Tunable Actuation of Humidity-Driven Artificial Muscles via Graphene Nanofillers
Tunable Actuation of Humidity-Driven Artificial Muscles via Graphene Nanofillers
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DOI：
10.1021/acsapm.2c01107
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发表时间：
2022-11
影响因子：
5
通讯作者：
S. Sarikaya;Frank Gardea;Hannah Strong;Jeffrey T. Auletta;D. Mackie;M. Naraghi
中科院分区：
文献类型：
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作者：
S. Sarikaya;Frank Gardea;Hannah Strong;Jeffrey T. Auletta;D. Mackie;M. Naraghi
湿度响应型软执行器可以由外部刺激驱动，并提供仿生环境适应。在这里，我们报告了一种磺化聚醚醚酮的湿度响应轴向软致动器，它在嵌入石墨烯纳米片（GNP）时表现出极大的可定制的致动性能。实验数据分析表明，仅添加0.5 wt%的GNP即可使驱动增加50%，并提供24%的最大驱动行程和230 J/kg的工作能力。此外，0.5 wt% GNP 有助于更快的驱动，显着提高收缩和扩张速率。然而，添加 1 wt% GNP 会略微降低驱动幅度。非单调驱动性能与离子交换容量、吸水量和国民生产总值分散度相关。通过利用 GNP 的驱动幅度可调性，轴向执行器被转换为由相同材料系统的纤维组成的两个活性层堆叠而成的行走机器人。双层机器人表现出响应湿度变化的自我爬行和运动能力。这项研究展示了一种独特的可调湿度执行器，可以演示线性和弯曲驱动。
Humidity-responsive soft actuators can be driven by external stimuli and provide biomimetic environmental adaptations. Here, we report a humidity-responsive axial soft actuator of sulfonated polyether ether ketone which shows greatly tailorable actuation performance upon embedding graphene nanoplatelets (GNPs). Analysis of the experimental data shows that adding only 0.5 wt % GNP increases the actuation by 50% and provides a maximum actuation stroke of 24% and work capacity of 230 J/kg. In addition, 0.5 wt % GNP facilitates faster actuation, with significantly enhanced rates of both contraction and expansion. However, the addition of 1 wt % GNP slightly decreases the actuation magnitude. The nonmonotonic actuation performance was correlated with ion exchange capacity, water uptake, and GNP dispersion. By utilizing actuation magnitude tunability via GNP, the axial actuators were converted into a walking robot stacked of two active layers consisting of fibers of the same material system. The bilayer robot demonstrated self-crawling and locomotion ability in response to humidity changes. This study shows a uniquely tunable humidity actuator that demonstrates linear and bending actuation.