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Polymers
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Functional Chitosan-Based Composites III
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Functional Chitosan-Based Composites III

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

Deadline for manuscript submissions: 30 April 2024 | Viewed by 6313

Special Issue Editors

Dr. Luminita Marin

E-Mail Website
Guest Editor
“Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, 700487 Iasi, Romania
Interests: hydrogels; imine; chitosan; Schiff base; phenothiazine; azomethine; drug delivery
Special Issues, Collections and Topics in MDPI journals
Dr. Maria Bardosova

E-Mail Website
Guest Editor
Tyndall National Institute, Lee Maltings, Dyke Parade, Cork, Ireland
Interests: chitosan; hybrid materials; photonic crystals; sensors; thin organic films; Langmuir-Blodgett technique
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

Technological development has been one of the most defining aspects of our contemporary world. However, new technologies often have dramatic side effects on both the environment and human health. Thus, the prevention of such hazards is an active area of research, and the use of renewable resources for a variety of material applications is now a major consideration in hazard mitigation.

Chitosan is a sustainable biopolymer prepared from the renewable resource chitin. Among the various known biopolymers, it stands out because of its vast beneficial properties which encourage its use in many different applications. For example, it is non-toxic, biocompatible, biodegradable, consumer safe and often displays superior material and functional properties compared to other biopolymers. It can be used in the preparation of a large variety of material 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.

Dr. Luminita Marin
Dr. 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 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

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

Published Papers (4 papers)

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Research

22 pages, 5932 KiB  
Article
Self-Assembled Chitosan/Dialdehyde Carboxymethyl Cellulose Hydrogels: Preparation and Application in the Removal of Complex Fungicide Formulations from Aqueous Media
by Claudiu-Augustin Ghiorghita, Maria Marinela Lazar, Luminita Ghimici and Maria Valentina Dinu
Polymers 2023, 15(17), 3496; https://doi.org/10.3390/polym15173496 - 22 Aug 2023
Cited by 1 | Viewed by 1112
Abstract
Environmental contamination with pesticides occurs at a global scale as a result of prolonged usage and, therefore, their removal by low-cost and environmentally friendly systems is actively demanded. In this context, our study was directed to investigate the feasibility of using some self-assembled [...] Read more.
Environmental contamination with pesticides occurs at a global scale as a result of prolonged usage and, therefore, their removal by low-cost and environmentally friendly systems is actively demanded. In this context, our study was directed to investigate the feasibility of using some self-assembled hydrogels, comprising chitosan (CS) and carboxymethylcellulose (CMC) or dialdehyde (DA)-CMC, for the removal of four complex fungicide formulations, namely Melody Compact (MC), Dithane (Dt), Curzate Manox (CM), and Cabrio®Top (CT). Porous CS/CMC and CS/DA-CMC hydrogels were prepared as discs by combining the semi-dissolution acidification sol-gel transition method with a freeze-drying approach. The obtained CS/CMC and CS/DA-CMC hydrogels were characterized by gel fraction yield, FTIR, SEM, swelling kinetics, and uniaxial compression tests. The batch-sorption studies indicated that the fungicides’ removal efficiency (RE%) by the CS/CMC hydrogels was increased significantly with increasing sorbent doses reaching 94%, 93%, 66% and 48% for MC, Dt, CM and CT, respectively, at 0.2 g sorbent dose. The RE values were higher for the hydrogels prepared using DA-CMC than for those prepared using non-oxidized CMC when initial fungicide concentrations of 300 mg/L or 400 mg/L were used. Our results indicated that CS/DA-CMC hydrogels could be promising biosorbents for mitigating pesticide contamination of aqueous environments. Full article
(This article belongs to the Special Issue Functional Chitosan-Based Composites III)
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18 pages, 3533 KiB  
Article
Dextran-Chitosan Composites: Antioxidant and Anti-Inflammatory Properties
by Anca Roxana Petrovici, Narcis Anghel, Maria Valentina Dinu and Iuliana Spiridon
Polymers 2023, 15(9), 1980; https://doi.org/10.3390/polym15091980 - 22 Apr 2023
Cited by 7 | Viewed by 1645
Abstract
This study presents the development of new formulations consisting of dextran (Dex) and chitosan (Ch) matrices, with fillings such as chitosan stearate (MCh), citric acid, salicylic acid, or ginger extract. These materials were characterized using Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), [...] Read more.
This study presents the development of new formulations consisting of dextran (Dex) and chitosan (Ch) matrices, with fillings such as chitosan stearate (MCh), citric acid, salicylic acid, or ginger extract. These materials were characterized using Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and mechanical tests, and evaluated for antioxidant properties, including scavenging activities, metal chelation, and ferric ion reducing power, as well as anti-inflammatory properties, measuring the binding affinity between serum albumin and the bioactive substances, which can influence their bioavailability, transport, and overall anti-inflammatory effect. Compounds in ginger such as 6-gingerol reduce inflammation by inhibiting the production of inflammatory substances, such as prostaglandin, cytokines, interleukin-1β, and pro-inflammatory transcription factor (NF-κB) and, alongside citric and salicylic acids, combat oxidative stress, stabilizes cell membranes, and promote membrane fluidity, thereby preserving membrane integrity and function. Incorporating chitosan stearate in chitosan:dextran samples created a dense, stiff film with an elastic modulus approximately seventeen times higher than for the chitosan:dextran matrix. The Dex:Ch:MCh sample exhibited low compressibility at 48.74 ± 1.64 kPa, whereas the Dex:Ch:MCh:citric acid:salicylic acid composite had a compact network, allowing for 70.61 ± 3.9% compression at 109.30 kPa. The lipid peroxidation inhibitory assay revealed that Dex:Ch:MCh:citric acid had the highest inhibition value with 83 ± 0.577% at 24 h. The study highlights that adding active substances like ginger extract and citric acid to Dex:Ch composites enhances antioxidant properties, while modified chitosan improves mechanical properties. These composites may have potential medical applications in repairing cell membranes and regulating antioxidant enzyme activities. Full article
(This article belongs to the Special Issue Functional Chitosan-Based Composites III)
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18 pages, 5022 KiB  
Article
Development of Hybrid Materials Based on Chitosan, Poly(Ethylene Glycol) and Laponite® RD: Effect of Clay Concentration
by Simona Morariu, Cristina-Eliza Brunchi, Mirela Honciuc and Manuela-Maria Iftime
Polymers 2023, 15(4), 841; https://doi.org/10.3390/polym15040841 - 08 Feb 2023
Cited by 4 | Viewed by 1687
Abstract
In the context of increasing interest in biomaterials with applicability in cosmetics and medicine, this research aims to obtain and characterize some hybrid materials based on chitosan (CS) (antibacterial, biocompatible, and biodegradable), poly(ethylene glycol) (PEG) (non-toxic and prevents the adsorption of protein and [...] Read more.
In the context of increasing interest in biomaterials with applicability in cosmetics and medicine, this research aims to obtain and characterize some hybrid materials based on chitosan (CS) (antibacterial, biocompatible, and biodegradable), poly(ethylene glycol) (PEG) (non-toxic and prevents the adsorption of protein and cell) and Laponite® RD (Lap) (bioactive). The rheological properties of the starting dispersions were investigated and discussed related to the interactions developed between components. All samples exhibited gel-like properties, and the storage modulus of CS/PEG dispersion increased from 6.6 Pa to 657.7 Pa by adding 2.5% Lap. Structural and morphological characterization of the films, prepared by solution casting method, was performed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and polarized light microscopy (POM). These analyses proved the incorporation of Lap into CS/PEG films and revealed the morphological changes of the films by the addition of clay. Thereby, at the highest Lap concentration (43.8%), the “house of cards” structure formed by Lap platelets, which incorporate chitosan chains, as evidenced by SEM and POM. Two stages of degradation between 200 °C and 410 °C were evidenced for the films with Lap concentration higher than 38.5%, explained by the existence of a clay-rich phase (given by the clay network) and chitosan-rich one (due to the intercalation of chitosan in the clay network). CS/PEG film with 43.8% Lap showed the highest swelling degree of 240.7%. The analysis of the obtained results led to the conclusion that the addition of clay to the CS/PEG films increases their stability in water and gives them greater thermal stability. Full article
(This article belongs to the Special Issue Functional Chitosan-Based Composites III)
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15 pages, 9158 KiB  
Article
New Hydrogels and Formulations Based on Piperonyl-Imino-Chitosan Derivatives
by Daniela Ailincai and Irina Rosca
Polymers 2023, 15(3), 753; https://doi.org/10.3390/polym15030753 - 01 Feb 2023
Cited by 1 | Viewed by 1170
Abstract
Candida infections have been always a serious healcare related problem. The present study reports the preparation of hydrogels and formulations based on piperonyl-imino-chitosan derivatives and Amphotericin B drug for the treatment of Candida infections. The hydrogels were obtained by the imination reaction of [...] Read more.
Candida infections have been always a serious healcare related problem. The present study reports the preparation of hydrogels and formulations based on piperonyl-imino-chitosan derivatives and Amphotericin B drug for the treatment of Candida infections. The hydrogels were obtained by the imination reaction of chitosan with piperonal monoaldehyde, followed by the self-assembling of the resulted imines, while the formulations were obtained by an in situ hydrogelation method of chitosan with piperonal in the presence of Amphotericin B antifungal drug. The structural characterization of both hydrogels and formulations by Fourier transform infrared spectroscopy and Nuclear magnetic resonance spectroscopy revealed the formation of imine units between the reagents, while their supramolecular characterization using polarized optical microscopy and wide angle X-ray diffraction demonstrated that hydrophilic/hydrophobic segregation is the process which governed the formation of gel like systems. The systems were further investigated from the point of view of their further applications revealing that they were biodegradable, presented high swelling ability and were able to release the antifungal drug in a sustained manner, presenting promising antifungal activity against five Candida strains. Full article
(This article belongs to the Special Issue Functional Chitosan-Based Composites III)
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