Pebax membranes-based on different two-dimensional materials for CO2 capture: A review

Since the onset of the industrial age, annual global CO2 emissions have risen, significantly affecting the climate and natural ecosystems. Addressing this, the development of carbon capture, utilization, and storage (CCUS) technologies becomes crucial. Gas membrane separation, recognized for its efficiency, low energy consumption, and eco-friendly nature, is rapidly gaining prominence in global carbon capture efforts. Polyether-block-polyamide (Pebax), with its high CO2 affinity and resilient mechanical properties (attributed to its elastic polyether and robust polyamide segments) is gaining traction in CO2 separation research. Yet, the inherent trade-off effect poses challenges for its industrial application. This article delves into the current research landscape of gas separation membranes made of Pebax and assorted 2D nanomaterials for CO2 separation. It outlines the separation mechanism of Pebax materials and elucidates the CO2 separation membrane's transport mechanism. Further, the application of gas separation membranes formed by combining Pebax with various 2D nanomaterials for CO2 capture is also described in detail. Relevant studies underscore that these gas separation membranes offer enhanced separation efficacy and stability, positioning them as potential leaders in CO2 separation solutions. The paper concludes by highlighting challenges in Pebax-based research and suggesting future research avenues.