Nanocomposite
conductive fiber has been newly developed as a lightweight
material with high flexibility and strong weavability, which can meet
the requirements of flexible wearable devices. Herein, lightweight
porous aramid nanofibers (ANF) and carbon nanotube (CNT) aerogel fibers
coated with polypyrrole (PPy) layers are prepared by a wet spinning
method for motion detection and information transmission. The ANF/CNT/PPy
aerogel fiber with low density (56.3 mg/cm3), conductivity
(6.43 S/m), and tensile strength (2.88 MPa) were used as motion sensors
with high sensitivity (0.12) and long life (1000 cycles). At the same
time, the differential conductivity of aerogel fibers is utilized
to reduce the information transmission time (up to 46%). High- and
low-temperature-resistant (−196 to 100 °C) aerogel fibers
are also available as a quick heater and ionic solution detector.
In summary, the prepared ANF/CNT/PPy aerogel fiber can be used as
a multifunctional sensor for human-health detection and motion monitoring.
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