Special Issue "Electrospun Nanofibers: Theory and Its Applications"

A special issue of Polymers (ISSN 2073-4360).

Deadline for manuscript submissions: closed (10 June 2019)

Special Issue Editor

Guest Editor
Dr. Suman Sinha-Ray

a) Corporate Innovation Center, United States Gypsum 700 N US-45, Libertyville 60048, IL, USA
b) Department of Mechanical and Industrial Engineering, University of Illinois at Chicago (UIC) 842 West Taylor Street, M/C 251, Room 2039ERF Chicago 60607-7022, IL, USA
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Interests: experimental and theoretical study of production methods of nonwovens (electrospinning, solution blowing, and melt blowing); advanced manufacturing; experimental and theoretical thermal-fluid sciences at the micro/nanoscale; polymer and oxide materials; nano-structured materials; drug delivery; alternative energy; building science; acoustics

Special Issue Information

Dear Colleagues,

Electrospinning is one of the most versatile methods for producing polymer nanofibers en masse. In this process, the polymer jet is subjected to a very high electric field (~1–2 kv/cm). This results in vigorous stretching and bending of the viscoelatic polymer jet, as a result of which, the polymer jet diameter attenuates from the 1 mm order to ~ 100 nm. This sophisticated yet simple method of producing polymer nanofibers opens significant opportunities for research and new applications in various fields, from drug delivery to cell growth control, thermal management, energy storage applications, and others.

This Special Issue will deal with all the possible applications and theoretical studies regarding electrospinning and electrospinning-related process. The possible topics include, but are not limited to, electrospinning of novel nanofibers, biological applications, filtration, energy storage, studies of basic physical sciences using electrospun nanofibers, novel materials derived from the post-processing of nanofibers (e.g., oxide materials, organometallic materials, etc.), and others. Both original contributions and reviews are welcome.

Dr. Suman Sinha-Ray
Guest Editor

Manuscript Submission Information

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Keywords

  • Electrospinning
  • Nanofibers
  • Nanomaterials
  • Energy Storage
  • Biological Applications
  • Filtration
  • Theory

Published Papers (6 papers)

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Research

Open AccessArticle
Preparation of Zirconia Nanofibers by Electrospinning and Calcination with Zirconium Acetylacetonate as Precursor
Polymers 2019, 11(6), 1067; https://doi.org/10.3390/polym11061067
Received: 29 April 2019 / Revised: 12 June 2019 / Accepted: 19 June 2019 / Published: 20 June 2019
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Abstract
For the first time, zirconia nanofibers with an average diameter of about 75 nm have been fabricated by calcination of electrospun zirconium acetylacetonate/polyacrylonitrile fibers in the range of 500–1100 °C. Composite and ceramic filaments have been characterized by scanning electron microscopy, thermogravimetric analysis, [...] Read more.
For the first time, zirconia nanofibers with an average diameter of about 75 nm have been fabricated by calcination of electrospun zirconium acetylacetonate/polyacrylonitrile fibers in the range of 500–1100 °C. Composite and ceramic filaments have been characterized by scanning electron microscopy, thermogravimetric analysis, nitrogen adsorption analysis, energy-dispersive X-ray spectroscopy, and X-ray diffractometry. The stages of the transition of zirconium acetylacetonate to zirconia have been revealed. It has been found out that a rise in calcination temperature from 500 to 1100 °C induces transformation of mesoporous tetragonal zirconia nanofibers with a high specific surface area (102.3 m2/g) to non-porous monoclinic zirconia nanofibers of almost the same diameter with a low value of specific surface area (8.3 m2/g). The tetragonal zirconia nanofibers with high specific surface area prepared at 500 °C can be considered, for instance, as promising supports for heterogeneous catalysts, enhancing their activity. Full article
(This article belongs to the Special Issue Electrospun Nanofibers: Theory and Its Applications)
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Open AccessArticle
Conductive Bicomponent Fibers Containing Polyaniline Produced via Side-by-Side Electrospinning
Polymers 2019, 11(6), 954; https://doi.org/10.3390/polym11060954
Received: 1 May 2019 / Revised: 28 May 2019 / Accepted: 30 May 2019 / Published: 1 June 2019
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Abstract
In this study, using a barbed Y-connector as the spinneret, camphoric acid (CSA) doped polyaniline (PANI) and polyethylene oxide (PEO) were electrospun into side-by-side bicomponent fibers. Fiber mats obtained from this side-by-side spinneret were compared with those mats electrospun from blended PEO and [...] Read more.
In this study, using a barbed Y-connector as the spinneret, camphoric acid (CSA) doped polyaniline (PANI) and polyethylene oxide (PEO) were electrospun into side-by-side bicomponent fibers. Fiber mats obtained from this side-by-side spinneret were compared with those mats electrospun from blended PEO and PANI in terms of fiber morphology, electrical conductivity, thermal stability, mechanical properties, and relative resistivity under tensile strain. The influence of different content ratio of insulating PEO (3/4/5 w/v% to solvent) and conductive PANI-CSA (1.5/2.5/3.5 w/v% to solvent) on the abovementioned properties was studied as well. Results showed that this side-by-side spinning was capable of overcoming the poor spinnability of PANI to produce fibers with PEO carrying PANI on the surface of the bicomponent fibers, which demonstrated higher electrical conductivity than blends. Although the addition of PANI deteriorated mechanical properties for both side-by-side and blended fibers when compared to the pure PEO fibers, the side-by-side fibers showed much better fiber strength and elongation than blends. In addition, the superior ductility and decent relative electrical resistivity of the side-by-side fibers imparted them great potential for flexible sensor applications. Full article
(This article belongs to the Special Issue Electrospun Nanofibers: Theory and Its Applications)
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Open AccessArticle
TiO2 NPs Assembled into a Carbon Nanofiber Composite Electrode by a One-Step Electrospinning Process for Supercapacitor Applications
Polymers 2019, 11(5), 899; https://doi.org/10.3390/polym11050899
Received: 18 April 2019 / Revised: 10 May 2019 / Accepted: 14 May 2019 / Published: 17 May 2019
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Abstract
In this study, we have synthesized titanium dioxide nanoparticles (TiO2 NPs) into carbon nanofiber (NFs) composites by a simple electrospinning method followed by subsequent thermal treatment. The resulting composite was characterized by state-of-the-art techniques and exploited as the electrode material for supercapacitor [...] Read more.
In this study, we have synthesized titanium dioxide nanoparticles (TiO2 NPs) into carbon nanofiber (NFs) composites by a simple electrospinning method followed by subsequent thermal treatment. The resulting composite was characterized by state-of-the-art techniques and exploited as the electrode material for supercapacitor applications. The electrochemical behavior of the as-synthesized TiO2 NPs assembled into carbon nanofibers (TiO2-carbon NFs) was investigated and compared with pristine TiO2 NFs. The cyclic voltammetry and charge–discharge analysis of the composite revealed an enhancement in the performance of the composite compared to the bare TiO2 NFs. The as-obtained TiO2-carbon NF composite exhibited a specific capacitance of 106.57 F/g at a current density of 1 A/g and capacitance retention of about 84% after 2000 cycles. The results obtained from this study demonstrate that the prepared nanocomposite could be used as electrode material in a supercapacitor. Furthermore, this work provides an easy scale-up strategy to prepare highly efficient TiO2-carbon composite nanofibers. Full article
(This article belongs to the Special Issue Electrospun Nanofibers: Theory and Its Applications)
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Open AccessArticle
Engineered Electrospun Polyurethane Composite Patch Combined with Bi-functional Components Rendering High Strength for Cardiac Tissue Engineering
Polymers 2019, 11(4), 705; https://doi.org/10.3390/polym11040705
Received: 18 March 2019 / Revised: 5 April 2019 / Accepted: 11 April 2019 / Published: 17 April 2019
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Abstract
Cardiovascular application of nanomaterial’s is of increasing demand and its usage is limited by its mechanical and blood compatible properties. In this work, an attempt is made to develop an electrospun novel nanocomposite loaded with basil oil and titanium dioxide (TiO2) [...] Read more.
Cardiovascular application of nanomaterial’s is of increasing demand and its usage is limited by its mechanical and blood compatible properties. In this work, an attempt is made to develop an electrospun novel nanocomposite loaded with basil oil and titanium dioxide (TiO2) particles. The composite material displayed increase in hydrophobic and reduced fiber diameter compared to the pristine polymer. Fourier transform infrared spectroscopy results showed the interaction of the pristine polymer with the added substances. Thermal analysis showed the increased onset degradation, whereas the mechanical testing portrayed the increased tensile strength of the composites. Finally, the composite delayed the coagulation times and also rendered safe environment for red blood cells signifying its suitability to be used in contact with blood. Strikingly, the cellular toxicity of the developed composite was lower than the pristine polymer suggesting its compatible nature with the surrounding tissues. With these promising characteristics, developed material with enhanced physicochemical properties and blood compatibility can be successfully utilized for cardiac tissue applications. Full article
(This article belongs to the Special Issue Electrospun Nanofibers: Theory and Its Applications)
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Open AccessArticle
Electrospun Combination of Peppermint Oil and Copper Sulphate with Conducive Physico-Chemical properties for Wound Dressing Applications
Polymers 2019, 11(4), 586; https://doi.org/10.3390/polym11040586
Received: 27 February 2019 / Revised: 13 March 2019 / Accepted: 20 March 2019 / Published: 1 April 2019
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Abstract
The ultimate goal in tissue engineering is to fabricate a scaffold which could mimic the native tissue structure. In this work, the physicochemical and biocompatibility properties of electrospun composites based on polyurethane (PU) with added pepper mint (PM) oil and copper sulphate (CuSO [...] Read more.
The ultimate goal in tissue engineering is to fabricate a scaffold which could mimic the native tissue structure. In this work, the physicochemical and biocompatibility properties of electrospun composites based on polyurethane (PU) with added pepper mint (PM) oil and copper sulphate (CuSO4) were investigated. Field Emission Electron microscope (FESEM) study depicted the increase in mean fiber diameter for PU/PM and decrease in fiber diameter for PU/PM/CuSO4 compared to the pristine PU. Fourier transform infrared spectroscopy (FTIR) analysis revealed the formation of a hydrogen bond for the fabricated composites as identified by an alteration in PU peak intensity. Contact angle analysis presented the hydrophobic nature of pristine PU and PU/PM while the PU/PM/CuSO4 showed hydrophilic behavior. Atomic force microscopy (AFM) analysis revealed the increase in the surface roughness for the PU/PM while PU/PM/CuSO4 showed a decrease in surface roughness compared to the pristine PU. Blood compatibility studies showed improved blood clotting time and less toxic behavior for the developed composites than the pristine PU. Finally, the cell viability of the fabricated composite was higher than the pristine PU as indicated in the MTS assay. Hence, the fabricated wound dressing composite based on PU with added PM and CuSO4 rendered a better physicochemical and biocompatible nature, making it suitable for wound healing applications. Full article
(This article belongs to the Special Issue Electrospun Nanofibers: Theory and Its Applications)
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Open AccessArticle
A Parallel Bicomponent TPU/PI Membrane with Mechanical Strength Enhanced Isotropic Interfaces Used as Polymer Electrolyte for Lithium-Ion Battery
Polymers 2019, 11(1), 185; https://doi.org/10.3390/polym11010185
Received: 20 December 2018 / Revised: 14 January 2019 / Accepted: 17 January 2019 / Published: 21 January 2019
Cited by 14 | PDF Full-text (2726 KB) | HTML Full-text | XML Full-text
Abstract
In this work, a side-by-side bicomponent thermoplastic polyurethane/polyimide (TPU/PI) polymer electrolyte prepared with side-by-side electrospinning method is reported for the first time. Symmetrical TPU and PI co-occur on one fiber, and are connected by an interface transition layer formed by the interdiffusion of [...] Read more.
In this work, a side-by-side bicomponent thermoplastic polyurethane/polyimide (TPU/PI) polymer electrolyte prepared with side-by-side electrospinning method is reported for the first time. Symmetrical TPU and PI co-occur on one fiber, and are connected by an interface transition layer formed by the interdiffusion of two solutions. This structure of the as-prepared TPU/PI polymer electrolyte can integrate the advantages of high thermal stable PI and good mechanical strength TPU, and mechanical strength is further increased by those isotropic interface transition layers. Moreover, benefiting from micro-nano pores and the high porosity of the structure, TPU/PI polymer electrolyte presents high electrolyte uptake (665%) and excellent ionic conductivity (5.06 mS·cm−1) at room temperature. Compared with PE separator, TPU/PI polymer electrolyte exhibited better electrochemical stability, and using it as the electrolyte and separator, the assembled Li/LiMn2O4 cell exhibits low inner resistance, stable cyclic and notably high rate performance. Our study indicates that the TPU/PI membrane is a promising polymer electrolyte for high safety lithium-ion batteries. Full article
(This article belongs to the Special Issue Electrospun Nanofibers: Theory and Its Applications)
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