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Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites

Authorized Users Only
2012
Authors
Džunuzović, Enis S.
Džunuzović, Jasna
Marinković, Aleksandar D.
Marinović-Cincović, Milena
Jeremić, Katarina B.
Nedeljković, Jovan M.
Article (Published version)
Metadata
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Abstract
Nanocomposites based on poly(methyl methacrylate) (PMMA) and TiO2 nanoparticles were synthesized by in situ radical polymerization of MMA in solution. The surface of TiO2 nanoparticles was modified with four gallic acid esters (octyl, decyl, lauryl and cetyl gallate). The content of gallates present on the surface of TiO2, was calculated from the TGA results. The influence of length of hydrophobic tail of amphiphilic alkyl gallates on dispersability of surface modified TiO2 nanoparticles in PMMA matrix, the molecular weight and glass transition temperature of PMMA, as well as the thermal stability of the prepared PMMA/TiO2 nanocomposites in nitrogen and air was investigated. The influence of content of TiO2 nanoparticles on the properties of these nanocomposites was also examined. The formation of a charge transfer complex between the surface Ti atoms and the gallates was confirmed by FTIR and LIN/spectroscopy. TEM micrographs of the PMMA/TiO2 nanocomposites revealed that degree of TiO...2 aggregation can be significantly lowered by increasing the length of aliphatic part of the used gallates. The molecular weight of PMMA slightly decreases with the increase of TiO2 content, indicating that used TiO2 nanoparticles act as radical scavengers during the polymerization of MMA. The presence of surface modified TiO2 nanoparticles do not have an influence on the mobility of PMMA chain segments leading to the same values of glass transition temperature for all investigated samples. Thermal and thermo-oxidative stability of the PMMA matrix are improved by introducing TiO2 nanoparticles modified with gallates.

Keywords:
Poly(methyl methacrylate) / YiO(2) / Nanocomposites / Surface modification / Thermal properties / Alkyl gallates
Source:
European Polymer Journal, 2012, 48, 8, 1385-1393
Publisher:
  • Pergamon-Elsevier Science Ltd, Oxford
Projects:
  • Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-45020)
  • Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-172062)

DOI: 10.1016/j.eurpolymj.2012.05.017

ISSN: 0014-3057

WoS: 000312351200003

Scopus: 2-s2.0-84863980579
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1064
Collections
  • Radovi istraživača / Researchers' publications
Institution
IHTM
TY  - JOUR
AU  - Džunuzović, Enis S.
AU  - Džunuzović, Jasna
AU  - Marinković, Aleksandar D.
AU  - Marinović-Cincović, Milena
AU  - Jeremić, Katarina B.
AU  - Nedeljković, Jovan M.
PY  - 2012
UR  - http://cer.ihtm.bg.ac.rs/handle/123456789/1064
AB  - Nanocomposites based on poly(methyl methacrylate) (PMMA) and TiO2 nanoparticles were synthesized by in situ radical polymerization of MMA in solution. The surface of TiO2 nanoparticles was modified with four gallic acid esters (octyl, decyl, lauryl and cetyl gallate). The content of gallates present on the surface of TiO2, was calculated from the TGA results. The influence of length of hydrophobic tail of amphiphilic alkyl gallates on dispersability of surface modified TiO2 nanoparticles in PMMA matrix, the molecular weight and glass transition temperature of PMMA, as well as the thermal stability of the prepared PMMA/TiO2 nanocomposites in nitrogen and air was investigated. The influence of content of TiO2 nanoparticles on the properties of these nanocomposites was also examined. The formation of a charge transfer complex between the surface Ti atoms and the gallates was confirmed by FTIR and LIN/spectroscopy. TEM micrographs of the PMMA/TiO2 nanocomposites revealed that degree of TiO2 aggregation can be significantly lowered by increasing the length of aliphatic part of the used gallates. The molecular weight of PMMA slightly decreases with the increase of TiO2 content, indicating that used TiO2 nanoparticles act as radical scavengers during the polymerization of MMA. The presence of surface modified TiO2 nanoparticles do not have an influence on the mobility of PMMA chain segments leading to the same values of glass transition temperature for all investigated samples. Thermal and thermo-oxidative stability of the PMMA matrix are improved by introducing TiO2 nanoparticles modified with gallates.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - European Polymer Journal
T1  - Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites
VL  - 48
IS  - 8
SP  - 1385
EP  - 1393
DO  - 10.1016/j.eurpolymj.2012.05.017
ER  - 
@article{
author = "Džunuzović, Enis S. and Džunuzović, Jasna and Marinković, Aleksandar D. and Marinović-Cincović, Milena and Jeremić, Katarina B. and Nedeljković, Jovan M.",
year = "2012",
url = "http://cer.ihtm.bg.ac.rs/handle/123456789/1064",
abstract = "Nanocomposites based on poly(methyl methacrylate) (PMMA) and TiO2 nanoparticles were synthesized by in situ radical polymerization of MMA in solution. The surface of TiO2 nanoparticles was modified with four gallic acid esters (octyl, decyl, lauryl and cetyl gallate). The content of gallates present on the surface of TiO2, was calculated from the TGA results. The influence of length of hydrophobic tail of amphiphilic alkyl gallates on dispersability of surface modified TiO2 nanoparticles in PMMA matrix, the molecular weight and glass transition temperature of PMMA, as well as the thermal stability of the prepared PMMA/TiO2 nanocomposites in nitrogen and air was investigated. The influence of content of TiO2 nanoparticles on the properties of these nanocomposites was also examined. The formation of a charge transfer complex between the surface Ti atoms and the gallates was confirmed by FTIR and LIN/spectroscopy. TEM micrographs of the PMMA/TiO2 nanocomposites revealed that degree of TiO2 aggregation can be significantly lowered by increasing the length of aliphatic part of the used gallates. The molecular weight of PMMA slightly decreases with the increase of TiO2 content, indicating that used TiO2 nanoparticles act as radical scavengers during the polymerization of MMA. The presence of surface modified TiO2 nanoparticles do not have an influence on the mobility of PMMA chain segments leading to the same values of glass transition temperature for all investigated samples. Thermal and thermo-oxidative stability of the PMMA matrix are improved by introducing TiO2 nanoparticles modified with gallates.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "European Polymer Journal",
title = "Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites",
volume = "48",
number = "8",
pages = "1385-1393",
doi = "10.1016/j.eurpolymj.2012.05.017"
}
Džunuzović ES, Džunuzović J, Marinković AD, Marinović-Cincović M, Jeremić KB, Nedeljković JM. Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites. European Polymer Journal. 2012;48(8):1385-1393
Džunuzović, E. S., Džunuzović, J., Marinković, A. D., Marinović-Cincović, M., Jeremić, K. B.,& Nedeljković, J. M. (2012). Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites.
European Polymer JournalPergamon-Elsevier Science Ltd, Oxford., 48(8), 1385-1393.
https://doi.org/10.1016/j.eurpolymj.2012.05.017
Džunuzović Enis S., Džunuzović Jasna, Marinković Aleksandar D., Marinović-Cincović Milena, Jeremić Katarina B., Nedeljković Jovan M., "Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites" 48, no. 8 (2012):1385-1393,
https://doi.org/10.1016/j.eurpolymj.2012.05.017 .

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