Compound Core–Shell Polymer Nanofibers by Co‐Electrospinning

Sun, Zaicheng; Zussman, Eyal; Yarin, Alexander L.; Wendorff, Joachim H.; Greiner, Andreas

doi:10.1002/adma.200305136

Cited by 1,126 publications

(769 citation statements)

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“…Compared with other methods, electrospinning is more productive, cost effective, and less demanding for processing conditions. Various kinds of one-dimensional nano/micromaterials, including fibers [18], belts [19], tubes [20], and core-shell structured fibers [21] have been obtained with this method. Preparation of SiO 2 fiber using the sol-gel method has been investigated by several groups, and mature techniques have been developed [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Engineering and optimization of nano- and mesoporous silica fibers using sol–gel and electrospinning techniques for sorption of heavy metal ions

Teng

et al. 2011

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Engineering and optimization of nano- and mesoporous silica fibers using sol–gel and electrospinning techniques for sorption of heavy metal ions

Teng

et al. 2011

Journal of Colloid and Interface Science

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“…To estimate the actual evaporation time, a tubular nanofiber, [54][55][56] filled with solvent, is examined. This system can be considered as an extreme case of the model discussed 47 by Guenther et al 36 Use of such tubular nanofibers enables in situ tracking of the kinetics of solvent evaporation through the nanofiber shell.…”

Section: Postprocesses Relaxation In Electrospun Nanofibersmentioning

confidence: 99%

Electrospun polymer nanofibers: Mechanical and thermodynamic perspectives

Arinstein

Zussman

2011

J Polym Sci B Polym Phys

138

103

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This article reviews and discusses some open problems concerning polymer materials of reduced sizes and dimensions. Such objects exhibit exceptional physical properties when compared with their macroscopic counterparts. More specifically, abrupt increases in polymer nanofiber elastic modulus have been observed when diameters drop below a certain value. In addition, temperature dependence of elastic modulus is highly influenced by fiber diameter. Mechanical (macroscopic) analyses have failed to provide satisfactory explanations for the mechanisms ruling such features, calling for detailed microscopic examination of the systems in question. A hypothesis bridging the current knowledge gaps is presented. The key element of this hypothesis is based on confinement of the supermolecular microstructure of polymer nanofibers and its dominant role in the deformation process. This suggestion challenges the commonly held view suggesting that surface effects are the most significant parameters impacting mechanical and thermodynamic nanofiber behaviors. The review will focus on the mechanical and thermodynamic properties of electrospun polymer nanofibers, selected as representatives of nanoscale polymer objects.

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“…4 Recently, another promising coaxial electrospinning method has been developed for preparing ultralong nanotubes. [5][6][7][8] Electrospinning is a versatile top-down method for manufacturing 1-D nanomaterials 9 with various applications. 10,11 Coaxial electrospinning is an evolution of electrospinning, which is based on a spinneret consisting of two coaxial capillaries with different diameters.…”

mentioning

confidence: 99%

Bio-mimic Multichannel Microtubes by a Facile Method

2007

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Envied by many scientists, delicate multichannel (or multichamber) tubular structures have been adopted by a number of animals in long-term evolution. For example, feathers of many birds are of multichannel inner structure. It could reduce weight by increasing friction with air and serve as heat-shields from intense solar radiation. 1 To survive in an extremely formidable polar environment, pelts of some polar homeothermic species (e.g., polar bear) show excellent thermoinsulation properties which also benefit from their hair with multichamber structures. 2 These attractive features of nature are all results from the unique multichannel tubular inner structures.Partially similar with nature, traditional nanotubes with a single inner channel have attracted considerable interest for their broad applications. 3 Accordingly, various strategies have been proposed for building these materials. 4 Recently, another promising coaxial electrospinning method has been developed for preparing ultralong nanotubes. [5][6][7][8] Electrospinning is a versatile top-down method for manufacturing 1-D nanomaterials 9 with various applications. 10,11 Coaxial electrospinning is an evolution of electrospinning, which is based on a spinneret consisting of two coaxial capillaries with different diameters. By co-electrospinning two fluids with such special spinneret, nanotubes or core-shell nanofibers can be prepared. [5][6][7][8] Although methods for production of single channel nanotubes have been well established, artificial mimic multichannel tubular structures of nature in micro-to nanometer scale are still a giant challenge. To meet the emerging needs of multifunctional, integrative, and miniature devices, micro/nanomaterials with more complex inner structures are urgently expected.In this communication, we describe a multifluidic compoundjet electrospinning technique for the first time that could fabricate bio-mimic hierarchical multichannel microtubes in a facile and straightforward way. The experimental setup of the multifluidic compound-jet electrospinning is sketched in Figure 1a, where the three-channel tube (TCT) fabrication system is demonstrated as an example. Three metallic capillaries embedded in a plastic syringe were arranged at three vertexes of an equilateral triangle. These conductive metallic inner capillaries serve as inner fluid vessels and electrode at the same time. Two immiscible viscous liquids were fed separately to the three inner capillaries and an outer syringe in an appropriate flow rate. An ethanol solution of Ti(OiPr) 4 and poly(vinyl pyrrolidone) 6 served as outer liquid, while a commercially available innocuous paraffin oil was chosen for inner liquid. After a compound fluidic electrospinning process, a fibrous film was collected on the counter electrode. By removing the organics of as-prepared products through calcination, TiO 2 TCT was obtained. Figure 1b is a side-view image of the sample taken by field emission scanning electron microscopy (SEM), which exposes the cross section of the TCT. It c...

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Compound Core–Shell Polymer Nanofibers by Co‐Electrospinning

Cited by 1,126 publications

References 36 publications

Engineering and optimization of nano- and mesoporous silica fibers using sol–gel and electrospinning techniques for sorption of heavy metal ions

Engineering and optimization of nano- and mesoporous silica fibers using sol–gel and electrospinning techniques for sorption of heavy metal ions

Electrospun polymer nanofibers: Mechanical and thermodynamic perspectives

Bio-mimic Multichannel Microtubes by a Facile Method

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