A Smart Polymer Composite Based on a NiTi Ribbon and a Magnetic Hybrid Material for Actuators with Multiphysic Transduction

Abstract

A smart composite material constituted of a magnetic hybrid film and a NiTi shape memory alloy (SMA) ribbon was obtained and characterized. The magnetic hybrid film was joined to the NiTi ribbon in order to combine the properties of both materials. This new composite material combines magnetic properties of the hybrid film, (Fe2O3-CMC)/(polyvinyl butyral), and the shape memory properties of the NiTi ribbon, which has a chemical composition of Ti-50.13 at. % Ni. This smart composite material has a mass of 18.3% NiTi ribbon and 81.7% magnetic hybrid film. Results obtained by DSC show that the smart composite material presents a small delay of transformation during warming and cooling because the magnetic hybrid film acts like a thermal insulator. Thermomechanical results indicate that the hybrid material also acts as a mechanical reinforcement, since it is observed that the Stress-Assisted Two-Way Memory Effect (SATWME) of the smart composite is lower than the SATWME of the SMA ribbon. The density current values of phase transformations were clearly identified with a thermomechanical apparatus developed in our laboratory. Finally, displacements of the smart composite material in cantilever configuration are obtained by applying an external magnetic field. All these results demonstrate that the smart composite material can be

The effect of iron oxide nanoparticles on the mechanical relaxation of magnetic polymer hybrid films composed of a polystyrene matrix, a fractional calculus approach

“…Magnetic polymer hybrid films (MPHFs), composed of iron oxide nanoparticles (IONPs) and polymer matrices, are of great interest to carry out functions as actuators or sensors in electronic or mechatronic devices . However, structural relaxations of the polymeric matrix must be studied to optimize the potential applications of these MPHFs.…”

“…Magnetic polymer hybrid films (MPHFs), composed of iron oxide nanoparticles (IONPs) and polymer matrices, are of great interest to carry out functions as actuators or sensors in electronic or mechatronic devices. [1][2][3][4][5][6][7] However, structural relaxations of the polymeric matrix must be studied to optimize the potential applications of these MPHFs. Several thermoplastic polymers can be used as the matrix, and polystyrene (PS) is one of the most important thermoplastic polymers in several areas of industry.…”

“…The addition of IONPs into a PS matrix produces a synergy among them, such that the obtained MPHF responds to an external magnetic field with fast reaction and contactless control. 1,2,7 Additional applications could also be obtained for MPHFs considering that the magnetic properties of IONPs are very important due to their potential integration into a broad range of technological applications, extending from magnetic fluids, 12,13 catalysis, 14 ultrahigh-density magnetic storage media, 15 biotechnology and biomedicine, 13 and magnetic resonance imaging. 16 IONPs could have a single magnetic domain structure, consisting of spins groups all pointing in the same direction and acting cooperatively.…”

Study of Interfacial Adhesion between Nickel-Titanium Shape Memory Alloy and a Polymer Matrix by Laser Surface Pattern

“…Hybrid composites, consisting of binary or more elemental systems involving polymer and Ni-Ti, have been developed in the last 5 years [4]. Some researchers have studied polymer composite actuators with SMA alloys and taking the advantages of the glass transition temperature of the polymer and the phase transition temperature of Ni-Ti alloys [5]. The effect of temperature on the phase transition in the hybrid composite opens up wide potential in shape setting behavior [6][7][8][9] in the field of actuators and in the mechanical response of the composite.…”

High Resolution Actuators

“…The next article, referenced in [11], presents the synthesis and the characterization of a smart composite material made up of a magnetic hybrid film and a NiTi shape memory alloy (SMA) ribbon. A particularity of this hybrid smart material is that it can be activated by temperature, electrical current, stress, and/or magnetic field, offering good expectations for actuating applications with multiphysic transduction.…”