The influence of surfactant nature on the structural, morphological and sorption properties of ormosils with immobilized aminogroups
DOI:
https://doi.org/10.26565/2220-637X-2013-22-20Keywords:
template, ormosil, bidentate binding, cooperativity effectsAbstract
Two samples of ormosils, Material 1 and Material 2, synthesized by sol-gel procedure using cation and anion surfactants, have specific surface areas 17±2 and 176±5 m2 g-1 and average pore sizes 3.6 and 3.3 nm, correspondingly. The proposed method for surfactants removing was better for Material 1 than for Material 2. The model of bidentate binding adequately describes the protolytic properties of immobilized aminogroups in both cases. The basicity of immobilized aminogroups is higher for Material 2; negative cooperativity effects are observed at protonation of aminogroups for both materials.
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