RT Journal Article
T1 Study of the thermal degradation of bioactive sol-gel coatings for the optimization of its curing process
A1 Hernández-Escolano, M.
A1 Ramis, X.
A1 Jiménez Morales, Antonia
A1 Juan-Díaz, M.
A1 Suay, J.
AB 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, pre-exponential 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.
PB Elsevier
SN 1388-6150 (print)
SN 1572-8943 (online)
YR 2012
FD 2012-02
LK https://hdl.handle.net/10016/20587
UL https://hdl.handle.net/10016/20587
LA eng
DS e-Archivo
RD 1 sept. 2024