Curable hybrid materials for corrosion protection of steel : development and application of UV-cured 3-methacryloxypropyltrimethoxysilane-derived coatings / Kevin M. Scotland in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 977-989 Titre : Curable hybrid materials for corrosion protection of steel : development and application of UV-cured 3-methacryloxypropyltrimethoxysilane-derived coatings Type de document : texte imprimé Auteurs : Kevin M. Scotland, Auteur ; Shegufa Shetranjiwalla, Auteur ; Andrew J. Vreugdenhil, Auteur Année de publication : 2020 Article en page(s) : p. 977-989 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Anticorrosifs Anticorrosion Caractérisation Condensation Dip-coating Essais (technologie) Formulation (Génie chimique) Hydrolyse Métaux -- Revêtements protecteurs Méthacryloxypropyltriméthoxysilane Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : A UV-crosslinkable two-component organically modified silicate (ORMOSIL) sol–gel coating was made using 3-methacryloxypropyltrimethoxysilane (MaPTMS) and tetraethoxysilane (TEOS) in two stages. In the first stage, key synthetic parameters, such as use of co-solvents, reaction temperature, reaction time, and catalyst, were optimized for the rapid hydrolysis and condensation of the ORMOSIL. The ORMOSIL material was made using isopropanol as the solvent and HNO3 as the acid catalyst. This resulted in a sol–gel that underwent rapid hydrolysis in 35 s. The ORMOSIL demonstrated extensive condensation after 10 min of stirring at room temperature followed by 10 min of heating at 60°C as monitored by 29Si-NMR. In the second stage, the ORMOSIL was successfully crosslinked with up to 70% consumption of the acryl functionality within 5 min under UV light exposure in the presence of photoinitiator. The UV-crosslinked coating exhibited high adhesion to low-carbon steel and impeded substrate corrosion from 17 to 25 h under an accelerated corrosive environment. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of sol-gel formulation MaT - Variation of solvent and acid catalysts - Dip coating and crosslinking - Characterization - Corrosion performance testing - RESULTS AND DISCUSSION : Sol-gel formulation - Hydrolysis and condensation - UV crosslinking - Corrosion inhibition results DOI : https://doi.org/10.1007/s11998-019-00317-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00317-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34385 [article]

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The preparation and application of a nanocomposite tanning agent-MPNS-SMA / Hui Pan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 4 (07-08/2005)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 4 (07-08/2005) . - p. 153-156 Titre : The preparation and application of a nanocomposite tanning agent-MPNS-SMA Type de document : texte imprimé Auteurs : Hui Pan, Auteur ; Zhijun Zhang, Auteur ; Juxian Zhang, Auteur ; Hongxin Dang, Auteur Année de publication : 2005 Article en page(s) : p. 153-156 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Caractérisation Copolymère styrène acide maléique Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Cuirs et peaux de moutons Dioxyde de silicium Matériaux hybrides Méthacryloxypropyltriméthoxysilane Nanoparticules Peroxyde de benzoyle Réaction de couplage Retannage Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : r-Methacryloxy propyltrimethoxysilane (MPTMS) was used as a coupling agent to introduce vinyl groups onto the surface of nano SiO2. A nanocomposite of MPNS/SMA was prepared by the polymerization of methacryloxypropyl nano SiO2 (MPNS), styrene (ST) and maleic anhydride (MA) with benzoyl peroxide (BPO)as initiator in toluene. The structure of the MPNS/SMA nanocomposite was characterized by FT-IR (Fourier Transform Infrared Spectroscopy) and TEM (Transmission Electron Microscope). A series of tanning experiments have been carried out to compare the tanning and retanning properties of MPNS/SMA and styrene-maleic anhydride copolymer (SMA). The results show that MPNS/SMA has good tanning capability, and that leather treated with the MPNS/SMA nanocomposite is of good quality. Note de contenu : - EXPERIMENTAL PROCEDURES : Chemicals and instrumentation - Preparation of MPNS/SMA nanocomposite - TANNING WITH MPNS/SMA NANOCOMPOSITE AND SMA COPOLYMER : General procedure for tanning - Retanning with MPNS/SMA, SMA and chrome tanning agent - Comparison application experiment with MPNS/SMA nanocomposite - RESULTS AND DISCUSSION : The analysis of MPNS/SMA and MPNS by FT-IR and TEM - Results of application comparison experiments - Table 1 : Retanning process of blue sheep leather treated with MPNS/SMA, SMA and chrome powder - Table 2 : Results of tanning with MPNS/SMA and SMA - Table 3 : Results of physical-mechanical testing of retanned leathers - 3 types of retannage (1% offer) - Table 4 : Results of physical-mechanical testing of retanned leathers - 3 types of retannage En ligne : https://drive.google.com/file/d/12oiH2T8TpaGXv-Avk7IChXfn_-s8soG_/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39250 [article]

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