Electroless co-p coated nanocenosphere /polymer/filler composite for emi shielding effectiveness

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Author: 
Vynatheya, S., Raksha, G., Madhusudhana, R., Chandra Sagar, L. and Bheema Raju, V.
Abstract: 

Due to the increasing development of many types of communication technologies, the unnecessary impacts of electromagnetic radiations on humans and electronic systems are increasing. Therefore it is very essential to decrease the Electromagnetic Interference (EMI) and its effect on humans, instruments and electronic devices. In the present study, Electroless Cobalt Phosphorous alloy (Co-P) Coated Nanocenosphere / polymer/filler Composites has been proposed for their EMI shielding Effectiveness. The Process involves making the polymer composite conductive by uniform dispersion of Co-P Coated Nanocenosphere (CPCNC) in the polymer matrix and to increase wave absorption by making the polymer-based composite sheet in the device resistant to EMI and hence increasing EMI shielding effectiveness. Here, EDX (Energy Dispersive X-Ray) examination confirmed the presence of Co andP on the coated Nanocenosphere as well as on the CPCNC incorporated composite sheet which was further proved by Phase investigation by XRD (X-Ray Diffractometer).Conductivity measurements showed that the composite with 30% CPCNC in ABS had good conductivity of 0.023S/m. Attempts were also made to increase conductivity by incorporating conducting nano fillers like Graphene and Multiwalled Carbon Nano Tubes (MWCNT) along with CPCNC in small percentages (up to 1%). The conductivity of the 10% Graphene / MWCNT added CPCNC (20%) in ABS polymer was measured to be 0.03S/m. There was improvement in EMI shielding effectiveness with addition of conducting filler.

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