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Influence of UV irradiated on high doping TiO2 of polymer foam for acoustic study

Mohd Atan, Bainun Akmal (2014) Influence of UV irradiated on high doping TiO2 of polymer foam for acoustic study. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

In recent years, noise is one of the physical environmental factors affecting our health in today’s world. Noise can seriously affect people in noise sensitive locations and interfere with their ability to relax, sleep, or communicate, causing stress and annoyance. This study presents experimental and analytical of an investigation to determine sound absorption property of polymer foam of pure flexible polyurethane and high doping of titanium dioxide (TiO2) which are 20 %, 40 %, 60 %, 80 % and 100 %. The acoustic study of the samples was measured by using impedance tube test according to the ASTM E-1050 to determined sound absorption coefficient (α) and noise reduction coefficient method (NRC). Polymer foam as well-known as acoustical material expected to be improved by adding high doped of TiO2. Titanium dioxide represents an effective photocatalyst for water and air purification and for self-cleaning surfaces. Additionally, it can be used as antibacterial agent because of strong oxidation activity and superhydrophilicity. Besides that, the impact of UV on polymers is used for modification of properties (roughness, hydrophobicity) of polymer surfaces. The highest sound absorption coefficient is 0.999 observed from the flexible polymer foam doped with 60 % of TiO2 at high frequency level of 4000 Hz. After UV irradiation, the maximum frequency level has been shifted to the higher position level based on flexible polymer foam doped with 60 % to 100 % of TiO2.

Item Type: Thesis (Masters)
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD891-894 Noise and its control
Depositing User: Normajihan Abd. Rahman
Date Deposited: 25 May 2014 00:51
Last Modified: 25 May 2014 00:51
URI: http://eprints.uthm.edu.my/id/eprint/5485
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