Wang Huixiang, Liu Rong, An Rui, Liu Xinyu, Zhao Shiyu, Zhu Zhaolong
Department of Biological Sciences, Xinzhou Normal University, Xinzhou 034000, China.
College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China.
Materials (Basel). 2025 May 29;18(11):2551. doi: 10.3390/ma18112551.
Bamboo, a renewable resource, has broad applications in construction, furniture, and other sectors. However, its dimensional stability and mechanical properties under varying humidity conditions pose challenges. This study aims to investigate the effects of microwave-compression treatment on the mechanical properties, water resistance, and chemical composition of bamboo at various moisture contents, and to elucidate the mechanisms underlying these changes. In the experiment, bamboo samples with moisture contents of 10%, 30%, and 50% were subjected to microwave-compression, and their mechanical properties, water resistance, chemical composition, and microstructure were subsequently analyzed. The results indicate that bamboo with low moisture content (10%) exhibited the best modulus of elasticity (MOE) and modulus of rupture (MOR), while bamboo with higher moisture contents (30% and 50%) showed significant declines in mechanical properties, although dimensional stability improved. Chemical analysis revealed that microwave-compression treatment resulted in the reorganization of lignin and hemicellulose, enhancing the chemical stability of bamboo, while X-ray diffraction (XRD) analysis indicated an increase in crystallinity at higher moisture contents. Overall, the study demonstrates that microwave-compression treatment can optimize the mechanical properties and dimensional stability of bamboo, particularly with moderate moisture contents. The results show that microwave-compression treatment can improve the structural performance of bamboo, especially under low-humidity conditions.
竹子作为一种可再生资源，在建筑、家具及其他领域有着广泛应用。然而，其在不同湿度条件下的尺寸稳定性和力学性能存在挑战。本研究旨在探究微波压缩处理对不同含水率竹子的力学性能、耐水性和化学成分的影响，并阐明这些变化背后的机制。实验中，对含水率分别为10%、30%和50%的竹子样本进行微波压缩处理，随后分析其力学性能、耐水性、化学成分和微观结构。结果表明，低含水率（10%）的竹子表现出最佳的弹性模量（MOE）和抗弯强度（MOR），而较高含水率（30%和50%）的竹子力学性能显著下降，不过尺寸稳定性有所提高。化学分析表明，微波压缩处理导致木质素和半纤维素重新排列，增强了竹子的化学稳定性，而X射线衍射（XRD）分析表明，较高含水率下结晶度增加。总体而言，该研究表明微波压缩处理可优化竹子的力学性能和尺寸稳定性，尤其是在中等含水率情况下。结果表明，微波压缩处理可改善竹子的结构性能，特别是在低湿度条件下。
