Pan Wei, Wang Juan, Li Yong-Ping, Sun Xiao-Bo, Wang Jin-Ping, Wang Xiao-Xiong, Zhang Jun, You Hai-Dong, Yu Gui-Feng, Long Yun-Ze
College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
College of Science and Information, Qingdao Agricultural University, Qingdao 266109, China.
Polymers (Basel). 2020 Feb 5;12(2):339. doi: 10.3390/polym12020339.
Stretchable nano-fibers have attracted dramatic attention for the utility in wearable and flexible electronics. In the present case, Ag nanowires (AgNWs)-intertwined thermoplastic polyurethanes (TPU) unwoven nano-membrane is fabricated by an electrospinning method and dip coating technique. Then a strain sensor with a spring-like configuration is fabricated by a twisted method. The sensor exhibits superior electrical conductivity up to 3990 S cm due to the high weight percentage of the Ag nanowires. Additionally, thanks to the free-standing spring-like configuration that consists of uniform neat loops, the strain sensor can detect a superior strain up to 900% at the point the sensor ruptures. On the other hand, the configuration can mostly protect the AgNWs from falling off. Furthermore, major human motion detection, like movement of a human forefinger, and minor human motion detection, such as a wrist pulse, show the possible application of the sensor in the field of flexible electronics.
可拉伸纳米纤维因其在可穿戴和柔性电子设备中的应用而备受关注。在本案例中，通过静电纺丝法和浸涂技术制备了银纳米线（AgNWs）交织的热塑性聚氨酯（TPU）无纺纳米膜。然后通过扭曲方法制备了具有弹簧状结构的应变传感器。由于银纳米线的高重量百分比，该传感器表现出高达3990 S/cm的优异电导率。此外，得益于由均匀整齐的环组成的独立弹簧状结构，应变传感器在破裂点可检测到高达900%的优异应变。另一方面，这种结构可以最大限度地保护银纳米线不掉落。此外，主要的人体运动检测，如人类食指的运动，以及次要的人体运动检测，如手腕脉搏，都表明了该传感器在柔性电子领域的潜在应用。
