Near-Field Electrospinning: Progress and Applications

He, Xiao-Xiao; Zheng, Jie; Yu, Gui-Feng; You, Ming-Hao; Yu, Miao; Ning, Xin; Long, Yun

doi:10.1021/acs.jpcc.6b12783

Cited by 184 publications

(143 citation statements)

References 126 publications

(251 reference statements)

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“…Additive patterning of materials for applications in biotechnology, sensors [167] or printed electronics has stimulated the development of different techniques related to high-resolution electrojet-printing, such as pyroelectrodynamic printing or other electrodynamic processes. [169] By setting the working distance between the spinneret and fiber collector to a position before the onset of the whipping instability, a predictable location control for the deposition of fibers is possible. [169] By setting the working distance between the spinneret and fiber collector to a position before the onset of the whipping instability, a predictable location control for the deposition of fibers is possible.…”

Section: Toward 3d Electrojettingmentioning

confidence: 99%

Emerging Trends in Information‐Driven Engineering of Complex Biological Systems

et al. 2019

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Synthetic biological systems are used for a myriad of applications, including tissue engineered constructs for in vivo use and microengineered devices for in vitro testing. Recent advances in engineering complex biological systems have been fueled by opportunities arising from the combination of bioinspired materials with biological and computational tools. Driven by the availability of large datasets in the “omics” era of biology, the design of the next generation of tissue equivalents will have to integrate information from single‐cell behavior to whole organ architecture. Herein, recent trends in combining multiscale processes to enable the design of the next generation of biomaterials are discussed. Any successful microprocessing pipeline must be able to integrate hierarchical sets of information to capture key aspects of functional tissue equivalents. Micro‐ and biofabrication techniques that facilitate hierarchical control as well as emerging polymer candidates used in these technologies are also reviewed.

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Section: Toward 3d Electrojettingmentioning

confidence: 99%

Emerging Trends in Information‐Driven Engineering of Complex Biological Systems

et al. 2019

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“…The slides were prepared with corona plasma treatment (Model: BD-20, Electro-Technic Products, Chicago, IL, USA) at the time of use to facilitate the NFES process on an insulator [13]. The plasma treatment spring tip (Model: 12,201 Spring Tip, Electro-Technic Products, Chicago, IL, USA) was positioned perpendicularly, 2 mm above the glass cover slide, and passed over the slide at a rate of 2 passes per second for 60 s. Treated slides were affixed to a 6″ × 6″ precision ground, electrically grounded aluminum plate (3511T151, McMaster-Carr, Elmhurst, IL, USA) on the NFES print bed. A voltage of −1.8 kV was applied for air gap distances less than 2 mm and −2.0 kV for distances greater than or equal to 2 mm to rapidly initiate fiber formation in under 10 s. This measure was implemented as excess solvent evaporation introduces variability and can inhibit fiber formation in the NFES process.…”

Section: Setup and Materialsmentioning

confidence: 99%

“…As both NFES and TES utilize a Taylor cone formed in an electric field, it suggests that if a polymer solution/melt has the viscosity, conductivity, and surface tension of TES, then NFES is also possible [11]. To date, numerous polymers have successfully NFES, including but not limited to, polyethylene oxide (PEO), polyvinylpyrrolidone (PVP), polycaprolactone (PCL), polystyrene (PS), and polyvinylidene fluoride (PVDF) [12]. Early NFES setups used an "ink and quill" approach to write fibers onto a grounded substrate.…”

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confidence: 99%

Characterization of Polydioxanone in Near-Field Electrospinning

et al. 2019

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Electrospinning is a popular method for creating random, non-woven fibrous templates for biomedical applications, and a subtype technique termed near-field electrospinning (NFES) was devised by reducing the air gap distance to millimeters. This decreased working distance paired with precise translational motion between the fiber source and collector allows for the direct writing of fibers. We demonstrate a near-field electrospinning device designed from a MakerFarm Prusa i3v three-dimensional (3D) printer to write polydioxanone (PDO) microfibers. PDO fiber diameters were characterized over the processing parameters: Air gap, polymer concentration, translational velocity, needle gauge, and applied voltage. Fiber crystallinity and individual fiber uniformity were evaluated for the polymer concentration and translational fiber deposition velocity. Fiber stacking was evaluated for the creation of 3D templates to guide the alignment of human gingival fibroblasts. The fiber diameters correlated positively with polymer concentration, applied voltage, and needle gauge; and inversely correlated with translational velocity and air gap distance. Individual fiber diameter variability decreases, and crystallinity increases with increasing translational fiber deposition velocity. These data resulted in the creation of tailored PDO 3D templates, which guided the alignment of primary human fibroblast cells. Together, these results suggest that NFES of PDO can be scaled to create precise geometries with tailored fiber diameters for biomedical applications.Polymers 2020, 12, 1 2 of 17 micro-fabricated silicone tip translating at an air gap distance of 5-15 mm over a counter electrode to write an individual fiber [10]. As with TES, this technique utilizes a charged polymer, in solution or melted with heat, to extrude a microfiber on a counter electrode, but the high degree of fiber control with this method arises from positioning the Taylor cone significantly closer to the counter electrode before any bending instabilities can occur. When paired with precise translational movement between the polymer source and collector, fibers can be directly "written" allowing for the creation of specific geometries that can be laid down layer-by-layer. As both NFES and TES utilize a Taylor cone formed in an electric field, it suggests that if a polymer solution/melt has the viscosity, conductivity, and surface tension of TES, then NFES is also possible [11]. To date, numerous polymers have successfully NFES, including but not limited to, polyethylene oxide (PEO), polyvinylpyrrolidone (PVP), polycaprolactone (PCL), polystyrene (PS), and polyvinylidene fluoride (PVDF) [12]. Early NFES setups used an "ink and quill" approach to write fibers onto a grounded substrate. However, NFES have progressed in using motion platforms or modified commercially available three-dimensional (3D) printers to position a spinneret with a continuous polymer source, therefore, allowing continuous fiber deposition with precise placement [10,11,13].In this paper, we inve...

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“…Mostly polymer nanofibers are produced by electrospinning but also metal, ceramic-based nanofibers have been obtained. [51][52][53][54][55] The highly open and interconnected nanofiber structure allows excellent access of fluids, e.g., low transport limitations for gases and liquids. These properties make nanofibers very interesting for a wide range of applications in energy storage and conversion, medical and healthcare, biotechnology to environmental engineering.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning of Metal–Organic Frameworks for Energy and Environmental Applications

2019

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organic linkers with a periodic, nanoscaled structure and ultrahigh surface areas. With their tunable pore/cage sizes, flexible skeleton, and large surface-to-volume ratio, [13][14][15][16][17][18][19] MOFs have a large potential for a wide range of applications, including gas storage and separation, rechargeable batteries, supercapacitors, solar cells, nanoreactors, heterogeneous catalysis, or drug delivery. [20][21][22][23][24][25][26][27] Recently, significant efforts have been devoted to the design and synthesis of new MOFs structures and the investigation of their physical or chemical properties. MOFs are generally prepared as bulk form through traditional hydrothermal or solvothermal synthesis. [28][29][30][31] In order to expand the application range, suitable pathways for the structuring of MOF powders into a functional architecture or devices are highly desirable.Currently, intensive efforts are focusing on the structuring of MOFs at the mesoscopic/macroscopic scale for the use as coatings, membranes, or sophisticated architectures in specific devices and applications. [32][33][34][35] A major difference in the structuring of MOFs into complex shapes compared to inorganic microporous materials, such as zeolites or silica, is the fact that most inorganic binders cannot be used for MOFs as these binders usually require heat treatment. The intrinsic fragility of MOFs needs to be considered which is related to the inorganic/organic hybrid character of this class of materials and the resulting limited thermal and mechanical stability. Alternatively, a more effective way to structure MOFs is the combination with polymer materials. The polymer which acts as a binder improves the mechanical flexibility and ensures chemical stability. Numerous methods have been developed for structuring MOF-polymer compositions including hard or soft templates, spin-or dip-coating, spray-drying, printing, or lithography approaches. [36][37][38] The integration of MOFs into a polymer matrix can result in poor MOF-polymer dispersion and compatibility issues owing to the different physical and chemical properties for the two kinds of materials and this is a challenge in some applications, e.g., in MOF-based mixed matrix membranes for gas separation. [39][40][41][42] The poor interfacial compatibility would lead to agglomeration of MOF particles, causing the formation of nonselective voids between the MOFs particles and the polymer.Electrospinning is a fabrication method to produce continuous ultrafine fibers with diameters in the range of a few tens of nanometers to a few micrometers in the form of nonwoven mats, yarns, etc. The mechanism of electrospinning is based Herein, recent developments of metal-organic frameworks (MOFs) structured into nanofibers by electrospinning are summarized, including the fabrication, post-treatment via pyrolysis, properties, and use of the resulting MOF nanofiber architectures. The fabrication and post-treatment of the MOF nanofiber architectures are described systematically by two routes: i) the dire...

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Near-Field Electrospinning: Progress and Applications

Cited by 184 publications

References 126 publications

Emerging Trends in Information‐Driven Engineering of Complex Biological Systems

Emerging Trends in Information‐Driven Engineering of Complex Biological Systems

Characterization of Polydioxanone in Near-Field Electrospinning

Electrospinning of Metal–Organic Frameworks for Energy and Environmental Applications

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