The effect of salt water ageing on the mechanical and rheological properties of magnetorheological elastomer.

Autor: Ahmad Khairi MH; Engineering Materials & Structures (eMast) ikhoza, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, 54100, Kuala Lumpur, Malaysia., Mazlan SA; Engineering Materials & Structures (eMast) ikhoza, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, 54100, Kuala Lumpur, Malaysia. amri.kl@utm.my., Ubaidillah U; Mechanical Engineering Department, Faculty of Engineering, Universitas Sebelas Maret, J1. Ir. Sutami 36A, Ketingan, Surakarta, 57126, Central Java, Indonesia. Ubaidillah_ft@staff.uns.ac.id., Khaidir REM; Engineering Materials & Structures (eMast) ikhoza, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, 54100, Kuala Lumpur, Malaysia., Nordin NA; Engineering Materials & Structures (eMast) ikhoza, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, 54100, Kuala Lumpur, Malaysia., Johari MAF; Engineering Materials & Structures (eMast) ikhoza, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, 54100, Kuala Lumpur, Malaysia., Abdul Aziz SA; Faculty of Applied Sciences, Universiti Teknologi MARA Pahang, 26400, Bandar Tun Abdul Razak Jengka, Malaysia., Shilan ST; Pusat Asasi Stem, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Malaysia., Choi SB; Department of Mechanical Engineering, The State University of New York, Korea (SUNY Korea), 119 Songdo Moonhwa-Ro, Yeonsu-Gu Incheon, Incheon, 21985, Republic of Korea.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Apr 10; Vol. 13 (1), pp. 5810. Date of Electronic Publication: 2023 Apr 10.
DOI: 10.1038/s41598-023-33171-6
Abstrakt: This paper aims to investigate the mechanical and rheological properties of magnetorheological elastomer (MRE) in marine ecosystems. The prepared samples comprised silicone rubber (SR) and 70 wt% micron-sized carbonyl iron particles (CIPs), immersed in an artificial marine ecosystem using salt water (Natrium Chloride) for 30 days. The mechanical properties of MRE samples were evaluated using hardness and quasi-static tensile tests. While the rheometer was used to investigate the rheological properties of their storage modulus condition with magnetic field stimulation. Further analysis of the defects and damages caused by salt water ageing was done through morphological observation using scanning electron microscope (SEM) technology. The results showed that the hardness and tensile strength of MRE samples that were soaked in salt water were affected over time. Lower values of hardness and tensile strength were obtained after 30 days due to the presence of Na + and Cl - , which acted as an accelerator to the hydrolyzation process of the MRE. The process then, enhanced the water ingress capability into the matrix to cause the molecular changes. Interestingly, for rheological properties, 30 days of salt water ageing allowed the water molecules to move the MRE matrix molecular chains apart, a process known as plasticization and thus increasing the MR effect. Furthermore, morphological evidence was established to determine the MRE changes during salt water ageing. The research findings should greatly contribute to a better understanding of the effect of salt water on the performance of MRE.
(© 2023. The Author(s).)
Databáze: MEDLINE
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