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Reprocessable, Repairable and Recyclable Polymers and Composites

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

Deadline for manuscript submissions: closed (20 April 2023) | Viewed by 2224

Special Issue Editors


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Guest Editor
CIDETEC, Basque Research and Technology Alliance (BRTA), Paseo Miramón, 196, 20014 Donostia-San Sebastián, Spain
Interests: polymers; dynamic covalent chemistry; thermosets; adhesives; sustainability; green chemistry

E-Mail Website
Guest Editor
CIDETEC, Basque Research and Technology Alliance (BRTA), Paseo Miramón, 196, 20014 Donostia-San Sebastián, Spain
Interests: polymers; dynamic covalent chemistry; thermosets; biopolymers; sustainability; green chemistry

E-Mail Website
Guest Editor
CIDETEC, Basque Research and Technology Alliance (BRTA), Paseo Miramón, 196, 20014 Donostia-San Sebastián, Spain
Interests: organic chemistry; polymers; dynamic covalent chemistry; thermosets; biopolymers; sustainability; green chemistry

Special Issue Information

Dear Colleagues,

The journal Materials is preparing a Special Issue entitled “Reprocessable, Repairable and Recyclable Polymers and Composites”.

The need to reduce CO2 emissions and the ambitious global climate change goals are leading to rethink the carbon footprint of current Polymers and Composites. The use and design of lightweight materials has been an important topic towards CO2 reduction but maintaining high performance required for these materials. Thus, lightweight materials are becoming increasingly important in many industries. The use of fiber reinforced plastics (FRPs) has been one of the most promising options where high mechanical and thermal properties together with light weight are required. However, most of the FRPs contain a thermoset resin. Being thermosets, it also means that these polymers and composites cannot be reshaped or dissolved, making the recycling and repairing of thermoset materials more challenging.

Moreover, due to the current environmental concern the obtention of Reprocessable and Recyclable Polymers and Composites is becoming a must. In the last years, the use of thermoset materials is becoming a big concern due to their lack of recyclability. Recent developments often involve the substitution of traditional thermosets with more sustainable covalent adaptable networks or vitrimers. This approach could be the right solution to overcome the main drawbacks that thermosets present while maintaining their good mechanical and thermal performance which make them indispensable for high performance applications.

This special issue aims to compile recent advances in Reprocessable, Repairable and Recyclable Polymers and Composites. Original research papers and reviews are welcome.

Topics include:

  • Synthesis of sustainable thermosets.
  • Synthesis of new vitrimers.
  • Competitiveness, functionality and sustainability of Reprocessable, Repairable and Recyclable Polymers and Composites.
  • New associative/dissociative dynamic bonds for the preparation of Reprocessable and Recyclable Polymers and Composites
  • Characterization methods of vitrimer or CAN materials
  • Structure-property relationship of Reprocessable and Recyclable Polymers and Composites
  • Creep performance of vitrimer or CAN materials
  • Self-structural monitoring techniques
  • Simulation of dynamics of CAN or vitrimer materials
  • Biobased Reprocessable and Recyclable Polymers and Composites.
  • Recycling of composites

Dr. Alaitz Ruiz de Luzuriaga
Dr. Genua Aratz
Dr. Itxaso Azcune
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

  • recyclable composites
  • sustainable fiber reinforced polymers
  • vitrimer
  • covalent adaptable network
  • biobased composites

Published Papers (2 papers)

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Research

10 pages, 3217 KiB  
Article
Thermally Mendable Self-Healing Epoxy Coating for Corrosion Protection in Marine Environments
by Eugenio Amendola, Barbara Palmieri, Stefania Dello Iacono and Alfonso Martone
Materials 2023, 16(5), 1775; https://doi.org/10.3390/ma16051775 - 21 Feb 2023
Cited by 5 | Viewed by 1501
Abstract
Polymeric coatings represent a well-established protection system that provides a barrier between a metallic substrate and the environment. The development of a smart organic coating for the protection of metallic structures in marine and offshore applications is a challenge. In the present study, [...] Read more.
Polymeric coatings represent a well-established protection system that provides a barrier between a metallic substrate and the environment. The development of a smart organic coating for the protection of metallic structures in marine and offshore applications is a challenge. In the present study, we investigated the use of self-healing epoxy as an organic coating suitable for metallic substrates. The self-healing epoxy was obtained by mixing Diels–Alder (D–A) adducts with a commercial diglycidyl ether of bisphenol-A (DGEBA) monomer. The resin recovery feature was assessed through morphological observation, spectroscopic analysis, and mechanical and nanoindentation tests. Barrier properties and anti-corrosion performance were evaluated through electrochemical impedance spectroscopy (EIS). The film on a metallic substrate was scratched and subsequently repaired using proper thermal treatment. The morphological and structural analysis confirmed that the coating restored its pristine properties. In the EIS analysis, the repaired coating exhibited diffusive properties similar to the pristine material, with a diffusivity coefficient of 1.6 × 10−6 cm2/s (undamaged system 3.1 × 10−6 cm2/s), confirming the restoration of the polymeric structure. These results reveal that a good morphological and mechanical recovery was achieved, suggesting very promising applications in the field of corrosion-resistant protective coatings and adhesives. Full article
(This article belongs to the Special Issue Reprocessable, Repairable and Recyclable Polymers and Composites)
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15 pages, 6527 KiB  
Article
Improving Polypropylene Matrix Composites Reinforced with Aligned Hemp Fibre Mats Using High Fibre Contents
by Tom Sunny and Kim L. Pickering
Materials 2022, 15(16), 5587; https://doi.org/10.3390/ma15165587 - 15 Aug 2022
Cited by 5 | Viewed by 1393
Abstract
The main goal of this study was to improve the mechanical performance of polypropylene (PP) matrix composites through high hemp fibre content. In order to achieve high fibre content, the possibilities of different polymer sheet thicknesses and stacking arrangements were investigated. It was [...] Read more.
The main goal of this study was to improve the mechanical performance of polypropylene (PP) matrix composites through high hemp fibre content. In order to achieve high fibre content, the possibilities of different polymer sheet thicknesses and stacking arrangements were investigated. It was found that decreasing the overall thickness of fibre mats between two polymer sheets within the stacking arrangements of composites and so decreasing the distance the polymer needs to travel improved the fibre wetting and therefore improved the tensile properties. The strongest composite produced had a fibre content of about 60 wt%. At this fibre content, tensile strength and Young’s modulus of the composites were found to be 3.0 and 6.9 times, respectively, higher than the control samples (polymer only samples), while figures for flexural strength and flexural modulus were 3.4 and 3.6, respectively. Full article
(This article belongs to the Special Issue Reprocessable, Repairable and Recyclable Polymers and Composites)
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