Physical and dynamic characterization of biodegradable oil-based magnetorheological fluid

This study, provides a comprehensive characterization of biodegradable oil-based magnetorheological fluid (MRF), focusing on its formulation, physical properties, and dynamic behaviour. It has emphasised the importance of using biodegradable oils like Karanja oil and Castor oil for enhanced sustainability and environmental safety. Characterization of MRFs is essential for optimizing their performance in dynamic systems. The physical characterization focused on morphology, sedimentation, and Fourier Transform Infrared Spectroscopy (FTIR) analyses. However, the dynamic characterization incorporates the rheological performance across varied conditions such as strain amplitude, frequency of excitation, temperature, and magnetic field. Sedimentation analysis reveals the superior stability of Carbonyl iron (CI) based MRFs, exhibiting a low sedimentation rate of 1.6% compared to Electrolytic iron (EI) based MRFs of 27% due to its morphological structure. Castor oil with an EI-based sample shows the highest damping capabilities among the MRF samples. The storage modulus increases with the increase in frequency; however, it reduces with the increase in temperature. This research underscores the potential of biodegradable oil-based MRFs with promising rheological properties for vibration attenuation of the dynamic system.