30results about How to "Has super hydrophobic effect" patented technology

The invention discloses a preparation method of double-self-cleaning fabric. The method comprises steps as follows: 1, modified nano titanium dioxide is added to water; 2, the fabric is irradiated for treatment; 3, the fabric treated in the step 2 is soaked in a modified nano titanium dioxide water solution prepared in the step 1 and then taken out to be dried, and the self-cleaning fabric is obtained. The preparation method adopts a simple process, the cost is low, and industrial production is easily realized. The fabric prepared with the method has double self-cleaning effects including a photocatalytic self-cleaning effect and super-hydrophobic self-cleaning effect and has lasting photocatalytic activity.

The present invention relates to a method for manufacturing a super-hydrophobic film sheet by generating a structure having projections for providing a super-hydrophobic effect such as that of a real lotus leaf by controlling the number of times, and the amount of time, a photoresist is baked and providing a superhydrophobic surface by coating a polymethylsiloxane (PDMS) with a transparent material having hydrophobic qualities. The method comprises the steps of: (a) cleaning a surface of a silicon wafer; (b) coating the top of the silicon wafer with photoresist (AZ4620) using a spin coater, and soft-baking the silicon wafer in an oven; (c) exposing a structure manufactured in step(b) using a mask aligner; (d) developing using a photoresist developing solution (AZ400K); (e) performing PDMS molding on a top of a structure manufactured in step (d); and (f) removing the photoresist (AZ4620) using acetone, thereby completing a superhydrophobic film sheet.

The invention relates to a self-repairing super-hydrophobic anti-drag elastomer thin film and a preparation method thereof. A sharkskin V-shaped groove structure is copied on the surface of an elastomer, and a polyarcylamide-polyfluoroalkyl acrylate segmented copolymer capable of self assembling and forming a micro-nano structure is further grafted on the surface of the elastomer; thus, the thin film has self-repair super-hydrophobic performance, a static water contact angle can reach 150 degrees or more, and a rolling angle is smaller than 10 degrees. When the anti-drag film is attached to a rotational viscometer rotor to perform an anti-drag performance test, drag reducing efficiency can reach 20%. The self-repairing super-hydrophobic anti-drag elastomer thin film disclosed by the invention has the advantages that 1, a super-hydrophobic anti-drag method and a bionic anti-drag method are combined together, so that the anti-drag film can have a better anti-drag effect under a laminar condition and a turbulent condition; 2, after surface chemical components of polyfluoroalkyl acrylate grated to the surface of the super-hydrophobic film are damaged, the polyfluoroalkyl acrylate can be self repaired after being soaked by a solvent or being heated under high temperature, so that the film can have a super-hydrophobic effect again.

The invention discloses a polyvinylidene fluoride (PVDF) based micro-pore film and a preparation method thereof. The polyvinylidene fluoride based micro-pore film comprises a polyvinylidene fluoride micro-pore film provided with a supporting layer in the middle and a low-surface-energy substance coating on the surface of the polyvinylidene fluoride micro-pore film. The preparation method comprises the following steps: selecting two types of polymers, wherein one is polyvinylidene fluoride; dissolving the two polymers into a solvent system to prepare a polymer solution; adding a pore-forming agent into the polymer solution; after uniformly stirring, standing and de-foaming to obtain a film-forming solution; immersing the supporting layer into the film-forming solution to obtain a primary micro-pore film; dissolving and etching the other polymer from the primary micro-pore film to obtain a primary PVDF based micro-pore film; immersing the primary PVDF based micro-pore film into a finishing solution containing the low-surface-energy substance and drawing out from a roller to obtain the PVDF based micro-pore. The film-forming solution is prepared by selecting two types of the incompatible polymers and the surface of the porous film is coated with the low-surface-energy substance, so that a microcosmic rough structure is formed on the surface of the micro-pore film and the super-hydrophobic effect is achieved.

The invention discloses a super-hydrophobic chip for enrichment and condensation of molecules as well as a preparation method and an application thereof. The preparation method comprises the following steps: tackifying treatment of a silicon chip which is cleaned is carried out, photoresist is uniformly glued on a silicon chip, and baking is carried out; pre-positioning of the baked silicon chip is carried out for a pattern on a photoetching board and automatic para-position operation is carried out, after pre-positioning is carried out, exposure treatment is carried out, developing treatment is carried out, deep silicon etching treatment is carried out for the silicon chip, crystal film Au is injected on the silicon chip with a silicon column array structure by magnetron sputtering, in order to obtain a template material; graphite which is cleaned is used as a cathode, the template material is used as an anode, the cathode and the anode are placed in an electrodeposition solution in order to obtain a chip with a nanometer silver silicon column array structure, the chip is taken out and cleaned with clear water, and pure argon is used for blowing and drying. The super-hydrophobic chip for enrichment and condensation of molecules has the advantages of hypersensitiveness, fast response, and low loss rate of solvents.

The invention discloses a method for constructing a calcium carbonate super-hydrophobic structure on a surface of bamboo wood, and belongs to the technical field of surface modification of bamboo materials and wood materials. The method comprises the following steps that (1), mixed liquid is prepared; (2) the bamboo materials or the wood materials are placed in the mixed liquid obtained in the step (1) to be stirred, the temperature is kept at 5 DEG C to 75 DEG C, and the bamboo materials or the wood materials loaded with the calcium carbonate super-hydrophobic structure are obtained.; and (3), the obtained bamboo materials or wood materials, obtained in the step (2), loaded with the calcium carbonate super-hydrophobic structure are cleaned for 1 time to 5 times through straight-chain saturated aliphatic hydrocarbons, and then are cleaned for 0 time to 5 times through water, the water content is dried to 1% to 29%, and the calcium carbonate bamboo materials or wood materials loaded with the super-hydrophobic structure are obtained. Through calcium carbonate modification, a hydrophobic thin film is constructed on the surface of the bamboo wood, and the surface has the super-hydrophobic effect; and the method is high in stability, achieves the hydrophobic and mould-proof effects, and is simple in production technology and convenient to implement.

The invention discloses a method for synthesizing a nano-SiO2 hybrid combed organic fluorosilicon copolymer. Aminopropyl modified SiO2 and a combed organic fluorosilicon copolymer are prepared first,and then the nano-SiO2 hybrid combed organic fluorosilicon copolymer is prepared. A waterproof fabric having a super hydrophobic effect and a good softness is produced in a one-step manner through adopting a padding and baking finishing technology by adopting the prepared nano-SiO2 hybrid combed organic fluorosilicon copolymer as a treatment fluid with a fabric as a substrate, the hydrophobic angle of the waterproof fabric reaches 161 DEG, the water droplet rolling angle of the waterproof fabric can reach 7 DEG, and the waterproof fabric can be washed with water for about 32 times.

The invention belongs to the technical field of functional materials, and relates to a preparation method of superhydrophobic and superoleophilic nickel-plated carbon fibers. In this method, a layer of metal nickel is plated on the surface of carbon fiber through pretreatment, electroplating nickel and fluorination processes, and makes it super-hydrophobic. Pretreatment: Acetone method to remove glue, acid and alkali solution to remove oil at high temperature, and then roughen the surface of carbon fiber to make the surface show a rough microstructure, and finally neutralize; electroplating nickel: immerse the dispersed carbon fiber in a nickel ion-containing In the solution, fix the cathode of the DC power supply, and place it symmetrically parallel to the anode nickel plate; fluorination: soak the nickel-plated carbon fiber in the fluorosilane ethanol solution. The contact angle of superhydrophobic superoleophilic nickel-plated carbon fiber to water is greater than 150°, and the contact angle to oil is less than 10°. The method has the advantages of simple operation, low cost and the like, and can effectively realize high-purity separation of various oil-water mixtures.