Enhanced Piezoelectric Performance of Electrospun Pvdf-Trfe by Polydopamine-Assisted Attachment of Zno Nanowires for Impact Force Sensing

35 Pages Posted: 18 May 2022

See all articles by Michael Chung

Michael Chung

affiliation not provided to SSRN

Francisco J. Diaz Sanchez

affiliation not provided to SSRN

Jean Schoeller

affiliation not provided to SSRN

Rolf Stämpfli

affiliation not provided to SSRN

René M. ROSSI

affiliation not provided to SSRN

Norbert Radacsi

affiliation not provided to SSRN

Abstract

In this work, piezoelectric PVDF-TrFE electrospun fibers (EFs) were fabricated using a high-throughput nozzle-free electrospinning process. ZnO nanoparticles were robustly anchored to the PVDF-TrFE EFs, assisted by a self-polymerized polydopamine (PDA) layer, and subsequently grown into ZnO nanowires (NWs) using a low-temperature hydrothermal growth method. The electrospun fibrous mats were investigated for active impact force transduction and the piezoelectric voltage outputs of different combinations of PVDF-TrFE and ZnO nanomaterials were compared using two different impact force testing setups. The first impact force test, using consistent horizontal impacts of 2.6 ± 1.0 N at 3.6 Hz with a resistive load of 15.1 MΩ, saw an increase in force sensitivity by a factor of 2.5 for the nanowires (25.0 ± 3.5 V/N) compared to 9.8 ± 2.2 V/N for the unmodified PVDF-TrFE EFs. Similarly, vertical drop impact testing demonstrated a 5.8-fold increase from 11.0 mV/N to 63.9 mV/N in sensitivity with a linear response (R2 = 0.986) for a large range of impact forces up to 970 N (load = 1 MΩ). The ZnO-modified PVDF-TrFE EFs were also tested as a wearable impact force sensor to quantify soccer ball heading force, which was measured as 291.3 ± 51.0 N for a vertical ball speed of 7.8 ± 1.5 ms-1 with an 8.2% average error compared to theoretical force values. It is believed the enhanced piezoelectric performance of these materials, facilitated by the high proportion of polar β-phase crystallinity in PVDF-TrFE EFs and electron transfer layer provided by PDA, could provide a useful platform for wearable sensing and energy harvesting.

Keywords: Electrospinning, piezoelectric, impact force, wearable sensor, polydopamine, Nanomaterials

Suggested Citation

Chung, Michael and Diaz Sanchez, Francisco J. and Schoeller, Jean and Stämpfli, Rolf and ROSSI, René M. and Radacsi, Norbert, Enhanced Piezoelectric Performance of Electrospun Pvdf-Trfe by Polydopamine-Assisted Attachment of Zno Nanowires for Impact Force Sensing. Available at SSRN: https://ssrn.com/abstract=4113140 or http://dx.doi.org/10.2139/ssrn.4113140

Michael Chung

affiliation not provided to SSRN ( email )

No Address Available

Francisco J. Diaz Sanchez

affiliation not provided to SSRN ( email )

No Address Available

Jean Schoeller

affiliation not provided to SSRN ( email )

No Address Available

Rolf Stämpfli

affiliation not provided to SSRN ( email )

No Address Available

René M. ROSSI

affiliation not provided to SSRN ( email )

No Address Available

Norbert Radacsi (Contact Author)

affiliation not provided to SSRN ( email )

No Address Available

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