Nickel coated flyash (Ni-FAC) cenosphere doped polyaniline composite film for electromagnetic shielding. (6th March 2015)

• Record Type: Journal Article
• Authors: Bora, Pritom J; Vinoy, K J; Ramamurthy, Praveen C; Kishore, ; Madras, Giridhar
• Is Part Of: Materials research express. Volume 2:Number 3(2015)
• Publication Date: 2015-03-06
• Subjects: fly ash cenosphere (FAC) -- nickel coated FAC -- polyaniline -- electromagnetic interference shielding; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/2/3/036403
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: A solid waste material fly ash cenosphere (FAC) was nickel coated and polyaniline in situ polymerized at −30 ± 2 °C in nitrogen atmosphere. A thin film of this composite material was prepared by solution processing and surface morphology/topography was studied. High electromagnetic shielding effectiveness (SE) was obtained for this film; 59 ± 4 μ m and 133 ± 4 μ m films show an average of 38 and 60 dB SE, respectively, in the frequency range 8.2–12.4 GHz (X-band). Unlike PANI film, the SE of these composite films is high at high frequency. The presence of magneto dielectric microsphere (Ni-FAC) increases the heterogeneity of the composite film in an efficient way for EMI shielding by changing film topography and increasing ac conductivity and permeability.