Zhong Tao, Jin Ning, Yuan Wei, Zhou Chunshan, Gu Weibing, Cui Zheng
Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of information Engineering, China Jiliang University (CJLU), Hangzhou 310018, China.
Printable Electronics Research Centre, Suzhou Institute of Nanotech and nano-bionics, Chinese Academy of Sciences (SINANO), Suzhou 215123, China.
Materials (Basel). 2019 Sep 19;12(18):3036. doi: 10.3390/ma12183036.
A printable elastic silver ink has been developed, which was made of silver flakes, dispersant, and a fluorine rubber and could be sintered at a low temperature. The printed elastic conductors showed low resistivity at 21 μΩ·cm, which is about 13.2 times of bulk silver (1.59 μΩ·cm). Their mechanical properties were investigated by bending, stretching, and cyclic endurance tests. It was found that upon stretching the resistance of printed conductors increased due to deformation and small cracks appeared in the conductor, but was almost reversible when the strain was removed, and the recovery of conductivity was found to be time dependent. Radio-frequency identification (RFID) tags were fabricated by screen printing the stretchable silver ink on a stretchable fabric (lycra). High performance of tag was maintained even with 1000 cycles of stretching. As a practical example of wearable electronics, an RFID tag was printed directly onto a T-shirt, which demonstrated its normal working order in a wearing state.
一种可印刷的弹性银墨已被研发出来，它由银片、分散剂和氟橡胶制成，并且可以在低温下烧结。印刷的弹性导体在21μΩ·cm时显示出低电阻率，这大约是块状银（1.59μΩ·cm）的13.2倍。通过弯曲、拉伸和循环耐久性测试研究了它们的机械性能。结果发现，在拉伸时，印刷导体的电阻由于变形而增加，并且导体中出现小裂缝，但当应变消除时几乎是可逆的，并且发现电导率的恢复与时间有关。通过在可拉伸织物（莱卡）上丝网印刷可拉伸银墨来制造射频识别（RFID）标签。即使经过1000次拉伸循环，标签仍保持高性能。作为可穿戴电子产品的一个实际例子，一个RFID标签被直接印刷在一件T恤上，这证明了它在穿着状态下能正常工作。
