Condensate Microdrop Self-propelling Function Films Research Based On Aluminum And Polymer Surface

When the room temperature stream encounters a solid material of low temperature, condensation phenomenon will occur. Condensation is a very normal phenomenon in industrial production, condensate droplets adhere to the surface may result in the corrosion of the equipments, the short circuit of electronic devices, the decline of heat transfer efficiency. This seriously affect the efficiency of industrial production and the stability of the equipment. As a result, the elimination or inhibition of the condensate droplets is very important and valuable. In this paper, we made a research of the condensation performances on the surface of polycarbonate and aluminum.(1) Nanocone structure on the polycarbonate surface could be fabricated by means of the method of nano-imprinting. Through exploring the morphological evolution of the PC nanonipples varied with etching time, we can determine optimal etching time:110 min. The diameter of the top of the nanocone is 25 nm. After low-surface-energy coating, the nanocones exhibit excellent condensation microdrops self-propelling function.(2) Using a simple, cheap one-step-voltage-changed electrochemical oxidation method to realize the in-situ growth of high-quality alumina nanorod-on-nanopore structure. Through the regulate of the reaction time, the electrolyte temperature, the concentration of electrolyte, the starte voltage, the pressure rise rate, discusses the affect of the various experimental parameters on the surface texture during the process of experiment. After hydrophobic treatment, the alumina surface exhibits a stable, non-sticky superhydrophobic property. Under the condition of high humidity and low temperature, the sample’s condensation microdrops self-propelling performance was tested in comparison with the smooth hydrophobic aluminum foil. We can get the similar structures on the aluminum fins through the above electrochemical method. Imitating the working environment of air-conditioner to confirm the aluminum fins modifying with FAS possess excellent moisture self-cleaning and condensation microdrops self-propelling function.