1.D.89.  The Polymer/Graphene oxide Heterogeneous Nanoporous Membrane (PGoHM) Family 

A robust three/two-dimensional polymer/graphene oxide heterogeneous nanoporous membrane has been constructed in large scale via the self-assembly approach by chemically designing a robust charge-density-tunable nanoporous ionomer with uniform pore size (Zhu et al. 2017). To obtain a nanoporous polymer that maintains high mechanical strength and promotes multifunctionality, these researchers designed a series of amphiphilic copolymers by introducing a positively charged pyridine moiety into the engineered polymer polyphenylsulfone. The multiphysical-chemical properties of the membrane enable it to work as a nanogate switch with synergy between wettability and surface charge change in response to pH. The transmembrane ionic transport properties of this two-/three-dimensional porous system were characterized. By adjusting the charge density of the copolymer via chemical copolymerization through a controlled design route, the rectifying ratio of this asymmetric membrane could be amplified 4 times. A concentration-gradient-driven energy harvesting device with this charge-density-tunable nanoporous membrane and a maximal power of approximately 0.76 W m-2 was obtained. This membrane may be useful as energy devices, biosensors, and smart gating nanofluidic devices (Zhu et al. 2017).



Zhu, X., Y. Zhou, J. Hao, B. Bao, X. Bian, X. Jiang, J. Pang, H. Zhang, Z. Jiang, and L. Jiang. (2017). A Charge-Density-Tunable Three/Two-Dimensional Polymer/Graphene Oxide Heterogeneous Nanoporous Membrane for Ion Transport. ACS Nano. [Epub: Ahead of Print]