Influence of modified montmorillonites on formaldehyde content in urea-formaldehyde/montmorillonite composites
Аутори
Ristić, MirjanaSamaržija-Jovanović, Suzana
Jovanović, Vojislav
Kostić, Marija
Jovanović, Tijana
Marković, Gordana
Marinović-Cincović, Milena
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The effect of different montmorillonites (KSF and K10) and their modifications (Na-KSF, Na-K10) on content of formaldehyde-FA (free and liberated) modified urea-formaldehyde (UF) composites was investigated. KSF and K10 were modified by sodium chloride (NaCl). A total of four samples were synthesized, with the designations UF/KSF, UF/Na-KSF, UF/K10, and UF/Na-K10, under the same conditions. The content of free FA was determined by the bisulfite method. The hydrolytic stability of modified UF resin was determined by measuring the concentration of liberated FA of modified UF composites after acid hydrolysis. The specific surface area of the tested montmorillonites was determined by the Sear's method. Higher values of specific surface area were obtained for pure KSF (149.4 m2/g) compared to modified Na-KSF (48.6 m2/g). Specific surface area for pure K10 was 111 m 2/g, compared to value of 71 m2/g for modified Na-K10. The amount of free and liberated FA was 0.4%, 0.12% and 1.2% and 2.3%, r...espectively for UF/KSF and UF/Na-KSF composite. The values for free FA for UF/K10 and UF/Na-K10 composite are the same and amount to 0.6%. It was concluded that the UF/Na-KSF composite has a smaller content of free FA (0.12%) compared to other UF composites. The UF/KSF composite has a higher resistance to acidic hydrolysis and lower liberated FA percent (1.2%).
Кључне речи:
Montmorillonite / Free and liberated formaldehyde / Urea-formaldehyde compositeИзвор:
2nd International Conference on Advanced Production and Processing : the book of abstracts; Oct 20-22, Novi Sad, 2022, 122-122Издавач:
- Novi Sad : University of Novi Sad, Faculty of Technology
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200123 (Универзитет у Приштини са привременим седиштем у Косовској Митровици, Природно-математички факултет) (RS-MESTD-inst-2020-200123)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200017 (Универзитет у Београду, Институт за нуклеарне науке Винча, Београд-Винча) (RS-MESTD-inst-2020-200017)
Колекције
Институција/група
VinčaTY - CONF AU - Ristić, Mirjana AU - Samaržija-Jovanović, Suzana AU - Jovanović, Vojislav AU - Kostić, Marija AU - Jovanović, Tijana AU - Marković, Gordana AU - Marinović-Cincović, Milena PY - 2022 UR - https://vinar.vin.bg.ac.rs/handle/123456789/12248 AB - The effect of different montmorillonites (KSF and K10) and their modifications (Na-KSF, Na-K10) on content of formaldehyde-FA (free and liberated) modified urea-formaldehyde (UF) composites was investigated. KSF and K10 were modified by sodium chloride (NaCl). A total of four samples were synthesized, with the designations UF/KSF, UF/Na-KSF, UF/K10, and UF/Na-K10, under the same conditions. The content of free FA was determined by the bisulfite method. The hydrolytic stability of modified UF resin was determined by measuring the concentration of liberated FA of modified UF composites after acid hydrolysis. The specific surface area of the tested montmorillonites was determined by the Sear's method. Higher values of specific surface area were obtained for pure KSF (149.4 m2/g) compared to modified Na-KSF (48.6 m2/g). Specific surface area for pure K10 was 111 m 2/g, compared to value of 71 m2/g for modified Na-K10. The amount of free and liberated FA was 0.4%, 0.12% and 1.2% and 2.3%, respectively for UF/KSF and UF/Na-KSF composite. The values for free FA for UF/K10 and UF/Na-K10 composite are the same and amount to 0.6%. It was concluded that the UF/Na-KSF composite has a smaller content of free FA (0.12%) compared to other UF composites. The UF/KSF composite has a higher resistance to acidic hydrolysis and lower liberated FA percent (1.2%). PB - Novi Sad : University of Novi Sad, Faculty of Technology C3 - 2nd International Conference on Advanced Production and Processing : the book of abstracts; Oct 20-22, Novi Sad T1 - Influence of modified montmorillonites on formaldehyde content in urea-formaldehyde/montmorillonite composites SP - 122 EP - 122 UR - https://hdl.handle.net/21.15107/rcub_vinar_12248 ER -
@conference{ author = "Ristić, Mirjana and Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Kostić, Marija and Jovanović, Tijana and Marković, Gordana and Marinović-Cincović, Milena", year = "2022", abstract = "The effect of different montmorillonites (KSF and K10) and their modifications (Na-KSF, Na-K10) on content of formaldehyde-FA (free and liberated) modified urea-formaldehyde (UF) composites was investigated. KSF and K10 were modified by sodium chloride (NaCl). A total of four samples were synthesized, with the designations UF/KSF, UF/Na-KSF, UF/K10, and UF/Na-K10, under the same conditions. The content of free FA was determined by the bisulfite method. The hydrolytic stability of modified UF resin was determined by measuring the concentration of liberated FA of modified UF composites after acid hydrolysis. The specific surface area of the tested montmorillonites was determined by the Sear's method. Higher values of specific surface area were obtained for pure KSF (149.4 m2/g) compared to modified Na-KSF (48.6 m2/g). Specific surface area for pure K10 was 111 m 2/g, compared to value of 71 m2/g for modified Na-K10. The amount of free and liberated FA was 0.4%, 0.12% and 1.2% and 2.3%, respectively for UF/KSF and UF/Na-KSF composite. The values for free FA for UF/K10 and UF/Na-K10 composite are the same and amount to 0.6%. It was concluded that the UF/Na-KSF composite has a smaller content of free FA (0.12%) compared to other UF composites. The UF/KSF composite has a higher resistance to acidic hydrolysis and lower liberated FA percent (1.2%).", publisher = "Novi Sad : University of Novi Sad, Faculty of Technology", journal = "2nd International Conference on Advanced Production and Processing : the book of abstracts; Oct 20-22, Novi Sad", title = "Influence of modified montmorillonites on formaldehyde content in urea-formaldehyde/montmorillonite composites", pages = "122-122", url = "https://hdl.handle.net/21.15107/rcub_vinar_12248" }
Ristić, M., Samaržija-Jovanović, S., Jovanović, V., Kostić, M., Jovanović, T., Marković, G.,& Marinović-Cincović, M.. (2022). Influence of modified montmorillonites on formaldehyde content in urea-formaldehyde/montmorillonite composites. in 2nd International Conference on Advanced Production and Processing : the book of abstracts; Oct 20-22, Novi Sad Novi Sad : University of Novi Sad, Faculty of Technology., 122-122. https://hdl.handle.net/21.15107/rcub_vinar_12248
Ristić M, Samaržija-Jovanović S, Jovanović V, Kostić M, Jovanović T, Marković G, Marinović-Cincović M. Influence of modified montmorillonites on formaldehyde content in urea-formaldehyde/montmorillonite composites. in 2nd International Conference on Advanced Production and Processing : the book of abstracts; Oct 20-22, Novi Sad. 2022;:122-122. https://hdl.handle.net/21.15107/rcub_vinar_12248 .
Ristić, Mirjana, Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Kostić, Marija, Jovanović, Tijana, Marković, Gordana, Marinović-Cincović, Milena, "Influence of modified montmorillonites on formaldehyde content in urea-formaldehyde/montmorillonite composites" in 2nd International Conference on Advanced Production and Processing : the book of abstracts; Oct 20-22, Novi Sad (2022):122-122, https://hdl.handle.net/21.15107/rcub_vinar_12248 .