Nano Interface Special Invasive Research

Nanometer interface materials with special invasive, such as super-hydrophobic, super-hydrophilic, super-olephobic, etc, have important application value in production and people’s life. It is an effective way to obtain special infiltration interface by controlling nano structure morphology and chemical composition of the material surface. The research of special infiltrating on the nano interface materials mostly concentrated on the normal temperature condition. However, there is little research for changes of special invasive change on nano interface material in the extreme temperature condition, such as high temperature, low temperature. Due to the extreme temperature is more close to the practical application environment, so its study also has greater potential application value.In this dissertation, we firstly controllably prepared various nanoarray structures, such as nano column, nano cone, nano bore, etc. which are complementary to template morphology, on the surface of copper and PMMA, PC by nanometer stamping based on anodic alumina template and electrochemical synthesis. We know that its special infiltrating change rule at high temperature and low temperature, and we obtained the nano interface with high water droplets bouncing point temperature and anti-condensation at low temperature. The main research contents are as follows:(1) The preparation of nano column hole array structure on copper surface was studied. We acquired AAO templates with different parameters, such as different hole spacing, different hore size, different hole deep, through the two-steps electrochemical anodizing legal system. And then nanometer column array structure on polymethyl methacrylate (PMMA) surface was prepared by using the nanoimprint technology based on anodic alumina template, and finally copper film with the nanometer hole array structure based on nano column template were prepared by electrochemical deposition.(2) Leidenfrost phenomenon of surface with nano column hole array structure was studied. The high speed CCD was used to shoot the droplet of bouncing state on the copper film with nanometer hole array structure of the different parameters in open system and nitrogen protection system. As a result, we found that the droplet bouncing point temperature (Tb) of the copper film with nanometer pore structure is higher than that of the ordinary copper sheet under the two conditions. The result shows that the nanometer pore structure is helpful to improve Tb value, which is beneficial to the heat transfer. We also studied the mechanism of bouncing and the variation of the Tb of the copper film with different structural parameters.(3) The preparation of nano cone array structure on polymer surface and its anti-condensation performance were studied. The five steps of circulation anodic oxidation method was used for preparation of taper hole anodic alumina templates. we adopted the nanoimprint technology to prepare different height of polycarbonate (PC) nanometer cone array structure with300nm hole spacing based on AAO templates. We get excellent nanometer cone array structure by regulating height. After hydrophobically modification, the as-prepared structure has excellent resistance to the formation of dewing.