二氧化鈦/聚苯胺混摻結構之製備

Abstract

本研究利用原位聚合法合成二氧化鈦/聚苯胺的混摻結構，有別於傳統的物理混摻，結構為聚苯胺包覆奈米二氧化鈦的核殼粒子。藉由TEM、EDS觀察確認包覆情況與元素分析；利用SEM觀察成膜後表面情況與量測導電度。因為二氧化鈦/聚苯胺薄膜表面會產生龜裂現象，故添加聚乙烯醇使表面平坦。 利用XRD瞭解二氧化鈦/聚苯胺的晶體結構；利用UV和FTIR瞭解當添加二氧化鈦後對聚苯胺作用力的影響；利用TGA去探討當添加二氧化鈦後對熱重量損失溫度的改良；熱穩定性的實驗中，可觀察到添加二氧化鈦可增加聚苯胺的熱穩定性，並且得知薄膜劣化與擴散作用相關；感測性質的實驗中，因PVA含量過高，無法得知其結果。

The thesis was to study the structure of titania/polyaniline hybrid structure by using in-situ polymerization. Different from the traditional physical blends, the structure was titania being wrapped by polyaniline to form the core-shell particles. The condition of wraps and element analysis were checked by TEM and EDS. The surface condition and the conductivity of the film were observed by SEM. We added the Poly(vinyl alcohol) to prevent from the surface crack of titania/polyaniline. The crystal structure of titania/polyaniline was showed by XRD. The effect of polyaniline after adding the titania was understood by UV and FTIR. The improvement of weight-loss temperature after adding the titania was known by TGA. Adding titania could increase the thermal stability of polyaniline from the experiment of thermal stability. It was indicated that the aging effect was related to diffusion. The sensing of the film could not be understood because of too high volume fraction of PVA.