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.

Using Orthogonal Design in Optimizing Parameters for Bubble Electrospinning of Polyvinyl Alcohol (PVA) Nanofibers

2010 ◽  
Vol 29-32 ◽  
pp. 1943-1947 ◽  
Author(s):  
Liang Dong ◽  
Wan Shou ◽  
Yong Liu ◽  
Rui Wang ◽  
Ru Dong Chen
Keyword(s):  
Polyvinyl Alcohol ◽  
Process Parameters ◽  
Applied Voltage ◽  
Orthogonal Design ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Electrospinning Technique ◽  
Array Design ◽  
Nanofiber Diameter ◽  
Lower Medium

The present work was aimed at studying the effects of process parameters on morphologies of Polyvinyl alcohol (PVA) nanofibers in a novel electrospinning technique, bubble electrospinning. The process was optimized by constructing L 9(34) orthogonal experimental array design. Three factors were investigated and nine tests were run under lower, medium and higher levels of these factors. The results showed that PVA solution concentration plays an important role in affecting the morphologies of PVA nanofibers in bubble electrospinning process. With the increase of the concentration of PVA solution, the morphologies of fibers were changed from beaded fibers to uniform cylinder fibers and the average nanofiber diameter also increased. The optimization process was 12w% for PVA solution, 30kV for applied voltage and 10cm for spinning distance.

scholarly journals Mass production of high-quality nanofibers via constructing pre-Taylor cones with high curvature on needleless electrospinning

2021 ◽  
Vol 197 ◽  
pp. 109247
Author(s):  
Jian Xiong ◽  
Ye Liu ◽  
Ailin Li ◽  
Liang Wei ◽  
Liming Wang ◽  
...  
Keyword(s):  
Mass Production ◽  
High Quality ◽  
Needleless Electrospinning

Morphological/alignment properties of thermoplastic polyurethane nanofiber affected by processing parameters

2020 ◽  
pp. 009524432096984
Author(s):  
Erdem Selver ◽  
Neslihan Karaca ◽  
Aysen Onen ◽  
Nuray Ucar ◽  
Pelin Altay
Keyword(s):  
Process Parameters ◽  
Biomedical Applications ◽  
Thermoplastic Polyurethane ◽  
Processing Parameters ◽  
Morphological Properties ◽  
Feeding Rates ◽  
Widespread Application ◽  
Nanofiber Diameter ◽  
Porous Surfaces ◽  
Spinning Process

Thermoplastic polyurethane (TPU) in nanofiber or submicron fiber has widespread application areas including the biomedical applications, such as artificial vein, cell cultivation etc. due to both TPU’s and nanofiber’s morphological properties. The morphology and aligment of nanofibers obtained from electrospinning are significantly affected by process parameters, which affect their end uses. This study aims to investigate the effect of process parameters of electrospinning (nozzle axis type, collector type, collector speed and filler types) on morphological properties (fiber orientation, fiber diameter and porous structure) of thermoplastic polyurethanes. Experimental results showed that nanofiber diameter increased with an increase of collector speed due to the relaxation of extensible TPU nanofiber after spinning process. When the rotational speed of collector reaches to 2000 rpm, the orientation could be observed. Using rotational wire collector resulted in thinner and more oriented fibers compared to rotating cylinder collector. Adding salt particles results in thinnest and highly oriented nanofiber webs. Higly porous surfaces were obtained using coaxial technique at the same feeding rates with miscible solvents for both shell and core. It was seen that using solvent with low boiling point in core may lead to higher porous surfaces. Nanofiber diameter increased using coaxial nozzle instead of single axis nozzle.

scholarly journals Enhancing Multiple Jets in Electrospinning: The Role of Auxiliary Electrode

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 768 ◽  
Author(s):  
Yu-Ke Wu ◽  
Zong-Jie Li ◽  
Jie Fan ◽  
Zhao-Peng Xia ◽  
Yong Liu
Keyword(s):  
Applied Voltage ◽  
Electric Field Intensity ◽  
Deep Understanding ◽  
Vertical Position ◽  
Auxiliary Electrode ◽  
Injection Speed ◽  
Nanofiber Diameter ◽  
Multiple Jets ◽  
Simulation Results

An auxiliary electrode introduced in traditional spinneret electrospinning is an effective and powerful technique to improve the production rate of nanofibers. In this work, the effects of the arrangement of auxiliary electrode, applied voltage, injection speed, and the distance between the electrode tip and the spinneret tip (ESD) on the jet number and the morphology of polyvinyl alcohol (PVA) nanofibers were investigated systematically. The results showed that the number of jets firstly increased and then decreased with the increase of applied voltage and ESD, respectively, while increasing with the injection speed in both the auxiliary electrode in the vertical position and parallel position. The average nanofiber diameter decreased with increasing of applied voltage and injection speed, but decreasing in ESD in these two positions. The numerical simulation results revealed that the auxiliary electrode primarily influenced the electric field intensity in the spinning area. This work provides a deep understanding of multiple jets in electrospinning.

Preparation of Chitosan based Nanofibers: Optimization and Modeling

2016 ◽  
Vol 14 (1) ◽  
pp. 283-288 ◽  
Author(s):  
K. Thirugnanasambandham ◽  
V. Sivakumar
Keyword(s):  
Polymer Solution ◽  
Response Surface ◽  
Applied Voltage ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Interactive Effects ◽  
Optimum Process ◽  
Process Conditions ◽  
Good Correspondence ◽  
Nanofiber Diameter

AbstractThe main objective of the present study is to prepare a chitosan based nanofiber and model the electrospinning process using response surface methodology (RSM). The electrospinning parameters such as collector distance, polymer solution concentration and applied voltage were optimized by using three-variable-three-level Box–Behnken design (BBD). Based on RSM analysis, second order polynomial equation was formed and it indicated good correspondence between experimental and predicted values. 3D response surface plots were used to study the individual and interactive effects of process variables on chitosan based nanofiber diameter. The optimum process conditions for the minimum chitosan based nanofiber diameter (0.3 µm) were found to be collector distance of 12 cm, polymer solution concentration of 25% and applied voltage of 6 kV.

Fabricated narrow diameter distribution nanofiber for an air filtration membrane using a double rings slit spinneret

2018 ◽  
Vol 89 (6) ◽  
pp. 936-947 ◽  
Author(s):  
Liang Wei ◽  
Hongnan Zhang ◽  
Xiaohong Qin
Keyword(s):  
Pore Diameter ◽  
Solution Concentration ◽  
Diameter Distribution ◽  
Metal Ring ◽  
Air Filtration ◽  
Nanofiber Diameter ◽  
Spinning Process ◽  
Nanofiber Membranes ◽  
Filtration Properties ◽  
Narrow Diameter Distribution

A needleless electrospinning setup called “Needleless Double Rings Slit Electrospinning” was proposed for the first time. The control pump transports solution to the double rings slits through an insulated infusion tube. High voltage is applied to the metal ring and electric force exceeds the surface tension and viscosity, and multiple jets are spontaneously formed on the top of solution surface. Different spinning process parameters, including solution concentration, applied voltage, collection distance and spinning time, have an influence on nanofiber diameter distribution. The morphology of nanofibers has been observed using scanning electron microscopy. It is worth noting that narrow diameter distribution nanofibers have been fabricated using a novel double rings slit spinneret. Nanofiber diameter distribution has determined the mean pore diameter, pore diameter distribution, filtration efficiency and filtration resistance. The final results show that the pore size and filtration property for nanofiber membranes are significantly related with nanofiber diameter distribution. Narrow diameter nanofibers have contributed to the improvement of filtration properties for nanofiber membranes.

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.

Processing Flax/ Bemberg/ Bamboo Charcoal Fiber Blended Yarn

2011 ◽  
Vol 332-334 ◽  
pp. 630-633
Author(s):  
Ying Sun
Keyword(s):  
Process Parameters ◽  
Raw Materials ◽  
Knitted Fabric ◽  
Bamboo Charcoal ◽  
High Quality ◽  
High Count ◽  
Rotor Spinning ◽  
Optimization Of Process Parameters ◽  
Spinning Process ◽  
Selection Of

In order to obtain the lightweight and high quality flax class knitted fabric, Spins the high-count flax class knitting gauze are solves the question key . This thesis from the Spinning and Selection of raw materials, The teclmology of the high quality blended knitting yarn of flax fiber / bemberg fiber/bamboo charcoal fiber were manufactured by rotor spinning process, is diseussedin ,and through the comparison of different options for the optimization of process parameters the optimization of process parameters.

Effect of Applied Voltage on Polymer Aggregation in Electrospraying of Thermoplastic Polymer

2012 ◽  
Vol 535-537 ◽  
pp. 2522-2525 ◽  
Author(s):  
Amit Jadhav ◽  
Li Jing Wang ◽  
Rajiv Padhye
Keyword(s):  
Process Parameters ◽  
Flow Rate ◽  
Applied Voltage ◽  
Solution Concentration ◽  
Solution Flow Rate ◽  
Thermoplastic Polymer ◽  
Solution Flow ◽  
Polymer Liquids ◽  
Polymeric Solutions ◽  
Uniform Droplets

In an electrospraying process, the polymer solution interacts with the electric field. Charged polymeric solutions causing polymer liquids to move, break into drops or spray into fine droplets. Electrospraying has the ability to generate very small & uniform droplets of polymeric solution. It is envisaged that electrospraying is a promising technology to coat a polymer on surface at submicron range. The polymer aggregation is important while coating. The process parameters including applied voltage, nozzle-collector distance, solution flow rate, and solution concentration play an important role in polymer droplets aggregation on surface. This research paper investigates the effect of applied voltage on aggregation of polymer droplets.

Rapid and scalable production of high-quality phosphorene by plasma–liquid technology

2020 ◽  
Vol 56 (2) ◽  
pp. 221-224 ◽  
Author(s):  
Hao Huang ◽  
Ming Gao ◽  
Yihong Kang ◽  
Jia Li ◽  
Jiahong Wang ◽  
...  
Keyword(s):  
Mass Production ◽  
High Quality ◽  
Scalable Production

A facile plasma–liquid technique is designed and demonstrated for rapid and mass production of few-layered phosphorene.

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