One critical property of a nanofibrous structure is the wicking behavior in contact with liquids. This work's purpose is fabrication and investigation of tensile and wicking properties of a newly designed three‐layer nanofibrous yarn consisting of polyamide 6/poly(L‐lactic acid) (PA/PLLA) with a similar idea to Bobtex spun yarn structure in which adhesion between core (PA) and sheath (PLLA) is provided with a thin layer of polymeric thin film. The tensile strength and strain decreased 32 and 46%, respectively, in a three‐layer yarn compared with two‐layer, that is, yarn without the adhesion film. In addition, the ultimate strength of the three‐layer yarn was higher than a PLLA yarn. The vertical wicking test for three‐layer nanofibrous yarn reveals that at short times, capillary rise kinetics follow the Lucas–Washburn law while increasing the take‐up velocity of the take‐up roller in yarn fabrication leads to increasing the maximum height of water in yarn.

中文翻译：

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三层复合纳米纤维PA / PLLA纱线的芯吸现象和拉伸性能的研究

纳米纤维结构的一个关键特性是与液体接触的芯吸行为。这项工作的目的是制造和研究由聚酰胺6 /聚（L-乳酸）（PA / PLLA）组成的新设计的三层纳米纤维纱的拉伸和芯吸特性，其原理类似于具有粘合力的Bobtex短纤纱结构在芯（PA）和外皮（PLLA）之间的薄层设有一层聚合物薄膜。与两层（即没有粘附膜的纱线）相比，三层纱线的拉伸强度和应变分别降低了32％和46％。另外，三层纱的极限强度高于PLLA纱。对三层纳米纤维纱线的垂直芯吸测试表明，在短时间内，