[article]
| Titre : |
Preparation of novel organo-montmorillonite and its influence on the acid resistance of hybrid cathodic electrodeposition polyurethane coating |
| Type de document : |
texte imprimé |
| Auteurs : |
Zijian Li, Auteur ; Cuiping Li, Auteur ; Dongxin Li, Auteur ; Yuxiang Jiang, Auteur ; Zaifeng Li, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 597-605 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Electrophorèse
Matériaux hybrides
Montmorillonite
Polymères à terminaison hydroxyle
Polyuréthanes
Pulvérisation cathodique
Résistance chimique
Revêtements:Peinture
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.
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Based on the super-composite effect of clay minerals consisting of silicate layers on the polymer, nano-hybrid organic–inorganic composites have attracted great interest. In this paper, a novel organoclay with reactive hydroxyl group was prepared by incorporation into a hydroxyl-terminated cationic polyurethane oligomer (HTCPU) via interlamination. Sodium montmorillonite was organically modified with HTCPU oligomers in the water medium. The modified organo-montmorillonite was characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction, and thermogravimetric analysis. After sequential poly-addition reactions, the hydroxyl-terminated polyurethane hybrid resins with nano-silica layers were prepared and then the resin mixed with blocked hexamethylene diisocyanate trimer (crosslinking agent) in advance and then was emulsified with deionized water to produce the nano-hybrid electrophoresis coating. A series of PU films were prepared by the electrophoresis process. The optimized baking temperature was determined by in situ FTIR, and the effect of the organo-montmorillonite content on the acid resistance of film was studied. When the mass fraction of organo-montmorillonite was about 0.35%, the PU film showed the best acid resistance. It was found that the desirable appearance and properties could be obtained by a prebake of a temperature of 80°C to remove water in the wet film to avoid the pinholes in the paint film for 20 min, followed by a baking temperature of 135°C for 60 min. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of water-dispersed hydroxyl-terminated cationic polyurethand oligomers - Preparation of novel OMMT with reactive hydroxyl group - Preparatioin of nano-clay hybrid electrophoresis resins - Preparation of electrodeposited PU films
- CHARACTERIZATION FTIR spectroscopy - X-ray diffraction - Thermogravimetric analysis - In situ FTIR analysis - Transmission electron microscopy - Acid resistance
- RESULTS AND DISCUSSION : Characterization of novel OMMT |
| DOI : |
10.1007/s11998-018-0141-9 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0141-9.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32428 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 597-605
[article]
|
Aller sur edunet
Accueil
Preparation of novel organo-montmorillonite and its influence on the acid resistance of hybrid cathodic electrodeposition polyurethane coating in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
