Achieving High-Speed Retraction in Stretchable Hydrogels
Achieving High-Speed Retraction in Stretchable Hydrogels
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DOI：
10.1021/acsami.0c08132
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发表时间：
2020-09-09
影响因子：
9.5
通讯作者：
Kundu, Santanu
中科院分区：
文献类型：
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作者：
Prado, Rosa Maria Badani;Mishra, Satish;Kundu, Santanu
水凝胶模仿弹性体生物聚合物，如节枝弹性蛋白，负责生物物种的运动，喂养和防御所需的功率放大活动，在软机器人和假肢中有应用。在这里，我们报告了通过自由基聚合反应合成的生物启发水凝胶。通过保持亲水性和疏水性组分之间的平衡，我们获得了弹性模量高达100 kPa，拉伸性高达800%，弹性高达98%的凝胶。这些特性使这些凝胶能够弹射抛射体。此外，当从拉伸状态释放时，这些凝胶实现16 m s（-1）的收缩速度和4 x 10（3）m s（-2）的加速度，并且这些值与在功率放大过程中在许多生物物种中观察到的值相当。通过利用和调整这里使用的简单合成策略，这些凝胶可用于需要功率放大的软机器人，假肢和工程设备。
Hydrogels mimicking elastomeric biopolymers such as resilin, responsible for power-amplified activities in biological species necessary for locomotion, feeding, and defense have applications in soft robotics and prosthetics. Here, we report a bioinspired hydrogel synthesized through a free-radical polymerization reaction. By maintaining a balance between the hydrophilic and hydrophobic components, we obtain gels with an elastic modulus as high as 100 kPa, stretchability up to 800%, and resilience up to 98%. Such properties enable these gels to catapult projectiles. Furthermore, these gels achieve a retraction velocity of 16 m s(-1) with an acceleration of 4 x 10(3) m s(-2) when released from a stretched state, and these values are comparable to those observed in many biological species during a power amplification process. By utilizing and tuning the simple synthetic strategy used here, these gels can be used in soft robotics, prosthetics, and engineered devices where power amplification is desired.