TY  - JOUR
AU  - Janićijević, Aleksandra
AU  - Filipović, Suzana
AU  - Sknepnek, Aleksandra
AU  - Salević-Jelić, Ana
AU  - Jančić-Heinemann, Radmila
AU  - Petrović, Miloš
AU  - Petronijević, Ivan
AU  - Stamenović, Marina
AU  - Živković, Predrag
AU  - Potkonjak, Nebojša
AU  - Pavlović, Vladimir B.
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13219
AB  - This study presents an analysis of films which consist of two layers; one layer is PVDF as the matrix, along with fillers BaTiO3 (BT), and the second is one bacterial nanocellulose (BNC) filled with Fe3O4. The mass fraction of BT in PVDF was 5%, and the samples were differentiated based on the duration of the mechanical activation of BT. This innovative PVDF laminate polymer with environmentally friendly fillers aligns with the concept of circular usage, resulting in a reduction in plastic content and potential improvement of the piezoelectric properties of the entire composite. This work presents new, multifunctional “green” packaging materials that potentially could be a good alternative to specific popular materials used for this purpose. The synthesis of the films was carried out using the hot press method. Tensile tests, water vapor permeability examination, and structural analyses using SEM-EDS and FTIR have been conducted. The sample PVDF/BT20/BNC/Fe3O4 exhibited the best barrier properties (impermeability to water vapor), while the highest tensile strength and toughness were exhibited by the PVDF/BT5/BNC/Fe3O4 sample.
T2  - Polymers
T1  - Structural, Mechanical, and Barrier Properties of the Polyvinylidene Fluoride-Bacterial Nanocellulose-Based Hybrid Composite
VL  - 16
IS  - 8
SP  - 1033
DO  - 10.3390/polym16081033
ER  - 

@article{
author = "Janićijević, Aleksandra and Filipović, Suzana and Sknepnek, Aleksandra and Salević-Jelić, Ana and Jančić-Heinemann, Radmila and Petrović, Miloš and Petronijević, Ivan and Stamenović, Marina and Živković, Predrag and Potkonjak, Nebojša and Pavlović, Vladimir B.",
year = "2024",
abstract = "This study presents an analysis of films which consist of two layers; one layer is PVDF as the matrix, along with fillers BaTiO3 (BT), and the second is one bacterial nanocellulose (BNC) filled with Fe3O4. The mass fraction of BT in PVDF was 5%, and the samples were differentiated based on the duration of the mechanical activation of BT. This innovative PVDF laminate polymer with environmentally friendly fillers aligns with the concept of circular usage, resulting in a reduction in plastic content and potential improvement of the piezoelectric properties of the entire composite. This work presents new, multifunctional “green” packaging materials that potentially could be a good alternative to specific popular materials used for this purpose. The synthesis of the films was carried out using the hot press method. Tensile tests, water vapor permeability examination, and structural analyses using SEM-EDS and FTIR have been conducted. The sample PVDF/BT20/BNC/Fe3O4 exhibited the best barrier properties (impermeability to water vapor), while the highest tensile strength and toughness were exhibited by the PVDF/BT5/BNC/Fe3O4 sample.",
journal = "Polymers",
title = "Structural, Mechanical, and Barrier Properties of the Polyvinylidene Fluoride-Bacterial Nanocellulose-Based Hybrid Composite",
volume = "16",
number = "8",
pages = "1033",
doi = "10.3390/polym16081033"
}

Janićijević, A., Filipović, S., Sknepnek, A., Salević-Jelić, A., Jančić-Heinemann, R., Petrović, M., Petronijević, I., Stamenović, M., Živković, P., Potkonjak, N.,& Pavlović, V. B.. (2024). Structural, Mechanical, and Barrier Properties of the Polyvinylidene Fluoride-Bacterial Nanocellulose-Based Hybrid Composite. in Polymers, 16(8), 1033.
https://doi.org/10.3390/polym16081033

Janićijević A, Filipović S, Sknepnek A, Salević-Jelić A, Jančić-Heinemann R, Petrović M, Petronijević I, Stamenović M, Živković P, Potkonjak N, Pavlović VB. Structural, Mechanical, and Barrier Properties of the Polyvinylidene Fluoride-Bacterial Nanocellulose-Based Hybrid Composite. in Polymers. 2024;16(8):1033.
doi:10.3390/polym16081033 .

Janićijević, Aleksandra, Filipović, Suzana, Sknepnek, Aleksandra, Salević-Jelić, Ana, Jančić-Heinemann, Radmila, Petrović, Miloš, Petronijević, Ivan, Stamenović, Marina, Živković, Predrag, Potkonjak, Nebojša, Pavlović, Vladimir B., "Structural, Mechanical, and Barrier Properties of the Polyvinylidene Fluoride-Bacterial Nanocellulose-Based Hybrid Composite" in Polymers, 16, no. 8 (2024):1033,
https://doi.org/10.3390/polym16081033 . .

TY  - JOUR
AU  - Jelić, Aleksandra
AU  - Sekulić, Milica
AU  - Travica, Milan
AU  - Gržetić, Jelena
AU  - Ugrinović, Vukašin
AU  - Marinković, Aleksandar D.
AU  - Božić, Aleksandra
AU  - Stamenović, Marina
AU  - Putić, Slaviša
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10237
AB  - In this study, silicate nanofillers; dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite; were synthesized using four different methods and incorporated into the epoxy resin to improve its mechanical properties. Characterization of the newly synthesized nanofillers was performed using Fourier-transformation infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The purpose of this study was to analyze newly developed composite materials reinforced with silicate nanoparticles utilizing tensile testing and a full-field non-contact 3D Digital Image Correlation (DIC) method. Analysis of deformation and displacement fields gives precise material behavior during testing. Testing results allowed a more reliable assessment of the structural integrity of epoxy composite materials reinforced using different silicate nanofillers. It was concluded that the addition of 3% of dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite lead to the increasement of tensile strength up to 31.5%, 29.0%, 27.5%, and 23.5% in comparison with neat epoxy, respectively. In order to offer more trustworthy information about the viscoelastic behavior of neat epoxy and composites, a dynamic mechanical analysis (DMA) was also performed and rheological measurements of uncured epoxy matrix and epoxy suspensions were obtained.
T2  - Polymers
T1  - Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC)
VL  - 14
IS  - 6
SP  - 1255
DO  - 10.3390/polym14061255
ER  - 

@article{
author = "Jelić, Aleksandra and Sekulić, Milica and Travica, Milan and Gržetić, Jelena and Ugrinović, Vukašin and Marinković, Aleksandar D. and Božić, Aleksandra and Stamenović, Marina and Putić, Slaviša",
year = "2022",
abstract = "In this study, silicate nanofillers; dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite; were synthesized using four different methods and incorporated into the epoxy resin to improve its mechanical properties. Characterization of the newly synthesized nanofillers was performed using Fourier-transformation infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The purpose of this study was to analyze newly developed composite materials reinforced with silicate nanoparticles utilizing tensile testing and a full-field non-contact 3D Digital Image Correlation (DIC) method. Analysis of deformation and displacement fields gives precise material behavior during testing. Testing results allowed a more reliable assessment of the structural integrity of epoxy composite materials reinforced using different silicate nanofillers. It was concluded that the addition of 3% of dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite lead to the increasement of tensile strength up to 31.5%, 29.0%, 27.5%, and 23.5% in comparison with neat epoxy, respectively. In order to offer more trustworthy information about the viscoelastic behavior of neat epoxy and composites, a dynamic mechanical analysis (DMA) was also performed and rheological measurements of uncured epoxy matrix and epoxy suspensions were obtained.",
journal = "Polymers",
title = "Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC)",
volume = "14",
number = "6",
pages = "1255",
doi = "10.3390/polym14061255"
}

Jelić, A., Sekulić, M., Travica, M., Gržetić, J., Ugrinović, V., Marinković, A. D., Božić, A., Stamenović, M.,& Putić, S.. (2022). Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC). in Polymers, 14(6), 1255.
https://doi.org/10.3390/polym14061255

Jelić A, Sekulić M, Travica M, Gržetić J, Ugrinović V, Marinković AD, Božić A, Stamenović M, Putić S. Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC). in Polymers. 2022;14(6):1255.
doi:10.3390/polym14061255 .

Jelić, Aleksandra, Sekulić, Milica, Travica, Milan, Gržetić, Jelena, Ugrinović, Vukašin, Marinković, Aleksandar D., Božić, Aleksandra, Stamenović, Marina, Putić, Slaviša, "Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC)" in Polymers, 14, no. 6 (2022):1255,
https://doi.org/10.3390/polym14061255 . .

TY  - CHAP
AU  - Jelić, Aleksandra
AU  - Božić, Aleksandra
AU  - Stamenović, Marina
AU  - Sekulić, Milica
AU  - Porobić, Slavica
AU  - Dikić, Stefan
AU  - Putić, Slaviša
AU  - Mitrović, Nenad
AU  - Mladenović, Goran
AU  - Mitrović, Aleksandra
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9636
AB  - Halloysite nanotubes (HNTs), naturally occurring as aluminosilicate nanoclay mineral, have recently emerged as a possible nanomaterial for countless applications due to their specific chemical structure, tubular shape, high aspect ratio, biocompatibility and low toxicity. In this study, HNTs were incorporated into the epoxy resin matrix to improve its mechanical properties and thermal stability. However, heterogeneous size, surface charge and surface hydrogen bond formation, result in aggregation of HNTs in epoxies to a certain extent. Three specific techniques were used to integrate HNTs into neat epoxy resin (NE). The structure and morphology of the embedded nanotubes were confirmed by Fourier-transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Tensile testing was carried out and the fractured surface of the tested specimen was analysed using scanning electron microscopy (SEM). The thermal stability of the prepared nanocomposite materials was investigated by thermogravimetric (TG) and derivative thermogravimetry (DTG) studies. The obtained results indicated that improved properties of HNTs/epoxy nanocomposite materials were related to the unique properties of well-dispersed HNTs, agglomerate scale, and reduced void presence, and could be controlled by the manufacturing processes.
PB  - Springer International Publishing
T2  - Experimental and Computational Investigations in Engineering
T1  - Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials
SP  - 310
EP  - 325
DO  - 10.1007/978-3-030-58362-0_18
ER  - 

@inbook{
author = "Jelić, Aleksandra and Božić, Aleksandra and Stamenović, Marina and Sekulić, Milica and Porobić, Slavica and Dikić, Stefan and Putić, Slaviša and Mitrović, Nenad and Mladenović, Goran and Mitrović, Aleksandra",
year = "2021",
abstract = "Halloysite nanotubes (HNTs), naturally occurring as aluminosilicate nanoclay mineral, have recently emerged as a possible nanomaterial for countless applications due to their specific chemical structure, tubular shape, high aspect ratio, biocompatibility and low toxicity. In this study, HNTs were incorporated into the epoxy resin matrix to improve its mechanical properties and thermal stability. However, heterogeneous size, surface charge and surface hydrogen bond formation, result in aggregation of HNTs in epoxies to a certain extent. Three specific techniques were used to integrate HNTs into neat epoxy resin (NE). The structure and morphology of the embedded nanotubes were confirmed by Fourier-transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Tensile testing was carried out and the fractured surface of the tested specimen was analysed using scanning electron microscopy (SEM). The thermal stability of the prepared nanocomposite materials was investigated by thermogravimetric (TG) and derivative thermogravimetry (DTG) studies. The obtained results indicated that improved properties of HNTs/epoxy nanocomposite materials were related to the unique properties of well-dispersed HNTs, agglomerate scale, and reduced void presence, and could be controlled by the manufacturing processes.",
publisher = "Springer International Publishing",
journal = "Experimental and Computational Investigations in Engineering",
booktitle = "Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials",
pages = "310-325",
doi = "10.1007/978-3-030-58362-0_18"
}

Jelić, A., Božić, A., Stamenović, M., Sekulić, M., Porobić, S., Dikić, S., Putić, S., Mitrović, N., Mladenović, G.,& Mitrović, A.. (2021). Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials. in Experimental and Computational Investigations in Engineering
Springer International Publishing., 310-325.
https://doi.org/10.1007/978-3-030-58362-0_18

Jelić A, Božić A, Stamenović M, Sekulić M, Porobić S, Dikić S, Putić S, Mitrović N, Mladenović G, Mitrović A. Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials. in Experimental and Computational Investigations in Engineering. 2021;:310-325.
doi:10.1007/978-3-030-58362-0_18 .

Jelić, Aleksandra, Božić, Aleksandra, Stamenović, Marina, Sekulić, Milica, Porobić, Slavica, Dikić, Stefan, Putić, Slaviša, Mitrović, Nenad, Mladenović, Goran, Mitrović, Aleksandra, "Effects of dispersion and particle-matrix interactions on mechanical and thermal properties of hnt/epoxy nanocomposite materials" in Experimental and Computational Investigations in Engineering (2021):310-325,
https://doi.org/10.1007/978-3-030-58362-0_18 . .