Construction of Stretchable and Large Deformation Green Triboelectric Nanogenerator and Its Application in Technical Action Monitoring of Racket Sports

Abstract

The rapid development of E-Skin has attracted researchers’ attention to portable wearable devices. However, it is a great challenge to achieve high-output performance and high-environmental protection simultaneously. Polyhydroxybutyrate (PHB) has excellent electron-withdrawing ability and biodegradability, but its stretching ability is poor, which limits its application in portable wearable devices. In this paper, the biocompatible poly­(lactide-co-caprolactone) (PLCL) was innovatively selected to modify the properties of the PHB electrospun membranes, and PHB/PLCL composite membranes with different contents of PLCL were constructed. Then, the expanded polytetrafluoroethylene (ePTFE) membranes and PHB/PLCL electrospun membranes were used as the friction layers to construct a flexible triboelectric nanogenerator (TENG). With the increase of PLCL contents, the elastic recovery rate of the composite membranes increased to 68% of tension at 40% strain. The toughness of the composite membrane was increased by 546%, which exhibits ultratoughness and stretchable properties. Based on the ultratoughness and high elasticity electrospun membranes with 50% PLCL, a stretchable and large deformation sensing device was made. The PHB/PLCL-ePTFE TENG could distinguish pingpong and badminton accurately, as well as their various postures such as forehand, backhand, smash poses, etc., which provided a new idea for large deformation monitoring of TENGs.

Flexible wearable intelligent sensing system for wheelchair sports monitoring

“… 39 , 40 It has been applied in the field of healthcare, human-computer interaction, intelligent motion prediction, and intelligent wearable devices. 41 , 42 …”

Continuous Fabrication of a Highly Integrated, User-Friendly, and Low-Cost Triboelectric Yarn/Fabric for Diverse Sensing Applications

“…With the continuous advancement of the Internet of Things, − energy-autonomous wearable electronics that can get rid of traditional batteries with limited lifetime cycles, frequent replacement, possible safety threats, and even environment-related risks are especially in demand. Triboelectric nanogenerators (TENGs), which operate via contact electrification and electrostatic induction, can convert ubiquitous and irregular low-frequency mechanical energy into electricity for achieving the self-sufficient trait of wearable electronics. − With the virtues of low price, environmental friendly, and easy availability, along with the wide range of material options, , TENGs have huge application prospects, including wearable powering, − multifunctional self-powered sensing, − personal healthcare monitoring, − and human–machine interactions. − In comparison to other existing wearable forms of carrying, attaching, embedding, etc., textiles can be an ideal for seamlessly integrating electrical capabilities without adding burden or sacrificing aesthetics, thus endowing a diverse design carrier for TENGs .…”