Jeong Chanho, Kwon Ki Yoon, Wu Di, Fu Yibo, Ye Yeong-Sinn, Lee Sang Gil, Kang Beomchan, Yao Lining, Kim Tae-Il, Majidi Carmel
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
Mater Horiz. 2025 Jul 28;12(15):5710-5722. doi: 10.1039/d5mh00462d.
Smart textiles have emerged as a promising alternative to printed circuit boards (PCBs) for electronics that are flexible, lightweight, and stretchable. However, many existing solutions fall short of providing sufficient electrical properties or are limited to single-sided circuit designs, significantly reducing their utility. In this study, we present a smart textile based on liquid metal and silver flakes that allows for double-sided circuit configurations without the need for holes, offering advantages beyond conventional PCB technologies. This approach allows users to insulate or connect top and bottom circuits as needed, even when the circuits overlap or intersect. The inherent properties of liquid metal facilitate pressure-induced sintering, working in synergy with textiles to provide users with the ability to dynamically alter circuits. This unique feature enables real-time customization, allowing for the addition, removal, or replacement of circuits through straightforward cutting and stitching processes. Demonstrating these characteristics, we showcase diverse applications, including a wristband with a replaceable LED indicator circuit, a reversible teddy bear cloth with two distinct functions, and a customizable DIY heating glove. This double-sided textile circuit that is patterned with pressure-controlled drawing offers new possibilities for multifunctional wearable electronics, bridging the gap between traditional PCBs and flexible smart textiles.
智能纺织品已成为一种有前景的替代方案，可用于制造具有柔韧性、轻便性和可拉伸性的电子产品，以取代印刷电路板（PCB）。然而，许多现有解决方案在提供足够的电气性能方面存在不足，或者仅限于单面电路设计，这大大降低了它们的实用性。在本研究中，我们展示了一种基于液态金属和银片的智能纺织品，它无需打孔即可实现双面电路配置，具有超越传统PCB技术的优势。这种方法允许用户根据需要隔离或连接顶部和底部电路，即使电路重叠或交叉也没问题。液态金属的固有特性有助于压力诱导烧结，与纺织品协同作用，为用户提供动态改变电路的能力。这一独特功能实现了实时定制，通过简单的切割和缝合工艺，用户能够添加、移除或更换电路。为展示这些特性，我们展示了多种应用，包括带有可更换LED指示灯电路的腕带、具有两种不同功能的可翻转泰迪熊布，以及可定制的DIY加热手套。这种通过压力控制绘图形成图案的双面纺织电路为多功能可穿戴电子产品提供了新的可能性，弥合了传统PCB与柔性智能纺织品之间的差距。
