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Article

Sensitivities of Rheological Properties of Magnetoactive Foam for Soft Sensor Technology

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Engineering Materials and Structures (eMast) iKohza, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur 54100, Malaysia
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International Center, Tokyo City University, 1 Chrome-28-1 Tamazutmi, Setagaya, Tokyo 1580087, Japan
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Faculty of Engineering, Universitas Sebelas Maret, Jalan Ir. Sutami 36A, Kentingan, Surakarta 57126, Central Java, Indonesia
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Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida T. Bati 5678, 760 01 Zlín, Czech Republic
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Disaster Preparedness & Prevention Centre (DPPC), Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur 54100, Malaysia
*
Authors to whom correspondence should be addressed.
Academic Editor: Sung Hoon Kang
Sensors 2021, 21(5), 1660; https://doi.org/10.3390/s21051660
Received: 18 January 2021 / Revised: 17 February 2021 / Accepted: 23 February 2021 / Published: 28 February 2021
(This article belongs to the Special Issue Soft Composite-Based Sensors)
Magnetoactive (MA) foam, with its tunable mechanical properties and magnetostriction, has the potential to be used for the development of soft sensor technology. However, researchers have found that its mechanical properties and magnetostriction are morphologically dependent, thereby limiting its capabilities for dexterous manipulation. Thus, in this work, MA foam was developed with additional capabilities for controlling its magnetostriction, normal force, storage modulus, shear stress and torque by manipulating the concentration of carbonyl iron particles (CIPs) and the magnetic field with regard to morphological changes. MA foams were prepared with three weight percentages of CIPs, namely, 35 wt.%, 55 wt.% and 75 wt.%, and three different modes, namely, zero shear, constant shear and various shears. The results showed that the MA foam with 75 wt.% of CIPs enhanced the normal force sensitivity and positive magnetostriction sensitivity by up to 97% and 85%, respectively. Moreover, the sensitivities of the storage modulus, torque and shear stress were 8.97 Pa/mT, 0.021 µN/mT, and 0.0096 Pa/mT, respectively. Meanwhile, the magnetic dipolar interaction between the CIPs was capable of changing the property of MA foam from a positive to a negative magnetostriction under various shear strains with a low loss of energy. Therefore, it is believed that this kind of highly sensitive MA foam can potentially be implemented in future soft sensor systems. View Full-Text
Keywords: magnetostriction; normal force; porous polymer; magnetic dipolar interaction magnetostriction; normal force; porous polymer; magnetic dipolar interaction
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MDPI and ACS Style

Norhaniza, R.; Mazlan, S.A.; Ubaidillah, U.; Sedlacik, M.; Aziz, S.A.A.; Nazmi, N.; Homma, K.; Rambat, S. Sensitivities of Rheological Properties of Magnetoactive Foam for Soft Sensor Technology. Sensors 2021, 21, 1660. https://doi.org/10.3390/s21051660

AMA Style

Norhaniza R, Mazlan SA, Ubaidillah U, Sedlacik M, Aziz SAA, Nazmi N, Homma K, Rambat S. Sensitivities of Rheological Properties of Magnetoactive Foam for Soft Sensor Technology. Sensors. 2021; 21(5):1660. https://doi.org/10.3390/s21051660

Chicago/Turabian Style

Norhaniza, Rizuan, Saiful A. Mazlan, Ubaidillah Ubaidillah, Michal Sedlacik, Siti A.A. Aziz, Nurhazimah Nazmi, Koji Homma, and Shuib Rambat. 2021. "Sensitivities of Rheological Properties of Magnetoactive Foam for Soft Sensor Technology" Sensors 21, no. 5: 1660. https://doi.org/10.3390/s21051660

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