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Processing and Thermal Properties of Hybrid Composites

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

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 7353

Special Issue Editor


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Guest Editor
Łukasiewicz Research Network - Industrial Chemistry Institute, Warsaw, Poland
Interests: polymer processing; reactive processing; polymer recycling; biodegradable polymers; composites and nanocomposites; fillers; active modifiers

Special Issue Information

Dear Colleagues,

This Special Issue of Materials, “Processing and Thermal Properties of Hybrid Composites”, will be focused on unusual materials, namely, hybrid composite materials. The term “hybrid” is generally understood as an object made from two or more different elements. Hybrid composite materials are defined as composites consisting of at least two dissimilar materials embedded in either a thermosetting or thermoplastic polymer matrix. What makes these materials so unique that intensive research is undertaken into their design and manufacture? The reason is their exceptional properties, which are superior to their nonhybrid counterparts.

Thus, the aim of this Special Issue is to publish and disseminate original research data, review articles, and communications that focus on new advances, challenges, and outlooks concerning the processing and properties, especially thermal, and application of hybrid polymer composites.

Prof. Dr. Regina Jeziorska
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

  • natural fibers
  • synthetic fibers
  • nanofillers
  • polymer composites
  • thermal properties

Published Papers (4 papers)

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Research

15 pages, 3355 KiB  
Article
Morphology and Properties of Poly(2,6-dimethyl-1,4-phenylene oxide)/Polyamide 11 Hybrid Nanocomposites: Effect of Silica Surface Modification
by Regina Jeziorska, Agnieszka Szadkowska and Maciej Studzinski
Materials 2022, 15(10), 3421; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15103421 - 10 May 2022
Cited by 2 | Viewed by 1203
Abstract
Poly(2,6-dimethyl-1,4-phenylene oxide)/polyamide 11 (PPO/PA11 80/20) blend filled with neat (SiO2) or modified silica having amine functional groups (A-SiO2) was melt mixing in a twin-screw extruder. The silica was prepared by the sol–gel process. SEM shows that, with increasing A-SiO [...] Read more.
Poly(2,6-dimethyl-1,4-phenylene oxide)/polyamide 11 (PPO/PA11 80/20) blend filled with neat (SiO2) or modified silica having amine functional groups (A-SiO2) was melt mixing in a twin-screw extruder. The silica was prepared by the sol–gel process. SEM shows that, with increasing A-SiO2 content from 1 to 5 wt.%, the morphology of PPO/PA11blend changed from droplet matrix to co-continuous with phase inversion. The phase inversion was also observed for 5 wt.% of neat silica, but the droplet-matrix structure was retained. The overall rheological and mechanical properties improvement of the A-SiO2-filled composites in comparison with the unfilled blend and neat silica counterpart was drastic, especially in terms of viscosity and stiffness. A-SiO2 improved PPO and PA11 miscibility and reduced the crystallinity of PA11, without affecting the Tc, owing to the compatibilization effect. On the other hand, neat silica slightly increased the crystallinity of PA11 and decreased the crystallization temperature of PA11 and the glass transition temperature of PPO as a result of its plasticization. Full article
(This article belongs to the Special Issue Processing and Thermal Properties of Hybrid Composites)
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15 pages, 2638 KiB  
Article
The Influence of Silica Nanoparticles on the Thermal and Mechanical Properties of Crosslinked Hybrid Composites
by Tomasz Klepka, Beata Podkościelna, Dariusz Czerwiński and Bronisław Samujło
Materials 2021, 14(23), 7431; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14237431 - 03 Dec 2021
Cited by 2 | Viewed by 1320
Abstract
This paper presents the synthesis and physicochemical characterization of a new hybrid composite. Its main goals are evaluating the structure and studying the thermal and mechanical properties of the crosslinked polymeric materials based on varying chemical properties of the compounds. As an organic [...] Read more.
This paper presents the synthesis and physicochemical characterization of a new hybrid composite. Its main goals are evaluating the structure and studying the thermal and mechanical properties of the crosslinked polymeric materials based on varying chemical properties of the compounds. As an organic crosslinking monomer, bisphenol A glycerolate diacrylate (BPA.GDA) was used. Trimethoxyvinylsilane (TMVS) and N-vinyl-2-pyrrolidone (NVP) were used as comonomers and active diluents. The inorganic fraction was the silica in the form of nanoparticles (NANOSiO2). The hybrid composites were obtained by the bulk polymerization method using the UV initiator Irqacure 651 with a constant weight ratio of the tetrafunctional monomer BPA.GDA to TMVS or NVP (7:3 wt.%) and different wt.% of silica nanoparticles (0, 1, 3%). The proper course of polymerization was confirmed by the ATR/FTIR spectroscopy and SEM EDAX analysis. In the composites spectra the signals correspond to the C=O groups from NVP at 1672–1675 cm−1, and the vibrations of Si–O–C and Si–O–Si groups at 1053–1100 cm−1 from TMVS and NANOSiO2 are visible. Thermal stabilities of the obtained composites were studied by a differential scanning calorimetry DSC. Compared to NVP the samples with TMVS degraded in one stage (422.6–425.3 °C). The NVP-derived materials decomposed in three stages (three endothermic effects on the DSC curves). The addition of NANOSiO2 increases the temperature of composites maximum degradation insignificantly. Additionally, the Shore D hardness test was carried out with original metrological measurements of changes in diameter after indentation in relation to the type of material. The accuracy analysis of the obtained test results was based on a comparative analysis of graphical curves obtained from experimental tests. The values of the changes course of similarity in the examined factors, represented by those of characteristic coefficients were determined based on the Fréchet’s theory. Full article
(This article belongs to the Special Issue Processing and Thermal Properties of Hybrid Composites)
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17 pages, 4573 KiB  
Article
Functionalization Mechanism of Reduced Graphene Oxide Flakes with BF3·THF and Its Influence on Interaction with Li+ Ions in Lithium-Ion Batteries
by Łukasz Kaczmarek, Magdalena Balik, Tomasz Warga, Ilona Acznik, Katarzyna Lota, Sebastian Miszczak, Anna Sobczyk-Guzenda, Karol Kyzioł, Piotr Zawadzki and Agnieszka Wosiak
Materials 2021, 14(3), 679; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14030679 - 02 Feb 2021
Cited by 2 | Viewed by 2451
Abstract
Doping of graphene and a controlled induction of disturbances in the graphene lattice allows the production of numerous active sites for lithium ions on the surface and edges of graphene nanolayers and improvement of the functionality of the material in lithium-ion batteries (LIBs). [...] Read more.
Doping of graphene and a controlled induction of disturbances in the graphene lattice allows the production of numerous active sites for lithium ions on the surface and edges of graphene nanolayers and improvement of the functionality of the material in lithium-ion batteries (LIBs). This work presents the process of introducing boron and fluorine atoms into the structure of the reduced graphene during hydrothermal reaction with boron fluoride tetrahydrofuran (BF3·THF). The described process is a simple, one-step synthesis with little to no side products. The synthesized materials showed an irregular, porous structure, with an average pore size of 3.44–3.61 nm (total pore volume (BJH)) and a multi-layer structure and a developed specific surface area at the level of 586–660 m2/g (analysis of specific surface Area (BET)). On the external surfaces, the occurrence of irregular particles with a size of 0.5 to 10 µm was observed, most probably the effect of doping the graphene structure and the formation of sp3 hybridization defects. The obtained materials show the ability to store electric charge due to the development of the specific surface area. Based on cyclic voltammetry, the tested material showed a capacity of 450–550 mAh/g (charged up to 2.5 V). Full article
(This article belongs to the Special Issue Processing and Thermal Properties of Hybrid Composites)
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16 pages, 29418 KiB  
Article
Fire-Temperature Influence on Portland and Calcium Sulfoaluminate Blend Composites
by Konrad A. Sodol, Łukasz Kaczmarek and Jacek Szer
Materials 2020, 13(22), 5230; https://0-doi-org.brum.beds.ac.uk/10.3390/ma13225230 - 19 Nov 2020
Cited by 4 | Viewed by 1874
Abstract
This paper presents the research data of the fire-temperature influence on Portland CEM I (OPC) and calcium sulfoaluminate (CSA) types of cement blend composites as cooling materials dedicated for infill and covers in fire systems. The data present the material responses for four [...] Read more.
This paper presents the research data of the fire-temperature influence on Portland CEM I (OPC) and calcium sulfoaluminate (CSA) types of cement blend composites as cooling materials dedicated for infill and covers in fire systems. The data present the material responses for four types at high-temperature elevation times (0, 15, 30, 60 min), such as core heat curves, differences in specimens color, flexural and compressive strength parameters. Materials were tested using the DSC method to collect information about enthalpies. The differences between cement blend composites were compared with commonly used cooling materials such as gypsum blends. It is shown that modifications to Portland cement composites by calcium sulfoaluminate cement have a significant influence on the cooling performance during high-temperature, even for 60 min of exposure. The temperature increase rates in the material core were slower in composites with regards to additionally containing calcium sulfoaluminate in 100–150 °C range. After 60 min of high-temperature elevation, the highest flexural and compressive strength was 75% OPC/25% CSA cement composition. The influence on cooling properties was not related to strength properties. The presented solution may have a significant influence as a passive extinguisher solution of future fire resistance systems in civil engineering. Full article
(This article belongs to the Special Issue Processing and Thermal Properties of Hybrid Composites)
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