43results about How to "Superhydrophobic stability" patented technology

The invention provides a preparation method of a superhydrophobic coating. The preparation method comprises the steps of 1, mixing 50-80 parts of hydrophobic nanoparticle dispersing liquid with the mass percentage of 2-15%, 20-50 parts of polystyrene nanoparticle dispersing liquid with the mass percentage of 1-10% and 0-30 parts of solvent according to the volume part ratio, and ultrasonically dispersing the mixture to obtain a mixed solution; 2, forming the mixed solution on the surface of a substrate and in a microstructure in the substrate; 3, drying the substrate obtained in the step 2, then, raising the temperature to 160-230 DEG C, baking to melt polystyrene nanoparticles, and taking out for naturally airing. The invention also relates to a superhydrophobic paint and the superhydrophobic coating.

The present invention pertains to a method for preparation of superhydrophobic timber on the basis of a sol-gel method, and the method is as follows: (1), silica sol synthesis, to be more specific, materials are prepared in the volume ratio of ammonia to anhydrous ethanol to ethyl orthosilicate of 1:15 to 17:1; (2), hydrophobic modification of monodispersed nano silica sol, to be more specific, hexadecyl trimethoxysilane, or triethoxysilane-1H, 1H, 2H, 2H-heptadecafluorodecyl silane is used for hydrophobic modification of the synthesized monodispersed nano silica sol, and the hydrophobic agent promotes mutual aggregation of nanoparticles to promote the formation of aggregates of silica nanoparticles; and (3) timber coating processing, to be more specific, the timber surface is coated with the hydrophobically modified silica sol solution by dipping or spraying process. Contact angles of the processed timber surface and water droplets are greater than 150 degrees, roll angles are less than 10 degrees, and a superhydrophobic film has good resistance to acid and alkali erosion and stability in high-humidity environment. The method is simple in operation, less demanding on equipment, and capable of scale production, and has wide market prospects.

A super-hydrophobic and -oleophylic cloth producing method is characterized by comprising following steps: (A) cleaning a cloth and air-drying the cloth; (B) dissolving dopamine hydrochloride and folic acid in water with stirring and pre-treating the water solution to obtain a uniform mixed solution; (C) regulating the pH of the mixed solution with an alkaline medium, adding the cleaned and air-dried cloth in the mixed solution, and performing a stirring reaction to obtain a cloth having a micro-nano structure; (D) adding the cloth in an ethanol solution of octadecylamine and carrying out a reaction to obtain the super-hydrophobic and -oleophylic cloth for oil-water separation, wherein the concentration of the dopamine hydrochloride is 0.5-2.0 mg/mL, the concentration of the folic acid is 0.2-1.0 mg/mL, the pre-treatment temperature is in the range from room temperature to 60 DEG C, and the pre-treatment time is 6-24 h. The producing method is low in cost, is simple in steps, is mild in reaction conditions and is beneficial to amplified production. The cloth is stable in super-hydrophobic property and has an application potential in the fields of oil-water separation, waterproof materials and self-cleaning materials.

The invention discloses a superhydrophobic inorganic organic nano composite polymeric coating material and a preparation method thereof. The coating material is prepared from 30 to 98 mass percent of thermosetting polymeric precursor and 10 to 70 mass percent of surface functionalized nanoparticle under the action of 0 to 5 mass percent curing agent, wherein the obtained surface water contact angle and rolling angle of the material are 120 to 180 DEG and 1 to 20 DEG respectively; and a falling water drop which is spherical can bounce up and can freely roll on the surface. The method has the characteristic of simple preparation process by using the chemical reaction between organic groups on the surfaces of the polymeric precursor and the modified nanoparticle in the solution. The coating material has the functions of stain resistance, dust prevention and self cleaning.

The invention provides a hydrophilic material super hydrophobic surface micro nano structure design method, relating to the micro nano structure function surface design preparation technical field. Protuberance ratio of micro structure is calculated according to super hydrophobic contact angle requirement; and meanwhile maximum period of micro structure is determined according to use condition; and finally, contact status of liquid and micro structure surface is verified according to the designed micro structure and structure parameter. The invention realizes surface super hydrophobic performance by controlling the form of micro structure without carrying out coating treatment on the surface, thus the super hydrophobic performance of micro structure surface can not be influenced when the structure form of the interior of micro structure is not changed even if the material is partially abrased, super hydrophobic surface has stable performance, and the performance is effective for long term.

The invention discloses an electrochemical method for preparing a superhydrophobic surface on copper substrates by using an aqueous electrolyte. The method comprises the steps of: I, dissolving potassium hydroxide and potassium peroxydisulfate into distilled water to obtain a solution A; II, dissolving tetradecanoic acid into anhydrous ethanol to obtain a solution B; III, polishing the two copper substrates by using waterproof abrasive paper, then cleanly washing the two copper substrates by sequentially using the distilled water and the anhydrous ethanol, and drying for later use; IV, placing the solution A, as an electrolyte, into an electrolytic cell, and utilizing the two dried copper substrates as an anode and a cathode respectively to electrolyze; and V, cleanly washing the electrolyzed anode copper substrate by sequentially using the distilled water and the anhydrous ethanol, then uniformly smearing the solution B to a surface of the cleanly washed anode copper substrate, and airing to obtain the copper substrates with the super-hydrophobic surface. A contact angle of the super-hydrophobic surface prepared on the copper substrates by using the method can reach more than 152 degrees, and the super-hydrophobic performance keeps stable after the copper substrates are placed in a normal condition for one year.

The invention relates to superhydrophobic wood fiber powder and a preparation method thereof, and belongs to the field of development of functional biomass materials. The invention aims at improving the utilization value of wood fiber biomass raw materials and solving the problems of complex preparation process and relatively high cost of superhydrophobic materials. The invention relates to the superhydrophobic wood fiber powder and the preparation method thereof. The preparation method comprises the following steps: firstly, crushing a lignocellulose raw material into powder by using a crusher; secondly, grafting lignocellulose powder prepared in the first step with silica particles; thirdly, adding a lignocellulose powder solid grafted with the silica particles, prepared in the second step, into a silane coupling agent for carrying out superhydrophobic modification to obtain the superhydrophobic wood fiber powder. The superhydrophobic wood fiber powder prepared with the preparation method disclosed by the invention belongs to a high added value product and has the advantages that resource utilization of the wood fiber biomass raw materials is widened and the production cost of ahydrophobic material is reduced. A preparation process is simple and is easy to control.

The invention discloses a long-acting superhydrophobic anticoagulation biovalve and a preparation method therefor. The method comprises the following steps: (1) treating a biovalve material with glutaraldehyde for 48 to 96 hours; (2) embedding nanoparticles, which are polymerized from polyphenol compounds and metal ions and contain double-bond groups, in the surface of the biovalve material; and (3) grafting surfaces of the nanoparticles with a hydrophobic substance, so as to form a hydrophobic coating. According to the long-acting superhydrophobic anticoagulation biovalve and the preparation method therefor, the superhydrophobic coating with a long-acting high water contact angle and a low roll angle is prepared on the surface of the biovalve through a simple and stable operating process without affecting properties of a valve body in accordance with moderate self-polymerization reaction conditions of polyphenols and elicitation of a reaction mechanism of the metal ions, double bonds and mercapto groups, and the requirements on long-acting anticoagulation are met through impeding adsorption of plasma proteins.

The invention discloses an electrochemical method for preparing a super-hydrophobic surface of a copper dendritic crystal. The method comprises the following steps: (1) concentrated sulfuric acid is slowly added in distilled water; and then, a copper sulfate crystal is dissolved in the solution for uniformly stirring to prepare solution A; (2) myristic acid is dissolved in anhydrous ethanol to obtain solution B; (3) oxide layers on the surfaces of two copper substrates are removed, are cleaned by distilled water and anhydrous ethanol in sequence, and are dried for future use; (4) the solution A is put in an electrolytic cell as electrolyte; and the dried two copper substrates are respectively used as an anode and a cathode for electrolysis; and (5) the electrolyzed cathode copper substrate is cleaned by the distilled water and the anhydrous ethanol in sequence; then, the surface of the cleaned cathode copper substrateis uniformly coated by the solution Bfor airing; and then, the surface is lightly wiped by sponge to obtain the super-hydrophobic surface. The super-hydrophobic surface, prepared on the copper substrate by the method, has a contact angle being 152 degrees or above, and keeps stable super-hydrophobic performance after one-year placement under conventional conditions.

The invention relates to a super-hydrophobic self-cleaning coating for a building. The coating is prepared by dispersing and mixing 2-10% by mass of heptafluorodecyl triethoxysilane, 1-10% by mass ofmethyl triethoxysilane, 1-10% by mass of perhydropolysilazane, 2-15% by mass of solid microparticles and the balance a solvent. The super-hydrophobic self-cleaning coating for the building has the advantages that the super-hydrophobic self-cleaning coating is stable in super-hydrophobic property and unlikely to age and lose effect, and can work normally in severe working conditions such as acid, alkali, high temperature and strong ultraviolet rays; and the super-hydrophobic self-cleaning coating can be cured at a constant temperature, is not high in construction condition and is suitable for various buildings.

The invention provides a preparation method of a superhydrophobic composite material taking two chemically-bonded silanized epoxy resin and block-like organosilicone/epoxy hybrid resin as a matrix. The silanized epoxy resin is prepared by utilizing a reaction of trimethoxysilane and high-purity allyl epoxy resin, the block-like organosilicone/epoxy hybrid resin is prepared by utilizing a reactionof double-hydrogen-terminated organosilicone and the high-purity allyl epoxy resin; and the two organosilicone/epoxy resin hybrid systems and micro-nano particles are blended and compounded to form asuspension, then an epoxy resin curing agent is added for matching, and the generated suspension can be sprayed, brushed or dip-coated on the surfaces of various base materials to obtain a superhydrophobic surface with high adhesive force and high mechanical strength. The preparation method has the advantages of simplicity, easiness in operation and extremely high process stability, and the formedsuperhydrophobic composite material is firm and reliable, still has the superhydrophobic characteristic after being abraded, and has very high practical values.

The invention discloses an electrochemical method for preparing a super-hydrophobic surface on a copper substrate. The electrochemical method comprises the following steps: 1) polishing copper substrates by using 800 particle-size and 1200 particle-size waterproof abrasive paper in turn, washing the copper substrates with distilled water and absolute ethyl alcohol in turn, drying the copper substrates by using an electric blower, and standing by; 2) adding potassium hydroxide and potassium peroxydisulfate into the absolute ethyl alcohol, thereby obtaining a solution A; 3) dropwise adding a material with low surface energy into the absolute ethyl alcohol, thereby obtaining a solution B; 4) placing the solution A as electrolyte into an electrolyzer, respectively taking the two dried copper substrates as an anode and a cathode, and electrolyzing; 5) washing the anode copper substrate after being electrolyzed with absolute ethyl alcohol and clean water in turn, and then placing the cleaned anode copper substrate into the distilled water and soaking for more than 2 hours; and 6) uniformly coating the solution B on the soaked anode copper substrate, and then drying in the air, thereby obtaining the copper substrate with the super-hydrophobic surface. A contact angle of the super-hydrophobic surface prepared according to the method provided by the invention is above 162 degrees.

The invention provides a stable super hydrophobic self-cleaning surface and a double-light-beam interference-method preparation method thereof. According to the stable super hydrophobic self-cleaningsurface and the double-light-beam interference-method preparation method thereof, a polished and cleaned aluminum alloy sample is fixed on a processing platform, a double-light-beam interference method of interference superposition of two coherent laser beams is adopted to perform erosion on the surface of the aluminum alloy sample, one aluminum alloy sample of a periodicity controllable size micro-nano composite structure is obtained, finally, the aluminum alloy sample is immersed in a stearic acid solution for surface modification treatment, and the stable super hydrophobic self-cleaning aluminum alloy surface is obtained. By means of the stable super hydrophobic self-cleaning surface and the double-light-beam interference-method preparation method thereof, the double-light-beam interference method and surface modification are combined, the stable super hydrophobic self-cleaning surface is prepared, by means of change of double-light-beam laser interference optical parameters, the parameters of the micro-nano composite structure of the surface of a material subjected to double-light-beam interference are adjusted, the micro-nano composite structure periodicity size and microstructure shape size are controlled, and the super hydrophobic performance and cleaning function adaptation requirements are met better.

The invention discloses a spray preparation method of an industrialized and anti-stripping large super-hydrophobic surface. A substrate with a large area is soaked in an epoxy resin solution, and thesubstrate is subjected to lifting and lowering, inclining, and leveling to obtain a pre-coated substrate; a plurality of spraying nozzles are used for ultrasonic atomization spraying; a hydrophobic coating is perpendicularly sprayed on the upper surface of the pre-coated substrate in an ultrasonic mode, and an anti-stripping and large super-hydrophobic coating is obtained on the upper surface of the substrate after low-temperature solidification. Super-hydrophobic surfaces no less than 0.8m*0.8m can be prepared on surfaces of different substrates. The super-hydrophobic performance of the prepared super-hydrophobic coating is stable, the water contact angle is more than 153 degrees, the rolling angle is less than 5 degrees, good anti-stripping performance is achieved, and the utilization rate of the super-hydrophobic coating is improved by ultrasonic atomization spraying.

The invention relates to the technical field of hydrophobic coating for an outer wall, and discloses a super-hydrophobic transparent luminous latex coating for an outer wall and a preparation method thereof. The coating is prepared from the following components in percentage by mass: 35-55 percent of styrene-acrylic emulsion, 10-30 percent of luminous pigment, 3-20 percent of stearate, 1-5 percent of nano-silicon dioxide, 3-5 percent of auxiliary and 20-30 percent of water. The super-hydrophobic transparent luminous latex coating for an outer wall has the advantages of low cost, simplicity in preparation and environmental protection, and can be applied in a large scale.

The invention relates to a method for preparing a super-hydrophobic nano Ni3S2 coating on the surface of a nickel mesh. The method comprises the following steps taht firstly, pretreating the surface of the nickel mesh to remove oil stains and impurities attached to the surface of the nickel mesh; dissolving a proper amount of sodium hydroxide and ammonium persulfate into deionized water, fully stirring and uniformly mixing, soaking the nickel mesh in the solution and heating in a water bath at the temperature of 35-65 DEG c, so that an oxidation layer is formed on the surface of the nickel net, taking out the sample, washing with deionized water and rapidly drying; then preparing a water solution with a certain concentration of sodium sulfate decahydrate and ammonium fluoride, fully stirring and heating to 60-90 DEG c, soaking the nickel mesh subjected to the treatment in the solution, and keeping the temperature for a certain time to obtain a Ni3S2 coating with a nano-protrusion structure; finally, the super-hydrophobic nano Ni3S2 coating is obtained on the surface of the nickel net through tetradecanoic acid modification, the contact angle between the coating and the deionized water is between 151-159 degrees, the rolling angle ranges from 5 degrees to 10 degrees. The method is simple to operate and low in cost, and is easy to realize industrial production.

The invention discloses a method for preparing a polymer superhydrophobic surface by virtue of hydrophobic nano particle spontaneous deposition. The method comprises the following steps: uniformly spraying hydrophobic nanoparticles onto a polymer film-shaped melt surface, so that the hydrophobic nanoparticles can be spontaneously deposited inside the melt surface in a short time at a polymer melting point or the viscous flow temperature or above, forming an insert structure, and cooling, thus obtaining the polymer superhydrophobic film. The polymer superhydrophobic film provided by the invention has the advantages of stable hydrophobic performance, water impact resistance, good friction resistance and the like. The preparation method of the invention is highly matched with the existing polymer casting and spraying process, so that only a row of hydrophobic nanoparticle spraying apparatuses is required nearby a T-shaped machine head of the casting or spraying device; and moreover, the cost is low, the repetition/continuity is good, environmental protection is achieved, and the method is suitable for mass production and wide in market prospect.

The utility discloses a coating material which is prepared from a thermosetting high molecular pre-polymer having a reaction active center and surface functionalized nano-particles under the action of a curing agent, wherein the mass percentage contents of all the components therein are as follows: 23-85% thermosetting high molecular pre-polymer having the reaction active center, 9-77% surface functionalized nano-particles, and 0-5% curing agent. The preparation method of the coating material disclosed in the invention is simple in process and free of complex parameter control; the preparation method causes no pollution during preparation and thereby is environment-friendly; and simultaneously, the coating material prepared in the invention is stable in super hydrophobicity, good in repeatability, and also low in cost; therefore, the coating material has excellent industrial application prospect.