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US 11,447,870 B2Granted
Method for forming water repellent, long-term durable and biomimetic coatings from methyltrimethoxysilane
AssigneeGeorgia Tech Research Corporation
InventorsCornelia Rosu, Laurens Victor Breedveld, Dennis W. Hess
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Abstract
Embodiments of the present disclosure relates generally to methods of providing biomimetic superhydrophobic coatings to substrates, and more specifically to providing biomimetic inorganic silica or silane-based coatings that enable tunable hierarchical surface structures with high coating-to-substrate adhesion, resistance to various mechanical abradents, durability, shelf stability, and enhanced non-wettability or water-repellency.
Claims10
A coating process comprising:
- mixing a non-fluorinated inorganic silica- or silane-based coating mixture comprising methyltrimethoxysilane (MTMS), an ammonium hydroxide catalyst, and an ethanol dispersion medium in a ratio of about 1:4:22 by volume for a reaction time of about 120 minutes;
- coating a polyester fabric substrate with the mixture by soaking the polyester fabric substrate in the mixture for a soaking time of about 2 minutes;
- drying the coated substrate at a temperature of from about 80° C. to about 100° C.;
- annealing or curing the dried substrate at a temperature of from about 100° C. to about 130° C. for up to 24 hours;
- and
- removing excess mixture from the coated substrate by dilution, by gravity, or by physical means;
- wherein the reaction time is sufficient to enable hydrolysis and condensation of the methyltrimethoxysilane (MTMS).
4 more elements
Dependencies are inferred from the claim text.