Key Laboratory of Sensors, Beijing Information Science and Technology University, Beijing 100192, China.
School of Instrument Science and Opto-Electronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China.
Int J Mol Sci. 2022 Oct 31;23(21):13236. doi: 10.3390/ijms232113236.
Flexible sensing can disruptively change the physical form of traditional electronic devices to achieve flexibility in information acquisition, processing, transmission, display, and even energy, and it is a core technology for a new generation of the industrial internet. Fabric is naturally flexible and stretchable, and its knitted ability makes it flexibility and stretchability even more adjustable. However, fabric needs to be electrically conductive to be used for flexible sensing, which allows it to carry a variety of circuits. The dip-coating technique is a common method for preparing conductive fabrics, which are made conductive by attaching conductive fillers to the fabrics. However, the adhesion of the conductive fillers on the surface of such conductive fabrics is weak, and the conductive property will decay rapidly because the conductive filler falls off after repeated stretching, limiting the lifespan of flexible electronic devices based on conductive fabric. We chose multifunctional nanosilver as a conductive filler, and we increased the adhesion of nanosilver to fabric fiber by making nanosilver grow in situ and cover the fiber, so as to obtain conductive fabric with good conductivity. This conductive fabric has a minimum square resistance of 9 Ω/sq and has better electrical conductivity and more stable electrical properties than the conductive fabric prepared using the dip-coating process, and its square resistance did not increase significantlyafter 60 stretches.
柔性传感可以彻底改变传统电子设备的物理形态,实现信息获取、处理、传输、显示甚至能源的灵活性,是新一代工业互联网的核心技术。织物本身具有柔韧性和拉伸性,其编织能力使其柔韧性和拉伸性更具可调性。然而,织物需要具有导电性才能用于柔性传感,这使其能够承载各种电路。浸涂技术是制备导电织物的常用方法,通过将导电填料附着在织物上来使织物具有导电性。然而,这种导电织物表面的导电填料的附着力较弱,由于反复拉伸后导电填料脱落,其导电性会迅速衰减,从而限制了基于导电织物的柔性电子设备的使用寿命。我们选择多功能纳米银作为导电填料,通过使纳米银原位生长并覆盖纤维,增加了纳米银与纤维的附着力,从而获得了具有良好导电性的导电织物。这种导电织物的最小方块电阻为 9 Ω/sq,具有更好的导电性和更稳定的电性能,与采用浸涂工艺制备的导电织物相比,其方块电阻在 60 次拉伸后没有明显增加。