Experimental Investigation of the Magnetorheological Behavior of PDMS Elastomer Reinforced with Iron Micro/Nanoparticles

Abstract

Abstract:The aim of this article focuses on identifying how the addition of iron micro-and nanoparticles influences the physical properties of magnetorheological composite materials developed with a polydimethylsiloxane (PDMS) matrix with different contents of silicone oil used as additive. A number of characterization techniques have been performed in order to fully characterize the samples, such as cyclic and uniaxial extension, rheology, swelling, Vibrating sample magnetometer (VSM), X-ray Diffraction (XRD), Scanning electron microscopy (SEM), Fourier-Transform Infrared (FTIR), X-ray photoelectronic spectroscopy (XPS) and Thermogravimetric analysis (TGA). The comparison between two matrices with different shore hardnesses and their mechanical and chemical properties are elucidated by swelling and tensile tests. In fact, swelling tests showed that higher crosslink density leads to increasing elongation at break and tensile strength values for the composite materials. The best mechanical performance in the magnetorheological material was observed for those samples manufactured using a higher silicone oil content in a hard polymeric matrix. Furthermore, it has been found that the magnetic properties are enhanced when nanoparticles are used as fillers instead of microparticles.

Magneto‐piezoresistive characteristics of graphene/room temperature vulcanized silicon rubber‐silicon rubber magnetorheological elastomer

“…It can be seen from Equation (11) and (22) that the resistance of GR/RTV-MRE under external pressure and magnetic field is related to the normal bulk resistance R 0 . According to the basic equation of material resistance, it can be obtained as follows:…”

“…The results showed that the presence of graphite fractions arrangement contributes to the conductivity of MRE. Luis et al 22 surveyed the effects of iron particles and nanoparticles on the magnetorheological behavior of polydimethylsiloxane elastomer by experimental investigation. Aziz et al 23,24 studied the effect of different types of multiwall carbon nanotubes on the morphological, magnetic and viscoelastic properties of MREs.…”

Magnetic Particle Filled Elastomeric Hybrid Composites and Their Magnetorheological Response

“…In addition, they are composed of nano- or micron-sized hard magnetic particles dispersed in an elastomeric soft matrix. The magnetic particles used in MR elastomers are carbonyl iron, iron oxides and other soft-magnetic particles without magnetic hysteresis, and suitable elastomer matrix materials include natural rubber [ 28 , 29 ], silicone rubber [ 30 , 31 , 32 ], nitrile rubber [ 33 ], polybutadiene rubber [ 34 , 35 ] and polyurethane rubber [ 36 , 37 ]. Specifically, magnetically-controllable elastomer composites with magnetic particles promise to have more functions than conventional elastomers.…”

Visco-Hyperelastic Model with Damage for Simulating Cyclic Thermoplastic Elastomers Behavior Applied to an Industrial Component

“…The hyperelastic and viscoelastic behaviors are characteristic of elastomers [16,17,18,19,20,21,22,23,24,25,26,27,28]. Since the relationship between stress and strain is nonlinear and time-dependent, it is necessary to resort to constitutive models able to reproduce both phenomena.…”