Method and device for delivering a substance into the bulk...

C - Chemistry – Metallurgy – 25 – D

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C25D 13/00 (2006.01) C04B 41/45 (2006.01)

Patent

CA 2138971

A method and a device for delivering a substance into the bulk of an open-pore material (1, 16, 36), and the resulting material, are disclosed. A dispersion of ion species within a solution is caused to migrate electrophoretically through the bulk of said material, from a first to a second discrete area thereof, by means of an applied electrical field (E). The dispersion contains two reactive ion species (4, 5) with opposite signs. Said ion species are normally capable of interacting to give a hard and/or hydrophobic element (12). The one ion species whose sign is opposite to that of the zeta potential of the material is combined with a vector (13) having a zeta potential (14) with the same sign as that of the material. Stones or structures may thus be consolidated.

2138971 9401380 PCTABS00165 Il s'agit d'un procédé et d'un dispositif d'introduction de matière dans la masse d'un matériau (1, 16, 36) à porosité ouverte et d'un matériau obtenu avec un tel procédé. On réalise une migration électrophorétique dans la masse de ce matériau d'une dispersion d'espèces ioniques au sein d'une solution, sous l'effet d'un champ électrique appliqué (E) entre une première zone et une seconde zone distincte de ce matériau. La dispersion contient deux espèces ioniques réactives (4, 5) de signes opposés, ces espèces ioniques étant normalement susceptibles d'interagir entre elles pour produire un élément dur ou hydrophobe (12), ou les deux à la fois. Celle des deux espèces ioniques dont la charge est de signe opposé au potentiel zéta du matériau est associée à un vecteur (13) ayant un potentiel zéta (14) de même signe que celui du matériau. L'invention est applicable à la consolidation de pierres ou d'ouvrages d'art.

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