Self-organisation of multiple jets in near-field electrospinning process

2012 ◽  
Vol 7 (11) ◽  
pp. 1088-1091 ◽  
Author(s):  
Yiin-Kuen Fuh ◽  
Li-Chih Lien
Keyword(s):  
Near Field ◽  
Electrospinning Process ◽  
Multiple Jets ◽  
Self Organisation

scholarly journals Accurate fabrication of aligned nanofibers via a double-nozzle near-field electrospinning

2019 ◽  
Vol 23 (4) ◽  
pp. 2143-2150 ◽  
Author(s):  
Guojie Xu ◽  
Han Wang ◽  
Zhifeng Wang ◽  
Jiarong Zhang ◽  
Rouxi Chen ◽  
...  
Keyword(s):  
Energy Harvester ◽  
Near Field ◽  
Wearable Sensors ◽  
Electrospinning Process ◽  
High Tech ◽  
Direct Write ◽  
Large Area ◽  
Aligned Nanofibers ◽  
Aligned Fibers ◽  
Key Factor

The near-field electrospinning is considered as one of the most effective techniques to direct-write aligned fibers which can be applied to various high-tech areas, including energy harvester, tissue engineering, and wearable sensors. For large area aligned pattern printing, the multi-nozzle electrohydrodynamic print-ing is an efficient method to enhance productivity. As a branch of electrohydro-dynamic printing technology, the near-field electrospinning is a crucial concern to make an investigation for the formation of aligned nanofibers. Here we fabricated various nanostructures from beaded fibers to aligned fibers and crimped fibers by the double-nozzle near-field electrospinning process. We found three key parameters affecting the process, including the collector speed, the applied voltage, and the electrode-to-collector distance, and the collector speed is the key factor affecting the crimped frequency. This paper provides a reliable experi-mental basis and theoretical guidance for the multi-nozzle near-field electrospin-ning to accurately direct-write microfibers and nanofibers.

Numerical Simulation of Viscous Jet for Near-Field Electrospinning

2009 ◽  
Vol 60-61 ◽  
pp. 465-469 ◽  
Author(s):  
Yuan Yuan Zhong ◽  
Gao Feng Zheng ◽  
Dao Heng Sun
Keyword(s):  
Numerical Simulation ◽  
Field Strength ◽  
Process Parameters ◽  
Near Field ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Substrate Distance ◽  
Viscous Jet ◽  
Set Up ◽  
The Impact

Near-Field Electrospinning (NFES) is a newly developed method to fabricate continuous and ordered solid nanofibers, with smaller spinneret-to-collector-distance the behavior of viscous jet would play a more prominent effect on the deposition and morphology of nanofiber. In this paper, a 2-dimentional physical model based on electrohydrodynamics and rheology was set up to discuss the morphology of viscous jet for NFES. The profile of the jet along z direction can be predicted by this model, and the impact of process parameters on the jet radius is analyzed. Radius of jet decreases with spinneret-to-substrate-distance decreasing; jet radius decreases with applied voltage and electric field strength increasing; jet electrospun from PEO solution is thinner than that from PVA solution with the same solution concentration; solution concentration has insignificant influence on the radius of jet from solution of the same polymer (PVA or PEO). This numerical simulation would improve the control of electrospinning process in NFES.

Experimental Investigation on the Multiple Jets from a Single Droplet by Electrospinning

2010 ◽  
Vol 129-131 ◽  
pp. 365-369 ◽  
Author(s):  
Cheng Kun Liu ◽  
Mei Yu Chen ◽  
Run Jun Sun ◽  
Wei Hua Zhang ◽  
Zhao Huan Zhang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Speed ◽  
Great Increase ◽  
Shape Change ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Process Conditions ◽  
Single Droplet ◽  
Interesting Phenomenon ◽  
Multiple Jets

In electrospinning, outlook of fibrous assembly changes not only with the variation of collecting setups, but with the electrospinning process. For example, formation of multiple jets on a single droplet at special electrospinning conditions can produce several regions of fibrous webs simultaneously, which is bound to bring a great increase of production of nanofibers. The initiation method of multiple jets during electrospinning was derived through an experimental investigation by means of a high-speed camera, which was used to obtain the information of the shape change of a droplet along with process conditions, such as solution concentration, voltage and flow rate. Results showed that multiple jets could be initiated in a controlled manner when droplets experienced several cycles of dripping at relatively high voltages and flow rates in a certain concentration range. An interesting phenomenon of the auto-initiation of double jets was further observed in our experiment.

scholarly journals Fibers and Conductive Films Using Silver Nanoparticles and Nanowires by Near-Field Electrospinning Process

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Cheng-Tang Pan ◽  
Tsung-Lin Yang ◽  
Yi-Chian Chen ◽  
Cherng-Yuh Su ◽  
Shin-Pon Ju ◽  
...  
Keyword(s):  
Thin Films ◽  
Silver Nanoparticles ◽  
Sheet Resistance ◽  
Silver Nanowires ◽  
Near Field ◽  
Electrospinning Process ◽  
Conductive Films ◽  
Conductive Film ◽  
The Future ◽  
Transparent Conductive Electrodes

The silver nanowires (AgNWs) and silver nanoparticles (AgNPs) were synthesized. With near-field electrospinning (NFES) process, fibers and thin films with AgNPs and AgNWs were fabricated. In the NFES process, 10 k voltage was applied and the AgNPs and AgNWs fibers can be directly orderly collected without breaking and bending. Then, the characteristics of the fibers were analyzed by four-point probe and EDS. The conductive film was analyzed. When the thickness of films with AgNWs and AgNPs was 1.6 µm, the sheet resistance of films was 0.032 Ω/sq which was superior to that of the commercial ITO. The transmissivity of films was analyzed. The transmissivity was inversely proportional to sheet resistance of the films. In the future, the fibers and films can be used as transparent conductive electrodes.

scholarly journals Bacteriophage nanofiber fabrication using near field electrospinning

RSC Advances ◽  
2019 ◽  
Vol 9 (67) ◽  
pp. 39111-39118
Author(s):  
Ryota Sugimoto ◽  
Ju Hun Lee ◽  
Ju-Hyuck Lee ◽  
Hyo-Eon Jin ◽  
So Young Yoo ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Near Field ◽  
Electrospinning Process ◽  
Crystalline Suspension

Using liquid crystalline suspension of the phage, we successfully fabricated nano- and microscale pure phage fibers. Through a near field electrospinning process, we fabricated the desired phage fiber pattern with tunable direction and spacing.

Residual Charges during Electrospinning Assist in Formation of Piezoelectricity in Poly(Vinylidene Fluoride-co-Trifluoroethylene) Nanofibers

2015 ◽  
Vol 37 ◽  
pp. 13-19 ◽  
Author(s):  
A Young Choi ◽  
Hyeon Jun Sim ◽  
Min Kyoon Shin ◽  
Seon Jeong Kim ◽  
Youn Tae Kim
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Vinylidene Fluoride ◽  
Near Field ◽  
Electrospun Nanofibers ◽  
Electrospinning Process ◽  
Local Electric Field ◽  
Output Measurement ◽  
Poly Vinylidene Fluoride

We confirm piezoelectric performance of bottom electrospun PVDF-TrFE mat is higher than that of top mat and report the mechanism of additional poling process of electrospun nanofibers by local electric field which is originating from residual charges in far-field electrospinning process. Piezoelectric output measurement of poly (vinylidene fluoride-co-trifluoroethylene) electrospun nanofibers was performed by push test and output signals of bottom and top were compared. The local electric field strength calculated by simulation was higher than reported electric field strength of near-field electrospinning (10 MV/m). It can be concluded that the piezoelectric outputs of electrospun nanofibers tend to be improved by residual charge density and electrospinning condition.

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