Effect of 2D Nanosheets On Gas Separation Properties In Polymer Nanocomposite Membranes

Recently atomic layered 2D nanosheets (e.g., graphene) have keenly attracted in many important technological applications such as electronic devices, biosensor, and membrane-based separation processes. One of potential applications is to use gas-selective atomic layer for gas separation. The main idea is to achieve the active membrane layer with a few nanometers thick for high flux and high selectivity. In this study we demonstrate multi-layered membranes densely stacked using 2D nanosheet for size-sieving separation mechanism in gas separation. We have achieved defect-free multi-layered composite membranes for gas separation by controlling the effective pathway between such multi-layered sheets via intercalation of metals or organic dopants. These multi-layered nanosheets can be easily transferred on any microporous or nanoporous substrates for practical gas separation applications, which might be a promising material in the field of membrane science and technology.