Microfluidics facilitates the recreation of biological processes by mimicking in vivo microenvironments into in vitro models as the organs-on-chip (OOC); but it can also facilitate tasks such as cell sorting , DNA amplification , and point-of-care diagnostics and detection . In microfluidic devices for biomedical applications, membranes can play diverse roles including cell and particle separation, selective transport of biomolecules, and contribution to precise fluid control within the system. Furthermore, membranes can simulate physiological barriers, such as the intestinal, alveolar, or blood-brain barriers to study drug transport, disease mechanisms, and tissue interactions (Figure ).