Acoustic properties of biodegradable composite micro-perforated panel (BC-MPP) made from kenaf fibre and polylactic acid (PLA)

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

doi:10.1016/j.apacoust.2018.04.009

Cited by 52 publications

(22 citation statements)

References 34 publications

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“…Furthermore, various natural materials have been studied in the last decade [6,7]. Many results for sound-absorbing materials made of natural materials from natural fibers, for example, coir [8], kenaf [9,10], bamboo [11], wool, etc. have been published [12].…”

Section: Introductionmentioning

confidence: 99%

A Pilot Study on the Sound Absorption Characteristics of Chicken Feathers as an Alternative Sustainable Acoustical Material

et al. 2019

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This communication reports the results of a pilot study on the sound absorption characteristics of chicken feathers (CFs). Recently, demands for natural and sustainable materials have been extensively studied for acoustical purposes. CF has long been left wasted, however, they can be used for sound-absorbing purposes to improve acoustical environments as a sustainable and green acoustical material. In order to clarify their feasibility, samples of CF absorbers of various densities and thicknesses were prepared, and their sound absorption coefficients were measured by the standard impedance tube method. The measured results were also compared with those of conventional glass wools of the same densities and thicknesses. The results show that CFs have potentially good sound-absorption performance, which is similar to typical fibrous materials: increasing with frequency. Results of direct comparison with glass wool demonstrate that the absorption coefficients of CFs are comparable and, at some frequencies, somewhat higher than conventional glass wools in some cases. Additionally, the first step for searching a prediction method for the sound absorption performance of CFs, their flow resistivity was measured and a Delany–Bazley–Miki model was examined. However, the resultant flow resistivity was unexpectedly low, and the model gave only a much lower value than that measured. The reason for the discrepancies is the subject of a future study.

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Section: Introductionmentioning

confidence: 99%

A Pilot Study on the Sound Absorption Characteristics of Chicken Feathers as an Alternative Sustainable Acoustical Material

et al. 2019

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“…Usually, conventional perforated panels will be having holes with a larger diameter which could not provide satisfactory acoustic absorption. is problem leads to the discovery of microperforated panels which has a smaller diameter of pores in it [14]. In an acoustic panel made of natural fibers, its acoustic absorption is influenced by some of the factors like the fiber morphology, content of fiber, position of perforated plates, treatment of fiber, and so forth.…”

Section: Acoustic Panels Made Of Natural Fibers and Their Evolutionmentioning

confidence: 99%

“…To know about the effect of fiber content on the acoustic absorption coefficient, Daniel et al mixed the kenaf fibers in different ratios with PLA and hot pressed into a microperforated plate. ey found that the composite with 30% of percentage of kenaf fibers has shown the maximum absorption coefficient [14]. Ismail et al bonded the rice husk and sugarcane bagasse at different fiber contents using phenol formaldehyde resin which is later hot pressed into an acoustic panel.…”

Section: Acoustic Panels Made Of Natural Fibers and Their Evolutionmentioning

confidence: 99%

“…Prominent enhancement in the mechanical properties has been reported when reinforcements are done. Daniel et al reinforced the kenaf fiber with PLA as a matrix and concluded that 30% fiber content shows the maximum sound absorption coefficient of 0.987 at a frequency of 1521 Hz and increase in mechanical properties as well [14]. All the available natural fibers reinforced with some of the polymer matrix and their resulting enhanced mechanical and acoustical properties are tabulated in Tables 12 and 13.…”

Section: Natural Fibers As Reinforcementmentioning

confidence: 99%

“…Haramen et al melt-blended PLA as a polymer matrix with oil palm empty fruit bunch fiber using Brabender internal mixer, and the composite shows promising mechanical properties by adding plasticizer [141]. Daniel et al melt-blended PLA as a polymer matrix with kenaf fibers using Brabender internal mixer, and the composite with different compositions is tested for both mechanical and acoustical properties [14]. e temperature for the process can be maintained between 180°C and 190°C considering the melting temperature of pure PLA [138].…”

Section: Techniques For Compounding Polymer Matrix With Reinforcementmentioning

confidence: 99%

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Additive Manufacturing: A Novel Method for Developing an Acoustic Panel Made of Natural Fiber-Reinforced Composites with Enhanced Mechanical and Acoustical Properties

Sekar

Fouladi

Namasivayam

et al. 2019

Journal of Engineering

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Natural fibers and their composites are being widely used in almost all the applications in this modern era. However, the properties of natural fibers have to be enhanced in order to compete with synthetic fibers. This review paper opens up additive manufacturing, as a novel method for developing an acoustic panel using natural fiber composites with enhanced mechanical and acoustical properties. This approach will help to replace synthetic-based acoustic absorbers with biodegradable composite panels in acoustic applications. This review also covers, poly(lactic acid) as a polymer matrix and its advantages, the available variety of natural fibers as reinforcement in terms of mechanical and acoustical properties. The natural fiber-based filaments used in additive manufacturing and acoustic panels made from the available natural fibers are also elaborated here. This review shows the importance of additive manufacturing and its application to develop novel acoustic panels made of agricultural waste.

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Optimization of Fiber Content and Alkali Treatment on Sound Damping Performances of Kenaf Core/Unsaturated Polyester Composites

Vicarneltor¹,

Ujianto²,

Setijotomo³

et al. 2020

Macromolecular Symposia

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Kenaf core/unsaturated polyester (KC/UP) composites are prepared by mechanical stirrer followed by compression molding. Effect of fiber percentage as well as alkali treatment (NaOH concentration and immersion time) on sound damping performance are analyzed and optimized using three factors and three levels of Box–Behnken experimental design. Flexural properties, heat deflection temperature (HDT), density, lignin content, and morphology are investigated on selected samples. The results show that the optimum condition to produce KC/UP composites is predicted at 54.5% of fiber, 8.1% of NaOH used on alkali treatment, and 2 h fiber immersion on NaOH, giving 5.6% of sound damping/mm. Verifying the model results in 5.1% of sound damping/mm. Despite lower value of verification sample than predicted, this is still between 95% of predicting interval (4.1–7.1%), which is still higher than control sample (3.8%), suggesting model capability to predict the result. Further analysis on selected samples with the highest, mid and lowest sound damping property results in the change of flexural modulus at 38%, −9%, and 28%, respectively, and improvement in HDT (23%, 12%, and 22%). However, the flexural strengths of all selected samples are lower than that of control (−37%, −67%, and −44%). Morphology analysis shows that sample with 45% fiber content is more compact than 30% fiber content, which improves sound damping.

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Acoustic properties of biodegradable composite micro-perforated panel (BC-MPP) made from kenaf fibre and polylactic acid (PLA)

Cited by 52 publications

References 34 publications

A Pilot Study on the Sound Absorption Characteristics of Chicken Feathers as an Alternative Sustainable Acoustical Material

A Pilot Study on the Sound Absorption Characteristics of Chicken Feathers as an Alternative Sustainable Acoustical Material

Additive Manufacturing: A Novel Method for Developing an Acoustic Panel Made of Natural Fiber-Reinforced Composites with Enhanced Mechanical and Acoustical Properties

Optimization of Fiber Content and Alkali Treatment on Sound Damping Performances of Kenaf Core/Unsaturated Polyester Composites

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