TY  - JOUR
AU  - Vijatović Petrović, Mirjana
AU  - Craciun, Floriana
AU  - Cordero, Francesco
AU  - MERCADELLI, ELISA
AU  - Ilić, Nikola
AU  - Despotovic, Zeljko V.
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - Galassi, Carmen
AU  - Stagnaro, Paola
AU  - Canu, Giovanna
AU  - Buscaglia, Maria Teresa
AU  - Brunengo, Elisabetta
PY  - 2024
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3211
AB  - In order to further improve the performance of 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3/
polyvinylidene fluoride (NBT-BT/PVDF) flexible composite films prepared by the
hot-pressing method, the effect of surface modification of the NBT-BT particles on
the structure and properties of the films was investigated. Two coupling agents,
namely, (3-aminopropyl)triethoxysilane (APTES) and dodecyl triethoxysilane
(DDTES) were added to enhance dispersion and interfacial adhesion of the active
phase powder with the polymer matrix. The highest amount of the electroactive
PVDF β-phase was formed in APTES-modified samples while in DDTES samples
mainly γ-phase was formed as shown by Fourier-transform infrared spectroscopy
analysis. Differential scanning calorimetry measurements indicated that the addition
of filler particles reduced the total crystallinity degree of the PVDF. Dielectric
permittivity values as well as dielectric losses decreased for silanized samples due
to reduced tension at the interface between particles and polymer. Strong intermolecular
interaction between the PVDF chains and the APTES-modified particles
led to enhanced breakdown strength of these samples. The highest level of
agglomeration in the DDTES-modified samples induced the deterioration of ferroelectric
properties. The highest voltage output of  15 V and 225 μW of powerwas
obtained for the APTES-modified harvester, evidencing their potential for energy
harvesting applications.
PB  - John Wiley and Sons Inc
T2  - Polymer Composites
T1  - Advantages and limitations of active phase silanization in PVDF composites: Focus on electrical properties and energy harvesting potential
EP  - 4446
IS  - 5
SP  - 4428
VL  - 45
DO  - 10.1002/pc.28071
ER  - 

@article{
author = "Vijatović Petrović, Mirjana and Craciun, Floriana and Cordero, Francesco and MERCADELLI, ELISA and Ilić, Nikola and Despotovic, Zeljko V. and Bobić, Jelena and Džunuzović, Adis and Galassi, Carmen and Stagnaro, Paola and Canu, Giovanna and Buscaglia, Maria Teresa and Brunengo, Elisabetta",
year = "2024",
abstract = "In order to further improve the performance of 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3/
polyvinylidene fluoride (NBT-BT/PVDF) flexible composite films prepared by the
hot-pressing method, the effect of surface modification of the NBT-BT particles on
the structure and properties of the films was investigated. Two coupling agents,
namely, (3-aminopropyl)triethoxysilane (APTES) and dodecyl triethoxysilane
(DDTES) were added to enhance dispersion and interfacial adhesion of the active
phase powder with the polymer matrix. The highest amount of the electroactive
PVDF β-phase was formed in APTES-modified samples while in DDTES samples
mainly γ-phase was formed as shown by Fourier-transform infrared spectroscopy
analysis. Differential scanning calorimetry measurements indicated that the addition
of filler particles reduced the total crystallinity degree of the PVDF. Dielectric
permittivity values as well as dielectric losses decreased for silanized samples due
to reduced tension at the interface between particles and polymer. Strong intermolecular
interaction between the PVDF chains and the APTES-modified particles
led to enhanced breakdown strength of these samples. The highest level of
agglomeration in the DDTES-modified samples induced the deterioration of ferroelectric
properties. The highest voltage output of  15 V and 225 μW of powerwas
obtained for the APTES-modified harvester, evidencing their potential for energy
harvesting applications.",
publisher = "John Wiley and Sons Inc",
journal = "Polymer Composites",
title = "Advantages and limitations of active phase silanization in PVDF composites: Focus on electrical properties and energy harvesting potential",
pages = "4446-4428",
number = "5",
volume = "45",
doi = "10.1002/pc.28071"
}

Vijatović Petrović, M., Craciun, F., Cordero, F., MERCADELLI, E., Ilić, N., Despotovic, Z. V., Bobić, J., Džunuzović, A., Galassi, C., Stagnaro, P., Canu, G., Buscaglia, M. T.,& Brunengo, E.. (2024). Advantages and limitations of active phase silanization in PVDF composites: Focus on electrical properties and energy harvesting potential. in Polymer Composites
John Wiley and Sons Inc., 45(5), 4428-4446.
https://doi.org/10.1002/pc.28071

Vijatović Petrović M, Craciun F, Cordero F, MERCADELLI E, Ilić N, Despotovic ZV, Bobić J, Džunuzović A, Galassi C, Stagnaro P, Canu G, Buscaglia MT, Brunengo E. Advantages and limitations of active phase silanization in PVDF composites: Focus on electrical properties and energy harvesting potential. in Polymer Composites. 2024;45(5):4428-4446.
doi:10.1002/pc.28071 .

Vijatović Petrović, Mirjana, Craciun, Floriana, Cordero, Francesco, MERCADELLI, ELISA, Ilić, Nikola, Despotovic, Zeljko V., Bobić, Jelena, Džunuzović, Adis, Galassi, Carmen, Stagnaro, Paola, Canu, Giovanna, Buscaglia, Maria Teresa, Brunengo, Elisabetta, "Advantages and limitations of active phase silanization in PVDF composites: Focus on electrical properties and energy harvesting potential" in Polymer Composites, 45, no. 5 (2024):4428-4446,
https://doi.org/10.1002/pc.28071 . .

TY  - JOUR
AU  - Vijatović Petrović, Mirjana
AU  - Cordero, F.
AU  - Mercadelli, E.
AU  - Brunengo, E.
AU  - Ilić, Nikola
AU  - Galassi, C.
AU  - Despotović, Z.
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - Stagnaro, P.
AU  - Canu, G.
AU  - Craciun, F.
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1465
AB  - The idea of this work is finding the way to efficiently and safely use mechanical energy released in small quantities around us to power up small-scale electronic devices used in everyday life. To this purpose, flexible lead-free piezoelectric composite films were prepared by hot pressing. Different amounts (30, 35 and 40 vol%) of lead-free piezoelectric material bismuth sodium titanate-barium titanate were embedded in the matrix of polyvinylidene fluoride under carefully optimized conditions of temperature and pressure, obtaining flexible films with quite homogeneous distribution of piezo-active filler. ATR-FTIR analysis revealed that hot pressing the flexible films caused a transformation of electro-inactive PVDF alpha-phase into electro-active beta and gamma phases. Dielectric measurements showed an increase of the permittivity up to 80 with the active phase increasing. Anelastic measurements showed that the elastic modulus increases as well with the fraction of active ceramic phase. Lastly, obtained flexible polymer-composites demonstrated notable properties both for energy storage and energy harvesting application, showing up to 74% of energy storage efficiency and, from testing of the force impact, up to 9 V and similar to 80 mu W of output voltage and power.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage
VL  - 884
DO  - 10.1016/j.jallcom.2021.161071
ER  - 

@article{
author = "Vijatović Petrović, Mirjana and Cordero, F. and Mercadelli, E. and Brunengo, E. and Ilić, Nikola and Galassi, C. and Despotović, Z. and Bobić, Jelena and Džunuzović, Adis and Stagnaro, P. and Canu, G. and Craciun, F.",
year = "2021",
abstract = "The idea of this work is finding the way to efficiently and safely use mechanical energy released in small quantities around us to power up small-scale electronic devices used in everyday life. To this purpose, flexible lead-free piezoelectric composite films were prepared by hot pressing. Different amounts (30, 35 and 40 vol%) of lead-free piezoelectric material bismuth sodium titanate-barium titanate were embedded in the matrix of polyvinylidene fluoride under carefully optimized conditions of temperature and pressure, obtaining flexible films with quite homogeneous distribution of piezo-active filler. ATR-FTIR analysis revealed that hot pressing the flexible films caused a transformation of electro-inactive PVDF alpha-phase into electro-active beta and gamma phases. Dielectric measurements showed an increase of the permittivity up to 80 with the active phase increasing. Anelastic measurements showed that the elastic modulus increases as well with the fraction of active ceramic phase. Lastly, obtained flexible polymer-composites demonstrated notable properties both for energy storage and energy harvesting application, showing up to 74% of energy storage efficiency and, from testing of the force impact, up to 9 V and similar to 80 mu W of output voltage and power.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage",
volume = "884",
doi = "10.1016/j.jallcom.2021.161071"
}

Vijatović Petrović, M., Cordero, F., Mercadelli, E., Brunengo, E., Ilić, N., Galassi, C., Despotović, Z., Bobić, J., Džunuzović, A., Stagnaro, P., Canu, G.,& Craciun, F.. (2021). Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 884.
https://doi.org/10.1016/j.jallcom.2021.161071

Vijatović Petrović M, Cordero F, Mercadelli E, Brunengo E, Ilić N, Galassi C, Despotović Z, Bobić J, Džunuzović A, Stagnaro P, Canu G, Craciun F. Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage. in Journal of Alloys and Compounds. 2021;884.
doi:10.1016/j.jallcom.2021.161071 .

Vijatović Petrović, Mirjana, Cordero, F., Mercadelli, E., Brunengo, E., Ilić, Nikola, Galassi, C., Despotović, Z., Bobić, Jelena, Džunuzović, Adis, Stagnaro, P., Canu, G., Craciun, F., "Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage" in Journal of Alloys and Compounds, 884 (2021),
https://doi.org/10.1016/j.jallcom.2021.161071 . .