43results about How to "Superhydrophobic stability" patented technology

The invention provides a novel surface super-hydrophobization method for an aluminum material (aluminum or an aluminum alloy). The method comprises the following steps of: polishing the aluminum material with metallographic abrasive paper, cleaning the polished aluminum material with acetone and ethanol and treating the washed aluminum material in boiling water; and putting the aluminum material into coupling agent-containing solution of toluene for reaction at the temperature of 80 DEG C for 4 to 8 hours, reacting the reaction product with solution of an end functional group polymer at the temperature of between 80 and 120 DEG C for 4 hours and cleaning and drying the reaction product to obtain a super-hydrophobization metal aluminum material of which the surface is grafted with a hydrophobic polymer layer, wherein the surface contact angle of the super-hydrophobization metal aluminum material is up to 150 to 157 degrees. An aluminum-based material used in the method is not limited by any crystal lattice and a prepared super-hydrophobic functional membrane is bonded with the surface of an aluminum substrate through a chemical bond, so that an obtained material with super-hydrophobic property has easily controlled quality and stable performance. A surface pre-treatment method and a surface coating method adopted by the aluminum substrate have the advantages of simple process, convenient operation, no need of complex and expensive equipment or long processing time, easy realization of industrialization and suitability for surface super-hydrophobic modification on large-area or specially-shaped or complex aluminum material parts.

The invention relates to a method for preparing a stable super-hydrophobic antibacterial fabric by a one-pot method. Add fluorine-free silane modifier, ultrasonically treat and mix evenly to obtain a treatment solution; then soak the washed and dried fabric in the treatment solution, perform ultrasonic treatment, take out the fabric treated with the treatment solution and place it in the treatment solution. Dry in a heated oven; and then repeat the operation for at least 3 times to obtain a stable superhydrophobic antibacterial fabric. The method of the invention is simple and time-saving, shortens the polymerization time of dopamine and simplifies the process, and enables the obtained fabric to have higher durability and better super-hydrophobicity.

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 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 invention discloses an electrochemical method for preparing a superhydrophobic surface of copper dendrites. The method comprises the following steps: 1. Slowly add concentrated sulfuric acid to distilled water, then dissolve copper sulfate crystals in the solution, and obtain solution A after stirring evenly 2. Dissolve myristic acid in absolute ethanol to obtain solution B; 3. Remove the oxide layer on the surface of the two copper substrates, then rinse them with distilled water and absolute ethanol successively, and dry them for later use; 4. Dissolve the solution A is placed in the electrolytic cell as the electrolyte, and the two dried copper substrates are respectively used as the anode and the cathode, and electrolyzed; 5. Rinse the electrolyzed cathode copper substrate with distilled water and absolute ethanol in turn, and then the solution B Apply evenly on the surface of the cathode copper substrate after washing, let it dry, and then wipe the surface lightly with a sponge. The contact angle of the superhydrophobic surface prepared on the copper substrate by the method of the present invention can reach more than 152°, and the superhydrophobic performance remains stable after being placed for one year under conventional conditions.