Kolya Haradhan, Kang Chun-Won
Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea..
Carbohydr Polym. 2022 Jan 15;276:118874. doi: 10.1016/j.carbpol.2021.118874. Epub 2021 Nov 8.
This research aimed to study the efficacy of oxidation in wood cell walls by ammonium persulfate solution and the performances in sound absorption coefficients and gas permeability for cross sectional Oak wood (Quercus mongolica) species. Reaction parameters were optimized and extensive instrumental characterization techniques were used to study cell wall modifications, such as X-ray photoelectron spectroscopy, X-ray diffraction, attenuated total reflectance Fourier transforms infrared spectroscopy, and scanning electron microscope. The oxidation treatment changed the chemical compositions of wood (hemicellulose, cellulose, and lignin), boosting wood porosity (12%) and gas permeability (39%). The effectiveness accelerates improvement of average sound absorption coefficient at each frequency range: 250-500 Hz (4.6%), 500-1000 Hz (26.8%), 1000-2000 Hz (31.8%), 2000-6400 Hz (57.8%) and overall 250-6400 Hz (47.1%) compared to the control samples. Simple wood oxidation treatment could be helpful for novel research and wood based sound absorption materials to manage the acoustic housing environment.
本研究旨在探讨过硫酸铵溶液对木材细胞壁的氧化作用，以及蒙古栎木材横截面在吸声系数和透气性能方面的表现。对反应参数进行了优化，并采用了广泛的仪器表征技术来研究细胞壁的改性，如X射线光电子能谱、X射线衍射、衰减全反射傅里叶变换红外光谱和扫描电子显微镜。氧化处理改变了木材的化学成分（半纤维素、纤维素和木质素），提高了木材的孔隙率（12%）和透气性（39%）。与对照样品相比，这种有效性加速了每个频率范围内平均吸声系数的提高：250 - 500Hz（4.6%）、500 - 1000Hz（26.8%）、1000 - 2000Hz（31.8%）、2000 - 6400Hz（57.8%）以及总体250 - 6400Hz（47.1%）。简单的木材氧化处理可能有助于新型研究和木质吸声材料改善声学居住环境。
