56results about How to "Stable super hydrophobic performance" patented technology

The invention discloses a transparent super-hydrophobic coating material. The raw materials of the transparent super-hydrophobic coating material comprise gas-phase silica nano-particle dispersion liquid which consists of gas-phase silica nano-particles and a solvent, and a hydrophobic treating agent. The invention further discloses a preparation method of a transparent super-hydrophobic coating; a coating of a micro-nano structure is prepared by rubbing and coating a substrate with the gas-phase silica nano-particle dispersion liquid, and then the coating is subjected to surface hydrophobization treatment by the hydrophobic treating agent to obtain the transparent super-hydrophobic coating. According to the super-hydrophobic coating material provided by the invention, hydrophobization treatment manners can be changed flexibly according to the difference of coated substrates; the method for preparing the super-hydrophobic coating has low requirement on equipment; the using cost is extremely low; the method is simple; the coating application is convenient; a large-area high-efficiency super-hydrophobic coating can be prepared; the prepared super-hydrophobic has excellent super-hydrophobicity, high transparency, droplet impact resistance, temperature and pH stability, durability, and repeated rubbing and coating capacity, and can be applied to almost all currently known solid surfaces.

The invention provides a nanofiber membrane for membrane distillation and a preparation method of the nanofiber membrane. The nanofiber membrane consists of nanofibers and nano branch structures distributed on the nanofibers. According to the method, a spraying (or atomizing) technology and an electrostatic spinning technology can be simply implemented synchronously, and the nanofiber membrane with superhydrophobic property for membrane distillation is prepared in a combined manner. The preparation method is simple, the process is easy to control, complicated preparation steps and expensive post treatment equipment are not required, the prepared nanofiber membrane is high in porosity, the surface of the membrane has uniform and excellent super-hydrophobicity, the plane, which is formed by the nanofibers, of each layer in the nanofiber membrane has the super-hydrophobicity, and therefore, the wetting resistance of the membrane can be greatly improved. The problems of low membrane flux and easiness in wetting are solved effectively.

The invention relates to a technology for preparing bionic super hydrophobicity surface, especially Al or Al alloy bionic super hydrophobicity surface. The method is pre-oxidizing Al or Al alloy and chemical modifying the surface to form bionic super hydrophobicity surface. Dropping pure water, acid or alkaline liquid to the surface of Al or Al alloy for contact angle detection, the contact angles are all over 150degree.

The invention discloses a preparation method for a super-hydrophobic metal surface. The method comprises the following steps: constructing a micrometer structure on the surface of a frequently used engineering material (such as copper, iron, stainless steel, nickel, aluminum, an aluminum alloy and a high-molecular section covering the above-mentioned metal through chemical plating) by using an electrocoppering process; then constructing a nanometer structure by using a chemical silvering process; and carrying out modification with low-surface energy substances like octadecanethiol so as to obtain excellent and stable super-hydrophobicity. The method has a wide application scope and can be used on pure metal, alloys and metalized high-molecular sections; an obtained surface has stable and reliable surface performance, strong film-substrate bonding force and good corrosion resistance, especially good acid resistance, can be extensively applied in fields like self-cleaning, water prevention and dehumidification, corrosion prevention, fluid drag reduction, frost prevention and condensation and heat exchange, and has an industrialization value.

The invention discloses a preparation method of a water-based super-hydrophobic material. The method comprises the steps that 1, a silane coupling agent is used for modifying the surface of silicon dioxide, and the silicon dioxide with double bonds on the surface is obtained; 2, an emulsion polymerization method is adopted for grafting hydrophobic polymer long chains to the surface, and the water-based super-hydrophobic material is prepared. When the polymer is under the glass-transition temperature or above, chains of the polymer begin to move, the chains can be twisted, micro-balls of materials are combined more tightly, and therefore the nano-particles are not likely to be disengaged, the abrasion resistance of the material is enhanced, and the defects caused by adopting an adhesive areavoided. By adopting the emulsion polymerization method, no organic solvent is adopted, environment contaminations are small, the cost is low, and the preparation process is simple.

The invention relates to a strawberry-shaped super-hydrophobic composite microsphere and application thereof. The microsphere is prepared through the following steps that (1) an amino polystyrene microsphere, ethyl alcohol, ethyl orthosilicate and distilled water are added into a reactor, and take a reaction for 24h at room temperature; the product is washed with ethyl alcohol; after vacuum drying is performed, a strawberry-shaped composite microsphere is obtained; (2) the strawberry-shaped composite microsphere, a solvent and a silane coupling agent are added into the reactor; the reaction is performed for 5 to 15h under the condition of 25 DEG C to 100 DEG C; the product is centrifuged to obtain the strawberry-shaped super-hydrophobic composite microsphere. The strawberry-shaped super-hydrophobic composite microsphere and epoxy resin are matched to be used as a super-hydrophobic coating; the excellent and stable super-hydrophobic performance is realized; muddy water is splashed on the prepared super-hydrophobic surface; the super-hydrophobic surface cannot be polluted by the muddy water, so that the self cleaning function of the surface is realized.

The invention provides a superhydrophobic fibrofelt and a preparation method thereof. The preparation method comprises the following steps: ultrasonically cleaning the fibrofelt in acetone, absolute ethanol and deionized water successively, and then drying the fibrofelt; adding room-temperature-cured fluorocarbon resin (FEVE) and two-component rigid polyurethane resin (SRP-FC) into an organic solvent, and carrying out uniform mixing under stirring so as to form a stable resin solution; directly adding hydrophobic fumed silica nanoparticles and fluorosilane into ethanol, and carrying out ultrasonic dispersion so as to prepare a superhydrophobic finish solution; and putting the cleaned fibrofelt in the primer resin solution, carrying out impregnation, then taking the fibrofelt out, removing excess resin and solvents through squeezing, carrying out drying, then subjecting the fibrofelt to dip-coating in the finish solution so as to form a superhydrophobic coating on the resin-treated fibrofelt, and then carrying out drying and curing so as to obtain the anti-fouling anti-moisture anti-mildew superhydrophobic fibrofelt.

The invention discloses transparent super-hydrophobic glass with anti-fog and dewdrop self-cleaning functions and a preparation method of the transparent super-hydrophobic glass. The preparation method comprises the steps of: performing high-temperature phase splitting treatment on sodium borosilicate glass to form an alkali-rich sodium-boron phase and a silicon-rich oxygen phase which are interpenetrated, then removing the alkali-rich sodium-boron phase through an acid etching process to reserve a high-silicon-content glass-phase porous three-dimensional network structure coating, and finallyreducing the surface energy through a fluorination process to obtain a transparent super-hydrophobic glass coating. The transparent super-hydrophobic glass with anti-fog and dewdrop self-cleaning functions and the preparation method of the transparent super-hydrophobic glass have the advantages of a simple process, easy operation, low requirements for equipment and low cost, and a new idea is provided for the preparation of transparent glass with a self-cleaning property.

The invention discloses a preparation method of plasma assisted super-hydrophobic polyester fabric. The preparation method comprises the following steps: carrying out dielectric barrier discharge atmospheric plasma modification treatment on polyester fabric after washing and drying; fully dipping the polyester fabric in pre-hydrolyzed fluorosilane finishing liquor, and squeezing; pre-baking and baking the polyester fabric through a baking oven, thus obtaining a final finished product. The polyester fabric prepared by the invention is wide in application, an atmospheric plasma technology is green and environment-friendly, the finished fabric is good in super-hydrophobicity, very good mechanical friction resistance and stability can be obtained, the operation is simple, and continuous industrial production can be easily realized.

The invention relates to the field of super-hydrophobic materials, and in particular, relates to a preparation method of high-flux super-hydrophobic wood, wherein the preparation method comprises the following steps: firstly, putting wood into a mixed solution of sodium hydroxide and sodium sulfite, heating at the temperature of 80-100 DEG C for 6-12 hours to remove part of hemicelluloses and lignin, putting the mixture into a hydrogen peroxide solution, and heating at the temperature of 80-100 DEG C for 0.5-2.5 hours to further remove lignin; and then, freezing the wood and carrying out freeze drying for 4-10 hours, then soaking the wood in a 2-20 wt% polydimethylsiloxane solution, taking out the wood and curing for 3-6 hours at the temperature of 60-100 DEG C, and thus obtaining the high-flux super-hydrophobic wood. The contact angle of water drops on the surface of the prepared super-hydrophobic wood can reach 156 degrees, the super-hydrophobic wood is of a vertically-arranged and large-aperture porous structure, high-flux oil-water separation can be rapidly carried out under the driving of gravity, and the separation flux can reach 7165 L*m<-2>*H<-1>; and compared with a traditional oil-water separation material, the wood has the advantages of being excellent in performance, easy to prepare, natural, renewable, low in application energy consumption and the like.

The present invention belongs to the field of polypropylene film or mass materials, especially relates to the rolling-angle controllable, super-hydrophobic, polypropylene film or mass and its preparation method. Solving polypropylene in solvent, and passing through processes of shearing, heat treatment, cooling, phase separation/crystallization, solidification, shaping, and drying at last, the films or masses with different morphological crystal networks are formed. With the minimum rolling ability on film or mass surface, water drops will roll, while the rolling angle is between 0 degree and 1 degree, and with the maximum rolling ability, the drops will not roll, while the rolling angle is 90 degree or 180 degree. The contact angle between film or mass surface and water is larger than 150 degree. The present invention achieves the control of super-hydrophobic property and rolling angle of general polyolefin resin film, without any later modification by low-surface-energy materials (containing fluoride materials or silane, etc.), and has good surface-structure stability, wind and rain resistance, and chemical corrosion resistance.

The invention belongs to the technical field of preparation of super-hydrophobic materials and in particular relates to a preparation method of a carbon-silver microsphere/epoxy resin super-hydrophobic coating. The preparation method comprises the steps of preparing flower-shaped carbon-silver microspheres, carrying out low-surface-energy modification, combining super-hydrophobic powder and a substrate and the like. The ending angle of each substrate covered with the super-hydrophobic powder on water is greater than 150 degrees and the rolling angle is less than 10 degrees. The combined super-hydrophobic substrate has very strong wear resistance, self-cleaning performance, pollution resistance, high temperature resistance and chemical stability. Meanwhile, even if a surface is forcedly damaged, the surface can also be repaired through sieving and scattering, spraying or dip coating again. The preparation method provided by the invention has the advantages of simple preparation technology, easiness for obtaining raw materials, no toxin and environmental protection, low cost and high stability; the carbon-silver microsphere/epoxy resin super-hydrophobic coating is suitable for large-area preparation and application, is suitable for fields such as industrial pipeline transportation under extremely bad working environments and is also suitable for fields including industrial pipeline transportation, preparation of oil-water separation metal nets and the like.

The invention belongs to the field of preparation of super-hydrophobic materials and in particular relates to a preparation method of super-hydrophobic powder based on flower-shaped iron-containing manganese dioxide and capable of being simultaneously used for emulsion separation and dye adsorption. The preparation method comprises the following steps: preparing the flower-shaped iron-containing manganese dioxide, carrying out low surface energy modification and treating emulsion and dye by utilizing super-hydrophobic powder and the like. The super-hydrophobic powder provided by the invention has good super-hydrophobic/super-oleophilic performance; a contact angle between the super-hydrophobic powder and water is greater than 150 degrees, a rolling angle is less than 10 degrees and a contact between the super-hydrophobic powder and oil is about 0 degree; the super-hydrophobic powder can be used for separation of oil-in-water emulsion and adsorption of toxic water-soluble dye. The preparation method of the super-hydrophobic powder, provided by the invention, has the advantages of simple preparation process, easiness of obtaining raw materials, no toxin and environment friendliness, low cost and strong stability and is suitable for large-area preparation and application; the super-hydrophobic powder is suitable for treating working oil-containing wastewater and a toxic dye polluted water body and is also applicable to the fields including transportation of an industrial pipeline, preparation of an oil-water separation metal net and the like.

The invention discloses a preparation method of a stable super-hydrophobic antibacterial cotton woven fabric based on glutaraldehyde cross-linking. The preparation method comprises the following stepsof step (1), cleaning and drying the cotton woven fabric; step (2), adding silver nitrate and tannic acid into a solvent, adjusting the pH value, performing ultrasonic treatment, adding the dried cotton woven fabric in step (1), stirring, taking out the cotton woven fabric after the reaction, and cleaning and drying; step (3), diluting glutaraldehyde, adding the dried cotton woven fabric in step(2), reacting, taking out the cotton woven fabric, and cleaning and drying; and step (4), dipping the dried cotton woven fabric in step (3) into a low surface energy substance for modification, and then cleaning and drying the cotton woven fabric to obtain the glutaraldehyde cross-linked stable super-hydrophobic antibacterial cotton woven fabric. The preparation method is simple and the antibacterial effect of the prepared product is stable; the low surface energy substance adopted by the invention is fluorine-free and non-toxic, and is skin-friendly; and after hydrophobic modification, stablesuper-hydrophobicity can be achieved.

The invention discloses a super-hydrophobic radiation cooling film and a preparation method thereof, and belongs to the technical field of functional cooling materials. The preparation method comprises the following steps: dissolving polyvinylidene fluoride and polydimethylsiloxane in a mixed solvent to form a polyvinylidene fluoride/polydimethylsiloxane composite solution by adopting a non-solvent induced phase separation method; dropwise adding a non-solvent to induce phase separation to form a phase separation sol solution; and casting the phase separation sol solution, and drying to obtain the super-hydrophobic radiation cooling film with the micro-nano double-order porous structure. The preparation method disclosed by the invention is simple, convenient and feasible in process and capable of realizing large-area production, and the super-hydrophobic radiation cooling film disclosed by the invention has high sunlight reflectivity, mid-red emissivity and self-cleaning performance, so that the purpose of radiation cooling is achieved, and the super-hydrophobic radiation cooling film is suitable for outdoor buildings, transportation tools, electronic products, human body heat management and the like. And certain significance is achieved for saving energy and relieving the greenhouse effect.

The invention discloses a magnetic super-hydrophobic hollow carbon microsphere as well as a preparation method and application thereof. The magnetic super-hydrophobic hollow carbon microsphere comprises a super-hydrophobic carbon shell layer with a hollow structure and magnetic nanoparticles coated in the super-hydrophobic carbon shell layer, the super-hydrophobic carbon shell layer is of a porousstructure, and the surface of the super-hydrophobic carbon shell layer is provided with multistage micro-nano surface protrusions. The content of the magnetic nanoparticles is 2-50wt%, and the content of the super-hydrophobic carbon shell layer is 50-98wt%. The magnetic nanoparticles are coated in the hollow carbon shell layer, so that the magnetic nanoparticles can be prevented from being in direct contact with the external environment, and the magnetic nanoparticles are prevented from reacting with acid, alkali and the like; and the magnetic super-hydrophobic hollow carbon microspheres areresistant to acid and alkali, high in salinity and stable in super-hydrophobicity and super-lipophilicity, the static water contact angle of the magnetic super-hydrophobic hollow carbon microspheres is larger than 150 degrees, and the oil contact angle of the magnetic super-hydrophobic hollow carbon microspheres is about 0 degree. The magnetic super-hydrophobic hollow carbon microsphere can be applied to the fields of oil-water separation and adsorption, self-cleaning antifouling, anti-icing, photo-thermal conversion and sea water desalination.

The invention discloses a method for preparing a super-hydrophobic functional surface of optical glass by hot press molding. The method comprises the following steps that a microstructure with micro-nano particles is processed on a silicon carbide surface of a hard alloy material through ultrafast laser, and low surface energy modification is carried out to obtain a microstructure mold with super-hydrophobic performance; then a super-hydrophobic mold prepared by an ultrafast laser processing method is used as a substrate, a microstructure optical element with micro-nano particles is pressed on the surface of the optical glass by adopting a hot press molding method through four processes of carrying out heating, carrying out profiling, carrying out cooling and carrying out annealing, and the optical glass element with the super-hydrophobic functional surface is prepared after low surface energy modification. The method has the advantages of being simple in preparation process, good in hydrophobic surface consistency, efficient, controllable and adjustable in processing, stable in super-hydrophobicity, good in optical performance, low in preparation cost, capable of manufacturing multi-scale optical glass super-hydrophobic functional surfaces with different functional structures on a large scale and the like.

The invention discloses fluoride-free durable super-hydrophobic cotton cloth and a preparation method and application thereof, and belongs to the field of super-hydrophobic materials. The preparationmethod comprises the following steps that hydrolysis reaction is carried out on 3-methacryloxypropyltrimethoxy silane and silicon dioxide to obtain modified silicon dioxide; secondly, cotton cloth fibers are modified by using 3-mercaptopropyltriethoxysilane, so that mercapto groups on the surfaces of the fibers are functionalized; and finally, under the action of a photoinitiator and illuminationof a mercury lamp, sulfydryl-alkene click chemical reaction is carried out on sulfhydrylation cotton cloth, methacryloyloxy polydimethylsiloxane and the modified silicon dioxide to prepare the super-hydrophobic cotton cloth. The super-hydrophobic cotton cloth prepared by the method has self-cleaning property and an oil-water separation function. Raw materials are cheap, easy to obtain and environmentally friendly, and the prepared material is stable in hydrophobicity and has good wear resistance. Meanwhile, the preparation method is simple, mild in preparation condition and convenient for large-scale production, and has huge industrial application potential.

The invention belongs to the technical field of materials, and provides a method for preparing super-hydrophobic surfaces of electrolytic copper matrixes. Micro-nano composite structures are formed onthe surfaces of the copper matrixes through an electrolyte in an electrochemical corrosion manner, and the surfaces have super-hydrophobicity, wherein according to machining parameters, the current density is 20 mA/cm<2>-150 mA/cm<2>, the electrolysis time is 3 min-7 min, and the distance between the two copper matrixes is 50 mm. The electrolyte used in the preparation process is low in cost andenvironmentally friendly, the preparation technology is simple and short in time, the prepared copper surfaces have high super-hydrophobicity, and the contact angle can reach 160 degrees. The super-hydrophobicity can be kept stable after the surfaces are placed under conventional conditions for a month.

The preparation method comprises the following steps: mixing a polydimethylsiloxane (PDMS) prepolymer A and a PDMS curing agent B to form a PDMS mixture, dropwise adding a certain amount of water under mechanical stirring, dispersing water molecules into fine liquid drops, wrapping the fine liquid drops with PDMS to form a PDMS-in-water emulsion, carrying out ultrasonic dispersion on the PDMS-in-water emulsion, and carrying out ultrasonic dispersion on the PDMS-in-water emulsion to obtain the super-hydrophobic radiation cooling porous film. The PDMS film containing water inside can be obtained after vacuum degassing, internal water is removed at high temperature, a micro-nano two-stage porous structure capable of enhancing Mie scattering is formed, and the radiation cooling film with the white matte appearance is prepared. And polishing with abrasive paper to remove the surface skin layer, thereby obtaining the super-hydrophobic radiation cooling porous film material with a rough structure on the surface. The thin film has high sunlight reflectivity, intermediate infrared emissivity and excellent self-cleaning performance, so that the purpose of long-term radiation cooling is achieved.