Abstract A wet-type solution blow spinning system equipped with a single concentric nozzle was assembled to investigate the key factors for preparing ultrafine regenerated cellulose fibers. The effects of the degree of polymerization (DP) of cellulose and the velocity of blown air on fiber morphology were studied by rheological analyses and scanning electron microscopy. The results demonstrated that cellulose with a DP of 2365, together with a high air velocity, could aid the formation of continuous ultrafine fibers. Fluid filament deformation was observed using a high-speed camera and clearly correlated with the final fiber morphology. Additionally, aligned ultrafine fibers were spun on a rotational collector and their mechanical properties and structural parameters were characterized. Ultrafine cellulose fibers with a high strength of 941.4 MPa and a high crystallite orientation of 0.909 were obtained.

中文翻译：

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溶液吹塑法生产的高强度超细纤维素纤维

摘要 为研究制备超细再生纤维素纤维的关键因素，组装了配备单一同心喷嘴的湿式溶液吹纺系统。通过流变分析和扫描电子显微镜研究了纤维素的聚合度 (DP) 和吹气速度对纤维形态的影响。结果表明，DP 为 2365 的纤维素与高空气速度一起有助于形成连续的超细纤维。使用高速相机观察流体长丝变形，并且与最终纤维形态明显相关。此外，对齐的超细纤维在旋转收集器上纺丝，并表征了它们的机械性能和结构参数。超细纤维素纤维，强度高达 941。