medicine. The method has the advantages that the microstructure of the coating can be controlled to improve the stability of the coating; therefore, the release effect of the medicine is ensured, and the release behavior and the tissue retention time of the medicine in various lumen stenosis diseases can meet the delivery requirements required by clinical treatment.