▎ 摘　　要

The ability of membrane technologies to dynamically tune the transport behavior for gases and liquids is critical for their applications. Although various methods have been developed to improve membrane success, tradeoffs still exist among their properties, such as permeability, selectivity, fouling resistance, and stability, which can greatly affect the performance of membranes. Existing elastomeric membrane designs can provide antifracture properties and flexibility; however, these designs still face certain challenges, such as low tensile strength and reliability. Additionally, researchers have not yet thoroughly developed membranes that can avoid fouling issues while realizing precise dynamic control over the transport substances. In this study, we show a versatile strategy for preparing graphene oxide-reinforced elastomeric liquid gating membranes that can finely modulate and dynamically tune the sorting of a wide range of gases and liquids under constant applied pressures. Moreover, the produced membranes exhibit antifouling properties and are adaptable to different length scales, pressures, and environments. The filling of graphene oxide in the thermoplastic polyurethane matrix enhances the composites through hydrogen bonds. Experiments and theoretical calculations are carried out to demonstrate the stability of our system. Our membrane exhibits good stretchability, recovery, and durability due to the elastic nature of the solid matrix and dynamic nature of the gating liquid. Dynamic control over the transport of gases and liquids is achieved through our optimized interfacial design and controllable pore deformation, which is induced by mechanical stimuli. Our strategy will create new opportunities for many applications, such as gas-involved chemical reactions, multiphase separation, microfluidics, multiphase microreactors, and particulate material synthesis. Microsystems & Nanoengineering Fluidics: Tuning into better performing membranesChinese scientists have developed a tunable membrane that is highly stretchable and could be used in a range of applications, including microfluidic devices, multiphase microreactors, and for particulate material synthesis. The ability to dynamically tune the transport behavior of gases and liquids is critical for membrane applications. And although recent tunable elastomeric membrane designs offer flexibility and anti-fracture properties, they have low tensile strength, are unreliable, and suffer from fouling. Now, Xu Hou and colleagues from Xiamen University in China use a novel liquid gating technology to develop a membrane made from graphene oxide-reinforced thermoplastic polyurethane that can be dynamically tuned for a wide range of gases and liquids, while also exhibiting anti-fouling properties. Liquid gating technology which uses a capillary-stabilized functional liquid to form reversible gates inside the pores, shows prominent properties in controlling complex, selective, multiphase substance transport. The liquid gating membrane is adaptable to different length scales, pressures, and environments and could be used in multiphase separation, chemical reactions, and drug delivery.