TY  - JOUR
AU  - Rusmirović, Jelena
AU  - Lukić, Vesna
AU  - Kovačević, Tihomir
AU  - Bogosavljević, Marica
AU  - Brzić, Saša
AU  - Marinković, Aleksandar
AU  - Stevanović, Tatjana
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4293
AB  - Presented study was aimed to investigate the influence of surface functionalization of the industrial kraft lignin (KL) on mechanical and thermal properties of high-performance and fireproof composites based on unsaturated polyester (UPe) resin. In order to improve flame retardant properties, surface of the KL was modified by phosphorylation method in two-step process. First, direct grafting of phosphorus chloride on KL phenolic hydroxyl groups was performed and phosphoric acid ester of KL was formed. In the second step, phosphor ester of KL was recovered by precipitation in cooled isopropyl alcohol and the final obtained product, phosphorylated industrial kraft lignin with methyl terminal groups (KLP) was obtained. KLP mass contents in UPe based composites varied from 0.5 wt.% to 5.0 wt.%. Structural characterization was done via Fourier Transform-Infrared Spectroscopy (FT-IR). The effects of KLP surface functionalization and KLP mass contents on the UPe tensile properties were studied. Tensile strength (σ), elongation (ε) and Young's modulus of elasticity (E) and Shore A (Sh A) hardness of the UPe/KLP composites were analyzed in relation to the structure of KLP modification. Tensile testing results showed an increase in σ of 31 % for UPe/KL sample with 1.0 wt.% KL particles compared to the bare UPe matrix. The origin and cause of fracture that occurred during uniaxial tensile testing were analyzed using stereo microscopy. The obtained composites were tested on fire retardant properties in accordance with the standard test method UL-94V, and composites with 5.0 wt.% loaded KLP achieved V-1 category.
AB  - U radu su prikazani rezultati ispitivanja mogućnosti primene fosfatnih estara kraft lignina kao usporivača gorivosti u polimernim kompozitnim materijalima baziranim na nezasićenim poliestеrskim smolama. Sinteza fosfatnih estara lignina (funkcionalizacija lignina) izvršena je direktnim graftovanjem fosforoksihlorida na slobodne polifenolne grupe iz lignina, i potom hidrolizom hloridnih grupa izopropil alkoholom. Maseni sadržaj čistog i funkcionalizovanog lignina u poliestеrskim smolama variran je od 0,5 mas. % do 5,0 mas. %. Strukturna karakterizacija funkcionalizovanog kraft lignina i kompozita izvršena je primenom FT-IR spektroskopije. Proučavan je uticaj funkcionalizacije i masenog udela kraft lignina na tvrdoću, zatezna i termička svojstva nezasićenih poliestеrskih smola. Rezultati ispitivanja jednoosnog istezanja pokazali su da je povećanje zatezne čvrstoće od 31 % postignuto ugradnjom 1,0 % nefunkcionalizovanih čestica kraft lignina. Mehanizam nastajanja loma prilikom jednoosnog istezanja analiziran je primeneom stereomikroskopije. Termička svojstva kompozita analizirana su prema standardnoj metodi UL-94 na osnovu koje je kompozit sa 5,0 mas. % funkcionalizovanog lignina svrstan u najvišu kategoriju termootpornih materijala, V-1, a da su zatezna svojstva i tvrdoća po Šoru (eng. Shore A) ostala zadovoljavajuća.
PB  - Military Technical Institute, Belgrade
T2  - Scientific Technical Review
T1  - Fireproof phosphorylated kraft lignin/polyester based composites: Green material for rocket propellant thermal protection systems
T1  - Vatrootporni kompoziti na bazi fosfatnih estara kraft lignina i poliesterske smole - ekološki prihvatljiv materijal za sisteme termičke zaštite raketnih goriva
EP  - 22
IS  - 1
SP  - 16
VL  - 69
DO  - 10.5937/str1901016R
ER  - 

@article{
author = "Rusmirović, Jelena and Lukić, Vesna and Kovačević, Tihomir and Bogosavljević, Marica and Brzić, Saša and Marinković, Aleksandar and Stevanović, Tatjana",
year = "2019",
abstract = "Presented study was aimed to investigate the influence of surface functionalization of the industrial kraft lignin (KL) on mechanical and thermal properties of high-performance and fireproof composites based on unsaturated polyester (UPe) resin. In order to improve flame retardant properties, surface of the KL was modified by phosphorylation method in two-step process. First, direct grafting of phosphorus chloride on KL phenolic hydroxyl groups was performed and phosphoric acid ester of KL was formed. In the second step, phosphor ester of KL was recovered by precipitation in cooled isopropyl alcohol and the final obtained product, phosphorylated industrial kraft lignin with methyl terminal groups (KLP) was obtained. KLP mass contents in UPe based composites varied from 0.5 wt.% to 5.0 wt.%. Structural characterization was done via Fourier Transform-Infrared Spectroscopy (FT-IR). The effects of KLP surface functionalization and KLP mass contents on the UPe tensile properties were studied. Tensile strength (σ), elongation (ε) and Young's modulus of elasticity (E) and Shore A (Sh A) hardness of the UPe/KLP composites were analyzed in relation to the structure of KLP modification. Tensile testing results showed an increase in σ of 31 % for UPe/KL sample with 1.0 wt.% KL particles compared to the bare UPe matrix. The origin and cause of fracture that occurred during uniaxial tensile testing were analyzed using stereo microscopy. The obtained composites were tested on fire retardant properties in accordance with the standard test method UL-94V, and composites with 5.0 wt.% loaded KLP achieved V-1 category., U radu su prikazani rezultati ispitivanja mogućnosti primene fosfatnih estara kraft lignina kao usporivača gorivosti u polimernim kompozitnim materijalima baziranim na nezasićenim poliestеrskim smolama. Sinteza fosfatnih estara lignina (funkcionalizacija lignina) izvršena je direktnim graftovanjem fosforoksihlorida na slobodne polifenolne grupe iz lignina, i potom hidrolizom hloridnih grupa izopropil alkoholom. Maseni sadržaj čistog i funkcionalizovanog lignina u poliestеrskim smolama variran je od 0,5 mas. % do 5,0 mas. %. Strukturna karakterizacija funkcionalizovanog kraft lignina i kompozita izvršena je primenom FT-IR spektroskopije. Proučavan je uticaj funkcionalizacije i masenog udela kraft lignina na tvrdoću, zatezna i termička svojstva nezasićenih poliestеrskih smola. Rezultati ispitivanja jednoosnog istezanja pokazali su da je povećanje zatezne čvrstoće od 31 % postignuto ugradnjom 1,0 % nefunkcionalizovanih čestica kraft lignina. Mehanizam nastajanja loma prilikom jednoosnog istezanja analiziran je primeneom stereomikroskopije. Termička svojstva kompozita analizirana su prema standardnoj metodi UL-94 na osnovu koje je kompozit sa 5,0 mas. % funkcionalizovanog lignina svrstan u najvišu kategoriju termootpornih materijala, V-1, a da su zatezna svojstva i tvrdoća po Šoru (eng. Shore A) ostala zadovoljavajuća.",
publisher = "Military Technical Institute, Belgrade",
journal = "Scientific Technical Review",
title = "Fireproof phosphorylated kraft lignin/polyester based composites: Green material for rocket propellant thermal protection systems, Vatrootporni kompoziti na bazi fosfatnih estara kraft lignina i poliesterske smole - ekološki prihvatljiv materijal za sisteme termičke zaštite raketnih goriva",
pages = "22-16",
number = "1",
volume = "69",
doi = "10.5937/str1901016R"
}

Rusmirović, J., Lukić, V., Kovačević, T., Bogosavljević, M., Brzić, S., Marinković, A.,& Stevanović, T.. (2019). Fireproof phosphorylated kraft lignin/polyester based composites: Green material for rocket propellant thermal protection systems. in Scientific Technical Review
Military Technical Institute, Belgrade., 69(1), 16-22.
https://doi.org/10.5937/str1901016R

Rusmirović J, Lukić V, Kovačević T, Bogosavljević M, Brzić S, Marinković A, Stevanović T. Fireproof phosphorylated kraft lignin/polyester based composites: Green material for rocket propellant thermal protection systems. in Scientific Technical Review. 2019;69(1):16-22.
doi:10.5937/str1901016R .

Rusmirović, Jelena, Lukić, Vesna, Kovačević, Tihomir, Bogosavljević, Marica, Brzić, Saša, Marinković, Aleksandar, Stevanović, Tatjana, "Fireproof phosphorylated kraft lignin/polyester based composites: Green material for rocket propellant thermal protection systems" in Scientific Technical Review, 69, no. 1 (2019):16-22,
https://doi.org/10.5937/str1901016R . .

TY  - JOUR
AU  - Eraković, Sanja
AU  - Janković, Ana
AU  - Tsui, Gary C. P.
AU  - Tang, C. Y.
AU  - Mišković-Stanković, Vesna
AU  - Stevanović, Tatjana
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2694
AB  - Hydroxyapatite (HAP) is the most suitable biocompatible material for bone implant coatings; its brittleness, however, is a major obstacle, and the reason why research focuses on creating composites with biopolymers. Organosolv lignin (Lig) is used for the production of composite coatings, and these composites were examined in this study. Titanium substrate is a key biomedical material due to its well-known properties, but infections of the implantation site still impose a serious threat. One approach to prevent infection is to improve antimicrobial properties of the coating material. Silver doped hydroxyapatite (Ag/HAP) and HAP coatings on titanium were obtained by an electrophoretic deposition method in order to control deposited coating mass and morphology by varying applied voltage and deposition time. The effect of lignin on microstructure, morphology and thermal behavior of biocomposite coatings was investigated. The results showed that higher lignin concentrations protect the HAP lattice during sintering, improving coating stability. The corrosion stability was evaluated in simulated body fluid (SBF) at 37 degrees C. Newly formed plate-shaped carbonate-HAP was detected, indicating enhanced bioactive performance. The antimicrobial efficiency of Ag/HAP/Lig was confirmed by its higher reduction of bacteria Staphylococcus aureus TL (S. aureus TL) than of HAP/Lig coating. Cytotoxicity assay revealed that both coatings can be classified as non-toxic against healthy immunocompetent peripheral blood mononuclear cells (PBMC).
PB  - MDPI, Basel
T2  - International Journal of Molecular Sciences
T1  - Novel Bioactive Antimicrobial Lignin Containing Coatings on Titanium Obtained by Electrophoretic Deposition
EP  - 12322
IS  - 7
SP  - 12294
VL  - 15
DO  - 10.3390/ijms150712294
ER  - 

@article{
author = "Eraković, Sanja and Janković, Ana and Tsui, Gary C. P. and Tang, C. Y. and Mišković-Stanković, Vesna and Stevanović, Tatjana",
year = "2014",
abstract = "Hydroxyapatite (HAP) is the most suitable biocompatible material for bone implant coatings; its brittleness, however, is a major obstacle, and the reason why research focuses on creating composites with biopolymers. Organosolv lignin (Lig) is used for the production of composite coatings, and these composites were examined in this study. Titanium substrate is a key biomedical material due to its well-known properties, but infections of the implantation site still impose a serious threat. One approach to prevent infection is to improve antimicrobial properties of the coating material. Silver doped hydroxyapatite (Ag/HAP) and HAP coatings on titanium were obtained by an electrophoretic deposition method in order to control deposited coating mass and morphology by varying applied voltage and deposition time. The effect of lignin on microstructure, morphology and thermal behavior of biocomposite coatings was investigated. The results showed that higher lignin concentrations protect the HAP lattice during sintering, improving coating stability. The corrosion stability was evaluated in simulated body fluid (SBF) at 37 degrees C. Newly formed plate-shaped carbonate-HAP was detected, indicating enhanced bioactive performance. The antimicrobial efficiency of Ag/HAP/Lig was confirmed by its higher reduction of bacteria Staphylococcus aureus TL (S. aureus TL) than of HAP/Lig coating. Cytotoxicity assay revealed that both coatings can be classified as non-toxic against healthy immunocompetent peripheral blood mononuclear cells (PBMC).",
publisher = "MDPI, Basel",
journal = "International Journal of Molecular Sciences",
title = "Novel Bioactive Antimicrobial Lignin Containing Coatings on Titanium Obtained by Electrophoretic Deposition",
pages = "12322-12294",
number = "7",
volume = "15",
doi = "10.3390/ijms150712294"
}

Eraković, S., Janković, A., Tsui, G. C. P., Tang, C. Y., Mišković-Stanković, V.,& Stevanović, T.. (2014). Novel Bioactive Antimicrobial Lignin Containing Coatings on Titanium Obtained by Electrophoretic Deposition. in International Journal of Molecular Sciences
MDPI, Basel., 15(7), 12294-12322.
https://doi.org/10.3390/ijms150712294

Eraković S, Janković A, Tsui GCP, Tang CY, Mišković-Stanković V, Stevanović T. Novel Bioactive Antimicrobial Lignin Containing Coatings on Titanium Obtained by Electrophoretic Deposition. in International Journal of Molecular Sciences. 2014;15(7):12294-12322.
doi:10.3390/ijms150712294 .

Eraković, Sanja, Janković, Ana, Tsui, Gary C. P., Tang, C. Y., Mišković-Stanković, Vesna, Stevanović, Tatjana, "Novel Bioactive Antimicrobial Lignin Containing Coatings on Titanium Obtained by Electrophoretic Deposition" in International Journal of Molecular Sciences, 15, no. 7 (2014):12294-12322,
https://doi.org/10.3390/ijms150712294 . .

TY  - JOUR
AU  - Eraković, Sanja
AU  - Janković, Ana
AU  - Veljović, Đorđe
AU  - Palcevskis, Eriks
AU  - Mitrić, Miodrag
AU  - Stevanović, Tatjana
AU  - Janaćković, Đorđe
AU  - Mišković-Stanković, Vesna
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2509
AB  - Hydroxyapatite is the most suitable biocompatible material for bone implant coatings. However, its brittleness is a major obstacle, and that is why, recently, research focused on creating composites with various biopolymers. In this study, hydroxyapatite coatings were modified with lignin in order to attain corrosion stability and surface porosity that enables osteogenesis. Incorporating silver, well known for its antimicrobial properties, seemed the best strategy for avoiding possible infections. The silver/hydroxyapatite (Ag/HAP) and silver/hydroxyapatite/lignin (Ag/HAP/Lig) coatings were cathaphoretically deposited on titanium from ethanol suspensions, sintered at 900 degrees C in Ar, and characterized by X-ray diffraction, scanning electron microscopy, field emission scanning electron microscopy, attenuated total reflection Fourier transform infrared, and X-ray photoelectron spectroscopy. The corrosion stability of electrodeposited coatings was evaluated in vitro in Kokubo's simulated body fluid (SBF) at 37 degrees C using electrochemical impedance spectroscopy. Bioactivity was estimated by immersion in SBF to evaluate the formation of hydroxyapatite on the coating surface. A microcrystalline structure of newly formed plate-shaped carbonate-hydroxyapatite was detected after only 7 days, indicating enhanced bioactive behavior. Both coatings had good corrosion stability during a prolonged immersion time. Among the two, the Ag/HAP/Lig coating had a homogeneous surface, less roughness, and low values of contact angle.
PB  - Amer Chemical Soc, Washington
T2  - Journal of Physical Chemistry B
T1  - Corrosion Stability and Bioactivity in Simulated Body Fluid of Silver/Hydroxyapatite and Silver/Hydroxyapatite/Lignin Coatings on Titanium Obtained by Electrophoretic Deposition
EP  - 1643
IS  - 6
SP  - 1633
VL  - 117
DO  - 10.1021/jp305252a
ER  - 

@article{
author = "Eraković, Sanja and Janković, Ana and Veljović, Đorđe and Palcevskis, Eriks and Mitrić, Miodrag and Stevanović, Tatjana and Janaćković, Đorđe and Mišković-Stanković, Vesna",
year = "2013",
abstract = "Hydroxyapatite is the most suitable biocompatible material for bone implant coatings. However, its brittleness is a major obstacle, and that is why, recently, research focused on creating composites with various biopolymers. In this study, hydroxyapatite coatings were modified with lignin in order to attain corrosion stability and surface porosity that enables osteogenesis. Incorporating silver, well known for its antimicrobial properties, seemed the best strategy for avoiding possible infections. The silver/hydroxyapatite (Ag/HAP) and silver/hydroxyapatite/lignin (Ag/HAP/Lig) coatings were cathaphoretically deposited on titanium from ethanol suspensions, sintered at 900 degrees C in Ar, and characterized by X-ray diffraction, scanning electron microscopy, field emission scanning electron microscopy, attenuated total reflection Fourier transform infrared, and X-ray photoelectron spectroscopy. The corrosion stability of electrodeposited coatings was evaluated in vitro in Kokubo's simulated body fluid (SBF) at 37 degrees C using electrochemical impedance spectroscopy. Bioactivity was estimated by immersion in SBF to evaluate the formation of hydroxyapatite on the coating surface. A microcrystalline structure of newly formed plate-shaped carbonate-hydroxyapatite was detected after only 7 days, indicating enhanced bioactive behavior. Both coatings had good corrosion stability during a prolonged immersion time. Among the two, the Ag/HAP/Lig coating had a homogeneous surface, less roughness, and low values of contact angle.",
publisher = "Amer Chemical Soc, Washington",
journal = "Journal of Physical Chemistry B",
title = "Corrosion Stability and Bioactivity in Simulated Body Fluid of Silver/Hydroxyapatite and Silver/Hydroxyapatite/Lignin Coatings on Titanium Obtained by Electrophoretic Deposition",
pages = "1643-1633",
number = "6",
volume = "117",
doi = "10.1021/jp305252a"
}

Eraković, S., Janković, A., Veljović, Đ., Palcevskis, E., Mitrić, M., Stevanović, T., Janaćković, Đ.,& Mišković-Stanković, V.. (2013). Corrosion Stability and Bioactivity in Simulated Body Fluid of Silver/Hydroxyapatite and Silver/Hydroxyapatite/Lignin Coatings on Titanium Obtained by Electrophoretic Deposition. in Journal of Physical Chemistry B
Amer Chemical Soc, Washington., 117(6), 1633-1643.
https://doi.org/10.1021/jp305252a

Eraković S, Janković A, Veljović Đ, Palcevskis E, Mitrić M, Stevanović T, Janaćković Đ, Mišković-Stanković V. Corrosion Stability and Bioactivity in Simulated Body Fluid of Silver/Hydroxyapatite and Silver/Hydroxyapatite/Lignin Coatings on Titanium Obtained by Electrophoretic Deposition. in Journal of Physical Chemistry B. 2013;117(6):1633-1643.
doi:10.1021/jp305252a .

Eraković, Sanja, Janković, Ana, Veljović, Đorđe, Palcevskis, Eriks, Mitrić, Miodrag, Stevanović, Tatjana, Janaćković, Đorđe, Mišković-Stanković, Vesna, "Corrosion Stability and Bioactivity in Simulated Body Fluid of Silver/Hydroxyapatite and Silver/Hydroxyapatite/Lignin Coatings on Titanium Obtained by Electrophoretic Deposition" in Journal of Physical Chemistry B, 117, no. 6 (2013):1633-1643,
https://doi.org/10.1021/jp305252a . .

TY  - JOUR
AU  - Eraković, Sanja
AU  - Janković, Ana
AU  - Matić, Ivana Z.
AU  - Juranić, Zorica D.
AU  - Vukašinović-Sekulić, Maja
AU  - Stevanović, Tatjana
AU  - Mišković-Stanković, Vesna
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2447
AB  - Silver doped hydroxyapatite (HAP) [Ca9.95Ag0.05(PO4)(6)(OH)(2)] composite coatings with natural polymer organosolv lignin (Lig) were produced by electrophoretic deposition (EPD) on titanium. Coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The corrosion stability of electrodeposited coatings was evaluated in vitro in Kokubo's simulated body fluid (SBF) at 37 degrees C using electrochemical impedance spectroscopy (EIS). Antimicrobial properties are directly proportional to the rate of silver ions release from the coatings, determined from inductively coupled plasma spectrometry (ICP-AES). The obtained results are in good agreement with viability of pathogenic bacteria strain Staphylococcus aureus TL in suspension, which had completely disappeared after 24 h. Composite Ag/HAP/Lig coatings were confirmed as non-toxic for healthy immunocompetent peripheral blood mononuclear cells (PBMC).
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Investigation of silver impact on hydroxyapatite/lignin coatings electrodeposited on titanium
EP  - 530
IS  - 2-3
SP  - 521
VL  - 142
DO  - 10.1016/j.matchemphys.2013.07.047
ER  - 

@article{
author = "Eraković, Sanja and Janković, Ana and Matić, Ivana Z. and Juranić, Zorica D. and Vukašinović-Sekulić, Maja and Stevanović, Tatjana and Mišković-Stanković, Vesna",
year = "2013",
abstract = "Silver doped hydroxyapatite (HAP) [Ca9.95Ag0.05(PO4)(6)(OH)(2)] composite coatings with natural polymer organosolv lignin (Lig) were produced by electrophoretic deposition (EPD) on titanium. Coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The corrosion stability of electrodeposited coatings was evaluated in vitro in Kokubo's simulated body fluid (SBF) at 37 degrees C using electrochemical impedance spectroscopy (EIS). Antimicrobial properties are directly proportional to the rate of silver ions release from the coatings, determined from inductively coupled plasma spectrometry (ICP-AES). The obtained results are in good agreement with viability of pathogenic bacteria strain Staphylococcus aureus TL in suspension, which had completely disappeared after 24 h. Composite Ag/HAP/Lig coatings were confirmed as non-toxic for healthy immunocompetent peripheral blood mononuclear cells (PBMC).",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Investigation of silver impact on hydroxyapatite/lignin coatings electrodeposited on titanium",
pages = "530-521",
number = "2-3",
volume = "142",
doi = "10.1016/j.matchemphys.2013.07.047"
}

Eraković, S., Janković, A., Matić, I. Z., Juranić, Z. D., Vukašinović-Sekulić, M., Stevanović, T.,& Mišković-Stanković, V.. (2013). Investigation of silver impact on hydroxyapatite/lignin coatings electrodeposited on titanium. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 142(2-3), 521-530.
https://doi.org/10.1016/j.matchemphys.2013.07.047

Eraković S, Janković A, Matić IZ, Juranić ZD, Vukašinović-Sekulić M, Stevanović T, Mišković-Stanković V. Investigation of silver impact on hydroxyapatite/lignin coatings electrodeposited on titanium. in Materials Chemistry and Physics. 2013;142(2-3):521-530.
doi:10.1016/j.matchemphys.2013.07.047 .

Eraković, Sanja, Janković, Ana, Matić, Ivana Z., Juranić, Zorica D., Vukašinović-Sekulić, Maja, Stevanović, Tatjana, Mišković-Stanković, Vesna, "Investigation of silver impact on hydroxyapatite/lignin coatings electrodeposited on titanium" in Materials Chemistry and Physics, 142, no. 2-3 (2013):521-530,
https://doi.org/10.1016/j.matchemphys.2013.07.047 . .

TY  - JOUR
AU  - Janković, Ana
AU  - Eraković, Sanja
AU  - Dindune, Antonija
AU  - Veljović, Đorđe
AU  - Stevanović, Tatjana
AU  - Janaćković, Đorđe
AU  - Mišković-Stanković, Vesna
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2080
AB  - Titanium is a key biomedical material due to its good biocompatibility, mechanical properties and corrosion stability, but infections at the implantation site still pose a serious threat. One approach to prevent infection is to improve the antimicrobial ability of the coating material. Silver-doped hydroxyapatite (Ag/HAP) nanoparticles were synthesized by a new modified precipitation method. The synthesized powder was used for the preparation of Ag/HAP coating on titanium by electrophoretic deposition. The coating was characterized in terms of phase composition and structure by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD); the surface morphology and chemical composition was assessed using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The research focused on an evaluation of the corrosion behaviour of Ag/HAP coating in simulated body fluid (SBF) at 37°C during prolonged immersion time by electrochemical impedance spectroscopy (EIS). The silver-doped HAP coating provided good corrosion protection in SBF solution.
AB  - Titan predstavlja ključni biomedicinski materijal zahvaljujući svojoj dobroj biokompatibilnosti, mehaničkim svojstvima i korozionoj stabilnosti, ali infekcije na mestu implantiranja i dalje predstavljaju ozbiljan problem. Jedan način da se predupredi infekcija je da se poboljša antimikrobna aktivnost materijala. Srebrom dopirane nanočestice hidroksiapatita sintetisane su novom modifikovanom precipitacionom metodom. Ovako sintetisani prah je korišćen za nanošenje prevlake srebro/hidroksiapatit na titan elektoforetskim taloženjem. Fazni sastav i struktura prevlake su karakterisani spektroskopijom infracrvene svetlosti sa Furijeovom transformacijom u modu totalne refleksije i difrakcijom X-zraka. Morfologija površine i hemijski sastav ispitivani su korišćenjem skenirajuće elektronske mikroskopije i energetske disperzione spektroskopije. Cilj istraživanja je ispitivanje korozione stabilnosti prevlake srebro/hidroksiapatit u simuliranoj telesnoj tečnosti koristeći spektroskopiju elektrohemijske impedancije. Prevlaka srebro/hidroksi-apatit obezbeđuje dobru zaštitu od korozije u simuliranoj telesnoj tečnosti.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical impedance spectroscopy of a silver-doped hydroxyapatite coating in simulated body fluid used as a corrosive agent
T1  - Spektroskopija elektrohemijske impedancije prevlake hidroksiapatita dopirane srebrom u simuliranoj telesnoj tečnosti korišćenoj kao korozioni agens
EP  - 1623
IS  - 11
SP  - 1609
VL  - 77
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2080
ER  - 

@article{
author = "Janković, Ana and Eraković, Sanja and Dindune, Antonija and Veljović, Đorđe and Stevanović, Tatjana and Janaćković, Đorđe and Mišković-Stanković, Vesna",
year = "2012",
abstract = "Titanium is a key biomedical material due to its good biocompatibility, mechanical properties and corrosion stability, but infections at the implantation site still pose a serious threat. One approach to prevent infection is to improve the antimicrobial ability of the coating material. Silver-doped hydroxyapatite (Ag/HAP) nanoparticles were synthesized by a new modified precipitation method. The synthesized powder was used for the preparation of Ag/HAP coating on titanium by electrophoretic deposition. The coating was characterized in terms of phase composition and structure by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD); the surface morphology and chemical composition was assessed using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The research focused on an evaluation of the corrosion behaviour of Ag/HAP coating in simulated body fluid (SBF) at 37°C during prolonged immersion time by electrochemical impedance spectroscopy (EIS). The silver-doped HAP coating provided good corrosion protection in SBF solution., Titan predstavlja ključni biomedicinski materijal zahvaljujući svojoj dobroj biokompatibilnosti, mehaničkim svojstvima i korozionoj stabilnosti, ali infekcije na mestu implantiranja i dalje predstavljaju ozbiljan problem. Jedan način da se predupredi infekcija je da se poboljša antimikrobna aktivnost materijala. Srebrom dopirane nanočestice hidroksiapatita sintetisane su novom modifikovanom precipitacionom metodom. Ovako sintetisani prah je korišćen za nanošenje prevlake srebro/hidroksiapatit na titan elektoforetskim taloženjem. Fazni sastav i struktura prevlake su karakterisani spektroskopijom infracrvene svetlosti sa Furijeovom transformacijom u modu totalne refleksije i difrakcijom X-zraka. Morfologija površine i hemijski sastav ispitivani su korišćenjem skenirajuće elektronske mikroskopije i energetske disperzione spektroskopije. Cilj istraživanja je ispitivanje korozione stabilnosti prevlake srebro/hidroksiapatit u simuliranoj telesnoj tečnosti koristeći spektroskopiju elektrohemijske impedancije. Prevlaka srebro/hidroksi-apatit obezbeđuje dobru zaštitu od korozije u simuliranoj telesnoj tečnosti.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical impedance spectroscopy of a silver-doped hydroxyapatite coating in simulated body fluid used as a corrosive agent, Spektroskopija elektrohemijske impedancije prevlake hidroksiapatita dopirane srebrom u simuliranoj telesnoj tečnosti korišćenoj kao korozioni agens",
pages = "1623-1609",
number = "11",
volume = "77",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2080"
}

Janković, A., Eraković, S., Dindune, A., Veljović, Đ., Stevanović, T., Janaćković, Đ.,& Mišković-Stanković, V.. (2012). Electrochemical impedance spectroscopy of a silver-doped hydroxyapatite coating in simulated body fluid used as a corrosive agent. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 77(11), 1609-1623.
https://hdl.handle.net/21.15107/rcub_technorep_2080

Janković A, Eraković S, Dindune A, Veljović Đ, Stevanović T, Janaćković Đ, Mišković-Stanković V. Electrochemical impedance spectroscopy of a silver-doped hydroxyapatite coating in simulated body fluid used as a corrosive agent. in Journal of the Serbian Chemical Society. 2012;77(11):1609-1623.
https://hdl.handle.net/21.15107/rcub_technorep_2080 .

Janković, Ana, Eraković, Sanja, Dindune, Antonija, Veljović, Đorđe, Stevanović, Tatjana, Janaćković, Đorđe, Mišković-Stanković, Vesna, "Electrochemical impedance spectroscopy of a silver-doped hydroxyapatite coating in simulated body fluid used as a corrosive agent" in Journal of the Serbian Chemical Society, 77, no. 11 (2012):1609-1623,
https://hdl.handle.net/21.15107/rcub_technorep_2080 .

TY  - JOUR
AU  - Eraković, Sanja
AU  - Veljović, Đorđe
AU  - Diouf, Papa Niokhor
AU  - Stevanović, Tatjana
AU  - Mitrić, Miodrag
AU  - Janaćković, Đorđe
AU  - Matić, Ivana Z.
AU  - Juranić, Zorica D.
AU  - Mišković-Stanković, Vesna
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2181
AB  - Composite coatings based on lignin, obtained by electrophoretic deposition (EPD) on titanium, were investigated. The aim of this work was to produce hydroxyapatite/lignin (HAP/Lig) coatings on titanium and to investigate the effect of the lignin concentration on microstructure, morphology, phase composition, thermal behavior and cytotoxicity of the HAP/Lig coatings. An organosolv lignin was used for the production of the composite coatings studied in this research. The properties of HAP/Lig coatings were characterized using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FT-IR) and X-ray photoelectron spectroscopy (XPS), as well as the MTT test of cytotoxicity. The results showed that higher lignin concentrations protected the HAP lattice during sintering, thereby improving the stability of the HAP/Lig coatings. The cell survival of peripheral blood mononuclear cells (PBMC) after proliferation indicates that the HAP/Lig coating with 1 wt% Lig electrodeposited on titanium was non-toxic with significant promise as a potential bone-repair material.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - The effect of lignin on the structure and characteristics of composite coatings electrodeposited on titanium
EP  - 283
IS  - 4
SP  - 275
VL  - 75
DO  - 10.1016/j.porgcoat.2012.07.005
ER  - 

@article{
author = "Eraković, Sanja and Veljović, Đorđe and Diouf, Papa Niokhor and Stevanović, Tatjana and Mitrić, Miodrag and Janaćković, Đorđe and Matić, Ivana Z. and Juranić, Zorica D. and Mišković-Stanković, Vesna",
year = "2012",
abstract = "Composite coatings based on lignin, obtained by electrophoretic deposition (EPD) on titanium, were investigated. The aim of this work was to produce hydroxyapatite/lignin (HAP/Lig) coatings on titanium and to investigate the effect of the lignin concentration on microstructure, morphology, phase composition, thermal behavior and cytotoxicity of the HAP/Lig coatings. An organosolv lignin was used for the production of the composite coatings studied in this research. The properties of HAP/Lig coatings were characterized using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FT-IR) and X-ray photoelectron spectroscopy (XPS), as well as the MTT test of cytotoxicity. The results showed that higher lignin concentrations protected the HAP lattice during sintering, thereby improving the stability of the HAP/Lig coatings. The cell survival of peripheral blood mononuclear cells (PBMC) after proliferation indicates that the HAP/Lig coating with 1 wt% Lig electrodeposited on titanium was non-toxic with significant promise as a potential bone-repair material.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "The effect of lignin on the structure and characteristics of composite coatings electrodeposited on titanium",
pages = "283-275",
number = "4",
volume = "75",
doi = "10.1016/j.porgcoat.2012.07.005"
}

Eraković, S., Veljović, Đ., Diouf, P. N., Stevanović, T., Mitrić, M., Janaćković, Đ., Matić, I. Z., Juranić, Z. D.,& Mišković-Stanković, V.. (2012). The effect of lignin on the structure and characteristics of composite coatings electrodeposited on titanium. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 75(4), 275-283.
https://doi.org/10.1016/j.porgcoat.2012.07.005

Eraković S, Veljović Đ, Diouf PN, Stevanović T, Mitrić M, Janaćković Đ, Matić IZ, Juranić ZD, Mišković-Stanković V. The effect of lignin on the structure and characteristics of composite coatings electrodeposited on titanium. in Progress in Organic Coatings. 2012;75(4):275-283.
doi:10.1016/j.porgcoat.2012.07.005 .

Eraković, Sanja, Veljović, Đorđe, Diouf, Papa Niokhor, Stevanović, Tatjana, Mitrić, Miodrag, Janaćković, Đorđe, Matić, Ivana Z., Juranić, Zorica D., Mišković-Stanković, Vesna, "The effect of lignin on the structure and characteristics of composite coatings electrodeposited on titanium" in Progress in Organic Coatings, 75, no. 4 (2012):275-283,
https://doi.org/10.1016/j.porgcoat.2012.07.005 . .

TY  - JOUR
AU  - Eraković, Sanja
AU  - Veljović, Đorđe
AU  - Diouf, Papa Niokhor
AU  - Stevanović, Tatjana
AU  - Mitrić, Miodrag
AU  - Milonjić, Slobodan K.
AU  - Mišković-Stanković, Vesna
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1464
AB  - In this work, electrophoretic deposition (EPD) was applied to obtain novel hydroxyapatite (HAP)/lignin (Lig) biocomposite coatings on titanium substrate. Nanosized hydroxyapatite powder, prepared by using the modified chemical precipitation method, was used for the fabrication of HAP/Lig composite coatings. EPD was performed at different values of constant voltage and constant deposition time. It was confirmed that control over deposited mass can be achieved by applied voltage and time. The uniform and compact coatings were successfully deposited at applied voltage of 60 V in various deposition times lower than 1 minute. The effect of lignin as natural non-toxic polymer on microstructure, morphology and thermal behavior of biocomposite HAP/Lig coatings was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The electrophoretically deposited HAP/Lig coating has been successfully sintered at lower sintering temperature of 900 degrees C, producing non-fractured coating and indicating that lignin may exhibit adhesive role, strengthening the bonding between HAP particles and substrate surface.
PB  - Walter de Gruyter Gmbh, Berlin
T2  - International Journal of Chemical Reactor Engineering
T1  - Electrophoretic Deposition of Biocomposite Lignin/Hydroxyapatite Coatings on Titanium
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_vinar_3837
ER  - 

@article{
author = "Eraković, Sanja and Veljović, Đorđe and Diouf, Papa Niokhor and Stevanović, Tatjana and Mitrić, Miodrag and Milonjić, Slobodan K. and Mišković-Stanković, Vesna",
year = "2009",
abstract = "In this work, electrophoretic deposition (EPD) was applied to obtain novel hydroxyapatite (HAP)/lignin (Lig) biocomposite coatings on titanium substrate. Nanosized hydroxyapatite powder, prepared by using the modified chemical precipitation method, was used for the fabrication of HAP/Lig composite coatings. EPD was performed at different values of constant voltage and constant deposition time. It was confirmed that control over deposited mass can be achieved by applied voltage and time. The uniform and compact coatings were successfully deposited at applied voltage of 60 V in various deposition times lower than 1 minute. The effect of lignin as natural non-toxic polymer on microstructure, morphology and thermal behavior of biocomposite HAP/Lig coatings was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The electrophoretically deposited HAP/Lig coating has been successfully sintered at lower sintering temperature of 900 degrees C, producing non-fractured coating and indicating that lignin may exhibit adhesive role, strengthening the bonding between HAP particles and substrate surface.",
publisher = "Walter de Gruyter Gmbh, Berlin",
journal = "International Journal of Chemical Reactor Engineering",
title = "Electrophoretic Deposition of Biocomposite Lignin/Hydroxyapatite Coatings on Titanium",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_vinar_3837"
}

Eraković, S., Veljović, Đ., Diouf, P. N., Stevanović, T., Mitrić, M., Milonjić, S. K.,& Mišković-Stanković, V.. (2009). Electrophoretic Deposition of Biocomposite Lignin/Hydroxyapatite Coatings on Titanium. in International Journal of Chemical Reactor Engineering
Walter de Gruyter Gmbh, Berlin., 7.
https://hdl.handle.net/21.15107/rcub_vinar_3837

Eraković S, Veljović Đ, Diouf PN, Stevanović T, Mitrić M, Milonjić SK, Mišković-Stanković V. Electrophoretic Deposition of Biocomposite Lignin/Hydroxyapatite Coatings on Titanium. in International Journal of Chemical Reactor Engineering. 2009;7.
https://hdl.handle.net/21.15107/rcub_vinar_3837 .

Eraković, Sanja, Veljović, Đorđe, Diouf, Papa Niokhor, Stevanović, Tatjana, Mitrić, Miodrag, Milonjić, Slobodan K., Mišković-Stanković, Vesna, "Electrophoretic Deposition of Biocomposite Lignin/Hydroxyapatite Coatings on Titanium" in International Journal of Chemical Reactor Engineering, 7 (2009),
https://hdl.handle.net/21.15107/rcub_vinar_3837 .