Compressive properties of magnetorheological elastomer with different magnetic fields and types of filler

Abstract

Magnetorheological elastomer (MRE) specimens were prepared to find the optimum compressive characteristics using different types and amounts of iron powder. A magnetic field of up to 2 T was applied during vulcanization. Among the four types of iron powders, the specimen with round‐shaped carbonyl iron powder and small grain size shows higher magnetic effects than that with bigger and irregularly shaped electrolyte iron powder. However, the compressive modulus of the rubber with electrolyte iron powder is higher without magnetic treatment at a given amount. In general, the bigger and irregularly shaped iron particles tend to move slowly and produce nonuniform distribution when a magnetic field is applied. The experimental results show that the mechanical properties are better when applying a magnetic field of 1.5 T compared with 2.0 T during the specimen vulcanization. Applying a magnetic field of 300 mT during the compression test enhanced the compressive modulus by 12% to 15%. The rate of increase of the modulus decreased exponentially with prestrain.

Experimental Investigation on the Effect of Graphene Oxide Additive on the Steady-State and Dynamic Shear Properties of PDMS-Based Magnetorheological Elastomer

“…However, the produced MREs with soft matrices have low zero-field moduli, which is in most cases undesirable from a practical point of view [ 15 , 18 , 19 ]. The higher particle fraction can also lead to a larger increment in the compressive modulus [ 20 ], dynamic storage and loss moduli [ 21 ]. A high particle fraction in MREs causes a great increase of the viscosity of the pre-cured composite and particle aggregations, thus doing harm to the properties of MREs [ 2 , 22 ].…”

Anisotropic magnetorheological elastomers with carbonyl iron particles in natural rubber and acrylonitrile butadiene rubber: A comparative study

“…The microstructure plays an important character in determining the mechanical properties of the rubber composites (Boczkowska et al, 2007;Chen et al, 2007b). The microstructure depends on the type of iron particles, rubber matrix, polymer-filler interface, polymer-filler interactions, and the time and magnitude of the magnetic field used during curing (Lee et al, 2019).…”

“…Various types of iron particles such as carbonyl were studied in a polyurethane matrix, and their effects on the orientation and mechanical properties under a magnetic field were demonstrated (Boczkowska et al, 2012). Different types of iron particles are used either alone or in a hybrid form (Farshad et al, 2004;Lee et al, 2019). Various types of polymer matrix are also used in MREs, such as silicone rubber (Farshad et al, 2004), other thermoplastics (Zajac et al, 2010), and polyurethane/silicone rubber hybrids (Hu et al, 2005).…”

Mechanical and magnetic response of magneto‐rheological elastomers with different types of fillers and their hybrids

“…Kumar et al showed that depending on the applied magnetic field, MREs can be isotropic (absence of magnetic field) or anisotropic (presence of magnetic field) (Figure 1). 2,3 Lee et al showed that the mechanical properties of MREs depend upon the type of iron particle, type of polymer matrix, and magnitude of the applied magnetic field 4–6 …”