Investigation into the relationships between independent and dependent parameters in roller electrospinning of polyurethane

A roller electrospinning system was used to produce nanofibres by using different solution systems. Although the process of electrospinning has been known for over half a century, knowledge about spinning behaviour is still lacking. In this work, we investigated the effects of salt for two solution systems on spinning performance, fibre diameter, and web structure. Polyurethane (PU) and polyethylene oxide (PEO) were used as polymer, and tetraethylammonium bromide and lithium chloride were used as salt. Both polymer and salt concentrations had a noteworthy influence on the spinning performance, morphology, and diameter of the nanofibres. Results indicated that adding salt increased the spinnability of PU. Salt created complex bonding with dimethylformamide solvent and PU polymer. Salt added to PEO solution decreased the spinning performance of fibres while creating thin nanofibres, as explained by the leaky dielectric model.

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“…The interactions between dimethylformamide (DMF) and TEAB [19] or between PU and salts [15,21] Journal of Nanomaterials…”

Section: Resultsmentioning

confidence: 99%

Influence of Salts on Electrospinning of Aqueous and Nonaqueous Polymer Solutions

Yalçinkaya

Yalcinkaya

Jirsák

2015

Journal of Nanomaterials

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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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“…SP, or polymer throughput, is the amount of nanofiber material in grams per minute produced using a 1-m-long roller (g/min per meter). The equation of spinning performance is given as (41):…”

Section: Methodsmentioning

confidence: 99%

Dextran nanofiber production by needleless electrospinning process

Cengiz-Çallıoğlu

2014

E-Polymers

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This article presents the formation of a dextran nanofibrous layer by needleless electrospinning. Optimum process parameters such as polymer solution and addition (surfactant) concentration, voltage, distance, etc. were determined to obtain uniform and smooth dextran nanofibers. It was not possible to produce nanofibers from pure dextran/water solution. Instead, solution drops were deposited on the collector; therefore, anionic surfactant was added in various concentrations to start the nanofiber production. Also, the effects of surfactant concentration on the solution properties, spinnability and fiber properties were determined. Generally, uniform and fine nanofibers were obtained from the rod electrospinning method. The value of 2 wt% surfactant concentration was chosen as the optimum concentration to produce a dextran nanofibrous layer by roller electrospinning. According to the results, spinning performance was 0.6726 g/min per meter, average fiber diameter was 162 nm, diameter uniformity coefficient was 1.03 and the nonfibrous area was 0.5%. In conclusion, this methodology resulted in the production of good product properties such as good spinnability, fine and uniform nanofibers and high fiber density.

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Investigation into the relationships between independent and dependent parameters in roller electrospinning of polyurethane

Cited by 30 publications

References 27 publications

Influence of Salts on Electrospinning of Aqueous and Nonaqueous Polymer Solutions

Influence of Salts on Electrospinning of Aqueous and Nonaqueous Polymer Solutions

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

Dextran nanofiber production by needleless electrospinning process

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