Electrospinning of composite microbeads for tribological improvements

Wong, Danny; Resendiz, Jesus; Egberts, Philip; Park, Simon S.

doi:10.1016/j.jmapro.2018.06.013

Cited by 3 publications

(1 citation statement)

References 36 publications

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“…The main part of the scaffolds (samples 6-27) demonstrated continuous, smooth, primarily isotropic fibers assembled in a dense looped pattern (Figures 2-6). However, when using a smaller diameter nozzle (27 G), the structures become 9.42-16.7-µm spherical droplets, often called "nanobeads" or "microbeads" in literature [33,34] (Figure 1, № 4, 5).…”

Section: Resultsmentioning

confidence: 99%

Effects of Electrospinning Parameter Adjustment on the Mechanical Behavior of Poly-ε-caprolactone Vascular Scaffolds

et al. 2022

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Electrospinning is a perspective method widely suggested for use in bioengineering applications, but the variability in currently available data and equipment necessitates additional research to ascertain the desirable methodology. In this study, we aimed to describe the effects of electrospinning technique alterations on the structural and mechanical properties of (1,7)-polyoxepan-2-one (poly-ε-caprolactone, PCL) scaffolds, such as circumferential and longitudinal stress/strain curves, in comparison with corresponding properties of fresh rat aorta samples. Scaffolds manufactured under different electrospinning modes were analyzed and evaluated using scanning electronic microscopy as well as uniaxial longitudinal and circumferential tensile tests. Fiber diameter was shown to be the most crucial characteristic of the scaffold, correlating with its mechanical properties.

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Section: Resultsmentioning

confidence: 99%

Effects of Electrospinning Parameter Adjustment on the Mechanical Behavior of Poly-ε-caprolactone Vascular Scaffolds

et al. 2022

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Study on the formation and structural evolution of bead‐on‐string in electrospun polysulfone mats

Rasouli

Pirsalami

Zebarjad

2020

Polymer International

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Bead‐on‐string is a desirable morphology for some emerging applications of electrospun mats such as superhydrophobic surfaces. In this study, the bead‐on‐string morphology in electrospun polysulfone (PSU) mats was investigated and correlated with the solution concentration, voltage and feed rate. PSU/dimethylformamide solutions with different concentrations (4, 5.5, 7, 15, 18 and 20 wt% PSU) were electrospun at a constant feed rate (3.5 mL h–1) and voltage (15 kV). Critical chain overlap and entanglement concentrations were found to be 3.65 and 7.12 wt% PSU, respectively. The bead‐on‐string morphology was detected in the concentration range 7–18 wt% PSU, in close agreement with theoretical estimations. The evolution of the bead‐on‐string morphology in mats prepared from 15 wt% PSU solution and electrospun at three feed rates (i.e. 1.5, 2.5 and 3.5 mL h–1) and voltages (i.e. 12.5, 15 and 18 kV) were also studied. The results showed that the beads appear less in number as either the feed rate or the voltage increases. In addition, the morphology of the beads revealed a transition from a spherical to a spindle‐like appearance with an increase in voltage. The effect of feed rate on bead geometry, however, was revealed to depend on the applied voltage. © 2020 Society of Chemical Industry

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Simulation and experimental study of nanofiber yarns prepared by disc electrospinning

Hao,

Zhang,

et al. 2024

Textile Research Journal

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Conjugated electrospinning is an exciting way to prepare nanoyarns. However, all currently reported preparations of nanofiber yarns by conjugated electrospinning use needles, which can cause discontinuous yarn production due to plugging needles during the preparation process. Herein, a novel disc treated with rounded corners as the spinneret of conjugated electrospinning was developed to spin continuously twisted nanofiber yarn to overcome the existing problems. First, finite element analysis was used to optimize the parameters of the disc. The disc exhibited the optimal field strength distribution on the spinning surface when the disc rounding angle was 0.7, and the coefficient of variation value of the field strength was only 12.6%. After that, we optimized the effect of spinning parameters on yarn yield by central composite design. In addition, the impact of spinning parameters on fiber morphology was also investigated. Under the optimized parameters, it is possible to spin continuously at a 360 m/h speed for at least 1 h without breaking. This innovative approach provides a novel idea for continuously producing nanofiber yarns.

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Electrospinning of composite microbeads for tribological improvements

Cited by 3 publications

References 36 publications

Effects of Electrospinning Parameter Adjustment on the Mechanical Behavior of Poly-ε-caprolactone Vascular Scaffolds

Effects of Electrospinning Parameter Adjustment on the Mechanical Behavior of Poly-ε-caprolactone Vascular Scaffolds

Study on the formation and structural evolution of bead‐on‐string in electrospun polysulfone mats

Simulation and experimental study of nanofiber yarns prepared by disc electrospinning

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