A bionic tactile plastic hydrogel-based electronic skin constructed by a nerve-like nanonetwork combining stretchable, compliant, and self-healing properties
A bionic tactile plastic hydrogel-based electronic skin constructed by a nerve-like nanonetwork combining stretchable, compliant, and self-healing properties
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DOI：
10.1016/j.cej.2019.122271
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发表时间：
2020-01-01
影响因子：
15.1
通讯作者：
Xu, Siying
中科院分区：
文献类型：
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作者：
Pan, Xiaofeng;Wang, Qinhua;Xu, Siying
为了完全模仿自然皮肤的触觉传感，柔性导电水凝胶（CH）已组装成仿生皮肤。然而，由于其高度线性的结构，大多数CH不能完美地重建人体皮肤的感觉。此外，CH很难同时满足超级可拉伸、快速自愈的特性。在这里，我们创新性地将原花青素/还原氧化石墨烯（PC/rGO）复合物与神经样纳米网络结合到甘油增塑的聚乙烯醇-聚氧乙烯共聚物中。（PVA-rGO）水凝胶系统，以获得仿生触觉PC/rGO/PVA水凝胶基电子皮肤，该皮肤完美模拟人体皮肤的触觉，并集成了出色的拉伸性（> 5000%）、顺应性（1 mm）、自愈合能力（3s，95.73%）。由于其独特的结构和机械性能，这种电子皮肤具有显著的可穿戴和应变敏感（GF = 14.14）特性，可以模仿和检测手指弯曲、面部表情变化、喉咙发声等一些真实的皮肤表皮运动。有趣的是，水凝胶也可以用作粘附电极，用于准确检测心电图（ECG）和肌电图（EMG）信号。更重要的是，这项工作提供了一种新的途径，通过水凝胶网络的分层设计来模仿自然皮肤的触觉能力。
To completely mimic the tactile sensing of natural skin, flexible conducive hydrogels (CHs) have been assembled into bionic skin. However, most CHs cannot perfectly rebuild the feeling of human skin due to their highly linear structure. In addition, CHs are difficult to meet the super-stretchable, rapid self-healing properties at the same time. Here, we innovatively incorporated a proanthocyanins/reduced graphene oxide (PC/rGO) composite with a nerve-like nanonetwork into a glycerol-plasticized polyvinyl alcohol-borax (PVA-borax) hydrogel system to obtain a bionic tactile PC/rGO/PVA hydrogel-based electronic skin, which perfectly simulates the tactual sensation of human skin and integrates excellent stretchability ( > 5000%), compliance (1 mm), self-healing (3 s, 95.73%) ability for the first time. Due to its unique structure and mechanical properties, this electronic skin has remarkable wearable and strain-sensitive (GF = 14.14) properties, which can mimic and detect some real skin epidermis movements such as finger bending, facial expression changes, and throat vocalization. Interestingly, the hydrogel can also be used as an adhesive electrode for the accurate detection of electrocardiograph (ECG) and electromyography (EMG) signals. More importantly, this work provides a new route in mimicking the natural skin's tactile ability through a hierarchical design of hydrogel networks.