Nanosilica/PMMA composites obtained by the modification of silica nanoparticles in a supercritical carbon dioxide-ethanol mixture
Само за регистроване кориснике
2009
Аутори
Stojanović, D.Orlović, A.
Marković, Smilja
Radmilović, Velimir R.
Uskoković, Petar S.
Aleksić, Radoslav
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Nanosilica/poly(methyl methacrylate) (PMMA) composites are used to improve the mechanical properties of neat PMMA polymer. In order to obtain superior mechanical properties, it is essential to achieve good bonding between the SiO2 nanoparticles and the PMMA matrix, which is typically achieved by coating silica nanoparticles with silane coupling agents. In this study, conventional and supercritical coating methods were investigated together with their influence on the mechanical properties of the obtained nanosilica/PMMA composites. The results indicate advantageous properties of nanosilica modified in the supercritical phase of carbon dioxide and ethanol in terms of particle size distribution, amount of coated silane, and dispersion in the PMMA matrix. Careful dispersion of the starting silica nanoparticles in ethanol at low temperatures in order to obtain a nanosilica sol plays an important role in deagglomeration, dispersion, and the coating process. The resulting nanosilica/PMMA com...posite containing nanoparticles obtained by supercritical processing of the nanosilica sol showed an increase in hardness by 44.6% and elastic modulus by 25.7% relative to neat PMMA, as determined using the nanoindentation technique. The dynamic mechanical analysis reveals that addition of nanoparticles as nanosilica sol and nanosilica gel enhances composite storage modulus by about 54.3 and 46.5% at 40 °C. At the same temperature, incorporation of modified silica nanoparticles with conventional method leads to an increase of 15.9% for the storage modulus, probably due to a large silica particle size and lower silane content in this sample. © 2009 Springer Science+Business Media, LLC.
Кључне речи:
nanosilica/poly(methyl methacrylate) / PMMA / composite materialsИзвор:
Journal of Materials Science, 2009, 44, 23, 6223-6232Издавач:
- Springer
DOI: 10.1007/s10853-009-3842-8
ISSN: 0022-2461
WoS: 000270385100002
Scopus: 2-s2.0-70349652528
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Stojanović, D. AU - Orlović, A. AU - Marković, Smilja AU - Radmilović, Velimir R. AU - Uskoković, Petar S. AU - Aleksić, Radoslav PY - 2009 UR - https://dais.sanu.ac.rs/123456789/3457 AB - Nanosilica/poly(methyl methacrylate) (PMMA) composites are used to improve the mechanical properties of neat PMMA polymer. In order to obtain superior mechanical properties, it is essential to achieve good bonding between the SiO2 nanoparticles and the PMMA matrix, which is typically achieved by coating silica nanoparticles with silane coupling agents. In this study, conventional and supercritical coating methods were investigated together with their influence on the mechanical properties of the obtained nanosilica/PMMA composites. The results indicate advantageous properties of nanosilica modified in the supercritical phase of carbon dioxide and ethanol in terms of particle size distribution, amount of coated silane, and dispersion in the PMMA matrix. Careful dispersion of the starting silica nanoparticles in ethanol at low temperatures in order to obtain a nanosilica sol plays an important role in deagglomeration, dispersion, and the coating process. The resulting nanosilica/PMMA composite containing nanoparticles obtained by supercritical processing of the nanosilica sol showed an increase in hardness by 44.6% and elastic modulus by 25.7% relative to neat PMMA, as determined using the nanoindentation technique. The dynamic mechanical analysis reveals that addition of nanoparticles as nanosilica sol and nanosilica gel enhances composite storage modulus by about 54.3 and 46.5% at 40 °C. At the same temperature, incorporation of modified silica nanoparticles with conventional method leads to an increase of 15.9% for the storage modulus, probably due to a large silica particle size and lower silane content in this sample. © 2009 Springer Science+Business Media, LLC. PB - Springer T2 - Journal of Materials Science T1 - Nanosilica/PMMA composites obtained by the modification of silica nanoparticles in a supercritical carbon dioxide-ethanol mixture SP - 6223 EP - 6232 VL - 44 IS - 23 DO - 10.1007/s10853-009-3842-8 UR - https://hdl.handle.net/21.15107/rcub_dais_3457 ER -
@article{ author = "Stojanović, D. and Orlović, A. and Marković, Smilja and Radmilović, Velimir R. and Uskoković, Petar S. and Aleksić, Radoslav", year = "2009", abstract = "Nanosilica/poly(methyl methacrylate) (PMMA) composites are used to improve the mechanical properties of neat PMMA polymer. In order to obtain superior mechanical properties, it is essential to achieve good bonding between the SiO2 nanoparticles and the PMMA matrix, which is typically achieved by coating silica nanoparticles with silane coupling agents. In this study, conventional and supercritical coating methods were investigated together with their influence on the mechanical properties of the obtained nanosilica/PMMA composites. The results indicate advantageous properties of nanosilica modified in the supercritical phase of carbon dioxide and ethanol in terms of particle size distribution, amount of coated silane, and dispersion in the PMMA matrix. Careful dispersion of the starting silica nanoparticles in ethanol at low temperatures in order to obtain a nanosilica sol plays an important role in deagglomeration, dispersion, and the coating process. The resulting nanosilica/PMMA composite containing nanoparticles obtained by supercritical processing of the nanosilica sol showed an increase in hardness by 44.6% and elastic modulus by 25.7% relative to neat PMMA, as determined using the nanoindentation technique. The dynamic mechanical analysis reveals that addition of nanoparticles as nanosilica sol and nanosilica gel enhances composite storage modulus by about 54.3 and 46.5% at 40 °C. At the same temperature, incorporation of modified silica nanoparticles with conventional method leads to an increase of 15.9% for the storage modulus, probably due to a large silica particle size and lower silane content in this sample. © 2009 Springer Science+Business Media, LLC.", publisher = "Springer", journal = "Journal of Materials Science", title = "Nanosilica/PMMA composites obtained by the modification of silica nanoparticles in a supercritical carbon dioxide-ethanol mixture", pages = "6223-6232", volume = "44", number = "23", doi = "10.1007/s10853-009-3842-8", url = "https://hdl.handle.net/21.15107/rcub_dais_3457" }
Stojanović, D., Orlović, A., Marković, S., Radmilović, V. R., Uskoković, P. S.,& Aleksić, R.. (2009). Nanosilica/PMMA composites obtained by the modification of silica nanoparticles in a supercritical carbon dioxide-ethanol mixture. in Journal of Materials Science Springer., 44(23), 6223-6232. https://doi.org/10.1007/s10853-009-3842-8 https://hdl.handle.net/21.15107/rcub_dais_3457
Stojanović D, Orlović A, Marković S, Radmilović VR, Uskoković PS, Aleksić R. Nanosilica/PMMA composites obtained by the modification of silica nanoparticles in a supercritical carbon dioxide-ethanol mixture. in Journal of Materials Science. 2009;44(23):6223-6232. doi:10.1007/s10853-009-3842-8 https://hdl.handle.net/21.15107/rcub_dais_3457 .
Stojanović, D., Orlović, A., Marković, Smilja, Radmilović, Velimir R., Uskoković, Petar S., Aleksić, Radoslav, "Nanosilica/PMMA composites obtained by the modification of silica nanoparticles in a supercritical carbon dioxide-ethanol mixture" in Journal of Materials Science, 44, no. 23 (2009):6223-6232, https://doi.org/10.1007/s10853-009-3842-8 ., https://hdl.handle.net/21.15107/rcub_dais_3457 .