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)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 347-357 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 fonctionnelles Index. 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 systems DOI : 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38847 [article]

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Electrothermal superhydrophobic epoxy nanocomposite coating for anti-icing/deicing / Jiayu Fan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1557-1568 Titre : Electrothermal superhydrophobic epoxy nanocomposite coating for anti-icing/deicing Type de document : texte imprimé Auteurs : Jiayu Fan, Auteur ; Zhu Long, Auteur ; Jin Wu, Auteur ; Peng Gao, Auteur ; Yun Wu, Auteur ; Pengxiang Si, Auteur ; Dan Zhang, Auteur Année de publication : 2023 Article en page(s) : p. 1557-1568 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argent Cuivre Dioxyde de silicium Electrothermie Epoxydes Formulation (Génie chimique) Hexadécyltriméthoxysilane Hydrophobie Matériaux hybrides Nanoparticules Nanotubes de carbone à parois multiples Un nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets : - le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ; - le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier. Revêtements antigel Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Wind power, as a new type of green energy, can be converted into electric energy through wind turbines. However, the extremely cold and harsh weather makes the blade surface easy to freeze, which seriously affects the capacity of wind power. In this study, a bilayer epoxy-based nanocomposite coating that consists of an electrothermal and superhydrophobic layer has been developed for anti-icing/deicing. The electrothermal layer consists of epoxy/silver-coated copper (Ag–Cu) and epoxy/multi-walled carbon nanotubes (MWCNTs) nanocomposites. Epoxy/Ag–Cu coating showed high electrical conductivity, which can quickly generate heat under voltage. Epoxy/MWCNTs coating exhibited high thermal conductivity, which conducts heat to the whole surface. The superhydrophobic layer was fabricated by epoxy/SiO2/hexadecyltrimethoxysilane (HDTMS) nanocomposite, which covered the top of electrothermal layer. The designed bilayer epoxy nanocomposite coating displayed electrical power consumption (0.2 W), super hydrophobicity (static and dynamic water contact angle of 156.3° and 3°, respectively), low ice adhesion (0.01 MPa), long icing time (312 s), short deicing time (41 s), and good wear, acid, alkali, and salt resistance, making it promising for industrial application on wind turbine blades. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of electrothermal layer-electric heating coating - Preparation of electrothermal layer-heat transfer coating - Preparation of superhydrophobic coating - Characterization methods - RESULTS AND DISCUSSION : Electrothermal layer of anti-icing/deicing coating - Superhydrophobic layer of anti-icing/deicing coating - Anti-icing/deicing property of the coating - Table 1 : Electric heating coating sample formula - Table 2 : Heat transfer coating sample formula - Table 3 : Superhydrophobic coating sample formula - Table 4 : Comparison table of the properties of the electrothermal superhydrophobic coatings for anti-icing/deicing DOI : https://doi.org/10.1007/s11998-023-00762-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00762-x.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39971 [article]

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