ABSTRACT

An eco-friendly and effective degumming method needed to be developed for producing kenaf bast fibers. This study devised a novel deep eutectic solvent (DES) method coupled with microwave and alkaline-ultrasonic treatment. The novel method could effectively remove the gummy matters, providing a smooth and clean fiber surface. The properties of the fibers were assessed including chemical compositions, surface structure, crystallinity index (66.68%) and thermal properties. The residual gum content (9.419%), fiber fineness (4.125tex), breaking tenacity (13.650 cn/tex) of the refined dry fibers produced by the novel treatment were comparable with the fibers produced by the traditional two-step alkali boiling method. Besides, the novel method could reduce the usage of chemical, water and time by 48.9%, by 66.7% and 66.8%, respectively. These results revealed that the novel combined DES pretreatment is a practical and feasible pretreatment method for kenaf bast degumming, demonstrating its facile, green energy-saving and fast properties in the degumming process.

摘要

需要开发一种环保且有效的脱胶方法来生产红麻韧皮纤维。本研究设计了一种结合微波和碱性超声处理的新型深共熔溶剂 (DES) 方法。新方法可以有效去除胶状物质，提供光滑清洁的纤维表面。对纤维的性能进行了评估，包括化学成分、表面结构、结晶度指数（66.68%）和热性能。经新处理的精制干纤维的残胶量（9.419%）、纤维细度（4.125tex）、断裂强力（13.650 cn/tex）与传统两步碱煮法生产的纤维相当。此外，新方法可减少化学品、水和时间的使用量分别为48.9%、66.7%和66.8%。