摘 要 在室溫及酸性條件下，以四乙氧基矽酸鹽 (TEOS) 與三甲氧基乙烯基矽酸鹽 (TMVS) 作為共同矽源，分別使用三嵌段高分子 Pluronic F127 與溴化16基三乙氧基銨 (CTEABr) 作為主要模板試劑，以直接合成法製備結構排列整齊、具有立方、中孔洞並含有乙烯官能基的二氧化矽材料 FDU-12 (Fm3m) 與 SBA-1 (Pm3n)。 乙烯官能基的含量可藉由固態 13C 與 29Si 核磁共振光譜加以證明。而相較於直接合成乙烯官能基化的SBA-15，乙烯官能基化的 FDU-12 與 SBA-1 其乙烯官能基含量分別可達到 30 % 與 25 % 而不會對中孔洞立方結構造成損壞或無法控制的相轉變。 乙烯官能基化 FDU-12 其C=C雙鍵可輕易吸附 Methyl methacrylate (MMA) 而在孔洞中進行高分子聚合反應。 乙烯官能基化 SBA-1 的中孔洞結構在 HCl/EtOH 溶劑萃取處理下較純 SBA-1 來得規則而穩定。 Abstract Direct synthesis of well-ordered cubic mesoporous silicas FDU-12 (Fm3m) and SBA-1 (Pm3n) with vinyl functionality were direct-synthesized via room temperature co-condensation of tetraethoxysilane (TEOS) and trimethoxyvinylsilane (TMVS) major templated with tri-block copolymer Pluronic F127 and cetyltriethylammonium bromide (CTEABr) under acidic conditions, respectively, has been achieved. Qualitative evidence of the presence of chemically attached vinyl moieties was provided by solid-state 13C and 29Si NMR. In contrast to the direct synthesis of vinyl-functionalized SBA-15, the concentration of TMVS that co-condensed with TEOS could be up to 30% and 20% without observing significant loss in the long-range mesostructural ordering and uncontrollable phase transformation of the vinyl-functionalized FDU-12 and SBA-1, respectively. The C=C double bonds of vinyl groups on v-FDU-12 are readily accessible to adsorbed methylmethacrylate (MMA) to induce polymerization within the mesopores. Vinyl-functionalized SBA-1 materials have a better ordered and stable structure towards the treatment with the solvent extraction (HCl/EtOH) than the pure silica SBA-1 without any functionality.
