| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Preparation and Properties of Tb3+ Doped PVDF/PLLA Electrospun Multifunctional Piezoelectric Nanofibers |
| HE Shifeng, XUE Rui, HE Yongqing, HUANG Yan, WU Yibo, SHI Qisong*
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| Beijing Key Laboratory of Special Elastomer Composite Materials, College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China |
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Abstract Electrospinning was used to blend polyvinylidene fluoride (PVDF) with a small amount of crystalline polymer (poly-L-lactic acid (PLLA)) and doped with a rare earth fluorescent complex (Tb(TTA)3(TPPO)2) prepared composite nanofibers with both yellow-green fluorescence and piezoelectric function. The effects of blend systems and rare earth complexes on the morphology, crystal structure, sensitivity, fluorescence pro-perties and other properties of PVDF composite nanofibers were studied by means of scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), atomic force microscope (AFM), X-ray diffraction (XRD) spectroscopy, differential scanning calorimetry (DSC), fluorescence (FL) and sensitivity and other characterization methods. The results show that the addition of 5wt% of the fluorescent complex can make the β phase content of the composite nanofibers reach 95%. The sensor made of composite nanofibers exhibites excellent sensitivity (0.42 kPa-1) at a pressure of 0—1 kPa. At the same time, the piezoelectric output of the sensor also has a good performance, output voltage and output current are 2.5 V and 800 nA, respectively. The composite nanofibers with both yellow-green fluorescence and piezoelectric functions are expected to be applied in piezoelectric sensors, motion monitoring systems, bioelectronic skin and other fields.
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Published: 25 April 2024
Online: 2024-04-28
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| Fund:National Natural Science Foundation of China (52073033). |
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