SBIR-STTR Award

The successful execution of this Phase I initiative will develop an optimized electromagnetic interference (EMI) and radio frequency interference (RFI) shielding fabric by electrodepositing metallic micro-layers of copper and a newly developed nanocrystalline ferromagnetic shielding alloy (Nanovate EM) a lightweight polymeric fabric, such as PET, and applying a final layer of paint. By this design, mid to super-high frequency EMI/RFI radiation will be shielding by the copper micro-layer, while low to mid frequency EMI/RFI radiation will be shielding by the Nanovate EM micro-layer. Additionally, the Nanovate EM layer will provide strength, durability, and wear resistance. The final paint layer will be applied for lightweight corrosion protection, mildew resistance, and to meet the color requirements. The primary acceptance criteria for this Phase I proposal will be a demonstration that the shielding fabric complies with the physical performance specifications (outlined by MIL-PRF-44103D) and the EMI/RFI shielding performance specifications while maintaining a weight less than 15 oz/yd2 and a full-scale production cost less than 30 $/yd2. It is anticipated that the Nanovate EM enabled fabric design will provide the necessary performance properties to meet the product requirements.

Keywords:
Nanostructured, Lightweight, Electromagnetic Interference, Radio Frequency Interference, Shielding Fabric, Soft Walled Shelter, Durable, Attenuation

This Phase II proposal addresses a current need relevant to the US military: a lightweight and durable electromagnetic interference (EMI) and radio frequency interference (RFI) shielding fabric, with EMI/RFI shielding across a wide frequency range. To address this statement of need, a scale-up demonstration/validation program is proposed, based upon the previous Phase I results and on-going proprietary developments by the applicant using a cost-effective electrosynthesis of nanostructured alloys for electromagnetic shielding (Nanovate™ EM). Phase II is intended to use the material developed in Phase I to produce a full scale 3D prototype of Nanovate™ EM shielding fabric to be incorporated as a liner in a soft walled shelter. The full scale system will also address key factors in maintaining an effective shield, such as continuity of conductivity along the seams, in corners, and around fenestration. The main technical objectives of the proposed Phase II program are to: (1) construct and demonstrate/validate a system that is capable of continuously coating metalized fabrics with Nanovate™ EM, (2) validate and where required improve upon the fabric’s physical performance, (3) fabricate a full-scale 3D prototype of the shielding for a soft walled shelter using the Nanovate™ EM shielding fabric liner, and (4) validate that the fabric’s EMI/RFI shielding performance meets the specified requirements.

Keywords:
Nanocrystalline Alloy, Electrodeposition, Electromagnetic Shielding, Fabrics