Self-sterilizing ormosils surfaces based on photo-synzthesized silver nanoparticles

Gonçalves, Lidiane Patricia; Miñán, Alejandro; Benítez, G.; Mele, Mónica Alicia Fernández Lorenzo de; Vela, M. E.; Schilardi, Patricia Laura; Ferreira-Neto, Elias Paiva; Noveletto, Julia Cristina; Correr, Wagner Rafael; Rodrigues-Filho, Ubirajara P.

doi:10.1016/j.colsurfb.2017.12.016

Cited by 15 publications

(15 citation statements)

References 62 publications

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“…As the reduced POM (POM Red ) and the oxidized POM (POM Ox ) are of different colors, the wearer would therefore have a simple indicator or warning of the presence of the CWA [20][21][22]. Ormosils have been shown to be excellent hosts for trapping nanoparticles of metals [35,36] [39]. Organicallymodified silicates (Ormosils) are organic-inorganic materials formed by the hydrolysis and condensation of organically-modified silanes with traditional alkoxide precursors.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyoxometalate-doped aminosilane-modified silicate hybrid as a new barrier of chem-bio toxicant

Chang

Wang

2019

Journal of Inorganic Biochemistry

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A B S T R A C T Nanohybrid membranes based on the Keggin-type polyoxometalate (POM) H 5 PV 2 Mo 10 O 40 and aminosilanemodified silicate (Ormosil and Ormosil(NR 4 + Cl − )) hybrids were synthesized as a new barrier to protect against simulants of chemical and biological toxicant. The 31 P NMR and XPS results indicated that POM was bound to the Ormosil and Ormosil(NR 4 + Cl − ) hybrids after impregnation. The antibacterial effects of the hybrids and hybrid-impregnated fabrics against Gram-negative and Gram-positive bacteria were investigated with zone of inhibition, minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC) and platecounting method. The MIC/MBC values of Ormosil(NR 4 + Cl − )/POM and Ormosil/POM against bacteria were 0.267/2.67 and 2.67/26.7, respectively, and the percentage reduction of bacteria was approximately 100% after 20 laundry cycles of their fabrics. The reaction products and mechanisms of the adsorptive degradation of 2chloroethylethylsulfide (CEES) by hybrids were investigated with 13 C NMR. The results of this study showed that POM-doped Ormosil systems are capable of destroying bacteria and CEES. + Cl − )/POM hybrids, have proved advantageous as a new type of insoluble antimicrobial polymer, because they have a greater antimicrobial activity and better durability in water than other conventional antimicrobial polymers. They have proved kill a broad range https://doi.

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Section: Introductionmentioning

confidence: 99%

Preparation of polyoxometalate-doped aminosilane-modified silicate hybrid as a new barrier of chem-bio toxicant

Chang

Wang

2019

Journal of Inorganic Biochemistry

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“…In coatings with dense polymer structure, or with hydrophobic properties, limited contact with aqueous medium reduced overall Ag release and its speed, resulting in more durable Ag release.Biomedical implants represent an important application of such coatings, where burst release and almost complete depletion of antimicrobial material is preferable.Coatings that impeded Ag release, either by covalent attachment, electrostatic interactions, control of silver species’ oxidation state, or by imposing a physical barrier, such as additional polymer layers of controlled porosity.In this group, 43 papers (38%) were found that employed different strategies to limit Ag release from AMC in the interest of prolonging the antibacterial effect. Several papers described coatings where Ag was encapsulated in complex structures, such as core-shells (Ho et al, 2013; Gonçalves et al, 2018), carbon nanotubes (Hao et al, 2017), etc. Another approach was to provide electrostatic interactions such as coordinating Ag ions and NPs with thiol groups (Gehring et al, 2015), while other researchers introduced functional molecules (e.g., aminosilane linker) to enable covalent binding of Ag NPs (Gomez-Carretero, Nybom & Richter-Dahlfors, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…In this group, 43 papers (38%) were found that employed different strategies to limit Ag release from AMC in the interest of prolonging the antibacterial effect. Several papers described coatings where Ag was encapsulated in complex structures, such as core-shells (Ho et al, 2013; Gonçalves et al, 2018), carbon nanotubes (Hao et al, 2017), etc. Another approach was to provide electrostatic interactions such as coordinating Ag ions and NPs with thiol groups (Gehring et al, 2015), while other researchers introduced functional molecules (e.g., aminosilane linker) to enable covalent binding of Ag NPs (Gomez-Carretero, Nybom & Richter-Dahlfors, 2017).…”

Section: Introductionmentioning

confidence: 99%

Potential ecotoxicological effects of antimicrobial surface coatings: a literature survey backed up by analysis of market reports

Rosenberg

Ilić

Juganson

et al. 2019

PeerJ

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This review was initiated by the COST action CA15114 AMICI “Anti-Microbial Coating Innovations to prevent infectious diseases,” where one important aspect is to analyze ecotoxicological impacts of antimicrobial coatings (AMCs) to ensure their sustainable use. Scopus database was used to collect scientific literature on the types and uses of AMCs, while market reports were used to collect data on production volumes. Special attention was paid on data obtained for the release of the most prevalent ingredients of AMCs into the aqueous phase that was used as the proxy for their possible ecotoxicological effects. Based on the critical analysis of 2,720 papers, it can be concluded that silver-based AMCs are by far the most studied and used coatings followed by those based on titanium, copper, zinc, chitosan and quaternary ammonium compounds. The literature analysis pointed to biomedicine, followed by marine industry, construction industry (paints), food industry and textiles as the main fields of application of AMCs. The published data on ecotoxicological effects of AMCs was scarce, and also only a small number of the papers provided information on release of antimicrobial ingredients from AMCs. The available release data allowed to conclude that silver, copper and zinc are often released in substantial amounts (up to 100%) from the coatings to the aqueous environment. Chitosan and titanium were mostly not used as active released ingredients in AMCs, but rather as carriers for other release-based antimicrobial ingredients (e.g., conventional antibiotics). While minimizing the prevalence of healthcare-associated infections appeared to be the most prosperous field of AMCs application, the release of environmentally hazardous ingredients of AMCs into hospital wastewaters and thus, also the environmental risks associated with AMCs, comprise currently only a fraction of the release and risks of traditional disinfectants. However, being proactive, while the use of antimicrobial/antifouling coatings could currently pose ecotoxicological effects mainly in marine applications, the broad use of AMCs in other applications like medicine, food packaging and textiles should be postponed until reaching evidences on the (i) profound efficiency of these materials in controlling the spread of pathogenic microbes and (ii) safety of AMCs for the human and ecosystems.

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“…The main disadvantage is requirement of special arrangement for doing this photo assisted synthesis. Goncalves et al [37] had synthesized AgNPs as coating along with other materials by photo assisted approach. This coated material shows an excellent antibacterial activity due to AgNPs.…”

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confidence: 99%

An Assortment of Synthesis Methods of Silver Nanoparticles: A Review

Jayaprakash¹,

Suresh²,

Raja³

et al. 2019

Asian J. Chem.

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In last few decades, synthesis of metal nanoparticles such as silver, gold, copper, platinum and iron has been spotlighted with much interest among the material scientists due to their peculiar properties such as tunable optical property, electrical property, good chemical reactivity, thermal stability, large surface areas to volume ratio, magnetic property, high catalytic activity and easy handling [1,2]. They have been used in diverse fields such as cosmetics, medical diagnosis, therapy, energy, electronic devices, catalysis, sensors and waste treatment process [3-6]. Among the metal nanoparticles, silver nanoparticles (AgNPs) have much interest due to their exclusive physical, chemical and biological properties compared to bulk material. It has been used in inks [7

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Self-sterilizing ormosils surfaces based on photo-synzthesized silver nanoparticles

Cited by 15 publications

References 62 publications

Preparation of polyoxometalate-doped aminosilane-modified silicate hybrid as a new barrier of chem-bio toxicant

Preparation of polyoxometalate-doped aminosilane-modified silicate hybrid as a new barrier of chem-bio toxicant

Potential ecotoxicological effects of antimicrobial surface coatings: a literature survey backed up by analysis of market reports

An Assortment of Synthesis Methods of Silver Nanoparticles: A Review

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