Artículos de revistas
The influence of Na+ on the anilinepropylsilica xerogel synthesis by using the fluoride nucleophilic catalyst
Registro en:
Colloid And Polymer Science. Springer-verlag, v. 281, n. 2, n. 173, n. 177, 2003.
0303-402X
WOS:000181065100011
10.1007/s00396-002-0771-3
Autor
Pavan, FA
Gushikem, Y
Moro, CC
Costa, TMH
Benvenutti, EV
Institución
Resumen
Anilinepropylsilica xerogel was obtained by using an appropriate organosilane and tetraethyl orthosilicate as precursor reagents. The gelation was carried out using HIF and NaF as catalysts. The presence of Na+ (when NaF was used) resulted in a decrease in the final organic content of the materials. This effect was interpreted as an inhibition of the organosilane polycondensation possibly due to the Na+ interaction with the SiO- groups of the hydrolyzed organosilane. The presence of Na+ also results in morphological changes in the xerogels. 281 2 173 177