scholarly journals Electrospinning process parameters dependent investigation of TiO2 nanofibers

2018 ◽  
Vol 11 ◽  
pp. 223-231 ◽  
Author(s):  
M.V. Someswararao ◽  
R.S. Dubey ◽  
P.S.V. Subbarao ◽  
Shyam Singh
Keyword(s):  
Process Parameters ◽  
Electrospinning Process ◽  
Tio2 Nanofibers

scholarly journals Effects of Electrospinning Parameters on the Microstructure of PVP/TiO2 Nanofibers

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1616
Author(s):  
Wan-Tae Kim ◽  
Dong-Cheol Park ◽  
Wan-Hee Yang ◽  
Churl-Hee Cho ◽  
Won-Youl Choi
Keyword(s):  
Process Parameters ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Low Cost ◽  
Fluid Velocity ◽  
Average Diameter ◽  
Electrospinning Process ◽  
Electrical And Optical Properties ◽  
Tio2 Nanofibers ◽  
The Many

Titanium dioxide has excellent chemical, electrical, and optical properties, as well as good chemical stability. For that reason, it is widely used in many fields of study and industry, such as photocatalysts, organic solar cells, sensors, dental implants, and other applications. Many nanostructures of TiO2 have been reported, and electrospinning is an efficient practical technique that has a low cost and high efficiency. In various studies on improving performance, the researchers created nanofibers with suitable microstructures by changing various properties and the many process parameters that can be controlled. In this study, PVP/TiO2 nanofibers were fabricated by the electrospinning process. The diameters of the nanofibers were controlled by various parameters. To understand the effects on the diameter of the nanofibers, various process parameters were controlled: the molecular weight and concentration of the polymers, deionized water, applied voltage, fluid velocity, and concentration of titanium precursor. The average diameter of the PVP nanofibers was controlled in a range of 42.3 nm to 633.0 nm. The average diameter of the PVP/TiO2 nanofibers was also controlled in a range of 63.5 nm to 186.0 nm after heat treatment.

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.

Optimization and physical performance evaluation of electrospun nanofibrous mats of PLA, PCL and their blends

2020 ◽  
pp. 152808372094450
Author(s):  
Deepika Sharma ◽  
Bhabani K Satapathy
Keyword(s):  
Physical Performance ◽  
Process Parameters ◽  
Optimization Technique ◽  
Electrospinning Process ◽  
Sequential Optimization ◽  
Orifice Diameter ◽  
Solvent Ratio ◽  
Solvent Mixtures ◽  
Minimum Diameter ◽  
Hierarchical Processing

The optimization of process parameters such as applied voltage, orifice diameter, solvent system, and solvent ratio for electrospinning of neat polymers, polylactic acid (PLA) and poly (є-caprolactone) (PCL), to obtain uniform, randomly oriented nanofibers with minimum diameter variation and beaded structures has been critically discussed. The paper focuses on establishing a sequential optimization technique for arriving at a common set of electrospinning process parameters for individual polymers, such as, applied voltages, orifice diameters, solvent mixtures, solvent ratios, to be used in the fabrication of electrospun nanofibrous mats (ENMs) of blended polymers. In this study, the effect of variation of applied voltages, orifice diameters, solvent mixtures, solvent ratios, PLA/PCL blending ratios, solution concentration of blends and flow rate were reported via morphological analysis of electrospun nanofibers. The set of optimal process parameters obtained for both PLA and PCL were adopted for the fabrication of ENMs based on the PLA/PCL blends. The paper further deliberates on the physical performance of PLA/PCL based ENMs in acidic, basic and neutral release media. Thus, the study establishes a hierarchical processing optimization route for designing blended ENMs by following a set of variable electrospinning process parameters.

Antibacterial Properties of Different Ratio Ce Doped TiO2 Nanofibers Prepared by Electrospinning Process

2018 ◽  
Vol 7 (5) ◽  
pp. 599-603
Author(s):  
Nalan Çiçek Bezir ◽  
Atilla Evcin ◽  
Emine Şenol ◽  
Burcu Özcan ◽  
Esengül Kır ◽  
...  
Keyword(s):  
Antibacterial Properties ◽  
Electrospinning Process ◽  
Tio2 Nanofibers ◽  
Doped Tio2

The Effect of Calcination Temperature on the Surface Evolution and Photocatalysis Activity of Co-Doped PVAc/TiO2 Composite Nanofibers

2011 ◽  
Vol 331 ◽  
pp. 14-18
Author(s):  
Ning Wu ◽  
Ya Nan Jiao ◽  
Zhi Qing Yuan ◽  
Yun Xing Liang ◽  
Li Chen
Keyword(s):  
Calcination Temperature ◽  
Composite Nanofibers ◽  
Sol Gel ◽  
Crystal Form ◽  
Electrospinning Process ◽  
Surface Evolution ◽  
Tio2 Nanofibers ◽  
X Ray ◽  
Surface Morphologies ◽  
Co Doped

The Fe3+,La3+ co-doped polyvinyl acetate(PVAc)/titanium dioxide(TiO2) composite nanofibers were firstly prepared by combining sol-gel method and electrospinning process, and then calcined under 300°Cand 600°C separately. The effect of calcination temperature on structures, surface morphologies, crystalline state, elemental composition and photocatalysis activity were characterized by scanning electron microscope (SEM), atomic force microscope (AFM), X-ray Diffraction (XRD) , energy dispersive X-ray spectroscopy (EDX) and ultraviolet-visible spectrophotometer(UV-Vis) respectively. The SEM and AFM images showed that the nanofibers were randomly distributed to form the fibrous web, the diameters and surface roughness of nanofibers were obviously changed as the calcination tempreture increasing. The EDX analysis and XRD spectra indicated the percentage of C,O,Ti elements varied as the increase of tempreture and the formation of anatase crystal form TiO2 nanofibers under 600°C.The UV-Vis curves revealed strong adsorption to methylene blue under 600°C calcination.

OPTIMIZATION OF ELECTROSPINNING PROCESS PARAMETERS FOR TISSUE ENGINEERING SCAFFOLDS

2006 ◽  
Vol 01 (02) ◽  
pp. 153-178 ◽  
Author(s):  
MING CHEN ◽  
PRABIR K. PATRA ◽  
STEVEN B. WARNER ◽  
SANKHA BHOWMICK
Keyword(s):  
Cell Growth ◽  
Process Parameters ◽  
Growth Kinetics ◽  
Fiber Diameter ◽  
Average Diameter ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Average Fiber Diameter ◽  
High Concentration ◽  
Cell Growth Kinetics

The goal of the current study was to optimize important process parameters for electrospinning polycaprolactone (PCL) for growing 3T3 fibroblasts. We hypothesized that the smallest obtainable fiber diameter would provide the best cell growth kinetics and we tested this hypothesis for three different process parameters: solution concentration, voltage and collector screen distance. Beaded structures were formed when using low concentration electrospinning solutions (8 wt% to 13 wt%), in which the viscosity ranged from 16.0 c P to 340.0 c P . In this concentration range, cell growth kinetics was impeded when using a high concentration of cells (8–10 × 105). Higher PCL concentration led to an increase in the average fiber diameter from 400 nm to 1600 nm when PCL solution concentration changed from 15 wt% to 20 wt%. Although, the mean values indicated that cell growth kinetics were higher at the lower end of the concentration (15% as opposed to 20%) and this correlated with lower average fiber diameter, the results in this range were not statistically significant (p > 0.05). The average fiber diameter of scaffolds first decreased and then increased when electrospinning voltage was increased. The cell growth kinetics demonstrated that smaller average diameter PCL fiber scaffolds had higher growth kinetics than larger average diameter scaffolds with the best conditions obtained at 15 KV. By increasing the screen distance, the average fiber diameter decreased but had no significant impact on cell growth kinetics. In summary, the optimal parametric space for 3T3 fibroblast growth for our studies was electrospinning a 15 wt% PCL solution using 15 kV voltage and a 25 cm collector distance.

Impact of electrospinning process parameters on the measured current and fiber diameter

2015 ◽  
Vol 55 (11) ◽  
pp. 2576-2582 ◽  
Author(s):  
Siavash Sarabi-Mianeji ◽  
Jennifer Scott ◽  
Danny J.Y.S. Pagé
Keyword(s):  
Process Parameters ◽  
Fiber Diameter ◽  
Electrospinning Process ◽  
Measured Current

scholarly journals Electrospinning of Cyclodextrin Nanofibers: The Effect of Process Parameters

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Fuat Topuz ◽  
Tamer Uyar
Keyword(s):  
Process Parameters ◽  
Flow Rate ◽  
High Performance ◽  
Fiber Diameter ◽  
Volume Ratio ◽  
Electrospinning Process ◽  
Electrical Field ◽  
Different Types ◽  
Solvent Systems ◽  
Needle Diameter

Cyclodextrin (CD) nanofibers have recently emerged as high-performance materials owing to their large surface area-to-volume ratio, along with the presence of high active CD content for their applications in drug delivery and water treatment. Even though there are several studies on the polymer-free electrospinning of CD molecules of different types, the effects of electrospinning process parameters on the morphology and diameter of the resultant fibers have not addressed yet. In this study, the influence of electrospinning process variables on the morphology and diameter of the resultant CD nanofibers is systematically studied using two different solvent systems, i.e., water and N, N-dimethylformamide (DMF). On adjusting the electrospinning process parameters (i.e., electrical field, flow rate, tip-to-collector distance (TCD), and needle diameter), uniform CD nanofibers could be produced from aqueous and DMF solutions. Generally, the electrospinning of thicker fibers was observed by increasing the applied voltage and flow rate due to higher mass flow. Increasing TCD boosted the fiber diameter. Likewise, the use of needles with larger diameters resulted in the electrospinning of thicker fibers from DMF solutions, which might be attributed to higher viscosity due to reduced shear rate.

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