Preparation and characterization of polyvinylidene fluoride nanofibrous membranes by forcespinning™

Vazquez, B.; Vasquez, Horacio; Lozano, Karen

doi:10.1002/pen.23169

Cited by 83 publications

(63 citation statements)

References 11 publications

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“…Several studies have demonstrated successful fabrication of micro/nanofibers through centrifugal spinning from solutions of various polymers, including PEO, 48,51,52,61 PLA, 46,48 PS, 62 polyacrylic acid (PAA), 48 PVDF, 45 PMMA, 63 and polycaprolactone (PCL). 44 Figure 9a shows an SEM image of nanofibers prepared from an aqueous solution of 5 wt.% PEO by using a rotating speed of 12,000 rpm.…”

Section: Polymer Nanofibersmentioning

confidence: 99%

“…Since 2010, there have been more academic researchers reporting their work on the centrifugal spinning of nanofibers, with a total of around 20 journal articles so far. [43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59] Figure 6a shows a basic bench-top centrifugal spinning setup for the production of polymer nanofibers. During fiber formation, a spinning fluid is placed in a rotating spinning head, which is perforated with multiple nozzles around the sidewall.…”

Section: A Brief History Of Centrifugal Spinningmentioning

confidence: 99%

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Centrifugal Spinning: An Alternative Approach to Fabricate Nanofibers at High Speed and Low Cost

2014

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Nanofibers are an important class of material that is useful in a variety of applications, including filtration, tissue engineering, protective clothing, battery separators, energy storage, etc. So far, electrospinning is the most used method for producing nanofibers. However, the wide-spread commercial use of electrospinning is limited mainly due to its low production rate. Most other nanofiber production methods, such as melt-blowing, bicomponent fiber spinning, phase separation, template synthesis, and self-assembly, are complex and can only be used to make nanofibers from limited types of polymers. Centrifugal spinning is an alternative method for producing nanofibers from various materials at high speed and low cost. In centrifugal spinning, the spinning fluid is placed in a rotating spinning head. When the rotating speed reaches a critical value, the centrifugal force overcomes the surface tension of the spinning fluid to eject a liquid jet from the nozzle tip of the spinning head. The jet then undergoes a stretching process and is eventually deposited on the collector, forming solidified nanofibers. Centrifugal spinning is simple and enables the rapid fabrication of nanofibers for various applications. This article gives an overview on the centrifugal spinning process, and compares it with conventional nanofiber production methods.

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Section: Polymer Nanofibersmentioning

confidence: 99%

Section: A Brief History Of Centrifugal Spinningmentioning

confidence: 99%

Centrifugal Spinning: An Alternative Approach to Fabricate Nanofibers at High Speed and Low Cost

2014

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“…reported a decrease in fiber diameter at low concentrations of polyacrylonitrile when exposed to high angular speed. Conversely, Vasquez and coworkers studied the effect of angular speed and concentration of poly(vinyl difluoride) on fiber morphology obtained by FS, and reported that the diameter was not significantly altered when changing angular speed from 4000 to 8000 rpm, for polymer concentrations of 18 and 21.5 wt %, respectively. Recently, Gundogdu et al .…”

Section: Introductionmentioning

confidence: 99%

Forcespinning technique for the production of poly(d,l‐lactic acid) submicrometer fibers: Process–morphology–properties relationship

Padilla

Morales

Rodríguez-Tobías

et al. 2019

J of Applied Polymer Sci

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This work addresses a systematic study for the process development and optimization of poly(d,l‐lactic acid) (PDLLA) submicrometer fibers utilizing the centrifugal spinning technique known as Forcespinning. This study analyzes the effect of polymer concentration (8, 10, and 12 wt %) and angular speed on the fiber morphology, diameter distribution, and fiber yield. The increase in polymer concentration and angular speed favored the formation of continuous and homogeneous submicrometer fibers with an absence of bead formation and higher output. The optimal conditions were established considering the morphological characteristics that exhibit a greater surface area (homogeneous and submicrometer fibers); and they were achieved at a polymer concentration of 10 wt % at an angular speed ranging from 8000 to 10 000 rpm. Optimization of PDLLA submicrometer fiber fabrication lays the groundwork for scaling up the process and serves as a platform to further develop promising applications of PDLLA nonwoven mats, particularly in the biomedical area such as in scaffolds for tissue engineering. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47643.

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“…There exist a few scholarly articles that experimentally study nanofibre fabrication by various centrifugal spinning methods, essentially to evaluate the effects of the process parameters such as fibre temperature (Sedaghat, Taheri-Nassaj & Naghizadeh 2006;Wang et al 2011), polymer concentration (Lu et al 2013;Ren et al 2013) as well as rotational speed and orifice size (Weitz et al 2008;Badrossamay et al 2010;Vazquez, Vasquez & Lozano 2012;Mary et al 2013). In a detailed study using high-speed photography, Padron et al (2013) explored the effects of several controllable parameters on fibre trajectory and final fibre radius, finding for example that both increasing spinneret angular velocity and decreasing polymer concentration result in thinner fibres.…”

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confidence: 99%

Regularized string model for nanofibre formation in centrifugal spinning methods

et al. 2017

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We develop a general regularized thin-fibre (string) model to predict the properties of non-Newtonian fluid fibres generated by centrifugal spinning. In this process the fibre emerges from a nozzle of a spinneret that rotates rapidly around its axis of symmetry, in the presence of centrifugal, Coriolis, inertial, viscous/shear-thinning, surface tension and gravitational forces. We analyse the effects of five important dimensionless groups, namely, the Rossby number (Rb), the Reynolds number (Re), the Weber number (We), the Froude number (Fr) and a power-law index (m), on the steady state trajectory and thinning of fibre radius. In particular, we find that the gravitational force mainly affects the fibre vertical angle at small arc lengths as well as the fibre trajectory. We show that for small Rb, which is the regime of nanofibre formation in centrifugal spinning methods, rapid thinning of the fibre radius occurs over small arc lengths, which becomes more pronounced as Re increases or m decreases. At larger arc lengths, a relatively large We results in a spiral trajectory regime, where the fibre eventually recovers a corresponding inviscid limit with a slow thinning of the fibre radius as a function of the arc length. Viscous forces do not prevent the fibre from approaching the inviscid limit, but very strong surface tension forces may do so as they could even result in a circular trajectory with an almost constant fibre radius. We divide the spiral and circular trajectories into zones of no thinning, intense thinning and slow or ceased thinning, and for each zone we provide simple expressions for the fibre radius as a function of the arc length.

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Preparation and characterization of polyvinylidene fluoride nanofibrous membranes by forcespinning™

Cited by 83 publications

References 11 publications

Centrifugal Spinning: An Alternative Approach to Fabricate Nanofibers at High Speed and Low Cost

Centrifugal Spinning: An Alternative Approach to Fabricate Nanofibers at High Speed and Low Cost

Forcespinning technique for the production of poly(d,l‐lactic acid) submicrometer fibers: Process–morphology–properties relationship

Regularized string model for nanofibre formation in centrifugal spinning methods

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