TY  - JOUR
AU  - Marković, Darka
AU  - Milovanović, Stoja
AU  - De Clerck, Karen
AU  - Žižović, Irena
AU  - Stojanović, Dušica
AU  - Radetić, Maja
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3889
AB  - This study discusses the potential of high pressure (supercritical and liquid) CO2 impregnation to load electrospun polyamide nanofibers with thymol as an antimicrobial agent. The influence of selected pressures and temperatures on the thymol impregnation yield has been evaluated. High pressure impregnation provided superior thymol impregnation yields (up to similar to 60%) on nanofibers compared to conventional immersion methods (similar to 2%). The presence of thymol in impregnated samples was confirmed by FT-IR analysis. FESEM analysis revealed that impregnation with thymol resulted in a swelling of the nanofibers. The nanofiber morphological changes strongly depended on the thymol impregnation yield. Nanofibers impregnated with thymol using high pressure CO2 ensured excellent antimicrobial activity against Gram-negative bacterium E. coli, Gram-positive bacterium S. aureus and fungus C. albicans. In addition, the Higuchi release model well fitted the thymol release studies.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of CO2 Utilization
T1  - Development of material with strong antimicrobial activity by high pressure CO2 impregnation of polyamide nanofibers with thymol
EP  - 27
SP  - 19
VL  - 26
DO  - 10.1016/j.jcou.2018.04.019
ER  - 

@article{
author = "Marković, Darka and Milovanović, Stoja and De Clerck, Karen and Žižović, Irena and Stojanović, Dušica and Radetić, Maja",
year = "2018",
abstract = "This study discusses the potential of high pressure (supercritical and liquid) CO2 impregnation to load electrospun polyamide nanofibers with thymol as an antimicrobial agent. The influence of selected pressures and temperatures on the thymol impregnation yield has been evaluated. High pressure impregnation provided superior thymol impregnation yields (up to similar to 60%) on nanofibers compared to conventional immersion methods (similar to 2%). The presence of thymol in impregnated samples was confirmed by FT-IR analysis. FESEM analysis revealed that impregnation with thymol resulted in a swelling of the nanofibers. The nanofiber morphological changes strongly depended on the thymol impregnation yield. Nanofibers impregnated with thymol using high pressure CO2 ensured excellent antimicrobial activity against Gram-negative bacterium E. coli, Gram-positive bacterium S. aureus and fungus C. albicans. In addition, the Higuchi release model well fitted the thymol release studies.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of CO2 Utilization",
title = "Development of material with strong antimicrobial activity by high pressure CO2 impregnation of polyamide nanofibers with thymol",
pages = "27-19",
volume = "26",
doi = "10.1016/j.jcou.2018.04.019"
}

Marković, D., Milovanović, S., De Clerck, K., Žižović, I., Stojanović, D.,& Radetić, M.. (2018). Development of material with strong antimicrobial activity by high pressure CO2 impregnation of polyamide nanofibers with thymol. in Journal of CO2 Utilization
Elsevier Sci Ltd, Oxford., 26, 19-27.
https://doi.org/10.1016/j.jcou.2018.04.019

Marković D, Milovanović S, De Clerck K, Žižović I, Stojanović D, Radetić M. Development of material with strong antimicrobial activity by high pressure CO2 impregnation of polyamide nanofibers with thymol. in Journal of CO2 Utilization. 2018;26:19-27.
doi:10.1016/j.jcou.2018.04.019 .

Marković, Darka, Milovanović, Stoja, De Clerck, Karen, Žižović, Irena, Stojanović, Dušica, Radetić, Maja, "Development of material with strong antimicrobial activity by high pressure CO2 impregnation of polyamide nanofibers with thymol" in Journal of CO2 Utilization, 26 (2018):19-27,
https://doi.org/10.1016/j.jcou.2018.04.019 . .

TY  - JOUR
AU  - Daels, Nele
AU  - Radoičić, Marija B.
AU  - Radetić, Maja
AU  - De Clerck, Karen
AU  - Van Hulle, Stijn W. H.
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3118
AB  - This study presents contact experiments and filtration tests with nanofibre membranes containing TiO2 nanoparticles in view of effluent treatment. The first part of this study focuses on the removal of dissolved organic matter, more specifically humic acids. Removal of humic acids from secondary wastewater treatment plant effluent as well as from synthetic water solutions was tested. Also the bactericidal effect of the TiO2 functionalised nanofibre membranes was examined. Contact experiments with TiO2 functionalised membranes showed removal of humic acids (83% degradation after 2 h) and Staphylococcus aureus (4.5 log(10)/100 ml after 6 h). Also the possibility of using (TiO2 functionalised) nanofibre membranes for effluent filtration in view of water reuse, was examined. Such secondary effluent filtration tests improved water quality as a reduction in turbidity (69%), humic acids (37%) and bacterial activity (76%) was observed. It can be concluded that nanofibre membranes could be used as a high-flux filtration technique for effluent recuperation.
PB  - Elsevier Science Bv, Amsterdam
T2  - Separation and Purification Technology
T1  - Electrospun nanofibre membranes functionalised with TiO2 nanoparticles: Evaluation of humic acid and bacterial removal from polluted water
EP  - 494
SP  - 488
VL  - 149
DO  - 10.1016/j.seppur.2015.06.016
ER  - 

@article{
author = "Daels, Nele and Radoičić, Marija B. and Radetić, Maja and De Clerck, Karen and Van Hulle, Stijn W. H.",
year = "2015",
abstract = "This study presents contact experiments and filtration tests with nanofibre membranes containing TiO2 nanoparticles in view of effluent treatment. The first part of this study focuses on the removal of dissolved organic matter, more specifically humic acids. Removal of humic acids from secondary wastewater treatment plant effluent as well as from synthetic water solutions was tested. Also the bactericidal effect of the TiO2 functionalised nanofibre membranes was examined. Contact experiments with TiO2 functionalised membranes showed removal of humic acids (83% degradation after 2 h) and Staphylococcus aureus (4.5 log(10)/100 ml after 6 h). Also the possibility of using (TiO2 functionalised) nanofibre membranes for effluent filtration in view of water reuse, was examined. Such secondary effluent filtration tests improved water quality as a reduction in turbidity (69%), humic acids (37%) and bacterial activity (76%) was observed. It can be concluded that nanofibre membranes could be used as a high-flux filtration technique for effluent recuperation.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Separation and Purification Technology",
title = "Electrospun nanofibre membranes functionalised with TiO2 nanoparticles: Evaluation of humic acid and bacterial removal from polluted water",
pages = "494-488",
volume = "149",
doi = "10.1016/j.seppur.2015.06.016"
}

Daels, N., Radoičić, M. B., Radetić, M., De Clerck, K.,& Van Hulle, S. W. H.. (2015). Electrospun nanofibre membranes functionalised with TiO2 nanoparticles: Evaluation of humic acid and bacterial removal from polluted water. in Separation and Purification Technology
Elsevier Science Bv, Amsterdam., 149, 488-494.
https://doi.org/10.1016/j.seppur.2015.06.016

Daels N, Radoičić MB, Radetić M, De Clerck K, Van Hulle SWH. Electrospun nanofibre membranes functionalised with TiO2 nanoparticles: Evaluation of humic acid and bacterial removal from polluted water. in Separation and Purification Technology. 2015;149:488-494.
doi:10.1016/j.seppur.2015.06.016 .

Daels, Nele, Radoičić, Marija B., Radetić, Maja, De Clerck, Karen, Van Hulle, Stijn W. H., "Electrospun nanofibre membranes functionalised with TiO2 nanoparticles: Evaluation of humic acid and bacterial removal from polluted water" in Separation and Purification Technology, 149 (2015):488-494,
https://doi.org/10.1016/j.seppur.2015.06.016 . .

TY  - JOUR
AU  - Daels, Nele
AU  - Radoičić, Marija B.
AU  - Radetić, Maja
AU  - Van Hulle, Stijn W. H.
AU  - De Clerck, Karen
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2671
AB  - In this study, polyamide-6 (PA-6) nanofibre membranes containing TiO2 nanoparticles were successfully prepared by electrospinning. Different types of TiO2 functionalisation methods (inline functionalisation and post-functionalisation) were tested with two types of TiO2 nanoparticles. A colloidal solution consisting of TiO2 nanoparticles with average dimensions of 6 nm was prepared and the performance of these nanoparticles was compared with commercially available Degussa P25 nanoparticles. The photocatalytic activity of the nanofibre membranes functionalised with TiO2 was demonstrated with the degradation of the dye methylene blue. The results of photodegradation with methylene blue in aqueous solution demonstrated excellent photocatalytic activity of TiO2 nanoparticles immobilised in and on the nanofibrous structure. After 2 h of UV irradiation, a degradation up to 84% methylene blue was observed. This degradation further increased and resulted in a degradation up to 99% methylene blue after 6 h of illumination. A stability test of the functional materials confirmed that the TiO2 nanoparticles were successfully incorporated in and onto the electrospun PA-6 fibres. Clean water flux was measured to find out the filter efficiency of the different membranes. The functionalised membranes have a clean water-flux varying from 1.0 x 10(4) to 2.1 x 10(4) l/m(2) h bar. As such, the electrospun nanofibre membranes functionalised with TiO2 nanoparticles show a great potential as a water filter medium with an immobilised photocatalyst in view of dissolved organic matter degradation.
PB  - Elsevier Science Bv, Amsterdam
T2  - Separation and Purification Technology
T1  - Functionalisation of electrospun polymer nanofibre membranes with TiO2 nanoparticles in view of dissolved organic matter photodegradation
EP  - 290
SP  - 282
VL  - 133
DO  - 10.1016/j.seppur.2014.06.040
ER  - 

@article{
author = "Daels, Nele and Radoičić, Marija B. and Radetić, Maja and Van Hulle, Stijn W. H. and De Clerck, Karen",
year = "2014",
abstract = "In this study, polyamide-6 (PA-6) nanofibre membranes containing TiO2 nanoparticles were successfully prepared by electrospinning. Different types of TiO2 functionalisation methods (inline functionalisation and post-functionalisation) were tested with two types of TiO2 nanoparticles. A colloidal solution consisting of TiO2 nanoparticles with average dimensions of 6 nm was prepared and the performance of these nanoparticles was compared with commercially available Degussa P25 nanoparticles. The photocatalytic activity of the nanofibre membranes functionalised with TiO2 was demonstrated with the degradation of the dye methylene blue. The results of photodegradation with methylene blue in aqueous solution demonstrated excellent photocatalytic activity of TiO2 nanoparticles immobilised in and on the nanofibrous structure. After 2 h of UV irradiation, a degradation up to 84% methylene blue was observed. This degradation further increased and resulted in a degradation up to 99% methylene blue after 6 h of illumination. A stability test of the functional materials confirmed that the TiO2 nanoparticles were successfully incorporated in and onto the electrospun PA-6 fibres. Clean water flux was measured to find out the filter efficiency of the different membranes. The functionalised membranes have a clean water-flux varying from 1.0 x 10(4) to 2.1 x 10(4) l/m(2) h bar. As such, the electrospun nanofibre membranes functionalised with TiO2 nanoparticles show a great potential as a water filter medium with an immobilised photocatalyst in view of dissolved organic matter degradation.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Separation and Purification Technology",
title = "Functionalisation of electrospun polymer nanofibre membranes with TiO2 nanoparticles in view of dissolved organic matter photodegradation",
pages = "290-282",
volume = "133",
doi = "10.1016/j.seppur.2014.06.040"
}

Daels, N., Radoičić, M. B., Radetić, M., Van Hulle, S. W. H.,& De Clerck, K.. (2014). Functionalisation of electrospun polymer nanofibre membranes with TiO2 nanoparticles in view of dissolved organic matter photodegradation. in Separation and Purification Technology
Elsevier Science Bv, Amsterdam., 133, 282-290.
https://doi.org/10.1016/j.seppur.2014.06.040

Daels N, Radoičić MB, Radetić M, Van Hulle SWH, De Clerck K. Functionalisation of electrospun polymer nanofibre membranes with TiO2 nanoparticles in view of dissolved organic matter photodegradation. in Separation and Purification Technology. 2014;133:282-290.
doi:10.1016/j.seppur.2014.06.040 .

Daels, Nele, Radoičić, Marija B., Radetić, Maja, Van Hulle, Stijn W. H., De Clerck, Karen, "Functionalisation of electrospun polymer nanofibre membranes with TiO2 nanoparticles in view of dissolved organic matter photodegradation" in Separation and Purification Technology, 133 (2014):282-290,
https://doi.org/10.1016/j.seppur.2014.06.040 . .