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Polymers
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Advances in Chitosan Composites
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Advances in Chitosan Composites

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

Deadline for manuscript submissions: closed (30 January 2023) | Viewed by 5923

Special Issue Editors

Dr. Carmen Pilar Jiménez Gómez

E-Mail Website
Guest Editor
Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, Spain
Interests: characterization; hydrotalcites; clay minerals; catalysis; biomass valorization
Special Issues, Collections and Topics in MDPI journals
Dr. Juan Antonio Cecilia

E-Mail Website
Guest Editor
Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, Spain
Interests: adsorption; biomass valorization; heterogeneous catalysis; high-added value products
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Chitosan is traditionally prepared from chitin-containing fishery processing (shrimp shells, crab shells, and squid pens) through various procedures, including chemical, enzymatic, and microbial treatments. In a second step, chitin is deacetylated to form chitosan. Compared to synthetic polymers, chitosan has the advantages of being biocompatible, biodegradable and sustainable. Moreover, the use of chitosan nanoparticles offers many advantages because chitosan is non-toxic and does not require any hazardous solvents. In addition, chitosan-based materials have been developed due to their particular chemical properties, which provide it with a wide range of applications in bio-medicine, cosmetics (skin, bone, tissue engineering, artificial kidneys, nerves, livers, wound healing), the chemical industry (as a catalyst or can be used as a starting molecule to obtain high added value products), the food industry, and the environmental field. In the past few decades, a very large number of basic and application works have been carried out to depict the structure and the potentiality of these bio-polymers. In fact, the number of new studies devoted to these topics is still high nowadays, indicating a constant vivid interest regarding chitin and chitosan science. The aim of this Special Issue is dedicated to recent novel and innovative contributions in the field of advances in chitosan composites, as well as their various physical and chemical applications in green industry fields.

Dr. Carmen Pilar Jiménez Gómez
Dr. Juan Antonio Cecilia
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
  • biomaterial
  • adsorbent
  • functionality
  • catalyst
  • high added value product
  • chitosan polymer design and characterization
  • composites

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Published Papers (3 papers)

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Research

26 pages, 10592 KiB  
Article
Calcium Phosphates–Chitosan Composite Layers Obtained by Combining Radio-Frequency Magnetron Sputtering and Matrix-Assisted Pulsed Laser Evaporation Techniques
by Maria Elena Zarif, Sasa Alexandra Yehia-Alexe, Bogdan Bita, Irina Negut, Claudiu Locovei and Andreea Groza
Polymers 2022, 14(23), 5241; https://doi.org/10.3390/polym14235241 - 1 Dec 2022
Cited by 8 | Viewed by 1814
Abstract
In this work, we report the synthesis of calcium phosphate–chitosan composite layers. Calcium phosphate layers were deposited on titanium substrates by radio-frequency magnetron sputtering technique by varying the substrate temperature from room temperature (25 °C) up to 100 and 300 °C. Further, chitosan [...] Read more.
In this work, we report the synthesis of calcium phosphate–chitosan composite layers. Calcium phosphate layers were deposited on titanium substrates by radio-frequency magnetron sputtering technique by varying the substrate temperature from room temperature (25 °C) up to 100 and 300 °C. Further, chitosan was deposited by matrix-assisted pulsed laser evaporation technique on the calcium phosphate layers. The temperature at the substrate during the deposition process of calcium phosphate layers plays an important role in the embedding of chitosan, as scanning electron microscopy analysis showed. The degree of chitosan incorporation into the calcium phosphate layers significantly influence the physico-chemical properties and the adherence strength of the resulted layers to the substrates. For example, the decreases of Ca/P ratio at the addition of chitosan suggests that a calcium deficient hydroxyapatite structure is formed when the CaP layers are generated on Ti substrates kept at room temperature during the deposition process. The Fourier transform infrared spectroscopy analysis of the samples suggest that the PO43−/CO32− substitution is possible. The X-ray diffraction spectra indicated that the crystalline structure of the calcium phosphate layers obtained at the 300 °C substrate temperature is disturbed by the addition of chitosan. The adherence strength of the composite layers to the titanium substrates is diminished after the chitosan deposition. However, no complete exfoliation of the layers was observed. Full article
(This article belongs to the Special Issue Advances in Chitosan Composites)
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16 pages, 5505 KiB  
Article
Modification of the Textural Properties of Chitosan to Obtain Biochars for CO2-Capture Processes
by Isabel Barroso-Martín, Juan Antonio Cecilia, Enrique Vilarrasa-García, Daniel Ballesteros-Plata, Carmen Pilar Jiménez-Gómez, Álvaro Vílchez-Cózar, Antonia Infantes-Molina and Enrique Rodríguez-Castellón
Polymers 2022, 14(23), 5240; https://doi.org/10.3390/polym14235240 - 1 Dec 2022
Cited by 5 | Viewed by 1634
Abstract
Three chitosans with different morphologies have been used (commercial chitosan powder, chitosan in film form and chitosan in globular form synthesized by the freeze-dried method) for the synthesis of biochars. The pyrolytic treatment has revealed that the biochar synthesized from the chitosan formed [...] Read more.
Three chitosans with different morphologies have been used (commercial chitosan powder, chitosan in film form and chitosan in globular form synthesized by the freeze-dried method) for the synthesis of biochars. The pyrolytic treatment has revealed that the biochar synthesized from the chitosan formed by the freeze-dried method reaches the highest CO2-adsorption capacity (4.11 mmol/g at 0 °C and a pressure of 1 bar) due to this adsorbent is highly microporous. Moreover, this biochar is more resistant to the pyrolytic treatment in comparison to the biochars obtained from the commercial chitosan and chitosan in the form of film. CO2-adsorption studies at different temperatures have also shown that the adsorption capacity diminishes as the adsorption temperature increases, thus suggesting that the adsorption takes place by a physical process. Full article
(This article belongs to the Special Issue Advances in Chitosan Composites)
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11 pages, 1757 KiB  
Article
Chitosan-Based Nanoparticles for Cardanol-Sustained Delivery System
by Roberta Bussons Rodrigues Valério, Nilvan Alves da Silva, José Ribamar Paiva Junior, Anderson Valério Chaves, Bruno Peixoto de Oliveira, Nágila Freitas Souza, Selene Maia de Morais, José Cleiton Sousa dos Santos and Flávia Oliveira Monteiro da Silva Abreu
Polymers 2022, 14(21), 4695; https://doi.org/10.3390/polym14214695 - 3 Nov 2022
Cited by 5 | Viewed by 1860
Abstract
Cardanol, principal constituent of the technical cashew nut shell liquid, has applications as antioxidant and antibacterial, and these properties may be enhanced through encapsulation. In the present study, we isolated and purified cardanol, and nanoparticles (NPs) were produced by polyelectrolyte complexation using polysaccharide [...] Read more.
Cardanol, principal constituent of the technical cashew nut shell liquid, has applications as antioxidant and antibacterial, and these properties may be enhanced through encapsulation. In the present study, we isolated and purified cardanol, and nanoparticles (NPs) were produced by polyelectrolyte complexation using polysaccharide systems with chitosan, sodium alginate, and non-toxic Arabic gum, because they are biocompatible, biodegradable, and stable. We characterized the NPs for morphological, physicochemical, and antioxidant activity. The micrographs obtained revealed spherical and nanometric morphology, with 70% of the distribution ranging from 34 to 300 nm, presenting a bimodal distribution. The study of the spectra in the infrared region suggested the existence of physicochemical interactions and cross-links between the biopolymers involved in the encapsulated NPs. Furthermore, the NPs showed better antioxidant potential when compared to pure cardanol. Thus, the encapsulation of cardanol may be an effective method to maintain its properties, promote better protection of the active ingredient, minimize side effects, and can target its activities in specific locations, by inhibiting free radicals in various sectors such as pharmaceutical, nutraceutical, and biomedical. Full article
(This article belongs to the Special Issue Advances in Chitosan Composites)
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