Regnier Julie, Cayla Aurélie, Campagne Christine, Devaux Éric
GEMTEX-Laboratoire de Génie et Matériaux Textiles, ENSAIT, Univ. Lille, F-59000 Lille, France.
Nanomaterials (Basel). 2021 Dec 29;12(1):92. doi: 10.3390/nano12010092.
In many textile fields, such as industrial structures or clothes, one way to detect a specific liquid leak is the electrical conductivity variation of a yarn. This yarn can be developed using melt spun of Conductive Polymer Composites (CPCs), which blend insulating polymer and electrically conductive fillers. This study examines the influence of the proportions of an immiscible thermoplastic/elastomer blend for its implementation and its water detection. The thermoplastic polymer used for the detection property is the polyamide 6.6 (PA6.6) filled with enough carbon nanotubes (CNT) to exceed the percolation threshold. However, the addition of fillers decreases the polymer fluidity, resulting in the difficulty to implement the CPC. Using an immiscible polymers blend with an elastomer, which is a propylene-based elastomer (PBE) permits to increase this fluidity and to create a flexible conductive monofilament. After characterizations (morphology, rheological and mechanical) of this blend (PA6.6/PBE) in different proportions, two principles of water detection are established and carried out with the monofilaments: the principle of absorption and the short circuit. It is found that the morphology of the immiscible polymer blend had a significant role in the water detection.
在许多纺织领域，如工业结构或服装中，检测特定液体泄漏的一种方法是通过纱线的电导率变化。这种纱线可以通过导电聚合物复合材料（CPC）的熔纺来制备，CPC是由绝缘聚合物和导电填料混合而成。本研究考察了不相容热塑性/弹性体共混物的比例对其应用及水检测的影响。用于检测性能的热塑性聚合物是填充了足够多碳纳米管（CNT）以超过渗滤阈值的聚酰胺6.6（PA6.6）。然而，填料的添加会降低聚合物的流动性，导致CPC难以应用。使用与弹性体（一种基于丙烯的弹性体（PBE））的不相容聚合物共混物可以提高这种流动性，并制造出一种柔性导电单丝。在对该共混物（PA6.6/PBE）不同比例进行表征（形态、流变学和力学）后，建立了两种水检测原理并通过单丝进行了验证：吸收原理和短路原理。发现不相容聚合物共混物的形态在水检测中起着重要作用。
