Near-Field Electrospinning and Melt Electrowriting of Biomedical Polymers—Progress and Limitations

King, William E.; Bowlin, Gary L.

doi:10.3390/polym13071097

Cited by 30 publications

(26 citation statements)

References 102 publications

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“…Solution electrospinning was developed rapidly from a single-fluid blending processes [ 11 ] to coaxial [ 12 ], side by side [ 13 ], tri-axial [ 14 ], and other complex processes [ 15 ]; however, the high toxicity of organic solvent used in the solution electrospinning for preparation of working fluid is incompatible with the in vivo biomedical applications [ 16 ]. Thus, besides convenience and simplicity, energy saving [ 17 ] and environmental friendliness [ 18 ] are always desired for developing new electrospinning processes. Consequently, an increasing number of researchers have made considerable efforts to produce ultrafine fibers by solvent-free melt electrospinning because of the unavailability of non-toxic accessory substances.…”

Section: Introductionmentioning

confidence: 99%

Bamboo Charcoal/Poly(L-lactide) Fiber Webs Prepared Using Laser-Heated Melt Electrospinning

et al. 2021

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Although several studies have reported that the addition of bamboo charcoal (BC) to polylactide (PLA) enhances the properties of PLA, to date, no study has been reported on the fabrication of ultrafine BC/poly(L-lactide) (PLLA) webs via electrospinning. Therefore, ultrafine fiber webs of PLLA and BC/PLLA were prepared using PLLA and BC/PLLA raw fibers via a novel laser electrospinning method. Ultrafine PLLA and BC/PLLA fibers with average diameters of approximately 1 μm and coefficients of variation of 13–23 and 20–46% were obtained. Via wide-angle X-ray diffraction (WAXD) analysis, highly oriented crystals were detected in the raw fibers; however, WAXD patterns of both PLLA and BC/PLLA webs implied an amorphous structure of PLLA. Polarizing microscopy images revealed that the webs comprised ultrafine fibers with uniform diameters and wide variations in birefringence. Temperature-modulated differential scanning calorimetry measurements indicated that the degree of order of the crystals in the fibers was lower and the molecules in the fibers had higher mobilities than those in the raw fibers. Transmittance of BC/PLLA webs with an area density of 2.6 mg/cm2 suggested that the addition of BC improved UV-shielding efficiencies.

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Section: Introductionmentioning

confidence: 99%

Bamboo Charcoal/Poly(L-lactide) Fiber Webs Prepared Using Laser-Heated Melt Electrospinning

et al. 2021

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“…We chose polyethylene oxide (PEO) as the electrospinnable polymer feedstock due to its high popularity in NFES. [24] In NFES, the dominant factors of a solvent are conductivity, dielectric constant, and vapor pressure. [25,26] To investigate a wide range of these properties in the 3D stacking of electrospun fibers, we chose de-ionized water, methanol, and dichloromethane (DCM) as the solvents for solution preparation.…”

Section: Resultsmentioning

confidence: 99%

Wall Microstructures of High Aspect Ratio Enabled by Near‐Field Electrospinning

et al. 2022

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Near‐field electrospinning (NFES) holds the potential to develop into a versatile additive nanomanufacturing platform. However, the impact of a variety of processing variables remains unresolved.Herein, the effect of solvents used to prepare suitable solutions for 3D microstructuring by electrospinning is studied. 3D straight walls of stacked fibers are fabricated using a layer‐by‐layer fiber deposition approach. The effect of the choice of substrate material is also explored. The results show that a high vapor pressure, and a low dielectric constant of the solvent, as well as a high substrate conductivity facilitate improved stacking of fiber layers. Utilizing these conditions, 3D stacked walls of polyethylene oxide are fabricated, and a maximum aspect ratio of 191.7 ± 52.6, while using a chromium/gold substrate and dichloromethane/methanol as the solvent is achieved.

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“…The delivery system forces the melted polymers through the nozzle under air pressure and these materials will be driven to the collector under the electrical field. [59,[73][74][75]…”

Section: D Printingmentioning

confidence: 99%

Smart Film Actuators for Biomedical Applications

Zhang

Wang

Qiao

et al. 2022

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Taking inspiration from the extremely flexible motion abilities in natural organisms, soft actuators have emerged in the past few decades. Particularly, smart film actuators (SFAs) demonstrate unique superiority in easy fabrication, tailorable geometric configurations, and programmable 3D deformations. Thus, they are promising in many biomedical applications, such as soft robotics, tissue engineering, delivery system, and organ‐on‐a‐chip. In this review, the latest achievements of SFAs applied in biomedical fields are summarized. The authors start by introducing the fabrication techniques of SFAs, then shift to the topology design of SFAs, followed by their material selections and distinct actuating mechanisms. After that, their biomedical applications are categorized in practical aspects. The challenges and prospects of this field are finally discussed. The authors believe that this review can boost the development of soft robotics, biomimetics, and human healthcare.

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Near-Field Electrospinning and Melt Electrowriting of Biomedical Polymers—Progress and Limitations

Cited by 30 publications

References 102 publications

Bamboo Charcoal/Poly(L-lactide) Fiber Webs Prepared Using Laser-Heated Melt Electrospinning

Bamboo Charcoal/Poly(L-lactide) Fiber Webs Prepared Using Laser-Heated Melt Electrospinning

Wall Microstructures of High Aspect Ratio Enabled by Near‐Field Electrospinning

Smart Film Actuators for Biomedical Applications

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