Spraying printing of liquid metal electronics on various clothes to compose wearable functional device
Spraying printing of liquid metal electronics on various clothes to compose wearable functional device
复制标题
DOI：
10.1007/s11431-016-0657-5
复制
发表时间：
2017-02-01
影响因子：
4.6
通讯作者：
Liu, Jing
中科院分区：
文献类型：
--
作者：
Gui, Han;Tan, SiCong;Liu, Jing
液态金属印刷正在成为制造可穿戴电子产品的重要工具。然而，满足这种日益增长的需求的学术努力非常有限。本文致力于为开发可穿戴电子纺织品提供较为完整的液态金属喷印的理论和实验表征。量化了喷印过程中液态金属液滴的实际情况，如喷射速度、液滴的尺寸分布及其均匀程度、液滴的形态及其冲击基材后的展开面积等。阐明了在冲击过程中，液态金属的氧化和对织物基材的压力是保证液态金属牢固附着在织物上的主要因素。此外，对不同的衣服进行了比较研究，以测试它们在印刷液态金属导体方面的能力，其中电阻差异可以超过1000倍。除了解释喷印的基本原理和性能外，还展示了两种专门设计的可编程柔性电路，利用现有制造技术实现了闪烁LED照明和无线红外测温等功能，并对其可洗涤能力进行了评估。随着可穿戴模块的液态金属印刷技术的实现，可以预期，在未来的一段时间里，快速、直接地在布料上制造柔性功能器件将会有更广泛的应用。
Liquid metal printing is emerging as an important tool for making wearable electronics. However, very limited academic efforts were made to fulfill such an increasing need. This paper is dedicated to present relatively complete theoretical and experimental characterizations for liquid metal spraying printing towards developing wearable electronic textile. The practical conditions of liquid metal droplets in the spraying printing process such as the jet velocity, the size distribution of droplets and their evenness degree, the morphology of droplets and their unrolling areas after impacting the substrate are quantified. The dominating factors, including the oxidation of liquid metal and the pressure force on cloth substrate during the impacting process, which ensure liquid metal firmly adhere to the cloth, are clarified. Further, various clothes are comparatively investigated to test their capabilities in printing liquid metal conductors, where the resistance difference can be over thousand-fold. In addition to interpreting the basic mechanisms and performances of the spraying printing, two programmable flexible circuits with specifically designed functions such as blinking LED lighting and wireless infrared temperature measurement via current manufacture technology were also demonstrated and evaluated for their washable ability. With the realization of wearable modules via liquid metal printing technology, it can be expected that flexible functional devices on cloth fabricated quickly and directly would witness more broad applications in the coming time.