Abstract
In the present study, an ultralight, super-flexible, waterproof, and breathable aerogel with low thermal conductivity is produced by crosslinking hybrid nanofibers of cellulose diacetate (CA) with an aqueous blocked isocyanate crosslinker (BIC) in situ . The mechanical properties of the hybrid nanofiber aerogel (HNFA) can be tuned by adjusting the BIC/CA ratio while retaining its thermal conductivity (27.2–28.4 mW·m −1 ·K −1 ) and porosity (99.25%–99.36%). The HNFA has super-elastic at ultralow temperatures (−196 °C), good compressive fatigue resistance, outstanding bending resistance (it is capable of withstanding 20,000 bending cycles), favorable breathability, and water resistance (contact angle: 162°). Therefore, it is a promising material for warm clothing for use in extreme environments.
Published Version
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