A Very Stable High Throughput Taylor Cone-jet in Electrohydrodynamics

Morad, Mohammad Reza; Rajabi, Armin; Razavi, Mansour; Sereshkeh, S. R. Pejman

doi:10.1038/srep38509

Cited by 88 publications

(64 citation statements)

References 45 publications

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“…As the electrical potential difference increases, the viscosity and surface tension of the solution will be overcome. Then, a whipping instability of the jet will occur, causing it to travel in a vigorous spiral motion . Apart from whipping instability, the splaying or splitting of a single solution jet into multifilament can also happen .…”

Section: Introductionmentioning

confidence: 99%

Design of polyurethane fibers: Relation between the spinning technique and the resulting fiber topology

Joo

Lee

Ang

et al. 2019

J of Applied Polymer Sci

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Properties or characteristics of fibers are affected by their topology. In fact, these topologies are found to have significant impacts in the functionalities of many applications. Hence, in this study, the relations between the spinning techniques and the topology of the resulting fibers are studied with the aim to provide a guideline for future reference where fibers with certain topology can be fabricated to suit specific applications. For this purpose, polyurethane is chosen to be the raw material to fabricate the fibers due to its versatility to be applied in various fields. The surface morphology, structures, and alignments of the fibers are studied. It is found that the polymer solution properties largely influence the mechanisms in the spinning process and can significantly affect the topology of the fibers. For instance, viscous solutions enable the spinning of coiled and smooth fibers, whereas conductive solutions encourage the splaying of the solution jet which results in the spinning of straight fibers.

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Section: Introductionmentioning

confidence: 99%

Design of polyurethane fibers: Relation between the spinning technique and the resulting fiber topology

Joo

Lee

Ang

et al. 2019

J of Applied Polymer Sci

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show abstract

“…Both configurations have their advantage and disadvantages in different aspects and perspectives. The Taylor cone formation is the most important phenomenon to produce finer and even fiber diameter using the minimum voltage 40,41 . The sphere shaped polymer droplet creation and the uniform Taylor cone formation are the key advantages in needle electrospinning, that facilitates to produce smooth and finer fibers.…”

Section: Resultsmentioning

confidence: 99%

“…Among several methods for mass production of nanofibers, creation of multiple jets using rotating disks 32 , conical wire coil 33 , rollers 34 , balls 14 , bubbles 35 , rod 36 , Twisted wire spinnerets 37 and cones 38,39 have turned the electrospinning technique, the most effective process for nanofiber production. In most of the needleless upward electrospinning, numerous jets are formed simultaneously from the liquid surfaces without the influence of capillary effect, which typically requires a high voltage upto 90 kV to form a Taylor cone and for fiber formation [40][41][42] . A sphere shape profile creation on the electrospinning spinneret can reduce the applied voltage and produce fine fibers with minimum voltage 40 .…”

mentioning

confidence: 99%

A Novel Profiled Multi-Pin Electrospinning System for Nanofiber Production and Encapsulation of Nanoparticles into Nanofibers

Prabu

Dhurai²

2020

Sci Rep

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Electrospinning with various machine configurations is being used to produce polymer nanofibers with different rates of output. The use of polymers with high viscosity and the encapsulation of nanoparticles for achieving functionalities are some of the limitations of the existing methods. A profiled multi-pin electrospinning (PMES) setup is demonstrated in this work that overcomes the limitations in the needle and needleless electrospinning like needle clogging, particle settling, and uncontrolled/uneven Taylor cone formation, the requirement of very high voltage and uncontrolled distribution of nanoparticles in nanofibers. The key feature of the current setup is the use of profiled pin arrangement that aids in the formation of spherical shape polymer droplet and hence ensures uniform Taylor cone formation throughout the fiber production process. With a 10 wt% of Polyvinyl Alcohol (PVA) polymer solution and at an applied voltage of 30 kV, the production rate was observed as 1.690 g/h and average fiber diameter obtained was 160.5 ± 48.9 nm for PVA and 124.9 ± 49.8 nm for Cellulose acetate (CA) respectively. Moreover, the setup also provides the added advantage of using high viscosity polymer solutions in electrospinning. This approach is expected to increase the range of multifunctional electrospun nanofiber applications.

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“…The existence of the hysteresis phenomena might be connected to the fact that the ratios of the normal and the tangential electric forces are different in the mentioned cases (Morad, et al, 2016).…”

Section: Variable Physical Parametersmentioning

confidence: 99%

“…According to Morad, Rajabi, Razavi, and Pejman Sereshkeh (2016), the stable jet mode can be maintained in a greater voltage range for lower flow rates than for the higher ones because the stability of a stable jet decreases as the flow rate increases. Ku and Kim (2002) found that the standard deviation of the droplet diameter for a highly viscous liquid has a minimal value (i.e.…”

Section: Electrospray Modesmentioning

confidence: 99%

Review of electrospray observations and theory

Bošković

Bugarski

2018

J. eng. process. manag.

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While a liquid is dripping out of a capillary tube, there is a possibility to affect the characteristics of the exiting flow in certain ways. One of the ways already used is by introducing an electric field that can be used to change the average droplet diameter and the droplet size distribution. This process is called electrospraying, while the theory behind it is sometimes called electrohydrodynamics (EHD). This phenomenon has been investigated for more than a hundred years both empirically and theoretically. In this paper, a review of the available literature and the empirical and theoretical findings is presented. A new classification of the electrospray modes had to be given to include all the different modes mentioned by different authors. The necessary pieces of the equipment and their different types are also given.

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A Very Stable High Throughput Taylor Cone-jet in Electrohydrodynamics

Cited by 88 publications

References 45 publications

Design of polyurethane fibers: Relation between the spinning technique and the resulting fiber topology

Design of polyurethane fibers: Relation between the spinning technique and the resulting fiber topology

A Novel Profiled Multi-Pin Electrospinning System for Nanofiber Production and Encapsulation of Nanoparticles into Nanofibers

Review of electrospray observations and theory

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