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Flexible strain sensor with good durability and anti-corrosion property based on metal/polymer composite films embedded with silver nanowires

Luan Jinjin, Wang Qing, Zheng Xu, Li Yao

Archives of Civil and Mechanical Engineering

2020

Vol. 20, no. 4

528--534

To avoid corrosion in sea water environment and conductive failures under external loads, a highly durable and anti-corrosion film with sandwich structure embedded with silver nanowires was fabricated as a flexible strain sensor. The effects of film size and ambient temperature on the conductivity of the sensor were studied separately. The silver nanowire-embedded strain sensor showed high durability and remained stable even after multiple bending. The PDMS coating could prevent the conductive layer from the external environment effectively. It is found that the sensor can be used effectively in sea water condition. Furthermore, the sensor connected on the steel sheet was applied in the real-time detection of microstrain in the tensile test, and the relationship between ΔR/R0 and strain illustrated high linear relationship and sensitivity. The good durability and anti-corrosion property of the conductive film showed the highly potential application to be used as a flexible strain sensor in salt-water condition.