Original ResearchPublished 17 April 2026Structure-dependent CO 2 separation in PEBAX membranes incorporating polystyrene nanoparticles: freestanding versus thin-film composite configurationsJun Seok Hwang · Young Jun Kim · Do Young Maeng · Dong Hyuk Shin · Jong Hak KimFrontiers in Membrane Science and Technologydoi 10.3389/frmst.2026.1777137