Temperature-Dependent Viscoelastic Response of Magnetorheological Grease with Varying Particle Shapes

Open Access

Year : 2025 | Volume : 13 | Issue : 06 | Page : 139 147
    By

    Nur Adilah Adanan,

  • Abdul Yasser Abd Fatah,

  • Nur Azmah Nordin,

  • Saiful Amri Mazlan,

  • Siti Maisarah Ahmad Tarmizi,

  • Rehnupreya Hentry Viension,

  • Khairul Anwar Abdul Kadir,

  1. Postgraduate Student, Department of Smart Engineering and Advanced Technology (SEAT), Faculty of Artificial Intelligence (FAI), University Technology Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur, , Malaysia
  2. Senior Lecturer, Department of Smart Engineering and Advanced Technology (SEAT), Faculty of Artificial Intelligence (FAI), University Technology Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur, , Malaysia
  3. Senior Lecturer, Department of Engineering Materials and Structures (EMAST) IKOHZA, Malaysia-Japan International Institute of Technology (MJIIT), University Technology Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur, , Malaysia
  4. Professor, Department of Engineering Materials and Structures (EMAST) IKOHZA, Malaysia-Japan International Institute of Technology (MJIIT), University Technology Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur, , Malaysia
  5. Ph. D, Department of Engineering Materials and Structures (EMAST) IKOHZA, Malaysia-Japan International Institute of Technology (MJIIT), University Technology Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur, , Malaysia
  6. Postgraduate Student, Department of Engineering Materials and Structures (EMAST) IKOHZA, Malaysia-Japan International Institute of Technology (MJIIT), University Technology Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur, , Malaysia
  7. Postgraduate Student, Department of Engineering Materials and Structures (EMAST) IKOHZA, Malaysia-Japan International Institute of Technology (MJIIT), University Technology Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur, , Malaysia

Abstract

This study examines the effect of temperatures on the magnetic and rheological properties of magnetorheological greases (MRGs) comprised of different particle shapes, under oscillatory shear mode test. Two samples were prepared with 70 wt.% flake-shaped electrolytic iron particles (EIP) and spherical carbonyl iron particles (CIP) which dispersed in 30 wt.% lithium-based grease, separately. Respective to magnetic properties test, the vibrating sample magnetometry (VSM) revealed that MRG-EIP exhibited 11.4% higher magnetic saturation (Ms), 94.4% higher remanent magnetization (Mr), and 89.1% greater coercivity (Hc) compared to MRG-CIP. These enhancements are attributed to the larger surface area and anisotropic shape of the EIP particles. Meanwhile, under strain sweep tests at 25°C, 45°C, and 65°C, at without (0 T) and with magnetic field of 0.59 T, the linear viscoelastic (LVE) region for both samples display different behaviour. At 25°C, the MRG-CIP possess a wider LVE region, with a limit at 0.0482% strain compared to the MRG-EIP which is limited to 0.0261% strain. Nevertheless, under 0.59 T, both samples exhibited the similar LVE limit, around 0.068% strain due to the magnetization effect experienced by both particles. Albeit being similar in LVE limit, the capability of both MRGs to store modulus (G’) at given strains are different, respective to the role of different particle shapes in the grease medium. Despite this, MRG-EIP exhibited a consistent increased in storage modulus at all temperatures, in contrast to the decrement in storage modulus observed in MRG-CIP sample. These results demonstrate that the flake-shaped of EIP improve the thermal and mechanical stability of MRG, offering the enhanced performance for magnetorheological devices that would be operating under variable temperature conditions.

Keywords: Carbonyl iron particles, electrolytic iron particles, linear viscoelastic, magnetic properties, magnetorheological grease, storage modulus, temperatures

[This article belongs to Journal of Polymer and Composites ]

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How to cite this article:
Nur Adilah Adanan, Abdul Yasser Abd Fatah, Nur Azmah Nordin, Saiful Amri Mazlan, Siti Maisarah Ahmad Tarmizi, Rehnupreya Hentry Viension, Khairul Anwar Abdul Kadir. Temperature-Dependent Viscoelastic Response of Magnetorheological Grease with Varying Particle Shapes. Journal of Polymer and Composites. 2025; 13(06):139-147.
How to cite this URL:
Nur Adilah Adanan, Abdul Yasser Abd Fatah, Nur Azmah Nordin, Saiful Amri Mazlan, Siti Maisarah Ahmad Tarmizi, Rehnupreya Hentry Viension, Khairul Anwar Abdul Kadir. Temperature-Dependent Viscoelastic Response of Magnetorheological Grease with Varying Particle Shapes. Journal of Polymer and Composites. 2025; 13(06):139-147. Available from: https://journals.stmjournals.com/jopc/article=2025/view=230709


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Regular Issue Open Access Original Research
Volume 13
Issue 06
Received 26/08/2025
Accepted 05/09/2025
Published 20/10/2025
Publication Time 55 Days
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