Effect of Electrospinning Process on Electrospun Chlorinated Polyvinyl Chloride (CPVC) Nanofibers

2014 ◽  
Vol 633-634 ◽  
pp. 11-14 ◽  
Author(s):  
Xiu Li Cai ◽  
Ting Ting Jiang ◽  
Chun Mei Qiao ◽  
Bo Wen Cheng ◽  
Wei Min Kang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Polyvinyl Chloride ◽  
Applied Voltage ◽  
Electrospinning Process ◽  
Nanofiber Membrane ◽  
Fiber Morphology ◽  
Extrusion Rate ◽  
Scanning Electron

This work focuses on preparations of CPVC nanofibers by the electrospinning. The effects of the applied voltage, the capillary and collector distance and the extrusion rate on the fiber morphology were analyzed. The morphology of the fiber was examined by scanning electron microscopy. The results indicates that when the applied voltage is 26 KV, the extrusion rate of CPVC is 0.2 ml/h and the the Capillary and Collector Distance is 15 cm, the CPVC nanofiber membrane is optimal.

Morphology of Biodegradable Poly(hexamethylene Adipate)(PHMA) Nanofibers Prepared by Electrospinning

2009 ◽  
Vol 87-88 ◽  
pp. 555-560
Author(s):  
Wei Min Kang ◽  
Bo Wen Cheng ◽  
Quan Xiang Li ◽  
Xu Pin Zhuang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Flow Rate ◽  
Applied Voltage ◽  
Mixed Solvent ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Solvent Ratio ◽  
Biodegradable Poly ◽  
Scanning Electron

A kind of novel biodegradable poly(hexamethylene adipate) (PHMA) nanofibers with diameter of 100～700nm using a mixed solvent of 1,2-dichloroethane (DCE ) and trifluoroacetic acid (TFA) were obtained by electrospinning process in this paper. The morphology of electropun PHMA nanofibers were investigated by scanning electron microscopy (SEM). The results showed that the morphology, diameter and uniformity of the fibers were influenced by solvent ratio, solution concentration, applied voltage, capillary–screen distance and flow rate greatly. The finer and uniform nanofibers were electrospun from a mixed solvent of DCE and TFA with ratio of 70/30(w/w).

Adsorption Characteristics of Polyvinyl Chloride Fiber in Purification of Groundwater

2014 ◽  
Vol 955-959 ◽  
pp. 3279-3282
Author(s):  
Yi Min Sang
Keyword(s):  
Electron Microscopy ◽  
Polyvinyl Chloride ◽  
Adsorption Equilibrium ◽  
Electrospinning Process ◽  
Divalent Metal ◽  
Nanofiber Membrane ◽  
Equilibrium Time ◽  
Divalent Metal Cations ◽  
Simulated Groundwater ◽  
Scanning Electron

The morphology, interspace of a novel nanofiber membrane are characterized by scanning electron microscopy (SEM). The membrane, named M-1, is prepared from chloridized polyvinyl chloride by high-voltage electrospinning process. The removals of divalent metal cations including Cu2+, Pb2+and Cd2+from the simulated groundwater by M-1 have been investigated. From static adsorption experiments, maximum uptakes of Cu2+, Cd2+, Pb2+and their adsorption equilibrium time have been obtained respectively in the simulated groundwater.

The Effect of Electrospinning Parameters on Mophology of PAN/PU Composite Nanofibers

2011 ◽  
Vol 332-334 ◽  
pp. 1343-1346
Author(s):  
Jie Shi ◽  
Di Jia ◽  
Bo Wen Cheng ◽  
Wei Min Kang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Composite Nanofibers ◽  
Nanofiber Membrane ◽  
Fiber Morphology ◽  
Experimental Conditions ◽  
Jet Velocity ◽  
Scanning Electron

The PAN/PU nanofiber membrane was prepared by twin-jet electrospinning. By changing the spinning voltage, solidification distance and jet velocity, the effects of each parameter on the fiber morphology could be analyzed. The diameter of the fiber was examined by scanning electron microscopy. The result showed that the excellent product could be got under such experimental conditions, which were 10%PAN and 10%PU solution, 25KV voltage, 15cm solidification distance with the jet velocity of 0.8ml/h and 1.3ml/h.

Preparation of Polyacrylamide Nanofibers by Electrospinning

2009 ◽  
Vol 87-88 ◽  
pp. 433-438 ◽  
Author(s):  
Li Liu ◽  
Wei Wei Gu ◽  
Wen Ting Xv ◽  
Chang Fa Xiao
Keyword(s):  
Electron Microscopy ◽  
Molecular Weight ◽  
Scanning Electron Microscopy ◽  
Applied Voltage ◽  
Diameter Distribution ◽  
Uniform Thickness ◽  
Technological Parameters ◽  
Glutaraldehyde Solution ◽  
Scanning Electron

Polyacrylamide (PAM) nanofibers was spun by electrospinning. In order to increase the molecular weight of the PAM, It has been cross linked by Glutaraldehyde solution. By means of scanning electron microscopy (SEM), the effect of electrospun technological parameters on the fibers’ morphology were researched. The parameters include the concentration of PAM spinning solution, the applied voltage and tip-collector distance (TCD). The PAM nanofibers of uniform thickness with the fibers’ diameter distribution of 80 ~ 160nm were got under the conditions as followers: the concentration of 16 wt.%, applied voltage of 23 kV, the TCD of 13cm.

Study on PS-Molybdophosphoric Composite Fibers via Electrospinning Process

2013 ◽  
Vol 750-752 ◽  
pp. 311-314
Author(s):  
Zhi Ming Zhang ◽  
Ting Ting Li ◽  
Jie Cao ◽  
He Ti Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Composite Membrane ◽  
Hot Pressing ◽  
Electrospinning Process ◽  
Molybdophosphoric Acid ◽  
Composite Fibers ◽  
Cold Pressing ◽  
Scanning Electron

Fine polystyrene fibers have been generated from electrospinning of PS/molybdophosphoric acid in THF and DMF solution. The fiber diameters ranged from 500 nm and increased by adjusting the volume of DMF, the amount of the PS/ molybdophosphoric acid and spinning voltage, the size of the distance. Surface morphology of the nanofibers was characterized by scanning electron microscopy (SEM). The fibers generated from the solutions were more homogeneous in sizes, especially when more THF was added. With the phosphomolybdate amount of increase in untreated, cold pressing, hot pressing modulus showed a trend to decrease. The infrared results show that the composite membrane contains four phosphomolybdate absorption peaks, which is consistent with the predicted results.

scholarly journals TAYLOR CONE–JET MODE IN THE FABRICATION OF ELECTROSPRAYED MICROSPHERES

2018 ◽  
Vol 55 (1B) ◽  
pp. 216 ◽  
Author(s):  
Viet Linh Nguyen - Vu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Polymer Solution ◽  
Flow Rate ◽  
Applied Voltage ◽  
Processing Parameters ◽  
Taylor Cone ◽  
Sem Micrographs ◽  
Scanning Electron

In this study, electrospray modes were investigated to clarify their effects on the morphology and size of polycaprolactone (PCL) particles. The result indicated that electrosprayed microspheres with homogeneous and stable morphology were fabricated by using cone–jet mode and suitable electrospray processing parameters. Besides, the PCL solution was created by dissolving in dichloromethane with different concentrations such as 3.5%, 4%, 4.5% and 5%. The scanning electron microscopy (SEM) micrographs pointed that electrosprayed PCL microspheres were formed by using 4.5 % polymer solution. In addition, the reproducible and homogeneous morphology of PCL microparticles were obtained at the following set of parameters: applied voltage of 18 kV, flow rate of 1.5 mL/h and distance tip to collector of 20 cm. Moreover, at the collecting distance of 15–25 cm, the flow rate of 1.2–1.8 mL/h and applied voltage of 18 kV the cone–jet mode was generated. It was an effective electrospray mode to create stable and homogeneous microspheres.

Surface Morphology of Polyvinyl Chloride and Silicone Elastomer Umbilical Artery Catheters by Scanning Electron Microscopy

PEDIATRICS ◽  
1978 ◽  
Vol 62 (5) ◽  
pp. 702-705
Author(s):  
C. C. Clawson ◽  
Stephen J. Boros
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Polyvinyl Chloride ◽  
Umbilical Artery ◽  
Silicone Elastomer ◽  
X Ray ◽  
Surface Features ◽  
Scanning Electron

The surface features of a new siliconmer elastomer umbilical artery catheter have been defined by scanning electron microscopy and compared with those of a standard polyvinyl chloride catheter. Little difference was noted in the surfaces of the catheter materials themselves, but the radiopaque material used to render the catheters visible by x-ray resulted in a considerable difference in the overall smoothness. The polyvinyl chloride catheter's marker was in the form of a wide, rough band extending the length of the tubing whereas the marker particles of the silicone elastomer were dispersed, more uniform in size, and resulted in less overall irregularity of the surface.

Synthesis of Highly Ordered Nanotubular Oxide Layers on Ti-6Al-4V Alloys by Anodization Technique

2011 ◽  
Vol 219-220 ◽  
pp. 1541-1544
Author(s):  
Shi Kai Liu ◽  
Hong Sen Zuo ◽  
Hai Bin Yang ◽  
Wen Jun Zou ◽  
Zheng Xin Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Applied Voltage ◽  
Electrochemical Anodization ◽  
Tube Length ◽  
Nanotube Arrays ◽  
Anodization Time ◽  
Tc4 Alloy ◽  
Inner Diameter ◽  
Scanning Electron

Highly ordered nanotube arrays were fabricated via electrochemical anodization of Ti-6Al-4V (TC4) alloy foils in aqueous fluorine containing electrolytes. The formation of ordered nanotubular films was affected by the applied anodization potential and the anodization time. The optimal applied voltage and anodization time were 20V and 1h, respectively, as-prepared anodic nanotubular films were in highly ordered with the average inner diameter of about 120nm, the wall thickness of 17nm and the tube length about 300nm. The tubular nanostructures were examined by field emission scanning electron microscopy. The possible nanotube formation mechanism was also discussed.

scholarly journals Effects of Jet Path on Electrospun Polystyrene Fibers

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 842 ◽  
Author(s):  
Yuansheng Zheng ◽  
Na Meng ◽  
Binjie Xin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
High Speed ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
High Speed Photography ◽  
Fiber Mats ◽  
Jet Length ◽  
Scanning Electron

In this study we investigated the effects of jet path on the morphology and mat size of synthetic polystyrene (PS) fibers during the electrospinning process. In addition, the mechanism of the fiber mats, which were prepared by varying the solution concentration, was evaluated. The straight jet length, envelope cone and whipping frequency of each electrospun jet were studied using images captured by a high-speed photography camera. The results showed that higher solution concentrations led to longer straight jet lengths, smaller envelope cones and lower whipping frequencies. The diameter and surface morphology of the PS fibers were also characterized by scanning electron microscopy (SEM). It was found that fibers spun with higher solution concentrations exhibited larger diameters and diameter distributions because of their jet path features. Furthermore, the electrospun jets with higher concentrations increased elongation and produced smaller fiber mats and higher breaking forces as a result of their different jet paths, which was a consequence of varying the solution concentration.

Effect of Solution Properties on Electrospun Chlorinated Polyvinyl Chloride Nanofibers

2014 ◽  
Vol 1033-1034 ◽  
pp. 1020-1023
Author(s):  
Chun Mei Qiao ◽  
Ting Ting Jiang ◽  
Yin Ling Zhang ◽  
Wei Min Kang
Keyword(s):  
Electron Microscopy ◽  
Polyvinyl Chloride ◽  
Mixed Solvent ◽  
Mixed Solvents ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Dimethyl Formamide ◽  
Electrospun Fibers ◽  
Solution Properties ◽  
Scanning Electron

A kind of novel biodegradable Chlorinated Polyvinyl Chloride (CPVC) nanofibers using a mixture of Dimethyl Formamide (DMF) and Tetrahydrofuran (THF) as solvent were prepared by electrospinning process in this paper. The morphology of electrospun CPVC nanofiber nonwovens were investigated by scanning electron microscopy (SEM). Results indicated that the morphology and diameter of the electrospun fibers were influenced by CPVC solution concentration and the THF amount in the mixed solvents, and the finer and uniform nanofibers were electrospun from a mixed solvent of DMF and THF with ratio of 3/1(w/w).

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