Multifunctional wafer-scale graphene membranes for fast ultrafiltration and high permeation gas separation.

ABSTRACT: Reliable and large-scale manufacturing routes for perforated graphene membranes in separation and filtration remain challenging. We introduce two manufacturing pathways for the fabrication of highly porous, perforated graphene membranes with sub-100-nm pores, suitable for ultrafiltration and as a two-dimensional (2D) scaffold for synthesizing ultrathin, gas-selective polymers. The two complementary processes-bottom up and top down-enable perforated graphene membranes with desired layer number and allow ultrafiltration applications with liquid permeances up to 5.55 × 10^-8 m³ s^-1 Pa^-1 m^-2. Moreover, thin-film polymers fabricated via vapor-liquid interfacial polymerization on these perforated graphene membranes constitute gas-selective po

SUBMITTER: Choi K 

PROVIDER: S-EPMC6251721 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature