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 . .

TY  - JOUR
AU  - Dikić, Jelena
AU  - Hrenović, Jasna
AU  - Goić-Barisić, Ivana
AU  - Tomić, Miloš D.
AU  - Rajić, Nevenka
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3122
AB  - The multidrug-resistant bacteria Acinetobacter baumannii cause serious hospital infections. Commercial poly(vinyl chloride) (PVC) used for endotracheal tubes was modified in order to obtain a composite with an antibacterial effect towards a clinical isolate of A. baumannii ST145. The composites were prepared by addition of different amounts of copper-containing zeolite tuff (CuZ) and by successive impregnation with D-tyrosine (D-Tyr) solution. The composites that were obtained by addition of CuZ (CuZ PVC) only did not exhibit an antibacterial effect. The impregnation of the CuZ PVC by D-Tyr resulted in an antibacterial effect which was explained by a synergistic effect of CuZ and D-Tyr. Rheological tests confirmed that the modification of PVC by CuZ does not affect its processability and reformability.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii
EP  - 826
IS  - 6
SP  - 819
VL  - 80
DO  - 10.2298/JSC141225017M
ER  - 

@article{
author = "Dikić, Jelena and Hrenović, Jasna and Goić-Barisić, Ivana and Tomić, Miloš D. and Rajić, Nevenka",
year = "2015",
abstract = "The multidrug-resistant bacteria Acinetobacter baumannii cause serious hospital infections. Commercial poly(vinyl chloride) (PVC) used for endotracheal tubes was modified in order to obtain a composite with an antibacterial effect towards a clinical isolate of A. baumannii ST145. The composites were prepared by addition of different amounts of copper-containing zeolite tuff (CuZ) and by successive impregnation with D-tyrosine (D-Tyr) solution. The composites that were obtained by addition of CuZ (CuZ PVC) only did not exhibit an antibacterial effect. The impregnation of the CuZ PVC by D-Tyr resulted in an antibacterial effect which was explained by a synergistic effect of CuZ and D-Tyr. Rheological tests confirmed that the modification of PVC by CuZ does not affect its processability and reformability.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii",
pages = "826-819",
number = "6",
volume = "80",
doi = "10.2298/JSC141225017M"
}

Dikić, J., Hrenović, J., Goić-Barisić, I., Tomić, M. D.,& Rajić, N.. (2015). Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 80(6), 819-826.
https://doi.org/10.2298/JSC141225017M

Dikić J, Hrenović J, Goić-Barisić I, Tomić MD, Rajić N. Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii. in Journal of the Serbian Chemical Society. 2015;80(6):819-826.
doi:10.2298/JSC141225017M .

Dikić, Jelena, Hrenović, Jasna, Goić-Barisić, Ivana, Tomić, Miloš D., Rajić, Nevenka, "Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii" in Journal of the Serbian Chemical Society, 80, no. 6 (2015):819-826,
https://doi.org/10.2298/JSC141225017M . .

TY  - JOUR
AU  - Tomić, Miloš D.
AU  - Dunjić, Branko
AU  - Likić, Violeta
AU  - Bajat, Jelena
AU  - Rogan, Jelena
AU  - Đonlagić, Jasna
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2760
AB  - Epoxy/clay nanocomposites (NC) have become a very interesting topic among researchers in the past two decades because nanoclays have a positive effect on the mechanical, thermal and especially barrier and anticorrosive performances of the polymers. In this study epoxy NCs and NC-based epoxy coatings were prepared by the solution intercalation method using Cloisite 30B as nanoclay. WAXD and SEM analyses revealed that a mainly exfoliated structure was obtained in epoxy NC with 1 wt% clay content, while higher clay loadings reduced the number of exfoliated clay nanolayers and produced a mainly intercalated structure. EIS, TGA and DMA analyses showed that epoxy NCs with clay content below 5 wt% exhibited increased corrosion stability, thermal stability, glass transition temperature (T-g) and storage modulus (G'), in both glassy and rubbery states due to the nanoscale dispersion of Cloisite 30B and the barrier effect of individual nanolayers. Enhanced mechanical properties were also noticed at higher clay loadings, but the rate of improvement was lower. The highest extent of exfoliation and the most homogeneous macromolecular network was found for NC with 1 wt% of clay, leading to the highest improvement of thermal and anticorrosive properties. The salt spray test results showed that anticorrosive properties of epoxy coatings in the presence of 3 wt% and especially 1 wt% of Cloisite 308 were significantly better, thus indicating that nanoclay efficiently modifies the commercial epoxy coatings.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - The use of nanoclay in preparation of epoxy anticorrosive coatings
EP  - 527
IS  - 2
SP  - 518
VL  - 77
DO  - 10.1016/j.porgcoat.2013.11.017
ER  - 

@article{
author = "Tomić, Miloš D. and Dunjić, Branko and Likić, Violeta and Bajat, Jelena and Rogan, Jelena and Đonlagić, Jasna",
year = "2014",
abstract = "Epoxy/clay nanocomposites (NC) have become a very interesting topic among researchers in the past two decades because nanoclays have a positive effect on the mechanical, thermal and especially barrier and anticorrosive performances of the polymers. In this study epoxy NCs and NC-based epoxy coatings were prepared by the solution intercalation method using Cloisite 30B as nanoclay. WAXD and SEM analyses revealed that a mainly exfoliated structure was obtained in epoxy NC with 1 wt% clay content, while higher clay loadings reduced the number of exfoliated clay nanolayers and produced a mainly intercalated structure. EIS, TGA and DMA analyses showed that epoxy NCs with clay content below 5 wt% exhibited increased corrosion stability, thermal stability, glass transition temperature (T-g) and storage modulus (G'), in both glassy and rubbery states due to the nanoscale dispersion of Cloisite 30B and the barrier effect of individual nanolayers. Enhanced mechanical properties were also noticed at higher clay loadings, but the rate of improvement was lower. The highest extent of exfoliation and the most homogeneous macromolecular network was found for NC with 1 wt% of clay, leading to the highest improvement of thermal and anticorrosive properties. The salt spray test results showed that anticorrosive properties of epoxy coatings in the presence of 3 wt% and especially 1 wt% of Cloisite 308 were significantly better, thus indicating that nanoclay efficiently modifies the commercial epoxy coatings.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "The use of nanoclay in preparation of epoxy anticorrosive coatings",
pages = "527-518",
number = "2",
volume = "77",
doi = "10.1016/j.porgcoat.2013.11.017"
}

Tomić, M. D., Dunjić, B., Likić, V., Bajat, J., Rogan, J.,& Đonlagić, J.. (2014). The use of nanoclay in preparation of epoxy anticorrosive coatings. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 77(2), 518-527.
https://doi.org/10.1016/j.porgcoat.2013.11.017

Tomić MD, Dunjić B, Likić V, Bajat J, Rogan J, Đonlagić J. The use of nanoclay in preparation of epoxy anticorrosive coatings. in Progress in Organic Coatings. 2014;77(2):518-527.
doi:10.1016/j.porgcoat.2013.11.017 .

Tomić, Miloš D., Dunjić, Branko, Likić, Violeta, Bajat, Jelena, Rogan, Jelena, Đonlagić, Jasna, "The use of nanoclay in preparation of epoxy anticorrosive coatings" in Progress in Organic Coatings, 77, no. 2 (2014):518-527,
https://doi.org/10.1016/j.porgcoat.2013.11.017 . .