The preparation of epoxy/clay nanocomposites (NCs) and their insertion into coatings are of great importance since the NCs could enhance the protective performances. In this study, epoxy NCs with 1-10 wt% of nanoclay Cloisite 30B (C30B) were prepared by the sonication-assisted solution method. The rheological measurements of epoxy/C30B suspensions revealed non-Newtonian, shear-thinning behavior of the uncured NCs, with an increase in the viscosity, yield stress, and shear modules with increasing organoclay content, while the dispersion effectiveness of C30B decreased. A significant enhancement of the rheological parameters was observed at the second percolation threshold (4.1 vol%) due to the formation of a continuous network of 45-layer-thick tactoids. Although NCs with 1-3 wt% C30B exhibited slightly reduced mechanical and adhesion properties compared with the cured reference epoxy resin, the epoxy primer and topcoat based on NC with 1 wt% C30B generally displayed improved impact res...istance and maintained flexibility, pendulum hardness, and good adhesion properties. Two-layer coating systems, i.e., NC-based primers and topcoats, had higher corrosion stability in a salt spray chamber compared to the unmodified system.
TY - JOUR
AU - Tomić, Miloš D.
AU - Dunjić, Branko
AU - Bajat, Jelena
AU - Likić, Violeta
AU - Rogan, Jelena
AU - Đonlagić, Jasna
PY - 2016
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3435
AB - The preparation of epoxy/clay nanocomposites (NCs) and their insertion into coatings are of great importance since the NCs could enhance the protective performances. In this study, epoxy NCs with 1-10 wt% of nanoclay Cloisite 30B (C30B) were prepared by the sonication-assisted solution method. The rheological measurements of epoxy/C30B suspensions revealed non-Newtonian, shear-thinning behavior of the uncured NCs, with an increase in the viscosity, yield stress, and shear modules with increasing organoclay content, while the dispersion effectiveness of C30B decreased. A significant enhancement of the rheological parameters was observed at the second percolation threshold (4.1 vol%) due to the formation of a continuous network of 45-layer-thick tactoids. Although NCs with 1-3 wt% C30B exhibited slightly reduced mechanical and adhesion properties compared with the cured reference epoxy resin, the epoxy primer and topcoat based on NC with 1 wt% C30B generally displayed improved impact resistance and maintained flexibility, pendulum hardness, and good adhesion properties. Two-layer coating systems, i.e., NC-based primers and topcoats, had higher corrosion stability in a salt spray chamber compared to the unmodified system.
PB - Springer, New York
T2 - Journal of Coatings Technology and Research
T1 - Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties
EP - 456
IS - 3
SP - 439
VL - 13
DO - 10.1007/s11998-015-9762-4
ER -
@article{
author = "Tomić, Miloš D. and Dunjić, Branko and Bajat, Jelena and Likić, Violeta and Rogan, Jelena and Đonlagić, Jasna",
year = "2016",
abstract = "The preparation of epoxy/clay nanocomposites (NCs) and their insertion into coatings are of great importance since the NCs could enhance the protective performances. In this study, epoxy NCs with 1-10 wt% of nanoclay Cloisite 30B (C30B) were prepared by the sonication-assisted solution method. The rheological measurements of epoxy/C30B suspensions revealed non-Newtonian, shear-thinning behavior of the uncured NCs, with an increase in the viscosity, yield stress, and shear modules with increasing organoclay content, while the dispersion effectiveness of C30B decreased. A significant enhancement of the rheological parameters was observed at the second percolation threshold (4.1 vol%) due to the formation of a continuous network of 45-layer-thick tactoids. Although NCs with 1-3 wt% C30B exhibited slightly reduced mechanical and adhesion properties compared with the cured reference epoxy resin, the epoxy primer and topcoat based on NC with 1 wt% C30B generally displayed improved impact resistance and maintained flexibility, pendulum hardness, and good adhesion properties. Two-layer coating systems, i.e., NC-based primers and topcoats, had higher corrosion stability in a salt spray chamber compared to the unmodified system.",
publisher = "Springer, New York",
journal = "Journal of Coatings Technology and Research",
title = "Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties",
pages = "456-439",
number = "3",
volume = "13",
doi = "10.1007/s11998-015-9762-4"
}
Tomić, M. D., Dunjić, B., Bajat, J., Likić, V., Rogan, J.,& Đonlagić, J.. (2016). Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties. in Journal of Coatings Technology and Research
Springer, New York., 13(3), 439-456.
https://doi.org/10.1007/s11998-015-9762-4
Tomić MD, Dunjić B, Bajat J, Likić V, Rogan J, Đonlagić J. Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties. in Journal of Coatings Technology and Research. 2016;13(3):439-456.
doi:10.1007/s11998-015-9762-4 .
Tomić, Miloš D., Dunjić, Branko, Bajat, Jelena, Likić, Violeta, Rogan, Jelena, Đonlagić, Jasna, "Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties" in Journal of Coatings Technology and Research, 13, no. 3 (2016):439-456,
https://doi.org/10.1007/s11998-015-9762-4 . .
