Parameter study and characterization for polyacrylonitrile nanofibers fabricated via centrifugal spinning process

Lü, Yao; Li, Ying; Zhang, Shu; Xu, Guanjie; Fu, Kun; Lee, Hun; Zhang, Xiangwu

doi:10.1016/j.eurpolymj.2013.09.017

Cited by 160 publications

(132 citation statements)

References 29 publications

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“…There exist a few scholarly articles that experimentally study nanofibre fabrication by various centrifugal spinning methods, essentially to evaluate the effects of the process parameters such as fibre temperature (Sedaghat, Taheri-Nassaj & Naghizadeh 2006;Wang et al 2011), polymer concentration (Lu et al 2013;Ren et al 2013) as well as rotational speed and orifice size (Weitz et al 2008;Badrossamay et al 2010;Vazquez, Vasquez & Lozano 2012;Mary et al 2013). In a detailed study using high-speed photography, Padron et al (2013) explored the effects of several controllable parameters on fibre trajectory and final fibre radius, finding for example that both increasing spinneret angular velocity and decreasing polymer concentration result in thinner fibres.…”

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confidence: 99%

Regularized string model for nanofibre formation in centrifugal spinning methods

et al. 2017

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We develop a general regularized thin-fibre (string) model to predict the properties of non-Newtonian fluid fibres generated by centrifugal spinning. In this process the fibre emerges from a nozzle of a spinneret that rotates rapidly around its axis of symmetry, in the presence of centrifugal, Coriolis, inertial, viscous/shear-thinning, surface tension and gravitational forces. We analyse the effects of five important dimensionless groups, namely, the Rossby number (Rb), the Reynolds number (Re), the Weber number (We), the Froude number (Fr) and a power-law index (m), on the steady state trajectory and thinning of fibre radius. In particular, we find that the gravitational force mainly affects the fibre vertical angle at small arc lengths as well as the fibre trajectory. We show that for small Rb, which is the regime of nanofibre formation in centrifugal spinning methods, rapid thinning of the fibre radius occurs over small arc lengths, which becomes more pronounced as Re increases or m decreases. At larger arc lengths, a relatively large We results in a spiral trajectory regime, where the fibre eventually recovers a corresponding inviscid limit with a slow thinning of the fibre radius as a function of the arc length. Viscous forces do not prevent the fibre from approaching the inviscid limit, but very strong surface tension forces may do so as they could even result in a circular trajectory with an almost constant fibre radius. We divide the spiral and circular trajectories into zones of no thinning, intense thinning and slow or ceased thinning, and for each zone we provide simple expressions for the fibre radius as a function of the arc length.

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confidence: 99%

Regularized string model for nanofibre formation in centrifugal spinning methods

et al. 2017

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“…Elektroüretim (electrospinning) nanoliflerin üretiminde yaygın olarak kullanılan yöntemdir [14]. Laboratuvar ölçekli üretimler için kurulumu basit ve düşük maliyetli olmasına rağmen bu yöntem endüstriyel uygulamalar için düşük üretim hızı, çevresel faktörlere bağımlı olma ve yüksek elektrik alan gereksinimi sebebiyle güvenlik problemi gibi dezavantajlara sahiptir [15]. Dolayısıyla son yıllar-da bu problemleri aşabilmek için hem elektroüretim yönteminin geliştirilmesi [16][17][18] hem de alternatif yöntemlerin açığa çıka-rılması [19] üzerine araştırmalar yapılmaktadır.…”

Section: Introductionunclassified

Antibakteriyel Nanolif Yapılarının Çözeltiden Üfleme Sistemi ile Üretimi ve Karakterizasyonu

Gökçe¹,

Akgül²,

Kılıç³

et al. 2018

J Text Eng

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“…The diameters of fibers can vary from several nanometers to micrometers and the production rate of the centrifugal spinning process could be more than 500 times faster than conventional electrospinning technique [8,14]. In an earlier study, it has been reported that the average production rate of a laboratory-scale centrifugal spinning device was around 50 g/h, which was at least two orders of magnitude higher than that of a typical laboratory-scale electrospinning process [16]. Zhang et al [15] reported cost comparison for different production methods.…”

Section: Introductionmentioning

confidence: 99%

“…In centrifugal spinning, the morphology of nanofibers is affected by solution properties, including viscosity, surface tension, molecular structure, molecular weight, solution concentration, solvent structure, additive and operational conditions such as rotating speed, spinning head diameter, nozzle diameter and nozzle-collector distance [15]. Lu et al [16] investigated the effects of solution properties and operational parameters on the morphology of centrifugally-spun Polyacrylonitrile (PAN) nanofibers. It was found that increasing concentration and viscosity led to increase in fiber diameter.…”

Section: Introductionmentioning

confidence: 99%

Polymethylmethacrylate/Polyacrylonitrile Membranes via Centrifugal Spinning as Separator in Li-Ion Batteries

Yanılmaz

Zhang²

2015

Polymers

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Electrospun nanofiber membranes have been extensively studied as separators in Li-ion batteries due to their large porosity, unique pore structure, and high electrolyte uptake. However, the electrospinning process has some serious drawbacks, such as low spinning rate and high production cost. The centrifugal spinning technique can be used as a fast, cost-effective and safe technique to fabricate high-performance fiber-based separators. In this work, polymethylmethacrylate (PMMA)/polyacrylonitrile (PAN) membranes with different blend ratios were produced via centrifugal spinning and characterized by using different electrochemical techniques for use as separators in Li-ion batteries. Compared with commercial microporous polyolefin membrane, centrifugally-spun PMMA/PAN membranes had larger ionic conductivity, higher electrochemical oxidation limit, and lower interfacial resistance with lithium. Centrifugally-spun PMMA/PAN membrane separators were assembled into Li/LiFePO4 cells and these cells delivered high capacities and exhibited good cycling performance at room temperature. In addition, cells using centrifugally-spun PMMA/PAN membrane separators showed superior C-rate performance compared to those using microporous polypropylene (PP) membranes. It is, therefore, demonstrated that centrifugally-spun PMMA/PAN membranes are promising separator candidate for high-performance Li-ion batteries.

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Parameter study and characterization for polyacrylonitrile nanofibers fabricated via centrifugal spinning process

Cited by 160 publications

References 29 publications

Regularized string model for nanofibre formation in centrifugal spinning methods

Regularized string model for nanofibre formation in centrifugal spinning methods

Antibakteriyel Nanolif Yapılarının Çözeltiden Üfleme Sistemi ile Üretimi ve Karakterizasyonu

Polymethylmethacrylate/Polyacrylonitrile Membranes via Centrifugal Spinning as Separator in Li-Ion Batteries

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