Electromagnetic shielding materials

Electrically conductive polymers can be used also as shielding materials against electromagnetic interference (EMI), if they are incorporated as homogeneous fillers 

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Examples of conductive ABS polymer composites include electromagnetic shielding materials (56,57) and electrically conductive composite plastic sheets, which may be used for packaging of integrated circuit devices (58,59). 

Catalyst-assisted CVD processes can also be used to fabricate delicate microcomponents. Coiled fibres of carbon and refractory carbides are examples of such components which may be used in functional applications such as microsprings, microsensors and fillers of electromagnetic shielding materials. The microstructure of some coiled fibres is shown in Figure 3.39a. The device for the production of coiled fibre fabrication is shown in Figure 3.39b. A graphite plate substrate is placed at the central part of a horizontal CVD reaction chamber, and a metal... 

J. D. Sudha, S. Sivakala, R. Prasanth, V. L. Reena, and P. Radhakrishnan Nair, Development of electromagnetic shielding materials from the conductive blends of polyaniline and polyaniline-clay nanocomposite-EVA Preparation and properties. Compos. Sci. Technol., 69, 358-364 (2009). 

Y. Waku, M. Suzuki, Y. Oda and Y. Kamitoku, Electromagnetic Shielding Material, Jtpanese Patent 09074298 A (1997). 

Polymer surfaces are modified by plasma techniques for interfacial enhancement [4-10], Au, Ag, Pd, Cu and Ni were coated on poly (methylmethacrylate) (PMMA) by barrel technique [11]. Coating of A1 alloys on PET was compared with Ti layer under A1 alloys [12]. Thin Aluminum oxide coatings have been deposited on various uncoated papers, polymer-coated papers and plain polymer films using atomic layer deposition technique [13]. The isotactic polypropylene (iPP) and A1 composite is widely used as television cable electromagnetic shielding materials [14], The reflection of infrared light depends on geometry of the surface of alumi-... 

Sudha, J.D., Sivakala, S., Patel, K., and Nair, P,R, (2010) Development of electromagnetic shielding materials from the conductive blends of polystyrene polyaniline-clay nanocomposite. Compos. Part A, 41,1647-1652. 

The British company Baltex uses the knitting technology to incorporate metal wires in textile stmctures. Their fabrics, which they commercialize under the name Feratec , can be used mainly for two purposes, namely heatable textiles and electromagnetic shielding materials (Baltex, 2014). 

The application of palladium-catalyzed A -arylation reactions to the synthesis of polymers has attracted considerable attention due to the interesting electronic properties of these materials [6, 8, 11], For example, polyaniline has been utilized in anti-static materials, flexible electronics, and as electromagnetic shielding material. The first application of palladium-catalyzed amination reactions in polymer... 

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