Bioinspired Ultrastretchable Aramid Triboelectric Aerogels for Intelligent Vehicle Seat.

Abstract

Aerogels have demonstrated considerable potential in the field of flexible sensors owing to the tunability of porous architectures. The brittleness and low stretchability induced by high porosity remain key limitations restricting aerogel applications. Inspired by the orientation of muscle fibers, an ultrastretchable aramid triboelectric aerogel is developed by programmed ice crystal growth. The orientation fitting degree of the triboelectric aerogel reaches 98%, which is 2.6 times higher than that of conventional freeze-casting methods. This ordered structure disperses tensile stresses during stretching, enabling the triboelectric aerogel to sustain an unprecedented 539% strain. Leveraging this aerogel, the triboelectric sensing array with vibration feedback was designed. Combined with deep learning algorithms, it achieved real-time monitoring and vibration feedback alerts of driving behaviors within a single sensor interface for the first time. This study offers a promising strategy for intelligent driving systems to identify and mitigate unsafe driving behaviors.