90 results about "Superhydrophilicity" patented technology

The invention discloses sulfo group modified silicon-based hybridized super-hydrophilic anti-fog resin as well as a preparation method and application of the sulfo group modified silicon-based hybridized super-hydrophilic anti-fog resin. The silicon-based hybrid super-hydrophilic anti-fog resin is based on polysiloxane modified acrylic resin, a functional monomer containing a sulfonic acid group is introduced, the dosage is controlled, a spraying process is combined, a prepared coating has excellent anti-fog performance, high transparency and mechanical stability, the water contact angle of an obtained coating film is 5-6 degrees, the hardness is 2-3H, the adhesive force is 0 grade, and the anti-fog performance is good. The acid and alkali resistance test lasts for more than 30 hours, and super hydrophilicity is realized. The coating shows excellent antifogging performance under the steam environment of 80 DEG C and the freezing environment of-15 DEG C, and is suitable for antifogging treatment of substrates such as optical devices and automobile glass.

The invention provides a preparation method of a Joule heat-assisted super-wetting metal net, a metal net with super-hydrophilic performance and a metal net with super-hydrophobic performance. According to the material, carbon nanotubes are firmly adhered to the surface of a metal net through polydopamine mediation to construct a micro-nano coarse structure, a hydrophobic alkyl compound is grafted through a sulfenyl three-component coupling reaction to reduce surface energy, and a super-hydrophilic / underwater super-oleophobic metal net and a super-hydrophobic metal net are prepared respectively. The Joule heating effect of the material is remarkably enhanced by introducing the carbon nanotubes, so that the temperature of the material can be rapidly increased to 100 DEG C or above within 20 seconds under the ultralow voltage of 2.0 V. The characteristic can be effectively used for in-situ heating viscosity reduction of high-viscosity crude oil, continuous and efficient oil-water separation is achieved in a double-channel separation device, the crude oil flux reaches up to about 3985 L.m <-2 >. H <-1 >, and the separation efficiency exceeds 98.6%. The method is also suitable for stainless steel meshes with micron-sized apertures, and can realize efficient separation of various crude oil emulsions.

The invention discloses a near-infrared two-region photosensitive molecule, a preparation method of the near-infrared two-region photosensitive molecule and application of the near-infrared two-region photosensitive molecule in preparation of suture lines, belongs to the technical field of medical materials, and synthesizes an aggregation-induced emission organic photosensitizer molecule T-TBT-P for near-infrared two-region emission. The AIE nano aggregate carrying positive charges is formed by self-assembly of hydrophilic and hydrophobic groups of the molecule in water; preparing a polydopamine nano coating on the surface of the suture line by using a dopamine oxidation auto-polymerization method, so that the surface of the suture line carries negative charges and has super-hydrophilicity; finally, the T-TBT-P nano aggregate is loaded on the surface of the suture line through the electrostatic adsorption effect, finally, the diagnosis and treatment integrated suture line is prepared, and the diagnosis and treatment integrated suture line has good antibacterial, subcutaneous tracing and tissue adhesion resisting performance and has good application prospects.

A preparation method of a Cu-HHTP-PPy / stainless steel mesh oil-water separation membrane comprises the following steps: depositing polypyrrole on the surface of a stainless steel mesh to obtain a PPy / stainless steel mesh; pPy / stainless steel is subjected to plasma activating treatment and then placed in a copper acetate solution to be soaked, then the PPy / stainless steel is placed in HHTP, and the Cu-HHTP-PPy / stainless steel mesh separation membrane is obtained through electrochemical auxiliary soaking treatment. The Cu-HHTP-PPy / stainless steel mesh oil-water separation membrane prepared by the invention has super-hydrophilicity-underwater super-oleophobicity, also has electrothermal-photothermal properties, has an underwater oleophobic contact angle of 155 degrees, has efficient oil-water separation performance for different oils, has oil-water separation efficiency of 99% or more, also has relatively high permeation flux and excellent cycle stability, and can be applied to the field of oil-water separation. After circulation for more than 30 times, the oil-water separation efficiency still reaches more than 99%, and the permeation flux stably fluctuates in a relatively small range.

The invention relates to the technical field of membrane material preparation, and particularly discloses an oil-water separation membrane and a preparation method thereof.The oil-water separation membrane is characterized in that polyethyleneimine is grafted to zeolite powder under the action of a cross-linking agent epichlorohydrin, and a large number of amido groups on a polyethyleneimine chain can serve as effective chelating coordination sites of metal ions in subsequent steps; meanwhile, polyethyleneimine has excellent hydrophilic performance and is grafted on the zeolite powder, so that the hydrophilic performance of the zeolite powder is improved; then, three metal salts of magnesium, aluminum and cerium are compounded with urea on the surface of the PEI grafted zeolite through a hydrothermal reaction to generate a composite metal hydroxide structure, Mg and Al form a basic framework of a layered double-metal hydroxide structure, oxygen vacancy defects can be easily formed by doping Ce, and the defects can adsorb water molecules, so that a stable hydration layer is formed on the surface of the material, and the surface of the material is protected; the excellent super-hydrophilicity is shown.

The present application relates to a kind of environment-friendly water-based phenolic resin anticorrosive coating and its preparation process, belong to the field of coating technology.The coating is made of water-based phenolic resin emulsion, hyaluronic acid-lysine composition load nano SiO2-ZnO composite filler, synergistic anticorrosive filler, wetting dispersant, film forming aid, leveling thickener, defoaming agent and deionized water.The superhydrophilic of hyaluronic acid fundamentally solves the dispersion and storage stability problem of phenolic resin in aqueous phase, and the amino group of its lysine side chain can also chemically bond with resin during curing, significantly enhancing the adhesion, flexibility and interfacial bonding strength of coating.At the same time, nano SiO2, ZnO and synergistic anticorrosive filler construct a multiple synergistic anticorrosive network of physical shielding, sacrificial anode and chemical passivation, achieving long-term active protection.The whole system uses water as medium, selects bio-based raw materials and low VOC additives, and the environmental protection is outstanding.

The application discloses a preparation method and application of a novel LBL marine biomass hydrogel composite membrane. The preparation steps of the hydrogel composite membrane are as follows: adding chitosan quaternary ammonium salt into 0.1 M tris-hydrochloric acid solution to obtain chitosan quaternary ammonium salt solution through heating and stirring; adding sodium alginate into tris-hydrochloric acid solution to obtain sodium alginate solution through heating and stirring; taking an ultrafiltration membrane as a base film, spreading the chitosan quaternary ammonium salt solution on the surface of the base film first, pouring away the excessive solution after standing, and then spreading the sodium alginate solution on the chitosan quaternary ammonium salt solution after heat treatment in an oven, pouring away the excessive solution after standing, and heat treating in the oven to obtain a self-assembled hydrogel composite membrane. The layer-by-layer self-assembled hydrogel composite membrane is obtained through repeating the above process for multiple times. The preparation method is simple, the material is green and environment-friendly, the obtained membrane surface has superhydrophilicity, obvious separation efficiency is shown in dye wastewater treatment, and strong anti-pollution performance is shown.

The invention discloses a light-induced self-cleaning high-flux high-adhesion oil-water separation membrane and a preparation method thereof, the method comprises the following steps: S1, preparing a metal-polyphenol porous coordination polymer suspension, and drying to obtain a metal-polyphenol porous coordination polymer solid; s2, divalent metal nitrate polyhydrate, trivalent metal nitrate polyhydrate and PCP are mixed in water, alkali liquor is dropwise added to adjust the pH to be neutral, LDHs grow on the surface of a PCP solid in situ, and LDHs-PCP is obtained; s3, performing plasma treatment on the substrate filter membrane; and S4, dispersing LDHs-PCP in water, and carrying out suction filtration on the dispersion liquid onto the plasma modified substrate filter membrane to obtain the light-induced self-cleaning high-flux high-adhesion oil-water separation membrane. The oil-water separation membrane disclosed by the invention has high flux, super-hydrophilicity and underwater super-oleophobicity; the oil-water separator has high mechanical strength and illumination self-cleaning capability, and can stably operate for a long time in a high-strength oil-water separation process.

The invention provides a tissue engineering heart valve stent with a sulfonated nano-enzyme coating as well as a preparation method and application of the tissue engineering heart valve stent, and belongs to the technical field of medical materials. The invention relates to a tissue engineering heart valve stent with a sulfonated nano-enzyme coating, which comprises an acellular matrix carrier, ruthenium / iridium-tannic acid nano-enzyme loaded on the acellular matrix carrier, and a sulfonated polymer coating fixed on the acellular matrix carrier and / or the surface of nano-particles through ultraviolet polymerization, the ruthenium / iridium-tannic acid nano-enzyme is formed by tannic acid TA, Ru < 3 + > and Ir < 3 + > through coordination. According to the invention, through double bionic activities of superoxide dismutase and nitric oxide synthase of ruthenium / iridium-tannic acid nano-enzyme and through the super-hydrophilicity and electrically neutral surface of the sulfonated polymer coating, collaborative regulation and control of O2-NO cascade catalysis and interface functions in a pathological microenvironment are realized; the structural and functional in-situ regeneration of the tissue engineering heart valve stent is promoted.

The invention discloses a coal gasification slag-based aerogel porous material and application thereof, and belongs to the field of compounds of non-metallic elements. The preparation method comprises the following steps: by taking regional bulk coal-based solid waste-coal gasification slag and a self-gelling natural polymer material as raw materials, pretreating the coal gasification slag to remove heavy metal ions, then preparing dispersion liquid from the coal gasification slag and a self-gelling natural polymer material solution, and carrying out first freeze drying to obtain a solidified material; then, soaking by using a cross-linking agent to form cross-linked aerogel, fully soaking the cross-linked aerogel by using a tert-butyl alcohol solution, and performing freeze drying for the second time to obtain the coal gasification slag-based aerogel porous material. The prepared composite aerogel has super-hydrophilicity, excellent water absorption and water retention properties and excellent photo-thermal conversion performance. Due to the characteristics, the composite aerogel can be used as a soil water-retaining agent or a soil conditioner; or is used as an interface evaporation material for treating high-salinity wastewater.

The invention discloses an aerogel-based evaporator with a double-network structure as well as a preparation method and application of the aerogel-based evaporator, and relates to the technical field of water treatment. According to the aerogel-based evaporator, sodium alginate and nanocellulose are used for constructing an interpenetrating dual-network as a framework, acidified carbon nanotubes are combined as a photo-thermal material, and the aerogel-based evaporator is prepared through a sol-gel method and a freeze-drying process. The double-network structure synergistically exerts the advantages of super hydrophilicity and high mechanical strength, and salt ion deposition and crystallization are effectively inhibited; the acidified carbon nanotubes guarantee efficient photo-thermal conversion, and the solar energy utilization rate is improved. The evaporator successfully solves the problems that traditional equipment is low in solar energy utilization rate, salt crystallization damages the evaporator and the like, has excellent mechanical stability, wide water body adaptability and light environment adaptability, and is environment-friendly in preparation process, easy to produce on a large scale and suitable for industrial production. And an efficient and stable novel technical scheme is provided for solar-driven water purification and seawater desalination.

The present invention relates to a method for preparing a self-cleaning raw ceramic glaze with a micro-nanostructured rough surface. The glaze raw materials are composed of the following weight percentages: kaolin 5.47-6.69%, albite 24.95-28.74%, potassium feldspar 24.86-28.82%, quartz 1.17-8.97%, calcite 1.83-9.84%, talc 2.55-3.05%, colemanite 14.49-27.26%, and titanium dioxide 6.15-7.08%. The self-cleaning raw ceramic glaze is obtained by batching, homogenizing, ball milling, screening, and aging according to the glaze formula. The present invention uses inexpensive mineral raw materials and utilizes the principle of high-temperature phase separation to generate uniformly sized, closely spaced phase-separated droplets in the glaze to construct a micro-nanoscale rough surface, thereby achieving super-hydrophilic self-cleaning properties on the glaze's macroscopic surface. Therefore, the industrialization prospect is broad.

This invention relates to the field of self-cleaning coating materials, and discloses the preparation and application of a nanofiber-confined Fe single-atom self-cleaning coating material. The invention uses wood nanofibers as a carbon-based carrier to obtain nanofiber-confined Fe single-atom materials. The three-dimensional network structure generated during the acidic hydrolysis of methyl orthosilicate enhances the bonding between the nanofiber-confined Fe single-atom materials, nano-silica, and nano-titanium dioxide nanoparticles. After hydrolysis, a diluent is added, and the reaction proceeds to obtain the nanofiber-confined Fe single-atom self-cleaning coating material. This self-cleaning coating material has a simple process, high operability, excellent antistatic properties, superhydrophilicity, and photocatalytic activity. It exhibits excellent anti-fouling potential in self-cleaning coating material applications and has broad application prospects.

The present invention discloses a novel biomass-based solar water evaporator and its preparation method and application, which relates to the field of energy conversion technology. The solar water evaporator comprises a water transmission layer, a heat insulation layer and a photothermal conversion layer, wherein the water transmission layer is a porous network skeleton in the shape of a super-hydrophilic vertical array pipe, the heat insulation layer is a super-hydrophilic and high-thermal-resistance silica aerogel coating forming a stable interface on the water transmission layer, and the photothermal conversion material has good photothermal conversion ability and is coated on the heat insulation layer to form a photothermal interface. The raw materials of the present invention are widely available and low in cost. The preparation method is simple, convenient and easy to implement, and can be assembled into a water evaporator with a fast water evaporation rate and high energy efficiency, so it is conducive to large-scale production. The present invention can be used for interfacial solar evaporation, has the advantages of efficient production of clean water, long-term stability, good anti-fouling and salt resistance, and has broad application prospects.

The present invention belongs to the field of sensor technology, and specifically relates to an ultrafast response titanium dioxide quantum dot / silicon dioxide composite film humidity sensor, a preparation method, and multifunctional applications. The sensor includes a sensing layer and a substrate, wherein the sensing layer is a titanium dioxide quantum dot / silicon dioxide film (TiO2QDs / SiO2), and the substrate can be an interdigitated electrode. The superhydrophilicity of TiO2QDs facilitates the high-speed adsorption and desorption of water on the film surface. The addition of SiO2 microsphere structures can further increase the specific surface area of the humidity-sensitive film and improve the humidity-sensitive performance of TiO2QDs. The humidity sensor of the present invention has excellent humidity sensing performance, including ultrafast response and recovery time, high sensitivity, good repeatability, and long-term stability. The sensor has application value in humidity alarms and voice recognition.

The invention discloses an amorphous TiO2 modified nanofiber membrane and a preparation method and application thereof, and belongs to the technical field of oil-water separation materials.Chitosan and polyacrylonitrile serve as raw materials to obtain a spinning solution, and a polyacrylonitrile / chitosan nanofiber membrane is obtained through electrostatic spinning; and impregnating the polyacrylonitrile / chitosan nanofiber membrane by adopting an amorphous TiO2 solution, so as to obtain the amorphous TiO2 modified nanofiber membrane. Chitosan is added into a polyacrylonitrile matrix, the mechanical property and hydrophilicity of polyacrylonitrile are improved through chitosan in electrostatic spinning, the polyacrylonitrile / chitosan nanofiber membrane is coated with amorphous titanium dioxide, strong oxidizing property is generated under ultraviolet light, oil stains and organic matter are decomposed, the self-cleaning capacity of the separation membrane is improved, pollution is reduced, and the separation membrane is environmentally friendly. Meanwhile, the surface of the membrane is endowed with super-hydrophilicity and shows super-oleophobicity underwater, so that the attachment of oil stains is effectively prevented, and the separation efficiency is improved.

The application comprises a bottom layer, a liquid absorption layer and an isolation layer which are sequentially arranged in a stacked mode, the bottom layer is provided with an inner surface facing the liquid absorption layer, an outer surface opposite to the inner surface and a plurality of through holes penetrating through the inner surface and the outer surface, and a plurality of micron-sized protrusions are arranged on the outer surface at intervals. The liquid absorption layer is a hydrophilic layer with super hydrophilicity, and the bottom layer and the isolation layer are hydrophobic layers. According to the application, a good healing environment can be provided, and the application is easy to strip from a wound surface.

The present application relates to the technical field of super-hydrophilic / super-oleophilic materials, and particularly to a preparation method of a super-hydrophilic photo-thermal composite material with the ability to absorb heavy oil underwater, which comprises the following steps: first, natural oligomeric amino polysaccharide is used to synergistically aminate raw cotton with amino silane coupling agent; then, based on the synergistic amination system of the raw cotton, polymeric active units and nano-scale heat-conducting particles are introduced into the raw cotton; and finally, the mixed liquid phase is cured by the hyperbranched polymer forming method to complete the construction of the super-hydrophilic photo-thermal composite material with the ability to absorb heavy oil underwater by the one-pot method. The raw materials of the present application are green and environmentally friendly, and the experimental steps are simple, safe and convenient. The prepared product has excellent super-hydrophilicity and super-oleophilicity in an air atmosphere, with a contact angle of 0°. In an underwater atmosphere, the product has super-hydrophilicity and excellent oil absorption performance, and still has stable super-hydrophilicity and oil absorption capacity after cyclic utilization in different atmospheres. In addition, the product has good photo-thermal performance and good absorption and separation capacity for viscous oil phases, which lays a foundation for wider application.

The invention belongs to the technical field of novel functional materials, and particularly relates to a Black-coated ZnO / Gr (black zinc oxide graphene) composite film and a preparation method thereof. In order to relieve the problem of shortage of fresh water resources, obtaining of the fresh water resources from the oil-containing sewage becomes another important means. The problems of accumulated oil pollution, residual emulsifier in separated penetrating fluid and the like in the traditional membrane separation technology are solved, the multifunctional Black-coated ZnO / Gr membrane with super hydrophilicity is prepared, the pollution caused by accumulated oil pollution of the membrane material is solved, and the process of obtaining the complex oily sewage into fresh water is realized. The Black-coated ZnO / Gr membrane has a specific multi-stage rough structure and a super-hydrophilic property, so that the Black-coated ZnO / Gr membrane is endowed with a firm hydration layer, and the separation of an oil-water mixture and actual degreasing wastewater is realized; under irradiation of visible light, recovery of separation efficiency and flux is realized.

The invention discloses an oil-water separation membrane and a preparation method thereof, the oil-water separation membrane comprises a punching substrate material and nanowires, the punching substrate material is a copper foil provided with array micropores, the array micropores are formed by laser processing, and the array micropores are formed by regularly arranging a plurality of micropores; the nanowire is a copper hydroxide nanowire; the punching substrate material is divided into a substrate area, a micropore edge area and a micropore wall area; the nanowires are distributed in the substrate area, the micropore edge area and the micropore wall area. The oil-water separation membrane disclosed by the invention has long-acting super-hydrophilicity and underwater super-oleophobicity and is high in oil-water separation efficiency; efficient and stable separation of various oil-water mixtures such as n-octane, methylbenzene and soybean oil can be realized, and the separation efficiency is higher than 99%.

The invention discloses a super-hydrophilic photo-thermal aerogel material capable of being prepared at normal pressure and application of the super-hydrophilic photo-thermal aerogel material, and belongs to the technical field of material preparation and seawater desalination. The preparation method comprises the following steps: mixing waste cotton fibers, carbon black, copper sulfide, sodium alginate and water, homogenizing, adding calcium carbonate, homogenizing again, removing bubbles, freezing to obtain hydrogel, carrying out solvent replacement, and drying at normal pressure to obtain the integrated and large-scale super-hydrophilic elastic photo-thermal aerogel. The prepared super-hydrophilic photo-thermal aerogel has good super-hydrophilicity, elasticity and photo-thermal conversion performance, the preparation method is simple in process, complex synthesis equipment and freeze-drying equipment are not needed, the photo-thermal conversion performance can be achieved without further carbonization or secondary modification, and the super-hydrophilic photo-thermal aerogel is suitable for large-scale production. And large-scale mass production can be realized under simple conditions.

The invention relates to the technical field of biomedical materials, and discloses a bioglass / polycaprolactone stent as well as a preparation method and application thereof. The bioglass / polycaprolactone scaffold is prepared from the following raw materials: polycaprolactone, strontium-doped bioglass, a dopamine solution and a solvent I. According to the bioglass / polycaprolactone scaffold provided by the invention, through the unique collaborative design of a strontium-doped bioglass mesoporous structure and a polydopamine intelligent coating, precise controlled release and immune-osteogenesis dual-function regulation of strontium ions are realized, and the scaffold has excellent mechanical properties (the compressive strength is about 22.5 MPa) and an ideal pore structure (the porosity is about 60%); due to the polydopamine coating, the surface of the stent achieves super hydrophilicity (the contact angle is 0 degree), and cell adhesion and proliferation can be remarkably promoted; the scaffold can synchronously induce polarization of macrophages to M2 type and promote osteogenic differentiation, and solves the key problems of strong hydrophobicity and single function of the traditional scaffold.

The application discloses a kind of biomimetic superhydrophilic / underwater oleophobic MOF coating net film and its application, the preparation method of the coating net film is: first, stainless steel net film is washed and phosphorized, then a layer of MOF material is deposited on the net film by electrodeposition method, after calcination, polyvinylpyrrolidone is used to hydrophilic modification of MOF coating net film, i.e. the biomimetic superhydrophilic / underwater oleophobic MOF coating net film is obtained.The MOF coating net film obtained by the application shows good spreading and rapid permeability to water, the contact angle with water is 0°, and the water passing rate is 2 drops / s, showing excellent superhydrophilic performance.Meanwhile, through the cycle separation test of MOF coating net film, it is found that the separation efficiency is still above 98.0% after 35 cycles of oil-water separation, indicating that the prepared net film has good superhydrophilicity and durability.

The application discloses a Janus cotton fabric with directional sweat and photothermal evaporation functions and a preparation method thereof. The Janus cotton fabric is composed of a cotton fabric base, a photothermal layer arranged on the double-side surfaces of the cotton fabric base, and a hydrophobic layer arranged on the protruding part of the inner side of the cotton fabric base, wherein the hydrophobic layer is located on the surface of the photothermal layer; the inner side of the Janus cotton fabric is a structure with concave-convex alternation; the protruding part of the inner side of the Janus cotton fabric has hydrophobicity, and the concave part has hydrophilicity; and the outer side of the Janus cotton fabric has superhydrophilicity. The Janus cotton fabric provided by the application combines the photothermal conversion and the Janus characteristics together, the photothermal effect generated by the photothermal layer can quickly evaporate the sweat transported from the internal hydrophobic surface to the external superhydrophilic surface in a directional manner, so that the comfort during physical activity can be ensured.

The application discloses a method for preparing a TiO2 electrode by chemical etching and oxygen-rich annealing treatment. The method comprises the following steps: sequentially performing oil removal treatment and cleaning treatment on a titanium sheet to remove oil stains, organic residues and processing impurities on the surface; placing the obtained titanium sheet into an alkaline solution to perform chemical etching, heating and reacting to obtain a TiO2 sensitive layer, and then cleaning and drying; and performing oxygen-rich annealing treatment on the titanium sheet with the TiO2 sensitive layer to obtain the TiO2 electrode. The preparation process of the chemical etching and the oxygen-rich annealing is synergistic, the electrode surface superhydrophilicity and the sensitive response characteristics to pH value are maintained, the wear resistance and the use reliability of the electrode in the cultivation medium are improved when the electrode is repeatedly inserted and pulled out, and thus the durability of the electrode is improved.

This invention discloses an organic-inorganic composite superhydrophilic self-cleaning coating, its preparation method, and its application. The organic coating uses a water-based transparent polyurethane resin, whose raw material, the hydroxyl resin, is bio-modified to improve its hydrophilicity, thereby enhancing the adhesion between the coating and the glass substrate and the coating's stability in an aqueous environment. The inorganic nanomaterial used is zinc oxide, which can photocatalytically induce superhydrophilic properties, facilitating self-cleaning through water rinsing while providing hardness and increasing the coating's wear resistance. The coating of this invention employs a dual-spray process, overcoming the problem that traditional single-spray organic-inorganic composite coatings cannot accurately represent the microstructure and roughness of inorganic particles.

The application belongs to the technical field of solar cells, and particularly relates to a high-transmittance nano coating for transparent conductive oxide (TCO) glass of a perovskite solar cell and a preparation method thereof. The high-transmittance nano coating for the TCO glass of the perovskite solar cell is prepared from a composite silica dispersion liquid, a polyhydroxy polymer dispersion liquid and a wetting and leveling agent. The high-transmittance nano coating has higher mechanical properties, higher stability and service life, superhydrophilicity and self-cleaning property, can be prepared in a normal temperature environment, is suitable for the perovskite solar cell, and can increase the light transmittance of the TCO glass of the perovskite solar cell.

The present invention relates to a super-hydrophilic titanium oxide nanotube electrode electrodeposited with metal nanoparticles and, more specifically, to a method for manufacturing a super-hydrophilic titanium oxide nanotube-based electrode electrodeposited with metal nanoparticles through simple electrooxidation and electrodeposition.

The present application belongs to the technical field of functional micro / nanofiber preparation, and particularly relates to a unidirectional moisture-conducting micro / nanofiber membrane and a centrifugal spinning preparation method thereof. The present application mixes a polymer and a solvent for centrifugal spinning, and obtains a porous fiber membrane product by using solvent rapid evaporation to form pores. In the spinning process, a high-power light source is irradiated, and the light source is directly irradiated on the spinneret and the spun fiber. In the irradiation process, the temperature of the spinning environment is rapidly increased, and the volatilization of the solvent on the fiber after the fiber is formed is accelerated, which is beneficial to the construction of the porous structure of the fiber. The SBS porous membrane contains hydroxyl radicals through low-temperature cold plasma modification, and the SBS porous membrane and acrylamide occur radical graft polymerization under the protection of nitrogen, so that the SBS porous membrane is endowed with superhydrophilicity. Then, a unidirectional moisture-conducting fiber membrane is prepared by using a hot-pressing composite method.

This invention belongs to the field of functional textile materials and interface wettability control technology, and discloses a method for preparing cotton fabric with underwater superoleophobic and oil-water superhydrophobic properties and its application in oil-water separation. The method first dissolves nano-titanium dioxide and n-octanol in ethanol to obtain an alcohol phase mixture; then dissolves dopamine hydrochloride and Tris-HCl in deionized water to obtain an aqueous phase mixture; the two phases are mixed and the pH is adjusted to 8.0–8.5, allowing dopamine to oxidize and self-polymerize, forming a composite coating system synergistically with n-octanol, nano-titanium dioxide, and polydopamine; the cotton fabric is then impregnated and dried at 75–85°C for 2–4 h to obtain a cotton fabric with a surface polydopamine / n-octanol / nano-titanium dioxide composite coating. This fabric exhibits superhydrophilicity and oleophilicity in air, with underwater oil contact angles and oil-water contact angles both greater than 155°. Washing with ethanol, drying, and re-pre-wetting allow for reversible switching between the two superwetting properties. It can be used for the efficient separation of oil-water mixtures and oil-in-water and water-in-oil emulsions under gravity.