School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
China Astronaut Research and Training Center, Beijing 100094, China.
ACS Appl Mater Interfaces. 2021 Feb 24;13(7):9053-9063. doi: 10.1021/acsami.1c00864. Epub 2021 Feb 14.
The emerging personal healthcare has significantly propelled the development of advanced wearable electronics with novel functions of providing diagnostic information and point-of-care therapies for specific diseases. However, it is still challenging to simultaneously achieve high sensitivity for health biomonitoring and multifunction integration for point-of-care therapies in a one single flexible, lightweight yet robust fiber-based device. Here, a knittable and sewable spandex yarn with conductive nacre-mimetic composite coating has been developed through an alternant dip-coating method employing MXene nanosheets as the "brick" and polydopamine (PDA)/Ni as the "mortar". The resultant spandex yarn coating with MXene/PDA/Ni (MPNi@Spandex) can be assembled as a strain sensor with high sensitivity (up to 5.7 × 10 for the gauge factor), wide sensing range (∼61.2%), and low detection limit (0.11%) to monitor the biological activities of the human body. Furthermore, MPNi@Spandex displays great potential to give on-demand thermotherapy by virtue of the fast response to near-infrared irradiation, controllable surface temperature, and applicability even under sewing conditions. In addition, MPNi@Spandex knitted textiles demonstrate a strong antibacterial effect due to the sharp edges, anionic, and hydrophilic nature of MXene nanosheets. Remarkably, near-infrared irradiation further improves the bacteria-killing efficiency of an MPNi@Spandex knitted textile to more than 99.9%. This work paves the way for the design of multifunctional wearable electronics with an all-in-one theranostic platform for personal healthcare.
新兴的个人医疗保健极大地推动了先进可穿戴电子产品的发展，这些电子产品具有提供诊断信息和针对特定疾病的即时治疗的新功能。然而，在单一的灵活、轻巧且坚固的纤维基设备中，同时实现健康生物监测的高灵敏度和即时治疗的多功能集成仍然具有挑战性。在这里，通过交替的浸涂方法，使用 MXene 纳米片作为“砖”和聚多巴胺（PDA）/Ni 作为“灰浆”，开发了一种可编织和可缝合的氨纶纱线，具有导电珍珠母仿生复合涂层。所得的 MXene/PDA/Ni（MPNi@Spandex）氨纶纱涂层可组装成应变传感器，具有高灵敏度（高达 5.7×10 的应变系数）、宽传感范围（约 61.2%）和低检测限（0.11%），可监测人体的生物活性。此外，MPNi@Spandex 由于对近红外辐射的快速响应、可控的表面温度以及即使在缝纫条件下也具有适用性，因此具有很大的潜力进行按需热疗。此外，MPNi@Spandex 针织纺织品由于 MXene 纳米片的锋利边缘、阴离子和亲水性，表现出很强的抗菌效果。值得注意的是，近红外辐射进一步将 MPNi@Spandex 针织纺织品的杀菌效率提高到 99.9%以上。这项工作为设计具有一体化治疗平台的多功能可穿戴电子产品铺平了道路，可用于个人医疗保健。
