Zhao Wenjuan, Zhang Jian, Zhang Wenfu, Wang Jin, Wang Ge
Zhejiang Academy of Forestry, Hangzhou 310023, China.
College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China.
Materials (Basel). 2022 May 11;15(10):3463. doi: 10.3390/ma15103463.
The chemical content, mechanical capability, and dimensional stability of bamboo fibers (BFs) are all directly related to the hygroscopic behavior, which is crucial for industrial applications. To support the utilization of BFs, the structural and chemical composition of BFs with different opening times after mechanical rolling were investigated in this study, and the Guggenheim-Anderson-de Boer (GAB) model was selected to predict their moisture-adsorption properties. The results showed that the length and diameter of the fibers gradually decreased with the increase in the number of openings, and the fibers gradually separated from bundles into single fibers. It was also observed that the treated BFs exhibited different equilibrium moisture contents (EMCs). BFs with a smaller number of openings had a higher hemicellulose content and more exposed parenchyma cells on the fibers, which increased the number of water adsorption sites. As the number of openings increased, the parenchyma cells on the fibers decreased, and the lignin content increased, which reduced the number of fiber moisture-adsorption sites and decreased the EMC of the fibers.
竹纤维（BFs）的化学成分、机械性能和尺寸稳定性均与吸湿行为直接相关，而吸湿行为对工业应用至关重要。为支持竹纤维的利用，本研究对机械轧制后不同开松次数的竹纤维的结构和化学成分进行了研究，并选择 Guggenheim-Anderson-de Boer（GAB）模型来预测其吸湿性能。结果表明，随着开松次数的增加，纤维的长度和直径逐渐减小，纤维逐渐从束状分离成单纤维。还观察到，经处理的竹纤维表现出不同的平衡含水率（EMCs）。开松次数较少的竹纤维半纤维素含量较高，纤维上薄壁细胞暴露较多，增加了水吸附位点的数量。随着开松次数的增加，纤维上的薄壁细胞减少，木质素含量增加，这减少了纤维吸湿位点的数量，降低了纤维的平衡含水率。
