Nanofiber-wrapped yarn and the related wrapping mechanisms.

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. [ABSTRACT FROM AUTHOR]