Tb^(3+)掺杂PVDF/PLLA多功能压电纤维的制备及性能

Preparation and Properties of Tb 3+Doped PVDF/PLLA Electrospun Multifunctional Piezoelectric Nanofibers

采用静电纺丝方法,将聚偏氟乙烯(PVDF)与少量结晶聚合物(聚-L-乳酸(PLLA))共混,并将共混体系掺入稀土荧光配合物(Tb(TTA)_(3)-(TPPO)_(2))中制备出兼具黄绿色荧光和压电功能的复合纳米纤维。通过扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)、原子力显微镜(AFM)、X射线衍射(XRD)光谱、差示扫描量热(DSC)仪、荧光光谱(FL)仪、灵敏度测试等表征手段研究了共混体系和稀土荧光配合物对PVDF复合纳米纤维形貌、结晶结构、灵敏度、荧光性能等的影响。结果表明,添加5%(质量分数)的荧光配合物可以使复合纳米纤维的β相含量达到95%,在0~1 kPa的压力下,由复合纳米纤维制成的传感器表现出优异的灵敏度(0.42 kPa^(-1))。同时,传感器的压电输出也具有良好的表现,输出电压和输出电流分别为2.5 V和800 nA。这种兼具黄绿色荧光及压电功能的复合纳米纤维有望应用于压电传感器、运动监测系统和生物电子皮肤等领域。

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 theβphase 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.