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Recent Progress in Functional Materials and Their Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Composites".

Deadline for manuscript submissions: 20 July 2024 | Viewed by 2401

Special Issue Editors


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Guest Editor
Faculty of Physics, Institute for Research, Development, and Innovation in Applied Natural Sciences, Institute of Interdisciplinary Research in Bio-Nano-Sciences,”Babes-Bolyai” University, Cluj-Napoca, Romania
Interests: materials for biomedical, environmental and technological applications
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1. Department of Applied and Environmental Chemistry, Faculty of Natural Sciences and Informatics, Institute of Chemistry, University of Szeged, Szeged, Hungary
2. Faculty of Biology and Geology, Babeș-Bolyai University, Centre 3B, STAR-UBB, Cluj-Napoca, Romania
Interests: photocatalysis; ecotoxicology; environment–nanoparticle interaction; photochemistry
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Faculty of Physics, Babeș-Bolyai University, Cluj-Napoca, Romania
Interests: raman and IR spectroscopy; SERS; nanostructures; pharmaceuticals; photocatalysts; carbon-based nanomaterials
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Special Issue Information

Dear Colleagues,

Materials with desired properties for specific applications, such as electric, optical, thermal, mechanical, or magnetic, are called functional materials and have gained great attention in recent years. Considering that the physical, chemical, or biological properties of functional materials can be sensitive to changes in their structural arrangements in any dimensional range (i.e., micrometer, nanometer, or sub-nanometer scale), the study of nanostructured functional materials and their applications has become a key point of interest. Although there are many publications regarding functional materials, many experimental and theoretical aspects are still uncovered. On the other hand, there are recent signs of progress related to the performances of certain already in-use materials that originate from their specific properties. All the aspects mentioned above that are aimed at improving the performance of those structures for targeted applications are worth being reported in this Special Issue.

Topics of interest include but are not limited to:

  • Biomaterials
  • Composites for energy;
  • Magnetic functional materials;
  • Materials for electronics and photonics;
  • Functional materials synthesis and processing;
  • Functional materials theory, computation, and design;
  • Materials for environmental applications;
  • Surfaces and interfaces of functional materials;
  • Smart materials;
  • Hierarchical structures.

Prof. Dr. Lucian Baia
Dr. Zsolt Pap
Dr. Monica Baia
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. 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

  • biomaterials
  • functional nanomaterials
  • polymers
  • ceramics
  • functional composites
  • surface
  • interface

Published Papers (2 papers)

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21 pages, 11311 KiB  
Article
Investigating the Impact Behavior of Carbon Fiber/Polymethacrylimide (PMI) Foam Sandwich Composites for Personal Protective Equipment
by Xinyu Zhang, Miao Tian, Jun Li and Xinggang Chen
Materials 2024, 17(7), 1683; https://doi.org/10.3390/ma17071683 - 6 Apr 2024
Viewed by 764
Abstract
To improve the shock resistance of personal protective equipment and reduce casualties due to shock wave accidents, this study prepared four types of carbon fiber/polymethacrylimide (PMI) foam sandwich panels with different face/back layer thicknesses and core layer densities and subjected them to quasi-static [...] Read more.
To improve the shock resistance of personal protective equipment and reduce casualties due to shock wave accidents, this study prepared four types of carbon fiber/polymethacrylimide (PMI) foam sandwich panels with different face/back layer thicknesses and core layer densities and subjected them to quasi-static compression, low-speed impact, high-speed impact, and non-destructive tests. The mechanical properties and energy absorption capacities of the impact-resistant panels, featuring ceramic/ultra-high molecular-weight polyethylene (UHMWPE) and carbon fiber/PMI foam structures, were evaluated and compared, and the feasibility of using the latter as a raw material for personal impact-resistant equipment was also evaluated. For the PMI sandwich panel with a constant total thickness, increasing the core layer density and face/back layer thickness enhanced the energy absorption capacity, and increased the peak stress of the face layer. Under a constant strain, the energy absorption value of all specimens increased with increasing impact speed. When a 10 kg hammer impacted the specimen surface at a speed of 1.5 m/s, the foam sandwich panels retained better integrity than the ceramic/UHMWPE panel. The results showed that the carbon fiber/PMI foam sandwich panels were suitable for applications that require the flexible movement of the wearer under shock waves, and provide an experimental basis for designing impact-resistant equipment with low weight, high strength, and high energy absorption capacities. Full article
(This article belongs to the Special Issue Recent Progress in Functional Materials and Their Applications)
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16 pages, 9058 KiB  
Article
Analysis of Vibration-Damping Characteristics and Parameter Optimization of Cylindrical Cavity Double-Plate Phononic Crystal
by Chunsheng Song, Qi Yang, Xuechun Xiong, Rui Yin, Bo Jia, Yaru Liang and Haining Fang
Materials 2023, 16(13), 4605; https://doi.org/10.3390/ma16134605 - 26 Jun 2023
Cited by 1 | Viewed by 946
Abstract
For the application of low-frequency vibration damping in industry, a cylindrical cavity double-layer plate-type local resonance phononic crystal structure is proposed to solve low-frequency vibration in mechanical equipment. Initially, using COMSOL 5.4 software, the bending wave band gap is calculated in conjunction with [...] Read more.
For the application of low-frequency vibration damping in industry, a cylindrical cavity double-layer plate-type local resonance phononic crystal structure is proposed to solve low-frequency vibration in mechanical equipment. Initially, using COMSOL 5.4 software, the bending wave band gap is calculated in conjunction with elastic dynamics theory and the BOLOCH theorem to be 127–384 Hz. Then the mechanism of bending wave gap is analyzed by combining element mode shape and an equivalent model. Subsequently, the bending vibration transmission characteristics of the crystal plate are explained, and the vibration-damping characteristics are illustrated in combination with the time–frequency domain. An experimental system is constructed to verify the vibration-damping properties of crystal plates; the experimental results and simulation results are verified with each other. Finally, the element structural parameters are optimized using the RSM. Fifty-four sets of experiments are designed based on six structural factors and three levels, and the expressions between the bending wave band gap and six structural factors are obtained. Combining the particle swarm algorithm, the optimization is performed with the band gap width as the target. This method is shown to be more accurate than the commonly used interior point method. The structure of cylindrical-cavity-type phononic crystal and the parameter optimization method proposed in this paper provide a certain reference for the design of local-resonance-type phononic crystal. Full article
(This article belongs to the Special Issue Recent Progress in Functional Materials and Their Applications)
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