Electrospinning

Wendorff, Joachim H.; Agarwal, Saurabh; Greiner, Andreas

doi:10.1002/9783527647705

Cited by 234 publications

(127 citation statements)

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“…These nanofibers were slightly thinner than the PVA-NF. The slight variations of fiber diameters observed for the nanofiber samples were possibly due to differences in viscosity and conductivity of the solutions [1,2,32]. The viscosity, conductivity and AFD values of PVA, PVA/AITC and PVA/AITC/␤-CD-IC solutions are shown in Table 1.…”

Section: Morphology Analysis Of Nanofibersmentioning

confidence: 97%

“…Electrospinning is a widely used method to produce functional nanofibers from variety of materials including polymers, inorganic materials and composite structures [1,2]. Generally electrospinning is a room temperature process in which the polymer solution is exposed to electrostatic field and the electrified jet is drawn toward to the grounded collector and deposited on the collector as a fibrous web.…”

Section: Introductionmentioning

confidence: 99%

“…Generally electrospinning is a room temperature process in which the polymer solution is exposed to electrostatic field and the electrified jet is drawn toward to the grounded collector and deposited on the collector as a fibrous web. As the solvent evaporates during the process, nanofibrous materials with unique properties having very high surface area to volume ratio and nanoporous structures are produced [1,2]. The unique properties enable electrospun nanofibers to be used in wound dressing, tissue scaffold, drug delivery, food packaging, filtration, energy, catalysis, sensors, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The unique properties enable electrospun nanofibers to be used in wound dressing, tissue scaffold, drug delivery, food packaging, filtration, energy, catalysis, sensors, etc. [1,2]. Owing to the room temperature and ambient process conditions that provide protection for the bioactive compounds in electrospun nanofibers, electrospinning is used for production of functional nanofibers containing active agents like antioxidants [3,4], flavors/fragrances [5,6] and antibacterial agents [7].…”

Section: Introductionmentioning

confidence: 99%

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Release and antibacterial activity of allyl isothiocyanate/β-cyclodextrin complex encapsulated in electrospun nanofibers

Aytaç

Doğan

Tekinay

et al. 2014

Colloids and Surfaces B: Biointerfaces

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a b s t r a c tAllyl isothiocyanate (AITC) is known as an efficient antibacterial agent but it has a very high volatility. Herein, AITC and AITC/␤-cyclodextrin (CD)-inclusion complex (IC) incorporated in polyvinyl alcohol (PVA) nanofibers were produced via electrospinning. SEM images elucidated that incorporation of AITC and AITC/␤-CD-IC into polymer matrix did not affect the bead-free fiber morphology of PVA nanofibers. 1 H-NMR and headspace GC-MS analyses revealed that very low amount of AITC was remained in PVA/AITC-NF because of the rapid evaporation of AITC during the electrospinning process. Nevertheless, much higher amount of AITC was preserved in the PVA/AITC/␤-CD-IC-NF due to the CD inclusion complexation. The sustained release of AITC from nanofibers was evaluated at 30 • C, 50 • C and 75 • C via headspace GC-MS. When compared to PVA/AITC-NF, PVA/AITC/␤-CD-IC-NF has shown higher antibacterial activity against Escherichia coli and Staphylococcus aureus due to the presence of higher amount of AITC in this sample which was preserved by CD-IC.

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Section: Morphology Analysis Of Nanofibersmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Release and antibacterial activity of allyl isothiocyanate/β-cyclodextrin complex encapsulated in electrospun nanofibers

Aytaç

Doğan

Tekinay

et al. 2014

Colloids and Surfaces B: Biointerfaces

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“…ZnO-TiO 2 and TiO 2 -ZnO CSHJs were fabricated via a three-step process where electrospinning was followed by atomic layer deposition (ALD) and calcination. In the rst step, we prepared precursors via electrospinning [31][32][33][34] for the cores of the CSHJ nanobers, where the precursors were mixtures of PVP and ZnAc or TTIP. In the second step, these nanobers were used as substrates and TiO 2 or ZnO shell was grown through ALD.…”

Section: Photocatalytic Activity Of Core-shell Heterojunction Nanobersmentioning

confidence: 99%

Selective isolation of the electron or hole in photocatalysis: ZnO–TiO2 and TiO2–ZnO core–shell structured heterojunction nanofibers via electrospinning and atomic layer deposition

et al. 2014

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Heterojunctions are a well-studied material combination in photocatalysis studies, the majority of which aim to improve the efficacy of the catalysts. Developing novel catalysts begs the question of which photo-generated charge carrier is more efficient in the process of catalysis and the associated mechanism. To address this issue we have fabricated core-shell heterojunction (CSHJ) nanofibers from ZnO and TiO 2 in two combinations where only the 'shell' part of the heterojunction is exposed to the environment to participate in the photocatalysis. Core and shell structures were fabricated via electrospinning and atomic layer deposition, respectively which were then subjected to calcination. These CSHJs were characterized and studied for photocatalytic activity (PCA). These two combinations expose electrons or holes selectively to the environment. Under suitable illumination of the ZnO-TiO 2 CSHJ, e/h pairs are created mainly in TiO 2 and the electrons take part in catalysis (i.e. reduce the organic dye) at the conduction band or oxygen vacancy sites of the 'shell', while holes migrate to the core of the structure. Conversely, holes take part in catalysis and electrons diffuse to the core in the case of a TiO 2 -ZnO CSHJ. The results further revealed that the TiO 2 -ZnO CSHJ shows $1.6 times faster PCA when compared to the ZnO-TiO 2 CSHJ because of efficient hole capture by oxygen vacancies, and the lower mobility of holes.

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Electrospinning

Agarwal

Greiner

Wendorff

2014

Kirk-Othmer Encyclopedia of Chemical Technology

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Electrospinning allows the production of nanofibers with diameters down to the range of a few nanometers. Self‐assembly processes driven by the coulomb interactions between charged elements of the fluids to be spun and their interactions with the external electrical field control nanofiber formation. Electrospinning involves thus a sequence of complex physical instability processes such as bending instabilities and axisymmetric instabilities. These processes induce extremely high extensional deformations and strain rates during fiber formation. Electrospinning is used predominantly to produce fibers from natural and synthetic polymers, and it has recently been exploited toward the production of metal, ceramic, and glass nanofibers employing precursor routes. The nanofibers can be functionalized during electrospinning by the incorporation of pores and fractal surfaces, and by introducing functional elements such as catalysts, quantum dots, drugs, enzymes, or even bacteria. The production of individual fibers, random nonwovens, or orientationally highly ordered nonwovens has been demonstrated based on appropriate selections of electrode configurations, die geometries, die arrangements, and so on. Compound co‐electrospinning and precision‐deposition electrospinning have opened novel routes for advanced fiber and nonwoven architectures. Nanofiber systems offer novel opportunities for broad areas of application in material science and life science. Examples are functional nanofibers for optoelectronics, sensorics, catalysis, textiles, high efficiency filters, and fiber reinforcement, as well as tissue engineering, drug delivery, and wound healing.

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Electrospinning

Cited by 234 publications

References 1 publication

Release and antibacterial activity of allyl isothiocyanate/β-cyclodextrin complex encapsulated in electrospun nanofibers

Release and antibacterial activity of allyl isothiocyanate/β-cyclodextrin complex encapsulated in electrospun nanofibers

Selective isolation of the electron or hole in photocatalysis: ZnO–TiO2 and TiO2–ZnO core–shell structured heterojunction nanofibers via electrospinning and atomic layer deposition

Electrospinning

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