Controlling magnetic properties of 3D-printed magnetic elastomer structures via fused deposition modeling

Several methods have been used to optimize performance of magnetic elastomers by controlling the microstructure, such as annealing. Another way introduce anisotropy is Fused Deposition Modeling (FDM), which has shown manipulate rigid printed parts. However, use flexible composite materials not yet explored due additional processing challenges. The primary goal this study demonstrate tunable these via 3D structures without post-processing a viable means tune elastomer materials. Here, FDM were with thermoplastic polyurethane (TPU) polymer and either iron, carbonyl or magnetite particulate. In order determine relative effect different parameters on properties, series samples combining each material type aspect ratios, infill percentages, orientations. A Vibrating Sample Magnetometer (VSM) was obtain hysteresis loops in compare susceptibility between samples. Results demonstrated that provides method achieving directional signature annealing requiring any post-processing; instead, manifests through part’s internal structure. As such, concept referred (IMA). These variables found form continuum responses. Additionally, chosen particulate transfers its material. Overall, highly customizable nuanced characteristics 3D-printed will allow for application broad range emerging magneto-mechanical applications actuation soft robotics.