115 results about "Superhydrophilicity" patented technology

The invention provides a laser polishing device combining gas protection and substrate heat dissipation and a using method. The device comprises a focus lens (1), a laser beam (2), a to-be-polished sample piece (3), a gas nozzle (4), a gas pipe (5), a high-pressure gas cylinder (6), a dust collector (7), a cooling liquid level (8), a metal substrate (9), an objective table (10), a water tank (11) and a laser (12). The invention further relates to a using method of the device. A micro-nano coarse structure is formed on the surface of the metal substrate through chemical etching, electrochemical etching or laser etching and the like, then a hydrophilic oxide layer is introduced through oxidation treatment or plasma treatment, and the super-hydrophilic performance of the metal substrate is further enhanced. The device has excellent liquid cooling capacity, gas protection performance and oxidation resistance, heat can be efficiently conducted and dissipated in the laser polishing process, the temperature uniformity of the surface of a sample is ensured, and overheating and oxidation phenomena are prevented.

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 relates to the technical field of functional coating materials, in particular to a zwitterionic polymer / halloysite nanotube-based coating and a preparation method of self-cleaning glass. The preparation method of the self-cleaning glass comprises the following steps: soaking treated glass in cleaning slurry containing HNTs-NH2 and a zwitterionic polymer SBMA-co-AA, washing with deionized water, and drying in a vacuum drying oven at 60 DEG C to finally obtain the glass with the self-cleaning and anti-fog functional coating. The self-cleaning coating is prepared from the following raw materials in parts by weight: a zwitterionic polymer, MES, EDC, NHS, HNTs-NH2 and deionized water. The self-cleaning coating provided by the invention has super-hydrophilicity, anti-pollution and anti-fog functions and self-healing capability, can effectively remove pollutants on the surface of glass, improves the self-cleaning effect and prolongs the service life.

The present disclosure provides a bionic Australian thorny devil grinding wheel, a grinding device, and a preparation process, and relates to the field of grinding equipment. For the problem of the poor effect of conveying grinding fluid by a grinding wheel at present, imitating semi-open capillary channels and a honeycomb structure on the skin of the Australian thorny devil, prisms with isosceles trapezoidal bottom surfaces are arranged on a matrix in sequence to form directional liquid self-conveying flow channels and a superhydrophilic honeycomb-like hexagonal distribution structure.

The invention discloses an anti-reflection wear-resistant nano hydrophilic anti-fog lens and a preparation method thereof, and the method comprises the steps: carrying out the injection molding, ultrasonic deep cleaning and surface cleaning treatment of the lens, and obtaining a clean substrate layer; preparing an organic silicon resin hardening liquid, coating the surface of the substrate layer with the organic silicon resin hardening liquid, and curing to obtain an organic silicon resin layer; preparing a nano hydrophilic coating; cleaning the surface of the organic silicon resin layer, keeping the surface dry, and activating by using plasma equipment; and coating the surface of the activated organic silicon resin layer with a nano hydrophilic coating, and then baking at the temperature of 40-120 DEG C for 6-0.5 h to obtain the nano hydrophilic coating. According to the invention, a nano hydrophilic coating containing modified silicon dioxide is adopted to be in covalent bond connection with an active group in the organic silicon resin layer, so that lasting hydrophilic modification of the substrate layer is realized, a water drop contact angle is less than 6 degrees, super-hydrophilicity can be presented without illumination, and the super-hydrophilic group has low chemical activity, is not easy to pollute and is convenient to clean; the service life is long.

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 an interfacial polymerization PBI modified alkaline water electrolysis composite diaphragm as well as a preparation method and application thereof. The alkaline water electrolysis composite diaphragm provided by the invention has excellent super-hydrophilicity, high gas barrier property, low surface resistance and alkali-resistant stability. The method has the advantages of stable physical properties, mild and simple process, green and environment-friendly raw materials, low cost and industrial application potential.

The invention provides an ultrathin heat dissipation composite coating, preparation of the ultrathin heat dissipation composite coating and an ultrathin heat dissipation metal plate comprising the ultrathin heat dissipation composite coating. The preparation method comprises the following steps: preparing a silicon dioxide precursor sol and a titanium dioxide precursor sol by a sol-gel method, adding the silicon dioxide precursor sol and the titanium dioxide precursor sol into a solvent to obtain composite slurry, coating the surface of a substrate with the composite slurry, and drying to obtain the ultrathin heat dissipation composite coating. The thickness of the ultra-thin heat dissipation composite coating is 50-100 nm, and the ultra-thin heat dissipation composite coating has super-hydrophilicity and super-lipophilicity, so that the contact area between a cooling working medium and the ultra-thin heat dissipation metal plate is increased, and the comprehensive heat dissipation capacity is improved.

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 invention relates to the technical field of inorganic-organic composite coating materials, and discloses a composite nano super-hydrophilic coating based on template induction and a preparation method thereof.The composite nano super-hydrophilic coating comprises a coating body, and the coating body comprises, by mass, 25%-45% of propanesulfonic aminopropyl silane. According to the composite nano super-hydrophilic coating based on template induction and the preparation method thereof, compared with a traditional hydrophilic coating, the initial contact angle of the composite nano super-hydrophilic coating based on template induction is smaller than or equal to 3 degrees, instant spreading of water drops can be achieved, the super-hydrophilic requirement is met, and the composite nano super-hydrophilic coating based on template induction is prepared through the PVP template induction effect. Hydrophilic groups are directionally enriched on the surface of the coating to form a stable super-hydrophilic interface. Besides, the coating can still keep super-hydrophilicity in the long-time use process, after an ultraviolet aging test, the contact angle of the coating is still kept within 10 degrees and is far superior to that of a traditional silane coating, and the long-term stable super-hydrophilicity of the coating is proved.

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.

A nano-inorganic composition according to an embodiment of the present disclosure includes and is not limited to excellent mechanical characteristics such as surface hardness and wear characteristics, chemical stability such as water resistance, acid resistance, and alkali resistance, and excellent thermal stability, as the composition is comprised of inorganic materials. In addition, the nano-inorganic composition may be controlled to have super-hydrophilic, hydrophilic, or hydrophobic properties, depending on coating methods. The nano-inorganic composition also has excellent surface contamination resistance and easy-clean properties depending on the characteristics of the thin film coating. Also, the nano-inorganic composition has excellent optical properties such as light transmittance and light reflectance.

The present invention discloses a corrosion-resistant polyionic liquid coating and a preparation method thereof. In the present invention, the ionic liquid monomer 3-ethyl-1-vinylimidazolium bromide is used to prepare polyionic liquid (PIL) by free radical polymerization, and then it is coated on the Cu@Cu(OH)2 filter material with superhydrophilic Cu(OH)2 nanoneedles coated copper mesh. Using the polyionic liquid as a protective coating for Cu(OH)2, the prepared Cu@Cu(OH)2-PIL filter material not only has the ability of oil-water separation in wastewater environment, but also has the ability to separate organic solvents with different polarities to a certain extent. XRD, SEM, XPS and other methods are used to analyze Cu@Cu(OH)2 and Cu@Cu(OH)2-PIL, as well as Cu@Cu(OH)2 and Cu@Cu(OH)2-PIL after being soaked in acid, alkali and salt solutions. It is found that the structure of the copper hydroxide layer on the surface of Cu@Cu(OH)2 collapses seriously after being soaked in NaOH and NaCl; after being soaked in HCl, the surface Cu(OH)2 completely reacts with HCl and loses the separation ability. However, the Cu@Cu(OH)2-PIL coated with PIL still retains a complete nano-copper hydroxide layer after being soaked in NaOH and NaCl, and still retains part of Cu(OH)2 after being soaked in HCl.

The invention relates to a metal organic framework material with super-hydrophilicity and strong affinity as well as a preparation method and application thereof, and belongs to the technical field of nano materials and biomedical application thereof. According to the invention, the UiO-66-NH2 metal organic framework material is modified by polyvinylpyrrolidone and glucose 6-phosphate to prepare the metal organic framework material complementarily modified by an amide group and a hydroxyl group, and the metal organic framework material has excellent super-hydrophilicity and strong affinity. The synthesis process of the metal organic framework material provided by the invention is simple and efficient, the detection sensitivity of low-abundance glycopeptides can be remarkably improved, efficient and specific enrichment of glycopeptides can be realized, and the metal organic framework material shows huge potential in glycoprotein enrichment and separation of simple or complex biological samples, and has wide application prospects. The method is expected to play an important role in proteomics, modification omics, disease diagnosis, biomarker identification and clinical research.

The present invention relates to an anti-oil pollution core-shell nanofiber membrane and a preparation method thereof. First, a core layer polymer solution is prepared, and then a mixed solution of sodium alginate and a water-soluble polymer in the shell layer is prepared; finally, the core layer and shell layer spinning solutions are passed through a coaxial electrospinning device to prepare core-shell structured nanofibers with a polymer as the core and a water-soluble polymer and sodium alginate as the shell; the sodium alginate in the shell layer of the prepared nanofiber membrane is crosslinked, and then the water-soluble polymer is removed by washing with water, so that the shell layer of the obtained core-shell structured nanofibers is a homogeneous component of sodium alginate. The method of the present invention is simple and easy to implement, and the obtained fiber membrane has superhydrophilic properties and can be applied to the field of anti-pollution membranes for oil-water separation.

The invention discloses an upward-convex steepest curve closed boundary hydrophobic patterning super-hydrophilic surface for strengthening liquid film boiling heat transfer and a processing method and application, and belongs to the field of boiling heat transfer. The substrate is super-hydrophilic; the closed boundary pattern is hydrophobic / super-hydrophobic, is of a hollow structure formed by closing a steepest curve, and is wedge-shaped or spindle-shaped. The method has great application prospects in the fields of promoting rapid aggregation and separation of phase change heat transfer bubbles, strengthening liquid film boiling heat transfer and the like.

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.