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Estimation of adhesion energy of alumina scales on FeCrAl alloys: effect of the TiO2sol-gel coating

“…TiO 2 sol-gel films were prepared from the TIPT precursor using a procedure close to that proposed in reference [5]. Oxidation of treated FeCrAl samples was carried out in a horizontal furnace under an atmosphere of (Ar + 15%O 2 ).…”

Surface modification, characterization and biofunctionality of pegylated titanate films obtained by the sol‐gel method

“…Firstly, we prepared a 0.4 M TIPT solution in ethanol containing a precise TIPT/water ratio (r w = 0.82) and controlled pH (pH = 1.27). [4] Secondly, a selected quantity of PEG was dissolved in toluene to form a 5% w/v solution. Mixtures were prepared to obtain 95, 90, 80, and 60% molar PEG precursors plus two reference precursors for 100% TIPT and 100% PEG.…”

“…These results are coherent with previous analyses that underline the high n, low k values for TIPT derived films, especially below 500 nm. [4] Particularly, the very low absorption measured for every sample at wavelengths above 500 nm makes the films compatible with the ophthalmic applications.…”

“…These films were prepared by the sol-gel process using titanium isopropoxide (TIPT) as precursor leading to the inorganic phase, which has previously led to optically functional films. [4] Materials used for the fabrication of ophthalmic lenses (both intra and exo) require a complex equilibrium of optical, surface antifouling and mechanical properties to become functional. In this work we propose the use of poly(ethylene-glycol) (PEG), a recurrent polymer used in antifouling applications at biomolecular and cellular level, [5] to form hybrid films with TIPT as potential enhancers of optical and surface properties of ophthalmic lenses in view of the reputed antifouling properties of PEG and the above-mentioned optical properties of TIPT.…”

Identification of the First Limiting Amino Acid in Cooked Polished White Rice Fed to Weanling Holtzman Rats

“…On top the advantages offered, however, the sol−gel process has a major limitation, which is the low crystallinity in the resulting TiO 2 phase, as a consequence of the relatively low processing temperatures. In connection with this problem, Brinker and Hurd [11] and Langlet et al [12] proposed that the largely amorphous nature of TiO 2 films could be due to the high functionality of titanium alkoxide favoring the fast development of a stiff Ti−O−Ti network, which in turn hinders the condensation and densification during drying. In this connection, further studies by Matsuda et al [13] and Kotani et al [14] suggested that structural changes of sol−gel films can be induced by the treatment in a high humidity environment at temperatures above 100 o C. Further investigation by Imai et al [15] and Imai and Hirashima [16] confirmed that exposure of sol−gel derived TiO 2 films to water vapor induced rearrangement of Ti-O-Ti network leading to formation of anatase phase at relatively low temperature (180 o C).…”