POS2-0197
Re-entrant Porous Cellulose Structures of Reversible Networks prepared by LCST-Induced Shrinkage
When and Where
Oct 23, 2025
12:00am - 12:00am
Presenter(s)
Taein Lee (Chung-Ang University)
Co-Author(s)
Abstract
Re-entrant structures have attracted significant attention for stretchable materials due to their negative Poisson’s ratio and excellent deformation stability. In this study, hydroxypropyl cellulose (HPC) was utilized to fabricate porous structures with re-entrant geometries through its thermoresponsive shrinkage behavior. HPC-Borax gels with reversible crosslinking were prepared, and directionally porous foams were subsequently fabricated using the Directional Melt Crystallization (DMC) process. Scanning electron microscopy (SEM) confirmed the formation of pores aligned along the crystal growth direction. The resulting foams exhibited thermally induced shrinkage above the lower critical solution temperature (LCST), showing shrinkage strains ranging from 11% to 17%. This study demonstrates the feasibility of fabricating re-entrant porous cellulose structures through thermoresponsive shrinkage and reversible crosslinking.
