| Summary: | 碩士 === 國立臺灣大學 === 化學工程學研究所 === 105 === Materials possess ‘Petal Effect’ property that has been investigated for many years since 2008. Petal effect materials have potentials in liquid transportations, single molecule spectroscopy, or printing industries. However, most materials for making these unique materials are thermoplastic which cost a lot for processing, and most of them consist of halogen groups, which might do harm to the environment. Thus, in this work a new polymer without the above flaws is constructed. A new polymer containing triazole functional groups is produced by an azide-alkyne huisgen cycloaddition to replace the chlorines on the polyepichlorohydrin (PECH) by the triazoles. The structure of the product is investigated and confirmed by Gel Permeation Chromatography (GPC), Fourier Transform Infrared Spectroscopy (FTIR), Nuclear Magnetic Resonance Spectroscopy (NMR), and X-ray Diffraction (XRD). Nonetheless, the results of the static and dynamic contact angles indicated the product possesses petal effect property, for the surface free energy of the polymer is 21.7 mN/m, and the contact angle hysteresis is up to 111.1˚. The Energy Dispersive Spectroscopy (EDS) and X-ray Photoelectron Spectroscopy (XPS) showed that there were only C, O, and N atoms inside the product, which is more environment-friendly compared to other low-surface-free-energy materials. To know the formation of the petal effect property, the surface-morphologies are measured by Atomic Force Microscope (AFM) and Scanning Electron Microscopy (SEM), and both of them show special structures with high roughness of the product. The unique structures might result from the interactions between oxygen atoms and hydrogen atoms on the triazoles, and the interactions are proved by Transmitted Infrared Spectroscopy (Transmitted IR) and XPS. Moreover, the anti-fungal test, ASTM G21-15, reveals that there is no fungi that could grow on the product, making the surface suitable for medical uses. Preparation and the characteristics of the product, denoted by PECH-Triazole, are presented in this work.
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