30results about How to "Hydrophobic stability" patented technology

The invention discloses a preparation method for a super-hydrophobic coating. The method comprises the following steps: mixing dodecafluoroheptyl methacrylate, methacrylic acid glycidol, azodiisobutyronitrile and sodium hydrogen sulfite, adding tetrahydrofuran, reacting under a heating state so as to form a reactant, and standing to acquire the super-hydrophobic coating; mixing nanometer silicon dioxide, ethyl alcohol and water and then ultrasonically dispersing, thereby forming a turbid solution; regulating the PH value of the turbid solution to 7, adding a coupling reagent into the turbid solution, condensing and back-flowing under heating and stirring state, thereby acquiring the modified silicon dioxide; performing suction filtration by using an ethyl alcohol solution, thereby acquiring purified amino modified silicon dioxide; drying and grinding, thereby acquiring amino modified nanometer silicon dioxide; dissolving the super-hydrophobic coating by using tetrahydrofuran and then adding triethylamine and amino modified nanometer silicon dioxide in turn, thereby forming a modified solution; soaking the substrate into the modified solution, taking out and then drying. The super-hydrophobic coating prepared according to the preparation method disclosed by the invention has stable and long-lasting super-hydrophobic property and is reusable.

The invention discloses a transparent antibacterial super-hydrophobic coating and a preparation method thereof. The transparent antibacterial super-hydrophobic coating consists of polystyrene nanospheres and PS-TiO2 structural composite particles, after the polystyrene nanospheres are etched by virtue of concentrated sulfuric acid, the polystyrene nanospheres are hydrolyzed and condensed with nanozinc oxide and tetrabutyl titanate to prepare the PS-TiO2 structural composite particles, and the surface of the PS-TiO2 structural composite particle is hydrophobized by virtue of octyltriethoxysilane, so that a transparent antibacterial super-hydrophobic coating is formed. The coating prepared by the invention is high in strength and high in hydrophobic capability, and the obtained super-hydrophobic surface is bacteria-free and excellent in stability.

The invention discloses a method for preparing a nepenthes bionic super-lubricating surface by using a laser etching method. The method comprises the following steps of 1) cutting, grinding and polishing an aluminum plate into a mirror surface, conducting ultrasonic cleaning for 15 min in deionized water, and drying at 80 DEG C for 30 minutes; (2) placing the aluminum plate on the lower surface of a nanosecond laser device to be etched, and moving a laser beam in a line-by-line scanning manner to irradiate in two vertical directions respectively to form a micron-sized square column array; 3) after laser etching, performing ultrasonic cleaning and drying, immersing the aluminum plate into a mixed solution of heptadecafluorodecyl triethoxysilane (PFDTES) and absolute ethyl alcohol in a volume ratio of 1: 100, standing at room temperature of 25 DEG C for 12 hours, washing with distilled water, and drying at 80 DEG C for 30 minutes; and (4) immersing the dried aluminum plate into perfluoropolyether lubricating oil at the inclination angle of 45 degrees and the speed of 3 mm / s, after the aluminum plate is completely immersed in the lubricating oil, horizontally standing for 30 minutes, taking out the aluminum plate, standing for 30 minutes at the inclination angle of 15 degrees with the horizontal plane, and then vertically placing the aluminum plate, and removing excessive lubricating oil to obtain the super-lubricating surface with excellent hydrophobicity and long-term effectiveness.

The invention discloses a preparation method of modified silicon dioxide obtained via super-hydrophobic modification. The preparation method comprises following steps: 1) a raw material A (a silicon dioxide base material, dry powder) is delivered into a mixer, a mixed state is maintained, a raw material C (a super-hydrophobic modification accessory ingredient prepared via mixing of 1.5% acetic acid aqueous solution and isopropanol at a mass ratio of 1-3:4-10) is atomized, and is sprayed into the mixed uniformly, and stirring is kept; 2) a raw material B (a hydrophobic modification agent organic silane coupling agent) is atomized, and is sprayed into the mixer uniformly, and stirring is kept; 3) aging is carried out; and 4) ultrafine grinding is carried out so as to obtain a finished product. Fewer processing steps are needed; energy consumption is low; requirements of industrialized large-scale production can be satisfied; particle size distribution of the modified silicon dioxide obtained via super-hydrophobic modification is uniform; pore structures are stable; and hydrophobic performance is stable. The prepared super-hydrophobic silicon dioxide prepared via the preparation method is taken as a flatting agent, and can be used for providing paint with super hydrophobic performance; film forming coating particle arrangement is uniform; and luster is soft.

The invention relates to the technical field of road surface deicing and particularly discloses biological anti-freezing protein water-based emulsion for preventing icy pavement as well as a preparation method thereof. The emulsion is prepared from the following raw materials in parts by mass: 3.2 to 12.8 parts of biological anti-freezing protein, 45 to 75 parts of water, 0.2 to 0.8 part of cationic emulsifier, 1 to 4 parts of butyronitrile rubber latex, 4 to 11 parts of calcium octadecate and 0.175 to 0.555 part of inorganic acid. According to the emulsion provided by the invention, the components are cheap, the production process is simple, the deicing effect is obvious, occurrence of icing is completely inhibited at -2 to 0 DEG C and the icing occurrence rate is 15 percent or below at -4 to -2 DEG C; furthermore, the size of ice crystals can be effectively reduced, and great popularization and application value is achieved in road icing regions in winter.

The invention provides a high-weather-resistance rock wool product for external thermal insulation of a building external wall and a preparation method of the high-weather-resistance rock wool product. The high-weather-resistance rock wool product is prepared by spraying a composite adhesive aqueous solution on rock wool fibers, the composite adhesive aqueous solution comprises phenolic resin which can be polymerized and cured at 180-250 DEG C, and sodium methyl silicate and / or potassium methyl silicate; on the basis of the dry weight of the rock wool product, 0.8-1.2% of phenolic resin solids and 0.08-0.15% of sodium methyl silicate and / or potassium methyl silicate are coated; according to the prepared rock wool board, the rock wool fibers are stable in strength and water and moisture absorption capacity, the water and moisture absorption capacity is low, the index requirements of GB / T 25975-2018 are met, and the long-term performance, especially the weather resistance, of the rock wool board is guaranteed.

The invention provides a preparation method of a durable hydrophobic fabric. The preparation method of the durable hydrophobic fabric comprises the steps of, firstly, preparing hydrophobic cross-linked polystyrene microspheres; secondly, performing surface modification on the prepared hydrophobic cross-linked polystyrene microspheres to form reaction-active -NCO functional groups on the surface of the hydrophobic cross-linked polystyrene microspheres; thirdly, grafting the modified hydrophobic cross-linked polystyrene microspheres onto the surface of a fabric to obtain the durable hydrophobic fabric. The prepared hydrophobic cross-linked polystyrene microspheres are stable in performance, simple in technical processes, low in raw material cost and easy to produce; by structuring a hydrophobic structure on the surface of the fabric through the surface-modified hydrophobic cross-linked polystyrene microspheres, significant hydrophobic effects can be achieved and maintained for a relatively long term; the processing temperature is mild and can effectively reduce influence on the original performance of the fabric; through a chemical bonding mode, the surface-modified hydrophobic cross-linked polystyrene microspheres are grafted to the surface of the fabric, so that the fabric can keep good hydrophobic effects after being washed for a number of times.

The invention relates to a method for preparing a super-hydrophobic coating on a steel base by Fe-based nanocomposite brush plating, which belongs to the method for preparing a super-hydrophobic coating on a steel base. Nano-composite brush iron plating process to prepare super-hydrophobic coating on the surface of steel substrate, using nano-composite brush iron plating process and coating blackening treatment, to prepare super-hydrophobic coating with contact angle greater than 150° and rolling angle less than 3° on the surface of steel substrate , consists of the following steps: (1) preparatory work; (2) the process flow of preparing micro-nano rough structure on the steel surface by nano-composite brush iron plating; Al 2 o 3 Composite coating → lye soaking, rinse with water after each step of the process to prevent the plating solution from polluting the next process; blacken the coating; (4) modify the rough surface with low surface energy substances. Advantages: Brush iron plating on the hard metal surface and then blacken it to construct a super-hydrophobic surface, which has the advantages of light equipment, simple process, low cost, and strong bonding force of the coating.

The invention discloses a preparation method of a photocuring type superhydrophobic composite film. The composite film comprises an elastic substrate and a surface superhydrophobic layer. The preparation method comprises the following steps: firstly, preparing the elastic substrate: uniformly mixing a photoinitiator with a prepolymer, and carrying out ultraviolet irradiation on an obtained mixture to obtain a precured elastic substrate; secondly, preparing turbid liquid: uniformly dispersing a polymer with low surface energy, the photoinitiator, a cross-linking agent and micro and / or nano hydrophobic particles in a solvent to obtain the turbid liquid; thirdly, preparing the superhydrophobic composite film: coating the elastic substrate with the turbid liquid, and then carrying out ultraviolet irradiation curing treatment to obtain the composite film with superhydrophobicity. According to the superhydrophobic composite film prepared by the preparation method disclosed by the invention, the elastic substrate and the superhydrophobic layer are integrated by chemical crosslinking; the uperhydrophobic composite film has the advantages of simple preparation process, good friction resistance and tensile resistance, stable superhydrophobic effect and the like; the coating is not easy to fall off.

The invention discloses polyurethane foam and a preparation method and application thereof, and the purpose is to solve the problems of poor hydrophobic performance of the existing polyurethane foam. The polyurethane foam includes isocyanate, hydroxyl terminated liquid rubber, a catalyst, a foaming agent, a foam stabilizer, a hole opening agent, a flame retardant, fatty amine and the like. Through use of low surface energy and high hydrophobic performance of the fatty amine and reaction performance of nitrile group (-CN) and epoxy group (-CH (O) CH-), the fatty amine is introduced into the nitrile group or epoxy group-containing hydroxyl terminated liquid rubber and nitrile group or epoxy group-containing carboxyl terminated liquid rubber, and by reaction with the isocyanate, the super hydrophobic polyurethane foam is prepared. When the super hydrophobic polyurethane foam absorbs oil-water mixtures, or oil and liquid organic matters leaking onto the water surface, only oil and liquid organic matters are absorbed, no water is absorbed, so that recovery of leaked oil and liquid organic matters and water purification can be realized.

The invention belongs to the field of hydrophobic materials, and discloses a hydrophobic powder material and a preparation method thereof. Under the condition of cutting off oxygen, an unsaturated fatty acid containing at least two conjugated unsaturated bonds is used as a hydrophobic agent to combine soil with the hydrophobic agent. Mix and heat to obtain hydrophobic dispersion material. In the present invention, under the condition of isolating oxygen, the hydrophobic agent undergoes thermal polymerization reaction after heating, and the dry oil viscosity of the hydrophobic agent after anaerobic thermal polymerization is high, and it is in a semi-solid-solid state, and can be successfully attached to the surface of soil particles , forming a hydrophobic film, thereby obtaining a hydrophobic dispersion material with stable hydrophobic properties and high hydrophobic properties. In addition, the amount of hydrophobic agent used in the present invention is small, and the source is extensive, low in cost, high in cost performance, degradable, can be naturally degraded after use, and has no biological toxicity, and will not increase the content of heavy metals at the same time, and is environmentally friendly. The prospects are broad.

The invention discloses a method for realizing weak surface hydrophobicity (HC6) for an alternating-current (AC) composite insulator. According to the method, diatomite and kaolin are mixed according to a certain ratio and then are coated on the surface of the insulator, and the weak surface hydrophobicity for the composite insulator is realized after a certain migration time. By using the method, the voltage of the AC composite insulator is higher than that of flashover under hydrophilic conditions and is far lower than that of the flashover under strong hydrophobic conditions, and the situation that the hydrophobicity of the composite insulator of an AC transmission line during operation is lowered is better simulated. Thus, AC composite insulator contamination tests are carried out by using the method, and obtained results are applied to the design of external insulation of a power transmission line, so that the construction cost of the power transmission line can be reduced while the reliability of the external insulation of the power transmission line is guaranteed.

The invention provides a method for preparing a polymer superhydrophobic surface by a CaCO3 template method, comprising the following steps of: firstly adhering a thin CaCO3 layer with the thickness of 0.1 to 20mm and the particles of 800 to 3000 meshes on a plane or a roll surface base; then hot pressing a polymer on the thin CaCO3 layer, and after peeling off a composite layer, and finally immersing the polymer in an acid liquor to corrode the calcium carbonate particles on the surface of the polymer, thus obtaining the polymer superhydrophobic surface with irregular network structure. The invention mainly has the following beneficial effects that the method has simple operation technology, low cost, high efficiency, and good controllability and repeatability, furthermore, the method iseasy for large-area preparation, and provides a simple and effective way for the industrialization of the superhydrophobic surface, thus having wide application value and broad market prospect.