769results about How to "Volatile fast" patented technology

The invention relates to a method and a device for desulfurizing exhaust smoke of a sea-going ship, which uses sea water to reduce discharge of sulfur dioxide and other pollutants of the sea-going ship. The method comprises the following steps of: sea water scrubbing, acidic sea water transferring, acid separating treatment, water discharge and so on. The device comprises a scrubber and a water-saving acid separator, wherein, the upper part of the scrubber is provided with a scrubbing layer, and is communicated with a scrubbing sea water pump through a pipeline; the lower part of the scrubber is provided with a cooling layer; one end of the scrubber is communicated with a smoke exhaust pipe of a ship engine through a scrubbing inlet pipe, while the other end of the scrubber is connected with a scrubbing exhaust pipe; the lower part of the scrubber is communicated with the water-saving acid separator; and the water-saving acid separator is connected with a mixed sea water pump, a draught fan and a main discharge pipe for suitably discharging sea water which is subject to the acid separating treatment. The method and the device have the advantages of high desulfurizing efficiency, small sea water consumption, low equipment manufacturing cost and low running cost.

The invention belongs to the field of liquid silicone rubber, and particularly relates to single-component heat-curing liquid silicone rubber and a preparation method thereof. Ethenyl polysiloxane is used as base rubber, hydrogen polysiloxane is used as a cross-linking agent, a complex of transition metal platinum is used as a catalyst, an alkynol mixture is used as an efficient polymerization inhibitor, aluminum oxide and aluminium nitride are used as heat conductive fillers, a silane coupling agent is used as a tackifier, aluminium hydroxide is used as a fire retardant, and fumed silica is used as a reinforcing agent. As a process is strictly controlled, and a process route that raw materials are treated and dried in advance, and mixed at room temperature to prepare the rubber is adopted, the low-viscosity single-component heat-curing silicone rubber is prepared. The fire retardant single-component heat-curing liquid silicone rubber can be stored for a long term at normal temperature, is low in viscosity, single in component, good in heat conductivity and temperature tolerance, and good in adhesion with a base material.

The invention discloses a rapid-heating-assisted ultrasonic stripping method for a two-dimensional nanometer Ti3C2 lamella, relates to a method for stripping a two-dimensional nanometer Ti3C2 lamella, and aims at solving the problem of poor stripping effect of the existing method for stripping the two-dimensional nanometer Ti3C2 lamella. The method comprises the steps of firstly, preparing Ti3AlC2 powder; secondly, preparing stacked lamellar Ti3C2Tx powder, and then, immediately placing the stacked lamellar Ti3C2Tx powder into a thermal treatment furnace after vacuumizing; then, adding the powder in a pipe into an organic solvent after cooling, and centrifuging after stirring to obtain a solid substance; and vibrating and dispersing after adding deionized water into the solid substance, filtering to obtain a powdery sample, and drying to obtain the two-dimensional nanometer Ti3C2 lamella. The ratio of single-layer or n-layer nano lamellas in the two-dimensional nanometer Ti3C2 lamella stripped by using the method disclosed by the invention is relatively high (n<10). The rapid-heating-assisted ultrasonic stripping method for the two-dimensional nanometer Ti3C2 lamella is applied to the fields of synthesis and preparation of nano ceramic materials.

An improved cleaning composition and method adapted to clean a variety of hard surfaces. The improved cleaning composition and method includes the use of a cationic biocide that includes biguanide compounds and / or quats.

The invention provides an alignment film drying device and method which are used for drying an alignment film material which is formed on a first surface of a substrate and diluted by a solvent. The device comprises a heating table, a peripheral support mechanism, multiple support pins and a lifting mechanism, wherein the heating table is used for heating a second surface of the substrate, and multiple air holes are uniformly distributed on the heating table; the peripheral support mechanism is arranged around the heating table and used for supporting the edge of the second surface of the substrate; the multiple support pins are uniformly distributed in the upper surface of the heating table; and the lifting mechanism controls the periphery support mechanism and the support pins to perform lifting. According to the invention, the phenomenon of drying non-uniformity in the drying process of the alignment film can be eliminated, the quality of the alignment film is optimized, the display characteristics of a liquid crystal panel are enhanced, and the quality and acceptability of the liquid crystal panel are improved.

The invention relates to a method for dyeing textile by dye liquor prepared by mutually dissolving organic solvent and water and belongs to the technical field of textile printing and dyeing processing. The dye liquor applies organic solvent soluble in water and lower than water in boiling point, and dye is soluble in water and insoluble in organic solvent, so that effective liquor ratio is lowered, distribution coefficient of dye on fiber is changed, and dye uptake is of dye is increased. Adding the organic solvent allows boiling point of the dye liquor to reduce, energy is saved, water consumption in dyeing process is greatly reduced, the organic solvent can be recycled and reused, and discharge of waste liquor is reduced. The dyeing process includes performing twice-soaking and twice-rolling accelerant solution to textile, and solid accelerant is prevented from being precipitated out at a great amount by being added in dyeing process. The method is low in water consumption, utilization rate of dye is increased, energy consumption is low, the organic solvent can be recycled and reused, and cleaning and dyeing are achieved simultaneously.

The present invention relates to a method for producing nanofibers with an excellent fiber formation property, characterized in that: when nanofibers 3 having a thickness of a nano level are produced by electrostatically spinning a spinning liquid 1 of a polymer resin solution on a collector 8 through a nozzle 2 under a high voltage, a collector 8 with a heater is used as the collector. The present invention can greatly improve the fiber formation property of the nanofibers.

Chemical vapor deposition (CVD) precursor compositions for forming metal oxide high dielectric constant (κ) thin films. The precursor composition in one embodiment comprises a metal precursor having a general formula M(β-diketonate)2(OR)2, wherein M is Hf, Zr or Ti, and R is t-butyl. The precursor composition may also comprise a solvent medium selected from the group consisting of ethers, glymes, tetraglymes, amines, polyamines, alcohols, glycols, aliphatic hydrocarbon solvents, aromatic hydrocarbon solvents, cyclic ethers, and compatible combinations of two or more of the foregoing.

The invention relates to a method for sorting dry and cool knitted underwear or shell fabrics, comprising the steps of: (1) preliminary treatment according to a conventional method of the enterprise; (2) washing with water; (3) the sorting of a temperature-sensitive type micro-capsule with hydrophobic core material; and (4) post-processing by using a hydrophilic agent. The underwear produced by using the method of the invention has good wet permeability and drying functions, can not only absorb the sudor perspired from the skin of a human body, but also drain the water in the clothes, thus causing the human body to be dry, cool and comfortable.

The invention belongs to the field of liquid silicone rubber and particularly relates to one-component heating-cured liquid silicone rubber and a preparation method thereof. According to the one-component heating-cured liquid silicone rubber, vinyl polysiloxane is taken as base rubber, hydrogen-based polysiloxane is taken as a cross-linking agent, a complex of transition metal platinum is taken as a catalyst, an alkynol mixture is taken as a high-efficiency polymerization inhibitor, aluminum oxide and aluminum nitride are taken as heat conducting filler, a silane coupling agent is taken as a thickening agent, aluminum hydroxide is taken as a fire retardant, and fumed silica is taken as a reinforcing agent. Technologically, strict control is adopted, a process route that raw materials are preprocessed and dried and then are subjected to rubber preparation after normal-temperature mixing is adopted, and the one-component heating-cured liquid silicone rubber is prepared. The one-component heating-cured liquid silicone rubber can be stored at the normal temperature for long time, is low in viscosity, good in heat conductivity, good in temperature endurance and good in substrate adhesion property and has one component and flame retardancy.

The invention discloses graphene composite conductive ink for ink-jet printing and a preparation method thereof. The graphene composite conductive ink comprises the following ingredients (by weight): 1-30 parts of graphene, 0.1-15 parts of multi-walled carbon nanotube, 0-7.5 parts of conductive carbon black, 290-320 parts of a mixed solvent, 0.2-10 parts of a surfactant, and 0.2-15 parts of a binder. The preparation technology is simple and feasible. According to the preparation technology, a series of steps that are hard to operate, such as tedious covalent modification, dipolar addition reaction, diazonium salt coupling, solvent exchange, etc. in the prior art are omitted; but by direct one-step grinding and mixing, the surface of a conductive filler is coated with the surfactant to prepare graphene ink with good dispersion. No poisonous reagents are used during the preparation process. The preparation method is suitable for industrial large-scale production.

The invention discloses perovskite solar cell conductive carbon paste which comprises organic solvents, binders and conductive filling materials. The conductive carbon paste further comprises inorganic additives. The inorganic additives are ZrO2 or NiO powder. By mass percent, the conductive carbon paste comprises 6%-15% of binders, 14%-20% of conductive filling materials and 3%-5% of inorganic additives. The invention further discloses a carbon counter electrode for a perovskite solar cell. The carbon counter electrode is prepared and acquired by adopting the above-mentioned conductive carbon paste in a screen printing means. The invention further discloses the perovskite solar cell comprising the above-mentioned carbon counter electrode. A method of preparing the conductive carbon paste is further disclosed. The conductive carbon paste which does not make a perovskite film corroded further increases the photoelectric conversion efficiency.

The invention discloses a method for increasing an asphalt softening point. Firstly, asphalt is added into a reaction kettle, the reaction kettle is heated to a temperature of 200 to 280 DEG C, and melting asphalt is confected; then an air blower is used to feed oxidizing agents into the reaction kettle from the bottom of the reaction kettle, and the melting asphalt is oxidized at a high temperature and a high speed; afterwards, the oxidized melting asphalt is added into an atomizing and conditioning tower at a temperature of 380 to 550 DEG C and is rapidly flashed under a high temperature condition; later, the flashed melting asphalt is imported into an emulsifying machine at a temperature of 300 to 400 DEG C, and emulsifying agents are added into the emulsifying machine to emulsify the flashed melting asphalt at a high speed; and finally, after the emulsified melting asphalt is cooled and the temperature is reduced to below 300 DEG C, materials are emptied and the asphalt with a high softening point is acquired. According to the method, through adopting a manner of oxidizing the asphalt melt at a high speed and a high temperature, rapidly flashing the asphalt melt and emulsifying the asphalt melt at a high speed, the asphalt with the high softening point is obtained; and the method has the characteristics of simple preparation process, short time consumption, high product softening point and low comprehensive cost.

The invention relates to a method for preparing preserved polygonatum rhizome, which includes the steps as follows: cutting polygonatum rhizome into sheet shape and placing into brine and then into wine for immersion, steaming at normal pressure, rising with water and drying, placing into medicinal syrup for immersion, steaming at normal pressure, fetching the cooked polygonatum rhizome sheets from the medicinal syrup, drying into the preserved polygonatum rhizome, etc. The polygonatum rhizome is prepared into an instant product like preserved fruit by the method, and the preserved polygonatum rhizome contains licorice and wolfberry, honey and sugar, therefore, the preserved polygonatum rhizome not only has a good mouthfeel, but also has the function for improving spleen, stomach, liver and kidney.

The electric spinning and in-situ photopolymerization apparatus and process for preparing nanometer fiber belongs to the field of electric spinning technology. The electric spinning apparatus includes one common electric spinning apparatus and one ultraviolet or visible light generator set between the spinning nozzle and the accepting screen of the common electric spinning apparatus. The electric spinning process includes the following steps: compounding water solution or organic solvent solution of water soluble polymer and adding polyfunctional monomer and photoinitiator to the solution through homogeneous mixing; electrically spinning the solution while irradiating, with the central light strength being 100-400 mw / sq cm; and soaking nanometer fiber non-woven fabric in acetone, and drying to obtain nanometer fiber non-woven fabric. The nanometer fiber non-woven fabric has high mechanical strength and no toxicity, and may be used widely.

The invention discloses a method for preparing a high-temperature superconducting coating conductor La0.7Sr0.3MnO3 buffering layer film, and belongs to the technical field of high-temperature superconducting materials preparation. The film prepared by the method is smooth and compact, and is favorable in texture, and triplex functions of La0.7Sr0.3MnO3 as a conducting buffering layer film, namely isolation, extension and electric current transmission, can be adequately exerted. The method comprises the following steps: dissolving analytically pure lanthanum oxide (La2O3) in acetic acid (the mol ratio of the acetic acid to cations being 10: 1) in a cation ratio of La: Sr: Mn=0.7: 0.3: 1; after the analytically pure lanthanum oxide is completely dissolved, putting the obtained solution in an infrared drying box, and after the solution is baked into a white solid, taking out the white solid; mixing and dissolving strontium acetate and manganese acetate with the prepared white solid (namely lanthanum acetate) in propionic acid in the cation ratio of La: Sr: Mn=0.7: 0.3: 1 to form an anhydrous solution; adding polyvinyl butyral (PVB) in the anhydrous solution to prepare into a colloid with good film forming property; and coating the colloid on a substrate, drying the coated substrate, and then, putting the dried substrate in a sintering furnace to be sintered to form a phase, so as to obtain a lanthanum-strontium-manganese oxide La0.7Sr0.3MnO3 high-temperature superconducting coating conductor buffering layer. The cost of the method is low; the manufacturing process is simple; the operation is easy to control; and the environment is not polluted.

The invention provides a metal mold casting coating for an aluminum alloy thin-walled piece. The coating is prepared from refractory aggregate, adhesive and carrier liquid, wherein the refractory aggregate contains kieselguhr, corundum powder, titanium dioxide and asbestos powder; the adhesive is silica sol or anhydrous phosphate; the carrier liquid is industrial alcohol; and the coating comprises the following components in part by weight: 0.5 to 1 part of kieselguhr, 0.5 to 1 part of corundum powder, 1.5 to 3.5 parts of titanium dioxide, 3 to 7 parts of asbestos powder, 0.6 to 1 part of silica sol or anhydrous phosphate, and 20 to 60 parts of industrial alcohol. The invention also provides a preparation method for the coating; the method comprises the following steps of: putting the refractory aggregate and the adhesive into a container with proper size, stirring the refractory aggregate and the adhesive uniformly through manpower or a machine, pouring the industrial alcohol into the container, and stirring uniformly for later use. The invention finally relates to a coating method of the coating. When the coating is used, the temperature of a die is between 180 and 400 DEG C, and a coating with the thickness of 0.1 to 0.5 millimeter is coated on the surface of the die.

The invention discloses a medicine coating balloon. The medicine coating balloon comprises a balloon body and a medicine coating covering the surface of the balloon body, wherein the medicine coatingis formed by spraying a medicine spraying solution to the surface of the balloon body; and the medicine spraying solution is obtained by dissolving medicine, a fat-soluble excipient and a hydrophilicexcipient in a solvent. The invention further discloses a preparation method of the medicine coating balloon and a medicine coating balloon dilatation catheter. According to the medicine coating balloon, the firmness of the medicine coating is higher, the granularity of the medicine is small, the medicine loss can be greatly reduced in the medicine balloon crossing and dilatation process, the tissue absorption rate is high, and the medicine utilization rate is increased.

The invention discloses a printing machine for drying ink by circulating air, which comprises a printing machine shell and a machine base, the printing machine shell is fixedly installed on the top of the machine base, and also includes moving wheels, a temperature-controlled circulating air system, a printing press device and an ink supply box, the moving wheel is fixedly installed at the bottom of the machine base, and the moving wheel adopts a high-strength rubber silent roller; the invention has a reasonable and simple structure, and can dry the ink on the printing paper of the printing machine by circulating air to prevent Heat dissipation, energy saving and environmental protection, high printing quality, and the wind that dries the ink circulates in the air cover, so that the flowing air used to dry the ink on the paper is isolated from the ink supply box, which can avoid the accelerated evaporation of the ink in the ink supply box caused by the air flow , the filter can filter the dust and dehumidify the air in the process of circulation, to ensure the cleanliness and dryness of the air that enters the circulation air hood to dry the ink, and the heated air can be recycled to prevent heat loss, which can reduce the ink of the printing machine Drying costs, energy saving and environmental protection.

The invention relates to a processing method of yellow chrysanthemum tea. The processing method comprises the following steps: 1, picking fresh flowers; 2, spreading for placing in a grading manner; 3, cleaning the flowers; 4, primarily drying; 5, secondarily drying; 6, full firing; and 7, stalk-separating and grading. The processing method has the beneficial effects that the yellow chrysanthemum tea in a dry state is gold-yellow in filament and green in receptacle; whole chrysanthemum is suspended in a cup after the yellow chrysanthemum tea is made, and is gold-yellow; the yellow chrysanthemum tea is gold-yellow and bright in soup color, clean and durable in aroma and mellow in taste. According to the processing method, a high-temperature green-removing (flower steaming) process of conventional chrysanthemum tea is changed in a processing technique and a spreading process is adopted, and thus the processing time is prolonged, the transformation of internal ingredients of the chrysanthemum is promoted, a multi-time section drying method is adopted in the drying procedure, the temperature is gradually increased, the dissipation of water and the collation of aroma substances are facilitated; by applying a relatively-high-temperature full firing process, low-melting point aroma substances relatively quickly volatilize, the flower aroma is relatively pure, and the aroma volatilizes relatively remarkably after the yellow chrysanthemum tea is made.

The invention discloses an esomeprazole enteric coated pellet preparation and a preparation method thereof. Particularly, the esomeprazole enteric coated pellet preparation is prepared from the following parts including a hollow pellet core, a drug loading layer, an isolation layer and an enteric coated layer, wherein the drug loading layer is prepared from the following raw materials including esomeprazole trihydrate, an adhesive and a drug loading layer solvent; the isolation layer is prepared from the following raw materials including a polymer material, a lubricant, an acid and alkali regulator and a drug loading layer solvent; the enteric coated layer is prepared from the following raw materials including a film forming agent, a plasticizer, a lubricant, a sunscreen and a drug loading layer solvent. The preparation method of the esomeprazole enteric coated pellet preparation sequentially comprises the following steps: 1) coating the drug loading layer; 2) coating the isolation layer; and 3) coating the enteric coated layer. With the optimization of a formula and a technology, the preparation method is capable of improving the coating efficiency, reducing the coating time and preventing the manpower and material resource waste. The prepared enteric coated pellet preparation is capable of improving the stability of a medicament and the medicine taking compliance of a patient, is more suitable for the patient to use and can be further processed into an oral preparation such as a capsule or a tablet.

The invention discloses an automobile air conditioner cleaning agent and a preparation method thereof. The preparation method comprises the following steps: mixing deionized water, sodium xylene sulfonate, propylene glycol methyl ether and ethylene glycol monobutyl ether to prepare a mixed solution M; grinding peppermint, fructus forsythia, benzoin and borneol, then sieving, then adding into an ethanol solution, heating, stirring uniformly, and performing suction filtration to obtain a filtrate N; and mixing the mixed solution M with the filtrate N to obtain the automobile air conditioner cleaning agent. By using the automobile air conditioner cleaning agent, the problems that the current air conditioner cleaning agent cannot be volatilized easily and can generate a pungent smell after use at the same time are solved.

The invention provides a temperature-variable controlled-release gel composite material and application thereof in a cigarette filter stick, and belongs to the technical field of preparation of cigarette holders. A preparation method comprises the steps that gel is heated and melted; then the gel is conveyed into an infiltration tank with a heat preservation function; a common aroma-increasing core wire is wound through an unwinding mechanism and then guided to the infiltration tank, the core wire is immersed into the liquid gel, and the concentration of the liquid gel is adjusted so that the thickness of a gel layer attached to the surface of the aroma-increasing core wire can be larger than or equal to the diameter of the aroma-increasing core wire; then cooling and drying are conducted on the infiltrated aroma-increasing core wire, the gel is solidified into a solid which is attached to the surface of the aroma-increasing core wire, and accordingly the temperature-variable controlled-release gel composite material is obtained. According to the composite material prepared from the gel and the prepared filter stick, the forming degree and the aroma locking effect are good, production arrangement of the filter stick is facilitated, obtained products are relatively rich, and quick volatilization of the gel which is simply applied to the filter stick during smoking can be slowed down, so that a whole cigarette has a relatively balanced mouth feel.

The invention relates to a method for preparing a gelatin / polycaprolactone composite nanometer fiber membrane through electrostatic spinning, comprising the steps of: (1) mixing gelatin with polycaprolactone, adding the mixture into trifluoroethanol or hexafluoroisopropanol, stirring, adding acetic acid and stirring till the solution is transparent so as to obtain a gelatin / polycaprolactone spinning solution; and (2) extracting the gelatin / polycaprolactone spinning solution, fixing on an electrostatic spinning device to carry out electrospinning, collecting fiber membranes, and drying in vacuum to obtain the gelatin / polycaprolactone composite nanometer fiber membrane. The method provided by the invention has the advantages of quickness, simpleness, convenience, low cost and good spinnability; the prepared composite nanometer fibers have smaller diameter and very good mechanical property and are suitable for batch preparation and mass production of the gelatin / polycaprolactone composite nanometer fiber membrane.

The invention provides a nanofiber membrane and a preparation method and application thereof. The nanofiber membrane is formed by fibers of a core-shell structure and is characterized in that the core is formed by mixed fibers mixed by polylactic acid-hydroxyacetic acid and polycaprolactone, the shell is formed by fibers formed by gelatin crosslinking with genipin, and the core is loaded with chemical therapy medicine. The nanofiber membrane prepared by the coaxial electrospinning technology has an in-situ anti-cancer function and is implantable, good in biocompatibility, free of cytotoxicity to normal cells and good in curative effect on tumor. The preparation method is simple, mild in condition, low in cost and easy to popularize and apply.

The invention discloses a bitter buckwheat tea processing technology comprising the following steps of: handpicking bitter buckwheat with chaffs, immersing the bitter buckwheat in clean water for 5-8 h, and airing at room temperature for 3-4 h; steaming the bitter buckwheat by using a microwave machine with the power of 10-12 kw for 0.5-2 h, and cooling to room temperature; gradually adjusting temperature from high to low by using a frying device, and stirring at uniform speed and frying drily to quickly volatilize water in the bitter buckwheat; and heating quickly by using a dryer, and packing. The bitter buckwheat tea processing technology disclosed by the invention is simple, and the processed bitter buckwheat tea has rich nutrition.

The invention discloses a quartz stone anti-fouling agent and a preparation method and application thereof. The quartz stone anti-fouling agent comprises the following raw materials in percentage by mass: 6-16% of methyl hydrosilicone oil, 2-8% of hydroxyl-terminated polydimethylsiloxane, 0-5% of methyl silicone oil, 1-2% of cosolvent, 0.5-5% of silane coupling agent and 70-85% of solvent. The quartz stone anti-fouling agent is specially developed for coarse and porous quartz stone which is vulnerable to fouling; and by simply smearing the anti-fouling agent on the surface of the quartz stone, the quartz stone can be effectively protected from oil pens, ink, coffee, tea and other pollutants. The quartz stone anti-fouling agent disclosed by the invention is simple in preparation process, good in anti-fouling property and favorable in scrub resistance and durability, can not influence the surface gloss of the quartz stone, and is non-toxic and non-corrosive, thus not only being applicable to the quartz stone, but also being applicable to agglomerated stone, marble, matt tiles and the like.

A manufacturing method of a potato chip includes the following steps of material selection, cleaning at the first time, peeling, cleaning at the second time, slicing, cleaning at the third time, blanching, drying and separation, liquor pouring, frying, mixing, inspection and metering and packing and warehousing. According to the manufacturing method, pulps on a plurality of sections of a fresh potato are eliminated through light salt brine washing, impurities are prevented from being mixed in the frying process, and generation of poisonous substances such as nalkane, monoolefine, phenois and keto is prevented. Liquor pouring is carried out due to the fact that ethyl alcohol in alcohol enables cell primary pulps left on the potato after cleaning to fall off and rapidly deposit and enables moisture to quickly volatilize and peculiar smell to be eliminated. Due to the fact that powder removing is carried out two times, powder in oil is little, and the fried potato chip is pure in taste; resources are saved due to the fact that 5% of salt water facilitates dissociation of the pulps, if clean water is used, 4-5 times more clean water will be used, and accordingly the resources are greatly saved.

The invention belongs to the technical field of manufacturing of a liquid-state forming composite material, and relates to a preparation method of a fiber fabric with shaping and toughening double functions. When the double-function fabric is prepared, a thermoplastic resin toughening agent and a benzoxazine resin auxiliary adhesive are attached to one surface by using an atomizing spraying process, and a benzoxazine resin prepolymer powder shaping agent is attached to the other surface in a mechanical spreading mode. The process is simple and easy to implement; and the toughening agent, the auxiliary adhesive and the shaping agent are uniformly distributed on the surfaces of the fiber fabric without entering the interior of tows, so that the fiber fabric keeps good wettability to a resin matrix.

The invention discloses a gradient structure polymer nano-composite material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing composite non-woven fabric with a gradient structure by using a modified electrostatic spinning method, wherein the composite non-woven fabric comprises polymer composite nano fibers and / or polymer nano fibers, the polymer composite nano fibers are capable of using a polymer as a main body fiber skeleton, and enabling nano filler to be dispersed in the main body fiber skeleton; and (2) successively performing hot-pressing and heat treatment on the composite non-woven fabric, to obtain the gradient structure polymer nano-composite material. The method is capable of realizing preparation of the gradient structure composite material, and continuous gradient change of the nano filler in the composite material, wherein a gradient direction is adjustable, and the gradient composite material has an excellent dielectric property and extremely high performance stability.