| Summary: | 碩士 === 國立臺灣科技大學 === 高分子系 === 97 === The superhydrophobic self-clean thin film has extensive applications to the industrial ascribed to its excellent water repellency, low droplet sliding angle. In this study, the BA-a polybenzoxazine superhydrophobic thin film as the main theme and discusses in two parts below:
(1)The self-clean polybenzoxazine based thin film coated on nanograss surface-like silicon wafers which possesses both anti-reflective and superhydrophobic properties.
First of all, we demonstrate nanograss surface-like silicon wafers etched by H2 plasma as the substrate, then coated with SiO2 nanoparticles blended BA-a polybenzoxazine thin film subsequently. We found that when the content of SiO2 nanoparticles increased, the hydrophobicity of the film increased consequently, and conversely the anti-reflective of light decreased. As a result, the ratio of BA-a polybenzoxazine and SiO2 nanoparticles as about 10:1 to thin film which possesses superhydrophobic property and the reflectance of light can be lower than 10%.
(2)Carbon nanotubes has excellent durability and extensive applications. We use the carbon nanotubes as substrate to prepare the superhydrophobic film. First, 10wt% of BA-a benzoxazine dissolved in THF and spin-coated on glass slide, then carbon nanotubes spread on it and cured subsequently. The carbon nanotubes fastened on cross-linked polybenzoxazine. Finally, different concentration of BA-a benzoxazine coated on the top. The concentration of BA-a benzoxazine as 10wt% which provided better hydrophobicity. The durability of the film increased by improving its hydrophobicity. When immersing the film in deionized water for 1.5 days, the superhydrophobicity maintained consistent after drying in oven.
|
|---|
