Environmentally Friendly Protective Coating for Electrically Conductive Yarns Using in Smart Textiles

Carola H. Böhmer, Mareen N Warncke, P. Böhnke, A. Nocke, Johannes Mersch, Iris Kruppke, Chokri Cherif
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Abstract

Current research focuses on advancements and breakthroughs in the realm of smart textiles, with applications spanning various industries such as medicine and education. For producing flexible smart textiles, electrically conductive yarns (EC) are needed to transmit signals or as part of sensor systems. Mostly, these EC consist of a polymer core with an outer metallized layer. Using EC in contact with skin requires high reliability and safety, and thus, the EC must maintain their functional properties on a long-term scale under a range of different stresses. The electrical properties of EC deteriorate under mechanical stress applied during production or in-use through damage to the yarn’s surface. At present, there are only partially feasible solutions to protect the metal-layer of the yarn surface. Hence, this paper presents a newly developed non-toxic coating (NTC) to protect the EC surface. The NTC consists of an aqueous emulsion with polypropylene wax and oxidized wax. To determine the long-term stability of the coating, the produced yarns undergo comprehensive evaluation using a range of analytical techniques. The aim is to identify the optimal coating by exploring different equipment and parameters. Additionally, it is various test methods to gauge the durability of the newly developed NTC used and ensure its reliability over time. To characterize the yarn properties before and after the coating, light microscopy (LM), washing processes, mechanical resistance tests and resistivity measurement are conducted.
用于智能纺织品中导电纱线的环保型保护涂层
目前的研究重点是智能纺织品领域的进展和突破,其应用领域涉及医疗和教育等多个行业。生产柔性智能纺织品需要导电纱线(EC)来传输信号或作为传感器系统的一部分。这些导电纱通常由聚合物芯和金属化外层组成。使用导电纱与皮肤接触需要很高的可靠性和安全性,因此,导电纱必须在一系列不同的压力下长期保持其功能特性。在生产过程中施加机械应力,或在使用过程中纱线表面受损,都会导致导电率降低。目前,只有部分可行的解决方案可以保护纱线表面的金属层。因此,本文提出了一种新开发的无毒涂层(NTC)来保护导电率极高的纱线表面。NTC 由聚丙烯蜡和氧化蜡的水性乳液组成。为了确定涂层的长期稳定性,使用一系列分析技术对生产的纱线进行了全面评估。目的是通过探索不同的设备和参数来确定最佳涂层。此外,还采用各种测试方法来衡量新开发的 NTC 的耐用性,并确保其长期可靠性。为了鉴定涂层前后的纱线特性,进行了光学显微镜 (LM)、清洗过程、机械电阻测试和电阻率测量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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