Investigating Sound Absorption of Oil Palm Trunk Panels Using One-microphone Impedance Tube

Kerdtongmee, Pansak; Saleh, Asleena; Eadkhong, Thammarong; Danworaphong, Sorasak

doi:10.15376/biores.11.4.8409-8418

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…Ciri demikian berpotensi sebagai bahan penyerap suara berpori atau sebagai resonator Helmholtz. Namun untuk meningkatkan kinerjanya perlu memodifikasinya terlebih dahulu [10][11][12].…”

Section: Latar Belakangunclassified

“…Komposit berpenguat serat sintetis disubtitusi serat batang kelapa sawit telah diselidiki sifat akustiknya dan mendapatkan koefisien penyerapan () hingga 0,99 [12] dan juga komposit dengan serat BKS dan Matrik UF diperoleh  sebesar 0,8 berdasarkan variasi ketebalan [11]. Papan kayu BKS berbentuk panel-panel bulat dan tipis, dimana salah satu sisi permukaannya diberi lubang-lubang (lubang resonator) telah mendapatkan koefisien penyerapan yang beragam, sesuai dengan variasi kedalaman lubang resonator [10]. Serta kayu BKS diberi perlakuan modifikasi variasi pH formalisasi dan dilanjutkan dengan impregnasi resin MF kedalam rongga/pori kayu telah mendapatkan aplikasi akustik kayu BKS yang baru, yaitu sebagai penyerap resonansi.…”

Section: Latar Belakangunclassified

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Perluasan Kinerja Akustik Limbah Kayu Batang Kelapa Sawit Termodifikasi Bahan Formaldehida

Manik

Shaliha²,

Siregar³

et al. 2022

Positron

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Chemical modifications for waste oil palm trunks had carried out as acoustic material. This modification was conducted in two stages. Firstly, formalization with formaldehyde solution and secondly is impregnation with melamine-formaldehyde resin. Formalization was conducted in alkaline condition (pH 10) for 3 days and 5 days. Impregnation was carried out under pressure 3 bar and 5 bar and held for an hour. For completed these modification, the samples was cured at 120oC for 10 minutes and then dried at (103±2)oC to reached moisture content of less than 6%. This modification has changed the chemical structure and the morphology of wood, as shown by the FTIR and SEM results. The samples became denser, stronger and more rigid. Furthermore, the mechanical and physical properties of modified wood are also increasing. The absorption coefficient decreases with increasing formalization time and impregnation pressure. Based on trend of absorption coefficient, BKS wood can be applicated as resonant absorber with work class from A to class B and D.

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“…Ciri demikian berpotensi sebagai bahan penyerap suara berpori atau sebagai resonator Helmholtz. Namun untuk meningkatkan kinerjanya perlu memodifikasinya terlebih dahulu [10][11][12].…”

Section: Latar Belakangunclassified

Perluasan Kinerja Akustik Limbah Kayu Batang Kelapa Sawit Termodifikasi Bahan Formaldehida

Manik

Shaliha²,

Siregar³

et al. 2022

Positron

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“…Numerous studies have focused on manufacturing particleboards from various types of palm tree waste [9][10][11][12][13][14][15][16][17][18]. Additionally, palm tree pruning waste has been investigated for its use as a reinforcement [19][20][21] and in the manufacture of various compounds [22,23].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Properties and Reaction-to-Fire Performance of Binderless Particleboards Made from Canary Island Palm Trunks

Ferrandez-Garcia,

Garcia-Ortuño,

Ferrandez-Villena

et al. 2024

Fire

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Repurposing agricultural and forestry by-products not only is beneficial for the environment but also follows the principles of the circular economy. In southeastern Spain, the Canary Island palm tree (Phoenix canariensis W.) is widely used in urban landscapes. Plantations affected by the red weevil, a pest, generate an abundance of plant waste that must be crushed and transferred to authorized landfills. The aim of this study was to manufacture boards using particles from trunks of the Canary Island palm tree without adding any binders in order to obtain an ecological and fire-resistant product. In order to manufacture the boards, three particle sizes (<0.25, 0.25–1, and 1–2 mm), a temperature of 110 °C, a pressure of 2.6 MPa, and a pressing time of 7 min were used. The boards were pressed in a hot plate press for 7 min up to four times (7 min, 7 + 7 min, 7 + 7 + 7 min, and 7 + 7 + 7 + 7 min). The resulting boards showed good thermal performance, and the board´s reaction-to-fire performance was classified as Bd0 (an Fs value of 70.3 mm). This study also showed that boards with a particle size smaller than 0.25 mm that underwent four pressing cycles of 7 min each in the press can be categorized as grade P2 according to the European Standards (MOR of 20 N/mm2, MOE of 2589.8 N/mm2, and IB of 0.74 N/mm2). Therefore, these manufactured particleboards could be used as a flame-retardant material for the interior enclosures of buildings (vertical and horizontal) without the need for coatings.

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“…Backer) [4], jute (Corchorus L.) with latex [5], oil palm (Elaeis guineensis Jacq.) residues [6], date palm (Phoenix dactylifera L.) fibers [7], canary palm (Phoenix canariensis hort. Ex Chabaud) residues [8], and giant reed (Arundo donax L.) [9].…”

Section: Introductionmentioning

confidence: 99%

Acoustic and Thermal Properties of Particleboards Made from Mulberry Wood (Morus alba L.) Pruning Residues

et al. 2022

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The aim of this study was to determine the acoustic and thermal properties of particleboards made from mulberry wood pruning waste using urea formaldehyde resin (UF) as a binder. The investigation focused on the evaluation of the thermal conductivity and the acoustic absorption of the boards and the assessment of their feasibility for use in the construction sector. The mean thermal conductivity values of the particleboards (0.065–0.068 W/mK) were lower than those obtained in wood and similar to those in cork panels. The samples were tested with frequencies from 50 to 6300 Hz. In all cases, the results allowed us to conclude that they were better sound absorbers than commercial wood and plywood panels of the same average density for low frequencies, and with similar values for medium and high frequencies. The mechanical results reached the minimum requirement to be considered as boards for general use and, specifically with particles from 0.25 to 1.00 mm, for furniture according to European standards. The particle size of the particleboards was the variable that influenced all the acoustic properties, but did not affect the thermal conductivity. The experimental results indicated that the thermal and acoustic properties of these particleboards were promising for their application in commercial uses.

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Investigating Sound Absorption of Oil Palm Trunk Panels Using One-microphone Impedance Tube

Cited by 8 publications

References 14 publications

Perluasan Kinerja Akustik Limbah Kayu Batang Kelapa Sawit Termodifikasi Bahan Formaldehida

Perluasan Kinerja Akustik Limbah Kayu Batang Kelapa Sawit Termodifikasi Bahan Formaldehida

Evaluation of the Properties and Reaction-to-Fire Performance of Binderless Particleboards Made from Canary Island Palm Trunks

Acoustic and Thermal Properties of Particleboards Made from Mulberry Wood (Morus alba L.) Pruning Residues

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