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Type: Journal article
Title: Graphene oxide-based lamella network for enhanced sound absorption
Author: Nine, M.J.
Ayub, M.
Zander, A.C.
Tran, D.
Cazzolato, B.S.
Losic, D.
Citation: Advanced Functional Materials, 2017; 27(46):1703820--1703820-10
Publisher: Wiley
Issue Date: 2017
ISSN: 1616-3028
Statement of
Md Julker Nine, Md Ayub, Anthony C. Zander, Diana N. H. Tran, Benjamin S. Cazzolato and Dusan Losic
Abstract: Noise is an environmental pollutant with recognized impacts on the psychological and physiological health of humans. Many porous materials are often limited by low sound absorption over a broad frequency range, delicacy, excessive weight and thickness, poor moisture insulation, high temperature instability, and lack of readiness for high volume commercialization. Herein, an efficient and robust lamella-structure is reported as an acoustic absorber based on self-assembled interconnected graphene oxide (GO) sheets supported by a grill-shaped melamine skeleton. The fabricated lamella structure exhibits ≈60.3% enhancement over a broad absorption band between 128 and 4000 Hz (≈100% at lower frequencies) compared to the melamine foam. The enhanced acoustic absorption is identified to be structure dependent regardless of the density. The sound dissipation in the open-celled structure is due to the viscous and thermal losses, whereas it is predominantly tortuosity in wave propagation and enhanced surface area for the GO-based lamella. In addition to the enhanced acoustic absorption and mechanical robustness, the lamella provides superior structural functionality over many conventional sound absorbers including, moisture/mist insulation and fire retardancy. The fabrication of this new sound absorber is inexpensive, scalable and can be adapted for extensive applications in commercial, residential, and industrial building structures.
Keywords: Acoustic absorption; fire-retardant; graphene oxide; lamella; moisture insulation
Description: Published online October 23, 2017
Rights: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI: 10.1002/adfm.201703820
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