Sains Malaysiana 44(12)(2015): 1757–1763
Rigid/Flexible Polyurethane Foam Composite Boards with
Addition
of Functional Fillers: Acoustics Evaluations
(Buih
Poliuretana Tegar/Fleksibel Papan Komposit dengan Penambahan Fungsian Pengisi:
Penilaian Akustik)
C.H. HUANG1, C.W.
LOU2, Y.C.
CHUANG3, C.F.
LIU4, Z.C.
YU5,6 & J.H.
LIN*3,7,8
1Department of Aerospace and Systems Engineering, Feng Chia
University, Taichung City 407,
Taiwan
2Institute of Biomedical
Engineering and Materials Science, Central Taiwan University of Science and
Technology, Taichung 40601, Taiwan
3Laboratory of Fiber
Application and Manufacturing, Department of Fiber and Composite Materials
Feng Chia University, Taichung
40402, Taiwan
4Office of Physical Education
and Sports Affairs, Feng Chia University, Taichung 40402, Taiwan
5Functional Textile
Materials Laboratory, School of Chemical Engineering and Material Science
Eastern Liaoning
University, 118003 Dandong, China
6School of Textiles,
Tianjin Polytechnic University, 300387 Tianjin, China
7School of Chinese
Medicine, China Medical University, Taichung 40402, Taiwan
8Department of Fashion
Design, Asia University, Taichung 41354, Taiwan
Diserahkan: 14 Jun 2015/Diterima:
17 Ogos 2015
ABSTRACT
Following rapid technological and
industrial development, factories have been equipped with a great deal of
machines. The blend of industrial and residential areas in turn resulted in
many environmental problems. In particular, machine operation causes noise
pollution that easily causes physiological and psychological discomfort for the
human body thus makes noise abatement a crucial and urgent issue. In this
study, vermiculite functional fillers were added to polyurethane (PU)
foam mixtures in order to form sound absorbent PU foams.
The correlations between the contents of functional fillers and the sound
absorption of flexible and rigid PU foams were then examined.
The optimal PU foams were combined with PET/carbon
fiber matrices in order to yield the electromagnetic shielding effectiveness.
The sound absorption, noise reduction coefficient (NRC),
electromagnetic shielding effectiveness and resilience rate of the composite
boards were finally evaluated. The test results indicated that rigid PU foam
composites can reach a sound absorption coefficient of 0.8 while the flexible PU foam
composites have higher mechanical properties.
Keywords: Functional fillers; noise
reduction coefficient; polyurethane (PU) foam; sound absorption
coefficient
ABSTRAK
Berikutan perkembangan teknologi dan
perindustrian yang pesat, kilang telah dilengkapi dengan mesin yang
banyak. Gabungan kawasan perindustrian dan perumahan telah menyebabkan
pelbagai masalah alam sekitar. Secara khususnya, operasi mesin menghasilkan
bunyi bising dan menyebabkan rasa tidak selesa daripada segi fisiologi
dan psikologi untuk tubuh manusia dan ini menjadikan pengurangan
bunyi bising suatu isu yang sangat penting dan mendesak. Dalam kajian
ini, vermikulit pengisi berfungsi ditambah kepada campuran buih
poliuretana (PU) untuk menghasilkan buih penyerap
bunyi PU. Korelasi antara kandungan pengisi
berfungsi dan penyerapan bunyi buih fleksibel dan tegar PU kemudian
dikaji. Buih PU yang optimum digabungkan dengan PET atau
matriks genting karbon untuk menghasilkan keberkesanan perisai
elektromagnet. Penyerapan bunyi, pekali pengurangan bunyi (NRC),
keberkesanan perisai elektromagnetik serta kadar ketahanan papan
komposit akhirnya dinilai. Keputusan ujian menunjukkan bahawa komposit
buih PU
tegar boleh mencapai pekali bunyi penyerapan 0.8 sementara
komposit buih PU
fleksibel mempunyai sifat mekanik yang lebih tinggi.
Kata kunci: Pekali mengurangkan hingar; pekali penyerapan bunyi;
pengisi berfungsi; poliuretana (PU) buih
RUJUKAN
Beranek,
L.L. 1988. Noise and Vibration Control. New York: McGraw Hill. p. 672.
Demharter,
A. 1998. Polyurethane rigid foam, a proven thermal insulating material for
applications between +130°C and -196°C. Cryogenics 38: 113-117.
Huang, C.H.,
Lin, J.H. & Chuang, Y.C. 2014. Manufacturing process and property
evaluation of sound-absorbing and thermal-insulating polyester
fiber/polypropylene/thermoplastic polyurethane composite board. J. Ind. Text. 43: 627-640.
Huang, C.H.
& Chuang, Y.C. 2013. The design and optimization of nonwoven composite
boards on sound absorption performance. Applied Mechanics and Materials 365-366:
1217-1220.
Hung, T.C.,
Huang, J.S., Wang, Y.W. & Lin, K.Y. 2014. Inorganic polymeric foam as a
sound absorbing and insulating material. Constr. Build Mater. 50:
328-334.
Lin, J.H., Li,
T.T. & Lou, C.W. 2014a. Puncture-resisting, sound-absorbing and
thermal-insulating properties of polypropylene-selvages reinforced composite
nonwovens. J. Ind. Text. doi: 10.1177/1528083714562088.
Lin, J.H., Li,
T.T., Hsu, Y.H. & Lou, C.W. 2014b. Preparation and property evaluation of
sound-absorbing/thermal-insulating PU composite boards with cushion protection. Fiber Polym. 15(7): 1478-1483.
Li, T.T.,
Chuang, Y.C., Huang, C.H., Lou, C.W. & Lin, J.H. 2015. Applying vermiculite
and perlite fillers to sound-absorbing/ thermal-insulating resilient PU foam
composites. Fiber Polym. 16(3): 691-698.
Tai, K.C., Chen,
P., Lin, C.W., Lou, C.W., Tan, H.M. & Lin, J.H. 2010. Evaluation on the
sound absorption and mechanical property of the multi-layer needle-punching
nonwoven. Advanced Materials Research 123-125: 475-478.
Yan, R.S., Wang,
R., Lou, C.W. & Lin, J.H. 2014. Manufacturing technique and acoustic
evaluation of sandwich laminates reinforced high-resilience inter/intra-ply
hybrid composites. Fiber Polym. 15(10): 2201-2210.
Zhang, C.H., Li,
J.Q., Hu, Z., Zhu, F.L. & Huang, Y.D. 2012. Correlation between the
acoustic and porous cell morphology of polyurethane foam: Effect of
interconnected porosity. Mater. Design 41: 319-325.
Zoran, S.P.,
Ivan, J. & Vladimir, D. 1998. Structure and physical properties of
segmented polyurethane elastomers containing chemical crosslinks in the hard
segment. Journal of Polymer Science Part B: Polymer Physics 36(2):
221-235.
*Pengarang untuk surat-menyurat; email: jhlin@fcu.edu.tw
|