writer：Qisong Shi,* , Rui Xue, Yan Huang, Shifeng He, Yibo Wuand Yongri Liang*
keywords：Piezoelectric, PAN nanofiber
source：期刊
specific source：Polymers, 2022, 14, 4573
Issue time：2022年

ract: Lightweight, flexible, and hydrophobic multifunctional piezoelectric sensors have increasingly important research value in contemporary society. They can generate electrical signals under

the action of pressure and can be applied in various complex scenarios. In this study, we prepared

a polyacrylonitrile (PAN) composite fiber doped with imidazolium type ionic liquids (ILs) and

europium nitrate hexahydrate (Eu (NO3

)3

·6H2O) by a facile method. The results show that the

PAN composite fibers had excellent mechanical properties (the elongation at break was 114% and

the elastic modulus was 2.98 MPa), hydrophobic self-cleaning ability (water contact angle reached

127.99?

), and can also emit light under UV light irradiation red fluorescence. In addition, thanks to the

induction of the piezoelectric phase of PAN by the dual fillers, the composite fibers exhibited efficient

energy storage capacity and excellent sensitivity. The energy density of PAN@Eu-6ILs reached a

maximum of 44.02 mJ/cm3 and had an energy storage efficiency of 80%. More importantly, under

low pressure detection, the sensitivity of the composite fiber was 0.69 kPa?1

. The research results

show that this PAN composite fiber has the potential to act as wearable piezoelectric devices, energy

storage devices, and other electronic devices