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A tough hydrogel with fast self-healing and adhesive performance for wearable sensors
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 4.9 ) Pub Date : 2021-10-24 , DOI: 10.1016/j.colsurfa.2021.127793
Chunyin Lu 1 , Jianhui Qiu 1 , Wei Zhao 1 , Eiichi Sakai 1 , Guohong Zhang 1
Affiliation  

The purpose of this work is to address the two existing challenges. One is to achieve the balance of mechanical properties, adhesion, and self-healing ability in hydrogel used in wearable devices. The other is to use mature products as raw materials and simplify the preparation process of adhesive hydrogels, so as to make it possible for large-scale industrial production. A novel PAA/Fe/PVP hydrogel has been prepared by a simple one-step radical polymerization to meet the above requirements. As the main component of adhesives in daily life, PVP is used to improve the adhesion of the hydrogel. The adhesion as high as 64kPa is achieved in the hydrogel. The adhesion can also withstand multiple uses due to the good mechanical properties of the hydrogel. Furthermore, the hydrogel displays outstanding self-healing ability in terms of both mechanical properties and conductivity. Because of the good mechanical properties, robust adhesion and rapid self-healing ability, the hydrogel-based sensors have demonstrated stability, accuracy and reliability in real-time monitoring of subtle facial micro-expressions and large human activities. In addition, the method uses mature products as raw materials, and the preparation process is simple, so it has the potential for large-area and low-cost production.



中文翻译:

用于可穿戴传感器的具有快速自愈和粘合性能的坚韧水凝胶

这项工作的目的是解决现有的两个挑战。一是在可穿戴设备中使用的水凝胶中实现机械性能、附着力和自愈能力的平衡。二是以成熟的产品为原料,简化胶粘剂水凝胶的制备工艺,使大规模工业化生产成为可能。为了满足上述要求,通过简单的一步自由基聚合制备了一种新型 PAA/Fe/PVP 水凝胶。PVP作为日常生活中粘合剂的主要成分,用于提高水凝胶的附着力。在水凝胶中实现了高达 64kPa 的粘附力。由于水凝胶的良好机械性能,粘附力还可以承受多次使用。此外,水凝胶在机械性能和导电性方面都表现出出色的自愈能力。由于良好的机械性能、强大的粘附力和快速的自愈能力,基于水凝胶的传感器在实时监测微妙的面部微表情和大型人类活动方面表现出稳定性、准确性和可靠性。此外,该方法以成熟产品为原料,制备工艺简单,具有大面积低成本生产的潜力。

更新日期:2021-10-25
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