製備多階層陽極氧化鋁模板與探討高分子於奈米孔洞內之反潤濕現象

Abstract

近年來，為了控制材料表面的特性，表面修飾技術被廣泛地應用於各領域，如：航太業、塗料、紡織與高分子塗層等。為了了解表面改質在奈米尺度下的應用，我們希望能藉由改質孔徑大小可控的陽極氧化鋁模板，來探討高分子材料的形貌變化。 本論文分為兩個工作，在第一個研究工作中，我們利用十八烷基三氯矽烷對陽極氧化鋁模板進行表面修飾，並利用溶液法將高分子導入改質後的孔洞內，製備出奈米薄膜。之後，進行熱退火一段時間，可以在孔洞內觀察到薄膜的反潤濕現象。此外，藉由控制熱退火時間，我們推測在改質孔洞內反濕潤現象的機制是連續且自發的分解反應(spinodal decomposition)。在第二個研究中，我們利用陽極氧化法和表面修飾法製備孔洞上下性質不對稱的模板。利用擴孔反應可以製備出孔徑大小不對稱的孔洞模板；利用表面修飾則可以製備出上下表面性質不對稱的孔洞模板。本篇論文研究讓我們更加了解在表面修飾之奈米孔洞對受限之高分子形貌變化的影響。

In recent years, the technique of surface modification has attracted great interest by numerous scientists because of its wide applications in areas such as aerospace industry, painting, textile, an polymeric coating. For further understanding the nano-scale applications of surface modification, we study the morphology change of polymeric materials in the modified pores of anodic aluminum oxide (AAO) templates. This dissertation has two parts. In the first part (Chapter 3), we investigate the dewetting phenomenon of poly(methyl methacrylate) (PMMA) thin films coated in the nanopores of modified AAO templates. Through observing different thermal annealing times, we conclude that the mechanism of dewetting for thin films in coated naopores is spinodal decomposition. In the second part (Chapter 4), we fabricate the AAO templates with double-sized nanopores and different surface properties using the additional processes of pore-widening and surface modification. After the processes, the nanopores with the larger sizes are hydrophobic and the nanopores with the smaller sizes are hydrophilic. This dissertation provides deeper understanding in the morphology changes of polymers confined in the surface-modified nanopores.