Electroactive polymers (EAP) when stimulated by an electric field, these polymers exhibit a change in size and shape. Can be used as actuators or sensors. Diaelectric elastomers are material systems producing large strains. They transform electric energy into mechanical. These capacitors consist of elastomer film sandwiched between two compliant electrodes. When voltage is applied the electrode squeeze the elastomer film. The film contracts in the thickness direction and expands in the plane direction. When short-circuited elastomer film returns back to its original position.
vhb ( very high bond) polymer film 3M 4905
first electroactive polymer actuator test / vhb polymer, graphite powder, copper tape, acrylic frame
first electroactive polymer actuator test / after couple of weeks
application of electroactive polymer actuators and sensors:
haptic feedback / pumps / valves / robotics / prosthetics / power generation / active vibration control of structures / optical positioners such for auto-focus, zoom, image stabilization / sensing of force and pressure / active braille displays / speakers / deformable surfaces for optics and aerospace / energy harvesting