Non-fluorinated water-based superhydrophobic surfaces
View Patent ↗A superhydrophobic surface includes a substrate treated with a non-fluorinated composition, the composition including a hydrophobic component free of fluorine; a filler particle; and water, wherein the composition is at a pH greater than 7, and wherein the hydrophobic component is in an aqueous dispersion. The superhydrophobic surface alternatively includes a substrate treated with a non-fluorinated composition, the composition including a hydrophobic polymer free of fluorine; an exfoliated graphite filler particle including acid functional groups; water; and a stabilizing compound, wherein the composition is at a pH greater than 7, and wherein the hydrophobic polymer is in an aqueous dispersion.
1. A superhydrophobic surface comprising a substrate treated with a non-fluorinated composition comprising:
a water-dispersible hydrophobic component free of fluorine;
a water-dispersible filler particle; and
water, wherein the composition is at a pH greater than 7, wherein the hydrophobic component is in an aqueous dispersion, and wherein the aqueous dispersion is free of organic solvents.
2. The superhydrophobic surface of claim 1 , wherein the hydrophobic component is selected from the group consisting of polymers and nanoparticles.
3. The superhydrophobic surface of claim 1 , wherein the hydrophobic component includes a polyolefin.
4. The superhydrophobic surface of claim 1 , wherein the hydrophobic component includes a co-polymer of olefin and acrylic acid.
5. The superhydrophobic surface of claim 1 , wherein the filler particle has a high aspect ratio.
6. The superhydrophobic surface of claim 1 , wherein the filler particle includes acrylic acid, carboxylic acid, or a combination thereof as a functional group.
7. The superhydrophobic surface of claim 1 , wherein the filler particle includes an exfoliated graphite.
8. The superhydrophobic surface of claim 7 , wherein the exfoliated graphite is selected from graphene, a few layer graphene, and an exfoliated graphite nanoplatelet.
9. The superhydrophobic surface of claim 1 , wherein the composition is free of volatile organic compounds.
10. The superhydrophobic surface of claim 1 , further comprising a stabilizing compound.
11. The superhydrophobic surface of claim 10 , wherein the stabilizing compound is selected from KOH and NH 3 (aq).
12. The superhydrophobic surface of claim 1 , wherein the substrate is a nonwoven web.
13. The superhydrophobic surface of claim 1 , wherein the substrate is a tissue product.
14. The superhydrophobic surface of claim 1 , wherein the filler particle includes an acid functional group.
15. A superhydrophobic surface comprising a substrate treated with a non-fluorinated composition comprising:
a water-dispersible hydrophobic polymer free of fluorine;
a water-dispersible exfoliated graphite filler particle including acid functional groups;
water; and
a stabilizing compound, wherein the composition is at a pH greater than 7, wherein the hydrophobic polymer is in an aqueous dispersion, and wherein the aqueous dispersion is free of organic solvents.
16. The superhydrophobic surface of claim 15 , wherein the hydrophobic polymer includes a polyolefin.
17. The superhydrophobic surface of claim 15 , wherein the filler particle includes acrylic acid, carboxylic acid, or a combination thereof as a functional group.
18. The superhydrophobic surface of claim 15 , wherein the exfoliated graphite is selected from graphene, a few layer graphene, and an exfoliated graphite nanoplatelet.
19. The superhydrophobic surface of claim 15 , wherein the stabilizing compound is selected from KOH and NH 3 (aq).
20. A superhydrophobic surface comprising a substrate treated with a non-fluorinated composition comprising:
a water-dispersible hydrophobic component free of fluorine;
a stabilizing compound, wherein the stabilizing compound is selected from KOH and NH 3 (aq);
a water-dispersible filler particle; and
water, wherein the composition is at a pH greater than 7, wherein the hydrophobic component is in an aqueous dispersion, and wherein the aqueous dispersion is free of organic solvents.