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Journal of Nanomaterials
Volume 2012 (2012), Article ID 643043, 4 pages
http://dx.doi.org/10.1155/2012/643043
Research Article

Different Structures of PVA Nanofibrous Membrane for Sound Absorption Application

1Department of Nonwovens, Faculty of Textile Engineering, Technical University of Liberec, Studentska 2, 46117 Liberec, Czech Republic
2Centre for Nanomaterials, Advanced Technologies and Innovations, Technical University of Liberec, Studentska 2, 46117 Liberec, Czech Republic

Received 12 December 2011; Revised 13 February 2012; Accepted 16 February 2012

Academic Editor: Tong Lin

Copyright © 2012 Jana Mohrova and Klara Kalinova. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The thin nanofibrous layer has different properties in the field of sound absorption in comparison with porous fibrous material which works on a principle of friction of air particles in contact with walls of pores. In case of the thin nanofibrous layer, which represents a sound absorber here, the energy of sonic waves is absorbed by the principle of membrane resonance. The structure of the membrane can play an important role in the process of converting the sonic energy to a different energy type. The vibration system acts differently depending on the presence of smooth fibers in the structure, amount of partly merged fibers, or structure of polymer foil as extreme. Polyvinyl alcohol (PVA) was used as a polymer because of its good water solubility. It is possible to influence the structure of nanofibrous layer during the production process thanks to this property of polyvinyl alcohol.