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Title: Enhancement of β-phase in PVDF films embedded with ferromagnetic Gd 5Si 4 nanoparticles for piezoelectric energy harvesting

Abstract

Self-polarized Gd5Si4-polyvinylidene fluoride (PVDF) nanocomposite films have been synthesized via a facile phase-inversion technique. For the 5 wt% Gd 5Si 4-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% Gd 5Si 4 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 CH 2 asymmetric and symmetric stretching vibrations in the FTIR. These results confirm the magnetic Gd 5Si 4 nanoparticles embedded in the PVDF membrane lead to an increased β-phase fraction, which paves the way for futuremore » efficient energy harvesting applications using a combination of magnetic and piezoelectric effects.« less

Authors:
 [1];  [1];  [2];  [1];  [3];  [4];  [2];  [2];  [1]
  1. Virginia Commonwealth Univ., Richmond, VA (United States)
  2. Univ. of Bolton, (United Kngdom)
  3. Ames Lab., Ames, IA (United States)
  4. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1349324
Alternate Identifier(s):
OSTI ID: 1368050; OSTI ID: 1421284
Report Number(s):
IS-J 9345
Journal ID: ISSN 2158-3226; AAIDBI
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Journal Article: Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Harstad, Shane, D’Souza, Noel, Soin, Navneet, El-Gendy, Ahmed A., Gupta, Shalabh, Pecharsky, Vitalij K., Shah, Tahir, Siores, Elias, and Hadimani, Ravi L. Enhancement of β-phase in PVDF films embedded with ferromagnetic Gd5Si4 nanoparticles for piezoelectric energy harvesting. United States: N. p., 2017. Web. doi:10.1063/1.4973596.
Harstad, Shane, D’Souza, Noel, Soin, Navneet, El-Gendy, Ahmed A., Gupta, Shalabh, Pecharsky, Vitalij K., Shah, Tahir, Siores, Elias, & Hadimani, Ravi L. Enhancement of β-phase in PVDF films embedded with ferromagnetic Gd5Si4 nanoparticles for piezoelectric energy harvesting. United States. doi:10.1063/1.4973596.
Harstad, Shane, D’Souza, Noel, Soin, Navneet, El-Gendy, Ahmed A., Gupta, Shalabh, Pecharsky, Vitalij K., Shah, Tahir, Siores, Elias, and Hadimani, Ravi L. Wed . "Enhancement of β-phase in PVDF films embedded with ferromagnetic Gd5Si4 nanoparticles for piezoelectric energy harvesting". United States. doi:10.1063/1.4973596.
@article{osti_1349324,
title = {Enhancement of β-phase in PVDF films embedded with ferromagnetic Gd5Si4 nanoparticles for piezoelectric energy harvesting},
author = {Harstad, Shane and D’Souza, Noel and Soin, Navneet and El-Gendy, Ahmed A. and Gupta, Shalabh and Pecharsky, Vitalij K. and Shah, Tahir and Siores, Elias and Hadimani, Ravi L.},
abstractNote = {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.},
doi = {10.1063/1.4973596},
journal = {AIP Advances},
number = 5,
volume = 7,
place = {United States},
year = {Wed Jan 04 00:00:00 EST 2017},
month = {Wed Jan 04 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4973596

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Cited by: 1 work
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