60 results about "Superhydrophilicity" patented technology

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.

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 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.

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 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 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.

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.

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.

The invention discloses a preparation method of a nano Mg (OH) 2-PPS fabric composite diaphragm, which comprises the following steps: introducing free radicals into a PPS fabric, carrying out acid treatment, and introducing an oxygen-containing hydrophilic functional group into a diaphragm interface to obtain a hydrophilic PPS fabric diaphragm. Then, Mg (OH) 2 grows on the fiber surface of the hydrophilic PPS fabric diaphragm by using an in-situ growth method, so that the composite membrane is endowed with high air tightness and low membrane resistance, and the alkali resistance and the electrolytic stability of the diaphragm are improved. The prepared composite membrane shows super-hydrophilicity, water drops can be completely absorbed within 1 second, and after 500 hours of tests are carried out in actual electrolysis production, various properties of the composite membrane are kept stable, and the composite membrane shows excellent long-term stability and electrolysis performance.

The application belongs to the technical field of high polymer materials, and particularly relates to a super-hydrophilic cool master batch and a preparation method and application thereof. The super-hydrophilic cool master batch is prepared by pre-dispersing the hydrophilic modifier to firmly coat the surface of the heat-conducting filler, and further combining the bridging action of the subsequent maleic anhydride grafted polyolefin, so as to effectively solve the compatibility problem of the inorganic filler and the polyolefin, and simultaneously give the master batch the persistent super-hydrophilic property and the high-efficiency heat-conducting capacity, and solve the defect that the hydrophilic-heat-dissipation function of the traditional material is difficult to be compatible. Gradient temperature control and special screw design are adopted to protect the heat-sensitive components and realize uniform dispersion of the filler. The subsequent rapid water cooling process locks the surface hydrophilic function of the master batch, and avoids migration failure. The super-hydrophilic cool master batch obtained by the application has the persistent super-hydrophilic property and the high-efficiency heat-conducting capacity.

The invention discloses a super-hydrophilic-underwater oleophobic ceramic membrane as well as a preparation method and application thereof, and relates to the technical field of ceramic membrane preparation, a ceramic support is soaked in TiO2-SiO2-ZrO2 ternary hydrophilic sol in a certain proportion for a certain time by a soaking method, and low-temperature sintering is performed after drying so as to increase the roughness of the membrane surface and membrane pore channels to improve the hydrophilicity of the membrane, so that the super-hydrophilic-underwater oleophobic ceramic membrane is prepared. And chemically grafting a chitosan oleophobic layer through a surface coating method to prepare the super-hydrophilic-underwater oleophobic ceramic membrane. The surface of the ceramic membrane and the interiors of pore channels have super-hydrophilicity, the contact angle is 2 degrees, the surface of the ceramic membrane is endowed with underwater oleophobicity through a surface coating method of the oleophobic coating liquid, the contact angle with soybean oil underwater is 151 degrees, the ceramic membrane is prevented from being in direct contact with grease during oil-water separation, membrane layer pollution is reduced, and the running flux is improved.

The invention discloses a super-hydrophilic anti-fouling anti-fog silicone rubber composite material. The silicone rubber composite material comprises the following raw material components: a vinyl-containing silicone rubber composite body material and a hydrophilic solution, the vinyl-containing silicone rubber composite body material comprises the following raw material components in percentage by mass: 19wt%-78wt% of vinyl-containing silicone rubber; 10 wt%-70 wt% of a modified monomer; 10 wt% to 70 wt% of a diluent; 0.1 wt% to 5 wt% of a photoinitiator; the hydrophilic solution comprises the following raw material components in percentage by mass: 2wt%-95wt% of an acrylic monomer; 0.1 wt% to 5 wt% of a photoinitiator; and the balance of solvent. The super-hydrophilic anti-fouling and anti-fogging silicone rubber composite material has super-hydrophilicity and good anti-fouling and anti-fogging performance, the preparation method is simple and effective, the cost is low, and the super-hydrophilic anti-fouling and anti-fogging silicone rubber composite material has very good medical instrument application prospects.

The present disclosure relates to cleansing compositions and particularly foaming cleansing compositions including one or more surfactants, one or more viscosity increasing agents, one or more emulsifiers, and one or more foam boosting agents. The one or more foam boosting agents includes a superhydrophilic amphiphilic copolymer. The disclosure also relates to the use of such cleansing formulations on human skin.

This invention relates to a method for preparing and applying a self-cleaning antibacterial and antireflective coating based on the sol-gel method. The invention involves mixing nano-silica and nano-titanium dioxide prepared by the sol-gel method in a specific ratio, then applying the mixture to a glass substrate using a dip-coating method to obtain a nano-coating. The glass substrate is then heated and cured to obtain the self-cleaning, antibacterial, and antireflective nano-coating. The mixing of silica and titanium dioxide effectively increases the surface area of ​​titanium dioxide, resulting in a self-cleaning, antibacterial, and antireflective film. The introduction of titanium dioxide enhances the antibacterial properties of the antireflective coating, solving the problem of easy microbial contamination. Furthermore, the mixture of titanium dioxide and silica addresses the reduced light transmittance caused by a single titanium dioxide coating, giving the coating superhydrophilic properties and achieving a self-cleaning effect. The preparation process is simple and inexpensive, making it suitable for large-scale industrial production.

The invention discloses a high-capacity super-hydrophilic ion chromatographic column filler and a preparation method thereof, relates to the technical field of new materials, and solves the problem that some ion peaks are seriously trailed due to strong hydrophobicity of the filler. PS-DVB is used as a base ball of the filler, and a sulfonic group is grafted on a benzene ring of the base ball through a covalent bond; the sulfonic group is combined with a long molecular chain containing a tertiary amine group through an ionic bond; the long molecular chain is generated by reacting an amine nucleophilic reagent with a first double epoxy reagent; the tertiary amine group at one end of the long molecular chain and the sulfonic acid group on the surface of the base ball form an ionic bond, and the long chain is anchored on the surface of the base ball; an epoxy group at the tail end of the long molecular chain and a second diepoxy reagent or a hydrolysate thereof are subjected to a ring-opening reaction to form a cross-linked bond, and a multi-layer network structure is constructed; carrying out nucleophilic reaction on an epoxy group of the second double epoxy reagent and a tertiary amine group in the anchored long molecular chain to generate a quaternary ammonium group; and the other epoxy group of the second double epoxy reagent reacts with a tertiary amine nucleophilic reagent to generate a quaternary ammonium salt functional group.

The application relates to a material containing a wetting surface based on an etched microstructure and a preparation method and an article thereof. The preparation method of the wetting surface based on the etched microstructure comprises the following steps: cleaning a metal substrate; immersing the cleaned metal substrate in an alkali solution for chemical etching to prepare a chemical etching substrate; performing hydrothermal reconstruction treatment on the chemical etching substrate in water to prepare a hydrothermal reconstruction treatment product; after the hydrothermal reconstruction treatment product is cooled, the hydrothermal reconstruction treatment product is placed in water for 18 h-30 h, and after being taken out, the hydrothermal reconstruction treatment product is subjected to first drying treatment to obtain a metal substrate material with a super-hydrophilic surface. The metal substrate material prepared by the above method can stably realize an extreme wetting state of super-hydrophilicity, and can still maintain good super-hydrophilic performance and structural integrity under the conditions of water flow scouring and mechanical action, and exhibits excellent durability and broad engineering application prospects.

The application discloses a kind of self-cleaning coating for ceramic-based photovoltaic glass and preparation method thereof, and the self-cleaning coating is composed of the following components by mass fraction: 22-25 parts of A nano-silica sol, 3-4 parts of B nano-silica sol, 0.05-0.06 parts of lithium polysilicate, 0.75-0.85 parts of nano-alumina sol, 0.05-0.06 parts of ferric chloride and 200-220 parts of deionized water. The self-cleaning coating formed on the surface of photovoltaic glass based on the coating has good super-hydrophilic performance and self-cleaning performance, and is high in transparency, strong in wear resistance, good in adhesion to the substrate, not easy to fall off from the substrate, and can long-term play good self-cleaning performance. Meanwhile, the coating also has good stability, and still maintains good uniformity after standing still for one week.

The application discloses a surface structure modified bioceramic bone repair bracket and a preparation method thereof. The preparation method comprises the following steps: step S1: a mixture containing ceramic powder, photosensitive resin and dispersing agent is ball milled, printed, discharged, sintered 1, and a porous structure three-dimensional bracket is obtained; and step S2: the porous structure three-dimensional bracket is immersed in an immersion liquid, and a surface structure modified bioceramic bone repair bracket is obtained. The immersion liquid comprises a first layer of immersion liquid and a second layer of immersion liquid. The bioceramic bracket provided by the application has superhydrophilicity, high surface activity, and a fast fusion speed with bone tissue, is beneficial to osteogenesis and vascularization, and is a good bone repair material with biological activity.

This invention discloses the preparation of photocatalyzed amylopyridine-oxime porous single-atom fibers and their application in seawater uranium extraction. Using polyacrylonitrile nanofibers as a framework, the target fiber material is obtained through a process of "high-energy ball milling – electrospinning – template elution – post-functionalization". High-energy ball milling transforms the metal ligand material into single atoms and stabilizes their dispersion; electrospinning constructs the macroscopic fiber structure; template elution simultaneously constructs hierarchical channels and exposes single-atom active sites in situ; and the amylopyridine-oxime reaction introduces uranium-trapping groups. The resulting material possesses both high-density, highly exposed single-atom photocatalytic centers and highly efficient amylopyridine-oxime trapping sites, synergistically achieving efficient reduction and fixation of uranyl ions under light irradiation, significantly improving the capacity and rate of seawater uranium extraction. This material exhibits superhydrophilicity and excellent antibacterial properties, making it suitable for real seawater. It provides a new material and strategy for solving problems such as active site aggregation, low mass transfer efficiency, and limited functionality in seawater uranium extraction.

The present invention is concerned with a method of direct synthesis of co-products of at a first co-product and a second co-product. The first co-product is superhydrophilic carbon nitride thin film and the second co-product is superhydrophilic carbon nitride powder. The method has a step of using a guanidine carbonate salt as a precursor material. The present invention is also concerned with carbon nitride co-products. The carbon nitride co-products has a first co-product of superhydrophilic carbon nitride thin film and a second co-product of superhydrophilic carbon nitride powder. The superhydrophilic carbon nitride thin film has chemical formula of CNx, wherein x is 0.86-1.04, and the superhydrophilic carbon nitride powder has a chemical formula of g-C3N4.

The invention discloses an asymmetric wetting film for a homogeneous miscible substance of purified water and an organic solvent and a preparation method of the asymmetric wetting film. The invention belongs to the field of membrane separation, and particularly relates to an asymmetric wetting membrane for purifying water and organic solvent homogeneous miscible substances, which comprises an upper ceramic membrane with under-oil super-hydrophilicity and a lower hydrophobic membrane which are overlapped together in a direct contact manner to form the asymmetric wetting membrane, wherein the under-oil super-hydrophilic property of the ceramic membrane refers to that the time for water drops to completely wet the surface of the ceramic membrane is less than 5 seconds in a non-polar organic solvent environment; the hydrophobic membrane meets the requirement that the contact angle of water in air is larger than 120 degrees. According to the asymmetric wetting membrane disclosed by the invention, the purification of the water-miscible organic solvent is realized through the difference interaction of the upper and lower filter membranes on the polarity of water and the organic solvent.

The invention particularly relates to a preparation method of a photo-thermal response type diamond super-hydrophilic enhanced heat exchange surface, which comprises the following steps: pretreating diamond, etching a regularly arranged microstructure by femtosecond laser, and inducing to generate a uniform nano periodic structure through secondary scanning, thereby constructing a stable micro-nano composite structure. And the surface of the diamond is super-hydrophilic. And furthermore, the surface of the diamond is coated with the photo-thermal response film layer, so that the surface has near-infrared light thermal responsiveness, and intelligent regulation and control of hydrophilicity are realized. The method has the advantages of being simple in process, high in machining efficiency and precision, capable of accurately regulating and controlling structural parameters and the like, the heat exchange area is remarkably increased, the heat exchange performance is enhanced, heat exchange deterioration under high-heat flow can be avoided through light regulation and control, and the method has wide application prospects in the fields of heat dissipation of high-power electronic devices and the like.

The invention discloses a Janus sponge with rapid oil-water separation capacity and a preparation method thereof.The Janus sponge comprises a three-dimensional porous elastic matrix, the three-dimensional porous elastic matrix comprises a Janus structure, an internal network structure of the Janus structure forms super-hydrophilicity, a super-hydrophobic layer with preset thickness is formed on the outer layer of the Janus structure, and the thickness of the super-hydrophobic layer is larger than that of the three-dimensional porous elastic matrix. The super-hydrophobic layer is formed by modifying the surface layer of the three-dimensional porous elastic matrix through a low-surface-energy substance. The asymmetric wettability of the anus structure is utilized, water is selectively repelled, oil is captured, rapid oil absorption is achieved, oil absorption plastic is improved, the cost is saved, the environmental protection performance is kept, and the oil-water separation efficiency is further improved.