| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 77275 | Microporous and Mesoporous Materials | 2007 | 9 Pages |
The application of siliceous mesostructured cellular foams (MCF) with the surface functionalised using different organosilanes to immobilize covalently invertase and glucoamylase have been studied. Four organosilanes were applied: 3-aminopropyltriethoxysilane (APTS), 2-aminoethyl-3-aminopropylmethyldimethoxysilane (AEAPMDS), 2-aminoethyl-3-aminopropyltrimethoxysilane (AEAPTS) and 3-glicydoxypropyl-triethoxysilane (GPTS). The samples modified using alkylamines were further functionalised with glutaraldehyde (GLA), a cross linker. Commercially available silica gels and Eupergit C were used for comparison. Activity of MCF-based biocatalysts was significantly higher than of the silica gel and Eupergit C based counterparts. In the best systems the determined activity of both immobilized enzymes was even higher than that of the free enzymes. The glutaraldehyde (GLA)-amino linkage formed by organosilanes with two amino groups was the most effective system for MCF-bound invertase and that formed by APTS in the covalent immobilization of glucoamylase. A unique porous structure of MCF was found to be a critical factor which renders siliceous mesostructured foam a very promising material for immobilization of enzymes.
