Abstract
Low-voltage soft actuators with large displacement, long actuation durability, and fast response time have aroused great attention in soft robotics, wearable devices, haptic devices, and implantable or disposal biomedical devices. Herein, we report a low-voltage electroactive ionic soft actuator based on the sulfonated cellulose nanowhisker (SCN), microfibrillated cellulose (MFC), ionic liquids (IL), and graphene nanoplatelet (GN). The proposed SCN/MFC-IL-GN (0.1wt%) actuator demonstrated a large bending displacement (6.6 mm under ± 1 V sinusoidal input signal at 0.1 Hz, low driving voltage (as low as 0.25 V), wide actuation frequency (0.1 to 5.0 Hz), and long actuation durability (96.7% retention for 1 h), all of which stemmed from the strong crosslinking and ionic interactions among the functional sulfonated groups of SCN, hydroxyl groups of MFC, IL, and GN. Furthermore, the designed actuator was successfully employed to imitate the human finger’s behaviors including turning on/off the flashlight and sliding electronic photographs on a smart phone screen. Therefore, the proposed SCN/MFC-IL-GN actuator has great potential in artificial muscles, soft robots, haptic devices, and wearable devices because of its low excitation voltage, large bending displacement, long actuation durability, and biofriendly property.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51905487), Natural Science Foundation of Zhejiang Province (LY21E050023), and the Science Foundation of Zhejiang Sci-Tech University (ZSTU) (18022220-Y).
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National Natural Science Foundation of China, 51905487, Fan Wang, Natural Science Foundation of Zhejiang Province, LY21E050023, Fan Wang
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Wang, F., Wang, L., Wu, Z. et al. A low-voltage electro-ionic soft actuator based on graphene nanoplatelets-sulfonated cellulose nanowhisker combined with microfibrillated cellulose. J Mater Sci 58, 466–477 (2023). https://doi.org/10.1007/s10853-022-08061-3
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DOI: https://doi.org/10.1007/s10853-022-08061-3