Investigation of a New Needleless Electrospinning Method for the Production of Nanofibers

2013 ◽  
Vol 8 (4) ◽  
pp. 155892501300800 ◽  
Author(s):  
Deogratias Nurwaha ◽  
Wanli Han ◽  
Xinhou Wang
Keyword(s):  
Strong Interaction ◽  
Applied Voltage ◽  
Fiber Diameter ◽  
Electrospun Fiber ◽  
Scaling Up ◽  
Processing Parameters ◽  
Needleless Electrospinning ◽  
Electrospinning Method ◽  
Multiple Jets ◽  
Productivity Rate

This paper presents the possibility of nanofiber formation by a new multiple jet method. A novel needleless electrospinning apparatus was used to produce nanofibers. This employs a new design for supplying solution to a metal roller spinneret. The advantage of this setup is its ease of scaling-up for increased output. Using this new method it was possible to increase the nanofiber production rate because of the multiple jets. The productivity rate has been significantly enhanced and was 24–30 times higher than single needle electrospinning. It was also possible to produce thinner fibers than the single needle method. It was found that fibers produced by this novel needleless electrospinning had fewer beadings than fibers produced by the conventional electrospinning method. The effects of processing parameters including applied voltage and spinning electrospinning distance on eletrospun fiber diameter were also investigated. The study showed that the electrospun fiber diameter was strongly governed by the processing parameters. It was observed that there was a strong interaction between these parameters.

scholarly journals Multiple-Jet Needleless Electrospinning Approach via a Linear Flume Spinneret

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2052 ◽  
Author(s):  
Liang Wei ◽  
Chengkun Liu ◽  
Xue Mao ◽  
Jie Dong ◽  
Wei Fan ◽  
...  
Keyword(s):  
Process Parameters ◽  
Applied Voltage ◽  
Mass Production ◽  
Solution Concentration ◽  
Average Error ◽  
High Quality ◽  
Needleless Electrospinning ◽  
Nanofiber Diameter ◽  
Multiple Jets ◽  
Spinning Process

There is a great limitation to improving the quality and productivity of nanofibers through the conventional single-needle method. Using needleless electrospinning technology to generate multiple jets and enhance the productivity of nanofibers has attracted lots of interest for many years. This study develops a novel linear flume spinneret to fabricate nanofibers. Multiple jets with two rows can be formed simultaneously on the surface of the spinneret. The solution concentration has a significant impact on the average nanofiber diameter compared with applied voltage and collection distance. The effects of different spinning process parameters on the productivity of nanofibers are investigated. High-quality nanofibers with small nanofiber diameter and error can be fabricated successfully. The average nanofiber diameter is 108 ± 26 nm. The average error is 24%. The productivity of nanofibers can reach 4.85 ± 0.36 g/h, which is about 24 times more than that of the single-needle method. This novel linear flume spinneret needleless electrospinning technology exhibits huge potential for mass production of nanofibers in the field of industrialization.

Electrospinning of PVA/Carbon Nanotube Composite Nanofibers: The Effect of Processing Parameters

2008 ◽  
Vol 589 ◽  
pp. 221-226 ◽  
Author(s):  
Kolos Molnár ◽  
Eva Košt’áková ◽  
László Mészáros
Keyword(s):  
Carbon Nanotube ◽  
Composite Nanofibers ◽  
Lower Surface ◽  
Processing Parameters ◽  
Poly Vinyl Alcohol ◽  
Conductivity Measurements ◽  
Needleless Electrospinning ◽  
Electrospinning Method ◽  
Carbon Nanotube Composite ◽  
Scanning Electron

Poly(vinyl alcohol)/carbon nanotube (CNT) composite nanofibers were processed by both conventional and needleless electrospinning method. The effect of the processing parameters on the possibility of manufacturing was investigated. The results were evaluated by surface tension and conductivity measurements. For the investigation of surface morphology scanning electron microscopy (SEM) was used. It was concluded that surface treatment of carbon nanotubes was necessary for needleless electrospinning. Lower surface tensions were better for this process but the effect of conductivity was not so significant.

Development of Electrospun Shellac and Hydroxypropyl Cellulose Blended Nanofibers for Drug Carrier Application

2020 ◽  
Vol 859 ◽  
pp. 239-243
Author(s):  
Nawinda Chinatangkul ◽  
Sirikarn Pengon ◽  
Suchada Piriyaprasarth ◽  
Chutima Limmatvapirat ◽  
Sontaya Limmatvapirat
Keyword(s):  
Drug Delivery ◽  
Antimicrobial Agent ◽  
Flow Rate ◽  
Applied Voltage ◽  
Infusion Rate ◽  
Fiber Diameter ◽  
Electrospun Fiber ◽  
Drug Carrier ◽  
Hydroxypropyl Cellulose ◽  
Electrospinning Process

The aim of this study was to develop the electrospun shellac (SHL) and hydroxypropyl cellulose (HPC) blended nanofibers for drug carrier application. The effects of polymer solution and electrospinning parameters, including SHL-HPC ratio, HPC concentration, applied voltage and flow rate, on the appearance of fibers were investigated. Based on the results, electrospun fiber was not obtained when a solution of HPC alone was employed. However, the fibers would be obviously fabricated as SHL was added to the HPC solution. An increase in the SHL ratio in SHL-HPC blended solution could accordingly lead to a remarkable enhance in the fiber diameter. In addition, the continuous nanofibers with less beads were gradually formulated when the HPC concentration was increased. The electrospinning parameters seemed to be significant. The elevation of infusion rate from 0.5 to 1 mL/h would contribute to the preparation of thick fibers with the diameters enlarging from 666.9 to 843.5 nm. With the applied voltage increasing from 15 to 30 kV during the electrospinning process, the fabrication of small nanofibers with the diameters reducing from 843.5 to 741.6 nm would be conducted. In this study, monolaurin (ML), a broad antimicrobial agent, was encapsulated into the SHL-HPC carrier for the purpose of drug delivery application. Regarding the result, the loaded concentration of ML could not be enhanced by introducing HPC to the SHL fibers.

Fabrication and Characterization of Polycaprolactone (PCL)/Gelatin Electrospun Fibers

2014 ◽  
Vol 554 ◽  
pp. 52-56 ◽  
Author(s):  
Mim Mim Lim ◽  
Naznin Sultana ◽  
Azli Bin Yahya
Keyword(s):  
Fiber Diameter ◽  
Electrospun Fiber ◽  
Weight Ratio ◽  
Processing Parameters ◽  
Electrospun Fibers ◽  
Average Fiber Diameter ◽  
Polymer Blending ◽  
Electrospinning Technique ◽  
Sem Image

Over the past few decades, there has been considerable interest in developing electrospun fibers by using electrospinning technique for various applications. Polymer blending is one of the most effective methods in providing desired properties. In this study, synthetic polymer polycaprolactone (PCL) was blended together with natural polymer gelatin where both of them have different properties. It is done by using electrospinning technique. 10 %w/v and 14 %w/v PCL/gelatin electrospun fibers were successfully electrospun with different weight ratio. Processing parameters were set constant in this study and only solution parameters were altered. The optimized electrospun fiber formed was 14 %w/v PCL/gelatin 70:30 with average fiber diameter of 246.30 nm. No beaded fiber was formed in this scanning electron microscope (SEM) image. The result obtained also showed that by increasing the overall polymeric concentration of PCL/gelatin, average fiber diameter decreases. Fiber diameter was also found decreasing with the increase of the concentration of gelatin in the same concentratoin of PCL/gelatin blended electrospun fiber. Blending of PCL and gelatin in different weight ratio had provided different properties of electrospun fibers. It is believed that blended electrospun fibers can be used for biomedical applications.

Fundamental Study on Needleless Electrospinning Based on Metal (Card) Clothing

2013 ◽  
Vol 662 ◽  
pp. 103-107
Author(s):  
Yan Bo Liu ◽  
Ze Ru Zhang ◽  
Peng Cheng Li ◽  
Velmurugan Thavasi
Keyword(s):  
Theoretical Analysis ◽  
Polyvinyl Alcohol ◽  
Scaling Up ◽  
Electrospinning Process ◽  
Experimental Results ◽  
Fundamental Study ◽  
Needleless Electrospinning ◽  
Electrospinning Method ◽  
New Process ◽  
Different Types

This paper discloses a method for producing nanofibers by a needleless electrospinning process based on the metal (card) clothing. 20% w/w polyvinyl alcohol (PVA) solution was employed to demonstrate the feasibility of this new electrospinning technology. Different types of metal clothing were used to produce PVA nanofibers under different voltages in the experiments; theoretical analysis of this new electrospinning method was also carried out to understand the experimental results. The results indicated the great potential for scaling up this new avenue for producing nanofibers through electrospinning, especially when medium sized clothing was used in the new process.

A Modified Bubble Electrospinning for Fabrication of Nanofibers

2013 ◽  
Vol 23 ◽  
pp. 125-128 ◽  
Author(s):  
Hai Yan Kong ◽  
Ji Huan He
Keyword(s):  
Polymer Solution ◽  
Applied Voltage ◽  
Liquid Membrane ◽  
Fiber Diameter ◽  
New Method ◽  
Metal Ring ◽  
Polymer Liquid ◽  
Multiple Jets ◽  
Electronic Field

This paper suggests a new method for fabrication of nanofibers with polymer liquid membrane, which is produced by a metal ring rotating through the polymer solution. The thickness of the produced membrane is thin and suitable for nanomaterial fabrication. In this paper the membrane is to form a polymer bubble by blowing air under the presence of a high electronic field, and multiple jets eject when the bubble is ruptured. The effect of applied voltage on the fiber diameter is studied.

Study on Needle and Needleless Electrospinning for Nanofibers

2013 ◽  
Vol 750-752 ◽  
pp. 276-279 ◽  
Author(s):  
Wan Jun Liu ◽  
Hai Feng Zhang ◽  
Da Wei Li ◽  
Chen Huang ◽  
Xiang Yu Jin
Keyword(s):  
Stainless Steel ◽  
Polyvinyl Alcohol ◽  
Applied Voltage ◽  
Large Scale ◽  
Fiber Diameter ◽  
Water Solution ◽  
Electrospun Nanofibers ◽  
Diameter Distribution ◽  
Spiral Coil ◽  
Needleless Electrospinning

Polyvinyl alcohol (PVA) water solution was electrospun by both needle electrospinning and needleless electrospinning. The electrodes for needless electrospinning were rotary spiral disk and spiral coil made from stainless steel. We found that needleless electrospinning can obtain nanofibers in large-scale, while fiber diameter and diameter distribution were larger when compared to the conventional needle electrospinning. The average diameters of disk electrospun and coil electrospun nanofibers were 441±99nm and 415±103nm respectively. As for needle electrospun nanofibers, the diameters were 393±29nm and 349±25nm when the applied voltage were 10kV and 15kV respectively.

scholarly journals Process Optimization of PVDF Piezoelectric Nanofiber Production via Electrospinning

2021 ◽  
Vol 13 (1) ◽  
pp. 1-13
Author(s):  
Attila Levente Gergely ◽  
József Kántor
Keyword(s):  
Experimental Design ◽  
Process Optimization ◽  
Process Parameters ◽  
Flow Rate ◽  
Significant Influence ◽  
Vinylidene Fluoride ◽  
Fiber Diameter ◽  
Processing Parameters ◽  
Electrospinning Method ◽  
Poly Vinylidene Fluoride

Abstract The aim of this work was to investigate the effect of processing parameters of the electrospinning method on the resulting poly (vinylidene fluoride) (PVDF) fiber diameter. A three factorial Box-Behnken experimental design was employed to study the influence of applied voltage, the capillary-to-collector distance and the applied flow rate on the resulting fiber diameter. We successfully prepared bead-free PVDF nanofibers with fiber diameters ranging from 510-1300 nm. The experimental design analysis did not show significant influence of the studied process parameters under the used boundary conditions on the fiber diameter, thus indicating the robustness of the process.

scholarly journals Needleless Electrospinning of Uniform Nanofibers Using Spiral Coil Spinnerets

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Xin Wang ◽  
Haitao Niu ◽  
Xungai Wang ◽  
Tong Lin
Keyword(s):  
Electric Field ◽  
Production Rate ◽  
Applied Voltage ◽  
Fiber Diameter ◽  
Wire Diameter ◽  
Minor Effect ◽  
Electrospinning Technique ◽  
Fiber Production ◽  
Needleless Electrospinning ◽  
Coil Diameter

Polyvinyl alcohol nanofibers were prepared by a needleless electrospinning technique using a rotating spiral wire coil as spinneret. The influences of coil dimension (e.g., coil length, coil diameter, spiral distance, and wire diameter) and operating parameters (e.g., applied voltage and spinning distance) on electrospinning process, nanofiber diameter, and fiber productivity were examined. It was found that the coil dimension had a considerable influence on the nanofiber production rate, but minor effect on the fiber diameter. The fiber production rate increased with the increased coil length or coil diameter, or the reduced spiral distance or wire diameter. Higher applied voltage or shorter collecting distance also improved the fiber production rate but had little influence on the fiber diameter. Compared with the conventional needle electrospinning, the coil electrospinning produced finer fibers with a narrower diameter distribution. A finite element method was used to analyze the electric field on the coil surface and in electrospinning zone. It was revealed that the high electric field intensity was concentrated on the coil surface, and the intensity was highly dependent on the coil dimension, which can be used to explain the electrospinning performances of coils. In addition, PAN nanofibers were prepared using the same needleless electrospinning technique to verify the improvement in productivity.

scholarly journals Optimization of Electrospun Poly(caprolactone) Fiber Diameter for Vascular Scaffolds to Maximize Smooth Muscle Cell Infiltration and Phenotype Modulation

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 643 ◽  
Author(s):  
Dae Geun Han ◽  
Chi Bum Ahn ◽  
Ji-Hyun Lee ◽  
Yongsung Hwang ◽  
Joo Hyun Kim ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Smooth Muscle Cell ◽  
Muscle Cell ◽  
Fiber Diameter ◽  
Electrospun Fiber ◽  
Electrospun Nanofibers ◽  
Macrophage Infiltration ◽  
Vsmc Proliferation ◽  
Vascular Scaffolds ◽  
Poly Caprolactone

Due to the morphological resemblance between the electrospun nanofibers and extracellular matrix (ECM), electrospun fibers have been widely used to fabricate scaffolds for tissue regeneration. Relationships between scaffold morphologies and cells are cell type dependent. In this study, we sought to determine an optimum electrospun fiber diameter for human vascular smooth muscle cell (VSMC) regeneration in vascular scaffolds. Scaffolds were produced using poly(caprolactone) (PCL) electrospun fiber diameters of 0.5, 0.7, 1, 2, 2.5, 5, 7 or 10 μm, and VSMC survivals, proliferations, infiltrations, and phenotypes were recorded after culturing cells on these scaffolds for one, four, seven, or 10 days. VSMC phenotypes and macrophage infiltrations into scaffolds were evaluated by implanting scaffolds subcutaneously in a mouse for seven, 14, or 28 days. We found that human VSMC survival was not dependent on the electrospun fiber diameter. In summary, increasing fiber diameter reduced VSMC proliferation, increased VSMC infiltration and increased macrophage infiltration and activation. Our results indicate that electrospun PCL fiber diameters of 7 or 10 µm are optimum in terms of VSMC infiltration and macrophage infiltration and activation, albeit at the expense of VSMC proliferation.

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