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Polymers
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Graphene-Related Nanocomposites for a Sustainable World: From Design to the...
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Graphene-Related Nanocomposites for a Sustainable World: From Design to the Final Validation

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 11582

Special Issue Editors

Dr. Gennaro Gentile

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Guest Editor
Consiglio Nazionale delle Ricerche, Institute for Polymers, Composites and Biomaterials (IPCB), Via Campi Flegrei, 34 80078 Pozzuoli, NA, Italy
Interests: multiphase polymer systems; smart materials; morphological and structural characterization
Special Issues, Collections and Topics in MDPI journals
Dr. Marino Lavorgna

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Guest Editor
Institute of Polymers, Composites and Biomaterials, National Research Council, P.le Fermi, 1-80055 Portici, Naples, Italy
Interests: polymer composites; graphene and its derivatives; multifunctional and multiscale charcaterization
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hesheng Xia

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Guest Editor
State Key Laboratory of Polymer Engineering Materials, Sichuan University, Cheng Du, China
Interests: graphene nancomposites; dynamic polymer and mechanochemistry; polymer materiasls for 3D printing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the last decade, several efforts have been dedicated to the design and development of multifunctional graphene-based nanocomposites, including graphene nanoparticles and their derivatives, as well as hybrid systems, obtained by assembling different 2D nanomaterials. These innovative systems, able to fulfill the growing demands of multifunctional materials, are currently realized through a fine design of the filler–polymer interfaces and an effective tailoring of the spatial distribution/localization of the filler within the polymeric matrix. In this respect, specific synthetic approaches, processing methods, and innovative technologies have been implemented to enhance structural and functional properties of multifunctional graphene-related composites, i.e., thermomechanical properties, electrical conductivity, piezoresistivity, corrosion resistance, gas barrier properties, sensing ability, adsorption capacity, stimuli responsiveness, and electromagnetic shielding.

The aim of this Special Issue is to provide, through the collection of original research papers and reviews, the latest advances with respect to innovative graphene-related nanocomposites (including hybrids with other 2D materials) able to fulfill the most prominent social challenges. The Special Issue will have a specific focus on environmental sustainability (water and air remediation), energy (production and storage), and healthcare (sensors, body protection, rehabilitation, and biomedical applications). Nevertheless, contributions on other relevant application sectors as well as contributions concerning future social challenges and opportunities of graphene-related nanocomposites will be evaluated.

Dr. Gennaro Gentile
Dr. Marino Lavorgna
Prof. Hesheng Xia
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

  • polymer composites
  • graphene-related nanomaterials and 2D materials
  • interfaces
  • control of spatial distribution
  • wearable sensors
  • elastomer composite
  • aerogels
  • foams
  • coatings

Published Papers (4 papers)

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Research

17 pages, 2593 KiB  
Article
Polyelectrolytes Enabled Reduced Graphite Oxide Water Dispersions: Effects of the Structure, Molecular Weight, and Charge Density
by Tianhui Jiang, Lorenza Maddalena, Julio Gomez, Federico Carosio and Alberto Fina
Polymers 2022, 14(19), 4165; https://doi.org/10.3390/polym14194165 - 04 Oct 2022
Cited by 2 | Viewed by 1309
Abstract
The polyelectrolyte (PE)-based water dispersion of graphene-related materials (GRMs) represents an interesting intermediate for the development of advanced materials by sustainable processes. Although the proof of concept has been demonstrated, there is a lack of knowledge for what concerns the effects of parameters [...] Read more.
The polyelectrolyte (PE)-based water dispersion of graphene-related materials (GRMs) represents an interesting intermediate for the development of advanced materials by sustainable processes. Although the proof of concept has been demonstrated, there is a lack of knowledge for what concerns the effects of parameters typical of PEs such as functionalization, molecular weight, and charge density. In this work, we evaluate the effects of such parameters on the quality and long-term stability of reduced graphite oxide (rGO) dispersion in aqueous media prepared by ultrasound sonication in the presence of different PEs. Four PEs were evaluated: polyacrylic acid (PAA), branched poly(ethylenimine) (BPEI), sodium carboxymethyl cellulose (CMC), and poly(sodium 4-styrenesulfonic acid) (PSS). The prepared dispersions were thoroughly characterized by means of UV-visible spectroscopy, thermogravimetric analysis, dynamic light scattering, and Raman spectroscopy. The highest concentrations of rGO were achieved by BPEI with a molecular weight of 25,000 and 270,000 Da (33 and 26 µg/mL, respectively). For other PEs, the rGO concentration was found to be independent of the molecular weight. The PAA-based dispersions displayed the best through-time stability while yielding homogeneous dispersion with a smaller average size and narrower size distribution. Full article
(This article belongs to the Special Issue Graphene-Related Nanocomposites for a Sustainable World: From Design to the Final Validation)
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14 pages, 5032 KiB  
Article
High Silica Content Graphene/Natural Rubber Composites Prepared by a Wet Compounding and Latex Mixing Process
by Jian Wang, Kaiye Zhang, Guoxia Fei, Martina Salzano de Luna, Marino Lavorgna and Hesheng Xia
Polymers 2020, 12(11), 2549; https://doi.org/10.3390/polym12112549 - 30 Oct 2020
Cited by 20 | Viewed by 3200
Abstract
The reduced graphene oxide (rGO) modified natural rubber composite (NR) filled with high contents of silica was prepared by a wet compounding and latex mixing process using a novel interface modifier cystamine dihydrochloride (CDHC) with coagulation ability. CDHC acts as a coagulation agent [...] Read more.
The reduced graphene oxide (rGO) modified natural rubber composite (NR) filled with high contents of silica was prepared by a wet compounding and latex mixing process using a novel interface modifier cystamine dihydrochloride (CDHC) with coagulation ability. CDHC acts as a coagulation agent through electrostatic interaction with rGO, SiO2, and latex rubber particles during the latex-based preparation process, while in the obtained silica/graphene/natural rubber composites, CDHC acts as an interface modifier. Compared with the composites prepared by the conventional mechanical mixing method, the dispersion of both rGO and SiO2 in the composites made by a wet compounding and latex mixing process is improved. As a result, the obtained silica/graphene/natural rubber composite prepared by this new method has good comprehensive properties. A Dynamic Mechanical Test suggests that the tan δ values of the composites at 60 °C decrease, indicating a low rolling resistance with increasing the graphene content at a low strain, but it increases at a higher strain. This unique feature for this material provides an advantage in the rubber tire application. Full article
(This article belongs to the Special Issue Graphene-Related Nanocomposites for a Sustainable World: From Design to the Final Validation)
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14 pages, 9397 KiB  
Communication
Electric Heating Behavior of Reduced Oxide Graphene/Carbon Nanotube/Natural Rubber Composites with Macro-Porous Structure and Segregated Filler Network
by Yanhu Zhan, Yuchao Li, Yanyan Meng, Qian Xie and Marino Lavorgna
Polymers 2020, 12(10), 2411; https://doi.org/10.3390/polym12102411 - 19 Oct 2020
Cited by 23 | Viewed by 2717
Abstract
Conductive polymer composites with carbonaceous fillers are very attractive and play a significant role in the field of electric heaters owing to their lightweight, corrosion resistance, and easy processing as well as low manufacturing cost. In this study, lightweight reduced oxide graphene/carbon nanotube/natural [...] Read more.
Conductive polymer composites with carbonaceous fillers are very attractive and play a significant role in the field of electric heaters owing to their lightweight, corrosion resistance, and easy processing as well as low manufacturing cost. In this study, lightweight reduced oxide graphene/carbon nanotube/natural rubber (rGO/CNT/NR) composites were fabricated by a facile and cost-effective approach, which consists of rGO assembling on rubber latex particles and hydrogels formation due to the interaction network established between carbonaceous fillers and subsequent mild-drying of the resulting hydrogels. Thanks to the amphiphilic nature of GO sheets, which can serve as a surfactant, the hydrophobic CNTs were easily dispersed into water under ultrasound. On the basis of both the high stable rGO and CNTs suspension and the assembling of rGO on rubber latex, a three-dimensional segregated network of CNT and rGO were easily constructed in macro-porous composites. Either the segregated network and macro-porous structure endowed the resulting composites with low density (0.45 g cm−3), high electrical conductivity (0.60 S m−1), and excellent electric heating behavior, when the weight content of rGO and CNTs are 0.5% and 2.5%, respectively. For electric heating behavior, the steady-state temperature of the above composites reaches 69.1 °C at an input voltage of 15 V. Full article
(This article belongs to the Special Issue Graphene-Related Nanocomposites for a Sustainable World: From Design to the Final Validation)
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19 pages, 5334 KiB  
Article
Characterization of Polyamide 6/Multilayer Graphene Nanoplatelet Composite Textile Filaments Obtained Via In Situ Polymerization and Melt Spinning
by Jelena Vasiljević, Andrej Demšar, Mirjam Leskovšek, Barbara Simončič, Nataša Čelan Korošin, Ivan Jerman, Matic Šobak, Gregor Žitko, Nigel Van de Velde and Marija Čolović
Polymers 2020, 12(8), 1787; https://doi.org/10.3390/polym12081787 - 10 Aug 2020
Cited by 11 | Viewed by 3273
Abstract
Studies of the production of fiber-forming polyamide 6 (PA6)/graphene composite material and melt-spun textile fibers are scarce, but research to date reveals that achieving the high dispersion state of graphene is the main challenge to nanocomposite production. Considering the significant progress made in [...] Read more.
Studies of the production of fiber-forming polyamide 6 (PA6)/graphene composite material and melt-spun textile fibers are scarce, but research to date reveals that achieving the high dispersion state of graphene is the main challenge to nanocomposite production. Considering the significant progress made in the industrial mass production of graphene nanoplatelets (GnPs), this study explored the feasibility of production of PA6/GnPs composite fibers using the commercially available few-layer GnPs. To this aim, the GnPs were pre-dispersed in molten ε-caprolactam at concentrations equal to 1 and 2 wt %, and incorporated into the PA6 matrix by the in situ water-catalyzed ring-opening polymerization of ε-caprolactam, which was followed by melt spinning. The results showed that the incorporated GnPs did not markedly influence the melting temperature of PA6 but affected the crystallization temperature, fiber bulk structure, crystallinity, and mechanical properties. Furthermore, GnPs increased the PA6 complex viscosity, which resulted in the need to adjust the parameters of melt spinning to enable continuous filament production. Although the incorporation of GnPs did not provide a reinforcing effect of PA6 fibers and reduced fiber tensile properties, the thermal stability of the PA6 fiber increased. The increased melt viscosity and graphene anti-dripping properties postponed melt dripping in the vertical flame spread test, which consequently prolonged burning within the samples. Full article
(This article belongs to the Special Issue Graphene-Related Nanocomposites for a Sustainable World: From Design to the Final Validation)
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