PVAc-Silica-竹炭粉混成材料之制备及其性质.docVIP

PAGE PAGE 19 PVAc-Silica-竹炭粉混成材料之製備及其性質 Preparation and Properties of PVAc-Silica-Bamboo Char Powder Hybrids 伍允瑄 李文昭 (通訊作者) 彭詩威 台中市南區402國光路250號 國立中興大學森林學系 Email: wjlee@.tw PVAc-Silica-竹炭粉混成材料之製備及其性質 伍允瑄1 李文昭2 彭詩威3 【摘要】 本研究將四乙基矽氧烷(Tetraethoxysilane; TEOS)之預聚物與溶劑型聚醋酸乙烯樹脂(polyvinyl acetate; PVAc)及竹炭粉混合，其中TEOS藉由溶膠-凝膠反應(Sol-gel reaction)形成矽氧(Silica)網狀結構，並與PVAc及竹炭粉混成，形成同時具備有機與無機特性之PVAc/Silica/竹炭粉混成材料(Hybrid)。由試驗結果得知，PVAc/TEOS預聚合物混成溶液可於常溫下進行溶膠-凝膠反應形成PVAc/Silica有機與無機混成材料，並提升PVAc之耐水性能。PVAc/Silica/竹炭粉混成材料製作時，先將PVAc/TEOS預聚物攪拌1 hr，並經3 hr靜置後再加入竹炭粉可獲得較佳之成膜性，浸水試驗顯示竹炭粉可固定於混成薄膜中而不被析出，乙酸乙酯溶出試驗則顯示較高之重量保留率，然添加竹炭粉將降低PVAc/Silica混成材料之耐水性及機械強度，DSC熱分析則顯示其吸熱峰溫度向低溫側偏移。PVAc/Silica及PVAc/Silica/竹炭粉混成材料薄膜製作時以常溫乾燥硬化者其性能優於加熱硬化者，且成膜3週後可達最佳之薄膜機械強度。 ─────────────────────────────────────────────────1.國立中興大學森林學系大學部學生。Undergraduate student, Department of Forestry, ───────────────────────────────────────────────── 1.國立中興大學森林學系大學部學生。 Undergraduate student, Department of Forestry, National 2.國立中興大學森林學系教授 (通訊作者)，402台中市南區國光路250號。 Professor, (Corresponding Aauthor), Department of Forestry, National Chung-Hsing University. 3.國立中興大學森林學系碩士生。 Graduate student, Department of Forestry, National Preparation and Properties of PVAc-Silica-Bamboo Char Powder Hybrids Yun-Shuan, Wu1 Wen-Jau, Lee2 Shih-Wei Peng3 【Abstract】 In this research, the tetraethoxysilane (TEOS) prepolymer, solvent type polyvinyl acetate (PVAc) and bamboo char powder were mixed. The TEOS would undergo sol-gel reaction to form a silica network structure and blending with PVAc and bamboo char powder to form a PVAc/silica/bamboo char powder hybrids those had both the organic and inorganic characteristics simultaneously. The results showed that PVAc/TEOS prepolymer solution could undergo the sol-gel reaction at room temperature to form an organic-inorganic hybrid and improve the water resistance of PVAc. For the PVAc/silica/bamboo char powder hybrids preparation, the bamboo char powder added after the mixture of PVAc solution and TE