Department of Housing Environmental Design and Research Institute of Human Ecology, College of Human Ecology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
Department of Housing Environmental Design and Research Institute of Human Ecology, College of Human Ecology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
Int J Biol Macromol. 2024 Sep;276(Pt 2):134083. doi: 10.1016/j.ijbiomac.2024.134083. Epub 2024 Jul 31.
Coconut wood (Cocos nucifera L.) is lightweight and has variable quality, making it a potential candidate for manufacturing sound absorption boards. However, its sound absorption coefficient needs enhancement to optimize its effectiveness in this application. This study aims to enhance its sound absorption properties using eco-friendly hydrogen peroxide and acetic acid treatments. This treatment modified the carbohydrate polymers (hemicellulose and cellulose) and lignin structures in the wood cell wall. The novelty of this approach lies in using these chemicals to improve acoustic performance significantly. Coconut wood samples were treated with a 1:1 acetic acid and hydrogen peroxide mixture for 20, 40, 60, and 80 min. Characterization techniques such as FTIR, XPS, and XRD, and 3D optical profilometry analyzed changes in chemical functionalities, crystallinity, and surface roughness. Sound absorption coefficients were measured using the impedance tube method. Results showed a significant improvement in sound absorption for all treated samples, especially at 60 min. The treatment also enhanced surface roughness, air permeability, porosity, and pore sizes, contributing to better sound absorption. This proposed treatment method addresses environmental consciousness and enhances the sustainable use and utilization of coconut wood.
椰木（Cocos nucifera L.）重量轻，质量多变，是制造吸声板的潜在候选材料。然而，为了优化其在该应用中的效果，需要提高其吸声系数。本研究旨在使用环保的过氧化氢和乙酸处理来增强其吸声性能。该处理改变了细胞壁中碳水化合物聚合物（半纤维素和纤维素）和木质素的结构。这种方法的新颖之处在于使用这些化学品显著提高了声学性能。椰木样品用 1:1 的乙酸和过氧化氢混合物处理 20、40、60 和 80 分钟。傅里叶变换红外光谱（FTIR）、X 射线光电子能谱（XPS）和 X 射线衍射（XRD）以及 3D 光学轮廓仪等表征技术分析了化学官能团、结晶度和表面粗糙度的变化。使用阻抗管法测量吸声系数。结果表明，所有处理过的样品的吸声性能都有显著提高，尤其是在 60 分钟时。该处理还提高了表面粗糙度、透气性、孔隙率和孔径，有助于更好的吸声。这种处理方法符合环保意识，提高了椰木的可持续使用和利用。
