Three-jet electrospinning using a flat spinneret

Zhou, Fenglei; Gong, R.H.; Porat, I.

doi:10.1007/s10853-009-3768-1

Cited by 58 publications

(39 citation statements)

References 28 publications

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“…In recent years, needleless electrospinning has been developed, and has a higher spinning efficiency than multi-needle electrospinning [8][9][10][11][12]. Needleless electrospinning does not clog and thus has potential for a greater yield [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Biomedical Applications of Antibacterial Nanofiber Mats Made of Electrospinning with Wire Electrodes

2016

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Twisted stainless steel wires are used as wire electrodes for electrospinning the polyvinyl alcohol (PVA)/zinc citrate nanofiber mats. The morphology and diameter of the nanofibers in PVA/zinc citrate nanofiber mats are evaluated. We measured the antibacterial efficacy against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) of the nanofiber mats. We also examined the cell adhesion affinity of mammalian tissue culture cells on these nanofiber mats. Our results indicate that an increase in zinc citrate increases the viscosity and electrical conductivity of PVA solution. In addition, increasing zinc citrate results in a smaller diameter of nanofibers that reaches below 100 nm. According to the antibacterial test results, increasing zinc citrate enlarges the inhibition zone of S. aureus but only has a bacteriostatic effect against E. coli. Finally, cell adhesion test results indicate that all nanofiber mats have satisfactory cell attachment regardless of the content of zinc citrate.

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Section: Introductionmentioning

confidence: 99%

Biomedical Applications of Antibacterial Nanofiber Mats Made of Electrospinning with Wire Electrodes

2016

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“…A typical production rate from a single spinneret is 0.1 -1 g of fiber per hour, depending on the solution properties and operating parameters; in general, the smallest fibers are fabricated by reducing the solids content of the spin dope or by reducing the flow rate to the spinneret, both of which lead to lower productivity [1]. Several attempts have been made to use an array of spinnerets to increase productivity [2,3]. These studies are typically characterized by careful attention to the spacing and geometric arrangement of the spinnerets and/or the use of auxiliary electrodes to modify the inter-jet electrical field interactions.…”

Section: Introductionmentioning

confidence: 99%

Free surface electrospinning from a wire electrode

Forward

Rutledge

2012

Chemical Engineering Journal

145

110

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Electrostatic jetting from a free liquid surface offers an alternative to conventional electrospinning in which jets are emitted from spinnerets. In this work we analyze a system in which a wire electrode is swept (in a rotary motion) through a bath containing a polymeric solution in contact with a high voltage, resulting in entrainment of the fluid, the formation of liquid droplets on the wire and electrostatic jetting from each liquid droplet. Solutions of polyvinylpyrrolidone in ethanol were used as test systems to evaluate each stage of the process.The volume of individual droplets on the wire were measured by photographic methods and correlated with the viscosity, density and surface tension of the liquid, and with system parameters such as electrode rotation rate and wire diameter. The local electric field in the absence of liquid entrainment was modeled using conventional electrostatics, and jet initiation was found to occur consistently at the angular position where the electric field exceeds a critical value of 34 kV/cm, regardless of rotation rate. Two operating regimes were identified. The first is an entrainment-limited regime, in which all of the entrained liquid is jetted from the wire electrode. The second regime is field-limited, in which the residence time of the wire electrode in an electric field in excess of the critical value is too short to deplete the fluid on the wire. The productivity of the system was measured and compared to the theoretical values of liquid entrainment. As expected, highest productivity occurred at high applied potentials and high rotation rates.

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“…Needleless electro spinning could solve the above problems and make industrialization possible. The main techniques for needleless electro spinning currently are tip electro spinning of the liquid surface [8][9][10][11][12][13][14], conical wire coil spinnerets [15], multi-hole/porous spinnerets [16][17][18] and rotary cylinder/cone/ disk spinnerets [19,20]. Designed a perforated pipe needleless electrostatic spinning apparatus [21].…”

Section: Introductionmentioning

confidence: 99%

Needleless Electrospun PVA/Chitosan Nano Fiber Membrane and its Antibacterial Property

Pan¹

2017

JTEFT

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Poly vinyl alcohol (PVA), which is a low-volatility, environmentally friendly and water-soluble polymer, is suitable for needleless electro spinning. Chitosan (CS) has drawn much attention due to its excellent antibacterial properties; however, it is hard to needle lessly electro spin CS alone. Thus, a certain amount of CS was added into the electro spinning solution to fabricate PVA nano fibers with antibacterial properties. In this paper, a needleless electro spinning device with spiral disk spinnerets was used to prepare PVA with different concentrations of CS nano fiber membranes. The effects of electro spinning parameters on process stability and anti-water-soluble processing were investigated. The results showed that the electro spinning process was associated with voltage, rotation speed and collection distance. The optimal electro spinning parameters are a voltage of 75 kV, a rotation speed of 11 rpm and a distance of 190 mm. From the comparison and analysis, 5% glutaraldehyde (GA) solution treatment is the superior method to increase the anti-water-solubility of the membrane. The antibacterial properties of PVA/CS nano fiber membranes with CS concentrations ranging from 1.0% to 1.5% were also investigated. The results showed that the inhibition rates of Escherichia coli (E. coli) were all above 99%, and those of Staphylococcus aureus (S. aureus) were all above 90%. Moreover, GA solution treatment has no effect on the antibacterial performance.

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Three-jet electrospinning using a flat spinneret

Cited by 58 publications

References 28 publications

Biomedical Applications of Antibacterial Nanofiber Mats Made of Electrospinning with Wire Electrodes

Biomedical Applications of Antibacterial Nanofiber Mats Made of Electrospinning with Wire Electrodes

Free surface electrospinning from a wire electrode

Needleless Electrospun PVA/Chitosan Nano Fiber Membrane and its Antibacterial Property

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