Needle’s vibration in needle-disk electrospinning process: Theoretical model and experimental verification

Abstract

Needle-disk electrospinning is a new technology for mass production of nanofibers. During the spinning process, the needle fixed on the rotating disk will vibrate. A vibration model is established, and the vibration frequency and largest deflection are obtained. The effect of the inertia force due to needle's vibration on the spinning process is elucidated. All theoretical results are in well agreement with the experiment data. The present theoretical results are helpful to optimize the needle-disk electrospinning.

The simpler, the better: Analytical methods for nonlinear oscillators and fractional oscillators

“…He's frequency formulation was initially inspired by an ancient Chinese algorithm 36 ; now this formulation has gained much attention and has been under development, with various modifications appearing in open literature. [37][38][39][40][41][42][43][44][45] We define a residual function R(t) as…”

“…30,31 The most important property of a nonlinear oscillator is the relationship between the frequency and its amplitude, the simplest method to estimate the frequency-amplitude relationship might be He's frequency formulation [32][33][34] and the max-min approach, 35,36 which are still under development and many modifications were proposed to improve the accuracy. [37][38][39][40][41][42][43][44][45] Consider a nonlinear oscillator in the form u 00 þ fðuÞ ¼ 0; uð0Þ ¼ A; u 0 ð0Þ ¼ 0…”

Energy-Saving Electrospinning with a Concentric Teflon-Core Rod Spinneret to Create Medicated Nanofibers

“…Thus far, the influence of the surface between the spinneret’s texture and the passing fluid has received little attention. Whereas, the influences are observed in all types of electrospinning methods including, bubble electrospinning, needleless electrospinning, free-surface electrospinning, reactive electrospinning, and the most common needle-based spinneret electrospinning [ 32 , 33 , 34 , 35 , 36 , 37 ].…”

Innovation of Critical Bubble Electrospinning and Its Mechanism

“…Along with the advent of an ever-increasing demand for the nano-industrialization, nanofibers become a unique class with many fascinating properties due to their nanoscale diameters and high surface area to volume ratio [1]. Electrospinning has been recognized as a versatile and effective technique for the preparation of various functional nanofibers, which can be modified to gain enormous attention for end applications, such as energy storage, sensors, filtration, textiles, tissue scaffolds, biomaterials, smart adhesion and so on [2][3][4][5][6][7][8][9][10][11][12]. Nevertheless, manufacturing upscaling of nanofibers from the laboratory to industry is still limited by its low production capacity.…”