Back to Search
Start Over
Nano-sized beads and porous fiber constructs of Poly(ℇ-caprolactone) produced by electrospinning.
- Source :
-
Journal of Materials Science . May2004, Vol. 39 Issue 9, p3003-3013. 11p. - Publication Year :
- 2004
-
Abstract
- Nano-sized beads and non-woven porous fiber constructs of poly(ε-caprolactone) were produced by electrospinning. Nearly spherical beads with diameters between 900 nm and 5 ,am were produced with dilute solutions with less than 3 wt% PCL. In this case, the initial jet of solution may split into many mini jets almost at the end of the needle and each minijet gradually disintegrates into small droplets. Beyond a critical solution concentration of about 4 wt% PCL, the jet may undergo extensional flow, splitting and splaying to produce a web of interconnected fibers with mean diameters on the order of 300 to 900 nm. Intermolecular entanglements play a dominant role in stabilizing the fibrous structure. A uniform fibrous structure was obtained at 40 kV while at 20 kV a large fraction of beads were present in the electrospun polymer. The fiber diameter in the PCL deposited on the collector typically exhibits a bimodal distribution. Electrospinning lowers the degree of crystallinity in the polymer. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 39
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 15103334
- Full Text :
- https://doi.org/10.1023/B:JMSC.0000025826.36080.cf