METHOD FOR PREPARING A COMPOSITION COMPRISING FUNCTIONALISED SILICO/GERMANO-METAL PARTICLES AND COMPOSITION OBTAINED

摘要

A method for preparing a composition includes silico/germano-metal particles functionalized by at least one organic group, which involves:—carrying out a hydrothermal treatment of a hydrogel precursor of the silico/germano-metal mineral particles, and—preparing a hydrogel including silico/germano-metal particles having at least one organic group by co-precipitation in an aqueous medium. A composition including functionalized silico/germano-metal mineral particles of which 1% to 75% of the silicon atoms and/or of the germanium atoms are covalently bonded to at least one organic group is also described.

主权项

1/ Method for preparing a composition comprising silico/germano-metallic mineral particles functionalised by at least one organic group, said particles comprising at least one silicon (Si) atom and/or at least one germanium (Ge) atom and at least one atom of a metal (M) chosen from the group formed of alkali metals, alkaline earth metals and transition metals, wherein:
a hydrothermal treatment under pressure of a hydrogel precursor of said silico/germano-metallic mineral particles is carried out, characterised in that: a hydrogel precursor comprising silico/germano-metallic particles having, said at least one organic group is prepared by carrying out a coprecipitation reaction in an aqueous medium between:
at least one metal salt of said metal (M),at least one source of silicon and/or of germanium, andat least one compound chosen from water-soluble oxysilanes and oxygermanes having the formula (I):wherein:
T is chosen from silicon and germanium, R1, R2 and R3 are identical or different and are chosen from a hydrogen and linear alkyl groups containing from 1 to 3 carbon atom(s), and A is chosen from aliphatic groups, aromatic groups and hydrocarbon groups containing at least one heteroatom.