执行机构
纳米复合材料
磁铁矿
悬臂梁
材料科学
胶粘剂
形状记忆合金
极限抗拉强度
自愈水凝胶
纳米颗粒
形状记忆聚合物
导电体
磁铁
纳米技术
复合材料
高分子化学
工程类
计算机科学
机械工程
冶金
图层(电子)
人工智能
作者
Sakineh Alipour,Ali Pourjavadi,Seyed Hasan Hosseini
标识
DOI:10.1016/j.carbpol.2023.120610
摘要
Shape memory hydrogels attract increasing attention as flexible strain sensors due to their shape recovery property that can improve the lifetime of the sensor. Herein, we have designed a magnetic shape memory hydrogel based on Fe3O4 nanoparticles, carrageenan, and poly (acrylamide-co-acrylic acid) with self-adhesive and conductive properties. The resulting double network hydrogel showed promising actuator and strain sensor applications. Electrical conductivity was observed in this hydrogel without using additional ions. The presence of magnetite nanoparticles increased the tensile strength and temporary shape fixity ratio to around 6.5 MPa and 94.3 %, respectively. The excellent cantilever and catheter-like behavior of the hydrogels were illustrated through magnetic routing by an external magnet. Also, these hydrogels demonstrated suitable performance in the 500 cycles strain sensing tests before and after their initial shape recovery.
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