Permittivity and Electromagnetic Interference Shielding Investigations of Activated Charcoal Loaded Acrylic Coating Compositions. (4th May 2014)

• Record Type: Journal Article
• Authors: Khan, Sharief ud Din; Arora, Manju; Wahab, M. A.; Saini, Parveen
• Other Names: Grohens Yves Academic Editor.
• Is Part Of: Journal of polymers. Volume 2014(2014)
• Publication Date: 2014-05-04
• Subjects: Polymers -- Periodicals; Polymers; Electronic journals; Periodicals; 547.7
• DOI: 10.1155/2014/193058
• Languages: English
• ISSNs: 2356-7570

Abstract

Abstract : Acrylic resin (AR) based electromagnetic interference (EMI) shielding composites have been prepared by incorporation of up to 30 wt% activated charcoal (AC) in AR matrix. These composites have been characterized by XRD, Raman spectroscopy, scanning electron microscopy, dielectric, and EMI shielding measurement techniques. XRD patterns and Raman studies confirm the incorporation of AC particles inside AR matrix and suggest possible interactions between phases. The SEM images show that incorporation of AC particles leads to systematic change in the morphology of composites especially the formation of porous structure. The dielectric measurements show that 30 wt% AC loading composite display higher relative permittivity value (~79) compared to pristine AR (~5). Further, the porous structure, electrical conductivity, and permittivity value contribute towards EMI shielding effectiveness value of −36 dB (attenuation of >99.9% of incident radiation) for these composites, thereby demonstrating their suitability for making efficient EMI shielding coatings.