| Titre : |
Facile fabrication and modification of polyacrylate/silica nanocomposite latexes prepared by silica sol and silane coupling agent |
| Type de document : |
texte imprimé |
| Auteurs : |
Liangfang Zhai, Auteur ; Deping Lu, Auteur ; Niannian Fan, Auteur ; Xiaoli Wang, Auteur ; Rong Guan, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 799-810 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Latex
Matériaux hybrides
Nanoparticules
Polyacrylates
Réaction de couplage
Revêtements
Rhéologie
Silanes
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.
Taille des particules
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| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Polyacrylate/silica nanocomposite latexes were prepared by silica sol and facilely modified with a silane coupling agent ?-methacryloxypropyltrimethoxysilane (KH-570) aimed at reinforcing the interaction between silica nanoparticles and latex particles in a convenient way. The effects of silica sol and KH-570 amounts on the performance of latexes and films are discussed. Particle size and morphology tests demonstrated that the silica nanoparticles could form hydrogen bond interactions between latex particles, and thus influence the rheological properties of latexes. Tensile measurements and SEM photographs showed the reinforcing and toughening roles of silica nanoparticles. SEM images also indicated that the addition of silica sol increased the roughness of films, which resulted in the increase of hydrophilic silanol groups on the film surface and the decrease of water resistance of latex films. The latex films retained good adhesion force, flexibility, and impact resistance even when the silica sol content was as much as 25%. TGA data revealed that the incorporation of silica sol enhanced the thermal stability of the films. After introducing KH-570, the particle size increased with the increase of the amount of KH-570. Moreover, the addition of KH-570 improved the water resistance and maintained other properties of the latex films appropriately. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Synthesis of PAE/silica nanocomposite latexes - Synthesis of KA-570-modified PAE/silica nanocomposite latexes - Characterization
- Synthesis of PAE/silica nanocomposite latexes and KA-570-modified PAE/silica nanocomposite latexes - Particles size - Rheological properties - Tensile measurement - Morphology of latex films - Water absorption and WCA - Other properties of latex films - Thermal stability |
| DOI : |
10.1007/s11998-013-9513-3 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9513-3.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19819 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 6 (11/2013) . - p. 799-810
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Facile fabrication and modification of polyacrylate/silica nanocomposite latexes prepared by silica sol and silane coupling agent in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)
