Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Frederic Goettmann

Fabien Frances

Amélie Ludwig

David Lambertin

Fabien Frizon

Adrien Rooses

Arnaud Poulesquen

Romain Castellani

The invention relates to a gel for removing a graffiti from a surface of a solid substrate, consisting of a colloidal solution comprising an inorganic viscosifying agent, at least one solvent, optionally at least one surfactant, and optionally at least one dye and/or pigment. The invention also relates to a method for removing a graffiti from a surface of a solid substrate, wherein the gel is applied to said surface.

Gel for removing graffiti and method for removing graffiti using said gel

The present invention relates to a method for preparing a macroporous and mesoporous geopolymer and especially a geopolymer foam, comprising the following successive steps (1) preparing a composite material comprising a geopolymer matrix and an organic liquid; then (2) eliminating said organic liquid by a treatment selected from the group consisting of heat treatment, oxidation treatment, photodegradation treatment and extraction using a supercritical fluid or ultrasounds.

Method for producing a macroporous and mesoporous geopolymer, with controlled porosity

The use of a gel consisting of a colloidal solution comprising, preferably consisting of: 5% to 30% by weight, preferably 5% to 25% by weight, more preferably 8% to 20% by weight relative to the weight of the gel, of at least one inorganic viscosifying agent; a mineral base selected from among hydroxides of alkaline metals, hydroxides of alkaline-earth metals and the mixtures thereof, said mineral base being present in a proportion of 0.05 to 10 mol/L of gel, preferably in a proportion of 0.1 to 5 mol/L of gel; an oxidizing agent stable in a basic medium selected from among permanganates, persulfates, ozone, hypochlorites and the mixtures thereof, said oxidizing agent stable in a basic medium being present in a proportion of 0.05 to 5 mol/L of gel, preferably 0.1 to 2 mol/L of gel; 0.1% to 2% by weight relative to the weight of the gel, of at least one surfactant; and a solvent; the gel not containing any super-absorbent polymer, to remove a biofilm present on a surface of a solid substrate.

Use of an oxidising alkaline gel to remove a biofilm on a surface of a solid substrate

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Courthezon, France

Frederic Goettmann