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Structural Features and Mechanical Properties of in Situ –Bonded Meshes of Segmented Polyurethane Electrospun from Mixed Solvents by Satoru Kidoaki; Il Keun Kwon; Takehisa Matsuda is a Medicine article available to read on EtoBox.

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## Abstract The relationships between the structural features and mechanical properties of electrospun segmented polyurethane (SPU) meshes and electrospinning parameters such as formulation (e.g., polymer concentration and solvent mixing ratio) and operation parameters (e.g., applied voltage, air gap, and flow rate) were studied with the use of a mixed‐solvent system of tetrahydrofuran (THF) and __N,N‐__dimethylacrylamide (DMF). After the relationships between the structure of electrospun SPU and the operation parameters under a fixed SPU concentration of single THF solution were established, SPU was electrospun from the mixed solvent of THF and DMF with different mixing ratios [DMF content: 5, 10, and 30% (v/v)]. Scanning electron microscopy showed that an increase in DMF ratio significantly enhances the degree of bonding between SPU fibers at contact sites and decreases the diameter of fibers formed. The porosimetric characterization showed the following: (1) The porosity of the electrospun SPU meshes decreased with an increase of DMF ratio. (2) The pore size distribution exhibited three representative peaks of different void sizes (i.e., approximately 5, 20, and 70 μm). (3) The

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Author

Satoru Kidoaki; Il Keun Kwon; Takehisa Matsuda

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1552-4973)

Published

2005

Language

EN

Field

Medicine (Health Sciences)