Sound Absorption of Natural Fiber Composite from Sugarcane Bagasse and Coffee Silver Skin

Q2 Engineering

Journal of the Korean wood science and technology Pub Date : 2023-11-01 DOI:10.5658/wood.2023.51.6.470

W. Kalasee, Putipong Lakachaiworakun, Visit Eakvanich, P. Dangwilailux

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引用次数: 0

Abstract

This study aimed to develop a sound-absorbing composite using sugarcane bagasse (SB) and coffee silver skin (CS) as raw materials. The composite boards were manufactured by bonding the fibers with Melamine Urea-Formaldehyde adhesive, ensuring a consistent thickness of 30 mm. Various densities were employed, namely 380, 450, and 520 kg/m 3 . The samples were fabricated with different fiber ratios, including SB100%, SB75% with CS25%, and SB50% with CS50%. The sound absorption coefficient (SAC) and noise reduction coefficient (NRC) were measured using the impedance tube method within a frequency range of 63–6,300 Hz. The experimental results revealed that the mixing ratio of CS exerted a notable influence on enhancing the SAC, while the density of the composite board exhibited a significant impact on increasing both the SAC and NRC. Among the densities tested, the optimal value was observed at 520 kg/m 3 , yielding a SAC value of 0.65 at a frequency of 1,000 Hz and an NRC value of 0.55 for the SB50-CS50 composite plate. These findings underscore the importance of considering the CS mixing ratio and composite board density when aiming to optimize sound absorption properties.

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甘蔗渣和咖啡银皮天然纤维复合材料的吸音性能

本研究旨在开发一种以甘蔗渣（SB）和咖啡银皮（CS）为原料的吸音复合材料。复合板是用三聚氰胺脲醛粘合剂粘合纤维制成的，确保厚度一致为 30 毫米。采用了不同的密度，即 380、450 和 520 公斤/米 3。样品采用了不同的纤维比例，包括 SB100%、SB75%（含 CS25%）和 SB50%（含 CS50%）。在 63-6,300 Hz 的频率范围内，使用阻抗管法测量了吸音系数（SAC）和降噪系数（NRC）。实验结果表明，CS 的混合比对提高 SAC 有显著影响，而复合板的密度对提高 SAC 和 NRC 都有显著影响。在测试的密度中，最佳值为 520 kg/m 3，在频率为 1,000 Hz 时，SB50-CS50 复合板的 SAC 值为 0.65，NRC 值为 0.55。这些发现强调了在优化吸音特性时考虑 CS 混合比和复合板密度的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Korean wood science and technology Materials Science-Materials Science (miscellaneous)

CiteScore

5.20

自引率

0.00%

发文量

期刊介绍： The Journal of the Korean Wood Science and Technology (JKWST) launched in 1973 as an official publication of the Korean Society of Wood Science and Technology has been served as a core of knowledges on wood science and technology. The Journal acts as a medium for the exchange of research in the area of science and technology related to wood, and publishes results on the biology, chemistry, physics and technology of wood and wood-based products. Research results about applied sciences of wood-based materials are also welcome. The Journal is published bimonthly, and printing six issues per year. Supplemental or special issues are published occasionally. The abbreviated and official title of the journal is ''J. Korean Wood Sci. Technol.''. All submitted manuscripts written in Korean or English are peer-reviewed by more than two reviewers. The title, abstract, acknowledgement, references, and captions of figures and tables should be provided in English for all submitted manuscripts.