Lee Bo Mi, Kim Deuk Ju, Nam Sang Yong
J Nanosci Nanotechnol. 2015 Mar;15(3):2351-5. doi: 10.1166/jnn.2015.10260.
A series of polyimides were synthesized by a polycondensation reaction using various aromatic dianhydrides and diamines containing bulky cardo and hydroxyl groups. The imidization and chemical structure of the polyimides were confirmed by NMR and FT-IR. The thermal and gas properties of the polyimides were measured by time-lag, XRD, TGA, and DSC studies. The polyimides showed excellent solubility in common organic solvents and high thermal stability. The CO2 selectivity of HPI membrane was higher than traditional polyimides. In particular, the incorporation of hydroxyl groups improved the CO2 permeability of the polyimide due to increased carbon dioxide solubility. The HPI was thermally converted to polybenzoxazole (PBO) at 450 °C.
通过缩聚反应，使用各种含有庞大的“卡多”基团和羟基的芳香族二酐和二胺合成了一系列聚酰亚胺。通过核磁共振（NMR）和傅里叶变换红外光谱（FT-IR）确认了聚酰亚胺的亚胺化和化学结构。通过时间滞后、X射线衍射（XRD）、热重分析（TGA）和差示扫描量热法（DSC）研究测量了聚酰亚胺的热性能和气体性能。聚酰亚胺在常见有机溶剂中表现出优异的溶解性和高热稳定性。HPI膜对二氧化碳的选择性高于传统聚酰亚胺。特别是，由于二氧化碳溶解度增加，羟基的引入提高了聚酰亚胺的二氧化碳渗透性。HPI在450℃下热转化为聚苯并恶唑（PBO）。
