Open Access
ARTICLE
Improving the Sound Absorption Properties of Flexible Polyurethane (PU) Foam using Nanofibers and Nanoparticles
Roohalah Hajizadeh1, Ali Khavanin2,*, Mohammad Barmar3, Ahmad Jonidi Jafari4, Somayeh Farhang Dehghan5
1 Department of Occupational Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
2 Department of Occupational Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
3 Department of Polyurethane, Iran Polymer and Petrochemical Institute, Tehran, Iran
4 Research Center for Environmental Health Technology, Department of Environmental Health Engineering, Iran University of Medical Sciences, Tehran, Iran
5 Department of Occupational Health and Safety at Work, Workplace Health Promotion Research Center, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
* Corresponding Author: Ali Khavanin. Email: .
Sound & Vibration 2019, 53(5), 207-222. https://doi.org/10.32604/sv.2019.06523
Abstract
Polyurethane foam as the most well-known absorbent materials has a
suitable absorption coefficient only within a limited frequency range. The aim
of this study was to improve the sound absorption coefficient of flexible polyurethane
(PU) foam within the range of various frequencies using clay nanoparticles,
polyacrylonitrile nanofibers, and polyvinylidene fluoride nanofibers. The
response surface method was used to determine the effect of addition of nanofi-
bers of PAN and PVDF, addition of clay nanoparticles, absorbent thickness,
and air gap on the sound absorption coefficient of flexible polyurethane foam
(PU) across different frequency ranges. The absorption coefficient of the samples
was measured using Impedance Tubes device. Nano clay at low thicknesses as
well as polyacrylonitrile nanofibers and polyvinyl fluoride nanofibers at higher
thicknesses had a greater positive effect on absorption coefficient. The mean
sound absorption coefficient in the composite with the highest absorption coeffi-
cient at middle and high frequencies was 0.798 and 0.75, respectively. In comparison
with pure polyurethane foam with the same thickness and air gap, these
values were 2.22 times at the middle frequencies and 1.47 times at high frequencies,
respectively. Surface porosity rose with increasing nano clay, but decreased
with increasing polyacrylonitrile nanofibers and polyvinyl fluoride nanofibers.
The results indicated that the absorption coefficient was elevated with increasing
the thickness and air gap. This study suggests that the use of a combination of
nanoparticles and nanofibers can enhance the acoustic properties of flexible polyurethane
foam.
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Cite This Article
APA Style
Hajizadeh, R., Khavanin, A., Barmar, M., Jafari, A.J., Dehghan, S.F. (2019). Improving the sound absorption properties of flexible polyurethane (PU) foam using nanofibers and nanoparticles. Sound & Vibration, 53(5), 207-222. https://doi.org/10.32604/sv.2019.06523
Vancouver Style
Hajizadeh R, Khavanin A, Barmar M, Jafari AJ, Dehghan SF. Improving the sound absorption properties of flexible polyurethane (PU) foam using nanofibers and nanoparticles. Sound Vib . 2019;53(5):207-222 https://doi.org/10.32604/sv.2019.06523
IEEE Style
R. Hajizadeh, A. Khavanin, M. Barmar, A.J. Jafari, and S.F. Dehghan "Improving the Sound Absorption Properties of Flexible Polyurethane (PU) Foam using Nanofibers and Nanoparticles," Sound Vib. , vol. 53, no. 5, pp. 207-222. 2019. https://doi.org/10.32604/sv.2019.06523
Citations