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A Conductive Self‐Healing Double Network Hydrogel with Toughness and Force Sensitivity
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-04-17 , DOI: 10.1002/chem.201800259 Shunli Liu 1 , Kewen Li 1 , Imtiaz Hussain 1 , Olayinka Oderinde 1 , Fang Yao 1 , Jiuyang Zhang 1 , Guodong Fu 1
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-04-17 , DOI: 10.1002/chem.201800259 Shunli Liu 1 , Kewen Li 1 , Imtiaz Hussain 1 , Olayinka Oderinde 1 , Fang Yao 1 , Jiuyang Zhang 1 , Guodong Fu 1
Affiliation
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Mechanically tough and electrically conductive self‐healing hydrogels may have broad applications in wearable electronics, health‐monitoring systems, and smart robotics in the following years. Herein, a new design strategy is proposed to synthesize a dual physical cross‐linked polyethylene glycol/poly(acrylic acid) (PEG/PAA) double network hydrogel, consisting of ferric ion cross‐linked linear chain extensions of PEG (2,6‐pyridinedicarbonyl moieties incorporated into the PEG backbone, PEG‐H2pdca) as the first physical network and a PAA‐Fe3+ gel as the second physical network. Metal‐ion coordination and the double network structure enable the double network hydrogel to withstand up to 0.4 MPa tensile stress and 1560 % elongation at breakage; the healing efficiency reaches 96.8 % in 12 h. In addition, due to dynamic ion transfer in the network, the resulting hydrogels exhibit controllable conductivity (0.0026–0.0061 S cm−1) and stretching sensitivity. These functional self‐healing hydrogels have potential applications in electronic skin. It is envisioned that this strategy can also be employed to prepare other high‐performance, multifunctional polymers.
中文翻译：
具有韧性和力敏性的导电自修复双网络水凝胶
在接下来的几年中，具有机械韧性和导电性的自修复水凝胶可能会在可穿戴电子设备，健康监测系统和智能机器人中得到广泛应用。本文提出了一种新的设计策略，以合成由PEG（2,6-吡啶二羰基部分并入PEG主链，PEG-H 2 pdca）作为第一个物理网络和PAA-Fe 3+凝胶作为第二个物理网络。金属离子配位和双网状结构使双网水凝胶可承受0.4 MPa的拉应力和1560％的断裂伸长率；12 h内治愈率达到96.8％。另外，由于网络中动态的离子转移，所得水凝胶显示出可控制的电导率（0.0026–0.0061 S cm -1）和拉伸敏感性。这些功能性自修复水凝胶在电子皮肤中具有潜在的应用。可以预见，该策略也可用于制备其他高性能，多功能聚合物。
更新日期：2018-04-17
中文翻译：
具有韧性和力敏性的导电自修复双网络水凝胶
在接下来的几年中，具有机械韧性和导电性的自修复水凝胶可能会在可穿戴电子设备，健康监测系统和智能机器人中得到广泛应用。本文提出了一种新的设计策略，以合成由PEG（2,6-吡啶二羰基部分并入PEG主链，PEG-H 2 pdca）作为第一个物理网络和PAA-Fe 3+凝胶作为第二个物理网络。金属离子配位和双网状结构使双网水凝胶可承受0.4 MPa的拉应力和1560％的断裂伸长率；12 h内治愈率达到96.8％。另外，由于网络中动态的离子转移，所得水凝胶显示出可控制的电导率（0.0026–0.0061 S cm -1）和拉伸敏感性。这些功能性自修复水凝胶在电子皮肤中具有潜在的应用。可以预见，该策略也可用于制备其他高性能，多功能聚合物。
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