Production of superhydrophobic polymer fibers with embedded particles using the electrospinning technique

2008 ◽  
Vol 57 (1) ◽  
pp. 77-84 ◽  
Author(s):  
Richard Menini ◽  
Masoud Farzaneh
Keyword(s):  
Polymer Fibers ◽  
Electrospinning Technique ◽  
Embedded Particles

scholarly journals Sputter-Deposited Ag Nanoparticles on Electrospun PCL Scaffolds: Morphology, Wettability and Antibacterial Activity

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 345
Author(s):  
Daniele Valerini ◽  
Loredana Tammaro ◽  
Roberta Vitali ◽  
Gloria Guillot ◽  
Antonio Rinaldi
Keyword(s):  
Ag Nanoparticles ◽  
Food Packaging ◽  
Antimicrobial Agents ◽  
Antimicrobial Properties ◽  
Deposition Process ◽  
Polymer Fibers ◽  
Antibacterial Action ◽  
Porous Scaffolds ◽  
Electrospinning Technique ◽  
Sputtering Deposition

Porous scaffolds made of biocompatible and environmental-friendly polymer fibers with diameters in the nano/micro range can find applications in a wide variety of sectors, spanning from the biomedical field to textiles and so on. Their development has received a boost in the last decades thanks to advances in the production methods, such as the electrospinning technique. Conferring antimicrobial properties to these fibrous structures is a primary requirement for many of their applications, but the addition of antimicrobial agents by wet methods can present a series of drawbacks. In this work, strong antibacterial action is successfully provided to electrospun polycaprolactone (PCL) scaffolds by silver (Ag) addition through a simple and flexible way, namely the sputtering deposition of silver onto the PCL fibers. SEM-EDS analyses demonstrate that the polymer fibers get coated by Ag nanoparticles without undergoing any alteration of their morphological integrity upon the deposition process. The influence on wettability is evaluated with polar (water) and non-polar (diiodomethane) liquids, evidencing that this coating method allows preserving the hydrophobic character of the PCL polymer. Excellent antibacterial action (reduction > 99.995% in 4 h) is demonstrated against Escherichia coli. The easy fabrication of these PCL-Ag mats can be applicable to the production of biomedical devices, bioremediation and antifouling systems in filtration, personal protective equipment (PPE), food packaging materials, etc.

ELECTROSPINNING OF BIOMATERIALS AND THEIR APPLICATIONS IN TISSUE ENGINEERING

Nano LIFE ◽  
2012 ◽  
Vol 02 (04) ◽  
pp. 1230010 ◽  
Author(s):  
JEN-CHIEH WU ◽  
H. PETER LORENZ
Keyword(s):  
Tissue Engineering ◽  
Electrospinning Process ◽  
Polymer Fibers ◽  
Nanometer Scale ◽  
High Porosity ◽  
Electrospinning Technique ◽  
Engineering Research ◽  
Fibrous Scaffolds ◽  
Surface Areas ◽  
Tissue Engineering Research

Electrospinning is a process for generating micrometer or nanometer scale polymer fibers with large surface areas and high porosity. For tissue engineering research, the electrospinning technique provides a quick way to fabricate fibrous scaffolds with dimensions comparable to the extracellular matrix (ECM). A variety of materials can be used in the electrospinning process, including natural biomaterials as well as synthetic polymers. The natural biomaterials have advantages such as excellent biocompatibility and biodegradability, which can be more suitable for making biomimic scaffolds. In the last two decades, there have been growing numbers of studies of biomaterial fibrous scaffolds using the electrospinning process. In this review, we will discuss biomaterials in the electrospinning process and their applications in tissue engineering.

Solvent-free two-component electrospinning of ultrafine polymer fibers

2018 ◽  
Vol 42 (14) ◽  
pp. 11739-11745 ◽  
Author(s):  
Ying-Tao Zhao ◽  
Xu Yan ◽  
Hong-Wei He ◽  
Meng-Nan Liu ◽  
Xiao-Xiong Wang ◽  
...  
Keyword(s):  
Solvent Free ◽  
Polymer Fibers ◽  
Electrospinning Technique ◽  
Two Component ◽  
New Type

A new type of solvent-free electrospinning technique was developed to fabricate micro-fibers.

Charge Propagation along the Polymer Fiber of Polyhydroxybutyrate: Is it Possible to Apply the Cable Model?

2020 ◽  
Vol 869 ◽  
pp. 246-258
Author(s):  
Oleg V. Gradov ◽  
Margaret A. Gradova ◽  
Anatoly A. Olkhov ◽  
Alexey L. Iordanskiy
Keyword(s):  
Electron Beam ◽  
Nerve Fibers ◽  
Polymer Materials ◽  
Polymer Fibers ◽  
Electric Response ◽  
Polymer Fiber ◽  
Cable Model ◽  
Electrospinning Technique ◽  
Charge Propagation ◽  
Dielectric Polymer

This article considers experimental data on the surface charge propagation along the dielectric polymer fibers. Nonwoven polymer materials based on polyhydroxybutyrate obtained by electrospinning technique were used as an example of dielectric fibers in our experiments. Polymer fiber charging was investigated under the electron beam in a vacuum chamber of the scanning electron microscope. The fiber electric response registration was performed in a TV mode and in dynamic conditions using oscilloscopic sectioning visualization. Digitized images were processed using specialized software by Sobel-Feldman operator (Sobel filter), visualizing isopotential lines of the electron beam-induced emission. The results obtained were analyzed in the framework of the Roll’s cable model, which has been extrapolated from the electrical signal transduction along the nerve fibers to the charge propagation along the dielectric polymer fibers.

scholarly journals Optimized Loading of TiO2 Nanoparticles into Electrospun Polyacrylonitrile and Cellulose Acetate Polymer Fibers

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Sibongile C. Nkabinde ◽  
Makwena J. Moloto ◽  
Kgabo P. Matabola
Keyword(s):  
Cellulose Acetate ◽  
Anatase Phase ◽  
Sol Gel ◽  
Polymer Concentration ◽  
Emission Spectra ◽  
Average Diameter ◽  
Xrd Analysis ◽  
Polymer Fibers ◽  
Electrospinning Technique ◽  
Calcination Temperatures

Polyacrylonitrile (PAN), cellulose acetate (CA), PAN-TiO2, and CA-TiO2 nanofibers were prepared using the electrospinning technique under varying the loading of the TiO2 nanoparticles. The latter TiO2 nanoparticles were prepared using the sol-gel method by varying the calcination temperatures. The absorption and emission spectra illustrated the formation of TiO2 nanoparticles with an increase in absorption band edges with smaller particles. The TEM results showed the spherical morphology of the nanoparticles calcined at 500°C with an average diameter of 12.2±3.3 nm. XRD analysis revealed anatase phase as the dominant crystalline phase of the nanoparticles. TiO2 nanoparticle loadings of 0.2 and 0.4 wt% were incorporated into 16 wt% CA solutions while 1, 2, and 3 wt% of TiO2 nanoparticles were incorporated into 10 wt% PAN solutions. The SEM results illustrated the lowering in diameter and morphology of the nanofibers upon incorporation of nanoparticles. Their respective average diameters are 220, 338, 181, and 250 nm for PAN, CA, PAN-TiO2, and CA-TiO2 polymer fibers, respectively. The morphology of the nanofibers improved while the diameter increased with an increase in polymer concentration. Different loadings of TiO2 nanoparticles improved the electrospinnability and morphology and further decreased the size of the nanofibers. FTIR spectroscopy signifies the formation of nanocomposites and the presence of TiO2 nanoparticles which corresponded to the Ti-O stretching and Ti-O-Ti bands on the FTIR spectra.

scholarly journals Polymer fibers produced by electrospinning technique

2019 ◽  
Vol 1 (1) ◽  
pp. 6-7
Keyword(s):  
Organic Dyes ◽  
Low Cost ◽  
Electrospun Nanofibers ◽  
Point Of View ◽  
Polymer Fibers ◽  
Polymer Nanofibers ◽  
Electrospinning Technique ◽  
Simple Method ◽  
Polymeric Nanofibers ◽  
Doped Polymers

Electrospinning technique is a very simple method for producing polymer fibers with nano and micrometric diameters. The process is scalable, flexible and low-cost because does not require complicated devices or high temperatures. Thus, fine polymers’ fibers are drawn from solutions by applying a high electric field. These polymer fibers can be further functionalized using nanoparticles’ addition or further chemical or electrochemical deposition of various compounds on the surface of the electrospun nanofibers [1-3]. Functionalized meshes of nanofibers obtained by the electrospinning technique have been successfully used as thermochromic, magnetochromic, and electroluminescent devices. Such nanofibers were prove to be able to mimic the human muscles’ movements [4, 5]. Morphology control is allowed by the possibility of controlling all the process parameters (temperature, viscosity of polymeric solution, applied voltage, distance between electrodes, etc.). Electrospun polymeric nanofibers have multiple applications in medicine but they also permit manipulation of light at nanometric dimensions when doped with organic dyes or different nanoparticles. Dye doped polymers were studied in details, from the point of view of the emission tuning with morphology and with composition [6-9]. We present our studies regarding the tuning of the properties of polymer nanofibers produced by electrospinning. Our main objective was to produce functionalized polymer nanofibers by addition of different compounds and determine their structural, morphological and optical properties.

scholarly journals Preparation and Characterization of PVA/Zinc Acetate/ Boron Composite Fibers

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Ibrahim Uslu ◽  
Burcu Başer ◽  
Ahmet Yaylı ◽  
Mehmet Levent Aksu
Keyword(s):  
Zinc Acetate ◽  
Large Scale ◽  
Aluminum Foil ◽  
Electrospinning Process ◽  
Polymer Fibers ◽  
Zno Films ◽  
Composite Polymer ◽  
Scanning Calorimetry ◽  
Electrospinning Technique ◽  
Ft Ir

Abstract The objective of this work was to synthesize boron incorporated PVA/Zinc acetate nano precursor composite polymer fibers using electrospinning technique. Produced fibers, are useful reagents in organic synthesis of zinc oxide nano structures which have gained wide interest because of their potential applications in the fabrication of microelectronic devices. Boron incorporated PVA/Zinc acetate not only improve the electrical properties of ZnO films but also has an influence on the crystal structure of ZnO films. The fibers were measured and characterized by conductiometer (with four-point probe), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The formation of boron incorporated PVA/Zinc acetate hybrid polymer was confirmed by FT-IR spectra. SEM micrographs clearly reveal that there are random-growth oriented fibers on aluminum foil with diameters ranging from 0.5 to 1 μm. According to the TGA analysis decomposition of zinc acetate from the PVA chain was observed around 273 °C, 368 °C and 447 °C. Boron incorporated PVA/Zinc acetate nano composite polymer fibers have been successfully synthesized for the first time using electrospinning technique and characterized in detail as precursor material for ZnO. Electrospinning process has been a widely used, simple and versatile method and in future may be used for large-scale preparation of nanofibers of ZnO.

Conducting polymer fibers of polyaniline doped with camphorsulfonic acid

2006 ◽  
Vol 948 ◽  
Author(s):  
Saima Naz Khan ◽  
Aurangzeb Khan ◽  
Martin E. Kordesch
Keyword(s):  
Electrical Conductivity ◽  
Electron Microscope ◽  
Polyethylene Oxide ◽  
Fiber Length ◽  
Polymer Fibers ◽  
Camphorsulfonic Acid ◽  
Electrospinning Technique ◽  
Factors Affecting ◽  
Electrically Conducting ◽  
Transmission Electron

ABSTRACTElectrically conducting fibers of polyaniline doped with Camphorsulfonic acid PAn.HCSA in the Polyethylene Oxide (PEO) matrix were prepared using the non-mechanical electrospinning technique. The morphology of the fibers was studied using the scanning electron microscope (SEM) and Transmission electron microscope (TEM), showing a uniform thickness along the fiber length. The fibers had a diameter ranging from 800nm to 2μm. The electrical conductivity of the non-woven fibrous mat and the cast film was measured using the four-point probe method, for different concentrations of Pan.HCSA in the blend. Some possible factors affecting the electrical conductivity of the fibers/films were discussed.

Polarized microbeam FT-IR analysis of single fibers

1996 ◽  
Vol 54 ◽  
pp. 206-207
Author(s):  
Liling Cho ◽  
David L. Wetzel
Keyword(s):  
Molecular Orientation ◽  
Transition Point ◽  
Polymer Fibers ◽  
Single Fiber ◽  
Wire Grid ◽  
Polyester Fibers ◽  
Ft Ir ◽  
Ir Analysis ◽  
The Relationship ◽  
Wire Grid Polarizer

Polarized infrared microscopy has been used for forensic purposes to differentiate among polymer fibers. Dichroism can be used to compare and discriminate between different polyester fibers, including those composed of polyethylene terephthalate that are frequently encountered during criminal casework. In the fiber manufacturering process, fibers are drawn to develop molecular orientation and crystallinity. Macromolecular chains are oriented with respect to the long axis of the fiber. It is desirable to determine the relationship between the molecular orientation and stretching properties. This is particularly useful on a single fiber basis. Polarized spectroscopic differences observed from a single fiber are proposed to reveal the extent of molecular orientation within that single fiber. In the work presented, we compared the dichroic ratio between unstretched and stretched polyester fibers, and the transition point between the two forms of the same fiber. These techniques were applied to different polyester fibers. A fiber stretching device was fabricated for use on the instrument (IRμs, Spectra-Tech) stage. Tension was applied with a micrometer screw until a “neck” was produced in the stretched fiber. Spectra were obtained from an area of 24×48 μm. A wire-grid polarizer was used between the source and the sample.

Fabric Heater Made of Electroconductive Polymer Fibers

2015 ◽  
Vol 135 (9) ◽  
pp. 948-952
Author(s):  
Hiroaki Miura ◽  
Takashi Sunda ◽  
Mutsumi Kimura
Keyword(s):  
Polymer Fibers
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