Towards a Temperature-Responsive Pinecone-Inspired Actuator Using Silicone Encapsulated Hydrogels
Towards a Temperature-Responsive Pinecone-Inspired Actuator Using Silicone Encapsulated Hydrogels
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DOI：
10.1007/978-3-030-24741-6_40
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
N. Walling;Hemma Philamore;K. Landenberger;F. Matsuno
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文献类型：
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作者：
N. Walling;Hemma Philamore;K. Landenberger;F. Matsuno
许多植物表现出对环境刺激的反应;由于温度和湿度的环境变化引起的水的渗透流入和流出导致细胞膨胀和收缩。水凝胶是含有亲水单元的超吸收性网络聚合物。水凝胶吸收水时产生的大应变类似于植物细胞通过与周围环境交换水来驱动驱动的行为。在这里，我们提出了一个软，硅胶致动器，水凝胶膨胀和收缩驱动。研究了驱动器产生的阻挡力。聚丙烯酸钠（2.91 N）和PMOVE（0.56 N）模拟植物响应环境刺激的致动。水凝胶在被动硅胶体内的新型封装增加了可实现的运动和阻挡力的复杂性。然而，由于水凝胶和周围水之间的接触表面减少，致动器表现出较慢的响应。通过利用水凝胶，我们提出了一种环境响应致动器，由水凝胶膨胀驱动，模仿双压电晶片驱动的植物，包括松果，响应于水合和脱水。
Many plants exhibit actuation in response to environmental stimuli; osmotic influx and efflux of water due to environmental changes in temperature and humidity causes cells to swell and contract. Hydrogels are superabsorbent networked polymers containing hydrophilic units. The large strains produced by hydrogels on the absorption of water resembles the behavior of plant cells that drive actuation through the exchange of water with the surrounding environment. Here we present a soft, silicone actuator, driven by hydrogel expansion and contraction. The blocking force produced by the actuator was investigated. Sodium polyacrylate (2.91 N) and PMOVE (0.56 N), imitate the actuation of plants in response to environmental stimuli. The novel encapsulation of hydrogel within a passive silicone body increased the complexity of motion achievable and blocking force. However, the actuator demonstrated a slower response due to reduced contact surface between the hydrogel and the surrounding water. By utilizing hydrogels, we present an environmentally responsive actuator, driven by hydrogel expansion, which mimics the bimorph actuation of plants, including pinecones, in response to hydration and dehydration.