Method for preparing a composite material comprising a polymeric matrix and a filler consisting in ion exchange inorganic particles

摘要

The invention relates to a method for preparing a composite material comprising a polymeric matrix and a filler consisting in ion exchange inorganic particles, comprising a step for synthesis in situ of said particles within the polymeric matrix.

主权项

1. A method for preparing a composite material comprising a polymeric matrix and a filler consisting of ion exchange inorganic particles comprising a step for synthesis in situ of said particles within the polymeric matrix,
wherein the step for synthesis in situ is carried out with the sol-gel method comprising the following operations: an operation for putting the constitutive polymer(s) of the matrix in contact with one or more precursors of the inorganic particles, said precursor(s) fitting the following formula:
(X)y-n-M-(R)n wherein:
M is a metal element or a metalloid element; X is a hydrolyzable chemical group; R is a chemical exchange group or a precursor group of an ion exchange chemical group; y corresponds to the valence of the element M; and n is an integer ranging from 0 to (y-1);
an operation for hydrolysis-condensation of said precursor(s), by which operation inorganic particles are obtained resulting from the hydrolysis-condensation of said precursors;in the case when R is a precursor group of an ion exchange chemical group, an operation for transforming the precursor group into an ion exchange chemical group or, in the case when n =0, an operation for functionalizing said particles with ion exchange chemical groups,wherein R is a cation exchange group of formula —R2—Z1, wherein:
R2 is a simple bond, a linear or branched alkylene group or a cyclic hydrocarbon group;Z1 is an —SO3H, —PO3H2, or —CO2H group, optionally as salts; orwherein R is a group of formula —R2—Z3, wherein:
R2 is a simple bond, a linear or branched alkylene group, or a cyclic hydrocarbon group;Z3 is a precursor group of a group Z1 as defined above.