A Simple and Effective Physical Ball-Milling Strategy to Prepare Super-Tough and Stretchable PVA@MXene@PPy Hydrogel for Flexible Capacitive Electronics.
A Simple and Effective Physical Ball-Milling Strategy to Prepare Super-Tough and Stretchable PVA@MXene@PPy Hydrogel for Flexible Capacitive Electronics.
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DOI：
10.1002/smll.202303038
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发表时间：
2023-07
期刊：
影响因子：
13.3
通讯作者：
Zipeng Qin;Gang Zhao;Yaoyang Zhang;Zhiheng Gu;Yuhan Tang;J. T. Aladejana;Junna Ren;Yunhong Jiang;Zhanhu Guo;Xiangfang Peng;Xuehua Zhang;B. Xu;Tingjie Chen
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文献类型：
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作者：
Zipeng Qin;Gang Zhao;Yaoyang Zhang;Zhiheng Gu;Yuhan Tang;J. T. Aladejana;Junna Ren;Yunhong Jiang;Zhanhu Guo;Xiangfang Peng;Xuehua Zhang;B. Xu;Tingjie Chen
用于电子皮肤的仿生柔性电子器件由于其感知各种运动的能力而受到越来越多的关注。然而，智能仿皮肤材料的开发仍然是一个挑战。在这里，报道了一种简单有效的方法来制造由聚乙烯醇（PVA）、Ti3 C2 Tx MXene纳米片和聚吡咯（PPy）（PMP水凝胶）组成的超韧、可拉伸和自愈合的导电水凝胶。MXene纳米片和Fe3+作为多功能交联剂和有效的应力传递中心，促进PMP水凝胶具有相当高的导电性，超韧性和超高拉伸性（伸长率高达4300%）。由于动态硼酸酯键的存在，该水凝胶还表现出快速的自愈合和可重复的自粘附能力。由PMP水凝胶制成的柔性电容式应变传感器显示出相对宽的应变感测范围（高达400%），具有自修复功能。该传感器可以精确地监测各种人体生理信号，包括关节运动，面部表情和脉搏波。PMP水凝胶超级电容器的电容保持率高达92.83%，库仑效率高达100%。
Biomimetic flexible electronics for E-skin have received increasing attention, due to their ability to sense various movements. However, the development of smart skin-mimic material remains a challenge. Here, a simple and effective approach is reported to fabricate super-tough, stretchable, and self-healing conductive hydrogel consisting of polyvinyl alcohol (PVA), Ti3 C2 Tx MXene nanosheets, and polypyrrole (PPy) (PMP hydrogel). The MXene nanosheets and Fe3+ serve as multifunctional cross-linkers and effective stress transfer centers, to facilitate a considerable high conductivity, super toughness, and ultra-high stretchability (elongation up to 4300%) for the PMP hydrogel with. The hydrogels also exhibit rapid self-healing and repeatable self-adhesive capacity because of the presence of dynamic borate ester bond. The flexible capacitive strain sensor made by PMP hydrogel shows a relatively broad range of strain sensing (up to 400%), with a self-healing feature. The sensor can precisely monitor various human physiological signals, including joint movements, facial expressions, and pulse waves. The PMP hydrogel-based supercapacitor is demonstrated with a high capacitance retention of ≈92.83% and a coulombic efficiency of ≈100%.