Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption
Open-cell nanocomposite foams of poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] and multi-walled carbon nanotubes (MWCNTs) were investigated for airborne sound absorption. When MWCNTs were well dispersed in the P(VDF-TrFE) matrix, the degree of crystallinity of the polar phase of the p...
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sg-ntu-dr.10356-1439992023-07-14T16:01:57Z Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption Ayman Mahmoud Mohamed Yao, Kui Yasmin Mohamed Yousry Wang, Junling Ramakrishna, Seeram School of Materials Science and Engineering Institute of Materials Research and Engineering, A*STAR Engineering::Materials Nanocomposite Foams Sound Absorption Open-cell nanocomposite foams of poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] and multi-walled carbon nanotubes (MWCNTs) were investigated for airborne sound absorption. When MWCNTs were well dispersed in the P(VDF-TrFE) matrix, the degree of crystallinity of the polar phase of the polymer was enhanced, and hence, the local piezoelectric effect and the electrical conductivity varied by nearly seven orders of magnitude dependent on the amount of MWCNT loading. The measurements in a standard acoustic tube showed that introduction of an appropriate amount of MWCNTs significantly enhanced the airborne sound absorption coefficient of P(VDF-TrFE) foam without poling, particularly in the lower and intermediate frequency range (below 2 kHz), which is attributed to the local piezoelectric effect in the polar polymer matrix and charge dissipation through the conductive MWCNT interfacing the polar phase. The experimental results and data analysis indicate that the open-cell nanocomposite foam with an optimal combination of local piezoelectric effect and electrical conductivity is promising for noise mitigation applications with enhanced passive airborne sound absorption. Agency for Science, Technology and Research (A*STAR) Ministry of National Development (MND) National Research Foundation (NRF) Singapore Maritime Institute (SMI) Published version 2020-10-07T05:42:04Z 2020-10-07T05:42:04Z 2020 Journal Article Ayman Mahmoud Mohamed, Kui, Y., Yasmin Mohamed Yousry, Wang, J., & Ramakrishna, S. (2020). Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption. Journal of Applied Physics, 127(21), 214102-. doi:10.1063/1.5140213 0021-8979 https://hdl.handle.net/10356/143999 10.1063/1.5140213 21 127 en Journal of Applied Physics © 2020 The Author(s). All rights reserved. This paper was published by AIP in Journal of Applied Physics and is made available with permission of The Author(s). application/pdf |
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Engineering::Materials Nanocomposite Foams Sound Absorption Ayman Mahmoud Mohamed Yao, Kui Yasmin Mohamed Yousry Wang, Junling Ramakrishna, Seeram Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption |
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Open-cell nanocomposite foams of poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] and multi-walled carbon nanotubes (MWCNTs) were investigated for airborne sound absorption. When MWCNTs were well dispersed in the P(VDF-TrFE) matrix, the degree of crystallinity of the polar phase of the polymer was enhanced, and hence, the local piezoelectric effect and the electrical conductivity varied by nearly seven orders of magnitude dependent on the amount of MWCNT loading. The measurements in a standard acoustic tube showed that introduction of an appropriate amount of MWCNTs significantly enhanced the airborne sound absorption coefficient of P(VDF-TrFE) foam without poling, particularly in the lower and intermediate frequency range (below 2 kHz), which is attributed to the local piezoelectric effect in the polar polymer matrix and charge dissipation through the conductive MWCNT interfacing the polar phase. The experimental results and data analysis indicate that the open-cell nanocomposite foam with an optimal combination of local piezoelectric effect and electrical conductivity is promising for noise mitigation applications with enhanced passive airborne sound absorption. |
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School of Materials Science and Engineering |
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School of Materials Science and Engineering Ayman Mahmoud Mohamed Yao, Kui Yasmin Mohamed Yousry Wang, Junling Ramakrishna, Seeram |
format |
Article |
author |
Ayman Mahmoud Mohamed Yao, Kui Yasmin Mohamed Yousry Wang, Junling Ramakrishna, Seeram |
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Ayman Mahmoud Mohamed |
title |
Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption |
title_short |
Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption |
title_full |
Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption |
title_fullStr |
Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption |
title_full_unstemmed |
Open-cell P(VDF-TrFE)/MWCNT nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption |
title_sort |
open-cell p(vdf-trfe)/mwcnt nanocomposite foams with local piezoelectric and conductive effects for passive airborne sound absorption |
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2020 |
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https://hdl.handle.net/10356/143999 |
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1773551256534515712 |