An autonomously healable, highly stretchable and cyclically compressible, wearable hydrogel as a multimodal sensor,Polymer Chemistry

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An autonomously healable, highly stretchable and cyclically compressible, wearable hydrogel as a multimodal sensor
Polymer Chemistry ( IF 4.1 ) Pub Date : 2019/12/24 , DOI: 10.1039/c9py01737b
Jianfei Tie _{1,

2,

3,

4,

5} , Liduo Rong _{1,

2,

3,

4,

5} , Hongchen Liu _{6,

7,

8,

9} , Bijia Wang _{1,

2,

3,

4,

5} , Zhiping Mao _{1,

2,

3,

4,

5} , Linping Zhang _{1,

2,

3,

4,

5} , Yi Zhong _{1,

2,

3,

4,

5} , Xueling Feng _{1,

2,

3,

4,

5} , Xiaofeng Sui _{1,

2,

3,

4,

5} , Hong Xu _{1,

2,

3,

4,

5}

Affiliation

Stretchable, self-healable, conductive hydrogels have received increasing attention due to their broad range of applications, such as wearable devices and ionic skin. However, severe challenges remain in integrating fatigue resistance, favorable self-healing, and stretchable and compressible efficiency into a hydrogel. Herein, a highly stretchable, compressible, self-healable somatosensory platform was fabricated by blending Fe³⁺ ions with polyvinyl alcohol acetoacetate (PVAA)/polyacrylamide (PAM) hydrogel to form a double network hydrogel, which combined chemical coordination and physical crosslinking in one system. In this system, the PAM network offered high stretchability and compressibility to the hydrogel. Meanwhile, the coordination of the Fe³⁺/PVAA network provided ionic conductivity and self-healing ability. The resulting hydrogel exhibits prominent stretchability (>700%), high sensitivity, high healing efficiency (80% within 24 h) and excellent fatigue resistance. Therefore, the hydrogel could be used as a potential artificial ionic skin including strain and pressure sensors to directly monitor human motion.

中文翻译：

可自主修复，高度可拉伸，可循环压缩，可穿戴的水凝胶作为多峰传感器

可拉伸，可自愈的导电水凝胶由于其广泛的应用而受到越来越多的关注，例如可穿戴设备和离子皮肤。然而，将耐疲劳性，良好的自我修复以及可拉伸和可压缩的效率整合到水凝胶中仍然是严峻的挑战。在此，通过将Fe ³⁺离子与聚乙烯醇乙酰乙酸酯（PVAA）/聚丙烯酰胺（PAM）水凝胶共混以形成双网络水凝胶，将化学配位和物理交联结合在一起，制得了一种高度可拉伸，可压缩，可自愈的体感平台。系统。在该系统中，PAM网络为水凝胶提供了高拉伸性和可压缩性。同时，Fe ³⁺的配位/ PVAA网络提供了离子电导率和自我修复能力。所得水凝胶显示出显着的可拉伸性（> 700％），高灵敏度，高愈合效率（24小时内80％）和出色的抗疲劳性。因此，水凝胶可用作潜在的人造离子皮肤，包括应变和压力传感器以直接监测人体运动。

更新日期：2020-02-19

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