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Stretchable Conductive Fibers Based on a Cracking Control Strategy for Wearable Electronics
Advanced Functional Materials ( IF 16.836 ) Pub Date : 2018-05-22 , DOI: 10.1002/adfm.201801683
Bo Zhang,Jie Lei,Dianpeng Qi,Zhiyuan Liu,Yu Wang,Gengwu Xiao,Jiansheng Wu,Weina Zhang,Fengwei Huo,Xiaodong Chen

Stretchability plays an important role in wearable devices. Repeated stretching often causes the conductivity dramatically decreasing due to the damage of the inner conductive layer, which is a fatal and undesirable issue in this field. Herein, a convenient rolling strategy to prepare conductive fibers with high stretchability based on a spiral structure is proposed. With the simple rolling design, low resistance change can be obtained due to confined elongation nof the gold thin‐film cracks, which is caused by the encapsulated effect in such a structure. When the fiber is under 50% strain, the resistance change (R/R0) is about 1.5, which is much lower than a thin film at the same strain (R/R0 ≈ 10). The fiber can even afford a high load strain (up to 100%), but still retain good conductivity. Such a design further demonstrates its capability when it is used as a conductor to confirm signal transfer with low attenuation, which can also be woven into textile to fabricate wearable electronics.

中文翻译:

基于裂纹控制策略的可穿戴电子可拉伸导电纤维

伸缩性在可穿戴设备中起着重要作用。重复拉伸通常由于内部导电层的损坏而导致电导率急剧下降,这是该领域中的致命和不希望的问题。在此,提出了一种方便的轧制策略,以基于螺旋结构来制备具有高拉伸性的导电纤维。通过简单的轧制设计,由于金薄膜裂纹的局限伸长率,可以得到低电阻变化,这是由于这种结构中的封装效应引起的。当光纤处于50%应变下时,电阻变化(R / R 0)约为1.5,远低于相同应变下的薄膜(R / R 0)≈10)。光纤甚至可以提供高的负载应变(高达100%),但仍保持良好的导电性。这种设计在用作导体以确认信号衰减低的情况下进一步证明了其功能,也可以将其编织到纺织品中以制造可穿戴电子产品。
更新日期:2018-05-22
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