Study of the thermal degradation of bioactive sol–gel coatings for the optimization of its curing process
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7034
comunitat-uji-handle3:10234/8619
comunitat-uji-handle4:
INVESTIGACIONMetadata
Title
Study of the thermal degradation of bioactive sol–gel coatings for the optimization of its curing processAuthor (s)
Date
2012-02Publisher
Akadémiai KiadóISSN
1388-6150; 1572-8943Bibliographic citation
Journal of Thermal Analysis and Calorimetry (Feb. 2012), vol. 107, no. 2, 499-508Type
info:eu-repo/semantics/articlePublisher version
https://link.springer.com/article/10.1007/s10973-011-1553-2Version
info:eu-repo/semantics/acceptedVersionAbstract
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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