Liner and Electroactive Polymer Prosthetic Socket

To address the OSD need for a proactive, dynamic, accommodating prosthetic socket, Physical Optics Corporation (POC) proposes to develop a new Liner and Electroactive Polymer Prosthetic Socket (LEAPPS), based on lightweight polymers that respond to externally applied electrostatic forces. LEAPPS incorporates an array of rectangular electroactive polymer (EAP) cells that function as individually controlled force actuators to dynamically adjust the socket fit. Capacitive sensors positioned within each cell relay the physical displacement of the actuator to an embedded microcontroller, enabling rapid compensation for external stresses and changes in musculature. An innovative multiple-layer socket liner utilizing active peristaltic motion and hydrophilic wicking fibers provides a comfortable fit and efficient moisture management. The proposed LEAPPS system not only addresses the major OSD requirements for a proactive, dynamic socket with a moisture-managing liner, but also has significant commercial applications, including prosthetic sockets for civilians as well as “smart” athletic wear. In Phase I, POC will demonstrate the feasibility of the LEAPPS system by building and testing bench-top prototypes. In Phase II, POC plans to build and test an advanced prototype in real world environments in conjunction with OSD.