Influence of surface functionalization on the contact electrification of fabrics
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Abstract
With the increasing popularity of artificial intelligence, wearable and functional fabric triboelectric nanogenerators (F-TENGs) have an increasingly prominent role in human activities. Here, a new self-powered fabric composition detection system with high sensitivity and responsivity has been developed from F-TENGs modified by different functional groups. The power unit and group analysis system were successfully integrated into one device. Groups with different electronegativity were grafted onto the silk surface, and this silk was applied as the friction electrode to assemble TENG devices. The TENG with the original silk electrode exhibits a stable output performance with a short-circuit current of 11.8 μA and an output voltage of 49.8 V, while the corresponding short-circuit current and output voltage would gradually decrease with the increase of electronegativity for the grafted groups. This variation trend has resulted from different contributions of different functional groups to contact electrification of silks. Meanwhile, the group analysis system exhibits good sensitivity and selectivity for common functional groups with different electronegativity. This work provides a novel strategy to fabricate the fabric composition analysis system, which possesses tremendous application potential to collect human motion energy for detecting group types without any additional power supplies.
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