64results about How to "Achieve superhydrophobic effect" patented technology

The invention provides a modification method of a ceramic membrane and a modified ceramic membrane. The modification method of the ceramic membrane comprises the following steps: performing surface treatment on the ceramic membrane to obtain a fresh ceramic membrane; coating the surface of the ceramic membrane with a silane compound through an impregnation method or a sedimentation method; performing thermal treatment on the coated ceramic membrane under a protective atmosphere, naturally cooling to obtain the modified ceramic membrane after the modification. The modification method of the ceramic membrane provided by the invention has advantages that the modification process is simple, the raw material cost is low, and secondary pollution on the environment can be avoided in the modification process; compared with the common organic modification material, the modified ceramic membrane prepared through modification has the features of high long-term stability, strong acid-base resistance, and strong hydrophobic property; and the modified ceramic membrane can be extensively applied to sea water desalinization, oil-water separation, wastewater treatment and other fields.

The invention discloses a method for preparing good-stability super-hydrophobic fabrics, which comprises the following steps: dispersing organosilane polymers into an organic solvent so as to obtain 2-50 mg/mL of an organosilane polymer solution; coating the organosilane polymer solution on the surface of a fabric in a dip-coating or spray-coating mode; and carrying out curing processing on the fabric in an ultrasonic and/or heat treatment mode so as to obtain a super-hydrophobic fabric. The super-hydrophobic fabric prepared by using the method disclosed by the invention is excellent in super-hydrophobicity and hydrophobic stability, and keeps the natural mechanical properties and luster and the like of fabrics, therefore, the fabric has wide application in the fields of self-cleaning fibers and fabrics. In addition, the method disclosed by the invention is simple in preparation process, mild in reaction conditions, low in cost, and convenient for mass production.

The invention relates to a making method of a fabric, in particular to a making method of a single-face-super-hydrophobic and single-face-hydrophilic Janus-type fabric and belongs to the field of textile function arrangement. The method comprises the following steps that 1, the fabric is cleaned and then dried for use; 2, the single face of the fabric is protected, under the condition of constantoxygen pressure intensity, plasma glow discharge treatment is conducted on the single face of the fabric, after oxygen is switched off, under the condition of constant steam pressure intensity of a grafting monomer, plasma glow discharge treatment is conducted again, and the single-face-super-hydrophobic and single-face-hydrophilic Janus-type fabric is obtained. According to plasma glow dischargetreatment, a cold plasma treatment instrument is used for generating plasma glow, the plasma treatment power is within 30-120 W, and the time is within 1-10 min. According to the method, the technology is simple and easy to control, the method is suitable for single-face treatment of various cotton fabrics and acetate fiber non-woven fabrics, the functionality demand is met, and the method also has good wearing performance.

The invention relates to a super-hydrophobic antibacterial finishing agent for cotton fabrics. The super-hydrophobic antibacterial finishing agent comprises following components: long-chain alkyl alkoxy siloxane, nano zinc oxide and silane behenyl trimethyl ammonium chloride used as an emulsifier antibacterial agent. Long-chain alkyl alkoxy siloxane and nano zinc oxide are used as super-hydrophobic raw materials and silane behenyl trimethyl ammonium chloride is used as the emulsifier antibacterial agent to prepare the super-hydrophobic antibacterial finishing agent for fabrics, particularly the cotton fabrics; water is used as a dispersion medium so that the disadvantage of existing patented technologies at home and abroad that an organic solvent is taken as a carrier to prepare the super-hydrophobic fabrics is overcome; the contact angle between the cotton fabrics treated by the super-hydrophobic antibacterial finishing agent and water drops is larger than 150 degrees and the super-hydrophobic effect of a lotus leaf is realized; the water drops roll on the surfaces of the cotton fabrics and are not absorbed by the cotton fabrics for long time; meanwhile, the super-hydrophobic antibacterial finishing agent has good antibacterial and mould-proof functions.

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 discloses a preparation method for a fluoride-free super-hydrophobic cotton fabric, and belongs to the field of textile function finishing and processing. The preparation method comprises the steps that rolling-drying-baking finishing is performed on a cotton fabric by adopting nano titanium dioxide sol to improve the roughness of the surface of the fabric, and then hydrophobic modification is performed on the fabric by adopting a low-surface-energy substance-molten wax substance; the contact angle of the prepared cotton fabric and a water drop is larger than 150 degrees. According to the method, through a chemical reaction between hydroxyl of cotton fiber and hydroxyl in the nano TiO2 hydrosol, the constructed rough surface has the good firmness; through the structural characteristics of the bionic lotus leaf surface, the molten wax substance is adopted to be cured and crystallized on the rough surface of an oxide for organic modification, not only can the super-hydrophobic effect can achieved, but also the influences of introducing a fluorine-containing organic modifier and other organic solvent or a surfactant on the hydrophobicity of the fabric can be avoided, and therefore the super hydrophobicity of the prepared fabric has the excellent stability.

The invention discloses a fluorine-free super-hydrophobic Zn-MOF composite coating on the surface of a magnesium alloy and a preparation method thereof. The fluoride-free super-hydrophobic Zn-MOF composite coating on the surface of the magnesium alloy specifically comprises a micro-arc oxidation layer, a Zn-MOF layer and a stearic acid layer which are sequentially attached to the surface of the magnesium alloy. A magnesium alloy matrix is sequentially subjected to grinding and polishing, oil removal and ultrasonic cleaning, then micro-arc oxidation treatment is carried out, after a micro-arc oxidation film is formed on the surface of the magnesium alloy matrix, the micro-arc oxidation film is placed in a polytetrafluoroethylene reaction kettle for high-temperature and high-pressure reaction to form the Zn-MOF coating, and finally the Zn-MOF coating is treated with a low-surface-energy substance stearic acid, and the fluorine-free super-hydrophobic Zn-MOF composite coating on the surface of the magnesium alloy is obtained after drying. The method is simple in preparation process and free of fluorine, the composite coating and a magnesium alloy base material have good binding force,the composite coating can be evenly distributed on the surface of the magnesium alloy, the corrosion current density is low, the super-hydrophobic effect is achieved, and good corrosion resistance isshown.

The invention provides a boron-doped diamond film and a preparation method thereof, an oil-water separation element, a water treatment electrode and a preparation method thereof and a water treatmentdevice, and relates to the technical field of diamond films. The boron-doped diamond film comprise a boron-doped diamond micrometer layer and a boron-doped diamond nanometer layer; the surface of theboron-doped diamond micrometer layer is provided with convex micrometer particles; the boron-doped diamond nanometer layer is formed on the surface of the boron-doped diamond micrometer layer, and thesurface of the boron-doped diamond nanometer layer is provided with nanometer particles; and the boron-doped diamond micrometer layer and the boron-doped diamond nanometer layer form a lotus leaf-like multilevel micro-nano structure. The boron-doped diamond film has the lotus leaf-like multilevel micro-nano structure, a bionic superhydrophobic surface is formed, the filtering function and the electrocatalytic water purification function are taken into account concurrently, and a foundation is laid for development of a new-generation field living water supply system.

The invention belongs to the field of material surface and inorganic porous material and specifically relates to a superhydrophobic coating and its preparation method. The preparation method comprises the following steps: a, adding 1-5 parts by weight of natural zeolite into 50-100 parts by weight of ethanol, carrying out ultrasonic dispersion for 10-30 min, adding 0.15-0.85 part by weight of perfluorodecyltrichlorosilane, and continuously carrying out ultrasonic dispersion for 10-30 min to obtain a dispersion liquid; b, immersing a base material into the dispersion liquid obtained in the step a for 3-5 min, taking out the base material and drying the base material at 50-70 DEG C for more than 30 min; and c, repeating the step b for two to three times so as to form the superhydrophobic coating on the surface of the base material. Natural zeolite belongs to an inorganic porous material and is easy to form a micro-nano structure in the coating. Meanwhile, there exist many hydroxide radicals on the surface of zeolite, and its surface energy is reduced after condensation between perfluorodecyltrichlorosilane and hydroxide radicals. Thus, the superhydrophobic effect is achieved. The natural zeolite is cheap and easily available. The preparation method is simple and easy for industrialization. The coating of the invention has a self-cleaning ability, is applicable to many base materials and is widely applied.

The invention discloses a preparation method of a sanitary ware with a super-hydrophobicity surface, belonging to the field of surface modification of high polymer materials and polymer-based sanitary ware article materials. The invention comprises the following steps of firstly preparing a plastic plate with a certain size by using ultra high molecular weight polyethylene materials through press forming or extrusion forming, then carrying out heating treatment on the ultra high molecular weight polyethylene plate, carrying out vacuum suction moulding under the temperature of about 120 DEG C, and carrying out wind cooling shaping so as to enable the ultra high molecular weight polyethylene plate to become a household sanitary ware plastic panel. The sanitary ware panel after forming is treated three times by fast surface etching treatment by using hot solution including xylene through a physical method, and therefore, the material surface has larger static contact angle and also a smaller rolling angle so as to enable the sanitary ware material surface to display the effect of a water drop dripping on a lotus leaf, and the invention becomes the sanitary ware article materials with the super-hydrophobicity surface.

The invention discloses a production technology of hydrophobic bamboo wood with the surface being loaded with oxidized graphene and silicon dioxide, and relates to the technical field of composite materials. The production technology includes the following steps that S1, absolute ethyl alcohol, deionized water and ammonia water are collected to be poured into a beaker for stirring, so that a soak solution is prepared, and TEOS is added into the soak solution to obtain colloid; S2, the bamboo wood loaded with the oxidized graphene and the colloid in the step S1 are transferred into a reaction still to carry out a hydrothermal reaction; S3, after the hydrothermal reaction is completed, a bamboo block is taken out and cleaned with the deionized water, and then the bamboo block is put into a vacuum drying oven to be dried; S4, heptadecafluorodecyl trimethoxy-silane and methyl alcohol are mixed to be evenly stirred, so that mixed liquor is formed; S5, the bamboo block dried in the step S3 is put into the mixed liquor of the step S4 to be stirred; and S6, after stirring is completed, the bamboo block is taken out and is washed with the methyl alcohol, and then the bamboo block is put into the vacuum drying oven to be dried so that a product can be prepared. By the adoption of the production technology, the technical problem that bamboo wood prepared in the prior art cannot meet the hydrophobic requirement is solved.

The invention discloses a diamond thin film of a multi-level micro-nano structure and a preparation method and application thereof and relates to the technical field of diamond thin films. The diamondthin film comprises a discontinued micron-sized diamond island which is formed from the surface of a substrate to the exterior in sequence and the multi-level micro-nano structure which is similar tothe mastoid process of the lotus leaf and is formed by a nano diamond film layer composed of continuous nano-sized diamond grains. The preparation method of the diamond thin film comprises the following steps that first, low-density crystal implantation is performed on the substrate, and primary growth of diamond is performed through a heat wire chemical vapor deposition method; and then, high-density crystal implantation is performed on the primary growth diamond thin film, and secondary growth of diamond is performed through the heat wire chemical vapor deposition method. The diamond thin film is of the multi-level micro-nano structure similar to the mastoid process of the lotus leaf, forms a bionic super-hydrophobic surface, and is high in hydrophobicity and self-cleaning capacity, resistant to corrosion and long in service life. The preparation method is easy to implement, high in applicability and suitable for industrial production and has a simple and stable process.

The invention relates to super-hydrophobic modification of nanocellulose, and provides a super-hydrophobic modification method of nanocellulose. The method comprises the following steps: preparing nanocellulose with different carboxyl contents by utilizing a method of combining a TEMPO/NaClO/NaBr oxidation system and ultrasonic oscillation, and selecting octadecylamine with low surface energy as a hydrophobic modifier, wherein a hydrophobic long chain can be grafted on the surface of the nanocellulose by carboxyl in the nanocellulose and amino in the octadecylamine through complexation reaction; and selecting an adhesive substance polydopamine, and coating the surface of the modified nanofiber with the selected substrate, so that not only can an octadecylamine long chain grafted with the nanocellulose be protected, but also free octadecylamine in a system can be adsorbed on the surface of the nanocellulose. The prepared hydrophobic nano cellulose film is applied to the fields of oil-water separation, waterproof films and the like.

The invention relates to a method for preparing a sprayable super-hydrophobic coating with heat storage capacity. According to the method, mesoporous crosslinked polystyrene nanotubes and fluorated silicon dioxide pellets are dispersed into the volatile solvent dissolved with a tackiness agent and a phase-change material, and a blended spinning solution is sprayed onto a substrate material with aone-step method. By adoption of the method, the super-hydrophobic energy storage coating is prepared through the one-step spraying method, and the process of preparing composite phase-change materialsis omitted; and moreover, the heat storage capacity and super-hydrophobic performance are excellent, and a new road is opened up for practical preparation applications of the super-hydrophobic energystorage coating.

The invention provides an acrylamide nano coating and a preparation method thereof. The acrylamide nano coating is characterized in that a substrate is exposed in a monomer steam atmosphere, and a chemical reaction is formed on the surface of the substrate through plasma discharge to form a protective coating; monomer steam is vaporizable monomer 1 or monomer 2, or a mixture of the monomer 1 and monomer 2. Through adoption of the method provided by the invention, a denser and more exquisite micro-convex structure is formed on the surface of the substrate, so that the coating with nano size hasexcellent acid and alkali resistance, corrosion resistance and a super-hydrophobic effect, and a contact angle can reach 150 degrees or above.

The invention discloses a super-hydrophobic heat-resistant coating for an aluminum alloy and a preparation method of the super-hydrophobic heat-resistant coating, and relates to the technical field of coatings. The heat-resistant coating is formed on the surface of the aluminum alloy through the spraying pretreatment process and the second-time spraying treatment in sequence, the heat-resistant coating and the aluminum alloy form a firm cross-linked interpenetrating network structure, the heat resistance of the coating is improved, and the phenomenon that the service life of the aluminum alloy is shortened in a high-temperature environment is reduced; and then third spraying treatment is conducted, a corrosion inhibitor serves as an inner core solution, stearic acid serves as a shell solution, a super-hydrophobic coating is formed through coaxial electrostatic spraying, the corrosion inhibitor is prepared from isoquinocarboxylic acid, dipropylene triamine and p-methoxyphenyl thiourea, the surface of the aluminum alloy is isolated from an environment medium, and corrosion of an acid medium and chloride ions is inhibited. The prepared super-hydrophobic heat-resistant coating for the aluminum alloy has the heat-resistant, super-hydrophobic and corrosion-resistant effects.

The invention relates to a preparation method of a flexible fluoride-free super-hydrophobic coating with photothermal conversion and heat storage functions. According to the method, polydimethylsiloxane is introduced as an adhesive, the adhesive and a phase change material are dissolved in a solvent, then carbon-doped mesoporous silica nanotubes are dispersed in the system, and finally a blended solution is sprayed on a substrate in a spraying manner, so that the flexible fluorine-free super-hydrophobic coating with photothermal conversion and heat storage functions is obtained. The process of preparing a composite phase change material and hydrophobic modification is omitted, and the coating not only has excellent photothermal conversion capacity, but also has good flexibility and excellent super-hydrophobic performance, is simple to construct and low in preparation cost, and has huge practical application value.

The invention discloses a preparation method of a super-hydrophobic anticorrosive self-assembled three-dimensional nano material. The method comprises the following steps: firstly, preparing dahlia-like carbon nanohorns by adopting an electric arc discharge method, and performing transient oxidation treatment on the carbon nanohorns to obtain an open-cell carbon nanohorn material; and fully mixingnano zinc ethanol slurry and the carbon nanohorn material, and performing self-assembly compounding on the carbon nanohorns and nano zinc by adopting a supercritical fluid method to form the three-dimensional pearl mussel-like structural material. According to the preparation method provided by the invention, the carbon nanohorn-nano zinc composite material prepared by adopting the method has a simple process, synergy of a super-hydrophobic structure of the carbon nanohorns and corrosion resistance of the nano zinc in the coating system can physically block a reaction of a metal surface withan active medium, and effectively protect elemental zinc against corrosion by a liquid and oxidation by the air, thereby greatly improving a zinc utilization rate and corrosion resistant efficiency; and the composite material can be widely used in the fields of architectural coatings and industrial anticorrosive coatings to improve compactness, barrier properties, mechanical properties and corrosion resistance of films.

The invention provides a light-cured coating, an ultraviolet light-cured hydrophobic anti-adhesion film surface and a preparation method thereof. The light-cured coating comprises the following components in parts by weight: 15-30 parts of polyurethane acrylate, 10-30 parts of nano Particles, 2-4 parts of photoinitiator, 1-15 parts of perfluoropolyether, 5-15 parts of perfluoro-modified long-chain alkylsilane and 30-50 parts of solvent. The invention uses polyurethane acrylate, perfluoropolyether and perfluoromodified long-chain alkyl silane to compound nanoparticles, so that the photocurable coating is crosslinked through photocuring reaction to form a tight coating, which has wear resistance and forms a cured coating. The super-hydrophobic microstructure of the substance enhances its hydrophobicity. Through the microstructure formation and ultraviolet curing methods, a concave-convex microstructure is produced on the surface of the prepared film, which produces a lotus leaf effect, enhances hydrophobicity, and achieves superhydrophobicity. Production Afterwards, it can be rolled directly without the need for a protective film, saving costs.