Composition-structure coupling reinforcement to engineer stretchable and conductive composite nanofibrous helix with fully wrapped structure for green fiber electronics

Abstract

Emerging fiber electronics have shown great potential in various fields owing to their integration of unique fiber components and advanced electronics. With the increasing environmental pollution caused by electronic waste, the demand for green electronic is increasing. Meanwhile, how to balance and improve the stable conductivity and stretchability simultaneously remains challenging due to the intrinsic counteraction. Herein, based on composition-structure coupling reinforcement strategy, a super-stretchable, highly conductive and green composite nanofibrous helix was prepared by conjugate electrospinning and one-step twisting. Through the blend of ductile composition, the mechanical properties are improved without sacrificing green properties. By designing a fully wrapped helical structure, the conductivity and stretchability are improved simultaneously enabling it works well without failure especially at large strains. As we demonstrated, compared with SF and membrane, the composite nanofibrous helix show great advantages in green fiber electronic devices, such as stretchable conductor for light-controlled safety protection switch and stable sensor for human motion monitoring.