Process for obtaining superhydrophobic or superhydrophilic surfaces
First Claim
1. A process for coating surfaces without the use of heat comprising:
- a) depositing at least two nanoparticle populations, of different sizes, on a surface to be treated, andb) Cross-linking the nanoparticle-coated surface using an acidic hydroalcoholic solution containing TEOS as the only cross-linking agent on the surface to be treated to form a cross-linked surface,wherein heat is not applied to the surface to be treated.
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Abstract
The present invention relates to a process for texturing surfaces providing the latter with superhydrophobic, superoleophobic, superhydrophilic or even superoleophilic properties. This process comprises i) a step of texturing the surface (via the deposition of nanoparticles of different sizes); ii) a step of curing the surface thus textured (with a curing agent); and, optionally, iii) a step of modifying the properties of the surface with perfluorinated (and therefore hydrophobic) molecules. This process is suitable, inter alia, for treating transparent and/or heat-sensitive materials and surfaces. Specifically, none of the steps of the process use a temperature higher than 100° C. Thus, the process of the invention is particularly suitable for treating transparent surfaces composed of non-mineral materials, such as polycarbonate for example, as it will affect neither their transparency nor their optical properties.
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Citations
17 Claims
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1. A process for coating surfaces without the use of heat comprising:
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a) depositing at least two nanoparticle populations, of different sizes, on a surface to be treated, and b) Cross-linking the nanoparticle-coated surface using an acidic hydroalcoholic solution containing TEOS as the only cross-linking agent on the surface to be treated to form a cross-linked surface, wherein heat is not applied to the surface to be treated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A process for coating surfaces comprising:
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a) depositing at least two nanoparticle populations, of different sizes, on a surface to be treated, and b) cross-linking the nanoparticle-coated surface using an acidic hydroalcoholic solution containing TEOS as the only cross-linking agent, wherein the process does not involve heating the surface to be treated and the nanoparticles are not coated with a compound selected from the group consisting of;
amine, cationic polymers, and combinations thereof. - View Dependent Claims (17)
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Specification