Hydrophobic and superhydrophobic coatings and methods thereof
AssigneeSimon Fraser University
InventorsHua-Zhong Yu, Lishen Zhang
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Abstract
Hydrophobic and superhydrophobic coatings and articles coated with the hydrophobic and superhydrophobic coatings that exhibit superior hydrophobic properties. The hydrophobic or superhydrophobic coatings and the articles coated therewith can be made using unconventional methods, for example, based on a single-step, stoichiometrically-controlled hydrolysis and condensation reaction of organosilanes. The reaction can provide micro- to nano-scale hierarchical siloxane aggregates that are dispersible in solvents (e.g., organic solvents) to provide a coating mixture.
Claims31
An article, comprising:
- a hydrophobic coating comprising a microparticle,
- wherein:
- the microparticle is disposed on and covalently bound to a surface of the article,
- the microparticle is porous and comprises a hierarchical morphology,
- the microparticle comprises an agglomerated plurality of fibers, and
- the fiber comprises a C12-C18 alkylhalosiloxane, a C6-C18 fluoroalkylhalosiloxane, or any combination thereof.
A hydrophobic coating formulation, comprising:
- a suspension, comprising a microparticle suspended in a continuous phase,
- wherein
- the microparticle is porous and comprises a hierarchical morphology,
- the microparticle comprises an agglomerated plurality of fibers, and
- the fiber comprises a C12-C18 alkylhalosiloxane, a C6-C18 fluoroalkylhalosiloxane, or any combination thereof;
- and
- wherein the continuous phase comprises an organic solvent, an alkyltrihalosilane, or a combination thereof.
A method of making a hydrophobic coating, comprising:
- providing a mixture of water, and a C12-C18 alkyltrihalosilane and/or a C6-C18 fluoroalkyltrihalosilane;
- mixing the mixture to provide an emulsion of nanodroplets comprising a diameter of from 1 nm to 1000 nm;
- reacting the water, and the C12-C18 alkyltrihalosilane and/or C6-C18 fluoroalkyltrihalosilane in the mixture to provide a plurality of fibers comprising C12-C18 alkylhalosiloxane and/or C6-C18 fluoroalkylhalosiloxane;
- and
- agglomerating the plurality of fibers to provide porous microparticles suspended in C12-C18 alkyltrihalosilane and/or C6-C18 fluoroalkyltrihalosilane.
Dependencies are inferred from the claim text.