Journal
FIBERS
Volume 4, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/fib4020020
Keywords
fibers; centrifugal spinning; biopolymers; crystallization; DSC; electron microscopy
Categories
Funding
- NSF PREM [DMR-1523577]
- USDA
- National Institute of Food and Agriculture
- Integrating Food Science/Engineering and Education Network (IFSEEN) [2015-38422-24059]
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Polycaprolactone (PCL) fibers were produced using Forcespinning((R)) (FS). The effects of PCL concentration, solvent mixture, and the spinneret rotational speed on fiber formation were evaluated. The concentration of the polymer in the solvents was a critical determinant of the solution viscosity. Lower PCL concentrations resulted in low solution viscosities with a correspondingly low fiber production rate with many beads. Bead-free fibers with high production rate and uniform fiber diameter distribution were obtained from the optimum PCL concentration (i.e., 12.5 wt%) with tetrahydrofuran (THF) as the solvent. The addition of N, N-dimethylformamide (DMF) to the THF solvent promoted the gradual formation of beads, split fibers, and generally affected the distribution of fiber diameters. The crystallinity of PCL fibers was also affected by the processing conditions, spinning speed, and solvent mixture.
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