37 results about "Phase separation process" patented technology

The invention relates to the technical field of adsorbent preparation, and discloses a preparation method of an efficient separation adsorbent for indium and germanium in a zinc solution, which comprises the following steps: in a porous inorganic mineral substrate, dipping a mixed solution containing an organic functional agent, a monomer, a cross-linking agent, a pore-foaming agent and an organic solvent under ultrasonic treatment; the in-situ polymerization reaction and the polymerization-induced phase separation process are carried out concurrently through cooperative regulation and control of multiple chemical and physical processes, physical embedding of the functional agent on the mineral substrate is achieved to solve the loss problem, and meanwhile the in-situ polymerization reaction and the polymerization-induced phase separation process are carried out at the same time. And an internal microporous structure of a polymer network is synchronously constructed, and the chemical activity of the functional agent is guaranteed, so that the adsorbent has high stability and high-speed mass transfer kinetics.

This invention provides a high-performance, high-precision gradient pore ultrafiltration membrane and its preparation method, belonging to the field of membrane preparation technology. Lithium chloride can alter the thermodynamic properties of the casting solution, affecting the aggregation state of polymer molecules and the phase separation process. CTAB has multiple functions in the phase inversion membrane preparation process; as a non-solvent additive, it regulates the phase separation behavior of the polymer PVDF, promoting the formation of more uniform nanoscale channels. DOP has a unique molecular structure and physicochemical properties, playing a multifaceted role in improving membrane performance; by inserting itself between PVDF molecular chains, it weakens the intermolecular forces, making the molecular chains more loosely arranged, thereby forming more interconnected channels and increasing flux. Simultaneously, it helps to form a narrow pore size distribution, reducing macropore defects and improving retention accuracy. This invention, through the mixing of the above substances, effectively achieves a high-porosity, nanoscale pore structure, realizing a high-performance, high-precision gradient pore ultrafiltration membrane preparation method.

The invention belongs to the technical field of membrane materials, and particularly relates to a preparation method of a dumbbell-shaped polyethersulfone virus-removing membrane, which comprises the following steps: S1, mixing a membrane-forming polymer, an amphiphilic polymer, a non-solvent pore-foaming agent and an organic solvent, stirring, dissolving and defoaming to obtain a uniform and stable membrane casting solution; s2, blade-coating the membrane casting liquid on a support body to form a liquid membrane; s3, exposing the liquid film in humidity-controllable air for a period of time, and carrying out a steam-induced phase separation process; s4, immersing the cast film obtained in the step S3 into a coagulating bath to complete phase inversion so as to form a solid-state film; s5, the formed solid membrane is sequentially subjected to water washing, hole preserving treatment and drying, and the dumbbell-shaped polyethersulfone virus-removing membrane is obtained. The compact layer in the dumbbell-shaped structure ensures the high virus rejection rate, and the porous structure with the open interior reduces the transmission resistance of water to the minimum, so that the unification of the high virus rejection rate and the high water flux is realized, and the protein transmittance is ensured to be more than 98%.

The application discloses a hydrogel with a directional conical porous structure and a preparation method thereof, and belongs to the technical field of atmospheric water collection.The directional conical porous structure hydrogel with atmospheric water collection capacity is prepared by first preparing a uniform sodium alginate solution and an acid solution respectively, then pouring the sodium alginate solution into a mold, adding the acid solution, and finally obtaining the hydrogel with the directional conical porous structure through an acid-induced phase separation process.Compared with traditional hydrogels, the hydrogel obtained by the application not only has a rapid moisture absorption-desorption efficiency, but also has excellent cycle stability.In a plurality of moisture absorption-desorption cycles, the hydrogel can maintain a high moisture absorption amount, reduce moisture absorption salt loss, and prolong the service life of the material; and the preparation process of the application is simple, the cost is low, the environmental friendliness is high, and industrial production can be realized.

The application discloses a preparation method of a PVDF-polydopamine blended ultrafiltration membrane based on NaClO induction, and comprises the following steps: (1) dissolving PVDF, polyvinylpyrrolidone and dopamine in an organic solvent, and gradually stirring and heating to form a homogeneous casting solution; (2) uniformly coating the homogeneous casting solution on the surface of a glass plate by using a scraper, and then standing at room temperature; and (3) immersing and standing the coated glass plate in a constant-temperature NaClO solution, and forming a film by phase separation oxidation to obtain the blended ultrafiltration membrane. According to the preparation method, the dopamine monomer is directly added in the casting solution, NaClO is only introduced in the gel bath in the membrane forming stage of the traditional phase separation method, and a redox reaction is induced on the membrane interface in the phase separation process, so that a homogeneous polydopamine coating layer can be formed on the membrane surface in the phase separation process; the operation method is simple, the polydopamine formation period is short, the applicability is strong, and the stability, hydrophilicity and permeability of the membrane are good.

This invention belongs to the field of flexible strain sensor technology, and particularly relates to the preparation of a carbon nanotube coil flexible strain sensor based on the evaporation-induced phase separation method guided by Hansen's solubility parameter theory. The method involves screening the solvent-solute system based on Hansen's solubility parameter theory, first modifying the carbon nanotube coil with Fe-Sn bimetallic catalytic growth and acidification functionalization, then preparing a carbon nanotube coil / thermoplastic polyurethane composite porous membrane via a one-step evaporation-induced phase separation method, and finally encapsulating the membrane with electrodes to obtain the finished flexible strain sensor. The method includes three steps: formulation screening based on HSP theory, growth and functionalization modification of CNCs, and one-step sensor preparation. By controlling the precipitation behavior of the polymer phase and conductive filler phase during the evaporation-induced phase separation process, thermoplastic polyurethane is first precipitated to form a porous framework, and then CNCs are directionally enriched and deposited on the pore wall surface, thereby constructing a highly exposed three-dimensional conductive network and obtaining a monolithic integrated flexible strain sensor.

The invention discloses an anti-calcification heart valve prosthesis and preparation thereof, and particularly relates to the field of heart valve prosthesis application. The preparation method comprises the following steps: soaking a bacterial nano cellulose membrane (BNC membrane) in a polyvinyl alcohol (PVA) solution, and then carrying out freezing phase separation after-treatment, thereby obtaining the bacterial nano cellulose membrane. The preparation method comprises the following steps: preparing a film-shaped BNC material; soaking the BNC membrane with the moisture removed in a polyvinyl alcohol solution; performing phase separation treatment on the BNC membrane containing the polyvinyl alcohol solution; removing residual impurities on the surface of the composite membrane; suturing the artificial heart valve prosthesis; according to the preparation method, the thickness of the BNC membrane can be reduced, so that the thickness of the composite membrane is reduced, the mechanical property, anticoagulation and anti-calcification properties of the composite membrane are improved, and the preparation method has great application potential in the field of artificial heart valves.

The present application relates to a composite diaphragm, and a preparation method therefor and the use thereof. The composite diaphragm comprises a three-dimensional porous support layer and a membrane material, wherein pores of the three-dimensional porous support layer are filled with the membrane material; the three-dimensional porous support layer comprises fiber filaments and / or a fiber cloth, and the fiber filaments and / or fiber filaments constituting the fiber cloth are hydrophilic fiber filaments and / or roughened fiber filaments. The composite diaphragm forms an elastic collapse-resistant support framework by means of multi-layer stacking, interweaving and winding of the fiber filaments, which improves the compression strength of the diaphragm; the treated fiber filaments can increase their contact with a casting solution, and the casting solution and the fiber network are interactively filled, which increases the contact volume between a liquid membrane and a phase separation non-solvent and delays the phase separation process during solidification so as to form a uniform sponge microporous dense structure, such that the formation of large finger-shaped through holes is inhibited, thereby facilitating the blocking of gas passage and improvement to the chemical stability. The casting solution is uniformly distributed in the fiber framework, and the membrane material is firmly anchored by the three-dimensional fiber network after solidification, such that the mechanical stability of the diaphragm is improved.

The invention provides brown milk skin layered yoghurt and a preparation method thereof, and relates to the technical field of yoghurt, the brown milk skin layered yoghurt comprises 80-90 parts of raw milk, 1-10 parts of cream, 0.6-1.2 parts of a compound stabilizer, 4-10 parts of sugar, and 0.01-0.05 part of a strain, the brown milk skin layered yoghurt is finally prepared through the processes of primary burdening of raw milk and sugar, high-temperature cooking, secondary burdening of residual raw materials, high-speed shearing, homogenization, sterilization, rapid cooling, inoculation, re-heating, fermentation, refrigeration and after-ripening. In the preparation process, Maillard reaction is promoted through high-temperature cooking, and controllable browning is realized; cream is fully emulsified through high-speed shearing, emulsified particles are dispersed through low-pressure homogenization, and the cream particles can be gathered and solidified at a proper speed in the fermentation process; and the subsequent rapid cooling and re-heating steps after pasteurization effectively control the protein solidification and phase separation process, finally form a layered structure with stable layers and fine texture, and improve the appetite and interestingness at the same time.

The invention belongs to the technical field of waste liquid resourceful treatment, and particularly relates to a phase separation and recovery device for polyacrylonitrile spinning dimethyl sulfoxide-containing waste water. Comprising a transpiration multi-section type combined pipeline which comprises a continuous S-shaped flow channel formed by alternately connecting vertical sections and horizontal sections; a heat supply system; and each condensation recovery device is connected with the corresponding horizontal section. By adopting the S-shaped transpiration multi-section combined pipeline, transpiration, separation and condensation are integrated, the space utilization rate is high, and the process is continuous. A pneumatic device is arranged in the pipeline, so that gas flow conveying in a specific direction is realized, and the conveying flow of a gas-fog mixture can be adjusted; through the multi-stage gradient heating combination including external heating and inert gas mixing heating, the heating efficiency is high, and the phase separation process can be more accurately controlled; the design of a condensation recovery device is matched, so that the separation efficiency of DMSO and water and the product purity are effectively improved.

The invention discloses a preparation method of a viscosity-controllable high-strength and high-toughness bio-based reactive polyurethane coating which is firstly subjected to chain extension and then crosslinked. According to the method, directional regulation and control of chain growth and cross-linking reaction are realized by regulating and controlling the molecular weight and viscosity of the prepolymer. According to the bio-based reactive polyurethane coating, diisocyanate, a cross-linking agent and bio-based polyols with different molecular weights are used as raw materials to synthesize different prepolymers with free-NCO content, viscosity and molecular weight, and the prepolymers are mixed with polyols and then cured in situ to form a film under the medium-free condition. According to the regulation and control method, the reaction process of bio-based reactive polyurethane film forming is regulated through the molecular weight and viscosity of a prepolymer, and the feasibility of the regulation and control method is verified through the time-temperature equivalence principle. The result shows that the controllable adjustment of the chain extension-gel-phase separation process of the medium-free system polyurethane is realized, and the controllable adjustment of the reactive polyurethane coating in the processing process is realized.

The invention relates to the technical field of carbon dioxide trapping, in particular to a phase change absorbent for trapping carbon dioxide in waste gas and a using method thereof, and the phase change absorbent is obtained by mixing a primary and secondary amine absorbent, a tertiary amine absorbent, a phase splitting accelerant and water. According to the phase-change absorbent for capturing carbon dioxide in waste gas, the phase-separation accelerant is compounded, so that the phase-change phenomenon in the phase-separation process is more stable, the service life of the phase-change absorbent for capturing carbon dioxide in waste gas is prolonged, and meanwhile, the phase-change absorbent is high in capturing rate, large in absorption capacity and good in absorption effect; the invention further provides a using method of the phase change absorbent for capturing carbon dioxide in waste gas, the carbon material desorption accelerant is added in the desorption process, the desorption amount and the desorption rate can be remarkably increased, desorption of CO2 can be more rapidly promoted, and therefore the desorption time is greatly shortened, the treatment efficiency is improved, and regeneration energy consumption is reduced.

The application discloses a three-phase separation device and equipment for sewage anaerobic treatment, which is used for a UASB reactor, and comprises multiple layers of gas collection hoods arranged in the up-down direction, and spacing adjusting devices for controlling the layer spacing of the gas collection hoods, wherein the spacing adjusting devices comprise sensing devices for sensing the sewage condition in the UASB reactor, and the spacing adjusting devices feed back control the layer spacing of the gas collection hoods according to the sensing information of the sensing devices. By arranging the multiple layers of gas collection hoods with the dynamically adjustable layer spacing, the stability and adaptability of the three-phase separation process of the UASB reactor can be improved. The sensing devices are used for sensing the sewage flow speed and working condition changes in the reactor in real time, and the centrifugal lifting mechanism and the rack-gear linkage driving are used for synchronously adjusting the spacing between the layers of gas collection hoods, so that the backflow gap width can automatically match the change of the ascending water flow speed.

This application relates to a separator for alkaline batteries, its preparation method, and its application, belonging to the field of electrochemical device technology. It includes a porous base membrane and a gel precursor layer coated on at least one surface of the porous base membrane. By introducing a phase separation initiator that can be triggered by a specific concentration of alkaline electrolyte, the gel precursor layer coated on the base membrane undergoes in-situ phase separation only after battery electrolyte injection. This integrates the most complex porous structure forming step into the battery assembly process, simplifying the separator's manufacturing process. More importantly, this in-situ phase separation process allows the polymer matrix to form a gel functional layer with a three-dimensional interconnected pore structure at the electrode interface under liquid-phase mass transfer and thermodynamic drive. This achieves molecular-level interpenetration and conformal fusion with the electrolyte and electrode surface microstructure, reducing solid-solid interface contact impedance and constructing continuous, uniform, and efficient ion transport channels, thereby improving the battery's discharge capacity and overall electrochemical performance.

Disclosed herein is a method for recording a grating structure and the resultant grating structure. In one example, the method includes: depositing a holographic mixture containing a mixture of monomer and inert material onto a first substrate; exposing the holographic mixture to form a nanostructure including polymer-rich and inert-material rich regions using a holographic exposure phase separation process; removing the inert material from the inert material rich regions to form a grating including polymer rich regions and regions containing a residual polymer network; applying an ashing process to the regions containing a residual polymer network to form an ashed grating comprising polymer-rich regions and air regions; depositing a coating material onto the ashed grating to form a coated grating where the coating material backfills the air regions and overcoats the polymer-rich regions.

This invention discloses a multi-stage oil-water separation device and method based on porous media. The device comprises a cover plate, separation chips, a flow guide plate, and porous media installed between the separation chips. This method utilizes the hydrophilicity / hydrophobicity and dimensional structure of the porous media to achieve selective separation of oil and water components. The design of the flow guide channels on the flow guide plate enables multi-stage connection of the oil-water separation device, increasing the separation load and allowing for scale-up of the device, achieving highly efficient oil-water separation. During continuous separation, the oil and water phases can be rapidly and efficiently separated within the device, achieving 100% separation selectivity even at high feed rates. The separation process is more easily controlled, effectively improving the separation efficiency of the oil-water system. This invention enables enhanced oil-water two-phase separation processes and equipment miniaturization in the field of chemical separation technology, significantly improving the system's separation efficiency.

A method for preparing a bowl-shaped microgel belongs to the field of microgel technology. The specific steps of the preparation method are as follows: 1. Solution preparation: Weigh cetyl polyethylene glycol / polypropylene glycol-10 / 1 dimethylsiloxane (EM 90) and hexadecane to prepare a hexadecane solution containing EM 90; weigh PEGDA, LAP, and polysaccharides to prepare an aqueous solution containing PEGDA, LAP, and polysaccharides; 2. Microdroplet preparation; 3. Microgel preparation; 4. Microgel washing. The oil and surfactant used in this invention are inexpensive and readily available, and the preparation method is simple, avoiding the changes in the microgel matrix caused by the osmotic pressure of the aqueous two-phase phase during the phase separation process in microgels based on the phase separation principle. By incorporating polysaccharides to adjust the composition and structure of the microgel prepolymer solution, bowl-shaped microgels with different matrices can be obtained. The microgels prepared by this invention are expected to be used for disease diagnosis and treatment.

The invention discloses a preparation method and application of a bio-based furan polyurethane honeycomb porous material. The bio-based furan polyurethane honeycomb porous material disclosed by the invention is prepared from bio-based polyether polyol / furan modified polyester polyol, dihydroxyl-terminated polysiloxane, diphenylmethane diisocyanate and a functional additive through step-by-step polymerization and wet-process solvent replacement. According to the invention, by introducing bio-based sourced compounds including furan modified polyester polyol, furan-2, 5-diformylhydrazine and poly trimethylene ether glycol, dihydroxyl-terminated polysiloxane is utilized to enhance an environmental barrier, and polyvinyl alcohol and polyamide wax are combined to regulate and control a phase separation process, so that the phase separation efficiency is improved; and finally, the bio-based furan polyurethane honeycomb porous material with a bionic honeycomb porous structure, extremely soft skin-friendly touch feeling and excellent rebound resilience is developed.

The invention discloses a composite enhanced organic tubular membrane and a preparation method thereof, and belongs to the technical field of membrane separation. Comprising a tubular non-woven fabric supporting layer, a grid fiber skeleton layer arranged on the inner side of the tubular non-woven fabric supporting layer and a polymer membrane separation layer. Wherein the grid fiber skeleton layer and the non-woven fabric supporting layer are fixed into an integrated tubular skeleton through welding; the polymer membrane separation layer is formed by membrane casting liquid through a phase inversion method, completely coats the grid fiber skeleton layer, is in contact with the inner surface of the non-woven fabric supporting layer, and does not permeate into the non-woven fabric supporting layer. According to the invention, the grid fiber skeleton is introduced into the separation layer as a reinforcing structure and is firmly combined with the supporting layer in a welding manner, so that the mechanical strength and anti-stripping performance of the membrane separation layer are greatly improved; meanwhile, the interference of the membrane casting liquid permeating the supporting layer on the phase separation process is avoided, the forming quality and the performance stability of the membrane are ensured, and the problems that a traditional tubular membrane is easy to scratch and delaminate are solved.

This invention discloses a poly(4-methyl-1-pentene) aerogel, its preparation method, and its applications. By using camphene as a solvent for poly(4-methyl-1-pentene), a thermally induced phase separation process is initiated by controlling the cooling rate, followed by conventional drying to obtain a white aerogel with good self-supporting properties. The preparation method is simple and mild, requiring no complex processes or expensive equipment, and can be produced on a large scale. The aerogel possesses a rich microporous structure and extremely high solar reflectivity, making it suitable for radiative cooling for passive cooling. Furthermore, the aerogel prepared by this method exhibits excellent superhydrophobicity and thermal insulation properties, enhancing its potential for outdoor applications.

The invention discloses a stone-like paint for a building outer wall and a preparation method thereof, and the core is that a micron-to-nano gradient pore network is constructed through a template method and a phase separation process, a multi-layer composite optical material is compounded, and a dynamic optical simulation effect is realized. By means of the synergistic effect of a pore structure and an optical material, the coating shows color depth and gloss level changes of natural stone under different visual angles, and micropores can be finely adjusted along with temperature and humidity to adapt to the environment, so that long-term stability is guaranteed. The stone-like paint is low in content of volatile organic compounds, high in weather resistance and not prone to fading, the simulation degree of the stone-like paint is far higher than that of traditional products, and the stone-like paint is suitable for high-end villas, historical building repair and commercial landmark scenes and has environmental protection performance and practical value.

The present application relates to a kind of low shrinkage PMP hollow fiber membrane and its manufacturing process.The manufacturing process of the present application includes mixed casting solution, extrusion, solidification cooling, heat stretching, washing extraction, preliminary drying and heat setting, the nascent PMP hollow fiber membrane after solidification cooling is heat stretched at a certain temperature in the present application, the crystal orientation degree of PMP hollow fiber membrane is made to reach higher value by adjusting the stretching ratio of heat stretching, so that the breaking elongation of PMP membrane is low, the aging shrinkage and dimensional stability of PMP membrane are improved, and finally the problem of easy to be stretched and unstable size in the storage and weaving process of the membrane filament made in the previous thermally induced phase separation process is solved.The manufacturing process of the present application is simple, good stability, good repeatability, easy to operate, and has strong practicability.

The application belongs to the field of filtration membranes, and relates to a preparation method of a persistent hydrophilic ultrafiltration membrane. Firstly, functional hydrophilic molecules are simultaneously synthesized in a conventional dissolving process of a polymer membrane material; then, after the polymer solution (nascent membrane) enters a coagulation bath, a cross-linking reaction between the functional hydrophilic molecules is initiated by the coagulation bath to form a hydrophilic cross-linking network. By in-situ forming a hydrophilic cross-linking interpenetrating network in the polymer phase separation process, the movement of polymer chains and the formation and growth of micelles are limited, a relatively uniform polymer interpenetrating network structure is formed, and a persistent hydrophilic ultrafiltration membrane with a relatively uniform membrane pore structure is obtained. The method has mild reaction conditions, a simple preparation method, and universality.

The application discloses a hydrogel with a directional conical porous structure and a preparation method thereof, and belongs to the technical field of atmospheric water collection.The directional conical porous structure hydrogel with atmospheric water collection capacity is prepared by first preparing a uniform sodium alginate solution and an acid solution respectively, then pouring the sodium alginate solution into a mold, adding the acid solution, and finally obtaining the hydrogel with the directional conical porous structure through an acid-induced phase separation process.Compared with traditional hydrogels, the hydrogel obtained by the application not only has a rapid moisture absorption-desorption efficiency, but also has excellent cycle stability.In a plurality of moisture absorption-desorption cycles, the hydrogel can maintain a high moisture absorption amount, reduce moisture absorption salt loss, and prolong the service life of the material; and the preparation process of the application is simple, the cost is low, the environmental friendliness is high, and industrial production can be realized.

The application discloses a vanadium carbide nano material capable of enhancing photothermal therapy and application thereof, and relates to the technical field of biomedical materials. The vanadium carbide nano material comprises vanadium carbide nanosheets and cell membrane vesicles. The vanadium carbide nano material is coated with V2C nanosheets through engineering of tumor cell membrane vesicles, target delivery is realized, and the photothermal therapy effect is significantly enhanced by utilizing the characteristic of vanadium elements to block the HSF1 phase separation process. The vanadium carbide nano material integrates multiple functions such as target delivery, photothermal conversion, oxidative stress induction and HSF1 phase separation inhibition, and effectively overcomes the heat tolerance of tumor cells.

The application provides a hollow ultrafiltration membrane, a preparation method and application thereof, and the preparation method provided by the application adopts a non-water-soluble ether compound as an opening agent, in a non-solvent induced phase separation (NIPS) process, the casting solution is extruded and then enters a coagulation bath to perform phase separation, the ether compound cannot transfer with water and migrates and stays on the membrane surface and inside, the ether compound is dissolved out through post-treatment, and a hollow fiber ultrafiltration membrane with a composite structure of a sponge body structure in the inside and nano-level openings on the inner and outer surfaces is prepared. In an actual filtration process, the nano-level opening channels on the membrane surface and the sponge body structure in the inside are used to intercept pollutants for multiple times, and the use requirements of high pure water flux and high interception efficiency are met. The obtained hollow ultrafiltration membrane has a rejection rate of not less than 99% for 50nm silicon dioxide particles, and a pure water flux of not less than 600 L / (m2*h*bar) (25 DEG C). The hollow ultrafiltration membrane can provide efficient and stable terminal filtration guarantee for an ultrapure water system.

The invention discloses mineral water plastic and a preparation method thereof.The preparation method comprises the following preparation steps that S1, natural minerals and nano cellulose are dispersed in water, and first dispersion liquid is prepared; s2, adding an acrylamide monomer, an initiator and a cross-linking agent into the first dispersion liquid, and reacting under a heating condition to prepare composite hydrogel; and S3, the composite hydrogel is soaked in a first solvent, the non-solvent induced phase separation process is triggered, then the material is subjected to densification treatment, and the mineral water plastic is prepared. The mineral water plastic prepared by the invention realizes high mineral loading and excellent processing and mechanical properties, and also endows the material with high hardness, wear resistance, heat resistance and excellent flame retardance.

The invention discloses a wave-absorbing fiber with a porous structure as well as a preparation method and application of the wave-absorbing fiber. The wave-absorbing fiber with the porous structure comprises a carbon nano tube and an aramid nano fiber, the wave-absorbing fiber with the porous structure has a porous structure, and the pore size of pores in the wave-absorbing fiber is gradually reduced from a surface layer to a core layer in the radial direction. The preparation method comprises the following steps: mixing a carbon nanotube dispersion liquid, an aramid nanofiber solution and a polyvinyl alcohol solution to form a homogeneous spinning solution; and extruding the homogeneous spinning solution through a spinning nozzle by adopting a wet spinning technology, enabling the homogeneous spinning solution to enter a coagulating bath, carrying out a differentiated phase separation process on the obtained fiber along the radial direction to form a porous structure of which the aperture is gradually reduced from the surface layer to the core layer along the radial direction, and drying to obtain the wave-absorbing fiber with the porous structure. According to the invention, the dielectric constant is regulated and controlled by introducing the aramid nanofiber as a nano element material, and the impedance matching characteristic of the fiber is improved by constructing a radial porous structure of the fiber, so that the electromagnetic wave absorption performance of the material is improved, and ultra-wideband electromagnetic microwave absorption is realized.

The invention discloses an organic solar cell based on a thiophene non-halogen mixed solvent and a preparation method thereof, and belongs to the technical field of organic solar cells. According to the method, two non-halogenated solvents, namely toluene and thiophene, are co-dissolved and mixed to prepare a blended solution of a polymer donor PM6 and a non-fullerene receptor BTP-eC9, so that the collaborative regulation and control of film forming dynamics and a microstructure of an active layer are realized. In the mixed system, through ordered aggregation of the mixed solvent of toluene and thiophene on the organic polymer donor and the non-fullerene small molecule acceptor in the solution and in the film forming process, proper pre-aggregation of polymer molecular chains is induced, the phase separation process is guided, the nanoscale morphology structure is effectively adjusted, and the carrier transport and separation efficiency is improved. The non-halogen mixed solvent strategy enables the efficiency of the device to be improved from 19.1% to 20.1%, which is obviously superior to that of a device prepared by an existing single solvent system, and a new path with popularization value is provided for non-halogenated solvent processing of NF-OSCs.

The invention relates to the field of preparation of gas separation membranes, in particular to a preparation method of a hollow fiber membrane for an aircraft fuel tank inerting system. By optimizing the preparation method and process conditions in the spinning process of the dry-wet phase separation process, the hollow fiber membrane generates a compact skin layer with proper thickness and a support layer structure with proper density, so that the improvement and balance of multiple parameters such as gas permeability, gas selectivity, physical and mechanical properties, packaging strength and the like of the membrane silk are realized; the invention provides the preparation method of the hollow fiber membrane which can be used for an actual aircraft fuel tank inerting system.