Manufacturing of PAN or PU Nanofiber Layers/PET Nonwoven Composite as Highly Effective Sound Absorbers

• Published in: Advances in polymer technology Vol. 33; no. 4; pp. np - n/a
• Main Authors: Rabbi, Amir, Bahrambeygi, Hossein, Nasouri, Komeil, Shoushtari, Ahmad Mousavi, Babaei, Mohammad Reza
• Format: Journal Article
• Language: English
• Published: Hoboken, NJ Blackwell Publishing Ltd 01.12.2014; Wiley
• Subjects: Applied sciences; Composite; Composites; Constants; Density; Exact sciences and technology; Forms of application and semi-finished materials; Nanofiber; Nanostructure; Optimization; Plutonium; Polymer industry, paints, wood; Response surface methodology; Sound; Sound absorption; Surface chemistry; Technology of polymers; Weight reduction; Ethylene terephthalate polymer; Composite; Synthetic fiber; Sandwich structure; Electrospinning; Nanofiber; Absorptivity; Response surface methodology; Acoustic absorption; Experimental study; Dimension spectrum; Optimization; Acoustic properties; Acrylonitrile polymer; Morphology; Polyurethane; Acoustic baffle; Nanocomposite; Non woven material; Property structure relationship; Manufacturing; Sound absorption
• ISSN: 0730-6679; 1098-2329
• DOI: 10.1002/adv.21425

ABSTRACT The main aim of this study was to investigate the usability of polyurethane (PU) and polyacrylonitrile (PAN) nanofibers for improving the sound absorption of conventional polyester nonwovens in wide band of frequencies along with weight and thickness reduction. The effect of nanofiber and nonwoven layers number, nanofiber layers surface density, and the type of nanofiber polymer on the sound absorption was studied. To find the optimum conditions for achieving high sound absorption, response surface methodology was used. The results showed that the sound absorption of composite samples is improved when the nanofiber layer number or its surface density increased. The results also showed that the sound absorption of composites is enhanced by using PAN instead of PU. At a constant surface density, the higher resonant peak, without shifting, was achieved with increasing the nanofiber layers number. Optimization process showed that samples containing PAN nanofiber layers with surface density of 4.72 g/m2 and six nonwoven layers have highest average sound absorption coefficient.