Electromagnetic interference shielding conductive coatings

Polypyrrole Apolymer of pyrrole, afive-membered heterocyclic substance with one nitrogen and four carbon atoms and with two double bonds. The polymer can be prepared via electrochemical polymerization. Polymers thus prepared are doped by electrolyte anion and are electrically conductive. Polypyrrole is used in lightweight secondary batteries, as electromagnetic interference shielding, anodic coatings, photoconductors, solar cells, and transistors. 

X. Jing, Y. Wang, B. Zhang, Electrical Conductivity and Electromagnetic Interference Shielding of Polyaniline/Polyacrylate Composite Coatings. / Appl Polym Sci 2005, 98, 2149-2156. 

Finally, SWCNT concentrations higher than 0.3 and 3wt%, respectively are sufficient for applications in electrostatic painting and electromagnetic interference shielding, respectively (Figure 10.8). Other applications of electrically conductive CNT-polymer composites are in printable circuit wiring and as transparent conductive coatings. 

Conjugated polymers demonstrate reasonable electrical conductivity which can be used in antistatic coatings, electronic devices, batteries, electromagnetic interference (EMI) shielding, electrochromic devices, optical switching devices, sensors, and textiles. ... 

Keywords antistatic, conductivity, insulator, electric resistance, electromagnetic shielding, EMI, radio-frequency interference shielding, RFI, percolation, carbon black, carbon fiber, fillers, BET surface, metal-coated fibers, semiconductor, antistatic compounds, conductive fillers. 

EMI Shielding. Syntactic foams based on carbon microballoons or silver-coated ceramic microballoons can be used for shielding against electromagnetic interference (EMI) (23). Such syntactic foams can provide the requisite electrical conductivity at very low density, thus avoiding the weight penalty imposed by conventional EMI shielding techniques. 

Carbon fibers are being considered for electromagnetic interference (EMI) shields. The fibers are sometimes coated with nickel by electroplating to increase the electrical conductivity, and molded in the form of sheets with a polymer such as polycarbonate.I ... 

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