Effect of gamma-irradiation on the hydrolytic stability and thermo-oxidative behavior of bio/inorganic modified urea-formaldehyde resins
Authorized Users Only
2015
Authors
Petković, Branka B.Samaržija-Jovanović, Suzana
Jovanović, Vojislav
Dekić, Biljana
Marković, Gordana
Marinović-Cincović, Milena
Article (Published version)
,
© 2014 Elsevier Ltd
Metadata
Show full item recordAbstract
In order to minimize emission of formaldehyde from urea formaldehyde resins (UF) and to improve their thermo-oxidative behavior, the effect of low gamma-irradiation on hydrolytic and thermo-oxidative stability of nano-silica modified UF resin, modified UF resin with wood flour (Pinus silvestris L.) as natural filler and modified UF resin with mixture of SiO2/WF fillers were investigated. The hydrolytic stability of modified UF resins was determined by measuring the mass loss and liberated formaldehyde concentration of modified UF resins after acid hydrolysis. The studied modified UF resins have been irradiated (50 kGy) and effect of gamma-irradiation was evaluated on the basis of percentage of liberated formaldehyde before and after irradiation. The minimum percentage (1.23%) of liberated formaldehyde and mass loss of a 25.35% were obtained in wood flour modified UF resin after 7-irradiation which indicate significant improvement in the hydrolytic stability compared to other modified U...F resins. The effect of gamma-irradiation was evaluated also on the basis of thermo-oxidative behavior of the same modified UF resins before and after irradiation. The thermo-oxidative behavior was studied by non-isothermal thermo-gravimetric analysis (TG), differential thermo-gravimetly (DTG) and differential thermal analysis (DTA) supported by data from IR spectroscopy. After gamma-irradiation, the shift of DTA peaks a higher temperature indicates that thermo-oxidative stability of modified UF/SiO2/WF is increase. (C) 2014 Elsevier Ltd. All rights reserved.
Keywords:
Wood / Resins / Thermal analysis / gamma-irradiationSource:
Composites: Part B: Engineering, 2015, 69, 397-405Funding / projects:
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Multiscale structuring of polymer nanocomposites and functional materials based on different precursors (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45022)
DOI: 10.1016/j.compositesb.2014.10.033
ISSN: 1359-8368
WoS: 000347266600045
Scopus: 2-s2.0-84921535829
Collections
Institution/Community
VinčaTY - JOUR AU - Petković, Branka B. AU - Samaržija-Jovanović, Suzana AU - Jovanović, Vojislav AU - Dekić, Biljana AU - Marković, Gordana AU - Marinović-Cincović, Milena PY - 2015 UR - https://vinar.vin.bg.ac.rs/handle/123456789/333 AB - In order to minimize emission of formaldehyde from urea formaldehyde resins (UF) and to improve their thermo-oxidative behavior, the effect of low gamma-irradiation on hydrolytic and thermo-oxidative stability of nano-silica modified UF resin, modified UF resin with wood flour (Pinus silvestris L.) as natural filler and modified UF resin with mixture of SiO2/WF fillers were investigated. The hydrolytic stability of modified UF resins was determined by measuring the mass loss and liberated formaldehyde concentration of modified UF resins after acid hydrolysis. The studied modified UF resins have been irradiated (50 kGy) and effect of gamma-irradiation was evaluated on the basis of percentage of liberated formaldehyde before and after irradiation. The minimum percentage (1.23%) of liberated formaldehyde and mass loss of a 25.35% were obtained in wood flour modified UF resin after 7-irradiation which indicate significant improvement in the hydrolytic stability compared to other modified UF resins. The effect of gamma-irradiation was evaluated also on the basis of thermo-oxidative behavior of the same modified UF resins before and after irradiation. The thermo-oxidative behavior was studied by non-isothermal thermo-gravimetric analysis (TG), differential thermo-gravimetly (DTG) and differential thermal analysis (DTA) supported by data from IR spectroscopy. After gamma-irradiation, the shift of DTA peaks a higher temperature indicates that thermo-oxidative stability of modified UF/SiO2/WF is increase. (C) 2014 Elsevier Ltd. All rights reserved. T2 - Composites: Part B: Engineering T1 - Effect of gamma-irradiation on the hydrolytic stability and thermo-oxidative behavior of bio/inorganic modified urea-formaldehyde resins VL - 69 SP - 397 EP - 405 DO - 10.1016/j.compositesb.2014.10.033 ER -
@article{ author = "Petković, Branka B. and Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Dekić, Biljana and Marković, Gordana and Marinović-Cincović, Milena", year = "2015", abstract = "In order to minimize emission of formaldehyde from urea formaldehyde resins (UF) and to improve their thermo-oxidative behavior, the effect of low gamma-irradiation on hydrolytic and thermo-oxidative stability of nano-silica modified UF resin, modified UF resin with wood flour (Pinus silvestris L.) as natural filler and modified UF resin with mixture of SiO2/WF fillers were investigated. The hydrolytic stability of modified UF resins was determined by measuring the mass loss and liberated formaldehyde concentration of modified UF resins after acid hydrolysis. The studied modified UF resins have been irradiated (50 kGy) and effect of gamma-irradiation was evaluated on the basis of percentage of liberated formaldehyde before and after irradiation. The minimum percentage (1.23%) of liberated formaldehyde and mass loss of a 25.35% were obtained in wood flour modified UF resin after 7-irradiation which indicate significant improvement in the hydrolytic stability compared to other modified UF resins. The effect of gamma-irradiation was evaluated also on the basis of thermo-oxidative behavior of the same modified UF resins before and after irradiation. The thermo-oxidative behavior was studied by non-isothermal thermo-gravimetric analysis (TG), differential thermo-gravimetly (DTG) and differential thermal analysis (DTA) supported by data from IR spectroscopy. After gamma-irradiation, the shift of DTA peaks a higher temperature indicates that thermo-oxidative stability of modified UF/SiO2/WF is increase. (C) 2014 Elsevier Ltd. All rights reserved.", journal = "Composites: Part B: Engineering", title = "Effect of gamma-irradiation on the hydrolytic stability and thermo-oxidative behavior of bio/inorganic modified urea-formaldehyde resins", volume = "69", pages = "397-405", doi = "10.1016/j.compositesb.2014.10.033" }
Petković, B. B., Samaržija-Jovanović, S., Jovanović, V., Dekić, B., Marković, G.,& Marinović-Cincović, M.. (2015). Effect of gamma-irradiation on the hydrolytic stability and thermo-oxidative behavior of bio/inorganic modified urea-formaldehyde resins. in Composites: Part B: Engineering, 69, 397-405. https://doi.org/10.1016/j.compositesb.2014.10.033
Petković BB, Samaržija-Jovanović S, Jovanović V, Dekić B, Marković G, Marinović-Cincović M. Effect of gamma-irradiation on the hydrolytic stability and thermo-oxidative behavior of bio/inorganic modified urea-formaldehyde resins. in Composites: Part B: Engineering. 2015;69:397-405. doi:10.1016/j.compositesb.2014.10.033 .
Petković, Branka B., Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Dekić, Biljana, Marković, Gordana, Marinović-Cincović, Milena, "Effect of gamma-irradiation on the hydrolytic stability and thermo-oxidative behavior of bio/inorganic modified urea-formaldehyde resins" in Composites: Part B: Engineering, 69 (2015):397-405, https://doi.org/10.1016/j.compositesb.2014.10.033 . .