Hwang Byungil, Lund Anja, Tian Yuan, Darabi Sozan, Müller Christian
School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea.
Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Göteborg, Sweden.
ACS Appl Mater Interfaces. 2020 Jun 17;12(24):27537-27544. doi: 10.1021/acsami.0c04316. Epub 2020 Jun 4.
Electrically conducting fibers and yarns are critical components of future wearable electronic textile (e-textile) devices such as sensors, antennae, information processors, and energy harvesters. To achieve reliable wearable devices, the development of robust yarns with a high conductivity and excellent washability is urgently needed. In the present study, highly conductive and machine-washable silk yarns were developed utilizing a Ag nanowire and PEDOT:PSS composite coating. Ag nanowires were coated on the silk yarn via a dip-coating process followed by coating with the conjugated polymer:polyelectrolyte complex PEDOT:PSS. The PEDOT:PSS covered the Ag nanowire layers while electrostatically binding to the silk, which significantly improved the robustness of the yarn as compared with the Ag nanowire-coated reference yarns. The fabricated conductive silk yarns had an excellent bulk conductivity of up to ∼320 S/cm, which is largely retained even after several cycles of machine washing. To demonstrate that these yarns can be incorporated into e-textiles, the conductive yarns were used to construct an all-textile out-of-plane thermoelectric device and a Joule heating element in a woven heating fabric.
导电纤维和纱线是未来可穿戴电子纺织品（电子纺织品）设备（如传感器、天线、信息处理器和能量收集器）的关键组件。为了实现可靠的可穿戴设备，迫切需要开发具有高导电性和出色可洗性的坚固纱线。在本研究中，利用银纳米线和聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）复合涂层开发了高导电性且可机洗的丝绸纱线。通过浸涂工艺将银纳米线涂覆在丝绸纱线上，随后用共轭聚合物：聚电解质复合物PEDOT:PSS进行涂覆。PEDOT:PSS覆盖了银纳米线层，同时与丝绸静电结合，与涂覆银纳米线的参考纱线相比，显著提高了纱线的坚固性。制备的导电丝绸纱线具有高达约320 S/cm的优异体电导率，即使经过多次机洗循环，该电导率也基本保持不变。为了证明这些纱线可用于电子纺织品，将导电纱线用于构建全纺织面外热电装置和机织加热织物中的焦耳加热元件。
