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Title: Open-cell poly(vinylidene fluoride) foams with polar phase for enhanced airborne sound absorption
Authors: Ayman Mahmoud Mohamed
Yao, Kui
Yasmin Mohamed Yousry
Chen, Shuting
Wang, Junling
Ramakrishna, Seeram
Keywords: DRNTU::Engineering::Materials
Acoustical Properties
Issue Date: 2018
Source: 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
Series/Report no.: Applied Physics Letters
Abstract: 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.
ISSN: 0003-6951
DOI: 10.1063/1.5048336
Schools: School of Materials Science & Engineering 
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).
Fulltext Permission: open
Fulltext Availability: With Fulltext
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