The Preparation And Characterization Of Micro/Nanoscale Bio-Composite Fibers By Electrospinning

In this paper, PLLA, PLLA/Collagen, PLLA/HA and PLLA/Collagen/HA bio-composite nanofibers were prepared by traditional electrospinning. The fiber morphology, the crystallization behavior, the thermal and mechanical properties and the hydrophilicity were characterized by SEM, FT-IR, uniaxial tensile test, DSC, XRD and water contact angle measurement. The results showed that the composite fiber mats had relatively ideal fiber morphology and scaffold. The average diameters were about 400~700nm. With the addition of collagen and HA, the amount of which was small, the mechanical property of the composite fibers have been enhanced, while the thermal property and the hydrophilicity has not been changed obviously.Recently, the micro/nanoscale fibers with special morphologies have attracted increasing attention. In this paper, a series of bicomponent fiber materials separately based on TPEE and PLLA have been prepared by a novel double-electrode electrospinning. Other components coupled with TPEE or PLLA include PVP, PCL, PEG and so on, most of which are biomaterials and hydrophilic materials. SEM images showed that the polymer materials and their solvents have great influence with the morphology of the bicomponent fibers, which was probably due to the different shrinkage of the polymers and the nature of the solvents. Double-electrode electrospinning can be used to prepare bicomponent fibers of large numbers of polymers. It provides a new way to produce fibers with special morphologies and has great application prospects.