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A smart anticorrosion coating based on hollow silica nanocapsules with inorganic salt in shells / Dong Zhao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
[article]
Titre : A smart anticorrosion coating based on hollow silica nanocapsules with inorganic salt in shells Type de document : texte imprimé Auteurs : Dong Zhao, Auteur ; Dongguang Liu, Auteur ; Zhijia Hu, Auteur Année de publication : 2017 Article en page(s) : p. 85-94 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Anticorrosifs
Anticorrosion
Benzotriazole
Matériaux intelligents
Nanocapsules
Revêtements protecteurs
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : This work presents the synthesis of corrosion inhibitor [1H-benzotriazole (BTA)]-loaded hollow silica nanocapsules with magnesium hydroxide precipitate in the shells (HSNs-M/BTA) through inverse microemulsion (W/O) polymerization. TEM and Brunauer–Emmett–Teller (BET) measurements indicate that the silica nanocapsules possess voids in the inner part and mesoporous on the surface. The actual loading capacity of BTA is 287.17 mg (BTA)/1 g (HSNs-M/BTA). The results of UV absorption spectra show that the release of BTA can be triggered by the changing of pH in the corrosion solution. The anticorrosive SiOx/ZrOx coatings embedded with hydrophobically modified HSNs-M have a better waterproof performance since the water contact angle can reach 140°. In comparison to the passive SiOx/ZrOx coatings with or without BTA, the enhanced corrosion protection performance of this developed anticorrosive system was observed by both electrochemical impedance spectroscopy and Tafel analysis. The fabrication of nanocapsules with corrosion inhibitors is promising as an intelligent element in protective coatings in the future. Note de contenu : - EXPERIMENTAL : Materials - Preparation and hydrophobic modification of HSNs-M with BTA - The release kinetics of BTA from the hollow silica nanocapsules - Synthesis and deposition of sol-gel coatings for aluminum substrate - Characterization
- RESULTS AND DISCUSSION : Preparation of hollow silica nanocapsules loaded with BTA - Anticorrosive properties of sol-gel film embedded with hollow silica particles containing BTADOI : 10.1007/s11998-016-9830-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9830-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27791
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 85-94[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18674 - Périodique Bibliothèque principale Documentaires Disponible Sol–gel based protective coatings for copper products / Juha Nikkola in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 3 (09/2008)
[article]
Titre : Sol–gel based protective coatings for copper products Type de document : texte imprimé Auteurs : Juha Nikkola, Auteur ; Juha Mannila, Auteur ; Riitta Mahlberg, Auteur ; Jarmo Siivinen, Auteur ; Mika Kolari, Auteur ; Amar Mahiout, Auteur Année de publication : 2008 Article en page(s) : p. 335-344 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuivre
Métaux -- Revêtements protecteurs
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : Corrosion, fouling, and wearing of metal surfaces are the most common problems faced in industry as well as in environmental use. In the recent study, sol–gel based protective coatings were developed and deposited on different copper substrates. Different chemical pretreatments were used to enhance the adhesion and spreadability of coatings on copper surfaces. Substantial improvement of the corrosion resistance of sol–gel coated copper surfaces was obtained by a salt spray test. In addition, the sol–gel coatings increased hydrophobic and easy-to-clean properties of the copper surface. Variation of the curing temperature of the coatings caused changes in the morphology, adhesion, and topography of the sol–gel coatings. On the basis of the important information obtained in this study, the protective properties of sol–gel coatings can be tailored for copper and copper alloy substrates. DOI : 10.1007/s11998-007-9069-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9069-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2977
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 3 (09/2008) . - p. 335-344[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010633 - Périodique Bibliothèque principale Documentaires Disponible Sol gel coatings / Rohit Raj in PAINTINDIA, Vol. LVI, N° 1 (01/2006)
[article]
Titre : Sol gel coatings Type de document : texte imprimé Auteurs : Rohit Raj, Auteur Année de publication : 2006 Article en page(s) : p. 63-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couches minces
Revêtements
Sol-gel, Procédé
SolénoïdeIndex. décimale : 667.9 Revêtements et enduits Résumé : A new class of materials is fast emerging world wide with a promise to bring novel properties to reality. These materials are not necessarily new in their make up but they are modified to provide new material property and device characteristics in unprecedented ways. More recent advances have led to "hierarchical" structure of materials where each strata imparts a certain specific function. This is the class of "Sol Gel Coatings" Coatings for rearview mirrors and anti-reflective and architectural applications have been in commercial production since the 1960's. But today, sol gel thin film coatings are extensively used for such diverse applications as protective and optical coatings, passivation and planarization layers, sensors, high or low dielectric constant films, inorganic membranes, electro-optic and non linear optical film, electrochromics, semiconducting antistatic coatings, super conducting films, strengthening layers and ferroelectrics. Note de contenu : - Types of Sol gels
- Coating process and coating equipments
- Typical examples of uses of Sol gel coatings
- Photonic solutions and sol gel
- Elastomeric reinforcement strategies
- Topochemistry of wood–inorganic compositesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11540
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Code-barres Cote Support Localisation Section Disponibilité 004700 - Périodique Bibliothèque principale Documentaires Disponible Sol–gel hybrid films based on organosilanes with long alkyl chains in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
[article]
Titre : Sol–gel hybrid films based on organosilanes with long alkyl chains Type de document : texte imprimé Année de publication : 2020 Article en page(s) : p. 1389–1399 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Caractérisation
Hydrophobie
Organosilanes
Revêtement antireflet
Revêtements organiques
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : In this paper, we report the synthesis of different silica materials via the acid-catalyzed sol–gel process at room temperature (25°C), using silane precursors with various alkyl chains (dimethyl, octyl and/or hexadecyl), in order to obtain thin films with anti-reflective and hydrophobic properties. Chemical, optical and structural properties of obtained silica materials were thoroughly characterized with various techniques such as FTIR and UV–Vis spectroscopy, AFM analysis, ellipsometric measurements, ESEM and TEM microscopy. Wettability of thin films was evaluated by water contact angle measurements. FTIR spectra of silica materials revealed that the intensity of the Si–O–Si characteristic bands varies depending on the precursor type. From AFM results, we found that the obtained films present a different microstructure as a function of the silica sol formulations. The hydrophobic character of the thin films increases with increasing the length of the hydrophobic chains following the order: dimethyl < octyl < hexadecyl. UV–Vis analysis of the coatings covered with silica materials presents a low reflectance (15.5%). The proposed method in this work has the potential to be a low-cost processing path of nanostructured anti-reflection transparent substrates. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of sol–gel silica materials - Characterization
- RESULTS AND DISCUSSION : FTIR spectroscopy - Atomic force microscopy and diffuse reflectance analysis - Contact angle measurements - ESEM and TEM microscopyDOI : https://doi.org/10.1007/s11998-020-00359-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00359-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34581
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Code-barres Cote Support Localisation Section Disponibilité 22303 - Périodique Bibliothèque principale Documentaires Disponible Sol–gel preparation and characterization of antibacterial and self-cleaning hybrid nanocomposite coatings / Seyed Armin Zare Estekhraji in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)
[article]
Titre : Sol–gel preparation and characterization of antibacterial and self-cleaning hybrid nanocomposite coatings Type de document : texte imprimé Auteurs : Seyed Armin Zare Estekhraji, Auteur ; Sahar Amiri, Auteur Année de publication : 2017 Article en page(s) : p. 1335-1343 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Dioxyde de silicium
Dioxyde de titane
Matériaux hybrides
Oxyde de zinc
Revêtement auto-nettoyant
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : ZnO–TiO2, SiO2–TiO2, and SiO2–TiO2–ZnO hybrid nanocomposite coatings were synthesized based on sol–gel precursors including tetramethoxysilane (TMOS), 3-glycidoxypropyl trimethoxysilane (GPTMS), tetra(n-butyl orthotitanate) (TBT), and zinc acetate dihydrate. The hybrid network was characterized by FTIR, FESEM, and EDAX techniques. Results indicated that inorganic particles’ size was of nanoorder (20–30 nm), with very uniform distribution and dispersion. Photocatalytic and self-cleaning activities of these coatings were further investigated by degradation of methylene blue in an aqueous solution (20 ppm) at visible light irradiation, indicating photocatalytic performance of the coatings containing ZnO and TiO2 nanoparticles. The antibacterial effect of the coatings was investigated for inhibition and inactivation of cell growth, with the results showing the same antibacterial activity for ZnO–TiO2 and SiO2–TiO2–ZnO coatings against Escherichia coli and Staphylococcus aureus; the activity was, however, higher than that of SiO2–TiO2 hybrid nanocomposite coatings. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of SiO2 nanoparticles - Synthesis of TiO2 nanoparticles - Synthesis of ZnO nanoparticles - Preparation of hybrid coatings - Preparation of substrates and coating technique - Characterization - Photocatalytic activity of coatings - Antibacterial efficiency
- RESULTS AND DISCUSSION : FTIR results - Morphological and nanoparticle distribution results - Taber Abrasion analysis results - Self-cleaning and photocatalytic activity of coatings - Antibacterial activities of hybrid coatingsDOI : 10.1007/s11998-017-9932-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9932-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29638
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Code-barres Cote Support Localisation Section Disponibilité 19441 - Périodique Bibliothèque principale Documentaires Disponible Sol-gel route to ceria coatings on AA2024-T3 aluminum alloy / Min Zuo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
PermalinkSol-gel-technology in praxis / Gerhard Jonschker / Hannover [Germany] : Vincentz Network GmbH & Co. (2014)
PermalinkSonochemically sol–gel derived coating of textiles using heterojunction SnO2/ZnO/chitosan bionanocomposites: in vitro antibacterial evaluation / Parisa Kamali in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
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PermalinkSurfair - 10-11 june 2010 - Biarritz / Surfair (10-11 juin 2010; Biarritz) / Surfair (2010)
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