Combined effects of deep eutectic solvent and microwave energy treatments on cellulose fiber extraction from hemp bast
Combined effects of deep eutectic solvent and microwave energy treatments on cellulose fiber extraction from hemp bast
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DOI：
10.1007/s10570-023-05081-3
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发表时间：
2023-03-01
期刊：
影响因子：
5.7
通讯作者：
Wu, Qinglin
中科院分区：
文献类型：
--
作者：
Ahmed, Bulbul;Gwon, Jaegyoung;Wu, Qinglin
从大麻纤维中提取纯纤维素纤维用于工业纺织品等增值应用需要去除非纤维素胶物质。然而，传统的脱胶方法由于其长的处理时间、高能耗和有害的环境污染而受到很大限制。本文探讨了几种低共熔溶剂（DES）与微波能（MWE）相结合的大麻纤维脱胶方法。采用先进的分析技术对纯化的大麻纤维素纤维进行了系统的表征。结果表明，组合MWE-DES处理的协同效应能够从纤维结构中去除非纤维素组分，如木质素、半纤维素、无定形纤维素和杂质，而不破坏纤维素结构。MWE-DES处理的纤维具有更高的热稳定性（MWE-DES处理的纤维的最高降解温度达到356 ℃）、更低的残余木质素含量（2.88%）和更高的结晶度（氯化胆碱和脲DES的结晶度为83.27%）。此外，MWEDES处理过的纤维显示出对细菌生长的抑制作用，与含有生物活性化合物（类黄酮）的未处理的原大麻纤维的抑制作用相当。该方法具有效率高、处理时间短、化学品和能源消耗少、纤维质量好等特点，在大麻纤维素纤维提取中具有很大的应用潜力。[图形]。
Extracting pure cellulose fibers from hemp fibers for value-added applications like industrial textile requires the removal of non-cellulosic gummy substances. However, traditional degumming methods are largely limited due to their long process time, high energy consumption, and detrimental environmental pollution. Herein, several deep eutectic solvents (DESs) combined with microwave energy (MWE) were explored to degum hemp fibers without any further treatment. The purified hemp cellulose fibers were systematically characterized using advanced analytical techniques. Results revealed that the synergetic effect of combined MWE-DES treatment was capable of removing non-cellulosic components such as lignin, hemicellulose, amorphous cellulose, and impurities from the fiber structure without damaging the cellulose structure. MWE-DES treated fibers had higher thermal stability (maximum degradation temperature of MWE-DES treated fibers reached 356 degrees C), lower residual lignin content (2.88%), and higher crystallinity (83.27% for choline chloride and urea DES). Moreover, MWEDES treated fibers showed the inhibition of bacterial growth, comparable with that from untreated raw hemp fibers containing bioactive compounds (flavonoid). Featured with high efficiency, very short process time, less chemical and energy consumption, and high-quality fibers, this treatment method has a great potential for hemp cellulose fiber extraction.[GRAPHICS].