Nanocomposite fabric formation by electrospinning and electrospraying technologies

Jaworek, A.; Krupa, A.; Lackowski, M.; Sobczyk, Arkadiusz; Czech, T.; Ramakrishna, Seeram; Sundarrajan, Subramanian; Pliszka, D.

doi:10.1016/j.elstat.2008.12.019

Cited by 102 publications

(55 citation statements)

References 10 publications

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“…Whether the polymer jet eventually forms a smooth fiber or is dispersed into droplets depends on the polymer's molecular weight and chain entanglement, as well as the solvent used in the process. If the product of the intrinsic viscosity of the polymer [η] and polymer concentration c, known as the Berry's number (Be = [η]c), is greater than a threshold value, small fibers will be produced and the process is termed M a n u s c r i p t electrospinning; otherwise, the polymer jet will be disintegrated into droplets and the process is called electrospraying [31]. Specifically in electrospinning, an increase in viscosity leads to an increase in nanofiber diameter, while an increase in the surface tension or conductivity of the polymer solution results in a decrease in nanofiber diameter.…”

Section: Polymer Nanofiber Synthesis Via Electrospinningmentioning

confidence: 99%

“…The organization and composition of cartilage ECM vary spatially from the superficial to the deep zones. From the superficial zone to the deep zone of cartilage, the concentration of type II collagen decreases while that of proteoglycan increases[31]. The superficial zone is acellular, consisting of collagen fibrils with a course parallel to the articular surface; while the underneath, middle, and deep zones are formed by a dense, parallel array of collagen fibrils that are oriented Page 24 of 65…”

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confidence: 99%

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Electrospinning of polymer nanofibers for tissue regeneration

Jiang

Carbone

et al. 2015

Progress in Polymer Science

433

242

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Repair and regeneration of human tissues and organs using biomaterials, cells, and/or growth factors is a great challenge for tissue engineers and surgeons. The convergence of advanced materials science, nanotechnology, stem cell science, and developmental biology, which we define as Regenerative Engineering, represents the next multidisciplinary paradigm to engineer complex tissues. One of the grand challenges in this field is to mimic closely the hierarchical architecture and properties of the extracellular matrices (ECM) of the native tissues.A bio-inspired approach to creating biomaterials with nanoscale topographical features, microand macroscale gradient structures, and biological domains to interact with target growth factors and cells is key to overcoming this challenge for successful tissue regeneration. Furthermore, the healing and repair of diseased musculoskeletal tissues rely on many signaling pathways, involving numerous growth factors and their receptors. Thus, pharmacological manipulation of the signaling pathways with bioactive molecules is an important component of tissue regeneration. This review summarizes current strategies to develop advanced nanofibrous polymer-based scaffolds via electrospinning, their applications in regenerating human musculoskeletal tissues, and the use of polymer nanofibers to deliver growth factors or small molecules for regenerative medicine.

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Section: Polymer Nanofiber Synthesis Via Electrospinningmentioning

confidence: 99%

mentioning

confidence: 99%

Electrospinning of polymer nanofibers for tissue regeneration

Jiang

Carbone

et al. 2015

Progress in Polymer Science

433

242

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“…Figure 3 clearly shows that the jet thins from the apex of the Taylor cone along its trajectory depicting an increase in stretching of the jet. This is well known from earlier studies (Hohman et al 2001a;Feng 2002;Jaworek et al 2009), but has not been accurately measured. Therefore, a systematic study was performed to precisely correlate the jet radius with the operating parameters to yield relevant correlation formulae.…”

Section: Analysis Of the Radius Along The Trajectory Of The Electrospmentioning

confidence: 83%

New correlation formulae for the straight section of the electrospun jet from a polymer drop

2013

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An electrospun polymer jet issued from a Taylor cone follows a straight-line motion before experiencing electrical bending instability resulting in curling and spiralling of the jet in three-dimensional space. Experiments are performed to characterize the fluid dynamics of an electrospun polymer jet. Appropriate image processing is performed to systematically analyse flow regimes of the electrospun jet. These regimes include Taylor cone formation/jet initiation and the straight section of the jet. Dimensional analysis was performed to identify the salient dimensionless parameters, which govern the electrospun jet characteristics. Three new correlation formulae were obtained to characterize the dimensionless jet diameter at the apex of the Taylor cone (d = 1.03Q 0.44 ), the dimensionless jet diameter at different locations along the jet's straight section (dz 1/4 = 1.09Q 1/2 ), as well as the length of the straight section of the jet (Z in = 86Q 0.42 ). These correlation formulae are valid for the analysed range of dimensionless flow rates (2.6×10 −4

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“…The basic concept of the combined electrospinning/electrospraying process was already reported for the preparation of nanocomposite nonwovens. [ 27,28 ] However, in contrast to the 2F ceramic separators presented herein (featured with densely packed functional (i.e., metal chelating) ceramic particles besieged by electrospun functional nanofi ber skeleton), the previous works were just limited to simple modifi cation of polymer nanofi ber fabrics with ceramic powders (specifi cally, small amount of metal oxide nanoparticles were loaded along the surface of polymer nanofi bers) in order to increase effective surface area of the loaded metal oxide catalysts [ 27 ] or improve electrochemical properties of the pristine polymer nanofi ber membranes. [ 28 ] As a preliminary step for the development of 2F ceramic separators, a model ceramic separator comprising Al 2 O 3 particles and polyvinylidene fl uoride (PVdF), both of which were not chemically active, was fabricated with the aim of exploring wileyonlinelibrary.com feasibility of the simultaneous electrospraying/electrospinningdriven manufacturing process and also investigating basic properties of the ceramic separator.…”

Section: Doi: 101002/aenm201500954mentioning

confidence: 97%

Superlattice Crystals–Mimic, Flexible/Functional Ceramic Membranes: Beyond Polymeric Battery Separators

Kim

et al. 2015

Advanced Energy Materials

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structural integrity upon mechanical deformation. In addition, thickness reduction is another challenging issue in the development of ceramic membranes. For these reasons, no meaningful results have been reported with ceramic membranes for battery separator applications.Among numerous architectural innovations of advanced materials, superlattice crystals, which are characterized with highly ordered/close-packed particle arrays, have been extensively investigated as a compelling building template in a wide variety of application fi elds such as photonic crystals, catalysts, electrodes, and sensors. [16][17][18] From the viewpoint of battery separator requirements, the close-packed particle arrays of superlattice crystals are expected to offer exceptional benefi ts for the thermal stability, dimensional rigidity and, more notably, porous structure (i.e., interstitial voids formed between the particles), although they are mechanically fragile upon external deformation stress.Considering again the key role [7][8][9] of battery separators as ion-conducting channels between electrodes, functional separators bearing chemical traps (that can capture unwanted heavy metal ions dissolved in liquid electrolyte) are expected to provide benefi cial effects on cell performance. For example, spinel lithium manganese oxide (LiMn 2 O 4 , LMO) materials, [ 19,20 ] which are widely used in large-scale batteries for applications in EVs and ESSs, are struggling with dissolution of Mn 2+ ions at elevated temperatures. The Mn 2+ dissolution-triggered disruption/contamination of electrodes are known to provoke capacity fading during charge/discharge cycling. Most of previous studies on this issue have been devoted to synthesis/ engineering of cathode materials, functional binders, and electrolytes. [21][22][23][24] Unfortunately, very few works, [ 25,26 ] which were simply focused on the surface modifi cation of polyethylene (PE) separators, were reported with battery separators.Here, intrigued by the abovementioned structural novelty/ potential benefi ts of ceramic membranes/superlattice crystals and also spurred by the urgent demand for chemical traps of heavy metal ions, we demonstrate a new class of ultimate battery separator based on fl exible/functional porous ceramic membranes (referred to as "2F ceramic separators") for highperformance lithium-ion batteries. The 2F ceramic separators are comprised of densely packed ceramic particles spatially besieged by electrospun nanofi ber skeleton. Both the ceramic particles and nanofi bers are rationally designed and synthesized to possess well-developed porous structure and also chemical functionality (as a new concept of chemical trap for chelating unwanted heavy metal ions dissolved in electrolytes). The compactly packed ceramic particles in the 2F separators, similar to the superlattice crystals, offer exceptional thermal stability/ dimensional rigidity and allow the formation of 3D-reticulated interstitial voids (that will be fi lled with liquid electrolyte). The

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Nanocomposite fabric formation by electrospinning and electrospraying technologies

Cited by 102 publications

References 10 publications

Electrospinning of polymer nanofibers for tissue regeneration

Electrospinning of polymer nanofibers for tissue regeneration

New correlation formulae for the straight section of the electrospun jet from a polymer drop

Superlattice Crystals–Mimic, Flexible/Functional Ceramic Membranes: Beyond Polymeric Battery Separators

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