Microporous Polysulfones with Enhanced Separation Performance via Integration of the Triptycene Moiety
Microporous Polysulfones with Enhanced Separation Performance via Integration of the Triptycene Moiety
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DOI：
10.1021/acs.iecr.9b04861
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发表时间：
2020-03-25
影响因子：
4.2
通讯作者：
Guo, Ruilan
中科院分区：
文献类型：
--
作者：
Corrado, Tanner;Huang, Zihan;Guo, Ruilan
在这里，我们报道了两种聚砜的合成，其中含有三苯基或酚酞作为聚合物主链中的大体积桥联单元，以考察刚性、笨拙的结构对链刚性、自由体积分数和气体传输性能的影响。与文献中报道的许多商用聚合物和其他聚砜相比，三聚三烯单元的加入提供了最刚性的主链、最大的自由体积分数和最强的气体分离性能，因为它具有与文献中报道的许多商业聚合物和其他聚砜相比的特殊组合。此外，Triptycene单元及其固有的、基于构型的自由体积的集成提供了良好的物理老化性能。特别是，三聚三苯基聚砜具有出色的H-2/CH4选择性(156)和近一倍的H-2渗透率，以及良好的O-2/N-2分离性能，O-2渗透率为1.5巴雷尔，这与基于双酚A的商用聚砜相比提高了21%，同时O-2/N-2选择性为7.7。
Here, we report the synthesis of two polysulfones containing either triptycene or phenolphthalein as the bulky bridging unit in the polymer backbone to investigate the influence of the rigid, unwieldy structures on chain rigidity, fractional free volume, and gas transport properties. Incorporation of the triptycene unit provided the most rigid backbone, greatest fractional free volume, and strongest gas separation performance, because of its exceptional combinations of permeability and selectivity, relative to many commercial polymers and other polysulfones reported in the literature. In addition, integration of the triptycene unit and its intrinsic, configuration-based free volume provided good resistance to physical aging. In particular, the triptycene-based polysulfone experienced exceptional H-2/CH4 selectivity (156) combined with nearly doubled H-2 permeability, as well as promising O-2/N-2 separation performance with an O-2 permeability of 1.5 Barrer, which is an similar to 21% increase, relative to that of the bisphenol A-based commercial polysulfone, to go along with an O-2/N-2 selectivity of 7.7.