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Mussel-Inspired Adhesive and Carbon Fiber Conductive Hydrogel for Flexible Sensors
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2023-07-05 , DOI: 10.1021/acsapm.3c00983
Yuchan Huang 1 , Tang Zhu 1 , Zijuan Zhu 1 , Huixin Yuan 1 , Liru Tan 1 , Pingping Yao 1 , Yongna Qiao 1 , Caizhen Zhu 1 , Jian Xu 1
Affiliation  

Conductive hydrogels, which are considered to be a promising material for human motion detection sensors, often display low flexibility, limited elongation, and non-adhesive properties. Herein, a multifunctional hydrogel with self-adhesive, highly stretchable, and conductive properties was developed by introducing polydopamine (DA) and carbon fiber (CF) into polyacrylamide (PAAm) hydrogel. The DA was polymerized with oxygen to form polydopamine (PDA), and the PDA-CF-PAAm hydrogel was hybrid-crosslinked with covalent bonds and recoverable non-covalent bonds including hydrogen bonds and π-π stacking. Therefore, the prepared PDA-CF-PAAm hydrogel exhibits high and reversible stretchability. Additionally, the hydrogel demonstrates high adhesiveness on various substrate surfaces, such as paper, glass, rubber, and biological tissue surfaces due to the catechol groups of PDA. Furthermore, the obtained PDA-CF-PAAm hydrogel is conductive because of the addition of CF. As a result, the self-adhesive, highly stretchable, and conductive PDA-CF-PAAm hydrogel can be directly adhered to the skin as a strain sensor to monitor human body motion. This work may expand the scope of multifunctional hydrogel preparation for flexible wearable devices.

中文翻译:

用于柔性传感器的受贻贝启发的粘合剂和碳纤维导电水凝胶

导电水凝胶被认为是用于人体运动检测传感器的有前途的材料,但通常表现出低柔韧性、有限的伸长率和非粘合特性。在此,通过将聚多巴胺(DA)和碳纤维(CF)引入聚丙烯酰胺(PAAm)水凝胶中,开发了一种具有自粘性、高拉伸性和导电性的多功能水凝胶。DA与氧聚合形成聚多巴胺(PDA),PDA-CF-PAAm水凝胶通过共价键和可恢复的非共价键(包括氢键和π-π堆积)进行杂化交联。因此,所制备的PDA-CF-PAAm水凝胶表现出高且可逆的拉伸性。此外,水凝胶在各种基材表面(例如纸张、玻璃、橡胶、和生物组织表面由于 PDA 的儿茶酚基团。此外,由于添加了CF,所得PDA-CF-PAAm水凝胶具有导电性。因此,自粘性、高拉伸性、导电性的PDA-CF-PAAm水凝胶可以直接粘附在皮肤上作为应变传感器来监测人体运动。这项工作可能会扩大柔性可穿戴设备多功能水凝胶制备的范围。
更新日期:2023-07-05
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