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Electrospun Materials 2018
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Electrospun Materials 2018

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (15 June 2018) | Viewed by 44489

Special Issue Editor

Dr. Vitor Sencadas

E-Mail Website
Guest Editor
1. School of Mechanical, Materials, Mechatronics and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
2. ARC Center of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia
Interests: stretchable sensors; electroactive materials; soft robotics; piezoelectric materials and devices; piezoresistive sensors; polymer synthesis and characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Electrospinning is an easy and versatile technique to produce organic and inorganic fibers with average diameters ranging from a few nanometers up to a few micrometers. The ability to tune the fiber diameter allows control of the material surface area, as well as surface functionality, ultimately leading to a superior mechanical property of this materials. This Special Issue focuses on the latest developments and findings on electrospun materials for a wide range of applications, e.g., biomedical, bio-interfaces, wastewater management, oil spills, air pollution control, energy harvesting, and storage.

We are pleased to invite you to submit manuscripts for the Special Issue on “Electrospun Materials” in the form of full research papers, communications, and review articles. We look forward to your contribution to this Special Issue.


Dr. Vitor Sencadas
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Electrospun Materials
  • Wound Healing
  • Biopolymers
  • Electroactive Polymers
  • Bio-interfaces
  • Wastewater Management
  • Water and Air Pollution and Filtration
  • Energy Harvesting and Storage
  • Hierarchical Nanofibers
  • Food and Packaging Applications

Published Papers (7 papers)

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Research

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12 pages, 11240 KiB  
Article
Functionalized Electrospun Poly(Vinyl Alcohol) Nanofibrous Membranes with Poly(Methyl Vinyl Ether-Alt-Maleic Anhydride) for Protein Adsorption
by Mesbah Najafi, Joronia Chery and Margaret M. Frey
Materials 2018, 11(6), 1002; https://doi.org/10.3390/ma11061002 - 13 Jun 2018
Cited by 18 | Viewed by 4639
Abstract
In this work, electrospun poly(vinyl alcohol) (PVA) nanofiber membranes were functionalized by incorporating poly(methyl vinyl ether-alt-maleic anhydride) (poly(MVE/MA), PMA) for the selective adsorption of proteins. The capture performance was regulated by an optimizing buffer pH, PMA content, and protein concentration. Lysozyme was used [...] Read more.
In this work, electrospun poly(vinyl alcohol) (PVA) nanofiber membranes were functionalized by incorporating poly(methyl vinyl ether-alt-maleic anhydride) (poly(MVE/MA), PMA) for the selective adsorption of proteins. The capture performance was regulated by an optimizing buffer pH, PMA content, and protein concentration. Lysozyme was used as the model protein and a high adsorption capacity of 476.53 ± 19.48 was obtained at pH 6, owing to the electrostatic attraction between the negatively charged nanofibers and positively charged proteins. The large specific surface area, highly open porous structure, and abundant available carboxyl groups contributed to such high adsorption performance. Moreover, the nanofiber membranes exhibited good reusability and good selectivity for positively charged proteins. The obtained results can provide a promising method for the purification of proteins in small analytic devices. Full article
(This article belongs to the Special Issue Electrospun Materials 2018)
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13 pages, 3933 KiB  
Article
A Single-Step Surface Modification of Electrospun Silica Nanofibers Using a Silica Binding Protein Fused with an RGD Motif for Enhanced PC12 Cell Growth and Differentiation
by Wen Shuo Chen, Ling Yu Guo, Amien Mohamed Masroujeh, Anna Morgan Augustine, Cheng Kang Tsai, Ting Yu Chin, Yui Whei Chen-Yang and Mong-Lin Yang
Materials 2018, 11(6), 927; https://doi.org/10.3390/ma11060927 - 30 May 2018
Cited by 5 | Viewed by 5341
Abstract
In this study, a previously known high-affinity silica binding protein (SB) was genetically engineered to fuse with an integrin-binding peptide (RGD) to create a recombinant protein (SB-RGD). SB-RGD was successfully expressed in Escherichia coli and purified using silica beads through a simple and [...] Read more.
In this study, a previously known high-affinity silica binding protein (SB) was genetically engineered to fuse with an integrin-binding peptide (RGD) to create a recombinant protein (SB-RGD). SB-RGD was successfully expressed in Escherichia coli and purified using silica beads through a simple and fast centrifugation method. A further functionality assay showed that SB-RGD bound to the silica surface with an extremely high affinity that required 2 M MgCl2 for elution. Through a single-step incubation, the purified SB-RGD proteins were noncovalently coated onto an electrospun silica nanofiber (SNF) substrate to fabricate the SNF-SB-RGD substrate. SNF-SB-RGD was characterized by a combination of scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and immunostaining fluorescence microscopy. As PC12 cells were seeded onto the SNF-SB-RGD surface, significantly higher cell viability and longer neurite extensions were observed when compared to those on the control surfaces. These results indicated that SB-RGD could serve as a noncovalent coating biologic to support and promote neuron growth and differentiation on silica-based substrates for neuronal tissue engineering. It also provides proof of concept for the possibility to genetically engineer protein-based signaling molecules to noncovalently modify silica-based substrates as bioinspired material. Full article
(This article belongs to the Special Issue Electrospun Materials 2018)
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3942 KiB  
Article
Electrospun PVA/Bentonite Nanocomposites Mats for Drug Delivery
by Mariola Ferrández-Rives, Ángela Aurora Beltrán-Osuna, José Antonio Gómez-Tejedor and José Luis Gómez Ribelles
Materials 2017, 10(12), 1448; https://doi.org/10.3390/ma10121448 - 20 Dec 2017
Cited by 28 | Viewed by 5246
Abstract
Electrospun mats and films of polyvinyl alcohol (PVA) hydrogel are produced for drug delivery. To provide mechanical consistency to the gel a reinforcement by nanoclays is introduced in the polymer matrix. Four different suspensions of nanoparticles in the polymer solution are prepared in [...] Read more.
Electrospun mats and films of polyvinyl alcohol (PVA) hydrogel are produced for drug delivery. To provide mechanical consistency to the gel a reinforcement by nanoclays is introduced in the polymer matrix. Four different suspensions of nanoparticles in the polymer solution are prepared in an adequate solvent. These suspensions are subjected to an electrospinning process to produce the nanofiber mat, while films are produced by casting. The influence of the process parameters over the nanofibers microstructure is analyzed by scanning electron microscopy (SEM). The effectiveness of nanoclay encapsulation in the nanocomposites is tested by a thermogravimetric analysis. A crosslinking reaction in solution is carried out to prevent the dissolution of the nanocomposites in aqueous media. A model protein (bovine serum albumin, BSA) is absorbed in the nanocomposites to characterize the release kinetics in phosphate-buffered saline (PBS). Full article
(This article belongs to the Special Issue Electrospun Materials 2018)
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2878 KiB  
Article
Aminated Polyethylene Terephthalate (PET) Nanofibers for the Selective Removal of Pb(II) from Polluted Water
by Diego Morillo Martín, Mohamed Magdi Ahmed, Mónica Rodríguez, María A. García and Mirko Faccini
Materials 2017, 10(12), 1352; https://doi.org/10.3390/ma10121352 - 24 Nov 2017
Cited by 32 | Viewed by 6138
Abstract
Electrospun nanofibers have been successfully applied to remove toxic and carcinogenic contaminants such as heavy metals from polluted water. In this study, an efficient adsorbent based on poly(ethylene terephthalate) (PET) nanofibers was developed following a cheap, versatile and scalable process. PET nanofibers were [...] Read more.
Electrospun nanofibers have been successfully applied to remove toxic and carcinogenic contaminants such as heavy metals from polluted water. In this study, an efficient adsorbent based on poly(ethylene terephthalate) (PET) nanofibers was developed following a cheap, versatile and scalable process. PET nanofibers were first produced by electrospinning, and their surface was chemically functionalized using a simple aminolysis process. The capacity of the resulting material to adsorb Pb(II) from synthetic solutions was evaluated as a function of the contact time, pH, and initial metal ion concentration. The adsorbent system presented a quick kinetic adsorption, reaching an extremely high maximum adsorption capacity of about 50 millimol (mmol) of Pb(II) per gram of adsorbent system after just 30 min. Moreover, the effect of competing metal ions, such as Ni(II), Cd(II) and Cu(II), was studied at different molar ratios. Finally, when tested in continuous flow mode, aminated PET (APET) nanofibers were able to remove 97% of Pb(II) ions in solution, demonstrating their potential for the remediation of heavy metal-contaminated water. Full article
(This article belongs to the Special Issue Electrospun Materials 2018)
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1315 KiB  
Article
Measuring the Pull-Off Force of an Individual Fiber Using a Novel Picoindenter/Scanning Electron Microscope Technique
by Rahul Sahay, Ihor Radchenko, Arief S. Budiman and Avinash Baji
Materials 2017, 10(9), 1074; https://doi.org/10.3390/ma10091074 - 13 Sep 2017
Cited by 2 | Viewed by 3836
Abstract
We employed a novel picoindenter (PI)/scanning electron microscopy (SEM) technique to measure the pull-off force of an individual electrospun poly(vinylidene fluoride) (PVDF) fibers. Individual fibers were deposited over a channel in a custom-designed silicon substrate, which was then attached to a picoindenter. The [...] Read more.
We employed a novel picoindenter (PI)/scanning electron microscopy (SEM) technique to measure the pull-off force of an individual electrospun poly(vinylidene fluoride) (PVDF) fibers. Individual fibers were deposited over a channel in a custom-designed silicon substrate, which was then attached to a picoindenter. The picoindenter was then positioned firmly on the sample stage of the SEM. The picoindenter tip laterally pushed individual fibers to measure the force required to detach it from the surface of substrate. SEM was used to visualize and document the process. The measured pull-off force ranged between 5.8 ± 0.2 μN to ~17.8 ± 0.2 μN for individual fibers with average diameter ranging from 0.8 to 2.3 μm. Thus, this study, a first of its kind, demonstrates the use of a picoindenter to measure the pull-off force of a single micro/nanofiber. Full article
(This article belongs to the Special Issue Electrospun Materials 2018)
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Review

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16 pages, 853 KiB  
Review
Current and Emerging Approaches to Engineer Antibacterial and Antifouling Electrospun Nanofibers
by Irene S. Kurtz and Jessica D. Schiffman
Materials 2018, 11(7), 1059; https://doi.org/10.3390/ma11071059 - 22 Jun 2018
Cited by 65 | Viewed by 6529
Abstract
From ship hulls to bandages, biological fouling is a ubiquitous problem that impacts a wide range of industries and requires complex engineered solutions. Eliciting materials to have antibacterial or antifouling properties describes two main approaches to delay biofouling by killing or repelling bacteria, [...] Read more.
From ship hulls to bandages, biological fouling is a ubiquitous problem that impacts a wide range of industries and requires complex engineered solutions. Eliciting materials to have antibacterial or antifouling properties describes two main approaches to delay biofouling by killing or repelling bacteria, respectively. In this review article, we discuss how electrospun nanofiber mats are blank canvases that can be tailored to have controlled interactions with biologics, which would improve the design of intelligent conformal coatings or freestanding meshes that deliver targeted antimicrobials or cause bacteria to slip off surfaces. Firstly, we will briefly discuss the established and emerging technologies for addressing biofouling through antibacterial and antifouling surface engineering, and then highlight the recent advances in incorporating these strategies into electrospun nanofibers. These strategies highlight the potential for engineering electrospun nanofibers to solicit specific microbial responses for human health and environmental applications. Full article
(This article belongs to the Special Issue Electrospun Materials 2018)
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8064 KiB  
Review
Electrospun Ceramic Nanofiber Mats Today: Synthesis, Properties, and Applications
by Hamid Esfahani, Rajan Jose and Seeram Ramakrishna
Materials 2017, 10(11), 1238; https://doi.org/10.3390/ma10111238 - 27 Oct 2017
Cited by 133 | Viewed by 12134
Abstract
Ceramic nanofibers (NFs) have recently been developed for advanced applications due to their unique properties. In this article, we review developments in electrospun ceramic NFs with regard to their fabrication process, properties, and applications. We find that surface activity of electrospun ceramic NFs [...] Read more.
Ceramic nanofibers (NFs) have recently been developed for advanced applications due to their unique properties. In this article, we review developments in electrospun ceramic NFs with regard to their fabrication process, properties, and applications. We find that surface activity of electrospun ceramic NFs is improved by post pyrolysis, hydrothermal, and carbothermal processes. Also, when combined with another surface modification methods, electrospun ceramic NFs result in the advancement of properties and widening of the application domains. With the decrease in diameter and length of a fiber, many properties of fibrous materials are modified; characteristics of such ceramic NFs are different from their wide and long (bulk) counterparts. In this article, electrospun ceramic NFs are reviewed with an emphasis on their applications as catalysts, membranes, sensors, biomaterials, fuel cells, batteries, supercapacitors, energy harvesting systems, electric and magnetic parts, conductive wires, and wearable electronic textiles. Furthermore, properties of ceramic nanofibers, which enable the above applications, and techniques to characterize them are briefly outlined. Full article
(This article belongs to the Special Issue Electrospun Materials 2018)
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