Influence of UV irradiated on high doping TiO2 of polymer foam for acoustic study
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 experimenta...
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| Format: | Thesis |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/5485/ http://eprints.uthm.edu.my/5485/1/BAINUN_AKMAL_BINTI_MOHD_ATAN.pdf |
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| Summary: | 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. |
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