Researchers have made new breakthroughs that may have a major impact on future robots. This breakthrough is a new type of metal-elastomer composite that can heal itself and create new electrical connections that bypass the damaged area. This new material can be used not only for robots, but also for areas such as telescopic circuits, soft machines, bio-inspired robots, and wearable electronic devices.
Prior to this study, the problem with soft and deformable circuits was that the soft structure was easily torn, punctured or mechanically damaged. This means that the loss of conductivity causes the circuit to be unusable. This new material is a soft silicone rubber embedded in droplets of micron-sized gallium-indium based metal alloys that are liquid at room temperature.
The circuitry in the material is made with a pen plotter that breaks the droplets and makes them conductive. Magidi said that the result is a mechanically supple skin that is highly stretchable and soft like natural skin. If the circuit trace is damaged, the liquid around the damaged area breaks and forms a new conductive path.
This allows bypassing the damaged area and rerouting the electrical signal without interruption. Researchers of the project have demonstrated this material in self-healing digital counters and self-healing flexible robot quadrupeds that can function after severe injuries. Researchers plan to design and study a soft, conductive material that can then heal electrical and mechanical damage.
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