We describe the wet and dry‐wet spinning of multifilament cellulosic composite fibers, namely chitin/cellulose fibers. The direct solution process for the two biopolymers based on an ionic liquid as solvent represents an environmentally friendly and alternative technology to the industrially applied viscose and lyocell process. Both cellulose and chitin possess good solubility in 1‐ethyl‐3‐methylimidazolium propionate ([C₂C₁Im][OPr]) and were spun into multifilament composite fibers. Moreover, for the first time, pure chitin multifilament fibers were obtained by dry‐wet spinning. The effect of chitin addition on the filament properties was investigated and evaluated by microscopic, spectroscopic, and mechanical analyses.

中文翻译：

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通过湿法和干法湿法纺丝制备的几丁质/纤维素共混纤维

我们描述了多丝纤维素复合纤维（即几丁质/纤维素纤维）的湿法和干法湿法纺丝。两种基于离子液体作为溶剂的生物聚合物的直接溶液法代表了一种工业应用的粘胶和莱赛尔工艺的环保替代技术。纤维素和几丁质在丙酸1-乙基-3-甲基咪唑鎓（[C ₂ C ₁ Im] [OPr]）中均具有良好的溶解性，并被纺成复丝复合纤维。而且，这是第一次通过干湿纺丝获得纯的几丁质复丝纤维。通过显微镜，光谱和机械分析研究和评估了几丁质添加对长丝性能的影响。