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Interface-engineered Polybenzoxazine/Aramid Ⅲ nanofiber composite aerogels with ultralow thermal conductivity, exceptional mechanical robustness, and intrinsic flame retardancy
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DOI：10.1016/j.jmst.2025.12.038.png)
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Abstract
En 中文
• Interface-engineered design: In-situ polybenzoxazine coating on aramid III nanofibers forms robust interfacial bonding and hierarchical flame-retardant barriers. • Multifunctional performance: Achieves ultralight density (0.315 g·cm⁻³) with high compressive strength (18.92 MPa) and low radial thermal conductivity (0.032 W·m⁻¹·K⁻¹). • Superior fire safety: Exhibits LOI of 41.7 %, 88% reduction in char length, 78 % lower peak heat-release rate, and 60.7 % residual-char yield. • Long-term durability: Maintains superhydrophobicity (151° contact angle) via silicon-nanowire coating under varied humidity. • Mechanistic insight: Hydrogen bonding, π–π stacking, and P=O/P–O bonds synergistically enhance interfacial adhesion and char-layer integrity.
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