Biodegradable Humidity Actuators for Sustainable Soft Robotics using Deliquescent Hydrogels

A. Keller, Qiukai Qi, Yogeenth Kumaresan, A. Conn, J. Rossiter
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Abstract

Intelligent materials offer new avenues when designing sustainable robotics as they allow for the creation of dynamic constructs which react autonomously to changes in the environment, such as humidity. Here we present a novel humidity actuator which exploits the unique property of deliquescent salts to allow for the spontaneous rehydration of hydrogels in ambient environments. By soaking a 2% w/v alginate, 3% w/v Agar composite in 1M calcium chloride, an intelligent humidity-driven actuator was developed. The hydrogel was able to gain 73.8±7.1% of its weight from a dehydrated state in just 6 hours through water absorption from ambient air. Using this novel formulation, linear and bilayer bending actuators were constructed. In addition to this, a biodegradable deliquescence-actuated artificial flower was demonstrated, highlighting this material's potential to act as an intelligent humidity actuator for the construction of environmentally-reactive biomimetic sustainable robotics.
使用潮解水凝胶的可持续软机器人的可生物降解湿度驱动器
智能材料为设计可持续机器人提供了新的途径,因为它们允许创建动态结构,这些结构可以自主地对环境变化做出反应,例如湿度。在这里,我们提出了一种新的湿度致动器,它利用潮解盐的独特性质,允许水凝胶在环境中自发再水化。将2% w/v海藻酸盐、3% w/v琼脂复合材料浸泡在1M氯化钙中,研制了一种智能湿度驱动致动器。通过从周围空气中吸收水分,水凝胶能够在短短6小时内从脱水状态中增加73.8±7.1%的重量。利用该新公式,构造了线性和双层弯曲致动器。除此之外,还展示了一种可生物降解的潮解驱动人工花,突出了这种材料作为智能湿度驱动器的潜力,用于构建环境反应型仿生可持续机器人。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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