This technology relates to a humidity-responsive actuator that operates without external electrical energy by utilizing the expansion of a moisture-responsive layer and the asymmetric behavior of an inert layer in response to changes in relative humidity, as well as its manufacturing method and a robot incorporating the same.
Conventional actuators require an external power supply, leading to a high dependency on energy sources and the need for additional wiring and power devices.
This technology proposes a method of stacking a moisture-responsive layer of unidirectionally aligned nanofibers formed by electrospinning with a moisture-inert layer. By implementing a driving unit that undergoes mechanical bending and straightening due to humidity differences, it provides an actuator that operates solely on environmental energy without the need for an external power source. Applicable to environment-responsive smart materials, self-powered sensors, and self-driven robots, it presents the potential for next-generation actuators free from the constraints of batteries and wiring.
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