Magnetospinning of Nano‐ and Microfibers

Tokarev, Alexander; Trotsenko, Oleksandr; Griffiths, Ian M.; Stone, Howard A.; Minko, Sergiy

doi:10.1002/adma.201500374

Cited by 37 publications

(26 citation statements)

References 35 publications

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“…Nanofibers can be prepared from polymers using different processing methods including electrospinning [13], melt blowing [14], centrifugal spinning, Forcespinning ® (FS) [15], liquid shearing spinning [16], touch and brush spinning [17], and most recently the reactive magnetospinning method [18,19]. The melt blowing process has been mainly developed to fabricate polyolefin fibers with a high throughput and fiber diameters ranging between several microns down to hundreds of nanometers.…”

Section: Introductionmentioning

confidence: 99%

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

Obregon

Agubra

Pokhrel

et al. 2016

Fibers

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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.

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Section: Introductionmentioning

confidence: 99%

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

Obregon

Agubra

Pokhrel

et al. 2016

Fibers

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“…We previously showed that the diameter of the fiber can be controlled by the concentration of polymer and by the speed of rotation of the magnet. [6] Since the magnetic fluid and polymer solution are immiscible,t he magnetic liquid is also recyclable.…”

Section: Methodsmentioning

confidence: 99%

“…[6] This technique utilizes as etup in which am agnet is glued to ar otating stage . A polymer solution is mixed with magnetic nanoparticles and pushed through aneedle facing the magnet.…”

Section: Therehasbeenacontinuousincreaseintheuseofnanofibersmentioning

confidence: 99%

Reactive Magnetospinning of Nano‐ and Microfibers

et al. 2015

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Reactive spinning of nano-and microfibers that involves very fast chemical reactions and ion exchange is achallenge for the common methods for nanofiber formation. Herein, we introduce the reactive magnetospinning method. This procedure is based on the magnetic-field-directed collision of ferrofluid droplets with liquid droplets that contain complementary reactants.T he collision, start of the chemical reaction, and the fiber drawing are self-synchronized. The method is used to synthesize,cross-link, and chemically modify fiber-forming polymers in the stage of fiber formation. The method provides new opportunities for the fabrication of nanofibers for biomedical applications.

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“…An exciting new approach to fabricate magnetic nanofibers was presented recently by Tokerav et al [38 ] who used ferrofluids and combined them with a simple motor and a permanent magnet to spin a magnetic polymer fiber [38 ]. They also demonstrated its potential in biological applications by growing fibroblast cells on a magnetospun scaffold [38 ].…”

Section: Magnetic Field-responsive Fibersmentioning

confidence: 98%