In this paper, we report new results related to the development of a novel regenerated cellulose fiber process of the Lyocell type, denoted Ioncell™, and characterized by the use of a powerful direct cellulose solvent, 1,5-diaza- bicyclo[4.3.0]non-5-enium acetate ([DBNH][OAc]) a superbase-based ionic liquid (IL). The focus of this work is on the effects of air gap conditioning (AGC) during the dry-jet wet spinning operation. The installation of an AGC system on the spinning line led to significant improvements of the fiber properties. The fiber titer variation decreased significantly, and the fiber toughness increased by approximately 50% when controlling the temperature and the relative humidity in the airgap using a convective air flow. The presence of water vapor in the air stream was a determinant factor for the improvement of the fiber elongation. The interaction of water vapor with the spinning dope was investigated using dynamic vapor sorption. The diffusion coefficient of water vapor inside the dope could be identified from those experiments and used in a numerical simulation model of the heat and water vapor transfer in the air gap between the spinning dope and the surrounding air. The experimental and simulation results suggest that dope convective cooling and surface hydration lead to a higher fiber toughness.

在本文中，我们报告了与开发新的莱赛尔纤维再生纤维素纤维工艺（称为Ioncell™）有关的新结果，其特征在于使用了功能强大的直接纤维素溶剂1,5-二氮杂双环[4.3]。 0]非乙酸五烯盐（[DBNH] [OAc]）-一种基于超碱的离子液体（IL）。这项工作的重点是在干喷湿纺过程中气隙调节（AGC）的影响。在纺丝线上安装AGC系统可显着改善纤维性能。当使用对流气流控制气隙中的温度和相对湿度时，纤维纤度变化显着降低，并且纤维韧性提高了约50％。空气流中水蒸气的存在是改善纤维伸长率的决定性因素。使用动态蒸气吸附研究了水蒸气与纺丝原液的相互作用。可以从这些实验中确定涂料中水蒸气的扩散系数，并将其用于纺丝原液和周围空气之间的气隙中热量和水蒸气传递的数值模拟模型。实验和模拟结果表明，涂​​料的对流冷却和表面水合会导致更高的纤维韧性。可以从这些实验中确定涂料中水蒸气的扩散系数，并将其用于纺丝原液和周围空气之间的气隙中热量和水蒸气传递的数值模拟模型。实验和模拟结果表明，涂​​料的对流冷却和表面水合会导致更高的纤维韧性。可以从这些实验中确定涂料内部的水蒸气扩散系数，并将其用于纺丝涂料与周围空气之间的气隙中热量和水蒸气传递的数值模拟模型。实验和模拟结果表明，涂​​料的对流冷却和表面水合会导致更高的纤维韧性。