5results about How to "Superhydrophobic" patented technology

The utility model discloses a kind of pollutant cleaning element and pollutant cleaning element preparation device, applied to wafer cleaning field, the pollutant cleaning element includes the cleaning surface for being contacted with target action object;The cleaning surface of pollutant cleaning element is formed with micro-nano structure;The cleaning surface of pollutant cleaning element formed with micro-nano structure has super hydrophobicity.The utility model is contacted with the cleaning surface of target action object by pollutant cleaning element, it is set to be formed with micro-nano structure, on the one hand, the specific surface area of cleaning surface is strengthened, the capacity of pollutant cleaning element adsorption and capture pollutant is improved, make cleaning effect more excellent, on the other hand, the micro-nano structure that this pollutant cleaning element possesses has super hydrophobic effect, so that liquid drop can take away pollutant when rolling on surface, improve the self-cleaning of this pollutant cleaning element, to improve the recycling of this pollutant cleaning element.

This invention relates to a method for preparing and applying a superhydrophobic expanded graphite coating. The invention addresses the problems of complex preparation processes, high costs, or insufficient mechanical stability in existing technologies. The method uses expanded graphite as the main raw material and adds epoxy resin to prepare a superhydrophobic expanded graphite coating with photothermal properties. The coating is uniformly sprayed onto the surface of circular nickel foam using a spraying technique, resulting in a multifunctional superhydrophobic expanded graphite photothermal evaporator with sustainability, corrosion resistance, recyclability, self-cleaning capabilities, and water purification abilities. This invention belongs to the field of superhydrophobic coating preparation technology.

This invention provides an air sterilization and filtration material for aquaculture and its preparation method. Using fibers containing surface hydroxyl and carboxyl groups as the substrate, a polymer network is constructed by reacting fluorosilane and polyvinyl alcohol in an alkaline system at 80-120°C. After modification of the silicate network structure and the polyvinyl alcohol polymer network, the modified fiber A reacts with phosphate and perfluoroalkyl acrylate monoesters to generate a double-bonded polymerized acrylate network structure, which is bonded to the hydroxyl groups on the fiber substrate surface through esterification. Simultaneously, the hydroxyl groups of modified fiber A undergo a condensation reaction with the phosphorus-oxygen bonds of phosphate, forming a polymer network material. The phosphate and carboxyl groups on the surface of this polymer network material also coordinate with silver ions at coordination sites, resulting in the air sterilization and filtration material for aquaculture. The material exhibits antibacterial and bactericidal properties, excellent resistance to acid mist, and excellent antibacterial and antifungal properties. Furthermore, it possesses superhydrophobic properties, exhibiting very low air resistance when used in aquaculture air sterilization and filtration applications.

The present application discloses a chemical solution, a preparation method and an application thereof for etching of SMT printing templates, and relates to the technical field of etching liquids. The preparation method of the chemical solution is as follows: ferric chloride is added to a hydrochloric acid solution to obtain a solution A; sodium chloride is added to a cupric chloride solution to obtain a solution B; fluorosilane FT-922, distilled water and anhydrous ethanol are mixed and ultrasonically dispersed, and then magnetic stirring is taken out to fully hydrolyze it; nonylphenol polyoxyethylene ether NP-10 and sodium silicate are added and stirred evenly to obtain a composite etching protective agent; solution A, solution B, and a composite etching protective agent are mixed in a volume ratio of 4-6:1:0.01-0.05, stirred evenly, and a chemical solution for etching of SMT printing templates is obtained. After the chemical solution provided in the present application etches the SMT printing template, the surface of the material is matte and the structure is uniform, and the surface of the template after etching also has excellent hydrophobic and antifouling properties.

The invention discloses a one-step preparation method of super-hydrophobic PTFE (Polytetrafluoroethylene) with a micro-nano double-layered structure, and particularly relates to the field of thermal spraying processes, which comprises the following steps: step 1, performing sand blasting treatment on the surface of a workpiece to roughen the surface of the workpiece; 2, under the condition that PTFE emulsion is not injected, a direct-current plasma spray gun is started, and the surface of the workpiece is scanned through pure flame flow for preheating; and 3, after preheating is completed, PTFE emulsion is injected into flame flow, the surface of the workpiece is sprayed, and the super-hydrophobic PTFE coating of the micro-nano double-layer structure is prepared. According to the method, the PTFE emulsion is used as a raw material for the first time, the super-hydrophobic PTFE coating with the micro-nano double-layered structure is prepared through direct-current plasma spraying, and one-step rapid preparation of the super-hydrophobic PTFE coating is achieved. According to the method, PTFE curing and sintering treatment in the prior art are not needed, any etching post-treatment process is also not needed, and the micro-nano double-layer surface structure is formed after the coating is prepared.