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Title: Formation of Poly (Vinylidene Fluoride) Nanofibers Part Ii: The Elaboration of Incompatibility in the Electrospinning of Its Solutions
Journal: Journal of Nanostructures
Author: 1,2. Ahmad Akbari, 2. Arash Yunessnia lehi
Year: 2012
Address: 1. Department of Carpet, Faculty of Architecture & Art, University of Kashan, Kashan, Iran 2. Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran
Abstract: Poly(vinylidene fluoride) (PVDF) fibers with two molecular weights were prepared via electrospinning process. In this process, the concentration of spinning depended drastically on the gelation process. Also, it was experimentally smaller than obtained concentration in the solution entanglement number approach (SENA). Proof of this incompatibility was explained by the properties of PVDF and its solutions with DMF (i.e. PVDF crystallization, microgel formation and spinodal decomposition). These factors caused to early stabilize liquid jet. Also, early gelation inhibited from the fiber formation by blockage of syringe needle with Mw = 180,000 g/mol and early spinodal decomposition helps to fiber formation by isolated droplets of polymer-rich phase with Mw=275,000 g/mol. Finally, a mechanism was proposed for the electrospinning of these solutions.
Keywords: Crystallization Electrospinning Process Microgels Poly(vinylidene fluoride) Solution Entanglement Number Spinodal Decomposition
Application: Optimizing Electrospinning Parameters
Product Model 1: Electroris
Product Model 2:
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