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Published Article / ENY-ARTICLE-2012-330

Composites Made of Polypropylene Nonwoven Fabric with Plasmas Layers

Jaroszewski, M (Wrocław University of Technology) ; Pospieszna, J (Wrocław University of Technology) ; Ziaja, J (Wrocław University of Technology) ; Ozimek, M (Wrocław University of Technology)


Abstract: Engineering of materials used for shielding from electromagnetic fields is currently one of the most extensively developing field of applications of composite materials (Bula et al., 2006; Jaroszewski & Ziaja, 2010; Koprowska et al., 2004, 2008; Sarto et al. 2003, 2005; Wei et al., 2006; Ziaja et al., 2008, 2009, 2010). The choice of suitable materials for the shields and their appropriate arrangement have an essential meaning. Development of lightweight and resistant to environmental exposure shielding materials is possible by using substrates of polypropylene and plasma technology (Ziaja&Jaroszewski, 2011). The shields for suppression of electric field were made in the form of composites of polypropylene unwoven fabrics with deposited plasma layers. Additional advantage of the application of the method is the possibility of plasma cleaning of a fabric surface and modifying its surface properties. The unique properties of pulse plasma make possible to obtain metallic and dielectric coatings on polypropylene fabrics, which are not achievable by standard methods. The coatings are characterized by a good adhesion to the substrates. The surface of the samples was examined in two ways: by metallurgical microscope Nikon MA200 and scanning microscope Quanta 200 in the low vacuum mode. To identify the structure of the obtained layers the X-Ray radiography was used. Additionally properties of the composites was studied using impedance spectroscopy. The method of impedance spectroscopy allows one to connect the measured frequency characteristics with the physical structure of tested material and the alternations in the structure. This method has been used by the authors to determine the properties of plasma layers deposited on a polypropylene nonwoven fabric (Jaroszewski et al., 2010a; Pospieszna et al., 2010; Pospieszna et al., 2010b).

Keyword(s): polypropylene ; magnetron ; plasma ; thin layer ; composite ; electromagnetic ; shielding ; impedance spectroscopy ; dielectric spectroscopy ; shielding effectiveness ; x-ray
Note: Maciej Jaroszewski, Janina Pospieszna, Jan Ziaja and Mariusz Ozimek (2012). Composites Made of Polypropylene Nonwoven Fabric with Plasmas Layers, Polypropylene, Dr. Fatih Dogan (Ed.), ISBN: 978-953-51-0636-4, InTech, Available from:

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