It is the era of technological progress, contributing to the booming development in personalized smart wearable devices. As a representative of smart devices, flexible sensor devices are popular in many fields including electronic skin, tissue engineering, and soft robotics. Among them, hydrogel with high water-containing and stable structures is one of the most promising candidates for flexible sensor devices, attracting the attention of researchers. However, the topics of environmental protection and energy conservation are also currently unavoidable, so friendly materials and preparation strategies for the hydrogel are required for relieving the pressure on energy and the environment. In this work, the collagen-based multi-functional conductive hydrogel (PBTC) based on natural biomass materials, eco-friendly polyvinyl alcohol (PVA), and “one pot” strategy had been prepared rationally for balancing the issues in the environment, energy, and multi-functional sensing hydrogel. The mechanical property, adhesive property, self-healing property, conductive property, degradability, and cytocompatibility of PBTC were tested in detail and confirmed. In particular, the excellent extensibility (strain over 1500 %), rapid self-healing efficiency (over 90 % within 90 s), stable and repeatable conductivity (fatigue testing for 1000 s and GF (gauge factor) of 2.66), and high cell viability (over 95 %) of PBTC are further proved, which is favorable for its applications of human motion monitoring. Overall, this work provides further inspiration and understanding of the natural biomass materials for applications, as well as new ideas and methods for developing more efficient, reliable, multi-functional, and sustainable flexible sensing devices.

中文翻译：

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用于运动监测的高度坚固、自粘、自愈、pH 响应、细胞相容性和可降解的基于胶原蛋白/PVA/单宁的导电水凝胶传感器


这是技术进步的时代，个性化智能可穿戴设备蓬勃发展。作为智能设备的代表，柔性传感器设备在电子皮肤、组织工程、软机器人等多个领域受到广泛欢迎。其中，具有高含水量和稳定结构的水凝胶是柔性传感器器件最有前途的候选者之一，引起了研究人员的关注。然而，环保和节能的话题目前也是不可避免的，因此需要友好的材料和水凝胶的制备策略来缓解能源和环境的压力。本工作合理制备了基于天然生物质材料、环保聚乙烯醇（PVA）和“一锅”策略的胶原基多功能导电水凝胶（PBTC），以平衡环境、能源问题、多功能传感水凝胶。对PBTC的机械性能、粘合性能、自修复性能、导电性能、可降解性、细胞相容性等进行了详细测试并确认。尤其是优异的延伸性（应变超过1500%）、快速自愈效率（90秒内超过90%）、稳定且可重复的导电性（疲劳测试1000秒，GF（应变系数）为2.66）以及高电池PBTC的可行性（超过95％）得到进一步证明，这有利于其在人体运动监测中的应用。总的来说，这项工作为天然生物质材料的应用提供了进一步的启发和理解，也为开发更高效、可靠、多功能和可持续的柔性传感设备提供了新的思路和方法。