- 學位論文
磁性高分子複合材料於熱治療與熱電材料之應用
Magnetic polymer composites for applications in hyperthermia therapy and thermoelectric materials
摘要
磁性材料應用範圍廣泛且發展蓬勃，本研究結合磁性粒子與高分子，製備出具有磁性之高分子複合材料，分別應用於癌症熱治療及熱電材料之發展。 由於對人體副作用較少，熱治療被視為未來最具潛力治療癌症的技術之一，本實驗利用氧化還原法，製備出純鐵(Fe0)奈米粒子，並以四乙氧基矽烷(TEOS)或鈦酸四丁酯(TBOT)修飾其表面，而成核殼(core-shell)結構，藉此保護Fe0避免其接觸空氣而氧化。並加入聚碳酸丙烯酯(Poly(Propylene Carbonates),PPC)高分子，藉由其生物相容性，使其可置於生物體中，進行癌症熱治療。 熱電材料為熱與電兩種不同型態能量互相轉換的功能性材料，目前已成為節能減碳具高度環保效益的熱門材料。本實驗利用化學合成法，將四氧化三鐵(Fe3O4)成長於奈米碳管表面，並以過濾方式製備多孔結構之材料，同時加入二甲基矽氧烷高分子(PDMS)，以增強其機械強度。藉此製備出具高導電性、低熱傳導性，以及高機械強度之高分子複合材料，使其具有良好之熱電性質，以發展出可商業化之高分子熱電材料。
並列摘要
There has been a recent research focus on the development of magnetic materials because of their numorous advanced applications. The goal of this study is to design magnetic polymer composites for application in hyperthermia therapy and thermoelectric materials. Magnetic hyperthermia therapy is one of the promising technologies to treat cancers due to its effectiveness with only mild side effects. This study utilized redox reaction to prepare metallic iron (Fe0) particles and then coated their surfaces with a silica (SiO2) layer or titanium dioxide (TiO2) layer, which could prevent Fe0 from oxidation. The Fe0@SiO2 particles were incorporated with poly(propylene carbonates) to form magnetic polymer compostes for application in hyperthermia therapy. Thermoelectric materials are very effective in converting waste heat sources into useful electricity. This study is to develop novel porous carbon nanotube (CNT)-polymer composites with improved thermoelectric properties. The properties of the resulting CNT-polymer composites were controlled by changing the added polydimethylsiloxane and the magnetic iron oxide particles on the surface of the CNT. The developed CNT-polymer composites have high electric conductivity and low conductivity with appreciablee mechanical strength, which is promising for application in next-generation polymer thermoelectric material.