化学处理对轻木结构形貌和化学组成的影响

天然轻木细胞壁薄，木射线丰富；经化学处理、超临界干燥后得到的木材海绵仍然呈现蜂窝孔隙结构，但射线薄壁细胞破损。这是由于轻木木射线细胞壁相对木纤维更薄，为木材中的“弱相组织”。此外，由于基质成分的脱除，细胞壁横截面暴露出了大量纤维素纤丝。化学处理后木质素特征峰（1593 cm-1、1505 cm-1和1462 cm-1）及半纤维素特征峰（1736 cm-1和1235 cm-1）消失，表明木质素和半纤维素完全脱除。

Natural balsa wood has thin cell walls and abundant wood rays. The wood sponge obtained after chemical treatment and supercritical drying still exhibits a honeycomb pore structure, but the ray parenchyma cells are damaged. This is because the cell walls of balsa wood rays are thinner than those of wood fibers, making them the "weak phase tissue" in the wood. In addition, due to the removal of matrix components, a large number of cellulose fibrils are exposed on the cross-sections of the cell walls. After chemical treatment, the characteristic peaks of lignin (1593 cm⁻¹, 1505 cm⁻¹, and 1462 cm⁻¹) and those of hemicellulose (1736 cm⁻¹ and 1235 cm⁻¹) disappear, indicating that lignin and hemicellulose have been completely removed.

搜集汇总

背景与挑战

背景概述

该数据集研究了化学处理对轻木微观结构和化学成分的影响，通过场发射扫描电镜和红外光谱分析，揭示了处理导致木质素和半纤维素完全脱除，并形成蜂窝孔隙结构。数据集关联一篇论文，开发了氨基功能化木材气凝胶用于高效吸附水中铜离子，属于林学领域，数据来源于院基金项目，数据量为2.05 MB。