State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics , Chinese Academy of Sciences , 1295 Ding Xi Road , Shanghai 200050 , P. R. China.
University of Chinese Academy of Sciences , 19 Yuquan Road , Beijing 100049 , P. R. China.
ACS Appl Mater Interfaces. 2018 Apr 25;10(16):14087-14096. doi: 10.1021/acsami.7b19699. Epub 2018 Apr 12.
As an important subfield of flexible electronics, conductive fibers have been an active area of research. The interfacial interaction between nanostructured conductive materials with elastic substrates plays a vital role in the electromechanical performance of conductive fibers. However, the underlying mechanism has seldom been investigated. Here, we propose a fabricating strategy for a silver nanowire (Ag NW)/polyurethane composite fiber with a sheath-core architecture. The interfacial bonding layer is regulated, and its influence on the performance of conductive fibers is investigated, based on which an interfacial interaction model is proposed. The model underlines the significance of the embedding depth of the Ag NW network. Both supersensitive (gauge factor up to 9557) and ultrastable (negligible conductance degradation below the strain of 150%) conductive fibers are obtained via interface regulating, exhibiting great potential in the applications of wearable sensors and stretchable conducting connections.
作为柔性电子学的一个重要分支，导电纤维一直是研究的热点。纳米结构导电材料与弹性基底之间的界面相互作用对导电纤维的机电性能起着至关重要的作用。然而，其潜在的机制很少被研究。在这里，我们提出了一种具有鞘芯结构的银纳米线（Ag NW）/聚氨酯复合纤维的制造策略。基于此，我们调控了界面结合层，并研究了其对导电纤维性能的影响，提出了一种界面相互作用模型。该模型强调了 Ag NW 网络嵌入深度的重要性。通过界面调控，得到了超灵敏（高达 9557 的应变系数）和超稳定（在 150%应变以下，电导几乎没有衰减）的导电纤维，在可穿戴传感器和可拉伸导电连接的应用中具有很大的潜力。
