Method for texturing a substrate having a large surface area
The invention relates: to a process for forming a texture on a substrate, comprising: depositing a deformable layer on the substrate; bringing this deformable layer into contact with the textured face of a daughter stamp; introducing the coated substrate and the daughter stamp into a pouch made of an impermeable material; introducing the pouch and its contents into a hermetic vessel; evacuating air from the vessel until a pressure at most equal to 0.5 bar is reached; sealing the pouch before reintroducing air into the vessel; introducing the sealed pouch and its contents into an autoclave; applying a pressure comprised between 0.5 and 8 bar and a temperature comprised between 25 and 400° C. for 15 minutes to a plurality of hours; opening the pouch; then separating the substrate and the daughter stamp; to a transparent assembly, comprising a glass substrate coated with a textured layer, obtained by this process; and to applications of this process to obtain a substrate intended to extract, guide or redirect light, or a superhydrophobic or superhydrophilic substrate.
1. A process for forming a texture on a substrate, the process comprising:
depositing a deformable layer on the substrate, thereby obtaining a coated substrate, wherein the deformable layer comprises at least one member selected from the group consisting of a sol-gel material, nanoparticles and nanoparticles in a thermoplastic polymer matrix;
bringing the deformable layer into contact with a textured face of a daughter stamp;
introducing the coated substrate and the daughter stamp into a pouch that comprises an impermeable material;
introducing the pouch and its contents into a hermetic vessel;
evacuating air from the vessel until a pressure is at most equal to 0.5 bar;
sealing the pouch, thereby obtaining a sealed pouch;
reintroducing air into the vessel after sealing the pouch;
introducing the sealed pouch and its contents into an autoclave;
applying a pressure of between 0.5 and 8 bar and a temperature of between 25 and 400° C. for at least 15 minutes;
opening the pouch; then
separating the substrate and the daughter stamp.
2. The process of claim 1 , wherein the process obtains a substrate suitable for extracting, guiding, or redirecting light.
3. The process of claim 1 , wherein the process obtains a substrate suitable for microfluidics.
4. The process of claim 1 , wherein the process obtains a superhydrophobic or superhydrophilic substrate.
5. The process of claim 1 , wherein the substrate is a glass substrate.
6. The process of claim 1 , wherein the substrate is a soda-lime-silica float glass.
7. The process of claim 1 , wherein the deformable layer comprises a sol-gel material.
8. The process of claim 1 , wherein the deformable layer comprises nanoparticles.
9. The process of claim 8 , wherein the nanoparticles are TiO 2 nanoparticles.
10. The process of claim 8 , wherein the nanoparticles are luminescent nanoparticles.
11. The process of claim 1 , wherein the deformable layer comprises nanoparticles in a thermoplastic polymer matrix.
12. The process of claim 11 , wherein the nanoparticles are TiO 2 nanoparticles.
13. The process of claim 11 , wherein the nanoparticles are luminescent nanoparticles.
14. A process for forming a texture on a substrate, the process comprising:
depositing a deformable layer on the substrate, thereby obtaining a coated substrate;
bringing the deformable layer into contact with a textured face of a daughter stamp, wherein the textured face of the daughter stamp is air permeable;
introducing the coated substrate and the daughter stamp into a pouch that comprises an impermeable material;
introducing the pouch and its contents into a hermetic vessel;
evacuating air from the vessel until a pressure is at most equal to 0.5 bar;
sealing the pouch, thereby obtaining a sealed pouch;
reintroducing air into the vessel after sealing the pouch;
introducing the sealed pouch and its contents into an autoclave;
applying a pressure of between 0.5 and 8 bar and a temperature of between 25 and 400° C. for at least 15 minutes;
opening the pouch; then
separating the substrate and the daughter stamp.
15. A process for forming a texture on a substrate, the process comprising:
depositing a deformable layer on the substrate, thereby obtaining a coated substrate;
bringing the deformable layer into contact with a textured face of a daughter stamp;
introducing the coated substrate and the daughter stamp into a pouch that comprises an impermeable material;
introducing the pouch and its contents into a hermetic vessel;
evacuating air from the vessel until a pressure is at most equal to 0.5 bar;
sealing the pouch, thereby obtaining a sealed pouch;
reintroducing air into the vessel after sealing the pouch;
introducing the sealed pouch and its contents into an autoclave;
applying a pressure of between 0.5 and 8 bar and a temperature of between 25 and 400° C. for at least 15 minutes;
opening the pouch; then
separating the substrate and the daughter stamp,
wherein
the textured face of the daughter stamp comprises a polymer or hybrid organic (polymer)/inorganic material, and
applying the temperature in the autoclave comprises raising the temperature in succession to a temperature above, then below the glass transition temperature of the polymer or hybrid organic (polymer)/inorganic material, or vice versa.