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Polymers
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Advances in Polymer-Based Nanomaterials with Antibacterial Properties
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Advances in Polymer-Based Nanomaterials with Antibacterial Properties

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

Deadline for manuscript submissions: closed (15 July 2024) | Viewed by 9372

Special Issue Editors

Dr. Karen Esquivel Escalante

E-Mail Website
Guest Editor
Graduate and Research Division, Engineering Faculty, Universidad Autónoma de Querétaro, Cerro de las Campanas, Santiago de Querétaro 76010, Mexico
Interests: nanomaterials; composite materials; nanotoxicology
Special Issues, Collections and Topics in MDPI journals
Dr. Rodrigo Rafael Velázquez Castillo

E-Mail Website
Guest Editor
División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Queretaro, Mexico
Interests: polymers; composite materials; nanobiomaterials
Dr. Luis Antonio Ortiz Frade

E-Mail Website
Guest Editor
Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Querétaro, Mexico
Interests: molecular electrochemistry; nanochemistry; inorganic chemistry

Special Issue Information

Dear Colleagues,

Nanotechnology applications have grown in the past two decades, showing the advantages of using polymeric nanomaterials and polymeric nanocomposites with antibacterial properties specifically in environmental and biomedical areas. Current research is focused on the production of antimicrobial polymer-based non-toxic nanocomposite systems, and it is imperative to find more eco-friendly synthesis approaches.

This Special Issue is dedicated to exploring novel synthesis methods with low toxicity and without adverse impacts on the environment or human health, which will evolve into specific applications such as wastewater and air treatment, pathogen diseases control in agriculture, antibacterial control in foods, and the elimination of microorganisms in medical areas. Original research articles and reviews are welcome.

The main topics include but are not limited to:

  • Synthesis and characterization of polymeric nanomaterials and polymeric nanocomposites.
  • Synthesis and characterization of polymer-based non-cytotoxic nanocomposites.
  • Detailed applications in the environmental and biomedical areas of polymeric nanomaterials and polymeric nanocomposites.

Dr. Karen Esquivel Escalante
Dr. Rodrigo Rafael Velázquez Castillo
Dr. Luis Antonio Ortiz Frade
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

  • antibacterial
  • antimicrobial
  • biomedical applications
  • environmental applications
  • nanocomposites
  • nanoparticles
  • nanomaterials
  • polymeric structures
  • polymers
  • synthesis methods

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Published Papers (4 papers)

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Research

15 pages, 2653 KiB  
Article
Vitamin B Complex Encapsulation in Bacterial Nanocellulose: A Novel System for Heat and Chemical Stabilization in Food Products
by Diego Mauricio Sánchez-Osorno, Sandra L. Amaya-Bustos, Carlos Molina-Ramírez, María Camila López-Jaramillo and Julián Paul Martínez-Galán
Polymers 2024, 16(21), 2961; https://doi.org/10.3390/polym16212961 - 22 Oct 2024
Viewed by 1232
Abstract
Bacterial nanocellulose has been commonly used as a gelling or stabilizing agent in the food industry and as an excipient in pharmacology. However, due to its physical and chemical properties, such as its high degradation temperature and the ease with which it can [...] Read more.
Bacterial nanocellulose has been commonly used as a gelling or stabilizing agent in the food industry and as an excipient in pharmacology. However, due to its physical and chemical properties, such as its high degradation temperature and the ease with which it can interact with other molecules, bacterial nanocellulose has been established as a material with great potential for the protection of bioactive compounds. This research shows the capacity of bacterial nanocellulose to establish interactions with B vitamins (B1, B2, B3 and B12) through different sorption isotherms, mainly by means of the BET, GAB and TSS models. First, the degradation of the vitamin B complex, which mostly occurs upon heating, is minimized in the presence of BNC, herein proposed as a thermal stabilizer. Secondly, BNC is shown to bind to micronutrients and act as dietary fiber. BNC acts as a thickening and water-binding agent. The effects of BNC are determined to occur as an encapsulation system that facilitates affinity adsorption in mono- and multilayers. Finally, bacterial nanocellulose was used as an encapsulating agent for the vitamin B complex by spray drying. It is demonstrated that BNC is a very successful new nanomaterial for encapsulation, with a high level of adsorption, and for the protection of hydro-soluble vitamins. BNC has shown great potential to adsorb vitamins B1, B2, B3 and B12 owing to their hydroxyl groups, which are responsible for its water or vitamin sorption. Due to the features of bacterial nanocellulose, it is possible to use it as a raw material in the food industry to protect micronutrients during the thermal process. Full article
(This article belongs to the Special Issue Advances in Polymer-Based Nanomaterials with Antibacterial Properties)
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13 pages, 2180 KiB  
Article
Antimicrobial Effect of Waterborne Polyurethane-Based Cellulose Nanofibril/Silver Nanoparticles Composites and Acacia concinna (Willd.) DC Extract (Shikakai)
by Lu Lu Taung Mai, H’ng Paik San, Min Min Aung, Hiroshi Uyama, Ainun Zuriyati Mohamed, Ezyana Kamal Bahrin, Mas Jaffri Masarudin, Azra Afrina binti Mohamad Zulkifli and Tung Woey Chew
Polymers 2024, 16(19), 2683; https://doi.org/10.3390/polym16192683 - 24 Sep 2024
Cited by 1 | Viewed by 1371
Abstract
Antimicrobial coatings are becoming increasingly popular in functional material modification and are essential in addressing microbial infection challenges. In this study, the phytochemical and antimicrobial potential of aqueous, 80% methanol and 80% ethanol pod extracts of Acacia concinna (Willd.) DC (AC) and its [...] Read more.
Antimicrobial coatings are becoming increasingly popular in functional material modification and are essential in addressing microbial infection challenges. In this study, the phytochemical and antimicrobial potential of aqueous, 80% methanol and 80% ethanol pod extracts of Acacia concinna (Willd.) DC (AC) and its application in the green in situ (one pot) synthesis of silver nanoparticles on Cellulose nano fibrils (CNF) and Waterborne polyurethane (WPU) were prepared. The phytochemical evaluation of Acacia concinna crude extracts showed the presence of alkaloids, flavonoids, phenols, tannins, terpenoids, saponins, steroids. The surface plasmon Resonance peak of CNF/AC-AgNPs was 450 nm and the FTIR result confirmed functional groups such as carbonyl, phenols and carboxyl were present which was important for the bio-reduction of silver nanoparticles. The crude AC aqueous pods extract against Gram-positive and Gram-negative bacteria compared with AC ethanol and AC methanol extracts. The WPU/CNF/AC-AgNPs composite dispersion was also good in terms of its antibacterial activities. The WPU/CNF/AC-AgNPs nanocomposites could be applied as bifunctional nanofillers as an antimicrobial agent in food packaging systems and other biological applications. Full article
(This article belongs to the Special Issue Advances in Polymer-Based Nanomaterials with Antibacterial Properties)
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16 pages, 4030 KiB  
Article
Capability of Copper Hydroxy Nitrate (Cu2(OH)3NO3) as an Additive to Develop Antibacterial Polymer Contact Surfaces: Potential for Food Packaging Applications
by Xiomara Santos, Juana Rodríguez, Francisco Guillén, Javier Pozuelo, J. M. Molina-Guijarro, Diogo Videira-Quintela and Olga Martín
Polymers 2023, 15(7), 1661; https://doi.org/10.3390/polym15071661 - 27 Mar 2023
Cited by 5 | Viewed by 3342
Abstract
The globalization of the market, as well as the increasing world population, which require a higher demand for food products, pose a great challenge to ensure food safety and prevent food loss and waste. In this sense, active materials with antibacterial properties are [...] Read more.
The globalization of the market, as well as the increasing world population, which require a higher demand for food products, pose a great challenge to ensure food safety and prevent food loss and waste. In this sense, active materials with antibacterial properties are an important alternative in the prolongation of shelf life and ensuring food safety. In this work, the ability of copper(II) hydroxy nitrate (CuHS) to obtain antibacterial films based on low density polyethylene (LDPE) and polylactic acid (PLA), was evaluated. The thermal properties of the composites, evaluated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), showed that the concentrations of added CuHS do not particularly change these characteristics with respect to the neat polymer matrix films. The mechanical properties, determined using dynamic mechanical analysis (DMTA), indicate a small increase in the brittleness of the material in PLA-based composites. The antibacterial properties against Listeria monocytogenes and Salmonella enterica were evaluated using a surface contact test, and a bacterial reduction of at least 8 to 9 logarithmic units for the composites with 0.3% CuHS, both in LDPE and PLA and against both bacteria, were achieved. The reusability of the composite films after their first use demonstrated a higher stability against Listeria monocytogenes. The migration and cytotoxicity of the composites loaded with 0.3% CuHS was evaluated, demonstrating the safety of these materials, which reinforces their potential use in food packaging applications. Full article
(This article belongs to the Special Issue Advances in Polymer-Based Nanomaterials with Antibacterial Properties)
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12 pages, 11012 KiB  
Article
Silver Nanoparticles as Antifungal Agents in Acrylic Latexes: Influence of the Initiator Type on Nanoparticle Incorporation and Aureobasidium pullulans Resistance
by Gabrielle Boivin, Anna M. Ritcey and Véronic Landry
Polymers 2023, 15(6), 1586; https://doi.org/10.3390/polym15061586 - 22 Mar 2023
Cited by 4 | Viewed by 2284
Abstract
Discoloration of wood coatings due to fungal growth negatively affects the aesthetic properties of the coatings, and new ways to control fungal growth on coatings are needed. For this reason, silver nanoparticles (AgNPs) have been incorporated in acrylic latexes as antifungal agents. Using [...] Read more.
Discoloration of wood coatings due to fungal growth negatively affects the aesthetic properties of the coatings, and new ways to control fungal growth on coatings are needed. For this reason, silver nanoparticles (AgNPs) have been incorporated in acrylic latexes as antifungal agents. Using miniemulsion polymerization, latexes were prepared with two types of initiators (hydrophilic and hydrophobic) to assess the influence of the initiator type on AgNPs dispersion, both within the latex particles and the dry film. In addition, the impact of NP dispersion on resistance to black-stain fungi (Aureobasidium pullulans) was also evaluated. Inductively coupled plasma optical emission spectroscopy (ICP-OES) analysis indicates that acrylic latexes prepared with azobisisobutyronitrile (AIBN) as the initiator contain more AgNPs than those prepared with potassium persulfate (KPS). Cryo-TEM and SEM analyses show that the distribution of the AgNPs within the polymer particles is influenced by the nature of the initiator. When AIBN, a hydrophobic initiator, is used, the AgNPs appear to be closer to the surface of the polymer particles and more evenly distributed. However, the antifungal efficiency of the AgNPs-embedded latexes against A. pullulans is found to be higher when KPS is used, despite this initiator leading to a smaller amount of incorporated AgNPs and a less uniform dispersion of the nanoparticles. Full article
(This article belongs to the Special Issue Advances in Polymer-Based Nanomaterials with Antibacterial Properties)
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