POS4-1298
Capillarity-Driven Particle Absorbing Air Filter with Dynamic Bond Adhesive
Topic
S4. Colloids, Interfaces, and Molecular Assemblies for Functional Soft Materials
When and Where
Sep 29, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Hae Jung SON
Boseok KANG
Presenter(s)
Hyeri Jeon (Chung-Ang University)
Co-Author(s)
Abstract
Air filters are widely used for removing airborne particulate matter (PM) for their simple operation, low cost, and broad applicability. Conventional dry filters captured PM via nanonewton (nN) - scale van der Waals interaction, demonstrating poor filtration performance due to the weak particle adhesion induced particle rebound and resuspended. A strategy to coat a thin liquid film over filter enables capillarity-based strong particle adhesion. However, the practical usage of a liquid film is often hindered by inherent fluid instabilities, including the Plateau-Rayleigh instability, dewetting, and drainage. Here, to integrate mechanical stability with capillary-driven strong adhesion, we introduced a dynamic imine bond adhesive (DIBA), which maintains an elastic network to ensure structural integrity while enabling viscous adhesion. Based spontaneous bond exchange of imine bond using water molecules under room temperature, DIBA demonstrated a micronewton (µN)-scale strong capillary adhesion through viscous flow. Dynamic bond exchange further allows the captured particles to be absorbed into the matrix, thereby exposing a fresh sticky surface for sustained filtering and prolongs the increase in pressure drop by filtering. These unique particles capturing characteristics of a stable dynamic bond adhesive layer not only exhibit outstanding filtration performances but also propose a new paradigm of air purification technologies.
