Hemp bast fibers were degummed using combined microwave energy (MWE) and deep eutectic solvent (DES) to generate pure hemp cellulose fibers for potential textile applications. The properties of the degummed fibers were investigated and compared with those of the alkali-treated fibers using several analytical techniques. Results revealed that hemp fiber surface underwent dramatic structural disruption during the pretreatment, due to the removal of “gummy” compounds (i.e., pectin, oil, wax, etc.), lignin, and amorphous cellulose. The treated fibers had much enhanced thermal stability due to the removal of the gummy materials. The reduced enthalpy (171.34 J/g) of MWE-DES treated fibers at 1:20 fiber-DES ratio as compared to that of raw hemp fibers (272.09 J/g) also confirmed the higher thermal stability of MWE-DES treated fibers. Chemical composition analysis showed that the holocellulose content in the treated fiber samples at 1:20 fiber-DES ratio increased to 98.63% which was comparable with the holocellulose content (98.87%) of the alkali-treated fibers. The Ultraviolet (UV) protection factor (UPF) of MWE-DES treated fibers at 1:10 and 1:20 fiber-DES ratio was, respectively, 118.11 and 114.19, meeting the requirement of UV resistant textile fibers. The study demonstrates a potentially effective, less time-consuming, and environmentally sustainable protocol for manufacturing purified hemp cellulose fibers using combined MWE-DES treatment.

使用组合微波能量 (MWE) 和深共熔溶剂 (DES) 对大麻韧皮纤维进行脱胶，以生成用于潜在纺织应用的纯大麻纤维素纤维。使用几种分析技术研究了脱胶纤维的性能并与碱处理纤维的性能进行了比较。结果表明，大麻纤维表面在预处理，由于去除了“粘性”化合物（即果胶、油、蜡等）、木质素和无定形纤维素。由于去除了胶状材料，处理过的纤维具有大大增强的热稳定性。与粗麻纤维 (272.09 J/g) 相比，MWE-DES 处理的纤维在 1:20 的纤维-DES 比率下的降低的焓 (171.34 J/g) 也证实了 MWE-DES 处理的纤维具有更高的热稳定性。化学成分分析表明，以 1:20 的纤维-DES 比例处理的纤维样品中的全纤维素含量增加到 98.63%，与碱处理纤维的全纤维素含量 (98.87%) 相当。MWE-DES处理的纤维在纤维-DES比例为1:10和1:20时的紫外线（UV）防护系数（UPF）分别为118.11和114.19，满足抗紫外线纺织纤维的要求。