Thermally and magnetically responsive soft actuator with patterned structure
Belyaeva А.А.1,2, Morozova S.M.1,3
1 N.E. Bauman Moscow State Technical University, Moscow, Russia
2 Institute of Physiologically Active Compounds RAS, Chernogolovka, Russia
3 Moscow Institute of Physics and Technology, Dolgoprudny, Russia
Abstract
Plant movement-inspired actuators are promising for biomedical engineering as manipulators with soft materials and shape-memory implants. Obtaining several types of movement from an actuator is in demand.
In this work we have created a multi-stimulus actuator that takes a shape programmed due to the distribution of components. Two types of inks were developed using stimuli-responsive hydrogels based on cellulose nanocrystals and poly(N-isopropylacrylamide) (PNIPAM) for the fabrication of soft actuator. The thermal responsibility of the ink 1 was achieved by heating above the lower critical solution temperature of PNIPAM in the water, i.e. 32C. The magnetic properties of the ink 2 were due to the presence of biocompatible magnetite Fe3O4 in the composition. Actuator was formed by direct ink writing of two inks in a certain pattern. Depending on the initial pattern, it was possible to obtain various forms of the actuator, for example, roll, spiral and gripper. The combination of an independent response to stimuli and the ability to program the 3D structure of the actuator makes it perspective for the production of invasive medical devices.
Acknowledgements
This work was supported by the Russian Science Foundation (project №21-79-20113). This work was carried out using equipment of the St. Petersburg University Research Park.
Speaker
Belyaeva Anastasia
N.E. Bauman Moscow State Technical University, Moscow, Russia
Russia
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