Improving sound absorption property of polyurethane foams doped with natural fiber

International Research and Innovation Summit 2017

Azahari, M Shafiq M.^1 ; Rus, Anika Zafiah M.^1 ; Taufiq Zaliran, M.^1 ; Kormin, Shaharuddin^1

Sustainable Polymer Engineering, Advanced Manufacturing and Materials Center (SPEN-AMMC), Faculty of Mechanical and Manufacturing Engineering (FKMP), Universiti Tun Hussein Onn Malaysia (UTHM), Parit Raja, Johor, Batu Pahat

86400, Malaysia^1

关键词: Absorption frequencies;    Absorption levels;    Impedance tubes;    Low and high frequencies;    Polyurethane Foam;    Sound absorbing materials;    Sound absorption coefficients;    Sound absorption property;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/226/1/012009/pdf
DOI  :  10.1088/1757-899X/226/1/012009

来源: IOP

【 摘 要 】

This study investigates the acoustics behavior of wood fibre filler of Red Meranti - filled polyurethane foam as a sound absorbing material. Three different thicknesses have been selected which is 10 mm, 20 mm and 30 mm. By choosing percentage loading of Red Meranti (RM) wood fibre of 5%, 10%, 15% and 20% added with polymer foam is namely as polymer foam (PF) composites of PF5%, PF10%, PF15%and PF20%. The sound absorption coefficient (α) and pore structure of the foam samples have been examined by using Impedance Tube test and Scanning Electron Microscopy (SEM). The results revealed that the highest thickness of highest filler loading (PF20%)gives higher sound absorption coefficient (α). The absorption frequency level is observed at 0.9922 and 0.99889 which contributed from low and high frequency absorption level respectively. The smallest pores size structure was observed with highest filler loading of PF. The higher the thickness and the higher the percentage loading of wood filler gives smaller pore structure, consequently, increased the sound absorption coefficient level.