Su Norman C, Buss Hilda G, McCloskey Bryan D, Urban Jeffrey J
Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States.
ACS Macro Lett. 2015 Nov 17;4(11):1239-1243. doi: 10.1021/acsmacrolett.5b00681. Epub 2015 Oct 26.
Membranes with selective gas transport properties and good mechanical integrity are increasingly desired to replace current energy intensive approaches to gas separation. Here, we report on the dual enhancement of transport and mechanical properties of hybrid cross-linked poly(ethylene glycol) membranes with aminopropyl-modified silica nanoparticles. CO permeability in hybrid membranes exceeds what can be predicted by Maxwell's equation and surpasses values of the pure polymer. Furthermore, dynamic mechanical and thermogravimetric analyses reveal increases in both the storage modulus and thermal stability in hybrid membranes, with respect to silica nanoparticle loading.
具有选择性气体传输特性和良好机械完整性的膜越来越受到人们的青睐，以取代当前能源密集型的气体分离方法。在此，我们报道了用氨丙基改性的二氧化硅纳米颗粒对杂化交联聚（乙二醇）膜的传输性能和机械性能的双重增强。杂化膜中的CO渗透率超过了麦克斯韦方程的预测值，且超过了纯聚合物的值。此外，动态力学和热重分析表明，杂化膜的储能模量和热稳定性均随二氧化硅纳米颗粒负载量的增加而提高。
