▎ 摘　　要

NOVELTY - The composite material membrane comprises a substrate having a surface. A layer attached to the surface of the substrate comprises pressure-responsive metal-organic framework nanosheets and graphene oxide nanosheets. The pressure-responsive metal-organic framework nanosheets are layered on top of one another to provide a layered material. USE - Composite material membrane for gas separation processes and in membrane applications, e.g. gas separation, water purification, and chemical vapor deposition. ADVANTAGE - The composite material membrane is suitable for gas separation processes. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of obtaining a gas enriched in carbon monoxide from a mixed gas. DESCRIPTION OF DRAWING(S) - The drawing shows the diagrams of the crystal structure of the metal-organic framework and gate-opening membrane architecture.