Electromagnetic Interference

Abstract

Space vehicles encounter an unpleasant environment in space with dangers such as extreme temperatures, solar radiation, out-gassing, debris, and micrometeoroids. The cost of launching systems into space is extremely high and stands between $10,000/lb-$12,000/lb. As a result, there is an emergent requirement of weight/cost reduction for future space systems that still comply with the rigorous specifications to properly function in space. This study focuses on the potential utilization of nanocomposite materials for satellite structures as a solution to reduce system weight while retaining the desired survivability against electromagnetic interference (EMI). Four, eight-ply nanocomposite panels were fabricated from Cycom 5575-2 glass with multi-walled carbon nanotube (MWNT) plies. The control panel had eight plies of glass fabric reinforced composite only and will be referred to as 8G. This enabled the comparison of all properties with and without carbon nanotubes (CNTs). The other three panels had differences in the placement of layers containing CNTs: the first one had four CNT plies on one half with four plies of glass on the opposite half and will be referred to as 4G/4CNT, the second one had two plies of CNT on the exterior of each side with four plies of glass in the middle and will be referred to as 2CNT/4G/2CNT, and the third one had alternating CNT/glass fabric plies across the thickness and will be referred to as (G/CNT) 4. These four configurations were measured for their respective EMI shielding properties after experiencing monotonic tension load, thermal cycling, and a combination Institute of Technology laboratory technicians, Dr. Volodymyr Sabelkin, and Air Force Research Lab personnel who continuously afforded me with the assistance and expertise needed in the laboratories. My beloved wife for having lovingly endured and sacrificed much in order to grant me the time required to complete my thesis. Lastly, to the one who breathes life into me and gives every good gift, Jesus Christ.