The influence of conditioning baths on the structure and properties of fibers spun from cellulose with low alpha content

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers Pub Date : 2025-09-25 DOI:10.1016/j.carbpol.2025.124472

Igor Makarov , Markel Vinogradov , Ekaterina Palchikova , Yuriy Kulanchikov , Ivan Levin , Alexander Procko , Konstantin Sinyaev , Stanislav Ermakov , Valery Kulichikhin , Elena Fedorova , Igor Govyazin

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Abstract

For many years, the production of artificial cellulose fibers has been associated with the viscose process, which is inherently environmentally hazardous and unacceptable in modern conditions. The NMMO process is an alternative in which cellulose solutions are obtained using a direct solvent, N-methylmorpholine-N-oxide (NMMO). Spinning solutions in NMMO can be made from cellulose with a high concentration of impurities (lignin, hemicellulose, etc.). Metals that affect solvent and polymer stability are an exception; their content should not exceed the acceptable levels. Conditioning fibers in baths of diverse compositions is one of the most important stages of structure formation. Keeping fibers made from paper-grade pulp in conditioning baths causes changes in not only the size of crystallites and the degree of crystallinity, but also in mechanical characteristics. Thus, after completely removing the solvent and immersing the fibers in alcohol, the crystallinity rises as compared to fibers that have just received water baths. Strength and elastic modulus attain their peak values, while relative elongation falls to 3–6 %. Regardless of the structural alteration, all corrugated fibers keep their crimp, color, and organoleptic qualities.

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调质浴对低含量纤维素纺成纤维结构和性能的影响

多年来，人造纤维素纤维的生产一直与粘胶工艺有关，粘胶工艺本身对环境有害，在现代条件下是不可接受的。NMMO工艺是使用直接溶剂n -甲基- n -氧化物（NMMO）获得纤维素溶液的一种替代方法。NMMO中的纺丝溶液可以由含有高浓度杂质（木质素、半纤维素等）的纤维素制成。影响溶剂和聚合物稳定性的金属是例外；其内容不应超过可接受的水平。不同成分浴槽中的调理纤维是结构形成的重要阶段之一。将纸张级纸浆制成的纤维放在调理浴中，不仅会引起晶体大小和结晶度的变化，而且会引起机械特性的变化。因此，在完全去除溶剂并将纤维浸泡在酒精中后，与刚刚接受水浴的纤维相比，结晶度提高了。强度和弹性模量达到峰值，而相对伸长率下降到3 - 6%。无论结构如何改变，所有波纹纤维都保持其卷曲，颜色和感官品质。

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来源期刊

Carbohydrate Polymers 化学-高分子科学

CiteScore

22.40

自引率

8.00%

发文量

1286

审稿时长

47 days

期刊介绍： Carbohydrate Polymers stands as a prominent journal in the glycoscience field, dedicated to exploring and harnessing the potential of polysaccharides with applications spanning bioenergy, bioplastics, biomaterials, biorefining, chemistry, drug delivery, food, health, nanotechnology, packaging, paper, pharmaceuticals, medicine, oil recovery, textiles, tissue engineering, wood, and various aspects of glycoscience. The journal emphasizes the central role of well-characterized carbohydrate polymers, highlighting their significance as the primary focus rather than a peripheral topic. Each paper must prominently feature at least one named carbohydrate polymer, evident in both citation and title, with a commitment to innovative research that advances scientific knowledge.