POS7-0757

Multidimensional Natural Filler-Reinforced Polyurethane Composite Foams with Hierarchical Poroacoustic Pathways

Topic

S7. Innovations in Polymeric Composites: From Design and Processing to Industrial Applications

When and Where

Sep 30, 2026 08:30 - 09:30

Room 301 (Grand Ballroom)

Session Chairs

Heesuk KIM

Jinhye BAE

Presenter(s)

Eunsu Gong (Department of Materials Science and Engineering, Seoul National University)

Co-Author(s)

James Sangmin Choo (Department of Materials Science and Engineering, Seoul National University), Jinsoo Na (Department of Materials Science and Engineering, Seoul National University), Geun Woong Ryoo (Department of Materials Science and Engineering, Seoul National University), Young In Jo (Department of Materials Science and Engineering, Seoul National University), Jeong-Yun Sun (Department of Materials Science and Engineering, Seoul National University), Woong-Ryeol Yu (Department of Materials Science and Engineering, Seoul National University), Min Sang Kwon (Department of Materials Science and Engineering, Seoul National University), Ki Tae Nam (Department of Materials Science and Engineering, Seoul National University), Juhyuk Park (Department of Materials Science and Engineering, Seoul National University)

Abstract

Polyurethane foams (PUFs) are widely used as lightweight sound-absorbing materials, yet achieving enhanced acoustic performance while maintaining mechanical robustness remains challenging. In this study, multidimensional natural fillers consisting of microscale biochar and alkali-treated jute fibers were incorporated into polyurethane foams to construct a hierarchical porous architecture. Through ultrasonication-assisted hydrogen-bond rearrangement, biochar was attached to the jute fiber surface, forming an interconnected reinforcement network within the polyol premix. The rheological behavior of the premix was systematically investigated and correlated with the evolution of foam microstructure during reactive foaming. By tuning filler composition, the pore structure, cell openness, and tortuous airflow pathways were effectively controlled. The resulting hierarchical architecture promoted acoustic energy dissipation while simultaneously reinforcing the foam structure. The multidimensional filler network also suppressed filler agglomeration and contributed to the formation of hierarchical poroacoustic pathways. This work demonstrates a scalable and sustainable strategy for designing lightweight polyurethane composite foams with multifunctional performance for noise-control applications.

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