Highly stretchable nanofiber-coated hybrid yarn with wavy structure fabricated by novel airflow-electrospinning method

Nanofiber-coated hybrid yarn not only exhibited the performance advantages of coating nanofiber-layer, but also possessed the structural feature of core layer, which could endow it excellent application prospect. Previous studies for fabricating nanofiber-coated hybrid yarn had limitations of poor yarn structure and discontinuity, and obtained hybrid yarns with a small strain. Herein, a novel stepped airflow-electrospinning method, in which stepped airflow field could effectively control the movement of nanofibers, was proposed to spin continuous nanofiber-coated hybrid yarn. Interestingly, a highly stretchable nanofiber-coated hybrid yarn with uniform wavy structure was obtained by our designed method, achieving an ultra-high strain of 531.98%.