Enhanced Performance and Fabrication of Pvdf Nanofiber-Coated Yarn for Advanced Piezoelectric Nanogenerators in Microelectronics

Piezoelectric nanogenerators are attracting attention of researchers due to their potential for use in microelectronics, a field witnessing rapid technological development. In this study, Polyvinylidene fluoride (PVDF) nanofiber (NF)-coated cotton yarns in a core-shell structure, along with neat PVDF NF yarns, were produced using the electrospinning technique. Additionally, a plain woven-fabric structure was created on a handloom. Piezoelectric, mechanical, and morphological analyses were conducted on the yarns, and the obtained results were compared. The maximum power densities of fabrics derived from the core-shell and neat PVDF nanofiber yarns were measured as 11.36 µW/cm2 and 111.19 µW/cm2, respectively. The core-shell NF yarn exhibited higher strength, aided by the presence of cotton yarn in the core, compared to neat PVDF NF yarn. Moreover, in the core-shell NF yarn, the presence of coated PVDF nanofibers enhanced the yarn's elongation, benefiting from the high elongation property of the nanofibers.