Hydrolysis-Stable Mesoporous Silica Material and Method for Producing It

摘要

A hydrolysis-stable mesoporous silica material has a surface bearing functional groups of formula OxSiR4-x, where x is in a range from 1-3 and where each of the radicals R independently of any other contains c carbon atoms, n nitrogen atoms and o oxygen atoms, for which;c+no>0.35.;At least ⅓ of the nitrogen atoms and of the oxygen atoms carries in each case at least one hydrogen atom or is ionic. At least one radical R of a functional group is crosslinked with another radical R of a different functional group. The material is produced by providing a mesoporous silica material and functionalizing the surface of the mesoporous silica material with at least one silane of formula YxSiR4-x, where x is in a range from 1-3 and where Y is a functional group which reacts with a hydroxyl group on the surface of the mesoporous silica material. There is crosslinking of the surface functionalities by treatment with a coupling reagent having at least two reactive groups, each reactive group reacting with a radical R.

主权项

1. A hydrolysis-stable mesoporous silica material whose surface bears functional groups of the formula OxSiR4-x, where x is in a range from 1 to 3 and where each of the radicals R independently of any other contains c carbon atoms, n nitrogen atoms and o oxygen atoms, for whichc+no>0.35,at least a third of the nitrogen atoms and of the oxygen atoms carrying in each case at least one hydrogen atom or being ionic, and at least one radical R of a functional group being crosslinked with another radical R of a different functional group.