Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam

Muhazeli, Noor Sahirah; Nordin, Nur Azmah; Ubaidillah, Ubaid; Mazlan, Saiful Amri; Abdul Aziz, Siti Aishah; Nazmi, Nurhazimah; Yahya, Iwan

doi:10.3390/ma13245637

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Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam

Noor Sahirah Muhazeli

Nur Azmah Nordin

^1,*,

Ubaid Ubaidillah

^2,*

Saiful Amri Mazlan

^1,3

Siti Aishah Abdul Aziz

Nurhazimah Nazmi

and

Iwan Yahya

⁴

Engineering Materials and Structures (eMast), Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, Kampung Datuk Keramat, Kuala Lumpur 54100, Malaysia

Mechanical Engineering Department, Universitas Sebelas Maret, J1. Ir. Sutami 36A, Kentingan, Surakarta 57126, Indonesia

International Center, Tokyo City University, 1 Chome-28-1 Tamazutsumi, Setagaya, Tokyo 158-0087, Japan

⁴

Department of Physics, Universitas Sebelas Maret, J1. Ir. Sutami 36A, Kentingan, Surakarta 57126, Indonesia

Authors to whom correspondence should be addressed.

Materials 2020, 13(24), 5637; https://doi.org/10.3390/ma13245637

Received: 16 November 2020 / Revised: 5 December 2020 / Accepted: 7 December 2020 / Published: 10 December 2020

(This article belongs to the Section Smart Materials)

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Abstract

Conventional polyurethane foam has non-tunable sound absorption properties. Here, a magneto-induced foam, called magnetorheological (MR) foam, was fabricated with the feature of being able to tune sound absorption properties, primarily from the middle- to higher-frequency ranges. Three different samples of MR foams were fabricated in situ by varying the concentration of Carbonyl Iron Particles (CIPs) (0, 35, and 75 wt.%). The magnetization properties and tunable sound absorption characteristics were evaluated. From the magnetic saturation properties, the results showed very narrow and small coercivity of hysteresis loops relative to the soft magnetic properties of the CIPs. MR foam with 75 wt.% CIPs showed a higher magnetic saturation at 91.350 emu/g compared to MR foam with 35 wt.% CIPs at 63.896 emu/g. For tunable sound absorption testing, the effect of ‘shifting’ to higher frequency was also observed when the magnetic field was applied, which was ~10 Hz for MR foam with 35 wt.% CIPs and ~130 Hz for MR foam with 75 wt.% CIPs. As the latest evolution of semi-active noise control materials, the results from this study are valuable guidance for the advancement of MR-based devices. View Full-Text

Keywords: magnetorheological materials; magnetic foam; magnetic saturation; in situ; sound absorption

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MDPI and ACS Style

Muhazeli, N.S.; Nordin, N.A.; Ubaidillah, U.; Mazlan, S.A.; Abdul Aziz, S.A.; Nazmi, N.; Yahya, I. Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam. Materials 2020, 13, 5637. https://doi.org/10.3390/ma13245637

AMA Style

Muhazeli NS, Nordin NA, Ubaidillah U, Mazlan SA, Abdul Aziz SA, Nazmi N, Yahya I. Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam. Materials. 2020; 13(24):5637. https://doi.org/10.3390/ma13245637

Chicago/Turabian Style

Muhazeli, Noor S., Nur A. Nordin, Ubaid Ubaidillah, Saiful A. Mazlan, Siti A. Abdul Aziz, Nurhazimah Nazmi, and Iwan Yahya. 2020. "Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam" Materials 13, no. 24: 5637. https://doi.org/10.3390/ma13245637

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Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam

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