执行机构
水解
羧酸盐
离子
聚合物
材料科学
氧化物
磁性纳米粒子
自愈水凝胶
纳米技术
化学工程
磁铁
化学
纳米颗粒
高分子化学
有机化学
计算机科学
复合材料
人工智能
冶金
工程类
物理
量子力学
作者
T. J. Jiang,Yingying Zhang,Jinqiang Jiang,Zhong‐Wen Liu,Zhong‐Wen Liu,Guo Li
出处
期刊:Small
[Wiley]
日期:2024-03-03
被引量:1
标识
DOI:10.1002/smll.202308352
摘要
Magnetic hydrogel actuators are developed by incorporating magnetic fillers into the hydrogel matrix. Regulating the distribution of these fillers is key to the exhibited functionalities but is still challenging. Here a facile way to spatially synthesize ferrosoferric oxide (Fe3 O4 ) microparticles in situ in a thermal-responsive hydrogel is reported. This method involves the photo-reduction of Fe3+ ions coordinated with carboxylate groups in polymer chains, and the hydrolytic reaction of the reduced Fe2+ ions with residual Fe3+ ions. By controlling the irradiation time and position, the concentration of Fe3 O4 microparticles can be spatially controlled, and the resulting Fe3 O4 pattern enables the hydrogel to exhibit complex locomotion driven by magnet, temperature, and NIR light. This method is convenient and extendable to other hydrogel systems to realize more complicated magneto-responsive functionalities.
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