Abstract
Micron sized magnetic particles(Fe3O4) were dispersed in a polyvinyl alcohol (PVA) hydrogel. This multiferroic ferrogelcombines the elastic properties of PVA gel and the magnetic properties ofFe3O4 particles. The responseof the ferrogel (with Fe3O4 concentration in the range of 1–10 wt%) to the application of a staticmagnetic field (up to a maximum of 40 mT) was investigated. Theresults showed that the extent of deflection depended strongly on theFe3O4 content and the magnetic field strength. For eachFe3O4 concentration there existed a threshold value of magnetic field strength beforelarge deflection occurred. This implied that the ferrogel system can be used asan ‘on–off’ type transducer. The threshold value decreases with an increase inFe3O4 content. Finally, two approaches were used to evaluate this ferrogel system for artificialmuscle or soft actuator applications.
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