'We hope the project will inspire other engineers to develop robotics with sustainability in mind.”
The innovation could help change robot structure from rigid to flexible. These can function similarly to human muscles and assist robots in bending their arms.
The team first created a prototype of artificial muscle known as Hydraulically Amplified Self-Healing ELectrostatic actuators in 2018. Their goal, however, was to make this soft robot feature completely sustainable. In this new study, they described the use of sustainable materials to create the novel artificial muscle, without compromising its performance when compared to the one designed in 2018. They were successfully able to naturally dissolve the prototype in soil over a few months.
The team experimented with various materials to replace the plastic pouches before settling on a biodegradable polyester blend commonly used in shopping bags. The actuators were designed so that the robots are "soft and flexible enough to bounce off walls or squeeze into tight spaces," according to the official statement. In the future, the artificial muscle could be programmed to move robotic arms and legs. According to Rumley, one promising application for these soft robots is to assist physically impaired individuals.
“The sustainability of the new materials system now opens up very interesting avenues for applications that require components designed for single- or short-term use, for example, in the area of food handling or medical applications,” said Christoph Keplinger, co-founder of Artimus Robotics, a Boulder-based company that develops and sells HASEL actuators.
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