Study of the thermal degradation of bioactive sol–gel coatings for the optimization of its curing process
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
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Study of the thermal degradation of bioactive sol–gel coatings for the optimization of its curing processAutoria
Data de publicació
2012-02Editor
Akadémiai KiadóISSN
1388-6150; 1572-8943Cita bibliogràfica
Journal of Thermal Analysis and Calorimetry (Feb. 2012), vol. 107, no. 2, 499-508Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://link.springer.com/article/10.1007/s10973-011-1553-2Versió
info:eu-repo/semantics/acceptedVersionResum
A set of materials has been prepared by sol–gel
process containing different quantities of hydroxyapatite
(0, 2.5 and 5% HAp w/w) using as silica precursors
glycidyloxypropyltrimethoxysilane (GPTMS) and triethoxy ... [+]
A set of materials has been prepared by sol–gel
process containing different quantities of hydroxyapatite
(0, 2.5 and 5% HAp w/w) using as silica precursors
glycidyloxypropyltrimethoxysilane (GPTMS) and triethoxyvinylsilane
(VTES). In order to optimize the curing
process to obtain sintherized systems (inorganic network)
or hybrid systems (organic–inorganic) a TG and FTIR
studies have been developed and degradation kinetic triplet
parameters were obtained (the activation energy, preexponential
factor, and function of degree of conversion).
The kinetic study was analyzed by means of an integral
isoconversional non-isothermal procedure (model free),
and the kinetic model was determined by the Coats–Redfern
method and through the compensation effect (IKR).
All the systems followed the n = 6 kinetic model. The
addition of HAp increases the thermal stability of the
systems. The isothermal degradation was simulated from
non-isothermal data, and the curing process could be
defined to obtain the two types of materials. Temperature
under 250 C allows the formation of hybrids networks. [-]
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