Abstract
• Simple and effective MXene-based composite aerogel preparation method. • Excellent mechanical property and compressive strength is up to 16 kPa. • Sensitivity can as high as 114.55 kPa -1 in the wide pressure range up to 21.78 kPa. • Durability of the sensor can withstand more than 24000 cycles of compression. • High-performance wearable pressure sensor for wireless signal transmission. The emerging wearable electronics promote the rapid development of flexible piezoresistive sensors. However, it remains a big challenge to develop a high-performance piezoresistive sensor with high sensitivity, wide pressure range, and stable output. Here, an lightweight (17.33 mg cm -3 ) cellulose acetate nanofiber/sodium alginate synergistically enhanced MXene composite aerogel is fabricated through a liquid nitrogen-assisted unidirectional-freezing strategy. The conductive MXene-based aerogel possesses excellent mechanical performance and high compressive strength (16 kPa). Importantly, the unique synergies endow the aerogel assembled piezoresistive sensor with an ultra-high sensitivity up to 114.55 kPa -1 in a wide pressure range up to 21.78 kPa, and it can withstand more than 24000 cycles of compression. More interestingly, the prepared sensor can be used to realize real-time monitoring of various human activities and developed as a wireless device to transmit information. The unparalleled sensing performance endows the MXene composite aerogel with a broad application prospect in the field of flexible intelligent wearable devices.
Published Version
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