Sound Absorption of Microperforated Panel Made from Coconut Fiber and Polylactic Acid Composite

Sheng, Desmond Daniel Chin Vui; Yahya, Musli Nizam; Din, Nazli Bin Che

doi:10.1080/15440478.2020.1821290

Cited by 32 publications

(9 citation statements)

References 34 publications

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“…The large-scale preparation of PLA MNs with a width of 45 mm and a length of >1000 m is shown in Figure f. The prepared PLA melt-blowout nonwovens displayed exceptional natural antibacterial properties, ultrafine fiber, high porosity, etc., and had potential application prospects in the fields of antibacterial, , oil–water separations, − pollution removal, ,− sound absorption, , and thermal insulation (Figure g). , …”

Section: Resultsmentioning

confidence: 99%

A Fiber Sliding–Orientation Based Micromechanics Failure Model for Melt-Blown Nonwovens

Liu,

Wang

et al. 2023

Langmuir

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The mechanical model of melt-blown nonwovens (MNs) serves as the foundation for performance optimization, which can offer helpful guidance for product material selection, structural design, and cost control. However, it is challenging to describe the micromechanics failure mechanism of MNs using the traditional mechanical model, which aims to match the model curve with the experimental result at the macrolevel. Herein, a micromechanics failure model for MNs based on sliding–orientation competition is developed. Through in situ observations of fiber position changes and the fluctuation of stress–strain curves, fiber sliding and orientation are introduced into the failure process of MNs. Due to fiber bonding and static friction, only orientation happens during the first stage of stretching. In dramatic contrast, the fibers will slide and orient in the second stage of stretching to change their positions in response to the external force. Sliding friction, fiber bonding, and static friction make up the stress of MNs, and the conflict of fiber sliding and orientation causes variations in the stress. The model has been successfully applied to polylactic acid (PLA) MNs, which proves the effectiveness of the model in MNs.

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Section: Resultsmentioning

confidence: 99%

A Fiber Sliding–Orientation Based Micromechanics Failure Model for Melt-Blown Nonwovens

Liu,

Wang

et al. 2023

Langmuir

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“…In earlier days, a perforated panel was used for sound absorption purposes. Yet, the sound absorption properties of the perforation panel were insufficient, and therefore, the capacity of the perforated panel was downgraded to a trivial protective cover for a porous sound absorber, as the porous sound absorber greatly enhances its sound absorption performance [2,3]. The perforated panel has insufficient acoustic resistance, mostly due to the larger perforated hole area.…”

Section: Introductionmentioning

confidence: 99%

“…PLA is derived from natural resources such as starch or sugarcane [11]. PLA is also often used to produce biocomposite with natural fibers such as kenaf, coir, and wood [3,[12][13][14][15][16][17]. Hence, PLA can be considered a good alternative to replace polymers derived from petroleum resources.…”

Section: Introductionmentioning

confidence: 99%

Sound Absorption of Microperforated Panel Made from Polylactic Acid (PLA)

Daniel Chin Vui Sheng,

Nizam Bin Yahya,

Bin Che Din

et al. 2024

J. Phys.: Conf. Ser.

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The microperforated panel (MPP) is a unique panel that has evolved from the traditional perforated panel. Previously, the perforated panel was mainly used as a protective cover for porous materials. The MPP absorbs sound through the viscous effect around its perforated holes. However, traditional MPPs are typically made from metallic materials that are not environmentally friendly. In contrast, polylactic acid (PLA) is a biopolymer extracted from natural resources such as corn and sugarcane. When buried in soil, PLA degrades naturally with the assistance of soil bacteria and fungi, making it an eco-friendly choice. In this study, 3D printing method was utilized to produce MPP using PLA as the material. The sound absorption performance of PLA MPP was compared to steel MPP, which served as the benchmark. Interestingly, the sound absorption performance of PLA MPP was found to be comparable to that of steel MPP. This highlights PLA as a viable material for MPP production, aligning with the global goal of environmental preservation and Sustainable Development Goal (SDG) 12, which emphasizes responsible consumption and production.

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“…Typically, the MPP has been implemented using a single type, wherein its sound absorption mechanism with a rigid back wall is only primally effective at the middle frequencies, exhibiting resonance peak characteristics [7,8]. In order to achieve higher acoustic performance in terms of sound absorption coefficient and absorption frequency range, a double-leaf MPP with a rigid-back wall is developed.…”

Section: Introductionmentioning

confidence: 99%

The sound absorption properties of a double-leaf micro perforated panel (DL-MPP) made from a double-layered polypropylene material.

Yahya,

Che Din,

Desmond Daniel

et al. 2024

J. Phys.: Conf. Ser.

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Micro-perforated panel sound absorbers are recognized as an alternative method for noise control, offering advantages over conventional porous absorbers. However, the sound absorption of a single micro-perforated panel (MPP) is limited in its ability to cover a broad range of frequencies, especially in the low-frequency region. Therefore, the primary focus of this study is to investigate the sound absorption performance of a double-leaf micro-perforated panel (DL-MPP) absorber, which aims to achieve high sound absorption across a wide frequency range. This study examines the impact of varying parameters, including perforation ratio, diameter of perforated holes, and air gap thickness, on the sound absorption characteristics of a polypropylene-based DL-MPP absorber. Polypropylene was used as the sound absorption material for this investigation. The DL-MPP absorber consists of two perforated panels installed parallel to a rigid back wall, with an air gap between them. To assess the sound absorption performance, a prototype of the DL-MPP absorber was fabricated and tested using a two-microphone impedance tube method following ASTM E1050 standard. The results demonstrate that the optimal sound absorption performance was achieved by designing the MPPs with a 1% perforation ratio, 1 mm diameter of perforated holes, and a 1 mm sample thickness.

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Sound Absorption of Microperforated Panel Made from Coconut Fiber and Polylactic Acid Composite

Cited by 32 publications

References 34 publications

A Fiber Sliding–Orientation Based Micromechanics Failure Model for Melt-Blown Nonwovens

A Fiber Sliding–Orientation Based Micromechanics Failure Model for Melt-Blown Nonwovens

Sound Absorption of Microperforated Panel Made from Polylactic Acid (PLA)

The sound absorption properties of a double-leaf micro perforated panel (DL-MPP) made from a double-layered polypropylene material.

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