Green Robotics


The use of biodegradable materials such as papers and gelatin enables the creation of environmentally friendly soft robotic devices that can to return to the soil.


Biodegradable materials change their properties by microbial decomposition. Therefore, the characteristics of biodegradable actuators change from time to time during the degradation process. In this study, we have analyzed the properties of a mixture of gelatin and glycerol as a biodegradable material. A simulation environment reflecting the experimental results has been constructed that allows prediction of the behavior of the actuator under the degradation process.

Toshiaki Nagai, Ashitaka Kurita and Jun Shintake. "Characterization of sustainable robotic materials and finite element analysis of soft actuators under biodegradation." Frontiers in Robotics and AI 8, 383 (2021).
永井敏輝,新竹純,生分解性材料に基づくソフトアクチュエータのシミュレーションによる解析,ロボティクス・メカトロニクス講演会,1P2-A05, 2020.
T. Nagai, J. Shintake, Characterization of bio-degradable materials for soft robotics, in IEEE International Symposium on Micro-NanoMechatronics and Human Science (MHS), 2019.


Conventional devices using paper substrates are vulnerable to bending and large deformation. In this study, we have shown that the incorporation of kirigami design allows maintaining electrical conductivity even when the device is completely folded. Our kirigami based design strategy is applicable to fabrication of actuators, sensors, and robots.

T. H. Yang, H. Hida, D. Ichige, J. Mizuno, C. R. Kao, J. Shintake, Foldable kirigami paper electronics, Physica Status Solidi A: Applications and Materials Science, vol. 217, no. 9, p. 1900891, 2020.