Electromagnetic interference shielding of graphite/acrylonitrile butadiene styrene composites

Abstract

Dispersion of graphite within the acrylonitrile butadiene styrene matrix demonstrates enhanced electromagnetic interference shielding of composites through the use of tumble mixing technique. A shielding effectiveness of 60 dB with 15 wt % of graphite has been achieved. D shore hardness data revealed a little decrease in hardness of composites with rise in graphite content. DC conductivity measurements revealed a fairly low percolation threshold at 3 wt % of graphite. The conductivity exhibited by 15 wt % composite is 1.66 Â 10 À1 S/cm. These composites are fit for use as an effective and convenient EMI shielding material because of easy processing, better hardness, light weight, and, reasonable shielding efficiency.

Processing and characterization of conductive composites based on poly(styrene-b-ethylene-ran-butylene-b-styrene) (SEBS) and carbon additives: A comparative study of expanded graphite and carbon black

“…The shielding by reflection occurs when the material has mobile charge carriers which interact with the electromagnetic waves, whereas for the absorption of the EMI, the material should have electric and/or magnetic dipoles which interact with the electromagnetic field and is usually observed for materials with high dielectric constant and/or high magnetic permeability [5,7,12]. Fig.…”

Microwave shielding properties of Co/Ni attached to single walled carbon nanotubes

“…EMI SE of any material is the sum of contributions from absorption (SE A ), reection (SE R ) and multiple reections (SE M ) of the EM [23][24][25][26] as per the equation,…”

Shielding effectiveness measurements and uncertainty estimation for textiles by a VNA-based free space transmission method

“…An uncertainty budget is prepared for SE values using the measured S 21 dB and S 21 dB values based on equations (10), (11) and (12) and is given as a Table 4 for sample III. The term 'Uncertainty contribution' represents the uncertainty in each parameter or source and the individual contribution on measured S 21 .…”

“…For SE applications, materials with electromagnetic screening capabilities are generally used to attenuate the strength of electromagnetic fields in certain areas. A number of research groups have reported the development of cost effective new materials based on conducting polymers, composites and textiles for a number of reasons to use them as a shield [6][7][8][9][10][11]. The main objective of such R&D is searching a material with high EM absorption, minimum reflection and simpler production process with easy adaptability for applications.…”