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Polymers
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Functionalization of Composite Materials by Polymeric Nanofibers
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Functionalization of Composite Materials by Polymeric Nanofibers

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

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 1479

Special Issue Editors

Dr. Tommaso Maria Brugo

E-Mail Website
Guest Editor
Industrial Engineering Department, University of Bologna, 40136 Bologna, Italy
Interests: composite materials; nanofibers; mechanical properties; toughening; functionalization; self-sensing; structural health monitoring; composite design
Dr. Roberto Palazzetti

E-Mail Website
Guest Editor
Mechanical Department, Polytechnic University of Milan, 20156 Milan, Italy
Interests: composite materials; nanofibers; mechanical properties; toughening; composite design; additive manufacturing
Special Issues, Collections and Topics in MDPI journals
Dr. Emanuele Maccaferri

E-Mail Website
Guest Editor
Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
Interests: electrospinning; nanofibers; rubbery nanofibers; composite materials; toughening; thermal properties; mechanical properties; self-sensing

Special Issue Information

Dear Colleagues,

This Special Issue aims to collect and present the latest advancements and findings on the hot topic of the functionalization of composite materials by means of Polymeric Nanofibers. Papers to be considered for publication will have to present novelty related to, but not only, mechanical, thermal, electrical and magnetic properties enhancement and/or exploitation by nanofiber interleaving. Dynamic and mechanical performance improvement, sensing and healing multi-functionalization are of particular interest.

It is the editors’ intention to focus on aspects related to engineering applications, and therefore contributions shall be related to carbon/glass/aramid fibers, and thermosetting/thermoplastic/silicon matrices. Both research articles and critical reviews are welcomed.

Dr. Tommaso Maria Brugo
Dr. Roberto Palazzetti
Dr. Emanuele Maccaferri
Guest Editors

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

  • nanofiber
  • composite
  • electrospinning
  • fracture toughening
  • functionalization
  • damping
  • thermo-mechanical properties
  • thermal properties
  • self-sensing
  • self-healing

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Published Papers (1 paper)

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Research

16 pages, 6339 KiB  
Article
Low-Velocity Impact Resistance and Compression After Impact Strength of Thermoplastic Nanofiber Toughened Carbon/Epoxy Composites with Different Layups
by Timo Meireman, Erik Verboven, Mathias Kersemans, Wim Van Paepegem, Karen De Clerck and Lode Daelemans
Polymers 2024, 16(21), 3060; https://doi.org/10.3390/polym16213060 - 30 Oct 2024
Cited by 2 | Viewed by 846
Abstract
This study investigates the effectiveness of polyether block amide (PEBA) thermoplastic elastomeric nanofibers in reducing low-velocity impact damage across three carbon fiber composite lay-up configurations: a cross-ply [0°/90°]2s (CP) and a quasi-isotropic [0°/45°/90°/−45°]s (QI) lay-up utilizing unidirectional plies, and a stacked woven [(0°,90°)]4s [...] Read more.
This study investigates the effectiveness of polyether block amide (PEBA) thermoplastic elastomeric nanofibers in reducing low-velocity impact damage across three carbon fiber composite lay-up configurations: a cross-ply [0°/90°]2s (CP) and a quasi-isotropic [0°/45°/90°/−45°]s (QI) lay-up utilizing unidirectional plies, and a stacked woven [(0°,90°)]4s (W) lay-up using twill woven fabric plies. The flexural strength and interlaminar shear strength of the composites remained unaffected by the addition of nanofibers: around 750 MPa and 63 MPa for CP, 550 MPa and 58 MPa for QI, and 650 MPa and 50 MPa for W, respectively. The incorporation of nanofibers in the interlaminar regions resulted in a substantial reduction in projected damage area, ranging from 30% to 50% reduction over an impact energy range of 5–20 J. Microscopic analysis showed that especially the delamination damage decreased in toughened composites, while intralaminar damage remained similar for the cross-ply and quasi-isotropic lay-ups and decreased only in the woven lay-up. This agrees with the broad body of research that shows that interleaved nanofibers result in a higher delamination resistance due to toughening mechanisms related to nanofiber bridging of cracks. Despite their ability to mitigate delamination during impact, nanofibers showed limited positive effects on Compression After Impact (CAI) strength in quasi-isotropic and cross-ply composites. Interestingly, only the woven fabric composites demonstrated improved CAI strength, with a 12% improvement on average over the impact energy range, attributed to a reduction in both interlaminar and intralaminar damage. This study indicates the critical role of fiber integrity over delamination size in determining CAI performance, suggesting that the delaminations are not sufficiently large to induce buckling of sub-layers, thereby minimizing the effect of nanofiber toughening on the CAI strength. Full article
(This article belongs to the Special Issue Functionalization of Composite Materials by Polymeric Nanofibers)
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