Ultrastrong and Highly Sensitive Fiber Microactuators Constructed by Force‐Reeled Silks,Advanced Science

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Ultrastrong and Highly Sensitive Fiber Microactuators Constructed by Force‐Reeled Silks
Advanced Science ( IF 14.3 ) Pub Date : 2020-01-16 , DOI: 10.1002/advs.201902743
Shihui Lin ₁ , Zhen Wang ₁ , Xinyan Chen ₁ , Jing Ren ₁ , Shengjie Ling ₁

Affiliation

Fiber microactuators are interesting in wide variety of emerging fields, including artificial muscles, biosensors, and wearable devices. In the present study, a robust, fast‐responsive, and humidity‐induced silk fiber microactuator is developed by integrating force‐reeling and yarn‐spinning techniques. The shape gradient, together with hierarchical rough surface, allows these silk fiber microactuators to respond rapidly to humidity. The silk fiber microactuator can reach maximum rotation speed of 6179.3° s⁻¹ in 4.8 s. Such a response speed (1030 rotations per minute) is comparable with the most advanced microactuators. Moreover, this microactuator generates 2.1 W kg⁻¹ of average actuation power, which is twice higher than fiber actuators constructed by cocoon silks. The actuating powers of silk fiber microactuators can be precisely programmed by controlling the number of fibers used. Lastly, theory predicts the observed performance merits of silk fiber microactuators toward inspiring the rational design of water‐induced microactuators.

中文翻译：

由力卷丝构建的超强、高灵敏度纤维微执行器

光纤微执行器在各种新兴领域都很有趣，包括人造肌肉、生物传感器和可穿戴设备。在本研究中，通过整合力卷绕和纺纱技术，开发了一种坚固、快速响应、湿度诱导的丝纤维微致动器。形状梯度以及分层粗糙表面使这些丝纤维微执行器能够快速响应湿度。丝纤维微执行器可以在4.8 s内达到6179.3° s ^-1的最大旋转速度。这样的响应速度（每分钟1030转）可与最先进的微执行器相媲美。此外，该微执行器产生2.1 W kg ^-1的平均驱动功率，比茧丝构造的纤维执行器高出两倍。丝纤维微致动器的驱动功率可以通过控制所使用的纤维数量来精确编程。最后，理论预测了观察到的丝纤维微执行器的性能优点，以启发水诱导微执行器的合理设计。

更新日期：2020-01-17

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