Flexible conductive hydrogels (FCHs) have attracted widespread interest as versatile monoliths that can be intricately integrated with various ingredients boasting multiple functionalities. The chemicophysical properties of FCHs cover a wide range, which significantly vary in their building blocks. However, achieving both favorable mechanical strength and high conductivity simultaneously through a facile approach remains a challenge. Herein, polyvinyl alcohol, dialdehyde cellulose nanofibrils, silver nanoparticles, borax, and tannic acid are readily “one-pot” incorporated into FCHs with great tensile stress (499 kPa), tensile strain (4591 %), and compressive stress (269 kPa) due to abundant hydrogen bonding, dynamic borate-diol bonding, and intermolecular acetalization. They also exhibit desired self-healing, generalized-adhesive, and antibacterial performances. Taking advantage of these, FCHs are further employed to support an epidermal sensor, on which remarkable strain sensitivity (gauge factor = 8.22), high-pressure sensitivity (≥ 0.258 kPa), and fast response (≤ 190 ms) are recorded. Its highly adaptive mechano-electric transformability and functions can be well maintained in serving as an array unit and touch screen pen. The results well addressed in this work are anticipated to pave the universal way of engineering FCHs.

中文翻译：

---

适用于多种传感应用的三交联、自修复聚乙烯醇/纳米纤维素水凝胶

柔性导电水凝胶（FCH）作为一种多功能整体材料引起了广泛的兴趣，它可以与具有多种功能的各种成分错综复杂地结合在一起。 FCH 的化学物理性质涵盖范围很广，其组成部分差异很大。然而，通过简单的方法同时实现良好的机械强度和高电导率仍然是一个挑战。在此，聚乙烯醇、二醛纤维素纳米纤丝、银纳米颗粒、硼砂和单宁酸很容易“一锅”掺入具有巨大拉伸应力（499 kPa）、拉伸应变（4591％）和压缩应力（269 kPa）的FCH中由于丰富的氢键、动态硼酸酯-二醇键和分子间缩醛化。它们还表现出所需的自修复、通用粘合和抗菌性能。利用这些优势，FCH 进一步用于支持表皮传感器，在该传感器上记录了显着的应变灵敏度（应变系数 = 8.22）、高压灵敏度（≥ 0.258 kPa）和快速响应（≤ 190 ms）。其高度自适应的机电变换能力和功能在用作阵列单元和触摸屏笔时可以得到很好的保持。这项工作中得到的很好的结果预计将为 FCH 工程铺平通用的道路。