摘要 本研究利用溶膠-凝膠法（Sol-Gel method），結合有機高分子聚乙烯醇縮丁醛（Polyvinyl butyral resin，PVB）的成膜性與無機矽氧烷化合物的熱穩定性與硬質性，製備出有機無機混成硬質薄膜，並在製備條件導入二氧化矽粉體(SiO2 powder)以及藉由六甲基二矽氮烷(Hexamethyldisilazane，HMDS)在薄膜表面反應來進行薄膜特性改質，而製備出更加親/疏水性薄膜。 有機/無機硬質膜之製備方法是將矽氧烷化合物與蒸餾水、酸觸媒混合先進行初步反應，並加入PVB的異丙醇（IPA）溶液，混合之後經旋轉塗佈而得。 實驗所製備之薄膜先進行穿透率與接觸角之非破壞性測量後，再施作破壞性之硬度測試，其後再觀察薄膜表面型態與探討材料之物性。 實驗結果發現所製備的有機無機硬質膜，穿透率可達95%以上，硬度最高可達6H。在越酸性環境下反應所製備之薄膜接觸角雖然下降，但是可提高薄膜硬度。 薄膜特性改質部份，藉由HMDS在薄膜表面反應來進行薄膜特性改質能有效提高薄膜材料之接觸角。另外在製備條件中導入200nm之二氧化矽粉體後可增加薄膜材料表面粗糙度。因此可以得到親水性膜之接觸角小於5°，而疏水性膜之接觸角則為139.3°。 Abstract Preparation of organic / inorganic hard films by using PVB (polyvinyl butyral resin) solution and SiO2 precursor via sol-gel process has been developed. Besides, more hydrophilic / hydrophobic films can be obtained by adding the SiO2 powder into the hard films and further modification the films with hexamethyldisilazane (HMDS) or not.. The PVB solution were prepared by dissolving PVB in isopropyl alcohol (IPA). The SiO2 precusor was prepared by reaction of silane compound with acid aqueous solution in IPA. The hard films were obtained by mixing the PVB solution with SiO2 precursor and then spin coating it on the substrate. Prepared hard films were characterized by non- destructive measurement (such as transmittance, contact angle) and destructive measurement (such as hardness, thickness). The results find the transmittance of organic / inorganic hard films can be greater than 95% and the hardness of the films can be reached to 6H. The contact angle of films is decreased under more acid environment, but the hardness of the films is increased. The contact angle of the prepared films can be increased by modification of it with HMDS. Furthermore, the rough surface of the films can be improved by adding SiO2 powder in it. The contact angle of the hydrophilic and hydrophobic films can be less than 5o and 139.3o, respectively.
