Special Issue "Antimicrobial/Antibiofilm Surfaces"

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: 31 December 2020.

Special Issue Editor

Prof. Dr. Mariana Carmen Chifiriuc
E-Mail Website
Guest Editor
Faculty of Biology, Microbiology Department and the Research Institute of the University of Bucharest, ICUB, Romania
Interests: antibiotic resistance—mechanisms; epidemiology; reservoirs; antimicrobial strategies; microbial virulence and pathogenicity
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Microorganisms are ubiquitous in nature, forming complex social communities called biofilms in every conceivable ecological niche. Biofilms can coat any inert or cellular surface, with significant deleterious effects, such as biofouling in industrial and drinking water systems, biocorrosion and biodeterioration adversely affecting production and cultural heritage, and medical device-associated infections. Medical biofilms are protected from the action of antimicrobial agents by different mechanisms, often acting additively or even synergistically, including the protective role of the extracellular matrix; the complex architecture and spatial organization, leading to differentiation of biofilm cells layers, with different physiology and resistant phenotypes; adaptation to starvation conditions by entering in metabolic latency; and selection of persisters’ population. Moreover, in a biofilm state, due to the high density and proximity of microbial cells, the horizontal gene transfer (HGT) can easily occur, facilitating the resistance genes’ spread. The presence of sub-inhibitory concentrations of antimicrobials could increase mutation, recombination, and HGT rates. In multispecies biofilms, the antibiotic-resistant commensal microorganisms could protect antibiotic-susceptible pathogens from eradication. Detachment of microorganisms from biofilms may lead to the dissemination of infection in the human host. Thus, once formed, microbial biofilms are difficult or even impossible to eradicate, justifying the efforts made to develop materials or coatings with bacterial adherence and surface colonization-repellent properties. The purpose of this Special Issue is to address the current progress and challenges for developing reliable antimicrobial and antibiofilm coatings for biomedical, industrial, and ecological applications.

Prof. Dr. Mariana Carmen Chifiriuc
Guest Editor

Manuscript Submission Information

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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. Coatings 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 1600 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

  • Synthesis and characterization methodologies for antimicrobial/antibiofilm coatings
  • Antifouling coatings
  • Antibiofilm coatings for medical devices
  • Antibiofilm coatings for the preservation/restauration/conservation of historical heritage buildings and objects
  • In vitro and in vivo biofilm models for assessing coatings’ antimicrobial/antibiofilm efficiency
  • Biocompatibility and safety assessment

Published Papers (2 papers)

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Research

Open AccessArticle
Effect of Emulsifier on the Structure and Properties of Waterborne Silicone Antifouling Coating
Coatings 2020, 10(2), 168; https://doi.org/10.3390/coatings10020168 - 12 Feb 2020
Abstract
Three-component waterborne silicone antifouling coatings, which could cured at room temperature, were prepared, respectively, with cationic (stearyl trimethyl ammonium bromide) or anionic (sodium dodecyl benzene sulfonate) silicone emulsion as a film-forming substance, γ-methacryloxypropyltrimethoxysilane as a curing agent and dibutyltin dilaurate as a catalyst. [...] Read more.
Three-component waterborne silicone antifouling coatings, which could cured at room temperature, were prepared, respectively, with cationic (stearyl trimethyl ammonium bromide) or anionic (sodium dodecyl benzene sulfonate) silicone emulsion as a film-forming substance, γ-methacryloxypropyltrimethoxysilane as a curing agent and dibutyltin dilaurate as a catalyst. The effect of emulsifier on the structure and properties of silicone coating was studied. The results showed that the coating with cationic silicone emulsion had high crosslinking density, and its surface is smooth. The surface of the coating prepared by the anionic silicone emulsion is rough. Emulsifier type had no obvious effect on the surface free energy of the waterborne silicone coating. The coatings have the characteristics of low surface energy and excellent bacterial desorption properties. Stearyl trimethyl ammonium bromide in the cured coating can reduce the adhesion of marine bacteria on the coating surface. Both the emulsifiers can inhibit the activity of Navicula Tenera. The waterborne silicone coating prepared by cationic silicone emulsion has better comprehensive mechanical properties and antifouling performance. Full article
(This article belongs to the Special Issue Antimicrobial/Antibiofilm Surfaces)
Open AccessArticle
Synthesis of Antimicrobial Films Based on Low-Density Polyethylene (LDPE) and Zeolite A Containing Silver
Coatings 2019, 9(12), 786; https://doi.org/10.3390/coatings9120786 - 23 Nov 2019
Abstract
The present study aimed at the preparation of antimicrobial films based on low-density polyethylene (LDPE), with zeolite exchanged with Silver (Ag) in 1, 5 and 10 wt.%. Zeolites with Ag were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray Fluorescence [...] Read more.
The present study aimed at the preparation of antimicrobial films based on low-density polyethylene (LDPE), with zeolite exchanged with Silver (Ag) in 1, 5 and 10 wt.%. Zeolites with Ag were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray Fluorescence (XRF). LDPE films with added silver-substituted zeolite A were synthesized by wet-casting, with the zeolite content in the films ranging from 1–5 wt.%. The antibacterial activity of the silver-substituted zeolite was assessed according to its minimum inhibitory concentration (MIC), using Escherischia coli as the target bacteria. LDPE films with silver-loaded zeolite were also tested against E. coli and Staphylococcus aureus. Silver insertion in the zeolite did not change its structure. The MIC of the zeolite with 1% silver and a concentration of 0.05 mg zeolite/mL was not able to inhibit the visible growth of the bacteria; however, an increased silver concentration resulted in total inhibition after 24 h of incubation. Zeolites with 5% and 10% of silver showed a MIC of 0.05 mg zeolite/mL. The films with best antibacterial activity against E. coli and S. aureus were those prepared with 5 wt.% zeolites loaded with 5% and 10% of silver. LDPE films with silver-loaded zeolite A are potential resources in the development of active packaging for food preservation and safety. Full article
(This article belongs to the Special Issue Antimicrobial/Antibiofilm Surfaces)
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