| Titre : |
Designing self-stratifying coatings through the study of pigment migration |
| Type de document : |
texte imprimé |
| Auteurs : |
Shahdad Zahedi, Auteur ; Davood Zaarei, Auteur ; Seyed Reza Ghaffarian, Auteur ; Maude Jimenez, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 288-293 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Angle de contact
Dioxyde de titane
Energie de surface
Epoxydes
Formulation (Génie chimique)
Oxyde de fer
Pigments inorganiques
Revêtements autostratifiants
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Self-stratifying coatings are smart coatings which represent a new generation of surface coatings for industry which offer the advantages of single-coat application, thereby reducing resources and potential pollution when compared to conventinal multi-layer coating systems.
In our work, the effect of pigments on stratification was studied. Ten formulations were made based on epoxy and fluorinated vinyl ether incorporation of inorganic pigments containing titanium dioxide and red iron oxide. Evaluations were made by scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDX) and mapping from cross-sections through the films. Results demonstrate that the affinity of the pigments for different resins, and also the quality of their dispersion and stabilisation in the initial phase, both play important roles in the stratification phenomena. |
| Note de contenu : |
- Materials
- Formulation and application
- Results and discussion : Stratification of clear coatings - Stratification of single-pigment coatings - Stratification of dual-pigment coatings
- Table 1 : Prepared formulations
- Table 2 : Percentage of elements in top and bottom areas in cross-section of clear coating formulation (Formula 3) by EDX
- Table 3 : Percentage of elements in top and bottom areas in cross-section of single-pigment formulations 4, 5, 7 and 8 by EDX
- Table 4 : Stratification type by formulation
- Table 5 : Percentage of elements in top and bottom areas in cross-section of single-pigment formulations 6, 9 and 10 by EDX
- Table 6 : Contact angle measurement and surface energies (polar and dispersive components) of films by using three liquids (water, ethylene glycol and di-iodomethane)
- Table 7 : Surface energy relations and stratification conditions
- Fig. 1 : SEM and mapping images for SSC clear coating system (formula 3)
- Fig. 2 : SEM and mapping images for single-pigment systems (formulations, 4, 5, 7 and 8)
- Fig. 3 : SEM and mapping images for dual-pigment systems (formulations 6, 9, and 10) |
| En ligne : |
https://drive.google.com/file/d/11o-EpvH5VXJK-GS1nC5NArN3pTtgN975/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31651 |
in SURFACE COATINGS INTERNATIONAL > Vol. 101.6 (12/2018 - 01/2019) . - p. 288-293
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