Special Issue "Functional Chitosan-Based Composites"

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Biobased and Biodegradable Polymers".

Deadline for manuscript submissions: 30 September 2020.

Special Issue Editors

Dr. Luminita Marin
Website
Guest Editor
“Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
Interests: Chitosan; hydrogels; films; fibers; imines; supramolecular chemistry; liquid crystals
Prof. Maria Bardosova
Website
Guest Editor
Tyndall National Institute University College Cork - National University of Ireland, Cork, Ireland
Interests: Chitosan; hybrid materials; photonic crystals; sensors; thin organic films; Langmuir-Blodgett technique

Special Issue Information

Dear Colleagues,

Technological development has been one of the defining factors of our contemporary world. Unfortunately, sometimes new technologies seem to be accompanied by dramatic side effects on both the environment and human health. Limiting such hazards is an active area of research, and the use of renewable resources for a variety of materials applications is now a major consideration in terms of hazard mitigation.

Chitosan is a sustainable biopolymer prepared from the renewable resource chitin. Among the various  biopolymers known, it stands out because of its wide array of  beneficial properties which prompt its use in many different  applications. For example, it is non-toxic, biocompatible, biodegradable, consumer-safe and often displays superior material and functional properties as compared to other biopolymers. It can be used for the preparation of a large variety of materials types, such as hydrogels, fibres, nanostructures and films and coatings, which can then be further applied in diverse fields such as medicine, food packaging, environmental protection, cosmetics, agriculture, textiles, paper industry and so on. 

The aim of this Special Issue is to present the latest developments in the field of chitosan biomaterials and their current or potential applications in, but not limited to, the areas mentioned above.

Prof. Luminita Marin
Prof. Maria Bardosova
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 papers will be 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 monthly 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 1800 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

  • chitosan
  • hydrogels
  • films
  • coatings
  • fibres
  • nanostructures
  • formulations

Published Papers (4 papers)

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Research

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Open AccessFeature PaperArticle
Development and Performance of Bioactive Compounds-Loaded Cellulose/Collagen/Polyurethane Materials
Polymers 2020, 12(5), 1191; https://doi.org/10.3390/polym12051191 - 23 May 2020
Abstract
Here we present a new biomaterial based on cellulose, collagen and polyurethane, obtained by dissolving in butyl imidazole chloride. This material served as a matrix for the incorporation of tannin and lipoic acid, as well as bioactive substances with antioxidant properties. The introduction [...] Read more.
Here we present a new biomaterial based on cellulose, collagen and polyurethane, obtained by dissolving in butyl imidazole chloride. This material served as a matrix for the incorporation of tannin and lipoic acid, as well as bioactive substances with antioxidant properties. The introduction of these bioactive principles into the base matrix led to an increase of the compressive strength in the range 105–139 kPa. An increase of 29.85% of the mucoadhesiveness of the film containing tannin, as compared to the reference, prolongs the bioavailability of the active substance; a fact also demonstrated by the controlled release studies. The presence of bioactive principles, as well as tannins and lipoic acid, gives biomaterials an antioxidant capacity on average 40%–50% higher compared to the base matrix. The results of the tests of the mechanical resistance, mucoadhesiveness, bioadhesiveness, water absorption and antioxidant capacity of active principles recommend these biomaterials for the manufacture of cosmetic masks or patches. Full article
(This article belongs to the Special Issue Functional Chitosan-Based Composites)
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Open AccessArticle
Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature
Polymers 2020, 12(5), 1125; https://doi.org/10.3390/polym12051125 - 14 May 2020
Abstract
Chitosan-sulfated titania composite membranes were prepared, characterized, and evaluated for potential application as polymer electrolyte membranes. To improve the chemical stability, the membranes were cross-linked using sulfuric acid, pentasodium triphosphate, and epoxy-terminated polydimethylsiloxane. Differences in membranes’ structure, thickness, morphology, mechanical, and thermal properties [...] Read more.
Chitosan-sulfated titania composite membranes were prepared, characterized, and evaluated for potential application as polymer electrolyte membranes. To improve the chemical stability, the membranes were cross-linked using sulfuric acid, pentasodium triphosphate, and epoxy-terminated polydimethylsiloxane. Differences in membranes’ structure, thickness, morphology, mechanical, and thermal properties prior and after cross-linking reactions were evaluated. Membranes’ water uptake capacities and their chemical stability in Fenton reagent were also studied. As proved by dielectric spectroscopy, the conductivity strongly depends on cross-linker nature and on hydration state of membranes. The most encouraging results were obtained for the chitosan-sulfated titania membrane cross-linked with sulfuric acid. This hydrated membrane attained values of proton conductivity of 1.1 × 10−3 S/cm and 6.2 × 10−3 S/cm, as determined at 60 °C by dielectric spectroscopy and the four-probes method, respectively. Full article
(This article belongs to the Special Issue Functional Chitosan-Based Composites)
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Open AccessArticle
Dynamics and Rheological Behavior of Chitosan-Grafted-Polyacrylamide in Aqueous Solution upon Heating
Polymers 2020, 12(4), 916; https://doi.org/10.3390/polym12040916 - 15 Apr 2020
Abstract
In this work, the transformation of chitosan-grafted-polyacrylamide (GPAM) aggregates in aqueous solution upon heating was explored by cryo-electron microscope (cryo-TEM) and dynamic light scattering (DLS), and larger aggregates were formed in GPAM aqueous solution upon heating, which were responsible for the thermo-thickening behavior [...] Read more.
In this work, the transformation of chitosan-grafted-polyacrylamide (GPAM) aggregates in aqueous solution upon heating was explored by cryo-electron microscope (cryo-TEM) and dynamic light scattering (DLS), and larger aggregates were formed in GPAM aqueous solution upon heating, which were responsible for the thermo-thickening behavior of GPAM aqueous solution during the heating process. The heating initiates a transformation from H-bonding aggregates to a large-sized cluster formed by self-assembled hydrophobic chitosan backbones. The acetic acid (HAc) concentration has a significant effect on the thermo-thickening behavior of GPAM aqueous solution; there is a critical value of the concentration (>0.005 M) for the thermo-thickening of 10 mg/mL GPAM solution. The concentration of HAc will affect the protonation degree of GPAM, and affect the strength of the electrostatic repulsion between GPAM molecular segments, which will have a significant effect on the state of the aggregates in solution. Other factors that have an influence on the thermo-thickening behavior of GPAM aqueous solution upon heating were investigated and discussed in detail, including the heating rate and shear rate. Full article
(This article belongs to the Special Issue Functional Chitosan-Based Composites)
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Review

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Open AccessReview
Chitosan-Based Drug Delivery System: Applications in Fish Biotechnology
Polymers 2020, 12(5), 1177; https://doi.org/10.3390/polym12051177 - 21 May 2020
Abstract
Chitosan is increasingly used for safe nucleic acid delivery in gene therapy studies, due to well-known properties such as bioadhesion, low toxicity, biodegradability and biocompatibility. Furthermore, chitosan derivatization can be easily performed to improve the solubility and stability of chitosan–nucleic acid polyplexes, and [...] Read more.
Chitosan is increasingly used for safe nucleic acid delivery in gene therapy studies, due to well-known properties such as bioadhesion, low toxicity, biodegradability and biocompatibility. Furthermore, chitosan derivatization can be easily performed to improve the solubility and stability of chitosan–nucleic acid polyplexes, and enhance efficient target cell drug delivery, cell uptake, intracellular endosomal escape, unpacking and nuclear import of expression plasmids. As in other fields, chitosan is a promising drug delivery vector with great potential for the fish farming industry. This review highlights state-of-the-art assays using chitosan-based methodologies for delivering nucleic acids into cells, and focuses attention on recent advances in chitosan-mediated gene delivery for fish biotechnology applications. The efficiency of chitosan for gene therapy studies in fish biotechnology is discussed in fields such as fish vaccination against bacterial and viral infection, control of gonadal development and gene overexpression and silencing for overcoming metabolic limitations, such as dependence on protein-rich diets and the low glucose tolerance of farmed fish. Finally, challenges and perspectives on the future developments of chitosan-based gene delivery in fish are also discussed. Full article
(This article belongs to the Special Issue Functional Chitosan-Based Composites)
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