Effect of the Spin-Line Temperature Profile on the Translocation of the Solidification Point and Jet Thinning in Unconfined Melt Electrospinning

Shabani, Elnaz; Yancheshme, Amir Azimi; Ronen, Avner; Gorga, Russell E.

doi:10.1021/acsapm.0c01082

Cited by 15 publications

(5 citation statements)

References 31 publications

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“…In comparison to electrospinning from a polymer solution, despite the benefits afforded by melt electrospinning, the technology has not achieved more popularity and has not been frequently employed. This is mostly owing to the high viscosity, high process temperatures, and the inability to create nanometer-sized fibers [64][65][66][67][68][69][70].…”

Section: Melt Electrospinningmentioning

confidence: 99%

Electrospinning: The Technique and Applications

Sharma¹,

James²

2023

Recent Developments in Nanofibers Research

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Electrospinning is a useful and convenient method for producing ultrathin fibers. It has grabbed the scientific community’s interest due to its potential to produce fibers with various morphologies. Numerous efforts have been made by researchers and industrialists to improve the electrospinning setup and the associated techniques in order to regulate the morphology of the electrospun fibers for practical applications. Porous, hollow, helical, aligned, multilayer, core-shell, and multichannel fibers have been fabricated for different applications. This chapter aims to provide readers with a clear understanding of the electrospinning process: its principle, methodology, materials, and applications. The chapter begins with a brief introduction to the history of electrospinning, followed by a discussion of its principle and the basic components of electrospinning setup. The parameters that affect the electrospinning process such as operating parameters and the properties of the material being electrospun are discussed briefly. An overview of the different types of electrospinning technique, capable of producing nanofibers with different morphologies, is also presented. Afterward, the applications of electrospun nanofibers, including their use in biomedical applications, filtration, energy sectors, and sensors applications are discussed succinctly. The perspectives on the challenges, opportunities, and new directions for future development of electrospinning technology are also offered.

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Section: Melt Electrospinningmentioning

confidence: 99%

Electrospinning: The Technique and Applications

Sharma¹,

James²

2023

Recent Developments in Nanofibers Research

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“…Morphology of fibers and particles is affected by three different categories of parameters: solution (viscosity, particle concentration, surface tension, and solvent polarity), process (applied voltage, nozzle-collector distance, and flow rate) and ambient (ambient temperature, air flow, and humidity). 26,27 Various researchers have studied the influence of these parameters in electrospinning [28][29][30][31][32] and electrospraying techniques. 25,27,33,34 Flow rate and voltage are two critical process parameters, higher voltage and lower flow rates provide smaller droplets.…”

Section: Patterningmentioning

confidence: 99%

Understanding the role of bond point strain in the mechanical response of nonwoven polypropylene materials

Garmabi

Elamin

Bradford

et al. 2022

Journal of Composite Materials

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A method was developed to study micromechanics of a bond point in nonwoven polypropylene materials. The micromechanical behavior of the thermal bonded nonwovens was studied using the digital image correlation (DIC) technique to understand the bond points deformation during mechanical stretching. An electrospray technique was used as a fast and reliable method to create the speckle pattern on the nonwovens. Various parameters of the electrospraying and their influence on the pattern accuracy and repeatability was studied and the best pattern in terms of dot size and distribution was determined from experimentation. Plasma treatment also proved to be essential to enhance the uniform distribution and adherence of the particles on the surface. Unloaded DIC experiments were carried out and proved the accuracy of technique with errors of lower than 0.5% strain. An automated high-resolution tensile apparatus was built and loaded DIC experiments were carried out using the device. The fabric was tested in Machine Direction (MD) direction and Cross Direction (CD) directions, both showing good correlation with low errors. Average strain values in bond points were plotted against total strain in fabric and the results showed noticeable amounts of strains developed in the bond points, contradictory to most of the FEM models which consider no deformation in the bond points. Results also indicated that in MD direction deformation, bond points can experience more than 30% of the overall strain presented in the fabric.

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“…Regrettably, the location of jet thinning and how the multi-physical field influences the thinning effect have not received sufficient consideration yet. According to Elnaz Shabani, 20 the drawing process of molten jets occurs in the liquid phase region before phase transformation. An insufficient chain flow in the solid phase results in the non-stretchable properties of the jet in this state.…”

mentioning

confidence: 99%

Multiphysics modeling and experimental verification of solidification point of melt-electrospun jet

Zheng

Newton

et al. 2022

Textile Research Journal

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Melt electrospinning has been recognized as an attractive solvent-free process over the past few decades to alleviate the solvent-related problems generated by traditional electrospinning techniques. In melt spinning, the drawing process of molten jets occurs in the liquid phase region before the phase transformation. Besides, the insufficient chain flow in the solid phase results in the non-stretchable properties of the jet in this state. This analysis predicted the phase transition displacement in the polymer jet during the melting process using a two-dimensional non-isothermal flow model integrated with an electric field. High-speed photography was employed to collect photographs of the phase transition point of the jet to verify the simulation results. Additionally, we evaluated the diameters of fibers manufactured with various phase transition displacements induced by different applied voltages. The findings of the experiments reveal that as the applied voltage is enhanced, the freezing point of the jet becomes gradually closer to the nozzle side, and the solidification length significantly reduces, resulting in smaller fiber diameter. Moreover, the results mentioned above are consistent with the law predicted by the simulation, proving the feasibility and accuracy of the model. This work will provide potential guidance for the study of nanoscale melt fibers from the perspective of fluid phase transformation.

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Effect of the Spin-Line Temperature Profile on the Translocation of the Solidification Point and Jet Thinning in Unconfined Melt Electrospinning

Cited by 15 publications

References 31 publications

Electrospinning: The Technique and Applications

Electrospinning: The Technique and Applications

Understanding the role of bond point strain in the mechanical response of nonwoven polypropylene materials

Multiphysics modeling and experimental verification of solidification point of melt-electrospun jet

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