Research on Deposition Characteristics of the Double-Nozzle in Near-Field Electrospinning

Wang, Zhi Feng; Chen, Xin Du; Huang, Shen Neng; Fang, Fei; Wang, Han

doi:10.4028/www.scientific.net/kem.679.59

Cited by 2 publications

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“…both experimental and computational analysis, highlight that collector distance, nozzle spacing, nozzle length, and applied voltage are the main parameters controlling this electrical crossover. [86,[88][89][90][91][92] In general, the inter-fiber distance deposition increases with an increment in collector distance and nozzle spacing and reduces when needle length increases. In addition, these publications propose several mathematical approaches and computational simulations to understand and predict the multi-nozzle system electrical crossover interference.…”

Section: Pushing the Boundaries Of Ehd Printingmentioning

confidence: 99%

Electrohydrodynamic 3D Printing of Aqueous Solutions

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Lanceros‐Méndez

et al. 2022

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flow rate, nozzle diameter, and collector distance), as well as physicochemical properties of the fluid, induce different EHD effects, each one unique in terms of potential, limitations, and applicability. [7] A schematic showing selected examples of EHD techniques, and a summary grouping their general parameters are provided in Figure 1 and Table 1, respectively.By taking advantage of Rayleigh-Plateau instabilities, electrospraying and drop-on-demand EHD approaches allow particle generation, generally using lowconcentration polymer solutions. Electrospraying allows significant material volume processing but offers limited control in terms of size, shape, and particle placement accuracy (Figure 1a). [26] Drop-on-demand, in contrast, deals with smaller volumes but increases the control over the processed particle and printing resolution (Figure 1b). [27] As described by Taylor in 1969, by preventing Rayleigh-Plateau instabilities through the increase of fluid molecular entanglements, it is possible to achieve a continuous jet. [28,29] In electrospinning, small diameter fibers are achieved by taking advantage of bending or "whipping" instabilities, induced by large surface charge density. The non-woven mats obtained using electrospinning have been of great interest for nanotechnology research, however, accurate fiber deposition is challenging (Figure 1c). [29] In EHD writing (electrowriting [EW]), lower voltages prevent these whipping instabilities, and the EHD phenomenon results in the sustaining of a fluid jet at low flow rates, allowing for accurate control over fiber dimension and deposition (Figure 1e). [28] The control of material placement is a crucial feature for additive manufacturing since this permits the precise deposition of fibers forming 2D layers, which can be repeated to produce highly complex highresolution 3D structures. This becomes even more crucial for biomedicine where a key goal is to mimic the biological environment of native tissue to support and guide cellular growth or understand tissue regeneration mechanisms. [30,31] The use of jet-deflecting auxiliary electrodes allows the control of bending or "whipping" instabilities to achieve the accurate patterning of nanofibers, providing an intermediate approach between electrospinning and EW [32] (Figure 1d).EHD techniques have primarily focused on processing polymeric materials, although metals and ceramics have also been explored. [33,34] Polymeric melts provide a low-toxicity alternative avoiding the use of hazardous solvents, decreasing the material consumption, and reducing processing variables (e.g., evaporation), but have a limited selection of available materials. [35] Solution-based EHD processing can process a wider range of materials, however, commonly used organic solvents are often Among the various electrohydrodynamic (EHD) processing techniques, electrowriting (EW) produces the most complex 3D structures. Aqueous solution EW similarly retains the potential for additive manufacturing well-resolved 3D structures, while providing n...

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Section: Pushing the Boundaries Of Ehd Printingmentioning

confidence: 99%

Electrohydrodynamic 3D Printing of Aqueous Solutions

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Tandon

Lanceros‐Méndez

et al. 2022

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“…The mentioned NFES approaches above are all assembled with single nozzle, however, due to the flow restriction, single-nozzle NFES system is unable to cope with mass production, which limits the industrial utilization in precision manufacturing. To improve the high-precision production efficiency and rate, a multinozzle NFES system (Figure ) was presented. − On the basis of the mutual influence of the charged jets under shifty conditions, the deposition characteristics of double-nozzle and triple-nozzle NFES systems have been demonstrated and analyzed. The mutual distance of deposition was mainly influenced by nozzle spacing and working distance, on the other hand, the influence of voltage was not particularly apparent, and analysis suggested that the main reason for these phenomena may be the function of Coulomb force.…”

Section: Progress and Mechanism Of Nfesmentioning

confidence: 99%

Near-Field Electrospinning: Progress and Applications

et al. 2017

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Electrospinning is a straightforward and versatile method to fabricate ultrafine fibers with unique physical and chemical properties. However, the chaotic nature of traditional electrospinning limits its applications in devices which usually need arranged or patterned micro/nanoscale fibrous structures. In order to improve the controllable deposition of electrospun fibers, near-field electrospinning (NFES) has been proposed and developed in recent years. With characteristics of position-controlled deposition, NFES significantly expands the range of fiber-fabrication uses including electronic components, energy harvesting, flexible sensors, and tissue engineering. In this paper, the basic principle and research advances of NFES have been briefly reviewed. In particular, we summarize the process parameters, polymer materials, as-spun fibrous structures, modified apparatus, and potential applications of NFES. Finally, future prospects on the development tendency and challenges of NFES are discussed.

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Research on Deposition Characteristics of the Double-Nozzle in Near-Field Electrospinning

Cited by 2 publications

References 9 publications

Electrohydrodynamic 3D Printing of Aqueous Solutions

Electrohydrodynamic 3D Printing of Aqueous Solutions

Near-Field Electrospinning: Progress and Applications

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