Design and evaluation of core–shell yarn-based triboelectric sensing fabric for human motion monitoring
摘要
Pressure sensor textiles are essential for smart textile development, but their creation is challenging due to cost and sensitivity requirements. This study introduced a comparative analysis of the effectiveness of single triboelectric mode (STEM) versus double triboelectric modes (DTEM) sensing woven fabric using core–shell yarn with nylon and polytetrafluoroethylene (PTFE) filaments. It explores three modes of triboelectric technology: (STEM) using a plain weave pattern, (DTEM) utilizing two instances of the same plain weave pattern, and (DTEM) combining plain and twill weave patterns to improve performance outcomes. The triboelectric fabric with plain structures (STEM) shows an initial output of 0.80 nA, rising to 1.50 nA when connected with two plain structures. Incorporating one plain structure and one twill structure woven fabric (DTEM) further boosts the output to 1.80 nA. Notably, (DTEM) achieves 0.80 nA and 1.50 nA outputs at 1 Hz and 2 Hz, respectively, with the highest output of 2.00 nA at 3 Hz. The sensor fabric demonstrates sensitivities of 0.269 V/kPa−1 and 0.013 V/kPa−1 across pressure ranges from 0.22 to 0.44 kPa and 0.47 to 0.74 kPa. The adaptable, flexible, and lightweight apparatus effectively tracks dynamic movements in human joints, spanning the knee, underarm, elbow, and hand, showcasing promise for multifunctional self-powered pressure sensor textiles in smart textile applications.