TY  - JOUR
AU  - Hosakun, Yanin
AU  - Halasz, Katalin
AU  - Horvath, Miklos
AU  - Csoka, Levente
AU  - Đoković, Vladimir
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1651
AB  - Bacterial cellulose (BC) was used as an active material for fabrication of the membrane for CO2 capture. The BC-membrane is further modified with silk fibroin protein and ZnO nanoparticles in order to increase the number of sites that may bind CO2. The interaction of the CO2 with the membranes was investigated by means of ATR-FTIR spectroscopy. The argon purged membranes were used as the control samples. After pressurizing the membranes in CO2 at 3 bar, FTIR spectra were recorded and compared to the spectra of the controls. The interaction of the membrane materials with CO2 were studied by examining two regions of the spectra: 740-610 cm (1) (bending vibrations of CO2) and 2400- 2320 cm (1) (asymmetric stretching vibrations of CO2). The envelope of the bending mode peak in 740-610 cm (1) region is resolved into particular peaks and the appearance of the additional line at 654 cm (1) suggested that the absorption bands of CO2 alters because of the Lewis acid- base type of interaction with membranes. The changes in the region of asymmetric stretching vibrations of CO2 were even more pronounced after pressurization. The presence of the number of different sites (active groups) for the CO2 adsorption reflected in the appearance of several additional asymmetric stretching peaks. Also, due to the entrapment of the CO2 in the membrane, a typical C=O asymmetric stretching vibration line at similar to 2340 cm (1) is shifted towards lower frequencies. The analysis of the results suggested that there is a strong interaction of CO2 with BC membrane, which is additionally improved by its modification with silk fibroin and ZnO nanoparticles. From the results of CO2 permeation experiment, the basic BC membrane, silk fibroin- modified BC membrane and ZnO nanoparticles- modified BC membrane exhibited the CO2 permeability of 2.73, 2.69 and 2.66 Barrer, respectively. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes
VL  - 324
SP  - 83
EP  - 92
DO  - 10.1016/j.cej.2017.05.029
ER  - 

@article{
author = "Hosakun, Yanin and Halasz, Katalin and Horvath, Miklos and Csoka, Levente and Đoković, Vladimir",
year = "2017",
abstract = "Bacterial cellulose (BC) was used as an active material for fabrication of the membrane for CO2 capture. The BC-membrane is further modified with silk fibroin protein and ZnO nanoparticles in order to increase the number of sites that may bind CO2. The interaction of the CO2 with the membranes was investigated by means of ATR-FTIR spectroscopy. The argon purged membranes were used as the control samples. After pressurizing the membranes in CO2 at 3 bar, FTIR spectra were recorded and compared to the spectra of the controls. The interaction of the membrane materials with CO2 were studied by examining two regions of the spectra: 740-610 cm (1) (bending vibrations of CO2) and 2400- 2320 cm (1) (asymmetric stretching vibrations of CO2). The envelope of the bending mode peak in 740-610 cm (1) region is resolved into particular peaks and the appearance of the additional line at 654 cm (1) suggested that the absorption bands of CO2 alters because of the Lewis acid- base type of interaction with membranes. The changes in the region of asymmetric stretching vibrations of CO2 were even more pronounced after pressurization. The presence of the number of different sites (active groups) for the CO2 adsorption reflected in the appearance of several additional asymmetric stretching peaks. Also, due to the entrapment of the CO2 in the membrane, a typical C=O asymmetric stretching vibration line at similar to 2340 cm (1) is shifted towards lower frequencies. The analysis of the results suggested that there is a strong interaction of CO2 with BC membrane, which is additionally improved by its modification with silk fibroin and ZnO nanoparticles. From the results of CO2 permeation experiment, the basic BC membrane, silk fibroin- modified BC membrane and ZnO nanoparticles- modified BC membrane exhibited the CO2 permeability of 2.73, 2.69 and 2.66 Barrer, respectively. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes",
volume = "324",
pages = "83-92",
doi = "10.1016/j.cej.2017.05.029"
}

Hosakun, Y., Halasz, K., Horvath, M., Csoka, L.,& Đoković, V.. (2017). ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes. in Chemical Engineering Journal, 324, 83-92.
https://doi.org/10.1016/j.cej.2017.05.029

Hosakun Y, Halasz K, Horvath M, Csoka L, Đoković V. ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes. in Chemical Engineering Journal. 2017;324:83-92.
doi:10.1016/j.cej.2017.05.029 .

Hosakun, Yanin, Halasz, Katalin, Horvath, Miklos, Csoka, Levente, Đoković, Vladimir, "ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes" in Chemical Engineering Journal, 324 (2017):83-92,
https://doi.org/10.1016/j.cej.2017.05.029 . .

TY  - JOUR
AU  - Khatri, Vinay
AU  - Halasz, Katalin
AU  - Trandafilović, Lidija V.
AU  - Dimitrijević-Branković, Suzana I.
AU  - Mohanty, Paritosh
AU  - Đoković, Vladimir
AU  - Csoka, Levente
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6019
AB  - Cellulose fiber sheets impregnated with saccharide capped-ZnO nanoparticles were used as bioactive materials for antibody immobilization. First, ZnO nanoparticles were synthesized in the presence of glucose (monosaccharide), sucrose (disaccharide) as well as alginic acid and starch (polysaccharides). The pine cellulose fibers were then modified by the obtained saccharide capped nanoparticles and further incorporated into the sheets. The presence of ZnO significantly improved the immobilization of the antibodies on the surface of the sheets. After rewetting the alginic acid-ZnO modified sheets with saline solution, the retention of antibodies was about 95%. A high degree of the immobilization of biomolecules is an important feature for possible fabrications of bioactive- or biosensing-papers and we successfully tested the sheets on the detection of blood types using (A, B, and D blood antibodies). The ZnO nanopartides affected also the other properties of the sheets. The ZnO-modified fiber sheets showed higher values of tensile index (strength), smoothness and opacity, while the value of porosity was substantially lower than that of the unmodified sheet. The presence of ZnO nanoparticles provided also the antimicrobial activity to the sheets. They showed a strong activity against bacteria (Escherichia coli and Staphylococcus aureus) and strong resistance to the attack of cellulase producing fungus Gloeophyllum trabeum. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Carbohydrate Polymers
T1  - ZnO-modified cellulose fiber sheets for antibody immobilization
VL  - 109
SP  - 139
EP  - 147
DO  - 10.1016/j.carbpol.2014.03.061
ER  - 

@article{
author = "Khatri, Vinay and Halasz, Katalin and Trandafilović, Lidija V. and Dimitrijević-Branković, Suzana I. and Mohanty, Paritosh and Đoković, Vladimir and Csoka, Levente",
year = "2014",
abstract = "Cellulose fiber sheets impregnated with saccharide capped-ZnO nanoparticles were used as bioactive materials for antibody immobilization. First, ZnO nanoparticles were synthesized in the presence of glucose (monosaccharide), sucrose (disaccharide) as well as alginic acid and starch (polysaccharides). The pine cellulose fibers were then modified by the obtained saccharide capped nanoparticles and further incorporated into the sheets. The presence of ZnO significantly improved the immobilization of the antibodies on the surface of the sheets. After rewetting the alginic acid-ZnO modified sheets with saline solution, the retention of antibodies was about 95%. A high degree of the immobilization of biomolecules is an important feature for possible fabrications of bioactive- or biosensing-papers and we successfully tested the sheets on the detection of blood types using (A, B, and D blood antibodies). The ZnO nanopartides affected also the other properties of the sheets. The ZnO-modified fiber sheets showed higher values of tensile index (strength), smoothness and opacity, while the value of porosity was substantially lower than that of the unmodified sheet. The presence of ZnO nanoparticles provided also the antimicrobial activity to the sheets. They showed a strong activity against bacteria (Escherichia coli and Staphylococcus aureus) and strong resistance to the attack of cellulase producing fungus Gloeophyllum trabeum. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Carbohydrate Polymers",
title = "ZnO-modified cellulose fiber sheets for antibody immobilization",
volume = "109",
pages = "139-147",
doi = "10.1016/j.carbpol.2014.03.061"
}

Khatri, V., Halasz, K., Trandafilović, L. V., Dimitrijević-Branković, S. I., Mohanty, P., Đoković, V.,& Csoka, L.. (2014). ZnO-modified cellulose fiber sheets for antibody immobilization. in Carbohydrate Polymers, 109, 139-147.
https://doi.org/10.1016/j.carbpol.2014.03.061

Khatri V, Halasz K, Trandafilović LV, Dimitrijević-Branković SI, Mohanty P, Đoković V, Csoka L. ZnO-modified cellulose fiber sheets for antibody immobilization. in Carbohydrate Polymers. 2014;109:139-147.
doi:10.1016/j.carbpol.2014.03.061 .

Khatri, Vinay, Halasz, Katalin, Trandafilović, Lidija V., Dimitrijević-Branković, Suzana I., Mohanty, Paritosh, Đoković, Vladimir, Csoka, Levente, "ZnO-modified cellulose fiber sheets for antibody immobilization" in Carbohydrate Polymers, 109 (2014):139-147,
https://doi.org/10.1016/j.carbpol.2014.03.061 . .