51results about How to "Achieving superhydrophobicity" patented technology

The invention discloses a super-hydrophobic conformal coating, and a preparation method and an application method thereof. The super-hydrophobic conformal coating is composed of, by mass, 5 to 40% of fluorocarbon resin, 10 to 30% of fluorosilicon resin, 20 to 60% of an organic solvent, 10 to 30% of silica, 1 to 10% of titanium dioxide, 1 to 10% of polytetrafluoroethylene, 0.1 to 0.5% of a catalyst, and 1 to 5% of a curing agent. According to the preparation method, the ingredients are subjected to stirring mixing and ultrasonic uniform dispersion in sequence at a certain ratio. According to the application method, the super-hydrophobic conformal coating is subjected to direct spraying or brush coating onto the surfaces of insulators and outdoor electric power facilities; the thickness of obtained coating layers is controlled to be 0.1 to 0.5mm preferably; and 20 to 60min of normal temperature curing is needed. The preparation method is simple; the cost is low; the super-hydrophobic conformal coating is convenient to use, possesses extremely high hydrophobicity and weatherability, is capable of realizing self cleaning, is a nanometer composite hybrid normal-temperature cured fluorocarbon coating, is capable of realizing stain prevention, pollution flashover prevention, and corrosion prevention of insulators and outdoor electric power facilities effectively, and is promising in application prospect.

The invention provides a preparation method for transparent super hydrophobic polymer thin films; the transparent polymer thin films are prepared by tape casting or directional stretching and other molding processes, a special structure of nano mastoids and grooves is formed on the surface of the polymer thin films by a supercritical CO2 foaming method, and super hydrophobicity and low reflection are achieved while the transparency is kept. The method is suitable for various thermoplastic polymer thin films, and all the thermoplastic transparent polymer thin films with various thickness and areas can be made to have super hydrophobic surfaces by the method. By adjusting supercritical CO2 foaming technological conditions including the temperature, the pressure, the soaking time and the pressure relief rate, and with utilization of a covering object to limit the gas diffusion rate of the thin film surface, the nano structure (the nano mastoid size, the groove depth and width and the like) of the thin film surface can be adjusted conveniently, and thus the super hydrophobicity is achieved while the transparency of the polymer thin films is kept.

The invention relates to a preparation method of super-hydrophobic-hydrophilic wood with intelligent temperature response and belongs to the field of super-hydrophobic wood. The super-hydrophobic wood prepared by the method has the hydrophilic reversible characteristic which is not owned by the previous super-hydrophilic wood. A contact angle between the super-hydrophobic wood and water is greater than 150 degrees; a rolling angle is smaller than 10 degrees; the super-hydrophobic-hydrophilic wood is excellent in super-hydrophobic performance and good in self-cleaning performance. The preparation method of the super-hydrophobic-hydrophilic wood with the intelligent temperature response comprises the following steps: soaking the wood in a silicon dioxide aqueous solution, drying, then uniformly and dropwise coating the surface of the wood with polycaprolactone dissolved in a mixed solution of methyl alcohol and chloroform, and finally drying in vacuum. The wood shows the intelligent temperature response in the cross section. The method is simple in process, low in cost, short in period, low in energy consumption and free of special complicated equipment; the prepared super-hydrophobic-hydrophilic wood with the intelligent temperature response is capable of converting the wettability for hundreds of times under high and low temperatures; the prepared super-hydrophobic-hydrophilic wood has a great application prospect in the future.

The invention discloses a method for preparing a super hydrophobic coating on copper or a copper alloy net without surface modification. A precious metal nanometer coating is plated on the copper or the copper alloy net by adopting a chemical plating method, the coating is not needed to be modified by substance with low surface energy, and the coating is converted into a super hydrophobic coating after being placed in air for a certain period of time. According to the method adopted by the invention, the technology is simple, the operation is easy, the repeatability is good, and the method is applicable to the large-scale production of the super hydrophobic coating.

The invention provides a super-hydrophobic coating as well as a preparation method and application thereof. The coating can be smeared on the surfaces of flexible or rigid materials, can also be smeared on flat or rough substrates made of plastics, metals and the like, can realize the functions of self-cleaning, water resistance, freezing resistance, fog resistance, fluid resistance reduction and corrosion resistance, and can be widely applied to the fields of buildings, household appliances, traffic transportation, clothing, electronic devices, liquid transportation and the like.

The invention discloses a superhydrophobic coating containing hollow glass beads and a preparation method thereof. The method is characterized by comprising the steps of: (1) modifying hollow glass beads with a silane coupling agent to realize the hydrophobic performance of the hollow glass beads; (2) preparing a polyurethane solution and a polyvinylidene fluoride solution of different concentrations, and stirring the polyvinylidene fluoride solution and the polyurethane solution uniformly according to certain mass ratio to obtain a polymer solution A; (3) adding the modified hollow glass beads into the polymer solution A according to a proper mass ratio, adding a defoamer and performing stirring for 1-2h at room temperature to obtain a superhydrophobic coating solution; and (4) conductingbrush coating of the superhydrophobic coating solution on a substrate surface, and performing drying at 50-70DEG C to obtain the hollow glass bead superhydrophobic coating. The method provided by theinvention has the characteristics of simple preparation process and low cost, and can achieve large-scale application.

The invention discloses a preparation method of a super-hydrophobic stainless steel mesh nano-aluminum thin film. The preparation method comprises the following steps: a, grinding a stainless steel mesh by using abrasive paper so as to remove an oxide layer on the surface, subsequently feeding the stainless steel mesh into acetone, absolute ethyl alcohol and deionized water in sequence, carrying out ultrasonic oscillation cleaning to remove impurities on the surface, and then carrying out air drying for later use; b, preparing stable suspension; (the intermediate steps are omitted); f, takingout the stainless steel mesh treated in the step e, then leaching with the absolute ethyl alcohol, and putting the stainless steel mesh into a drying oven for drying to obtain the super-hydrophobic stainless steel mesh nano-aluminum thin film. According to the preparation method of the super-hydrophobic stainless steel mesh nano-aluminum thin film, disclosed by the invention, a contact angle of the obtained super-hydrophobic stainless steel mesh nano-aluminum thin film is as high as 155 to 165 degrees, and a rolling angle is smaller than 10 degrees. In addition, in the preparation process of the super-hydrophobic stainless steel mesh nano-aluminum thin film, simple required equipment, efficient deposition, low cost and uniform film layer are realized; a large amount of precious metals, strong acid and strong base are avoided, so that the cost and the risk of preparation are reduced.

The invention relates to a bio-based super-hydrophobic coating and a preparation method and an application method thereof, the bio-based super-hydrophobic coating comprises a primer and a top coating,and the top coating is prepared from resin B, lotus leaf particles, a pigment, a thickener, an acid-base regulator and the like. According to the bio-based super-hydrophobic coating as well as the preparation method and the application method thereof, the resin B is used as a matrix, the lotus leaf particles belonging to pure organisms are crushed and ground through a specific process, a nano-micron dual structure of lotus leaves is reserved, and the lotus leaf particles are added into an environment-friendly coating matched with the the lotus leaf particles. The primer is firstly coated or sprayed on a surface to be hydrophobic to ensure adhesion, reduction of surface energy and adhesion of the coating due to addition of e thlotus leaf particles is avoided, then the top coating is coatedor sprayed on the surface to be hydrophobic, the water contact angle after coating is larger than 150 degrees, the synthesis process is simple, the cost is low, and the coating is green, environmentally friendly, safe and pollution-free and can be produced in batches. The super-hydrophobic self-cleaning coating can be widely applied to the surfaces of wall surfaces, cement, metal, glass and the like to realize super-hydrophobicity and self-cleaning.

A preparation method of the super-hydrophobic perovskite/silicon dioxide composite light-emitting film comprises the following steps: firstly, uniformly dispersing PbBr2 and alkali liquor in an alcohol solvent to obtain a Pb-based dispersion liquid, uniformly dissolving Cs2CO3 and TEOS in the alcohol solvent to obtain a CsSi-based dispersion liquid, dropwise adding the Cs-Si-based dispersion liquid into the Pb-based dispersion liquid under a stirring condition, and after sufficient reaction for a certain period of time, adding hexamethyldisilazane for modification reaction, coating the obtained dispersion liquid with a film and dried, so that the super-hydrophobic perovskite/silicon dioxide composite light-emitting film with high efficiency and high stability is obtained. The preparation method provided by the invention is simple and easy to implement, mild in reaction condition and low in cost, macro preparation can be realized, and the obtained perovskite/silicon dioxide composite material can show good super-hydrophobic function and stability, and has a wide application prospect in the fields of self-cleaning, efficient and high-stability LEDs or fluorescent solar light collectors and the like.

The invention discloses a super-hydrophobic digital micro-fluidic chip based on an anodic oxidation method, a manufacturing method thereof, and a liquid drop control system, and relates to the field of biochemical detection micro-fluidic chips. The problems that an existing hydrophobic digital micro-fluidic chip is complex in preparation mode and high in manufacturing cost, and liquid drops can be controlled to move only by high driving voltage are solved. The top surface of a first substrate of the super-hydrophobic digital micro-fluidic chip is covered with a plurality of electrode plates, the plurality of electrode plates are distributed on the top surface of the first substrate in an array manner, the plate body of the first substrate is provided with a plurality of through holes, and the plurality of through holes are in one-to-one correspondence with the electrode slices; a plurality of wires are distributed on the bottom surface of the first substrate, and each wire is connected with one through hole; each lead is electrically connected with one electrode plate through a via hole process; and the outer side of each electrode plate is covered with a first dielectric layer, the upper surfaces of the first dielectric layers and the upper surface of the first substrate are both covered with hydrophobic layers, and the first dielectric layers are prepared by anodizing the electrode plates in an alkaline solution. The chip is suitable for biochemical detection microfluidics.

The invention discloses a super-hydrophobic paint for old pump transformation and preparation method of the paint and belongs to the field of super-hydrophobic paints. The paint comprises a componentA and a component B. The component A is a modified resin composition and comprises 6-8 parts of epoxy resin, 0.6-0.7 part of active silica micro-powder, 0.8-0.9 part of active graphene micro-powder, 0.2-0.5 part of nano-zinc oxide, 2-3 parts of active aluminium oxide, 2-3 parts of active iron powder, 0.1-0.5 part of a heat-resisting agent, 0.6-0.8 part of a toughening agent and 0.6-1 part of an accelerant; the component B is a modified curing agent composition and comprises 6.5-8.5 parts of lauryl toluenediamine, 1.5-1.8 parts of aluminium oxide, 1.2-1.8 parts of tungsten carbide and 0.5-1.5 parts of silicon carbide. The surface of an old pump is coated with the super-hydrophobic paint to form a super-hydrophobic coating, so that the super-hydrophobic paint has a super-hydrophobic function, the friction resistance is lowered, the influence of the cavitation phenomenon on the pump body is reduced, and the energy-saving efficiency of the pump body is greatly improved.

The invention relates to a method for preparing a hydrophobic porous oil-water separation material and belongs to the technical field of material processing. The method comprises the following steps:stirring and mixing sliced paraffin with liquid paraffin, performing water bath heating so as to obtain molten paraffin, weighing obsidian, pitchstone and perlite, performing ball-milling, screening so as to obtain ball-milling powder, putting the ball-milling powder and molybdenum disulfide into a quartz pipeline, sealing the quartz pipeline, vacuuming, performing heating, introducing argon intoa quartz tube, controlling a flowing speed, performing heat-preservation heating, leaving to stand, cooling to the room temperature, collecting modified granules, mixing the modified granules with molten paraffin, performing heating stirring, and performing vacuum freeze-drying, and performing crushing screening so as to obtain modified packing; putting polyether polyol, deionized water, a foam stabilizer, modified packing and diphenylmethane diisocyanate into a flask, performing stirring mixing so as to obtain a mixed liquid, casting into a mold, performing foaming treatment, performing heat-preservation heating, leaving to stand, and cooling to the room temperature, thereby obtaining a hydrophobic porous oil-water separation material.

The invention relates to the technical field of magnesium-lithium alloy surface corrosion resistance, in particular to a method for constructing a super-hydrophobic corrosion-resistant conversion filmon the surface of magnesium-lithium alloy and the magnesium-lithium alloy with super-hydrophobic corrosion resistance. The method for constructing the super-hydrophobic corrosion-resistant conversionfilm on the surface of the magnesium-lithium alloy comprises the following steps that a mixed solution comprising stearic acid, ethanol and water is mixed with the magnesium-lithium alloy, and afterhydrothermal reaction, the super-hydrophobic corrosion-resistant conversion film is formed on the surface of the magnesium-lithium alloy. Compared with existing films commonly prepared through a sol-gel method, an etching method and a soaking method, the super-hydrophobic corrosion-resistant film constructed through a hydrothermal method has the advantages of being simple and environmentally friendly. The super-hydrophobic film can reduce the contact area of corrosion liquid and a matrix, so that the corrosion resistance of the magnesium-lithium alloy can be effectively improved while the surface of the magnesium-lithium alloy is super-hydrophobic.

The invention discloses sodium alginate modified amphiphilic feather. One surface of the feather is uniformly covered with a layer of sodium alginate. The invention also discloses a preparation method of the sodium alginate modified amphiphilic feather. The method comprises the following steps of (1) dispersing sodium alginate powder into a solvent, performing oscillating and uniform mixing, and carrying out ultrasonic treatment to obtain a high-dispersity sodium alginate solution; (2) dispersing absolute ethyl alcohol into the sodium alginate solution, performing oscillating and uniform mixing, and performing ultrasonic treatment to obtain a high-dispersity mixed solution; and (3) spraying the mixed solution on one side of the feather, and carrying out vacuum heat drying to obtain the final product. The amphiphilic feather can accelerate water delivery and reduce heat loss; both the sodium alginate and the feather are biodegradable materials, which are environment-friendly and non-toxic, and are cheap and easy to obtain; and the preparation process is simple, the operation is carried out at room temperature, the cost is relatively low, the feather is environment-friendly and non-toxic, and the obtained amphipathic feather has excellent photothermal conversion efficiency and salt resistance and has a wide development prospect in the field of seawater desalination.

The invention relates to the technical field of super-hydrophobic materials, in particular to a preparation method of a super-hydrophobic fabric. The preparation method comprises the following steps:(1) by using octadecylamine as a raw material, preparing a nano octadecylamine finishing agent by using an ultrasonic dispersion method; (2) performing suction filtration on the nano octadecylamine finishing agent obtained in the step (1) by using a vacuum suction filtration method, and depositing the nano octadecylamine finishing agent on the surface of the fabric; and (3) heating the fabric obtained in the step (2) to obtain the super-hydrophobic fabric. According to the preparation method of the super-hydrophobic fabric, the super-hydrophobic property of the surface of the fabric is achieved, the static contact angle of the surface of the prepared super-hydrophobic fabric can reach 152 degrees, the super-hydrophobic fabric has good friction resistance, washing resistance and ultravioletresistance, meanwhile, less instruments and equipment are used, the steps are simple, the time is short, the original color of the fabric is not changed, operation is simple and convenient, the preparation process is carried out in a water system, and the preparation method is simple and friendly to the environment.

The invention provides a super-hydrophobic Zn-poly tetra fluoro ethylene (PTFE) composite electrodeposition layer and a preparation method thereof. The preparation method includes the steps that a steel matrix is activated by adopting a sulfuric acid aqueous solution, the activated steel matrix is used as a negative pole, zinc metal is used as a positive pole, and electrodeposition is conducted inan electrodeposition solution; and the electrodeposition solution contains a zinc salt, boric acid, PTFE powder and a surfactant, and the concentration of the PTFE powder is 10-40 g/L. In the prepared super-hydrophobic Zn-PTFE composite electrodeposition layer, sheet PTFE microstructures are evenly distributed on the surface of the electrodeposition layer, network structures are formed, most sheet PTFE microstructures are basically perpendicular to the matrix surface, the structural characteristics and low surface energy of PTFE itself make the obtained Zn-PTFE composite electrodeposition layer realize super-hydrophobicity, and at the same time, the electrodeposition layer further has the characteristics of strong adhesion and high stability.