Influences of Thickness and Fabric for Sound Absorption of Biopolymer Composite

Abstract:

Biopolymer foam was prepared by the reaction of bio-monomer based on vegetable oil with commercial Polymethane Polyphenyl Isocyanate (Modified Polymeric-MDI). The acoustic study of biopolymer foam was examined by impedance tube test according to the ASTM E-1050 and laminated with three types of textile such as polyester, cotton and single knitted jersey. It was revealed that the thicker the fabric the higher the sound absorption coefficient (α) at medium frequency level. The higher the number of layers or thickness of the fabric, the sound absorption through the fabric increases at medium frequency but after the maximum it remains almost unaltered. Three layer of cotton fabric gives maximum α approximately equal to 1 which is 1.104 mm thickness at frequency level of 3000-3500Hz and single knitted jersey gives maximum α at 4^th layer of 2200-2700Hz. Meanwhile , the α of biopolymer foam laminated with polyester fabric approximately equal to 1 at lower frequency level of 2000-3000Hz with lower thickness that is 0.668mm. Polyester fabric with lowest thickness shows better α at lower frequency level due to the structure of the fabric. The relationships among the fiber properties such as fiber density, fiber diameter, and fibrous material layer were considered as a factor that influences the sound absorption property.

• Periodical: Applied Mechanics and Materials (Volume 393)
• Pages: 102-107
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.393.102
• Online since: September 2013
• Authors: Nik Normunira Mat Hassan, Anika Zafiah Mohd Rus
• Keywords: Methylene Diphenyl Diisocyanate (MDI), Polyester Fabric, Sound Absorption

References

[1] Hoda S. Seddeq, Factors Influencing Acoustic Performance of Sound Absorptive Materials, Australian Journal of Basic and Applied Sciences, (2009).

[2] Zhou Hong, Bo, L., Guangsu, H., Jia, H., A Novel Composite Sound Absorber with Recycled Rubber Particles. Journal Sound Vibration 2007, 304: 400–6, (2007).

DOI: 10.1016/j.jsv.2007.02.024

[3] Mevlut Tascan adnd Edward A. Vaughn. Effect of Total Surface Area and Fabric Density on the Acoustical Behaviour of Needlepunched Nonwoven Fabric. Textile Research Journal. Vol 78, (2008) p.289.

DOI: 10.1177/0040517507084283

[4] Merve Kucukali, Banu Uygun Nergis, Cevza Candan. A Study of the Influences of Fabric Structure on Sound Absorption Behavior of Spacer Knitted Structures. 7th International Conference-TEXSCI (2010).

[5] Abd. -El Fattah., A. Mahmuod., Khaled E. El-Nagar. Characterization of the Acoustic Behaviours of Laminated Polyester Fabric using Different Adhesion Systems. Australian Journal of Asic And Applied Sciences vol 4, (2008) 96-101.

[6] Anika Zafiah, M.R.: Effect of Titanium Dioxide on Material Properties for Renewable Rapeseed and Sunflower Polyurethane, International Journal of Integrated Engineering (Issues on Mechanical, Materials and Manufacturing Engineering), Vol. 1 (2009).

[7] Anika Zafiah M. Rus., Degradation Studies of Polyurethanes Based On Vegetables Oils. (Part I)., Prog in Reaction Kinetic And Mechanism, Science Reviews, vol 33 (2008), pp.363-391.

[8] Anika Zafiah M. Rus, Material Properties of Novelty Polyurethane Based On Vegetable Oils, The 11th International Conference on QiR (Quality in Research), Depok, Indonesia, 3-6 August (2009).

[9] Anika Zafiah, M.R.: Degradation Studies of Polyurethanes Based on Vegetable Oils. Part 2; Thermal Degradation and Materials Properties, Prog React Kinetic and Mechanism, Science Reviews, Vol. 34 (2009), pp.1-43.

[10] D. V Parikh, Y. Chen and L. Sun. Reducing Automotive Interior Noise with Natural Fiber Nonwoven Floor Covering System. Textile Research Journal. Vol 76 (2006), pp.813-820.

DOI: 10.1177/0040517506063393

[11] Surajit Sengupa. Sound Reduction by Needle-punched Nonwoven Fabric. Indian Journal of Fibre & textile Research. Vol 35 (2010), pp.237-242.

[12] Anika Zafiah, M.R., Nik Normunira, M.H. And Nurulsaidatulsyida, S. Influence Of Biopolymer Doped With Eco-Fillers As Sound Absorption Materials. Global Engineers & Technologists Review (2012) Vol. 2 No. 4.

[13] Allard, J.F., C. Depollier, and P. Guignouard, Free Field Surface Impedance Measurements of Sound-Absorbing Materials With Surface Coatings. Applied Acoustics, 1989. 26(3): pp.199-207.

DOI: 10.1016/0003-682x(89)90053-4