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Anticorrosive epoxy/clay nanocomposite coatings : rheological and protective properties / Milos D. Tomic in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 3 (05/2016)
[article]
Titre : Anticorrosive epoxy/clay nanocomposite coatings : rheological and protective properties Type de document : texte imprimé Auteurs : Milos D. Tomic, Auteur ; Branko Dunjic, Auteur ; Jelena B. Bajat, Auteur ; Violeta Likic, Auteur ; Jelena Rogan, Auteur ; Jasna Djonlagic, Auteur Année de publication : 2016 Article en page(s) : p. 439-456 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Argile
Cloisite
Dispersions et suspensions
Epoxydes
Nanoparticules
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : The preparation of epoxy/clay nanocomposites (NCs) and their insertion into coatings are of great importance since the NCs could enhance the protective performances. In this study, epoxy NCs with 1–10 wt% of nanoclay Cloisite 30B (C30B) were prepared by the sonication-assisted solution method. The rheological measurements of epoxy/C30B suspensions revealed non-Newtonian, shear-thinning behavior of the uncured NCs, with an increase in the viscosity, yield stress, and shear modules with increasing organoclay content, while the dispersion effectiveness of C30B decreased. A significant enhancement of the rheological parameters was observed at the second percolation threshold (4.1 vol%) due to the formation of a continuous network of 45-layer-thick tactoids. Although NCs with 1–3 wt% C30B exhibited slightly reduced mechanical and adhesion properties compared with the cured reference epoxy resin, the epoxy primer and topcoat based on NC with 1 wt% C30B generally displayed improved impact resistance and maintained flexibility, pendulum hardness, and good adhesion properties. Two-layer coating systems, i.e., NC-based primers and topcoats, had higher corrosion stability in a salt spray chamber compared to the unmodified system. Note de contenu : - EXPERIMENTAL : Materials - Epoxy NCs preparation - Application of epoxy Ncs on steel substrates - Epoxy coatings preparation - Application of epoxy coatings on steel substrates - Sample characterization
- RESULTS AND DISCUSSION : Free swelling and rheological properties of the C30B/thinner dispersion - Rheological properties of the uncured epoxy Ncs - Structural characterization of cured epoxy Ncs - Adhesive and mechanical properties of epoxy NCs - Adhesive and mechanical properties of NC-based primer and topcoat - Anticorrosive properties of epoxy coatingsDOI : 10.1007/s11998-015-9762-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9762-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26285
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Code-barres Cote Support Localisation Section Disponibilité 18071 - Périodique Bibliothèque principale Documentaires Disponible Anticorrosive properties of a superhydrophobic coating based on an ORMOSIL enhanced with MCM-41-HDTMS nanoparticles for metals protection / Erik Uc-Fernández in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
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Titre : Anticorrosive properties of a superhydrophobic coating based on an ORMOSIL enhanced with MCM-41-HDTMS nanoparticles for metals protection Type de document : texte imprimé Auteurs : Erik Uc-Fernández, Auteur ; Jorge González-Sánchez, Auteur ; Alejandro Ávila-Ortega, Auteur ; Yamile Pérez-Padilla, Auteur ; J. Manuel Cervantes-Uc, Auteur ; Javier Reyes-Trujeque, Auteur ; William A. Talavera-Pech, Auteur Année de publication : 2023 Article en page(s) : p. 347-357 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone
Analyse quantitative (chimie)
Angle de contact
Anticorrosifs
Anticorrosion
Caractérisation
Energie de surface
Hexadécyltriméthoxysilane
Hydrophobie
Matériaux mésoporeux
Métaux -- Revêtements protecteurs
Microscopie
Nanoparticules
Revêtements organiques
Revêtements protecteurs
Spectroscopie d'impédance électrochimique
Surfaces fonctionnellesIndex. décimale : 667.9 Revêtements et enduits Résumé : The anticorrosive properties of hexadecyltrimethoxysilane (HDTMS) functionalized MCM-41 silica particles (MCM-41-HDTMS) incorporated into a methyltriethoxysilane (MTES) sol-gel matrix coatings were studied. The MCM-41 particles were synthesized and functionalized with HDTMS, and added to a sol composed of MTES:methanol:NH4OH 7M to create a coating. The materials synthesized with and without MCM-41-HDTMS were deposited, by dip coating, on Cu and Fe sheets, and were physically characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), contact angle, surface energy using the Owens, Wendt, Rabel, and Kaelble (OWRK) method, and by electrochemical impedance spectroscopy (EIS). The addition of the MCM-41-HDTMS to the MTES matrix induced an increase of the contact angle by about 10 degrees with an augment in its dispersive component, caused by a lofty deposition of long carbon chains from HDTMS over the high surface area of the MCM-41 particles, changing from hydrophobic to superhydrophobic materials with a contact angle of 155° for the Cu-MTES-HDTMS sample. EIS results show that the addition of MCM-41-HDTMS increases the charge transfer resistance providing better protection to metals. The results show that with the addition of MCM-41-HDTMS to an MTES matrix it is possible to synthesize superhydrophobic coatings capable of limiting the corrosion degradation process. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of MCM-41-HDTMS particles - Synthesis of coatings - Application of the coating - Characterization
- DISCUSSION AND RESULTS : Scanning electron microscopy and elemental chemical analysis (SEM-EDS) - Atomic force microscopy (AFM) - Contact angle and surface energy - Electrochemical impedance spectroscopy
- Table 1 : Atomic percentages of the main elements present in coatings obtained by EDS analysis
- Table 2 : Surface energy of all substrates calculated by OWRK method
- Table 3 : Quantitative impedance analysis for Cu, Cu-MTES, and Cu-MTES-HDTMS systems
- Table 4 : Quantitative impedance analysis for Fe, Fe-MTES, and Fe-MTES-HDTMS systemsDOI : https://doi.org/10.1007/s11998-022-00675-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00675-1.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38847
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Code-barres Cote Support Localisation Section Disponibilité 23928 - Périodique Bibliothèque principale Documentaires Disponible Antimicrobial coatings / Michael Wagener in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4503 (08/2006)
[article]
Titre : Antimicrobial coatings Type de document : texte imprimé Auteurs : Michael Wagener, Auteur Année de publication : 2006 Article en page(s) : p. 34-37 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens
Etude in vitro
Nanoparticules
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Polyuréthanes
Tests d'efficacitéIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanocomposite coatings can reduce infection within a medical environment.
Coatings which are able to reduce the risk of biofilm formation on material surfaces are relevant for medical devices in order to reduce infections but also important for other technical and consumer applications. Either by binding biocides in the surface or by incorporating such substances into the coating, the proliferation of bacteria and fungi in the material can be reduce significantly.
Silver is especially suited as an antimicrobial substance due to its high antimicrobial efficacy accompanied with a low or non-existent cytotoxicity.
In the first part of this paper the use of nanoparticulate metallic silver particles as an antimicrobial agent in polyurethane coatings is presented. In the second part a new coating system, which combines highly efficient nanoparticulate silver particles with the versatile plasmapolymer coating technology is discussed. In-vitro tests show an excellent antimicrobial effect of the silver particles against a variety of clinical relevant bacteria (including multiresistant strains of MRSA and MRSE).
Additionally the surface energy of the plama polymer can be varied in order to change the adhesion properties of bacteria.Note de contenu : - Antimicrobial polyurethane coating with highly porous metallic silver particles
- Plasma polymer coatings with silver nano particles on medical devices
- Testing of antimicrobial efficacy (in-vitro) - the Bio-Gate assayPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27491
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Code-barres Cote Support Localisation Section Disponibilité 005346 - Périodique Bibliothèque principale Documentaires Disponible Antimicrobial coatings - the case for copper / Thierry Destruhaut in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4670 (08/2021)
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Titre : Antimicrobial coatings - the case for copper Type de document : texte imprimé Auteurs : Thierry Destruhaut, Auteur Année de publication : 2021 Article en page(s) : p. 28-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens
Cuivre
Nanoparticules
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : the author discusses the advantages of antimicrobial coatings that use copper as the active ingredient. En ligne : https://drive.google.com/file/d/1LMfNM2DCBdkNb32vyT7W5b9NGeRMtvGd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36198
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Code-barres Cote Support Localisation Section Disponibilité 22872 - Périodique Bibliothèque principale Documentaires Disponible Antistatic and antibacterial two-component waterborne polyurethane coating / Xianwen Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
[article]
Titre : Antistatic and antibacterial two-component waterborne polyurethane coating Type de document : texte imprimé Auteurs : Xianwen Li, Auteur ; Xinmeng Xu, Auteur ; Faai Zhang, Auteur Année de publication : 2023 Article en page(s) : p. 869-881 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Antistatiques
Caractérisation
Cuivre
Nanoparticules
Polyaniline
Polyuréthanes
Revêtements bi-composant
Revêtements en phase aqueuse
Revêtements organiques
ZirconeLe dioxyde de zirconium ou oxyde de zirconium(IV) couramment appelée zircone est un composé inorganique du zirconium de formule ZrO2. Ce matériau est une céramique technique d'aspect opaque. Appelé CZ (Cubic Zirconia) lorsque transparent, il est utilisé pour imiter le diamant. Il ne faut pas le confondre avec le zircon (ZrSiO4). Sous sa forme tétragonale, l'oxyde de zirconium est un matériau a vocation mécanique, cette évolution cristallographique lui confère une dureté très élevée (1200Hv) ainsi qu'une bonne résistance aux sollicitations mécaniques (700Mpa en traction et 2000Mpa en compression). Une fois polie, la zircone tétragonale peut atteindre un Ra de 0,02, ce qui permet de l'utiliser pour des pièces de frottement.Index. décimale : 667.9 Revêtements et enduits Résumé : Hydroxyl acrylate emulsion was prepared firstly by the semicontinuous seeded emulsion polymerization, and then adding polyaniline (PANI)/Cu/ZrO2 ternary nanocomposites, two-component waterborne polyurethane (2 K WPU) composite coatings with antistatic and antibacterial properties were obtained by mixing the emulsion with hydrophilic modified polyisocyanate. The structure and morphology of the PANI/Cu/ZrO2 were observed by Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffractometer. The thermal, antistatic, antibacterial, anticorrosion, and mechanical properties of the 2 K WPU composite coatings were determined. The results showed that the addition of the ternary nanocomposites increased the antistatic, antibacterial, anticorrosion, and mechanical properties of the 2 K WPU coating. The initial decomposition temperature increased from 200 to 225°C, and the tensile strength increased by 44.4%. The coatings still maintained good impact strength of 50/50 kg cm, adhesion of grade 2, flexibility of 1 mm, pendulum hardness of 293 s, and the gloss (60°) of 119.4. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of PANI/Cu and PANI/Cu/ZrO 2 nanocomposites - Preparation of hydroxyl acrylate emulsion - Preparation of 2 K WPU film - Preparation of antibacterial and antistatic - 2 K WPU coatings - Preparation of culture medium - Characterization - Determination of surface electric resistance - Qualitative antibacterial test - Quantitatively antibacterial test - Coating anticorrosion resistance testing - Tinplate surface analysis - Adhesion, pendulum hardness, impact resistance, and gloss of films testing - Mechanical properties test
- RESULTS AND DISCUSSION : FTIR - SEM images - XRD - Thermogravimetric analysis (TGA) - Antistatic property - Antibacterial property - Anticorrosion performance of the composite coatings - Coating performance of 2 K WPU composite
- Table 1 : Effect of PANI/Cu/ZrO2 content on film performance of 2 K WPUDOI : https://doi.org/10.1007/s11998-022-00708-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00708-9.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39434
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