| Structural features and mechanical properties of medical grade polyurethane electrospun from mixed solvents |
| Paper ID : 1452-UFGNSM-FULL |
| Authors: |
|
Najmeh Moazeni *1, Mehdi Sadrjahani2, Masoud Latifi3 1tehra, Amirkabir university of technology 2Textile Engineering Department, Textile Research and Excellence Centers, Amirkabir University of Technology, Tehran, Iran 3Textile Engineering Department, Textile Research and Excellence, Centers, Amirkabir University of Technology, Tehran, Iran. |
| Abstract: |
| Polymer-fiber-based meshes, matrices, or scaffolds have been applied in various engineering fields such as textile and biomedical engineering. The control of the structural features (e.g., fiber diameter, porosity, surface to- volume ratio, surface roughness) and mechanical properties (e.g., elasticity, mechanical durability) of fiber-based matrices and scaffolds is an essential issue in engineering applications. Therefore, in this study we focused on morphology analyses of electrospun fibers from a medical grade polymer of polyurethane (Tecoflex EG 72D), a family of hydrophilic polyether-based thermoplastic aliphatic polyurethanes (PU), and mechanical properties of collected nanofibers at different structures. The result showed that a minimum concentration (10%w/v) for polymer solution with volume ratios of 70:30 (DMF: THF) was required to yield fibers without beads with average diameter less than 200nm. The stress–strain study of electrospun nanofibers at different drawing angles showed the isotropic and anisotropic behaviours for random and aligned thermoplastic polyurethane nanofibers, respectively. The maximum stress and strain were obtained for aligned nanofibers when the deposited direction of nanofibers was the same of drawing direction. |
| Keywords: |
| electrospinning; polyurethane; mixed solvent |
| Status : Paper Accepted (Poster Presentation) |
