Lightweight Electromagnetic Interference (EMI) Shielding System for Aircraft Avionics

There is an unmet need in the US Navy for improved EMI shielding materials that can reduce signal interference between electronic equipment. Metals are a primary component in currently used EMI shields. Consequently, the shielding materials are heavy, and not optimally suitable for use in avionic electronic equipment. In the Phase I program, we propose to demonstrate the feasibility of a novel polymer/CNT nanocomposite material with enhanced electrical conductivity and EMI shielding effectiveness, compared to the state of the art metallic materials. A key aspect of the proposed program is that it utilizes a novel polymer morphology that results in a small concentration of CNTs leading to the desired electrical properties. The novel polymer/CNT nanocomposite material is expected to fulfill the materials property requirements for shielding avionic electronic equipment, particularly EMI shielding effectiveness and strength. A key advantage of the proposed nanocomposite material is that it can be made into a conductive heat shrink tubing, which can be applied to existing cable systems with a simple heat shrink treatment. The new materials will provide the Navy with a lightweight, durable, and long-lasting alternative to traditional metal braids. The Phase I program will demonstrate proof of concept on compression molded flat panels. The Phase II program will build upon the Phase I demonstration effort by implementing the technology in conductive heat shrink tubings for EMI shielding for the US Navy.