AbstractAn alternating magnetic field (AMF)‐induced electrospun fibrous composite actuator with functions of directionally fast actuation, non‐contact operation, and obstacle‐penetrating triggering is demonstrated in this paper for the first time. The porous structure of the electrospun fibrous mat and the built‐in heat source of Fe3O4 particles enable the actuator to have a curvature exceeding 0.4 mm−1 in only 6 s, and similar motions can be triggered even when the composite actuator is covered by a piece of polytetrafluoroethylene (PTFE) mat. By changing the angle between the fiber orientation and long axis of the poly(N‐isopropylacrylamide‐co‐4‐acryloyloxybenzophenone) P(NIPAM‐ABP) fibrous mat, the direction of the actuator movement can be precisely controlled. With either a low loading amount of 5 wt% Fe3O4 particles in TPU or a low AFM of 0.5 kA m−1, it is difficult to initiate actuation, but an actuator with 10 or 15 wt% Fe3O4 particles in thermoplastic polyurethane (TPU) in a 2.0 or 3.8 kA m−1 AFM can trigger the actuation effectively.
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