POS7-1010
Self-reinforced aramid composites with enhanced crack resistance and dimensional stability: A platform for multifunctional thermal management
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)
Hyeonji Kim (Hanyang University)
Co-Author(s)
Abstract
Advanced thermal management materials capable of operating under high temperature and flame environments are increasingly required in aerospace, electric vehicle battery, and electronic applications. Ceramic materials offer excellent thermal stability and thermal management capabilities; however, their applications are often limited by brittleness, reduced processability, and dust generation at high filler loadings. Therefore, a robust platform capable of accommodating various functional fillers is highly desirable.
p-Aramid is a high-performance fiber with outstanding mechanical strength, flame resistance, and thermal stability. Through deprotonation using DMSO/KOH, p-aramid can be converted into aramid nanofibers (ANF), which can be further processed into ANF pulp. In this study, a self-reinforced aramid composite consisting of ANF, ANF pulp, and aramid fibers (AF) was developed. AF provide mechanical interlocking within the composite, mitigating brittle failure and improving durability, while the multiscale structure suppresses crack propagation and enhances dimensional stability.
The proposed self-reinforced aramid structure serves as a multifunctional platform for incorporating various fillers while reducing brittleness and enabling high ceramic loading. h-BN provides directional heat transfer characteristics, whereas aerogel imparts excellent thermal insulation. Furthermore, blocks with different thermal functions can be laminated to construct customized thermal-management structures.
ANF pulp and aramid fibers were combined to fabricate a self-reinforced matrix, followed by the incorporation of h-BN and aerogel through a hot-pressing process. Mechanical, thermal, flame retardant, and thermal conductivity properties were evaluated. The microstructure and filler orientation were characterized using SEM and 2D SAXS/WAXS analysis.
p-Aramid is a high-performance fiber with outstanding mechanical strength, flame resistance, and thermal stability. Through deprotonation using DMSO/KOH, p-aramid can be converted into aramid nanofibers (ANF), which can be further processed into ANF pulp. In this study, a self-reinforced aramid composite consisting of ANF, ANF pulp, and aramid fibers (AF) was developed. AF provide mechanical interlocking within the composite, mitigating brittle failure and improving durability, while the multiscale structure suppresses crack propagation and enhances dimensional stability.
The proposed self-reinforced aramid structure serves as a multifunctional platform for incorporating various fillers while reducing brittleness and enabling high ceramic loading. h-BN provides directional heat transfer characteristics, whereas aerogel imparts excellent thermal insulation. Furthermore, blocks with different thermal functions can be laminated to construct customized thermal-management structures.
ANF pulp and aramid fibers were combined to fabricate a self-reinforced matrix, followed by the incorporation of h-BN and aerogel through a hot-pressing process. Mechanical, thermal, flame retardant, and thermal conductivity properties were evaluated. The microstructure and filler orientation were characterized using SEM and 2D SAXS/WAXS analysis.
