科研之友
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摘要
Many idle green resources exist in nature, including water and moisture, which are ubiquitous but have no great value. In this work, we, for the first time, innovatively twisted a gel-state natural alginate fiber prepared by wet spinning to obtain a fiber-based actuator that shows remarkable performance under water and moisture stimulation. Owing to the excellent swelling and contraction properties in response to water, the twisted alginate fiber-based actuator underwent a rapid reversible rotational motion with a rotation speed of 13000 rpm and a revolution of over 400 turns. Moreover, the shape, as well as the performance, of the twisted fiber remained stable, even after 400 cycles. The excellent driving performance, simple preparation, low-cost production, and the industrialization development trend render the natural alginate fiber-based actuator a new type of green-energy material as a viable replacement for the existing torsional fiber-based actuators made of GO and nanotube materials. In addition, we designed the twisted fiber into a hydro-generator, a smart rainy curtain, breathable fabric, and a smart crane, which have great application prospects in future intelligent systems.
