dc.contributor.authorAyman Mahmoud Mohamed
dc.contributor.authorYao, Kui
dc.contributor.authorYasmin Mohamed Yousry
dc.contributor.authorChen, Shuting
dc.contributor.authorWang, Junling
dc.contributor.authorRamakrishna, Seeram
dc.identifier.citationAyman 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:10.1063/1.5048336en_US
dc.description.abstractOpen-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.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipASTAR (Agency for Sci., Tech. and Research, S’pore)en_US
dc.format.extent4 p.en_US
dc.relation.ispartofseriesApplied Physics Lettersen_US
dc.rights© 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).en_US
dc.subjectAcoustical Propertiesen_US
dc.titleOpen-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorptionen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.description.versionPublished versionen_US

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