School of Chemical Engineering and Energy , Zhengzhou University , Zhengzhou 450001 , China.
ACS Appl Mater Interfaces. 2019 Jan 30;11(4):4338-4344. doi: 10.1021/acsami.8b17599. Epub 2019 Jan 18.
The computational simulation of porous graphene oxide (PGO) indicated that it has great potential for the preparation of gas separation membranes. However, scaling up the manufacture of multilayer, defect-free porous graphene oxide membrane with consistently sized nanopores is extremely challenging. Here, we prepared layer-by-layer CO-philic Pebax1657 membranes that were functionalized by o-hydroxyazo-hierarchical porous organic polymers (o-POPs) and PGO. The d-spacing of pristine PGO could be finely regulated through CO-philic o-POPs to facilitate the permeability of CO. In addition, the o-POPs exhibit "N-phobic, CO-philic" properties with the phenolic hydroxyl and the azo group. The best of the POP-PGO membrane exhibits that the CO permeability and ideal selectivity of CO/N are 232.7 Barrer and 80.7, respectively, and it has surpassed the Robeson's upper bound (2008).
多孔氧化石墨烯（PGO）的计算模拟表明，其在气体分离膜的制备方面具有巨大的潜力。然而，大规模制备具有一致尺寸纳米孔的多层、无缺陷多孔氧化石墨烯膜极具挑战性。在此，我们制备了层层 CO 亲和性 Pebax1657 膜，其通过邻羟基偶氮分层多孔有机聚合物（o-POPs）和 PGO 功能化。通过 CO 亲和性邻羟基偶氮分层多孔有机聚合物可精细调节原始 PGO 的层间距，以促进 CO 的渗透性。此外，o-POPs 具有“N 憎 CO 亲”的特性，其中包括酚羟基和偶氮基团。最佳的 POP-PGO 膜表现出 CO 的渗透率和 CO/N 的理想选择性分别为 232.7 Barrer 和 80.7，超过了 Robeson 的上限（2008）。
