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Titanium dioxide nanoparticles surface modified with imine as fillers for epoxy resin

Nanočestice titan-dioksida površinski modifikovane iminom kao punioci za epoksidnu smolu

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2018
2273.pdf (1.378Mb)
Authors
Džunuzović, Enis S.
Ćirjaković, Stefan
Kovač, Tijana
Tomić, Miloš
Dapčević, Aleksandra
Džunuzović, Jasna
Article (Published version)
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Abstract
The surface of anatase TiO2 nanoparticles was modified with in situ synthesized imine, based on 3,4-dihydroxybenzaldehyde and octadecylamine. The modified TiO2 nanoparticles were investigated using FTIR and UV-Vis spectroscopy, which confirmed the formation of the charge transfer complex between imine and surface of TiO2 nanoparticles by the reaction of surface Ti atoms with hydroxyl groups of a modifying agent. TiO2 nanoparticles modified with imine were further applied as a filler for the preparation of epoxy based nanocomposites. Thermal and mechani­cal properties of the prepared nanocomposites were examined using the dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis and hardness measurements. The obtained results have shown that modified TiO2 nanoparticles have no significant influence on the glass transition temperature and that they slow down thermo-oxidative degradation of epoxy resin in the first stage and increase hardness of the crossl...inked epoxy resin.

Površina nanočestica TiO2 modifikovana je 'in situ' sintetisanim iminom na bazi 3,4-dihidroksibenzaldehida i oktadecilamina. Modifikovane TiO2 nanočestice su ispitivane primenom FTIR i UV-Vis spektroskopije, čime je potvrđeno formiran­je 'charge transfer' kompleksa između imina i površine TiO2 nanočestica preko reakcije Ti atoma na površini čestica sa hidroksilnim grupama modifikatora. Modifikovane TiO2 nanočestice su zatim iskorišćene kao punioci za pripremu nanokompozita na bazi epoksidne smole. Termička i mehanička svojstva pripremljenih na­nokompozita su ispitana primenom dinamičko mehaničke analize, diferencijalne skenirajuće kalorimetrije, termogravimetrijske analize i ispitivanjem njihove tvrdoće. Dobijeni rezultati su pokazali da TiO2 nanočestice površinski modifikovane iminom ne utiču značajno na temperaturu ostakljivanja epoksidne smole, da usporavaju termooksidativnu degradaciju u prvom stupnju i da povećavaju tvrdoću umrežene epoksidne smole.
Keywords:
epoxy/TiO2 nanocomposites / surface modification / imine / thermal properties / mechanical properties / epoksi/TiO2 nanokompoziti / površinska modifikacija / imin / termička svojstva / mehanička svojstva
Source:
Advanced Technologies, 2018, 7, 2, 46-53
Publisher:
  • Tehnološki fakultet, Leskovac
Projects:
  • Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-172062)

DOI: 10.5937/SavTeh1802046D

ISSN: 2406-2979

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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/2275
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