Fiber-based triboelectric generators for smart textiles using - PowerPoint PPT Presentation

Fiber-based triboelectric generators for smart textiles using surface-modified electrospun polymer fibres Tommaso Busolo, Daniel Ura, Sung Kyun Kim, Piotr Szewczyk, Mateusz M. Marzec,Andrzej Bernasik, Urszula Stachewicz, Sohini Kar-Narayan 12/11/2019 E-Textile 2019 Conference

Triboelectric generator Y. Zi et al. Triboelectric Nanogenerators, 2016

Electrospinning PMMA

PMMA+ and PMMA- fibers PMMA+ PMMA-  T. Busolo et al. Nano Energy. 57 (2018) 500 – 506

X-ray photoelectron spectroscopy (XPS) X-rays Electrons Photodetector 10 ° grazing angle PMMA fiber

Fibers surface chemistry - XPS C3 (%) C4 (%) O1 (%) O2 (%) PMMA+ 14.0 15.7 12.1 14.4 PMMA- 9.8 14.6 11.6 14.3 T. Busolo et al. Nano Energy. 57 (2018) 500 – 506

Kelvin Probe Force Microscopy (KPFM) 1 st scan – Topography 2 nd scan – Surface potential (Tapping AFM) (Lift scan) PMMA fiber PMMA fiber

Surface potential - KPFM T. Busolo et al. Nano Energy. 57 (2018) 500 – 506

Rubbing KPFM 1 st step – Rubbing 2 nd step – Surface potential (Contact AFM) (KPFM) CoCr coated Si tip PMMA fiber PMMA fiber

Charge transfer affinity - Rubbing KPFM T. Busolo et al. Nano Energy. 57 (2018) 500 – 506

Triboelectric performance PMMA+  PMMA-   T. Busolo et al. Nano Energy. 57 (2018) 500 – 506

Permanent surface modification PMMA- PMMA+ T. Busolo et al. Nano Energy. 57 (2018) 500 – 506

Tailoring PMMA on the triboelectric series Copper PMMA PMMA+ PMMA-

Conclusions • The triboelectric performance of electrospun PMMA fibers can be tailored by tuning the polarity of the applied voltage while electrospinning. • XPS, AFM and KPFM data correlate this result with surface chemistry modification of PMMA fibers during electrospinning. • 5 times higher triboelectric performance is achieved in electrospun PMMA- fibers due to their surface chemistry modification. • This fabrication method is applicable to other polymers to significantly increase their triboelectric output.

Acknowledgments Daniel Ura – AGH University of Science and Technology, Krakow Sung Kyun Kim – University of Cambridge Piotr Szewczyk – AGH University of Science and Technology, Krakow Mateusz M. Marzec – AGH University of Science and Technology, Krakow Andrzej Bernasik – AGH University of Science and Technology, Krakow Urszula Stachewicz – AGH University of Science and Technology, Krakow Sohini Kar-Narayan – University of Cambridge