Ultra elastic, stretchable, self-healing conductive hydrogels with tunable optical properties for highly sensitive soft electronic sensors,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ultra elastic, stretchable, self-healing conductive hydrogels with tunable optical properties for highly sensitive soft electronic sensors
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-11-09 , DOI: 10.1039/d0ta09735g
Meng Wu _{1,

2,

3,

4} , Jingsi Chen _{1,

2,

3,

4} , Yuhao Ma _{2,

3,

4,

5} , Bin Yan _{6,

7,

8,

9} , Mingfei Pan _{1,

2,

3,

4} , Qiongyao Peng _{1,

2,

3,

4} , Wenda Wang _{1,

2,

3,

4} , Linbo Han _{9,

10,

11,

12} , Jifang Liu _{9,

13,

14,

15} , Hongbo Zeng _{1,

2,

3,

4}

Affiliation

Conductive hydrogels are of great significance for soft electronic devices. However, the intrinsically weak nature, lack of fatigue resistance and self-healing capability, and the absence of stimuli-responsiveness of traditional conductive hydrogels hinder their application as durable, reliable and smart conductors to fulfill the increasing demands of modern electronics. Herein, we have developed a novel hydrogel ionic conductor by integrating nanofiller reinforcement with micelle cross-linking. The hydrogel was facilely prepared via one-pot polymerization of acrylamide and an amino-functionalized monomer in the presence of multiwall carbon nanotubes, aldehyde-modified F127 and LiCl. The dynamic chemical and physical interactions of the cross-linked network provide the hydrogel with a wide spectrum of properties, including excellent stretchability (1200%), skin-mimetic modulus, toughness, exceptional elasticity (recovery from 1000% strain), resistance to damage by sharp materials, self-healing properties (636% stretchability after self-healing) and high conductivity (3.96 S m⁻¹). Besides, the rational design of the hydrogel endows it with multiple sensory capabilities toward temperature, strain and pressure. The hydrogel demonstrated cooling-induced whitening optical behavior. When exploited as a strain and pressure sensor to monitor diverse human motions, the prepared hydrogel sensor showed excellent sensitivity and reliability even for the acquisition of detailed waveform changes of radial artery pulses before and after exercise, suggesting its superior sensitivity compared to previously reported hydrogel sensors. The hydrogel was further integrated with an eye mask to monitor human sleep and showed high reliability for the detection of rapid eye movement (REM) sleep. This work provides new insights into the fabrication of multifunctional, smart and conductive materials, showing great promise for a broad range of applications like wearable sensors, artificial skins, and soft robotics.

中文翻译：

超弹性，可拉伸，自修复的导电水凝胶，具有可调节的光学特性，适用于高度敏感的软电子传感器

导电水凝胶对软电子设备具有重要意义。然而，固有的弱本性，缺乏抗疲劳性和自我修复能力以及传统导电水凝胶缺乏刺激响应性，阻碍了它们作为满足现代电子产品日益增长的需求的耐用，可靠和智能导体的应用。本文中，我们通过将纳米填料增强与胶束交联相结合，开发了一种新型的水凝胶离子导体。水凝胶通过以下方法方便地制备在多壁碳纳米管，醛改性的F127和LiCl的存在下，丙烯酰胺和氨基官能化单体的一锅聚合。交联网络的动态化学和物理相互作用为水凝胶提供了广泛的特性，包括出色的可拉伸性（1200％），模拟皮肤的模量，韧性，出色的弹性（从1000％应变中恢复），抗破坏性通过锋利的材料，具有自修复性能（自修复后可拉伸636％）和高导电率（3.96 S m ^-1）。此外，水凝胶的合理设计赋予其对温度，应变和压力的多种感官能力。水凝胶显示出冷却引起的增白光学行为。当用作应变和压力传感器来监测人体的各种动作时，准备好的水凝胶传感器即使在运动前和运动后采集radial动脉脉搏的详细波形变化时，也具有出色的灵敏度和可靠性，这表明它比以前报道的水凝胶传感器具有更高的灵敏度。该水凝胶还与眼罩集成在一起以监测人类的睡眠，并显示出快速眼动（REM）睡眠检测的高度可靠性。这项工作为多功能，智能和导电材料的制造提供了新的见解，

更新日期：2020-11-17

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11