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Fibers 2016, 4(2), 20; doi:10.3390/fib4020020

Effect of Polymer Concentration, Rotational Speed, and Solvent Mixture on Fiber Formation Using Forcespinning®

1
Chemistry Department, The University of Texas Rio Grande Valley, Edinburg, TX 78539, USA
2
Mechanical Engineering Department, The University of Texas Rio Grande Valley, Edinburg, TX 78539, USA
*
Authors to whom correspondence should be addressed.
Academic Editor: Richard Kotek
Received: 3 December 2015 / Accepted: 21 May 2016 / Published: 7 June 2016
(This article belongs to the Special Issue Fiber Forming Polymers)
View Full-Text   |   Download PDF [4516 KB, uploaded 7 June 2016]   |  

Abstract

Polycaprolactone (PCL) fibers were produced using Forcespinning® (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. View Full-Text
Keywords: fibers; centrifugal spinning; biopolymers; crystallization; DSC; electron microscopy fibers; centrifugal spinning; biopolymers; crystallization; DSC; electron microscopy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Obregon, N.; Agubra, V.; Pokhrel, M.; Campos, H.; Flores, D.; De la Garza, D.; Mao, Y.; Macossay, J.; Alcoutlabi, M. Effect of Polymer Concentration, Rotational Speed, and Solvent Mixture on Fiber Formation Using Forcespinning®. Fibers 2016, 4, 20.

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