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Materials
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Mechanical Properties and Recycling of Biopolymer Composites
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Mechanical Properties and Recycling of Biopolymer Composites

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

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 4584

Special Issue Editor

Prof. Dr. Stanisław Kuciel

E-Mail Website
Guest Editor
Faculty of Materials Engineering and Physics, Cracow University of Technology, Jana Pawla II 37, 37-864 Krakow, Poland
Interests: thermoplastic polymer composites; natural fibers; bio-based polymers; recycling of plastics and composites

Special Issue Information

Dear Colleagues,

In this Special Issue, we will collect manuscripts that deepen our knowledge about polymer biocomposites, their mechanical properties, and the possible methods of reducing their negative impact on the environment (recycling). Works that expand the subject of bio-based and biodegradable polymer composites reinforced with natural fibers with high mechanical properties are very welcome. The development and research of new natural fiber modifications to enhance matrix–filler interactions are particularly encouraged. Moreover, in-depth description and analysis of the existing recycling methods and mechanisms as well as new efficient methods of utilizing polymer composites waste are welcome.

In this Special Issue, new application trends in the field of biodegradable and renewable polymers will be analyzed in terms of the production of new composites and the study of their physicomechanical properties and recycling options.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dr. Stanisław Kuciel
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

  • biopolymers
  • biocomposites
  • polymers from renewable sources
  • recycling
  • mechanical properties
  • natural fillers

Published Papers (2 papers)

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Research

14 pages, 3059 KiB  
Article
Analysis of the Effect of Photo and Hydrodegradation on the Surface Morphology and Mechanical Properties of Composites Based on PLA and PHI Modified with Natural Particles
by Karolina E. Mazur, Patrycja Bazan, Aneta Liber-Kneć, Julia Stępień, Alan Puckowski, Adrian Mirowski and Stanisław Kuciel
Materials 2022, 15(3), 878; https://doi.org/10.3390/ma15030878 - 24 Jan 2022
Viewed by 2370
Abstract
Biodegradable polymer materials are increasingly used in the packaging industry due to their good properties and low environmental impact. Therefore, the work was performed on the injection molding of the bio-based composites of polylactide (PLA) and polyhydroxyalcanates (PHI) modified with two phases: reinforcing [...] Read more.
Biodegradable polymer materials are increasingly used in the packaging industry due to their good properties and low environmental impact. Therefore, the work was performed on the injection molding of the bio-based composites of polylactide (PLA) and polyhydroxyalcanates (PHI) modified with two phases: reinforcing (walnut shell flour and cellulose) and coloring (beta carotene and anthocyanin). The produced materials were subjected to wide mechanical characteristics—tensile, flexural, and fatigue tests. Additionally, the influence of photo and hydrodegradation on the change of the surface structure and mechanical properties of the composites was assessed. The addition of natural fillers contributed to the improvement of the stiffness of the tested composites. PHI composites withstood a higher number of cycles during cyclic loading, but the stress values obtained in the static tensile test were higher for PLA composites. Moreover, a clear change of color was observed after both the photo and hydrodegradation process for all tested materials; however, after the degradation processes, the filler-modified materials underwent greater discoloration. For the composites based on PHI, the type of degradation did not affect the mechanical properties. On the other hand, for PLA composites, hydrolytic degradation contributed to a higher decrease in properties—the decrease in tensile strength for unmodified PLA after photodegradation was 4%, while after hydrodegradation it was 24%. Full article
(This article belongs to the Special Issue Mechanical Properties and Recycling of Biopolymer Composites)
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10 pages, 2816 KiB  
Article
Mechanical Properties of Polylactide Admixed with Carbon Nanotubes or Graphene Nanopowder
by Piotr Szatkowski, Leszek Czechowski, Jacek Gralewski and Martyna Szatkowska
Materials 2021, 14(20), 5955; https://doi.org/10.3390/ma14205955 - 11 Oct 2021
Cited by 7 | Viewed by 1661
Abstract
The aim of this work was to verify the material properties of polylactic acid (PLA) with an addition of carbon nanotubes (CNTs) or graphene nanopowder (GNP). The pure polylactide and admixed polylactide samples were subjected to chemical–physical tests to determine their stiffness and [...] Read more.
The aim of this work was to verify the material properties of polylactic acid (PLA) with an addition of carbon nanotubes (CNTs) or graphene nanopowder (GNP). The pure polylactide and admixed polylactide samples were subjected to chemical–physical tests to determine their stiffness and strength parameters. The tensile and impact tests were performed on samples without UV (ultraviolet) treatment and after UV treatment, in a physiological saline solution. The investigations were composed of two stages. The first one was related to the examination of the properties of pure polylactide, denoted as the following: 3001D, 4032D, and 4043D. The second stage was based on an analysis of the properties of PLA 4032D with an admixture of GNP or CNTs, at 0.1 wt.% and 0.5 wt.%. By comparing the strength and the stiffness of pure samples with samples with the considered admixtures, an essential increase was not observed. However, it is stated that the presence of GNP and CNTs in the samples positively influenced the resistance of the materials to the ageing process. Full article
(This article belongs to the Special Issue Mechanical Properties and Recycling of Biopolymer Composites)
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