材料科学
执行机构
热塑性聚氨酯
复合数
复合材料
静电纺丝
磁场
聚合物
弹性体
电气工程
物理
量子力学
工程类
作者
Dongyan Shao,Wenjing Song,Xiaohong Qin,Rongwu Wang,Li Liu
标识
DOI:10.1002/mame.202200219
摘要
An 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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