Analysis of the Effects of Solution Conductivity on Electrospinning Process and Fiber Morphology

Angammana, Chitral J.; Jayaram, S.

doi:10.1109/tia.2011.2127431

Cited by 252 publications

(165 citation statements)

References 24 publications

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“…The addition of a cationic surfactant will increase the charge density, leading to a higher conductivity. If the conductivity level is too high, multijets will be produced and lead to fibres with beads [1,21]. It was previously shown that without DTAB addition, 8 wt/v% results in a bimodal distribution in fibres resulting in distinct fibres diameter due to secondary jets.…”

Section: Resultsmentioning

confidence: 99%

Optimisation of electrospinning parameter for Poly(L-lactic) acid (PLLA) electrospun nanofiber

et al. 2016

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Abstract. Poly (L-lactic) Acid (PLLA) ia one of the biodegradable polymer that normally used in the biomedical application. In this work it is shown that electrospinning of PLLA electrospun fibre was affected by electrospinning processing parameters such as the solvent systems selection, polymer solution concentration, flow rate and acceleratingvoltage. Optimisation of these parameters is necessary to obtain a beadless and submicron diameter fibre as desired in this research.

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Section: Resultsmentioning

confidence: 99%

Optimisation of electrospinning parameter for Poly(L-lactic) acid (PLLA) electrospun nanofiber

et al. 2016

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“…The lowest voltage in the formation of Taylor cone will decrease with the increasing solution conductivity [53].…”

Section: The Characterization Of Cellulose Solutionmentioning

confidence: 98%

“…Also motive electrostatic power on the surface of fluid increases by external electric field [53]. Different amounts of the lithium chloride were added to 0.63 w/w % cellulosic solutions, and their influences were observed on other solution parameters.…”

Section: The Characterization Of Cellulose Solutionmentioning

confidence: 99%

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A feasibility study on semi industrial nozzleless electrospinning of cellulose nanofiber

et al. 2015

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The current study focuses on the production of cellulose nanofiber through semi-industrial nozzleless electrospinning process. The cellulose biopolymer used for spinning process was extracted from rice straw as renewable, abundant, and inexpensive natural resource. The electrospinning device comprising one needle is extremely inefficient because of low productivity level of about 0.3 g/h. Thus, using the nozzleless electrospinning system guarantees the high productivity of nanofiber web for diverse applications. The successful electrospinning process is accomplished through systematic control of the surface tension, viscosity, and electric conductivity of aqueous solutions of cellulose. Moreover, a design expert software was used for providing experimental plan for the investigation of the influence of the operational conditions on the spinning properties of the selected solution. The polyvinyl alcohol with a weight ratio of 60 % relative to cellulose content was used as a biocompatible polymer to facilitate electrospinning process for producing the aqueous cellulose solution of 0.63 wt%. Based on the scanning electron microscopy images, and various selected parameters, namely, the drum rotation rate of 9 rpm, high voltage range of ±55 kV, the spinning temperature of 41°C, and 10-cm distance between drum and collector an average diameter of 89 ± 1 nm was arrived. The composite nanofibers used for filter production and their performance were evaluated by porosity analysis and permeability tests. Results show the negative impact of the weak mechanical strength as an obstacle in Penetration test. (It promotes by higher electrospinning time and reaching proper stiffness in web layer.) The permeability tests show a maximum value of 3.5 cm 3 /cm 2 /s at the maximum pressure of 120 Pa.

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“…Their electrical conductivities can be increased by many orders of magnitude from 10 The morphology of the electrospun fibres is influenced by a variety of factors including solvent properties (dielectric constant, volatility), solution properties (viscosity, surface tension, conductivity, polymer concentration and molecular weight, incorporation of additives such as salts or surfactants), environmental conditions (temperature, humidity) and process parameters (applied voltage, flow rate, needle tip to collector distance, needle diameter, type and size of collector). Humidity has been acknowledged as one of the environmental parameters, but is not always taken into account in the electrospinning models as a significant parameter affecting the process On the contrary, it seems to be categorized as a minor parameter affecting the final jet diameter [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Conductive PANI fibers and determining factors for the electrospinning window

Moutsatsou

Coopman

Smith

et al. 2015

Polymer

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Polyaniline doped with CSA / PEO conductive nanofibres were produced by electrospinning. The electrospinning window was determined by using a three level, full factorial experimental design. The combined effects of the humidity, voltage and flow rate on the fibre morphology and diameter were examined demonstrating that the ambient humidity is the critical factor affecting the electrospinning process and determining the electrospinning window for a conductive polymer. Low humidity favors the formation of defect free fibres while high humidity either hinders fibre formation or causes the formation of defects on the fibres either due to jet discharge or due to water absorption and phase separation. High level of doping with CSA led to the formation of crystalline structures. Data fitting was used to explore the behavior of conductive polymers in electrospinning and very good agreement between experimental and theoretical predictions was obtained for only a limited range of experimental conditions, whereas deviation was observed for all other sets of conditions. Keywords: electrospinning process parameters, conductive polymers, polyaniline, humidity IntroductionConductive polymers are organic polymers exhibiting electrical, optical and magnetic properties similar to those of metallic materials but with the characteristic processability and mechanical properties of polymers [1]. Τheir conjugated structure, meaning the alternation between the single and double bonds, favors the molecule's stability, as well as electron mobility and transport of electric charge within and between the polymer chains. Their electrical conductivities can be increased by many orders of magnitude from 10 −10 -10 −5 to 10 2 -10 5 S/cm upon doping, which cover the whole insulator-semiconductor-metal range. Due to this unique nature as well as the reversible doping/dedoping process and their controllable chemical and electrochemical properties, a variety of conductive polymers, especially their 1D nanostructures such as nanotubes and nanowires, have been studied in the field of nanotechnology (nanotubes and nanowires for supercapacitors, gas sensors, energy storage, nanodiodes, actuators) and more recently they have been successfully tested as biosensors and for their ability to promote cell adhesion, regulate and modulate cell differentiation, migration, protein secretion and DNA synthesis [2,3].Compared to other conductive polymers, polyaniline presents significant advantages such as ease of synthesis, low cost of aniline monomer and good stability in environmental conditions [4,5]. As all conductive polymers though, exactly because of its conjugated structure, it is generally insoluble in common organic solvents. Its emeraldine salt though, which is produced by doping the emeraldine base form with a suitable acid, can render the polyaniline soluble in some organic solvents [5]. In terms of electrospinnability, the small molecular weights that it is usually available at, combined with its low solubility in common organic solvents mak...

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Analysis of the Effects of Solution Conductivity on Electrospinning Process and Fiber Morphology

Cited by 252 publications

References 24 publications

Optimisation of electrospinning parameter for Poly(L-lactic) acid (PLLA) electrospun nanofiber

Optimisation of electrospinning parameter for Poly(L-lactic) acid (PLLA) electrospun nanofiber

A feasibility study on semi industrial nozzleless electrospinning of cellulose nanofiber

Conductive PANI fibers and determining factors for the electrospinning window

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