Synthesis, characterization, hydrolytic, and thermal stability of urea–formaldehyde composites based on modified montmorillonite K10
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2022
Authors
Samaržija-Jovanović, Suzana
Jovanović, Vojislav

Jovanović, Tijana
Petković, Branka

Marković, Gordana
Porobić, Slavica

Marinović-Cincović, Milena

Article (Published version)

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In this study, the thermal and hydrolytic properties of composite systems based on the urea–formaldehyde resin (UF) and eco-friendly montmorillonite (K10) as formaldehyde (FA) scavenger were examined. UF resin with molar ratio FA:U = 0.8 was synthesized in situ with inactivated, and activated K10. K10 was activated by sulfuric acid (H2SO4) with and without magnetic stirring. The samples are marked with $${\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4}\right)}$$,$${\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$, $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$, and $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$, respectively. X-ray diffraction analysis and non-isothermal thermogravimetric analysis, supported by data from Fourier transform infrared spectroscopy and scanning electron microscopy were used to characterize the samples. Based on the measurement of speci...fic surface area (SSA), the degree of activation was determined. Measurement of the SSA shows that higher values were obtained for modified K10 compared to inactive K10. The amount of free and liberated FA was 0.06% and 4.6% for $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$and 0.12% and 4% for $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$. This research showed that the $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$composite has a lesser amount of free FA (0.06%) in comparison to the $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite (0.12%). The $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite has a higher resistance to acidic hydrolysis. The modified $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4}\right)}$$composite is more thermally stable than $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite.
Source:
Journal of Thermal Analysis and Calorimetry, 2022Funding / projects:
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200123 (University of Priština - Kosovska Mitrovica, Faculty of Natural Sciences and Mathematics) (RS-200123)
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200017 (University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča) (RS-200017)
DOI: 10.1007/s10973-022-11238-2
ISSN: 1588-2926
WoS: 000754148700003
Scopus: 2-s2.0-85124599808
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VinčaTY - JOUR AU - Samaržija-Jovanović, Suzana AU - Jovanović, Vojislav AU - Jovanović, Tijana AU - Petković, Branka AU - Marković, Gordana AU - Porobić, Slavica AU - Marinović-Cincović, Milena PY - 2022 UR - https://vinar.vin.bg.ac.rs/handle/123456789/10164 AB - In this study, the thermal and hydrolytic properties of composite systems based on the urea–formaldehyde resin (UF) and eco-friendly montmorillonite (K10) as formaldehyde (FA) scavenger were examined. UF resin with molar ratio FA:U = 0.8 was synthesized in situ with inactivated, and activated K10. K10 was activated by sulfuric acid (H2SO4) with and without magnetic stirring. The samples are marked with $${\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4}\right)}$$,$${\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$, $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$, and $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$, respectively. X-ray diffraction analysis and non-isothermal thermogravimetric analysis, supported by data from Fourier transform infrared spectroscopy and scanning electron microscopy were used to characterize the samples. Based on the measurement of specific surface area (SSA), the degree of activation was determined. Measurement of the SSA shows that higher values were obtained for modified K10 compared to inactive K10. The amount of free and liberated FA was 0.06% and 4.6% for $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$and 0.12% and 4% for $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$. This research showed that the $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$composite has a lesser amount of free FA (0.06%) in comparison to the $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite (0.12%). The $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite has a higher resistance to acidic hydrolysis. The modified $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4}\right)}$$composite is more thermally stable than $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite. T2 - Journal of Thermal Analysis and Calorimetry T1 - Synthesis, characterization, hydrolytic, and thermal stability of urea–formaldehyde composites based on modified montmorillonite K10 DO - 10.1007/s10973-022-11238-2 ER -
@article{ author = "Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Jovanović, Tijana and Petković, Branka and Marković, Gordana and Porobić, Slavica and Marinović-Cincović, Milena", year = "2022", abstract = "In this study, the thermal and hydrolytic properties of composite systems based on the urea–formaldehyde resin (UF) and eco-friendly montmorillonite (K10) as formaldehyde (FA) scavenger were examined. UF resin with molar ratio FA:U = 0.8 was synthesized in situ with inactivated, and activated K10. K10 was activated by sulfuric acid (H2SO4) with and without magnetic stirring. The samples are marked with $${\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4}\right)}$$,$${\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$, $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$, and $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$, respectively. X-ray diffraction analysis and non-isothermal thermogravimetric analysis, supported by data from Fourier transform infrared spectroscopy and scanning electron microscopy were used to characterize the samples. Based on the measurement of specific surface area (SSA), the degree of activation was determined. Measurement of the SSA shows that higher values were obtained for modified K10 compared to inactive K10. The amount of free and liberated FA was 0.06% and 4.6% for $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$and 0.12% and 4% for $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$. This research showed that the $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}$$composite has a lesser amount of free FA (0.06%) in comparison to the $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite (0.12%). The $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite has a higher resistance to acidic hydrolysis. The modified $${\mathrm{UF}/\mathrm{K}10}_{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4}\right)}$$composite is more thermally stable than $${\mathrm{UF}/\mathrm{K}10}_{{\left({\mathrm{H}}_{2}{\mathrm{SO}}_{4 }\right)}_{\mathrm{ST}}}$$composite.", journal = "Journal of Thermal Analysis and Calorimetry", title = "Synthesis, characterization, hydrolytic, and thermal stability of urea–formaldehyde composites based on modified montmorillonite K10", doi = "10.1007/s10973-022-11238-2" }
Samaržija-Jovanović, S., Jovanović, V., Jovanović, T., Petković, B., Marković, G., Porobić, S.,& Marinović-Cincović, M.. (2022). Synthesis, characterization, hydrolytic, and thermal stability of urea–formaldehyde composites based on modified montmorillonite K10. in Journal of Thermal Analysis and Calorimetry. https://doi.org/10.1007/s10973-022-11238-2
Samaržija-Jovanović S, Jovanović V, Jovanović T, Petković B, Marković G, Porobić S, Marinović-Cincović M. Synthesis, characterization, hydrolytic, and thermal stability of urea–formaldehyde composites based on modified montmorillonite K10. in Journal of Thermal Analysis and Calorimetry. 2022;. doi:10.1007/s10973-022-11238-2 .
Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Jovanović, Tijana, Petković, Branka, Marković, Gordana, Porobić, Slavica, Marinović-Cincović, Milena, "Synthesis, characterization, hydrolytic, and thermal stability of urea–formaldehyde composites based on modified montmorillonite K10" in Journal of Thermal Analysis and Calorimetry (2022), https://doi.org/10.1007/s10973-022-11238-2 . .