期刊
ADVANCED ENGINEERING MATERIALS
卷 23, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.202001169
关键词
aerogel composites; aramid fibers; harsh environment; manufacturing; wearable textiles
资金
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Building Technology Office (BTO) [DE-EE0008675]
This study presents a composite material of polymer fibers and ceramic aerogel nanocomposites, showing thermal management performance from low to high temperature in harsh environments, and superior mechanical properties suitable for manufacturing wearable textiles.
High-performance lightweight polymer fibers are attracting significant interest for wearable systems, where its thermal insulation performance is indispensable for harsh environments. However, one drawback of polymer fibers is its limited operating temperature range. Herein, a crosslinked poly(p-phenylene terephthalamide) fiber and ceramic aerogel nanocomposite is reported, exhibiting hot and cold thermal management from cryogenic to high-temperature condition (over 400 degrees C) and robust mechanical performance, which can be produced using additive textile manufacturing. The resulting ceramic aerogel nanocomposites demonstrate a low density (0.08 g cm(-3)), a low thermal conductivity (0.034 W m(-1) K-1), and a high compressive mechanical strength of 1.1 MPa, due to the crosslinked interfacial interaction between the aramid fiber and the silica aerogel. A finite-element model is developed to study the compression performance of aramid-aerogel composite, demonstrating that the robust mechanical performance is strengthened by interfacial bonding. These findings demonstrate that composite sheets are promising candidates for the low-cost manufacturing of wearable textiles for applications in harsh environments.
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