Drives are used in many applications, from the mundane to the latest technologies such as robotics, artificial muscles and micromechanical systems. The conversion of energy into mechanical motion by an actuator can be achieved in many ways, the use of electricity, magnetism or heat. Electroactive polymers, which deform when exposed to an electric field, is a cheap and easy to use that can be used in actuator applications. A major problem that has hindered their wider use, but the low dielectric constant of these polymers, which means that a large voltage required to cause a reaction.
Bimetallic strip
Changhong Liu and colleagues from Tsinghua University in China have a polymer actuators that a large deformation in response to a relatively small program voltage1.
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