TY  - JOUR
AU  - Velicić, Zorica
AU  - Rusmirović, Jelena
AU  - Prlainović, Nevena
AU  - Tomić, Nataša
AU  - Veličković, Zlate
AU  - Taleb, Khaled
AU  - Marinković, Aleksandar
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4461
AB  - In this work, the optimization of synthesis of terpolymer monolith based on glycidyl methacrylate (GMA), ethylene glycol dimethacrylate (EGDMA) and additional cross-linkers: trimethylolpropanetriacrylate (TMPTA) or triethylene glycol dimethacrylate (TEGDMA) was performed. Moreover, novel vinyl functionalized cross-linkable polymers: ethanolamine (EA)/methacryloyl (MAC) modified poly (methyl methacrylate) (PMMA), and hydrolyzed poly (ethylene-co-vinyl acetate) copolymer (EVOH) modified with MAC either directly or via ethyl malonyl chloride/EA bridging group (m-EVA) were used as cross-linkable polymer to improve mechanical/elastic properties of the obtained monoliths. Optimization procedure, performed applying response surface methodology (RSM), was focused on the production of materials with improved dimensional stability/integrity and porosity with abundance of epoxide groups capable for immobilization of lipase from Candida rugosa (CRL). Structural characterization of the synthesized monoliths was determined using FTIR, Raman and H-1 NMR spectroscopies, while morphology/porosity was determined by SEM technique and image analysis; and mechanical properties by diametral compression testing. The most potential monolith containing m-EVA polymeric cross-linker, i.e. GMA/EGDMA/TEGDMA/m-EVA monolith, was used as CRL carrier in a two-step immobilization process. Enzyme loading and the activity of obtained preparations for various initial enzyme concentrations were monitored after 4 and 48 h of immobilization. The resulting catalysts show high potency in biocatalytic reactions with the highest percentage of retained initial lipase activity of 64.5%.
PB  - Springer, Dordrecht
T2  - Journal of Polymer Research
T1  - The optimization of glycidyl methacrylate based terpolymer monolith synthesis: an effective Candida rugosa lipase immobilization support
IS  - 5
VL  - 27
DO  - 10.1007/s10965-020-02127-z
ER  - 

@article{
author = "Velicić, Zorica and Rusmirović, Jelena and Prlainović, Nevena and Tomić, Nataša and Veličković, Zlate and Taleb, Khaled and Marinković, Aleksandar",
year = "2020",
abstract = "In this work, the optimization of synthesis of terpolymer monolith based on glycidyl methacrylate (GMA), ethylene glycol dimethacrylate (EGDMA) and additional cross-linkers: trimethylolpropanetriacrylate (TMPTA) or triethylene glycol dimethacrylate (TEGDMA) was performed. Moreover, novel vinyl functionalized cross-linkable polymers: ethanolamine (EA)/methacryloyl (MAC) modified poly (methyl methacrylate) (PMMA), and hydrolyzed poly (ethylene-co-vinyl acetate) copolymer (EVOH) modified with MAC either directly or via ethyl malonyl chloride/EA bridging group (m-EVA) were used as cross-linkable polymer to improve mechanical/elastic properties of the obtained monoliths. Optimization procedure, performed applying response surface methodology (RSM), was focused on the production of materials with improved dimensional stability/integrity and porosity with abundance of epoxide groups capable for immobilization of lipase from Candida rugosa (CRL). Structural characterization of the synthesized monoliths was determined using FTIR, Raman and H-1 NMR spectroscopies, while morphology/porosity was determined by SEM technique and image analysis; and mechanical properties by diametral compression testing. The most potential monolith containing m-EVA polymeric cross-linker, i.e. GMA/EGDMA/TEGDMA/m-EVA monolith, was used as CRL carrier in a two-step immobilization process. Enzyme loading and the activity of obtained preparations for various initial enzyme concentrations were monitored after 4 and 48 h of immobilization. The resulting catalysts show high potency in biocatalytic reactions with the highest percentage of retained initial lipase activity of 64.5%.",
publisher = "Springer, Dordrecht",
journal = "Journal of Polymer Research",
title = "The optimization of glycidyl methacrylate based terpolymer monolith synthesis: an effective Candida rugosa lipase immobilization support",
number = "5",
volume = "27",
doi = "10.1007/s10965-020-02127-z"
}

Velicić, Z., Rusmirović, J., Prlainović, N., Tomić, N., Veličković, Z., Taleb, K.,& Marinković, A.. (2020). The optimization of glycidyl methacrylate based terpolymer monolith synthesis: an effective Candida rugosa lipase immobilization support. in Journal of Polymer Research
Springer, Dordrecht., 27(5).
https://doi.org/10.1007/s10965-020-02127-z

Velicić Z, Rusmirović J, Prlainović N, Tomić N, Veličković Z, Taleb K, Marinković A. The optimization of glycidyl methacrylate based terpolymer monolith synthesis: an effective Candida rugosa lipase immobilization support. in Journal of Polymer Research. 2020;27(5).
doi:10.1007/s10965-020-02127-z .

Velicić, Zorica, Rusmirović, Jelena, Prlainović, Nevena, Tomić, Nataša, Veličković, Zlate, Taleb, Khaled, Marinković, Aleksandar, "The optimization of glycidyl methacrylate based terpolymer monolith synthesis: an effective Candida rugosa lipase immobilization support" in Journal of Polymer Research, 27, no. 5 (2020),
https://doi.org/10.1007/s10965-020-02127-z . .

TY  - JOUR
AU  - Drah, Abdusalam
AU  - Tomić, Nataša
AU  - Velicić, Zorica
AU  - Marinković, Aleksandar
AU  - Radovanović, Željko
AU  - Veličković, Zlate
AU  - Jančić-Heinemann, Radmila
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3546
AB  - The adsorption performance of three-dimensionally ordered macroporous (3DOM) gamma-alumina was investigated for enhanced Pb2+, Ni2+ and Cd2+ removal. The synthesis was based on a modified sol-gel method using a colloidal crystal template (CCT) method based on PMMA microspheres. The structure was characterized by means of FTIR spectroscopy and XRD analysis. The three-dimensional structure was examined by scanning electron microscopy, which enabled image analysis that showed significantly low shrinkage (8.77%) after calcination at 800 degrees C. The influential parameters, including contact time and adsorbent dosage, were investigated in a batch adsorption study. The adsorption equilibrium and kinetic data were found to be in agreement with the Freundlich isotherm for Pb2+ removal and the Dubinin-Radushkevich isotherm for Ni2+ and Cd2+ removal. The time-dependent adsorption was best described by a pseudo-second-order kinetic model and the Weber-Morris model. High adsorption capacities: 95.39, 23.32 and 25.39 mg/g were obtained for Pb2+, Cd2+ and Ni2+ removal at 45 degrees C, respectively. The existence of interconnected macroporous and mesoporous structures of highly ordered gamma-alumina enabled a higher adsorption capacity in comparison with literature data for others alumina-based adsorbents.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Highly ordered macroporous gamma-alumina prepared by a modified sol-gel method with a PMMA microsphere template for enhanced Pb2+, Ni2+ and Cd2+ removal
EP  - 13827
IS  - 16
SP  - 13817
VL  - 43
DO  - 10.1016/j.ceramint.2017.07.102
ER  - 

@article{
author = "Drah, Abdusalam and Tomić, Nataša and Velicić, Zorica and Marinković, Aleksandar and Radovanović, Željko and Veličković, Zlate and Jančić-Heinemann, Radmila",
year = "2017",
abstract = "The adsorption performance of three-dimensionally ordered macroporous (3DOM) gamma-alumina was investigated for enhanced Pb2+, Ni2+ and Cd2+ removal. The synthesis was based on a modified sol-gel method using a colloidal crystal template (CCT) method based on PMMA microspheres. The structure was characterized by means of FTIR spectroscopy and XRD analysis. The three-dimensional structure was examined by scanning electron microscopy, which enabled image analysis that showed significantly low shrinkage (8.77%) after calcination at 800 degrees C. The influential parameters, including contact time and adsorbent dosage, were investigated in a batch adsorption study. The adsorption equilibrium and kinetic data were found to be in agreement with the Freundlich isotherm for Pb2+ removal and the Dubinin-Radushkevich isotherm for Ni2+ and Cd2+ removal. The time-dependent adsorption was best described by a pseudo-second-order kinetic model and the Weber-Morris model. High adsorption capacities: 95.39, 23.32 and 25.39 mg/g were obtained for Pb2+, Cd2+ and Ni2+ removal at 45 degrees C, respectively. The existence of interconnected macroporous and mesoporous structures of highly ordered gamma-alumina enabled a higher adsorption capacity in comparison with literature data for others alumina-based adsorbents.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Highly ordered macroporous gamma-alumina prepared by a modified sol-gel method with a PMMA microsphere template for enhanced Pb2+, Ni2+ and Cd2+ removal",
pages = "13827-13817",
number = "16",
volume = "43",
doi = "10.1016/j.ceramint.2017.07.102"
}

Drah, A., Tomić, N., Velicić, Z., Marinković, A., Radovanović, Ž., Veličković, Z.,& Jančić-Heinemann, R.. (2017). Highly ordered macroporous gamma-alumina prepared by a modified sol-gel method with a PMMA microsphere template for enhanced Pb2+, Ni2+ and Cd2+ removal. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(16), 13817-13827.
https://doi.org/10.1016/j.ceramint.2017.07.102

Drah A, Tomić N, Velicić Z, Marinković A, Radovanović Ž, Veličković Z, Jančić-Heinemann R. Highly ordered macroporous gamma-alumina prepared by a modified sol-gel method with a PMMA microsphere template for enhanced Pb2+, Ni2+ and Cd2+ removal. in Ceramics International. 2017;43(16):13817-13827.
doi:10.1016/j.ceramint.2017.07.102 .

Drah, Abdusalam, Tomić, Nataša, Velicić, Zorica, Marinković, Aleksandar, Radovanović, Željko, Veličković, Zlate, Jančić-Heinemann, Radmila, "Highly ordered macroporous gamma-alumina prepared by a modified sol-gel method with a PMMA microsphere template for enhanced Pb2+, Ni2+ and Cd2+ removal" in Ceramics International, 43, no. 16 (2017):13817-13827,
https://doi.org/10.1016/j.ceramint.2017.07.102 . .