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Polymers
Special Issues
Stabilization of Bio-Based Polymeric Materials
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Stabilization of Bio-Based Polymeric Materials

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

Deadline for manuscript submissions: closed (10 October 2022) | Viewed by 10608

Special Issue Editors

Dr. Urška Vrabič-Brodnjak

E-Mail Website
Guest Editor
Department of Textiles, Graphic Arts and Design, Faculty of Natural Sciences and Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
Interests: natural fibers; paper fibers; textile fibers; packaging materials; bio-based materials; fiber analysis; sustainability
Special Issues, Collections and Topics in MDPI journals
Dr. Brigita Tomšič

E-Mail Website
Guest Editor
Department of Textiles Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
Interests: textile; antibacterial properties; stimuli responsive

Special Issue Information

Dear Colleagues,

Ecological requirements play an important role in the development of stabilizers for polymers, especially bio-based ones. The field of polymer degradation and stabilization remains an area of considerable industrial interest, supported by related research activities. Basic principles are often used to explain the stabilization mechanisms of chemical additives capable of slowing down degradation processes of organic and especially polymeric materials. The increasing interest in polymeric materials is partly due to their often relatively inexpensive and simple synthesis, and partly due to the possibility of obtaining a wide range of properties and functionalities. Due to the increasing use of bio-based materials in many fields, such as packaging, the degradation, stability, and ecological impact in a broader aspect is very important.

Therefore, a deep understanding of the chemical, physical, and biological relationships is of great importance for the performance and development of any polymer-based product. Both original contributions and comprehensive reviews are welcome.

This Special Issue is dedicated to the latest research on these topics and covers all aspects of stabilization of broad-based bio-based polymeric materials.

Potential topics include but are not limited to the following:

  • Stabilization of bio-based polymeric materials;
  • Degradation of bio-based polymeric materials;
  • Chemical additives for bio-based polymeric materials;
  • Analysis of bio-based polymeric materials;
  • Bio-based polymeric materials;
  • Packaging materials;
  • Biodegradability of polymeric materials;
  • Ecology.

Dr. Urška Vrabič-Brodnjak
Dr. Brigita Tomšič
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. 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

  • Stabilization
  • Degradation
  • Chemical additives
  • Packaging materials
  • Biodegradability
  • Ecology

Published Papers (4 papers)

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Research

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14 pages, 1499 KiB  
Article
Digestibility Kinetics of Polyhydroxyalkanoate and Poly(butylene succinate-co-adipate) after In Vitro Fermentation in Rumen Fluid
by Hailey Galyon, Samuel Vibostok, Jane Duncan, Gonzalo Ferreira, Abby Whittington, Kirk Havens, Jason McDevitt and Rebecca Cockrum
Polymers 2022, 14(10), 2103; https://0-doi-org.brum.beds.ac.uk/10.3390/polym14102103 - 21 May 2022
Cited by 3 | Viewed by 2019
Abstract
Using polyhydroxyalkanoate (PHA) materials for ruminal boluses could allow for longer sustained release of drugs and hormones that would reduce administration time and unneeded animal discomfort caused by continuous administration. The objective of this study was to determine ruminal degradability and kinetics of [...] Read more.
Using polyhydroxyalkanoate (PHA) materials for ruminal boluses could allow for longer sustained release of drugs and hormones that would reduce administration time and unneeded animal discomfort caused by continuous administration. The objective of this study was to determine ruminal degradability and kinetics of biodegradable polymers and blends. A proprietary PHA-based polymer, poly(butylene succinate-co-adipate) (PBSA), PBSA:PHA melt blends, and forage controls were incubated in rumen fluid for up to 240 h. Mass loss was measured after each incubation time, and digestion kinetic parameters were estimated. Thermogravimetric, differential scanning calorimetry, and intrinsic viscosity analyses were conducted on incubated samples. Generally, across treatments, mass loss was significant by 96 h with a minimum increase of 0.25% compared to 0 h but did not change thereafter. Degradation kinetics demonstrated that polymer treatments were still in the exponential degradation phase at 240 h with a maximum disappearance rate of 0.0031 %/h. Melting temperature increased, onset thermal degradation temperature decreased, and intrinsic viscosity decreased with incubation time, indicating structural changes to the polymers. Based on these preliminary findings, the first stage of degradation occurs within 24 h and PHA degrades slowly. However, further ruminal degradation studies of biodegradable polymers are warranted to elucidate maximum degradation and its characteristics. Full article
(This article belongs to the Special Issue Stabilization of Bio-Based Polymeric Materials)
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13 pages, 1054 KiB  
Article
Organosolv Lignin Barrier Paper Coatings from Waste Biomass Resources
by Gregor Lavrič, Aleksandra Zamljen, Janja Juhant Grkman, Edita Jasiukaitytė-Grojzdek, Miha Grilc, Blaž Likozar, Diana Gregor-Svetec and Urška Vrabič-Brodnjak
Polymers 2021, 13(24), 4443; https://0-doi-org.brum.beds.ac.uk/10.3390/polym13244443 - 17 Dec 2021
Cited by 8 | Viewed by 3114
Abstract
The aim of the study was to isolate lignin from organosolv, beech tree (Fagus sylvatica), and Japanese knotweed (Reynoutria japonica), to use it for paper surface and to replace part of the non-renewable product resources with bio-based ones. A [...] Read more.
The aim of the study was to isolate lignin from organosolv, beech tree (Fagus sylvatica), and Japanese knotweed (Reynoutria japonica), to use it for paper surface and to replace part of the non-renewable product resources with bio-based ones. A total of nine coated samples with different lignin formulations and starch were compounded, prepared, and evaluated. The basic (grammage, thickness, specific density), mechanical (elongation at break, tensile, burst and tear indices), and barrier properties (contact angle, water penetration, water vapour permeability, kit test) of the coated papers were investigated. The analysis showed no significant difference in tensile properties between uncoated and coated samples. Furthermore, the decrease in water vapour transmission rate and the lower contact angle for coated samples were nevertheless confirmed. The novel coating materials show promising products with very good barrier properties. Finally, the correlation between structural, morphological, and (other) natural lignin-based factors was revealed, highlighting the importance of parameters such as the equivalence ratio of aliphatic and phenolic hydroxyl groups or the average molecular weight. Tuning functionality by design could optimise performance in the future. Full article
(This article belongs to the Special Issue Stabilization of Bio-Based Polymeric Materials)
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13 pages, 3782 KiB  
Article
Thermo Compression of Thermoplastic Agar-Xanthan Gum-Carboxymethyl Cellulose Blend
by Smarak Bandyopadhyay, Tomáš Sáha, Daniel Sanétrník, Nabanita Saha and Petr Sáha
Polymers 2021, 13(20), 3472; https://0-doi-org.brum.beds.ac.uk/10.3390/polym13203472 - 10 Oct 2021
Cited by 4 | Viewed by 1897
Abstract
There is a gap in the literature for the preparation of agar-xanthan gum-carboxymethyl cellulose-based films by thermo compression methods. The present work aims to fill this gap by blending the polysaccharides in a plastograph and preparation of films under high pressure and temperature [...] Read more.
There is a gap in the literature for the preparation of agar-xanthan gum-carboxymethyl cellulose-based films by thermo compression methods. The present work aims to fill this gap by blending the polysaccharides in a plastograph and preparation of films under high pressure and temperature for a short duration of time. The pivotal aim of this work is also to know the effect of different mixing conditions on the physical, chemical, mechanical and thermal properties of the films. The films are assessed based on results from microscopic, infrared spectroscopic, permeability (WVTR), transmittance, mechanical, rheological and thermogravimetric analysis. The results revealed that the mixing volume and mixing duration had negative effects on the films’ transparency. WVTR was independent of the mixing conditions and ranged between 1078 and 1082 g/m2·d. The mixing RPM and mixing duration had a positive effect on the film tensile strength. The films from the blends mixed at higher RPM for a longer time gave elongation percentage up to 78%. Blending also altered the crystallinity and thermal behavior of the polysaccharides. The blend prepared at 80 RPM for 7 min and pressed at 140 °C showed better percent elongation and light barrier properties. Full article
(This article belongs to the Special Issue Stabilization of Bio-Based Polymeric Materials)
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Review

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21 pages, 1507 KiB  
Review
Advances and Classification of Cyclodextrin-Based Polymers for Food-Related Issues
by Adrián Matencio, Alberto Rubin Pedrazzo, Alessandro Difalco, Silvia Navarro-Orcajada, Yousef Khazeai Monfared, Irene Conesa, Azam Rezayat, José Manuel López-Nicolás and Francesco Trotta
Polymers 2021, 13(23), 4226; https://0-doi-org.brum.beds.ac.uk/10.3390/polym13234226 - 02 Dec 2021
Cited by 11 | Viewed by 2586
Abstract
Cyclodextrins (CDs) are a good alternative to reduce or enhance different biomolecule characteristics and have demonstrated great results in food science. However, CDs present intrinsic limitations that can be solved by derivative synthesis. This review represents a survey of the state of the [...] Read more.
Cyclodextrins (CDs) are a good alternative to reduce or enhance different biomolecule characteristics and have demonstrated great results in food science. However, CDs present intrinsic limitations that can be solved by derivative synthesis. This review represents a survey of the state of the art of CD-based materials and their uses in food science. A deep review of the structure is carried out and different groups for ordination are suggested. After that, different applications such as cholesterol complexation or its use as sensors are reviewed. The derivatives show novel and promising activities for the industry. A critical perspective of the materials suggests that they might not present toxicity, although more studies are required. These points suggest that the research in this field will be increased in the following years. Full article
(This article belongs to the Special Issue Stabilization of Bio-Based Polymeric Materials)
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