Additive manufacturing (or 3D printing) is an evolving technology that shows great potential as a sustainable method for fabricating gas separation membranes for carbon capture applications. Compared to other gas separation techniques or membranes fabricated by conventional formative methods, the use of 3D-printed membranes is more advantageous because of their simplicity, higher energy efficiency, practicality, flexible and tailorable designs, and high separation efficiency. Although polymeric, cementitious, and gel-based materials have been exploited for the development and fabrication of robust and highly efficient CO 2 -capturing membranes, these materials require further innovation to become fit and suitable as feedstock for 3D printers. In this work, we review several and potential membrane materials used for capturing CO 2 and discuss their corresponding separation mechanisms and fabrication via 3D printing. We also summarize the challenges and limitations in using 3D-printed membranes and provide perspectives towards high-performance membrane fabrication and future industrial applications.

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