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...
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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 |
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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 |
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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. |
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School of Materials Science & Engineering |
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School of Materials Science & Engineering Ayman Mahmoud Mohamed Yao, Kui Yasmin Mohamed Yousry Chen, Shuting Wang, Junling Ramakrishna, Seeram |
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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 |
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https://hdl.handle.net/10356/82997 http://hdl.handle.net/10220/47559 |
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1772825583192899584 |