Theoretical Model and Outstanding Performance from Constructive Piezoelectric and Triboelectric Mechanism in Electrospun PVDF Fiber Film

Theoretical Model and Outstanding Performance from Constructive Piezoelectric and Triboelectric Mechanism in Electrospun PVDF Fiber Film
Title:
Theoretical Model and Outstanding Performance from Constructive Piezoelectric and Triboelectric Mechanism in Electrospun PVDF Fiber Film
Other Titles:
Advanced Functional Materials
Publication Date:
01 June 2020
Citation:
Yasmin Mohamed Yousry, Kui Yao, Ayman Mahmoud Mohamed, Weng Heng Liew, Shuting Chen, and Seeram Ramakrishna, “Theoretical Model and Outstanding Performance from Constructive Piezoelectric and Triboelectric Mechanism in Electrospun PVDF Fiber Film,” Advanced Functional Materials, doi.org/10.1002/adfm.201910592, online on 30 April 2020; Vol. 30, No. 25, 18 June 2020,1910592 (1 of 9).
Abstract:
Flexible materials with high electromechanical coupling performance are highly demanded for wide applications for electromechanical sensors and transducers including mechanical energy harvesters. Here outstanding electromechanical performance is obtained in electrospun aligned PVDF fiber film. A theoretical model is developed from systematic theoretical analyses to clarify the underlying constructive piezoelectric-triboelectric mechanism in the polarized PVDF fiber films that well explain the experimental observations. The electrospinning process induces polarization alignment and thus tunes the electron affinity for PVDF fibers with different polarization terminals, which results in the constructive piezoelectric and triboelectric responses in the obtained PVDF fiber films. Extremely large effective piezoelectric performance properties are achieved in the direct piezoelectric measurements, reaching the maximum effective piezoelectric strain and voltage coefficients of -1065 pm V-1, and -9178 V mm N-1, respectively, at 100 Hz. In the converse piezoelectric measurements without as significant contribution from reversible triboelectric effect, the maximum effective piezoelectric strain and voltage coefficients are -166 pm V-1 and -1499 V mm N-1, respectively. Our theoretical analyses and experimental results show the great potential of the electrospun aligned polar PVDF fiber material for various electromechanical device applications, particularly for mechanical energy harvesting.
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Funding Info:
The authors acknowledge the research grant support in part by Singapore Maritime Institute under the Maritime Sustainability R&D Programme, Project ID: SMI-2015-MA-07 (SC25/16-7P1125). The authors from IMRE acknowledge the support from the National Research Foundation Competitive Research Programme of Singapore, NRF-CRP15-2015-04, (IMRE/16-9P1122).
Description:
"This is the peer reviewed version of the following article: [Yasmin Mohamed Yousry, Kui Yao, Ayman Mahmoud Mohamed, Weng Heng Liew, Shuting Chen, and Seeram Ramakrishna, “Theoretical Model and Outstanding Performance from Constructive Piezoelectric and Triboelectric Mechanism in Electrospun PVDF Fiber Film,” Advanced Functional Materials, Vol. 30, No. 25, 18 June 2020,1910592 (1 of 9).], which has been published in final form at [doi.org/10.1002/adfm.201910592]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions."
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