Scouring and bleaching are essential steps in flax yarn production; however, in many cases, these treatments have relatively low selectivity on non-cellulosic polysaccharides (NCPs) and lignin. Herein, the specific chemical properties of flax fibers through a variety of scouring and/or bleaching procedures are reviewed to understand their correlations with the mechanical and morphological characteristics. The hydrolysis behaviors of hemicellulose and lignin are different from those of cellulose during chlorine-alkali-oxygen (Cl-AO), enzyme-alkali-oxygen (EAO), and alkali-oxygen (AO) treatments, while the structural hemicellulose polysaccharides fractions were not affected by acid pretreatment followed by alkali scouring (AA) treatment. It was found that the unbleached AA treatment improved scouring efficiency to the greatest extent by decreasing 73.3 % of hemicellulose content and 59.8 % of lignin content compared to the untreated flax fibers and obtained the highest tensile strength (6.58 cN/dtex) and elongation (3.73 %). Delignification was more crucial on fiber tenacity and fineness than hemicellulose removal (R² = 0.71, 0.79 vs R² = 0.46, 0.61). Within the hemicellulose fractions, a corresponding beneficial relationship between the xylan (XYL) composition and flax fiber properties is presented. The correlation of GM and GGM contents in hemicellulose with flax fiber length was significant with R² value 0.97 and 0.99, respectively. This study provides insight into the hydrolysis behavior of hemicellulose and a basis for developing scouring and/or bleaching models that can predict fiber properties.

精练和漂白是亚麻纱线生产中必不可少的步骤。然而，在许多情况下，这些处理对非纤维素多糖（NCPs）和木质素的选择性较低。在此，回顾了通过各种精练和/或漂白程序的亚麻纤维的特定化学性质，以了解其与机械和形态特征的相关性。在氯碱氧（Cl-AO），酶碱氧（EAO）和碱氧（AO）处理过程中，半纤维素和木质素的水解行为与纤维素不同，而结构性半纤维素多糖馏分为不受酸预处理和碱精练（AA）处理的影响。发现未经漂白的AA处理与未处理的亚麻纤维相比，通过降低半纤维素含量的73.3％和木质素含量的59.8％，最大程度地提高了精练效率，并获得了最高的拉伸强度（6.58 cN / dtex）和伸长率（3.73） ％）。脱木素处理对纤维的韧性和细度比半纤维素的去除更为关键（R ² = 0.71，0.79 vs R ² = 0.46，0.61）。在半纤维素部分内，给出了木聚糖（XYL）组成和亚麻纤维性能之间的相应有益关系。半纤维素中GM和GGM含量与亚麻纤维长度的相关性显着，R ²值分别为0.97和0.99。这项研究提供了对半纤维素水解行为的深入了解，并为开发可以预测纤维性能的精练和/或漂白模型奠定了基础。