Effect of Voltage and Flow Rate Electrospinning Parameters on Polyacrylonitrile Electrospun Fibers

Bakar, Sharifah Shahnaz Syed; Fong, K. C.; Eleyas, A; Nazeri, Muhammad Firdaus Mohd

doi:10.1088/1757-899x/318/1/012076

Cited by 49 publications

(37 citation statements)

References 8 publications

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“…Also they reported that fibers produced at (0.2 ml/hr and 0.25 ml/hr) have cylindrical shape and uniform morphology but at higher values (0.26 ml/hr and 0.3 ml/hr) fibers morphology became rougher [69]. Zong et al studied effect of flow rate on morphology of poly(D,L-lactic acid) (PDLA) at conditions (concentration =25 % with 1 % w/w KH2PO4, voltage =20 KV and needle to collector distance = 15 cm ) found that at lower flow rate smaller fibers produced and with increasing flow rate the average diameter of beads increased (70).Bakar et al studied effect of flow rates on morphology of electrospunpolyacrylonitrile (PAN) 10% solutions dissolved in N-Dimethylformamide (DMF) at conditions (voltage = 20KV, needle to collector distance = 10 cm). They found that at flow rates (10, 15 and 20 µL/min) average diameter of produced fibers was (2.35, 1.50 and 1.40 µm) respectively, and reported with increasing flow rate average diameter decreased [71].…”

Section: Parameters Which Effect On the Morphology Of Nanofibers Prodmentioning

confidence: 99%

“…They found that no fibers produced below concentration 20% w/w and concentration 20% mixture of beads and fibers produced. With increasing concentration beads density decreased and average diameter of produced fibers increased until obtaining uniform structure at concentration 40% w/w [70].Nitanan et al studied effect of different concentrations on morphology of electrospun polystyrene (PS) (10%, 15% and 20% w/v) solutions which dissolved in (DMF) they found that at minimum concentration some beads appeared in the produced fibers but at maximum concentration uniform fibers produced without beads [74]. 3.2.2.…”

Section: Solution Properties Such As Concentration Molecularmentioning

confidence: 99%

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Optimizing the electrospun parameters which affect the preparation of nanofibers

2019

Biointerface Res Appl Chem

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By electrospinning technique, nanofiber can be produced due to applied high potential voltage on polymer solution, leading to the formation of a jet from polymer solution that is collected on a collector in a nanofiber shape. In the last decade of the twentieth century with appearance of nanotechnology, work and publications on optimization of electrospinning and its applications increased exponentially. Morphology of produced nanofiber depends on three groups of parameters: 1- process conditions (applied voltage, flow rate and needle-to-collector distance) 2- solution conditions (concentration, molecular weight and degree of hydrolysis) 3- ambient conditions (temperature and humidity). Brief history from observation of change of the spherical shape of liquid droplet by the effect of the electrical force to conical shape, passing by Formhals patents to use portable electrospinning techniques will be mentioned. Because of various advantages of nanofiber such as high pore density and enormous surface area per volume ratio, there are vital applications based on nanofiber, for example water treatment, air filtration, sensors/biosensors, energy storage, tissue engineering, wound dressing and drug delivery system.

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Section: Parameters Which Effect On the Morphology Of Nanofibers Prodmentioning

confidence: 99%

Section: Solution Properties Such As Concentration Molecularmentioning

confidence: 99%

Optimizing the electrospun parameters which affect the preparation of nanofibers

2019

Biointerface Res Appl Chem

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“…Here, the charged jet will be subjected to whipping and bending instabilities, leading to thinning of the jet and evaporation of the solvent [15][16][17]. However, due to a relatively low production rate (0.01-0.1 mL/min) [18,19] and the need for high voltages, the search for better alternative spinning techniques is necessary.…”

Section: Introductionmentioning

confidence: 99%

Influence of Polymer Concentration and Nozzle Material on Centrifugal Fiber Spinning

et al. 2020

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Centrifugal fiber spinning has recently emerged as a highly promising alternative technique for the production of nonwoven, ultrafine fiber mats. Due to its high production rate, it could provide a more technologically relevant fiber spinning technique than electrospinning. In this contribution, we examine the influence of polymer concentration and nozzle material on the centrifugal spinning process and the fiber morphology. We find that increasing the polymer concentration transforms the process from a beaded-fiber regime to a continuous-fiber regime. Furthermore, we find that not only fiber diameter is strongly concentration-dependent, but also the nozzle material plays a significant role, especially in the continuous-fiber regime. This was evaluated by the use of a polytetrafluoroethylene (PTFE) and an aluminum nozzle. We discuss the influence of polymer concentration on fiber morphology and show that the choice of nozzle material has a significant influence on the fiber diameter.

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“…Studies proved that the secondary surface morphology of electrospun fibers can be changed by regulating the working parameters: (I) solution parameters (e. g. polymer concentration, viscosity, molecular weight, surface tension, conductivity), (II) ambient parameters (temperature and relative humidity (RH)), and (III) processing parameters (applied voltage, flow rate, distance between the tip of the needle and the collector, diameter of the needle, and collector type including rotating collector, rotating frozen mandrel, rotating tube collector with knife‐edge electrodes, parallel electrodes, disk collector, rotating wire collector, patterned electrodes, parallel rings, microfiber assisted rotating collector, and liquid bath collector (Figure ). Furthermore, maneuvering the electrospinning apparatus can also affect the secondary surface morphology of fibers.…”

Section: Basic Principles About the Electrospinning Processmentioning

confidence: 99%

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

2020

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Engineering the secondary surface morphology of fibers (fibers without smooth surface and solid interior) has been attracting significant awareness in various areas and applications. Among different methods of forming nanofibers, electrospinning is the most widely adopted technique due to the ease of forming fibers with a broad range of properties and its unique advantages such as the flexibility to spin into a variety of shapes and sizes as well as adjustable porosity of electrospun structures. In this review paper, more emphasis is put on the secondary surface morphology. A comprehensive overview of the basic principles about the electrospinning process, types of electrospinning, materials, formation mechanisms, characterizations, and applications of electrospun fibers with the secondary surface morphology (e. g. the porous structure, grooved structure, wrinkled structure, rough structure, cactus structure, and hollow structure) are discussed in detail. Importantly, we believe our work can serve as guidelines for the preparations, characterizations, and applications of electrospun fibers with the secondary surface morphology.

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Effect of Voltage and Flow Rate Electrospinning Parameters on Polyacrylonitrile Electrospun Fibers

Cited by 49 publications

References 8 publications

Optimizing the electrospun parameters which affect the preparation of nanofibers

Optimizing the electrospun parameters which affect the preparation of nanofibers

Influence of Polymer Concentration and Nozzle Material on Centrifugal Fiber Spinning

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

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