Water Exposed Electrospinning of Super Hydrophilic Polylactic Acid/Pluronic Blend Nano-Fibers
Hydrophilicity resulting in an acceptable cell attachment and proliferation. However, the surface enrichment of
Pluronic limits the needed amount of it and endangers the mechanical properties of obtained fibers. In order to surmount this
problem, a new method of electrospinning have been employed using a simultaneous water exposure, attracting Pluronic
hydrophilic segments to the surface of the fibers. Water contact angle test have been done to affirm the hydrophilic behavior
of new fibers. Morphology of these new fibers, in comparison with the routine method have been investigated by scanning
electron microscopy (SEM) and transmission electron microscopy (TEM). The fiber diameter distributions have been plotted
before and after immersion of scaffolds in water. Resulted SEM and TEM images disclosed the fact that fibers prepared by
new electrospinning set up enjoy a higher stability in aquatic environments. In addition, fiber diameter distributions for
routine electrospinning method indicated a change after water immersion, testifying the deficit in mechanical properties of
fibers, which can be improved by the new method.
Keywords - Polylactic acid; Pluronic; Blend Electrospinning; Surface Enrichment; Water Exposure.