藉孔洞結構聚醯胺混成膜及固有孔洞聚醯胺膜提升電致變色應答表現之研究

Abstract

本論文分成四個章節：第一章為緒論，講述功能性高分子、電致變色的歷史與發展、電致變色材料中的奈米結構以及有機−無機複合材料的介紹；第二章探討同時加入由電解質所形成的孔洞結構及用二氧化鋯形成的混成材料是否對於聚醯胺膜的電致變色行為有加成的效果；第三章則是討論將產生分子內自由體積的五苯荑結構導入電致變色聚醯胺所形成的共聚物相對於對應的均聚物是否在電致變色行為上有增進的結果；而所有結果總結於第四章。

This study has been divided into four chapters. Chapter 1 gives a general introduction of high performance polymers, the history and development of electrochromism, nanostructures in electrochromism, and organic-inorganic hybrids. In chapter 2, porous polyamide hybrid films were prepared to investigate the synergistic effect of porous structure and organic-inorganic hybrids toward electrochromic (EC) behaviors. Porous structure produced by the electrolyte and hybrid content through sol-gel reaction with metal oxide had been shown to enhance EC properties in different mechanisms: the former provides channels for counter-ions to diffuse in and out of the film more easily, and the latter offers an electron-storage group that can assist charge transferring during the redox process. Therefore, by combining both of the modifications, a more advanced EC performance is expected to be obtained. In chapter 3, pentiptycene structure is introduced to the polymer chain. There are V-cavities and U-cavities in the scaffold of pentiptycene, which form the internal molecular free volume (IMFV). The free volume it caused may be analogue to the porous structure, implying that pentiptycene could give a positive effect on the EC properties. Though the pentiptycene used in this study was not electrochromic, if the structure was combined with EC centers, the material would be very promising. Finally, all the results are concluded in Chapter 4.