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Molecular Bridges Stabilize Graphene Oxide Membranes in Water
Authors:Mengchen Zhang  Yangyang Mao  Guozhen Liu  Gongping Liu  Yiqun Fan  Wanqin Jin
Abstract:Recent innovations highlight the great potential of two‐dimensional graphene oxide (GO) films in water‐related applications. However, undesirable water‐induced effects, such as the redispersion and peeling of stacked GO laminates, greatly limit their performance and impact their practical application. It remains a great challenge to stabilize GO membranes in water. A molecular bridge strategy is reported in which an interlaminar short‐chain molecular bridge generates a robust GO laminate that resists the tendency to swell. Furthermore, an interfacial long‐chain molecular bridge adheres the GO laminate to a porous substrate to increase the mechanical strength of the membrane. By rationally creating and tuning the molecular bridges, the stabilized GO membranes can exhibit outstanding durability in harsh operating conditions, such as cross‐flow, high‐pressure, and long‐term filtration. This general and scalable stabilizing approach for GO membranes provides new opportunities for reliable two‐dimensional laminar films used in aqueous environments.
Keywords:graphene oxide  molecular bridges  nanofiltration  stability
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