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).

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).

Electrospinning of Pullulan Nanofibers for Food Package Materials

2013 ◽  
Vol 821-822 ◽  
pp. 1321-1325 ◽  
Author(s):  
Yong Fang Qian ◽  
Lai Jiu Zheng ◽  
Ruo Yuan Song ◽  
Bing Du
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Normal Distribution ◽  
Electrospun Nanofibers ◽  
Solution Concentration ◽  
Electrospun Fibers ◽  
Food Package ◽  
Water As Solvent ◽  
Package Materials ◽  
Scanning Electron

Electrospinning is a process that fabricates continuous fibers with diameters in the nanoto micron range. Pullulan with different concentrations were successfully electrospun into nanofibers with water as solvent in this study. We have evaluated the effects of solution concentration on the morphology of the fibers. The morphologies of the nanofibrous mats were examined by Scanning Electron Microscopy (SEM). With increasing the solution concentration, the electrospun nanofibers changed from beaded nanofibers to smooth nanofibers, meanwhile, the average diameters of electrospun pullulan nanofibers increased from 44nm, 89nm, 136nm, 172nm to 219nm when the solution concentration changed from 12, 15, 20, 25 to 30 wt%. The distribution of electrospun fibers is normal distribution. The electrospun nanofibrous mats will be a promising food package material.

Effect of electrospinning parameters on the characterization of PLA/HNT nanocomposite fibers

2010 ◽  
Vol 25 (5) ◽  
pp. 857-865 ◽  
Author(s):  
Ahmed H. Touny ◽  
Joseph G. Lawrence ◽  
Andrew D. Jones ◽  
Sarit B. Bhaduri
Keyword(s):  
Electron Microscopy ◽  
Biomedical Applications ◽  
Solution Concentration ◽  
Halloysite Nanotubes ◽  
Electrospinning Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nanocomposite Fibers ◽  
Scanning Electron

Halloysite nanotubes (HNT) reinforced polylactic acid (PLA) nanocomposite fibers were produced using an electrospinning approach for biomedical applications. The PLA/HNT nanocomposite fibers were characterized using x-ray diffraction (XRD) and scanning electron microscopy (SEM). The various factors such as type of solvent, solution concentration, HNT loading and feed rate, affecting the electrospinning process, and the morphology of the nanofibers were investigated, and the optimum values for these parameters are suggested. The results indicated that the addition of dimethylformamide (DMF) to chloroform facilitated the electrospinning process because of the improvement in electrical conductivity and viscosity of the solution. Nanometer-sized fibers were obtained by the addition of HNT to PLA. HNT loadings had a significant effect on the morphology of the nanofibers. Bead-free fibers were produced at feed rates between 1 and 4 mL/h.

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.

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.

scholarly journals Investigation of the Fiber, Bulk, and Surface Properties of Meltblown and Electrospun Polymeric Fabrics

2004 ◽  
Vol os-13 (3) ◽  
pp. 1558925004os-13
Author(s):  
Peter P. Tsai ◽  
WeiWei Chen ◽  
J. Reece Roth
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fiber Diameter ◽  
Electrospinning Process ◽  
Electrospun Fibers ◽  
Microscopic Structure ◽  
Electrospun Nanofiber ◽  
Sem Images ◽  
Nylon Fabric ◽  
Scanning Electron

We measured and compared the properties of meltblown and electrospun fabrics made of nylon and polyurethane (PU). Properties of interest included surface energy/wettability, strength, fiber diameter, and microscopic structure as revealed by scanning electron microscopy (SEM). We also report new data on the diameters of electrospun fibers measured from digitized SEM images of electrospun nylon, polyurethane (PU), polyacrylonitrile (PAN), polycaprolactone (PCL), and polycarbonate (PC) fabrics. The electrospinning process produced fibers with diameters in the range from 10 nm to several microns. It was found that the strength per unit areal weight of electrospun nanofiber nylon fabric was up to ten times that of the meltblown material, and for polyurethane (PU) fabric, from 2.5–3 times that of the melt-blown material.

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.

Preparation of Carbon Nanofibers from Polyacrylonitrile Nanofibers by Electrospinning

2011 ◽  
Vol 415-417 ◽  
pp. 642-647
Author(s):  
En Zhong Li ◽  
Da Xiang Yang ◽  
Wei Ling Guo ◽  
Hai Dou Wang ◽  
Bin Shi Xu
Keyword(s):  
Electron Microscope ◽  
Carbon Nanofibers ◽  
Photoelectron Spectroscopy ◽  
Solution Concentration ◽  
Dimethyl Formamide ◽  
Ultrafine Fibers ◽  
X Ray ◽  
Scanning Electron ◽  
Pan Fibers

Ultrafine fibers were electrospun from polyacrylonitrile (PAN)/N,N-dimethyl formamide (DMF) solution as a precursor of carbon nanofibers. The effects of solution concentration, applied voltage and flow rate on preparation and morphologies of electrospun PAN fibers were investigated. Morphologies of the green fibers, stabilized fibers and carbonized fibers were compared by scanning electron microscope (SEM). The diameter of PAN nanofibers is about 450nm and the distribution of diameter is well-proportioned. Characterization of the elements changes of fibers were performed by X-ray photoelectron spectroscopy (XPS).

Fabrication and Characterization of Fibrous Polycaprolactone Blended with Natural Green Tea Extracts Using Dual Solvent Systems

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ainatul Aqilah Binti Mohd Rashid ◽  
Saravana Kumar Jaganathan ◽  
Ahmad Zahran Mohd Khudzari ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Electron Microscopy ◽  
Green Tea ◽  
Water Uptake ◽  
Wound Dressing ◽  
Electrospun Fibers ◽  
Fibrous Morphology ◽  
Solvent Systems ◽  
Fabrication And Characterization ◽  
Scanning Electron

AbstractNanofibrous dressings serve as an impeccable candidate in the management of wounds. Nanofibrous composites composed of polycaprolactone (PCL) and green tea using dual solvent systems at different ratios were fabricated through electrospinning. Pure PCL electrospun fibers along with composites were characterized by using scanning electron microscopy (SEM), wettability, water uptake analysis, and Fourier transform infrared spectroscopy (FTIR). SEM indicated that fibrous morphology and the diameter of PCL/green tea were smaller for chloroform/dimethylformamide (DMF) (601 nm) and acetone/DMF (896 nm) than the pure PCL (673 nm and 1,104 nm for chloroform/DMF and acetone/DMF, respectively). Wettability of the fabricated composites was increased, and pure PCL fibers were slightly more hydrophobic (100°) than PCL/green tea (94°). Water uptake of the composites was enhanced compared with PCL significantly in acetone/DMF. The PCL/green tea nanofibrous wound dressing with enhanced physicochemical properties serves as an indispensable candidate for wound healing applications.

scholarly journals Improvement of the Firocoxib Dissolution Performance Using Electrospun Fibers Obtained from Different Polymer/Surfactant Associations

2019 ◽  
Vol 20 (12) ◽  
pp. 3084 ◽  
Author(s):  
Lauretta Maggi ◽  
Valeria Friuli ◽  
Enrica Chiesa ◽  
Silvia Pisani ◽  
Mirena Sakaj ◽  
...  
Keyword(s):  
Amorphous State ◽  
Electrospinning Process ◽  
Electrospun Fibers ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Water Interaction ◽  
Remarkable Improvement ◽  
Polymer Surfactant ◽  
Carrier Systems ◽  
Scanning Electron

An electrospinning process was optimized to produce fibers of micrometric size with different combinations of polymeric and surfactant materials to promote the dissolution rate of an insoluble drug: firocoxib. Scanning Electron Microscopy (SEM) showed that only some combinations of the proposed carrier systems allowed the production of suitable fibers and further fine optimization of the technique is also needed to load the drug. Differential scanning calorimetry (DSC) and X-ray powder diffraction (XRPD) suggest that the drug is in an amorphous state in the final product. Drug amorphization, the fine dispersion of the active in the carriers, and the large surface area exposed to water interaction obtained through the electrospinning process can explain the remarkable improvement in the dissolution performance of firocoxib from the final product developed.

Sign in / Sign up

Export Citation Format

Share Document