Structure and properties of poly(lactide-co-glycolide) ultrafine fibers adjusted and controlled by multi-walled carbon nanotubes

The blend solutions consisted of modified multi-walled carbon nanotubes(MWNTs) and poly(lactide-co-glycolide)(PLGA) were prepared by ultrasonic processing.MWNTs/PLGA composite ultrafine fibers were prepared by electrospinning the blend solutions.The surface morphology,thermal properties,mechanical properties of the fibers and the dispersion and orientation of MWNTs were examined by field emission scanning electron microscope(FE-SEM),differential scanning calorimetry(DSC),thermogravimetry analysis(TGA),multi-purpose tensile tester and transmission electron microscopy(TEM).The results show that the fiber diameter decreases and the thermal stability improves significantly with the addition of MWNTs,and when MWNTs mass fraction is 0.5%,the dispersion,orientation and reinforcing effect of MWNTs in fibers are optimum.