Abstract

In this study, to improve the weavability of nanofibers, a self-developed electrospun nanofiber yarn-wrapping device and a hollow spindle yarn-wrapping device were created, and a layer of yarn or filament was applied to form a wrapped yarn. This type of wrapped yarn can overcome the shortcomings of the poor mechanical properties and poor wear resistance of electrospun nanofibers inherent in traditional weaving/knitting processes. The breaking strength of the wrapped yarn is found to be higher than that of the core yarn. According to the wrapping effect, the hollow spindle wrapping can be divided into three cases, namely h_n < d_w, h_n = d_w, and h_n > d_w, which respectively correspond to the three phenomena of over-wrapped, well-wrapped, and core-exposed yarn. When the wrapped structure is broken, the core yarn and the outer yarn are simultaneously stretched under the action of external tension. The tensile deformation of the core yarn is first broken, and the outer yarn then begins to experience individual stress, resulting in stretching and untwisting until it breaks. The research conclusions have guiding significance for the expansion of the application of nanofibers in traditional textiles.

摘要

本研究为提高纳米纤维的可织性，研制了自主研发的电纺纳米纤维包纱装置和中空锭子包纱装置，并应用一层纱线或长丝形成包纱。这种包覆纱可以克服传统编织/针织工艺所固有的电纺纳米纤维机械性能差、耐磨性差的缺点。发现包缠纱的断裂强度高于包芯纱的断裂强度。根据缠绕效果，空心锭缠绕可分为三种情况，即h _n < d _w、h _n = d _w、h _n> d _w，分别对应过包、包好、露芯三种现象。当包缠结构断裂时，芯纱和外纱在外拉力的作用下同时被拉伸。包芯纱的拉伸变形首先断裂，然后外纱开始受到个别应力，导致拉伸和解捻，直至断裂。研究结论对拓展纳米纤维在传统纺织品中的应用具有指导意义。