利用同步小角／廣角度X光散射技術探究高分子複合體之相行為

Exploring Phase Behavior of Polymeric Composite via Synchrotron Small- and Wide-angle X-ray Scattering

本研究以具有生物相容性的聚乙二醇（Polyethylene oxide, PEO）摻混離子液體（ionic liquids, ILs）形成之EO/IL複合體作為探究的新穎材料，本研究使用國家同步輻射研究中心（National Synchrotron Radiation Research Center, NSRRC）的加速器光源解析其奈米結構與其相轉換行為。由於離子液體具有諸多優異的性質，本研究擬選擇離子液體扮演結晶調控的角色，由於離子液體能均勻溶解於PEO區域之間，因而可影響PEO鏈段的結晶行為，並改變其形成結晶的驅動力。本研究藉由執行一系列變溫的小角/廣角度X光散射儀（Small/Wide-angle X-ray Scattering, SWAXS）實驗，同時分析微觀結構、相轉換機制與結晶動力學，並建立其結構與特性之關聯性（structure-property relationship），究成果將對EO/IL複合體的設計與後續加工製程提供理論依據。

This research explores novel composites composed of polyethylene oxide (PEO) and ionic liquids (ILs), focusing on their nanostructural characteristics and phase transition behavior. The composites are synthesized by blending biocompatible PEO with ILs, and their structural properties are examined using synchrotron light source at the National Synchrotron Radiation Research Center (NSRRC). The study highlights the role of ILs as modulators of crystallization, attributed to their unique properties, which significantly affect the crystallization behavior and driving forces of PEO chains through homogeneous dissolution within the EO microdomains. Temperature-dependent synchrotron small- and wide-angle X-ray scattering (SWAXS) measurements conducted at BL23A1 of NSRRC are employed to investigate the nanostructure, phase transitions, underlying mechanisms, and crystallization kinetics of the composites. The objective is to elucidate the structure-property relationships governing EO/IL composites and to determine optimal processing parameters based on their phase behavior, thereby providing a theoretical framework to guide the rational design and fabrication of functional EO/IL materials.