Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption

Open-cell foams of polyvinylidene fluoride (PVDF) homopolymer were fabricated with the content of polar phase being changed by thermal treatment, and their airborne acoustic absorption performance properties were measured comparably in an acoustic tube. The experimental results showed that the sampl...

Full description

Saved in:
Bibliographic Details
Main Authors: Ayman Mahmoud Mohamed, Yao, Kui, Yasmin Mohamed Yousry, Chen, Shuting, Wang, Junling, Ramakrishna, Seeram
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2019
Subjects:
Online Access:https://hdl.handle.net/10356/82997
http://hdl.handle.net/10220/47559
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-82997
record_format dspace
spelling sg-ntu-dr.10356-829972023-07-14T15:50:23Z Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption Ayman Mahmoud Mohamed Yao, Kui Yasmin Mohamed Yousry Chen, Shuting Wang, Junling Ramakrishna, Seeram School of Materials Science & Engineering DRNTU::Engineering::Materials Piezoelectricity Acoustical Properties Open-cell foams of polyvinylidene fluoride (PVDF) homopolymer were fabricated with the content of polar phase being changed by thermal treatment, and their airborne acoustic absorption performance properties were measured comparably in an acoustic tube. The experimental results showed that the sample with the more polar phase and hence a stronger local piezoelectric effect exhibited a significantly larger acoustic absorption coefficient. In addition to the conventional visco-inertial, thermal and materials damping effects, our analysis indicated that the thin and polar struts of PVDF foams with the polar phase and the local piezoelectric effect may further enhance the mechanical damping by converting the excited mechanical vibration to electricity through the local piezoelectric effect and increasing the friction and viscous loss at the fluid-solid interface in the presence of electrical charges. The open-cell polymer foams with high content of the polar phase and the local piezoelectric effect have great potential for passive airborne noise mitigation applications. NRF (Natl Research Foundation, S’pore) ASTAR (Agency for Sci., Tech. and Research, S’pore) Published version 2019-01-25T03:27:29Z 2019-12-06T15:09:56Z 2019-01-25T03:27:29Z 2019-12-06T15:09:56Z 2018 Journal Article Ayman Mahmoud Mohamed, Yao, K., Yasmin Mohamed Yousry, Chen, S., Wang, J., & Ramakrishna, S. (2018). Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption. Applied Physics Letters, 113(9), 092903-. doi:10.1063/1.5048336 0003-6951 https://hdl.handle.net/10356/82997 http://hdl.handle.net/10220/47559 10.1063/1.5048336 en Applied Physics Letters © 2018 The Author(s). All rights reserved. This paper was published by AIP in Applied Physics Letters and is made available with permission of The Author(s). 4 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
Piezoelectricity
Acoustical Properties
spellingShingle DRNTU::Engineering::Materials
Piezoelectricity
Acoustical Properties
Ayman Mahmoud Mohamed
Yao, Kui
Yasmin Mohamed Yousry
Chen, Shuting
Wang, Junling
Ramakrishna, Seeram
Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption
description Open-cell foams of polyvinylidene fluoride (PVDF) homopolymer were fabricated with the content of polar phase being changed by thermal treatment, and their airborne acoustic absorption performance properties were measured comparably in an acoustic tube. The experimental results showed that the sample with the more polar phase and hence a stronger local piezoelectric effect exhibited a significantly larger acoustic absorption coefficient. In addition to the conventional visco-inertial, thermal and materials damping effects, our analysis indicated that the thin and polar struts of PVDF foams with the polar phase and the local piezoelectric effect may further enhance the mechanical damping by converting the excited mechanical vibration to electricity through the local piezoelectric effect and increasing the friction and viscous loss at the fluid-solid interface in the presence of electrical charges. The open-cell polymer foams with high content of the polar phase and the local piezoelectric effect have great potential for passive airborne noise mitigation applications.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Ayman Mahmoud Mohamed
Yao, Kui
Yasmin Mohamed Yousry
Chen, Shuting
Wang, Junling
Ramakrishna, Seeram
format Article
author Ayman Mahmoud Mohamed
Yao, Kui
Yasmin Mohamed Yousry
Chen, Shuting
Wang, Junling
Ramakrishna, Seeram
author_sort Ayman Mahmoud Mohamed
title Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption
title_short Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption
title_full Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption
title_fullStr Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption
title_full_unstemmed Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption
title_sort open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption
publishDate 2019
url https://hdl.handle.net/10356/82997
http://hdl.handle.net/10220/47559
_version_ 1772825583192899584