Abstract

Ferromagnetic fillers were incorporated within polydimethylsiloxane (PDMS) at concentrations of 0.1 wt% and 1 wt%. Deformation was detected via magnetic field response during compression tests. Testing of five of the six ferromagnetic fillers in PDMS revealed that 1 wt% was the minimum filler concentration required to detect compression via the magnetic field response. Settling of neodymium particles was evident; thus, Stokes’ Law was used to investigate setting velocity of the particles. Overall, ferromagnetic fillers in PDMS cylinders provided a quantitative sensor of force and material displacement suggesting utility as sensors embedded in larger soft material constructs.

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