Research Article
Using Dimensionless Numbers to Predict Centrifugal Jet-Spun Nanofiber Morphology
Table 1
Composition and dimensionless parameter values for all PCL solutions and fibers obtained from the small-scale CJS prototype.
| PCL conc. (/) % | Rotational speed (rpm) | Dynamic (shear) viscosity
(Pa·s) | Surface tension
(N·m-1) | Density
(kg·m-3) | Jet speed
(m·s-1) | Weber number
| Reynolds number
| Capillary number
| Fiber feature from SEM images |
| 4 | 10,000 | | | | 13.61 | 413.43 | 33.70 | 12.27 | Fiber+beads | 15,000 | 0.1488 | 0.0165 | 1450 | 20.42 | 930.22 | 50.55 | 18.40 | Fiber+beads | 20,000 | | | | 27.23 | 1653.72 | 67.40 | 24.54 | Fiber+beads | 25,000 | | | | 34.03 | 2583.93 | 84.25 | 30.67 | Fiber+beads |
| 5 | 10,000 | | | | 13.61 | 392.06 | 24.06 | 16.30 | Fiber+beads | 15,000 | 0.2099 | 0.0175 | 1460 | 20.42 | 882.13 | 36.09 | 24.45 | Fiber+beads | 20,000 | | | | 27.23 | 1568.23 | 48.11 | 32.60 | Fiber+beads | 25,000 | | | | 34.03 | 2450.36 | 60.14 | 40.74 | Fiber+beads |
| 6 | 10,000 | | | | 13.61 | 376.79 | 18.50 | 20.37 | Fiber+few beads | 15,000 | 0.2766 | 0.0185 | 1480 | 20.42 | 847.79 | 27.75 | 30.55 | Fiber+few beads | 20,000 | | | | 27.23 | 1507.18 | 37.00 | 40.73 | Fiber+few beads | 25,000 | | | | 34.03 | 2354.97 | 46.26 | 50.91 | Fiber+few beads |
| 7 | 10,000 | | | | 13.61 | 371.77 | 13.12 | 28.35 | Fiber | 15,000 | 0.3981 | 0.0191 | 1510 | 20.42 | 836.47 | 19.67 | 42.52 | Fiber | 20,000 | | | | 27.23 | 1487.06 | 26.23 | 56.69 | Fiber | 25,000 | | | | 34.03 | 2323.53 | 32.79 | 70.86 | Fiber |
| 8 | 10,000 | | | | 13.61 | 359.06 | 6.58 | 54.53 | Fiber | 15,000 | 0.8087 | 0.0202 | 1540 | 20.42 | 807.88 | 9.88 | 81.80 | Fiber | 20,000 | | | | 27.23 | 1436.23 | 13.17 | 109.06 | Fiber | 25,000 | | | | 34.03 | 2244.11 | 16.46 | 136.33 | Fiber |
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