期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 185, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.indcrop.2022.115115
关键词
Ramie cellulose fiber; Deep eutectic solvent; Anthraquinone; One-step degumming; Property improvement
资金
- National Natural Science Foundation of China, China [52073051, 51925302, 51873030]
- Fundamental Research Funds for the Central Universities, China [2232022A-04]
- International Cooperation Fund of Science and Tech-nology Commission of Shanghai Municipality, China [21130750100]
- Shanghai Committee of Science and Technology, China [19QA1400100]
Adding anthraquinone as a cellulose protection agent in the degumming process of ramie fibers can enhance their properties, including an increase in degree of polymerization, crystallinity, and breaking performance. This new degumming method holds enormous potential for natural fiber extraction.
Deep eutectic solvent (DES) is proved to be versatile for ramie fiber isolation due to its high degumming efficiency and feasible recycling process. However, ramie cellulose is easily to be chemically degraded during the intense reaction if the treatment conditions cannot be properly controlled, affecting the mechanical properties of ramie fibers. In this paper, anthraquinone (AQ), serving as effective cellulose protection agent, was applied in the process of DES degumming to enhance the properties of treated fibers. Under the addition of 0.2 g/L AQ, there was an increase of 3.2% in the degree of polymerization and 5.56% in the crystallinity. Besides, the breaking tenacity, breaking elongation, and work of rupture of degummed fibers increased by 8.44%, 11.94%, and 33.33%, respectively. The chemical structure and thermal properties were also analyzed and compared between degummed fibers with or without cellulose protection agent. It is found that a small amount of AQ could improve the degradation temperature of fibers, accelerate the removal of lignin, and protect carbohydrates from excessive degradation. Considering these significant advantages, intrinsic greenness of DES, as well as the auxiliary effect and inexpensiveness of AQ, this new degumming method holds enormous potential for natural fiber extraction.
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