Enhancement of đťś·-phase in PVDF films embedded with ferromagnetic Gd5Si4 nanoparticles for piezoelectric energy harvesting
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, USA
- Institute of Renewable Energy & Environment Technology, University of Bolton, Deane Road, Bolton BL3 5AB, United Kingdom
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, USA, Nanotechnology and Nanometrology Laboratory, National Institute for Standards (NIS), Giza 12211, Egypt
- Division of Materials Science and Engineering, Ames Laboratory, US Dept. of Energy, Ames, Iowa 50011-3020, USA
- Division of Materials Science and Engineering, Ames Laboratory, US Dept. of Energy, Ames, Iowa 50011-3020, USA, Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-2030, USA
Self-polarized Gd5Si4-polyvinylidene fluoride (PVDF) nanocomposite films have been synthesized via a facile phase-inversion technique. For the 5 wt% Gd5Si4-PVDF films, the enhancement of the piezoelectric β-phase and crystallinity are confirmed using Fourier transform infrared (FTIR) spectroscopy (phase fraction, FβFβ, of 81% as compared to 49% for pristine PVDF) and differential scanning calorimetry (crystallinity, ΔXcΔXc, of 58% as compared to 46% for pristine PVDF), respectively. The Gd5Si4 magnetic nanoparticles, prepared using high-energy ball milling were characterized using Dynamic Light Scattering and Vibrating Sample Magnetometry (VSM) to reveal a particle size of ~470 nm with a high magnetization of 11 emu/g. The VSM analysis of free-standing Gd5Si4-PVDF films revealed that while the pristine PVDF membrane shows weak diamagnetic behavior, the Gd5Si4-PVDF films loaded at 2.5 wt% and 5 wt% Gd5Si4 show enhanced ferromagnetic behavior with paramagnetic contribution from Gd5Si3 phase. The interfacial interactions between Gd5Si4 and PVDF results in the preferential crystallization of the β-phase as confirmed via the shift in the CH2 asymmetric and symmetric stretching vibrations in the FTIR. These results confirm the magnetic Gd5Si4 nanoparticles embedded in the PVDF membrane lead to an increased β-phase fraction, which paves the way for future efficient energy harvesting applications using a combination of magnetic and piezoelectric effects.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1349324
- Alternate ID(s):
- OSTI ID: 1368050; OSTI ID: 1421284
- Report Number(s):
- IS-J 9345; AAIDBI; 10.1063/1.4973596
- Journal Information:
- AIP Advances, Journal Name: AIP Advances Vol. 7 Journal Issue: 5; ISSN 2158-3226
- Publisher:
- American Institute of PhysicsCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Multicaloric effect in a multiferroic composite of Gd5(Si,Ge)4 microparticles embedded into a ferroelectric PVDF matrix
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journal | December 2019 |
Differential effect of magnetic alignment on additive manufacturing of magnetocaloric particles
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journal | January 2020 |
Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles
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journal | May 2018 |
Gd 5 Si 4 -PVDF nanocomposite films and their potential for triboelectric energy harvesting applications
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journal | March 2019 |
Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4
|
journal | July 2019 |
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