Sains Malaysiana 52(7)(2023): 2103-2114

http://doi.org/10.17576/jsm-2023-5207-16

 

Sound-Absorbing Material Based Oil Palm Frond Natural Fibres

(Serat Asli Pelepah Kelapa Sawit Berasaskan Bahan Penyerap Bunyi)

 

LAY SHENG EWE1,*, WENG KEAN YEW2, HAI SONG WOON1 & ZAWAWI IBRAHIM3

 

1College of Engineering, Universiti Tenaga Nasional (UNITEN), Putrajaya Campus, Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia

2School of Engineering and Physical Sciences, Heriot-Watt University Malaysia, No 1, Jalan Venna P5/2, Precint 5, 62200 Putrajaya, Malaysia

3Engineering and Processing Division, Malaysian Palm Oil Board (MPOB), No. 6, Persiaran Institusi, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia

 

Diserahkan: 4 Mac 2023/Diterima: 28 Jun 2023

 

Abstract

Effective noise control is vital for improving living standards, but traditional sound absorbers pose health risks. Natural fibers offer a sustainable alternative, with consistent absorption rates across a broad frequency range. These fibers, widely available in Malaysia, are non-toxic, lightweight, renewable, and eco-friendly, making them an attractive option. The safety benefits of natural fibers further enhance their appeal as sound absorbers, making them an excellent choice for those concerned about environmental impact and personal health. This study will examine the effect of different thicknesses on the acoustic performance of natural fibers from oil palm fronds (OPF). The findings demonstrate that, when material density is 160 kg/m3, all thicknesses can achieve a good Sound Absorption Coefficient (SAC) of 0.8 or greater within 3600 - 6400 Hz range. However, at 180 kg/m3 density, only the 10 mm thickness sample has SAC of 0.8 or greater, but for 2800 - 6400 Hz range. It is worth noting that, across 0 - 6400 Hz, 10 mm thick and 180 kg/m3 density sample has higher SAC than 160 kg/m3 samples. Nevertheless, for 12 mm, 14 mm, and 16 mm thicknesses, SAC of 160 kg/m3 is higher than 180 kg/m3 after an interception point. Before that interception point, SAC of 160 kg/m3 is lower than 180 kg/m3. As thickness increases from 12 mm to 16 mm, the interception point decreases from 2100 Hz to 1600 Hz. The research demonstrates that various factors, such as frequency, density, thickness, and fiber structure, impact the acoustic performance of OPF LDF.

 

Keywords: Density; oil palm frond (OPF); sound absorption coefficient (SAC); thickness

 

Abstrak

Kawalan bunyi yang berkesan adalah penting untuk meningkatkan tahap kehidupan, tetapi penyerap bunyi tradisional mempunyai risiko kesihatan. Serat semula jadi menawarkan alternatif yang mampan dengan kadar penyerapan yang tekal merentasi pelbagai julat frekuensi. Serat ini, yang melimpah di Malaysia, tidak toksik, ringan, boleh diperbaharui dan mesra alam, menjadikannya pilihan yang menarik. Manfaat keselamatan serat semula jadi lebih menambah daya tarikan mereka sebagai penyerap bunyi, menjadikannya pilihan yang sangat baik bagi mereka yang prihatin tentang impak alam sekitar dan kesihatan diri. Penyelidikan ini mengkaji kesan ketebalan yang berbeza pada prestasi akustik serat semula jadi daripada pelepah kelapa sawit (OPF). Hasil kajian menunjukkan bahawa, apabila ketumpatan bahan adalah 160 kg/m3, semua ketebalan dapat mencapai Koefisien Penyerapan Bunyi (SAC) yang baik iaitu 0.8 atau lebih dalam julat frekuensi 3600 - 6400 Hz. Walau bagaimanapun, pada ketumpatan 180 kg/m3, hanya sampel ketebalan 10 mm yang mempunyai SAC 0.8 atau lebih, tetapi untuk julat frekuensi 2800 - 6400 Hz. Perlu dicatat bahawa, merentasi julat 0 - 6400 Hz, sampel ketebalan 10 mm dan ketumpatan 180 kg/m3 mempunyai nilai SAC yang lebih tinggi daripada sampel 160 kg/m3. Namun begitu, untuk ketebalan 12 mm, 14 mm dan 16 mm, nilai SAC 160 kg/m3 lebih tinggi daripada 180 kg/m3 selepas titik intersepsi. Sebelum titik intersepsi itu, nilai SAC 160 kg/m3 lebih rendah daripada 180 kg/m3. Apabila ketebalan meningkat daripada 12 mm ke 16 mm, titik intersepsi berkurangan daripada 2100 Hz kepada 1600 Hz. Kajian ini menunjukkan bahawa pelbagai faktor, seperti frekuensi, ketumpatan, ketebalan dan struktur serat, mempengaruhi prestasi akustik OPF LDF.

 

Kata kunci: Ketebalan; ketumpatan; koefisien penyerapan bunyi (SAC); pelepah kelapa sawit (OPF)

 

RUJUKAN

Abdul, H.P.S., Jawaid, M., Hassan, A., Paridah, M.T. & Zaido, A. 2012. Oil palm biomass fibres and recent advancement in oil palm biomass fibres based hybrid biocomposites. Composites and Their Applications. InTech. https://doi.org/10.5772/48235

Acoustic Comfort. n.d. Sound Absorption Classes. Accessed on March 4, 2023. https://acousticcomfort.co.uk/uploads/Sound%20absorption%20classes.pdf

Ghulam Kadir, Ahmad Parveez, Nur Nadia Kamil, Norliyana Zin Zawawi & Meilina Ong-Abdullah. 2022. Oil palm economic performance in Malaysia and R&D progress in 2021. Journal of Oil Palm Research 34(2): 185-218. https://doi.org/10.21894/jopr.2022.0036

Gómez Escobar, V., Moreno González, C. & Rey Gozalo, G. 2021. Analysis of the influence of thickness and density on acoustic absorption of materials made from used cigarette butts. Materials 14(16): 4524. https://doi.org/10.3390/ma14164524

Hoda Soliman Seddeq. 2009. Factors influencing acoustic performance of sound absorptive materials. Australian Journal of Basic and Applied Sciences 3(4): 4610-4617.

Hua, Q. & Yang, E. 2018. Effect of thickness, density and cavity depth on the sound absorption properties of wool boards. Autex Research Journal 18(2): 203-208. https://doi.org/10.1515/aut-2017-0020

Istana, Budi, I Made Londen Batan, Sutikno, Samrith Khem, U Ubaidillah & Iwan Yahya. 2023. Influence of particle size and bulk density on sound absorption performance of oil palm frond-reinforced composites particleboard. Polymers 15(3): 510. https://doi.org/10.3390/polym15030510

Li, Y. & Ren, S. 2011. 2 - Basic properties of building decorative materials. In Building Decorative Materials. Woodhead Publishing: Woodhead Publishing Series in Civil and Structural Engineering. pp. 10-24. https://doi.org/https://doi.org/10.1533/9780857092588.10

Loh, S.K. 2017. The potential of the Malaysian oil palm biomass as a renewable energy source. Energy Conversion and Management 141(June): 285-298. https://doi.org/10.1016/j.enconman.2016.08.081

Mageswaran, R., Ewe, L.S., Yew, W.K., Mohammad Nazhan Nasir & Zawawi Ibrahim. 2021. Acoustic performance mixture of natural fibres of oil palm frond (OPF) and empty fruit bunch (EFB). Solid State Phenomena 317(May): 361-368. https://doi.org/10.4028/www.scientific.net/SSP.317.361

Mageswaran, R., Ewe, L.S., Yew, W.K. & Zawawi Ibrahim. 2019. Acoustic properties of mixing empty fruit bunch and oil palm frond natural fibres. International Journal of Recent Technology and Engineering (IJRTE) 8(4): 6347-6349. https://doi.org/10.35940/ijrte.D5119.118419

Nair, S.N. & Dasari, A. 2022. Development and characterization of natural-fiber-based composite panels. Polymers 14(10): 2079. https://doi.org/10.3390/polym14102079

Nandanwar, A., Kiran, M.C. & Varadarajulu, K. Ch. 2017. Influence of Density on sound absorption coefficient of fibre board. Open Journal of Acoustics 7: 1-9. https://doi.org/10.4236/oja.2017.71001

Nasir, Mohammad Nazhan, Ewe, L.S., Yew, W.K., Woon, H.S. & Zawawi Ibrahim. 2021. Enhancement of acoustic performance of oil palm frond natural fibers by substitution of jute fiber. Journal of Advanced Research in Materials Science 78(1): 11-17. https://doi.org/10.37934/arms.78.1.1117

Ong, T.K., Choo, H.L., Lee, S.M. & Kong, K.Y. 2020. Oil palm wastes as sustainable sound absorbing particleboard. IOP Conference Series: Materials Science and Engineering 815(1): 012010. https://doi.org/10.1088/1757-899X/815/1/012010

Qaim, M., Sibhatu, K.T., Siregar, H. & Grass, I. 2020. Environmental, economic, and social consequences of the oil palm boom. Annual Review of Resource Economics 12(1): 321-344. https://doi.org/10.1146/annurev-resource-110119-024922

Shen, J., Li, X. & Yan, X. 2021. Mechanical and acoustic properties of jute fiber-reinforced polypropylene composites. ACS Omega 6(46): 31154-31160. https://doi.org/10.1021/acsomega.1c04605

Sihabut, T. & Laemsak, N. 2010. Sound absorption capacity of oil palm frond fiberboard with different finishing. Environment and Natural Resources Journal 8: 38-43.

 

*Pengarang untuk surat-menyurat; email: laysheng@uniten.edu.my

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   

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