Abstract

POSADA, John Alexander; GIRALDO, Oscar Hernán  and  CARDON, Carlos Ariel. Synthesis and characterization of functionalized mesostructured silicas with acid sulphonic groups. Rev.fac.ing.univ. Antioquia [online]. 2011, n.58, pp.63-73. ISSN 0120-6230.

Hexagonal (MCM-41, SBA-15, and HMS) and cubic (MCM-48) mesostructured silicas were synthesized and functionalized with the propylsulphonic acid group, by grafting and co-condensation methods. Structural conformation, physical-chemistry characterization, and morphology of the materials was performed by XRD, FT-IR, TGA, and SEM techniques. Higher functionalization degrees were reached by co-condensation method, for MCM-48 and SBA-15 mesophases. These higher functionalization degrees lead to less thermally and structurally stable materials than those obtained by the grafting method.

Keywords : Characterization; co-condensation; grafting; mesoporous; functionalization.

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