压电
材料科学
纳米纤维
静电纺丝
复合材料
聚合物
压电传感器
聚脲
纳米技术
聚氨酯
作者
Xiaoxia Gu,Meng Cui,Bin Wang,Chenghao Zhang,Yanlong Zhu,Xu Jin,Rui Wang,Xiuqin Zhang
标识
DOI:10.1002/adsu.202200441
摘要
Abstract Developing piezoelectric polymers which have environmental‐friendly raw material resources and can be used for wearable electronic devices, are of great significance for reducing dependence on fossil energy and achieving the goal of carbon neutrality. Poly (L‐lactic acid) (PLLA) is a bio‐based piezoelectric polymer and has important research value. To optimize the properties of materials, electrospinning technology is used for preparing nanofiber films by combining PLLA with CO 2 ‐based polyurea (PU) synthesized from CO 2 and diamine, and assembling the piezoelectric sensors. The results show that when the amount of PU is 16 wt%, the voltage of the PU/PLLA piezoelectric sensor is 19 V, which is 15 times that of the PLLA piezoelectric sensor and has good stability and durability. The high dipole moment of NHCONH in PU and the synergistic effect between PU and PLLA are the keys to improving the piezoelectric property of nanofiber film. This is the first report on the preparation of composite piezoelectric materials using CO 2 ‐based polymer and PLLA. PU/PLLA piezoelectric sensor can produce a good piezoelectric response to human vital signs and motion states. As a self‐powered sensor, it has potential application in the field of intelligent wearable devices.
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