Carbon Nanofiber Mats for Electromagnetic Interference Shielding
Carbon 111 (2017) 529e537 Contents lists available at ScienceDirect Carbon journal homepage: www.elsevier.com/locate/carbon Carbon nanofiber mats for electromagnetic interference shielding * Xinghua Hong a, b, D.D.L. Chung a, a Composite Materials Research Laboratory, Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260-4400, USA b Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China article info abstract Article history: This paper reports the electromagnetic interference shielding effectiveness of carbon nanofiber (CNF, Received 13 September 2016 originally called carbon filament) mats made from 0.16-mm-diameter catalytically grown CNFs by the Received in revised form paper-making process (1.7e13.1 MPa compaction pressure). These low-cost lightweight binderless mats 13 October 2016 (2.9e5.4 mm thick, 0.13e0.22 g/cm3 bulk density, 6.1e10 vol% solid) provide high shielding effectiveness Accepted 14 October 2016 (SE,52e81 dB, 1.5 GHz) and high SE/density (370e470 dB cm3/g), though SE/thickness is low (14e18 dB/ Available online 14 October 2016 mm). Compared to the spun CNF mats of prior work, they exhibit higher SE, but lower SE/thickness. With consideration of SE, SE/thickness, and SE/density, the CNF mats are superior to graphene aerogel, reduced-graphene-oxide polyurethane foam and reduced-graphene-oxide aerogel of prior work, but are inferior to carbon nanotube mats, graphene film, carbon foam and flexible graphite of prior work. Ab- sorption is the dominant shielding mechanism of CNF mats, so both SE and absorption loss tend to decrease with decreasing thickness.
[Show full text]