Comparative Study on Mechanical and Magnetic Properties of Porous and Nonporous Film-shaped Magnetorheological Nanocomposites Based on Silicone Rubber
Aref Naimzad1, Yousef Hojjat2, Mojtaba Ghodsi3
1Aref Naimzad, PhD Student, Manufacturing Department, Mechanical Engineering Faculty, Tarbiat Modares University, Tehran, Iran.
2Dr. Yousef Hojjat, Associate Professor, Manufacturing Department, Mechanical Engineering Faculty, Tarbiat Modares University, Tehran, Iran.
3Dr. MojtabaGhodsi, Assistant Professor, Manufacturing Department, Mechanical Engineering Faculty, Tarbiat Modares University, Tehran, Iran.
Manuscript received on July 05, 2014. | Revised Manuscript received on July 11, 2014. | Manuscript published on July 15, 2014. | PP: 11-20 | Volume-2, Issue-8, July 2014. | Retrieval Number: H0690072814/2014©BEIESP
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©The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper presents a comparative study on mechanical and magnetic properties of two sets, each including five samples of film-shaped magnetorheological nanocomposites (MRNCs) based on RTV silicone rubber and nano-sized carbonyl iron particles (CIPs). One set of sample was prepared by polymerization of silicone rubber with CIPs and silicone oil, while the other set obtained by filling the ammonium bicarbonate (NH4HC3), CIPs and silicone oils. Both set of samples were manufactured under isotropic condition and their microstructures was characterized by XRD and EFSEM. Porosity characteristics was measured by displacement method and porosity image analysis was applied using ImageJ and Origin Pro Software. The mechanical tensile tests was conducted using Gotech tensile strength tester and the density of samples was observed experimentally and estimated theoretically. The magnetic properties of MRNCs were practically determined using VSM test. Plateau stress induced by the applied magnetics fields and MR effects was determined. Through fabrication of film-shaped MRNCs, the samples deflections was measured against applied magnetic fields .The comparative investigation results show that porosity improve the mechanical and magnetic properties of MRNCs and porous MRNCs will be the good candidate for miniature and flexible gripper’s jaws.
Keywords: Carbonyl Iron, MRNCs, Porosity, Silicone Rubber .