| Summary: | 博士 === 國立中山大學 === 材料與光電科學學系研究所 === 106 === In this study, we have combined, few directions into one fundamental work. In the first part of this study, we tethered terminal uracil groups onto short-chain poly(ethylene glycol) (PEG) to form the polymers, uracil (U)-PEG and U-PEG-U. Differential scanning calorimetry, wide-angle X-ray scattering, 7Li nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy revealed that the presence of the uracil groups in the solid state electrolytes had a critical role in tuning the glass transition temperatures and facilitating the transfer of Li+ ions. Then, we have synthesized a multi-diamidopyridine-functionalized polyhedral oligomeric silsesquioxane (MD-POSS) and blend it with U-PEG and U-PEG-U copolimers. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) revealed that supramolecular structures self-assembled from mixtures of MD-POSS and U–PEG and from MD-POSS and U–PEG–U.
In second part of this study we employed poly(ethylene oxide-b-lactide) (PEO-b-PLA) diblock copolymers as templates to prepare mesoporous silica materials. Data reveals, that interaction in the system led to the formation of a variety of composition-dependent mesoporous structures, including hexagonally packed cylinders, face-centered cubic-packed spheres, and disordered spherical micelle structures. When using POSS derivatives as silica precursor, we have found out, that formation of micelles with incorporation of crystallized POSS segments in between “arms” of the micelle is more favorable than any other formation. As a result, the ratio of template to precursor can be used to control the formation of the micelle like structures in the future.
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