| Titre : |
Preparation of PVA/PU/PUA microcapsules and application in self-healing two-component waterborne polyurethane coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Xinmeng Xu, Auteur ; Zhongqun Zhou, Auteur ; Liangrong Qin, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 977-988 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Anticorrosifs
Anticorrosion
Caractérisation
Microcapsules
Polyacétate de vinyle
Polymères -- Synthèse
Polyurée
Polyuréthanes
Revêtement autoréparant
Revêtements bi-composant
Revêtements en phase aqueuse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
It is difficult to produce coatings that have good mechanical and self-healing properties. In this study, polyvinyl alcohol/polyurethane/polyurea (PVA/PU/PUA) microcapsules (MCs) loaded with isophorone diisocyanate (IPDI) as core materials were first prepared by interfacial polymerization in an oil-in-water emulsion using different PVA as an emulsifier. The MCs were then uniformly dispersed in the matrix. Optical microscopy and scanning electron microscopy revealed that the size of MCs decreased as alcoholysis and polymerization degree of PVA increased. Thermogravimetric analysis showed that the MCs prepared with the high polymerization or alcoholysis degree of PVA revealed outstanding thermal stability, and the initial decomposition temperature increased by approximately 100°C compared with IPDI. Furthermore, the self-healing performance of the two-component waterborne polyurethane (2K WPU) coating system containing MCs was investigated. The 2K WPU coatings with 9 wt% PVA/PU/PUA MCs exhibited excellent self-healing, mechanical properties, and corrosion resistance, and indicated a high potential for smart coating. |
| Note de contenu : |
- EXPERIMENTAL METHODS AND MATERIALS : Materials - Synthesis of PVA solution - Synthesis of MCs - Preparation of self-healing 2K - WPU coatings - Characterization
- RESULTS AND DISCUSSION : Analysis and characterization of MCs - Self-healing performance of 2K WPU
- Table 1 : Thermal weight loss data of MCs and capsule shells
- Table 2 : Film performance of 2K WPU coatings loaded with different types of MCs
- Table 3 : Coating performance of 2K WPU with different MCs content |
| DOI : |
https://doi.org/10.1007/s11998-021-00577-8 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00577-8.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38091 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 977-988
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Preparation of PVA/PU/PUA microcapsules and application in self-healing two-component waterborne polyurethane coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
