Metallo-hydrogel with Tunable Fluorescence, High Stretchability, Shape-memory and Self-healing Properties
Metallo-hydrogel with Tunable Fluorescence, High Stretchability, Shape-memory and Self-healing Properties
复制标题
具有可调荧光、高拉伸性、形状记忆和自修复特性的金属水凝胶
DOI：
10.1021/acsami.9b06177
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发表时间：
2019
影响因子：
9.5
通讯作者：
Jinqing Qu
中科院分区：
文献类型：
--
作者：
Liuyan Tang;Shanshan Liao;Jinqing Qu
针对已有的智能光学金属水凝胶存在力学性能差的问题，本文报道了一种新型的具有良好延伸性、形状记忆能力、自修复能力和荧光强度可控性的智能光学金属水凝胶（Al-hydrogel）。以丙烯酸（AAc）、丙烯酰胺（AAm）和疏水性芳腙类配体（HHPMA）为单体，通过一锅法胶束共聚，使HHPMA与Al 3+和羧酸根与Al 3+配位，得到Al水凝胶。该水凝胶能够延伸至其原始长度的5000%而不断裂。其发射强度可通过OH-/H+或Zn ~（2+）/AAc调节，并且在0.1M OH-或Zn ~（2+）的存在下可增加500%。利用Fe ~（3+）/H ~+组成的可逆体系控制铝水凝胶的形状，赋予铝水凝胶形状记忆能力。这种高度可拉伸和多功能的铝水凝胶在信息传输、可穿戴设备和柔性传感器方面具有潜在的应用。
Aiming at the problem that the reported smart optical metallohydrogels were limited with poor mechanical properties, we reported here a novel smart optical metallohydrogel (Al-hydrogel) with excellent elongation, shape-memory ability, self-healing property, and controllable fluorescence intensity. The Al-hydrogel was obtained by the HHPMA–Al3+and carboxylate–Al3+coordination after one-pot micellar copolymerization of acrylic acid (AAc), acrylamide (AAm), and hydrophobic arylhydrazone-based ligand (HHPMA). This hydrogel was able to extend up to 5000% of its original length without fracture. Its emission intensity was tunable by OH–/H+or Zn2+/AAc and increased by 500% with 0.1 M OH–or Zn2+. Its tunable fluorescence enabled us to repeatedly pattern it. A reversible system consisting of Fe3+/H+, was implemented to control the shape of the Al-hydrogel, endowing the Al-hydrogel with shape-memory ability. This highly stretchable and multifunctional Al-hydrogel has potential applications in information transmission, wearable devices, and flexible sensors.