膜
气体分离
聚合物
材料科学
高分子化学
极限抗拉强度
部分
化学工程
磁导率
巴勒
延伸率
苯并恶唑
热稳定性
化学
复合材料
有机化学
工程类
生物化学
作者
Shenghai Li,Hye Jin Jo,Sang Hoon Han,Chi Hoon Park,Seungju Kim,Peter M. Budd,Young Moo Lee
标识
DOI:10.1016/j.memsci.2013.01.011
摘要
Novel spirobisindane-containing thermally rearranged (TR) benzoxazole(spiroTR-PBO) membranes were prepared by thermal treatment of four newly synthesized spirobisindane-containing hydroxyl-polyimides (spiroHPIs). Transport properties of spirobisindane-containing polymers were investigated along with fractional free volume and density measurements, as well as molecular simulation analysis. The resulting spiroTR-PBOs exhibited high free volumes and superior mechanical properties in terms of elongation and tensile strength, and these findings were supported by molecular dynamic simulations. SpiroTR-PBO membranes containing hexafluoroisopropylidene moiety in the polymer backbone showed a six-fold increase in CO2 permeability, compared to that of the spiroHPI precursor. SpiroTR-PBO membranes showed strong potential to be applied in carbon capture and separation of gases because of their high gas permeability coupled with robust mechanical properties.
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