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Polymers
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Advances in Electrospun Nanofibers
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Advances in Electrospun Nanofibers

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Fibers".

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 8690

Special Issue Editor

Prof. Dr. Budimir Mijović

E-Mail Website
Guest Editor
Faculty of Textile Technology, University of Zagreb, Prilaz baruna Filipovića 28a, 1000 Zagreb, Croatia
Interests: muliscale modeling; electrospun nanofibers; meso/micro/nano scale; scaffolds; cells structure

Special Issue Information

Dear Colleagues,

Nanofibers are a basic building block for plants and animals. From a structural point of view, a uniaxial structure can transmit forces along its length and reduce the required mass of materials. Following the successful design concepts found in nature, therefore, nanofibers are an attractive basic building component in the construction of hierarchically organized nanostructures. To follow nature’s design, however, a process that can fabricate nanofibers from a variety materials and mixtures is a prerequisite. Nanofiber arrangement control is also necessary to optimize structural requirements. Finally, incorporation of other components into nanofibers is required to form a complex, hierarchically organized composite. A nanofiber fabrication technique known as the electrospinning process has the potential to play a vital role in the construction of a multilevel nanostructure.

Electrospun fibers are increasingly being used in a variety of applications such as tissue engineering scaffolds, wound healing, drug delivery, immobilization of enzymes, as membranes in biosensors, protective clothing, cosmetics, affinity membranes, filtration applications, etc. In summary, Mother Nature has always used hierarchical structures such as capillaries and dendrites to increase the multifunctionality of living organs. Material scientists are beginning to use this concept to create multiscale structures where nanotubes and nanofillers can be attached to larger surfaces and subsequently functionalized. In principle, many more applications can be envisioned and created. Despite the several advantages and success to date of electrospinning, there are some critical limitations in this process, such as small pore size inside the fibers, that must be addressed, and this is but one of the issues we invite you to focus on in this Special Issue. Considering your great contributions to this research field, we would like to cordially invite you to submit an unpublished paper to this issue.

 

Prof. Dr. Budimir Mijovic

Guest Editor

Prof. Dr. Budimir Mijović
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. Polymers 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 2700 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

  • multiscale material modeling
  • meso/micro/nano scale
  • fibrous structure
  • electrospun nanofibers
  • tissue engineering electrospinning

Published Papers (3 papers)

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Research

11 pages, 4282 KiB  
Article
Design and Preparation of Polyimide/TiO2@MoS2 Nanofibers by Hydrothermal Synthesis and Their Photocatalytic Performance
by Zhenjun Chang, Xiaoling Sun, Zhengzheng Liao, Qiang Liu and Jie Han
Polymers 2022, 14(16), 3230; https://doi.org/10.3390/polym14163230 - 9 Aug 2022
Cited by 6 | Viewed by 1901
Abstract
Organic–inorganic nanocomposite fibers can avoid the agglomeration of single nanoparticles and reduce the cost (nanoparticles assembled on the surface of nanofibers), but also can produce new chemical, electrical, optical, and other properties, with a composite synergistic effect. Aromatic polyimide (PI) is a high-performance [...] Read more.
Organic–inorganic nanocomposite fibers can avoid the agglomeration of single nanoparticles and reduce the cost (nanoparticles assembled on the surface of nanofibers), but also can produce new chemical, electrical, optical, and other properties, with a composite synergistic effect. Aromatic polyimide (PI) is a high-performance polymer with a rigid heterocyclic imide ring and an aromatic benzene ring in its macromolecular framework. Due to its excellent mechanical properties, thermal stability, and easy-to-adjust molecular structure, PI has been widely used in electronics, aerospace, automotive, and other industries related to many applications. Here, we report that TiO2 nanorods were grown on polyimide nanofibers by hydrothermal reaction, and MoS2 nanosheets were grown on TiO2 nanorods the same way. Based on theoretical analysis and experimental findings, the possible growth mechanism was determined in detail. Further experiments showed that MoS2 nanosheets were uniformly coated on the surface of TiO2 nanorods. The TiO2 nanorods have photocatalytic activity in the ultraviolet region, but the bandgap of organic/inorganic layered nanocomposites can redshift to visible light and improve their photocatalytic performance. Full article
(This article belongs to the Special Issue Advances in Electrospun Nanofibers)
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14 pages, 6397 KiB  
Article
Effect of Solution Miscibility on the Morphology of Coaxial Electrospun Cellulose Acetate Nanofibers
by Ke Yan, Yao Le, Hu Mengen, Li Zhongbo and Huang Zhulin
Polymers 2021, 13(24), 4419; https://doi.org/10.3390/polym13244419 - 16 Dec 2021
Cited by 7 | Viewed by 3060
Abstract
Coaxial electrospinning (co-electrospinning) technique has greatly expanded the universality of fabricating core-shell polymer nanofibers. However, the effect of solution miscibility on the morphology of co-electrospun products remains unclear. Herein, different cellulose acetate (CA) solutions with high solution miscibility but distinctly different electrospinnability were [...] Read more.
Coaxial electrospinning (co-electrospinning) technique has greatly expanded the universality of fabricating core-shell polymer nanofibers. However, the effect of solution miscibility on the morphology of co-electrospun products remains unclear. Herein, different cellulose acetate (CA) solutions with high solution miscibility but distinctly different electrospinnability were used to survey the effect of solution miscibility on the co-electrospinning process. The structural characterizations show that co-electrospun products are composed of nanofibers with and without the core-shell structure. This indicates that partial solution mixing occurred during the co-electrospinning process instead of absolute no-mixing or complete mixing. Importantly, the solution miscibility also shows a significant influence on the product morphology. In particular, the transformation from nanofibers to microparticles was realized with the increase of core-to-shell flow ratio during the co-electrospinning of core electrosprayable CA/dimethylacetamide (DMAc) solution and shell electrospinnable CA/acetone-DMAc (2/1, v/v) solution. Results show that the solution miscibility exerts a significant effect on not only the formation of core-shell structure but also the product morphology. This work provides a new insight for the in-depth understanding of the co-electrospinning process. Full article
(This article belongs to the Special Issue Advances in Electrospun Nanofibers)
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14 pages, 3259 KiB  
Article
Hybrid Nanofibrous Membranes as a Promising Functional Layer for Personal Protection Equipment: Manufacturing and Antiviral/Antibacterial Assessments
by Latifah Abdullah Alshabanah, Mohamed Hagar, Laila A. Al-Mutabagani, Ghada M. Abozaid, Salwa M. Abdallah, Nader Shehata, Hoda Ahmed and Ahmed H. Hassanin
Polymers 2021, 13(11), 1776; https://doi.org/10.3390/polym13111776 - 28 May 2021
Cited by 17 | Viewed by 3130
Abstract
In this research work, nanofibrous hybrids are manufactured, characterized, and assessed as active antiviral and antibacterial membranes. In more detail, both polyvinyl alcohol (PVA) and thermoplastic polyurethane (TPU) nanofibrous (NF) membranes and their composites with embedded silver nanoparticles (Ag NPs) are manufactured by [...] Read more.
In this research work, nanofibrous hybrids are manufactured, characterized, and assessed as active antiviral and antibacterial membranes. In more detail, both polyvinyl alcohol (PVA) and thermoplastic polyurethane (TPU) nanofibrous (NF) membranes and their composites with embedded silver nanoparticles (Ag NPs) are manufactured by an electrospinning process. Their morphological structures have been investigated by a scanning electron microscope (SEM) which revealed a homogenous distribution and almost beads-free fibers in all manufactured samples. Characterization with spectroscopic tools has been performed and proved the successful manufacturing of Ag-incorporated PVA and TPU hybrid nanofibers. The crystalline phase of the nanofibers has been determined using an X-ray diffractometer (XRD) whose patterns showed their crystalline nature at an angle value (2θ) of less than 20°. Subsequent screening of both antiviral and antibacterial potential activities of developed nanohybrid membranes has been explored against different viruses, including SARS-Cov-2 and some bacterial strains. As a novel approach, the current work highlights potential effects of several polymeric hybrids on antiviral and antibacterial activities particularly against SARS-Cov-2. Moreover, two types of polymers have been tested and compared; PVA of excellent biodegradable and hydrophilic properties, and TPU of excellent mechanical, super elasticity, hydrophobicity, and durability properties. Such extreme polymers can serve a wide range of applications such as PPE, filtration, wound healing, etc. Consequently, assessment of their antiviral/antibacterial activities, as host matrices for Ag NPs, is needed for different medical applications. Our results showed that TPU-Ag was more effective than PVA-Ag as HIV-1 antiviral nanohybrid as well as in deactivating spike proteins of SARS-Cov-2. Both TPU-Ag and PVA-Ag nanofibrous membranes were found to have superior antimicrobial performance by increasing Ag concentration from 2 to 4 wt.%. Additionally, the developed membranes showed acceptable physical and mechanical properties along with both antiviral and antibacterial activities, which can enable them to be used as a promising functional layer in Personal Protective Equipment (PPE) such as (surgical gowns, gloves, overshoes, hair caps, etc.). Therefore, the developed functional membranes can support the decrease of both coronavirus spread and bacterial contamination, particularly among healthcare professionals within their workplace settings. Full article
(This article belongs to the Special Issue Advances in Electrospun Nanofibers)
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